WO2017141427A1

WO2017141427A1 - Treatment system, power supply device, and output control circuit

Info

Publication number: WO2017141427A1
Application number: PCT/JP2016/054894
Authority: WO
Inventors: 興川島
Original assignee: オリンパス株式会社
Priority date: 2016-02-19
Filing date: 2016-02-19
Publication date: 2017-08-24

Abstract

This power supply device includes output detection circuits (104a, 104b), an output control circuit (102), and a main control circuit (100). The output control circuit (102) has a plurality of circuit regions (200a, 200b). Each of the circuit regions (200a, 200b) is provided with a fault detection mechanism that has an output acquisition circuit (204a, 204b), an error detection circuit (208a, 208b), and a communication circuit (202a, 202b). One of the circuit regions further includes an output generation circuit (206) that generates electric power for generating energy to be used in a treatment unit.

Description

Treatment system, power supply device and output control circuit

The present invention relates to a treatment system that treats a subject using energy, a power supply device that outputs electric power for generating energy used in a treatment unit of the treatment system, and an output control circuit used in such a power supply device. About.

A treatment system for treating a living tissue of a subject using energy is known. For example, the treatment system of International Publication No. WO2010 / 047395 is a treatment system that treats a living tissue with ultrasonic energy. In a treatment system that treats this type of subject, it is important to be able to accurately detect a system failure. For this reason, the treatment system of International Publication No. WO2010 / 047395 has a failure detection mechanism for detecting a failure.

If the failure detection mechanism itself fails, failure detection cannot be performed accurately. For this reason, redundancy of failure detection is also increased by duplicating the failure detection mechanism. However, when the failure detection mechanism is duplicated, the difficulty of design accuracy of each failure detection mechanism is likely to increase.

The present invention has been made in view of the circumstances described above, and is a treatment system, a power supply device, and an output control circuit used in such a power supply device capable of increasing the redundancy of failure detection while relaxing the design accuracy. The purpose is to provide.

The treatment system according to the first aspect of the present invention includes a treatment unit that treats a subject using energy, a plurality of output detection circuits that detect a physical quantity related to the energy, and a plurality of output detection circuits. An output control circuit for controlling the energy according to the physical quantity detected in step (b), and a main control circuit for controlling the output control circuit, the output control circuit having a plurality of separated circuit areas. Each of the circuit areas includes an output acquisition circuit that acquires the value of the physical quantity detected by the corresponding output detection circuit, and the value of the physical quantity acquired by the output acquisition circuit included in each of the circuit areas. An error detection circuit that detects a failure based on the presence or absence of a difference and notifies an error, and a communication circuit that communicates information with the main control circuit, and any one of the circuits The area generates electric power for generating the energy according to a comparison result between the physical quantity value acquired by the output acquisition circuit and the target value input from the main control circuit via the communication circuit. The communication circuit further includes an output generation circuit, wherein the communication circuit communicates the error notification from the error detection circuit to the main control circuit, and communicates the target value from the main control circuit to the output generation circuit.

The power supply device according to the second aspect of the present invention includes a plurality of output detection circuits that detect a physical quantity related to energy generated in a treatment unit that treats a subject, and the plurality of output detection circuits that detect the physical quantities. An output control circuit that controls the energy according to a physical quantity; and a main control circuit that controls the output control circuit, the output control circuit having a plurality of separated circuit regions, and each of the circuits The area is an output acquisition circuit that acquires the value of the physical quantity detected by the corresponding output detection circuit, and whether there is a difference between the values of the physical quantity acquired by the output acquisition circuit included in each of the circuit areas An error detection circuit that detects a failure and notifies an error, and a communication circuit that communicates information with the main control circuit, and any one of the circuit areas includes the output An output generation circuit for generating electric power for generating the energy according to a comparison result between the physical quantity value acquired by the acquisition circuit and the target value input from the main control circuit via the communication circuit; And the communication circuit communicates the error notification from the error detection circuit to the main control circuit, and communicates the target value from the main control circuit to the output generation circuit.

