Control circuit of capsule endoscope system

Abstract

The utility model provides a control circuit of a capsule endoscope system, which comprises a protection unit and a working unit, two ends of the protection unit are respectively connected with a power supply and the working unit, and the protection unit comprises a fuse, a leakage protection switch, a reactor, a filter and an isolation transformer which are connected in series. The reactor is closer to the power supply than the isolation transformer. According to the control circuit of the capsule endoscope system, the safety of the control circuit can be improved.

Description

Technical Field

[0001] The utility model relates to the field of biomedical engineering industry, in particular to a control circuit of a capsule endoscope system. Background Art

[0002] A capsule-shaped capsule endoscope is a medical device used to diagnose gastrointestinal diseases. The patient swallows the capsule endoscope, allowing it to enter the body. The capsule endoscope, equipped with a built-in high-definition camera, captures and transmits real-time images of the patient's body, assisting doctors in diagnosing conditions such as ulcers, polyps, and inflammation.

[0003] Capsule endoscopes typically have a built-in magnet. Doctors use a control device with a magnet outside the patient's body to control the movement of the capsule endoscope inside the patient's body, obtaining a more comprehensive image of the body. To more precisely control the movement of the capsule endoscope within the patient's body, the capsule endoscope system typically controls the movement of the magnet using a motor.

[0004] However, capsule endoscopy systems are usually large electrical devices with heavy loads and high power consumption during operation. Excessive current or voltage may damage the electronic components in the capsule endoscopy system, posing certain safety risks. Summary of the Invention

[0005] The present invention is proposed in view of the above-mentioned prior art situation, and its object is to provide a control circuit of a capsule endoscope system capable of improving the safety of the control circuit.

[0006] To this end, the utility model provides a control circuit of a capsule endoscope system, including a protection unit and a working unit, wherein the two ends of the protection unit are respectively connected to a power supply and the working unit, wherein the protection unit includes a fuse, a leakage protection switch, an inductor, a filter, and an isolation transformer arranged in series, and the inductor is closer to the power supply than the isolation transformer.

[0007] In the present invention, by setting a fuse in series, overcurrent protection can be provided for the control circuit; by setting a leakage protection switch in series, overcurrent and overvoltage protection can be provided for the control circuit; by setting a reactor in series, filtering protection can be provided for the control circuit; by setting a filter in series, filtering protection can be provided for the control circuit; and by setting an isolation transformer in series, overvoltage and filtering protection can be provided for the control circuit. In addition, the working unit is connected to the power supply through the protection unit, which can reduce the risk of surge current and surge voltage from the power supply damaging the working unit, thereby improving the safety of the control circuit. In addition, by placing the reactor closer to the power supply than the isolation transformer, the reactor can be used to suppress the surge current, thereby reducing the impact of the surge current on the isolation transformer.

[0008] Additionally, in the control circuit of the present invention, the fuse, the leakage protection switch, the reactor, the filter, and the isolation transformer may be optionally connected in series. In this case, since current flows sequentially through the fuse, leakage protection switch, reactor, filter, and isolation transformer, the fuse or leakage protection switch can immediately disconnect the control circuit when an overcurrent or leakage occurs. The reactor and filter suppress inrush current and filter out interference, thereby reducing the impact of inrush current and interference on the isolation transformer.

[0009] In the control circuit of the present invention, optionally, two fuses are provided, each connected to one end of the isolation transformer. In this case, if one fuse fails to blow, the other fuse can still provide overcurrent protection for the control circuit, further improving the safety of the control circuit. Furthermore, if