The output control circuit according to the third aspect of the present invention provides the energy in accordance with the physical quantity detected by each of a plurality of output detection circuits that detect a physical quantity related to energy generated in a treatment unit that treats the subject. An output control circuit for controlling, wherein the output control circuit has a plurality of separated circuit areas, and each of the circuit areas acquires the value of the physical quantity detected by the corresponding output detection circuit. An output detection circuit, an error detection circuit that detects an error by detecting the presence or absence of a difference between the values of the physical quantities acquired by the output acquisition circuit included in each of the circuit areas, and the output control circuit. A main control circuit to be controlled and a communication circuit for communicating information, and any one of the circuit areas includes the value of the physical quantity acquired by the output acquisition circuit and the communication An output generation circuit for generating electric power for generating the energy in accordance with a comparison result with a target value input from the main control circuit via a circuit, and the communication circuit includes an output from the error detection circuit. The error notification is communicated to the main control circuit, and the target value from the main control circuit is communicated to the output generation circuit.

According to the present invention, it is possible to provide a treatment system, a power supply apparatus, and an output control circuit used for such a power supply apparatus that can increase the redundancy of failure detection while relaxing the design accuracy.

FIG. 1 is a diagram illustrating a configuration of an example of a treatment system including a power supply device according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an exemplary configuration of the inside of the power supply apparatus. FIG. 3 is a block diagram illustrating a configuration example of the inside of the output control circuit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of an example of a treatment system including a power supply device according to an embodiment of the present invention. A treatment system 1 shown in FIG. 1 is an ultrasonic treatment system. The ultrasonic treatment system is configured to treat a subject using energy by ultrasonic vibration in a treatment unit.

Hereinafter, the description will be continued assuming that the treatment system 1 is an ultrasonic treatment system. However, the treatment system 1 may not be an ultrasonic treatment system. The power supply device according to the present embodiment can be applied to various treatment systems configured to treat a subject using energy generated in a treatment unit. For example, the power supply device according to the present embodiment is configured to treat a subject using thermal energy generated by a treatment system and a heater configured to treat the subject using energy by high-frequency current. It can also be applied to treatment systems.

The treatment system 1 includes a treatment tool 10 and a power supply device 80. The treatment tool 10 is a part for performing treatment on a subject. The power supply device 80 supplies electric power for ultrasonically vibrating the distal end of the treatment instrument 10.

The treatment instrument 10 as a treatment unit includes a handle unit 20 and a probe unit 30. In the following description, the probe unit 30 side of the treatment instrument 10 is referred to as the distal end side of the treatment instrument 10, and the handle unit 20 side is referred to as the proximal end side.

The handle unit 20 has an ultrasonic transducer inside. The ultrasonic transducer is connected to the power supply device 80 via the cable 26. The ultrasonic vibrator vibrates ultrasonically according to the electric power from the power supply device 80. The ultrasonic vibration generated by the ultrasonic vibrator is transmitted to the probe unit 30. The probe unit 30 includes a probe 180 and a jaw 182. The probe 180 is connected to the ultrasonic vibrator and vibrates with the vibration of the ultrasonic vibrator. The jaw 182 is configured to be openable and closable.

The handle unit 20 has a hand switch 22. The hand switch 22 is provided for inputting an instruction for driving the ultrasonic transducer. The hand switch 22 may include a plurality of switches so that a plurality of types of inputs corresponding to driving of a plurality of types of ultrasonic transducers are performed. The hand switch 22 is connected to the power supply device 80 via the cable 26. The power supply device 80 detects an input to the hand switch 22 and supplies power corresponding to the input to the ultrasonic transducer.

Further, the handle unit 20 has a movable handle 23 and a fixed handle 24. When the movable handle 23 is closed, the jaw 182 provided at the tip of the probe unit 30 is closed. The handle unit 20 has a rotation operation knob 25. By rotating the rotary operation knob 25, the probe unit 30 is rotated around the longitudinal axis of the treatment instrument 10.

When performing a treatment, the user holds the handle unit 20 and brings the probe 180 of the probe unit 30 that vibrates ultrasonically into contact with the biological tissue to be treated. At this time, the user operates the hand switch 22 to vibrate the ultrasonic transducer. The vibration generated by the ultrasonic transducer is transmitted to the probe 180. When the tip of the vibrating probe 180 comes into contact with the living tissue, the living tissue is treated.

FIG. 2 is a block diagram showing an example of the internal configuration of the power supply device 80. The power supply device 80 includes a main control circuit 100, an output control circuit 102, and

output detection circuits

104a and 104b.

The main control circuit 100 is constituted by a CPU, for example, and controls the operation of the output control circuit 102. For example, the main control circuit 100 inputs a target value of ultrasonic vibration to the output control circuit 102. The target value of the ultrasonic vibration is set according to the input of the operator's hand switch 22, for example, and is set according to the physical quantity to be controlled by the output control circuit 102. When the amplitude of the probe 180 is directly changed according to the input of the operator's hand switch 22, the target value is, for example, a current value corresponding to the amplitude of the ultrasonic vibration. Further, when the temperature of the living tissue is controlled in accordance with the input of the operator's hand switch 22, the target value is, for example, a current corresponding to the amplitude of ultrasonic vibration necessary to set the temperature of the living tissue to a predetermined temperature. Value.

The main control circuit 100 also stops the operation of the output control circuit 102 when receiving an error notification from the output control circuit 102.

The output control circuit 102 as a power supply circuit is configured by, for example, an FPGA. The output control circuit 102 is electrically connected to the ultrasonic transducer 27 and generates electric power for driving the ultrasonic transducer 27. For example, the output control circuit 102 feeds back a current value for driving the ultrasonic transducer 27 so that the current value of the physical quantity detected by the output detection circuit 104a becomes the target value input from the main control circuit 100. Control.

Also, the output control circuit 102 detects a failure by comparing the difference between the physical quantity detected by the output detection circuit 104a and the physical quantity detected by the output detection circuit 104b. When a failure is detected, the output control circuit 102 notifies the main control circuit 100 of an error.

The

output detection circuits

104a and 104b detect a physical quantity related to the energy generated in the treatment instrument 10, and input a signal corresponding to the detected physical quantity to the output control circuit 102. In the case of an ultrasonic treatment system, this physical quantity is the output current and output voltage of the output control circuit 102. The circuit configuration of the

output detection circuits

104 a and 104 b can be selected as appropriate depending on the physical quantity used for feedback control in the output control circuit 102. However, the circuit configurations of the

output detection circuits

104a and 104b detect physical quantities at the same location. For example, the

output detection circuits

104a and 104b detect currents at the same location, such as the output terminal portion of the output control circuit 102, respectively.

FIG. 3 is a block diagram showing an example of the internal configuration of the output control circuit 102. As shown in FIG. 3, the output control circuit 102 has two separated circuit regions 200a and 200b. The circuit area 200a and the circuit area 200b are physically and functionally separated so as not to be affected by the failure of the circuit areas. That is, the circuit block provided in the circuit area 200a does not extend over the circuit area 200b, and the circuit block provided in the circuit area 200b does not extend over the circuit area 200a. Also, the wiring connecting the circuit blocks in the circuit area 200a is provided only in the circuit area 200a and is not routed outside the circuit area 200a. Further, the wiring connecting the circuit blocks in the circuit area 200b is provided only in the circuit area 200b and is not routed outside the circuit area 200b. The wiring connecting the circuit area 200a and the circuit area 200b is also configured so as not to be affected by the failure of the circuit areas. Here, the method of separating the circuit areas 200a and 200b is not particularly limited as long as it is physically and functionally separated so as not to be affected by the failure of the circuit areas.

The circuit area 200a includes a communication circuit 202a, an output acquisition circuit 204a, an output generation circuit 206, and an error detection circuit 208a as circuit blocks. The circuit area 200b has a communication circuit 202b, an output acquisition circuit 204b, and an error detection circuit 208b as circuit blocks.

The communication circuit 202a includes an interface for performing communication between the circuit area 200a and the main control circuit 100. The communication circuit 202b has the same circuit configuration as the communication circuit 202a and includes an interface for performing communication between the circuit area 200b and the main control circuit 100. The

communication circuits

202a and 202b perform communication by a communication method such as I ² C (Inter-Integrated Circuit), UART (Universal Asynchronous Receiver Transmitter), or SPI (Serial Peripheral Interface). Of course, the

communication circuits

202a and 202b may communicate with the main control circuit 100 by other methods.

The

output acquisition circuits

204a and 204b each acquire the output from the corresponding output detection circuit. That is, the output acquisition circuit 204a acquires the physical quantity (for example, current) detected by the output detection circuit 104a by converting it into a digital signal, for example. The output acquisition circuit 204b acquires the physical quantity (for example, current) detected by the output detection circuit 104b by converting it into a digital signal, for example.

The output generation circuit 206 generates electric power for generating energy in the treatment instrument 10 according to the deviation between the target value input from the main control circuit 100 and the current value of the physical quantity acquired by the output acquisition circuit 204a. For example, the output generation circuit 206 changes the output voltage so that there is no deviation between the target value of the current input from the main control circuit 100 and the current value acquired by the output acquisition circuit 204a. The power for generating is generated.

The

error detection circuits

208a and 208b have the same circuit configuration, and detect a system failure from the difference in physical quantity acquired by the output acquisition circuit included in each circuit area. When detecting a system failure, the

error detection circuits

208a and 208b output an error notification indicating that a system failure has been detected to the main control circuit 100. For example, the error detection circuit 208a detects a system failure from the difference between the current value acquired by the output acquisition circuit 204a and the current value acquired by the output acquisition circuit 204b. The error detection circuit 208b also detects a system failure from the difference between the current value acquired by the output acquisition circuit 204a and the current value acquired by the output acquisition circuit 204b.

Hereinafter, the operation of the power supply device 80 will be described. When the power supply 80 is turned on, the main control circuit 100 acquires the input of the hand switch 22. Then, the main control circuit 100 inputs a target value corresponding to the input of the hand switch 22 to the output generation circuit 206 of the output control circuit 102 via the communication circuit 202 a of the output control circuit 102.

The output generation circuit 206 generates electric power for driving the treatment instrument 10 according to the deviation between the current value of the physical quantity (for example, current) acquired by the output acquisition circuit 204a and the target value. Thereby, energy corresponding to the input of the hand switch 22 is generated in the treatment instrument 10. Then, the subject is treated.

In parallel with the operation of the output generation circuit 206, the error detection circuit 208a and the error detection circuit 208b detect the presence or absence of a system failure. That is, the error detection circuit 208a detects a system failure from the difference between the current value of the physical quantity (for example, current) acquired by the output acquisition circuit 204a and the current value of the physical quantity acquired by the output acquisition circuit 204b. The error detection circuit 208b also detects a system failure from the difference between the current physical quantity value acquired by the output acquisition circuit 204a and the current physical quantity value acquired by the output acquisition circuit 204b.

The

output acquisition circuits

204a and 204b acquire physical quantities at the same location. Therefore, normally, the value of the physical quantity acquired by the output acquisition circuit 204a and the value of the physical quantity acquired by the output acquisition circuit 204b show the same value. Therefore, it is possible to detect a system failure based on whether there is a difference between the physical quantity value acquired by the output acquisition circuit 204a and the physical quantity value acquired by the output acquisition circuit 204b.

The error detection circuit 208a outputs an error notification indicating that a failure has been detected to the main control circuit 100 when a failure in the system is detected. Similarly, when detecting a system failure, the error detection circuit 208b outputs an error notification indicating that a failure has been detected to the main control circuit 100. The main control circuit 100 stops the operation of the output control circuit 102 when an error notification is input from at least one of the error detection circuit 208a and the error detection circuit 208b.

As described above, according to this embodiment, a plurality of circuit areas are provided in one output control circuit 102. Also, in each circuit area, a failure detection mechanism of the same configuration that detects a system failure based on the physical quantity detected by the output detection circuit of the same configuration (in the example of the figure, an output acquisition circuit, an error detection circuit, a communication Circuit). A fault detection mechanism with the same configuration can be easily designed. For this reason, it is possible to increase the redundancy of failure detection while relaxing the design accuracy. In addition, since it is not necessary to mount the failure detection mechanism on an individual IC, cost and space can be reduced. In addition, since it is not necessary to detect errors in the main control circuit 100, the load on the main control circuit 100 is reduced.

In addition, since a plurality of failure detection mechanisms are provided in the output control circuit 102, the main control circuit 100 and the output detection are different from the case where the failure detection mechanism is provided in the main control circuit 100 to achieve duplication. A communication line with the

circuit

104a or 104b becomes unnecessary. That is, only the communication line between the main control circuit 100 and the output control circuit 102 is sufficient. Further, by setting the communication method between the main control circuit 100 and the output control circuit 102 to I ² C, the number of communication interfaces can be increased as compared with the case where the main control circuit 100 is provided with a failure detection mechanism and duplexed. It is possible to reduce.

Further, the circuit area 200a and the circuit area 200b are physically and functionally separated so as not to be affected by the failure of the circuit areas. For this reason, even if the failure detection mechanism itself in one circuit area fails, the failure does not affect the failure detection mechanism in the other circuit area. For this reason, it is possible to detect a system failure using the other failure detection mechanism. Thereby, it is possible to further increase the redundancy of failure detection.

In the above-described embodiment, the number of circuit areas is two. However, the number of circuit areas may be three or more. In this case, by providing a failure detection mechanism in each circuit area, the failure detection mechanism can be multiplexed more than triple. Even in this case, the output generation circuit 206 may be provided in one circuit area. Further, when the failure detection mechanism is tripled or more, it may be configured such that the presence or absence of a system failure is determined by the majority of the outputs of the plurality of failure detection mechanisms. The system may be configured to determine that the system has failed when a failure of the system is detected by one failure detection mechanism.

Further, as described above, the technique of the present embodiment can be applied to treatment systems other than the ultrasonic treatment system. In this case, the configuration of the failure detection mechanism is appropriately selected according to the type of energy used in each treatment system.

Claims

A treatment unit that uses energy to treat the subject;
A plurality of output detection circuits for detecting physical quantities related to the energy;
An output control circuit that controls the energy according to the physical quantity detected by each of the plurality of output detection circuits;
A main control circuit for controlling the output control circuit;
Comprising
The output control circuit has a plurality of separated circuit regions,
Each said circuit area is
An output acquisition circuit for acquiring a value of the physical quantity detected by the corresponding output detection circuit;
An error detection circuit that detects a failure and notifies an error according to the presence or absence of a difference between the values of the physical quantities acquired by the output acquisition circuit included in each of the circuit areas; and
A communication circuit for communicating information with the main control circuit;
Including
Any one of the circuit regions generates the energy according to a comparison result between the physical quantity value acquired by the output acquisition circuit and a target value input from the main control circuit via the communication circuit. An output generation circuit for generating power for
The communication circuit communicates the error notification from the error detection circuit to the main control circuit, and communicates the target value from the main control circuit to the output generation circuit.
Treatment system.
The output detection circuit has the same circuit configuration,
Each of the output acquisition circuit, the error detection circuit, and the communication circuit included in the plurality of circuit regions has the same circuit configuration.
The treatment system according to claim 1.
The treatment system according to claim 1, wherein the plurality of circuit areas are physically and functionally separated so as not to be affected by a failure of each other circuit area.
The treatment system according to claim 1, wherein the output control circuit is configured by an FPGA.
The treatment system according to claim 1, wherein the output control circuit has two separated circuit areas.
The treatment system according to claim 1, wherein the energy is ultrasonic energy.
A plurality of output detection circuits for detecting physical quantities related to energy generated in a treatment section for treating a subject;
An output control circuit that controls the energy according to the physical quantity detected by each of the plurality of output detection circuits;
A main control circuit for controlling the output control circuit;
Comprising
The output control circuit has a plurality of separated circuit regions,
Each said circuit area is
An output acquisition circuit for acquiring a value of the physical quantity detected by the corresponding output detection circuit;
An error detection circuit that detects a failure and notifies an error according to the presence or absence of a difference between the values of the physical quantities acquired by the output acquisition circuit included in each of the circuit areas; and
A communication circuit for communicating information with the main control circuit;
Including
Any one of the circuit regions generates the energy according to a comparison result between the physical quantity value acquired by the output acquisition circuit and a target value input from the main control circuit via the communication circuit. An output generation circuit for generating power for
The communication circuit communicates the error notification from the error detection circuit to the main control circuit, and communicates the target value from the main control circuit to the output generation circuit.
Power supply.
An output control circuit that controls the energy in accordance with the physical quantity detected by each of a plurality of output detection circuits that detect a physical quantity related to energy generated in a treatment unit that treats a subject,
The output control circuit has a plurality of separated circuit regions,
Each said circuit area is
An output acquisition circuit for acquiring a value of the physical quantity detected by the corresponding output detection circuit;
An error detection circuit that detects a failure and notifies an error according to the presence or absence of a difference between the values of the physical quantities acquired by the output acquisition circuit included in each of the circuit areas; and
A communication circuit that communicates information with a main control circuit that controls the output control circuit;
Including
Any one of the circuit regions generates the energy according to a comparison result between the physical quantity value acquired by the output acquisition circuit and a target value input from the main control circuit via the communication circuit. An output generation circuit for generating power for
The communication circuit communicates the error notification from the error detection circuit to the main control circuit, and communicates the target value from the main control circuit to the output generation circuit.
Output control circuit.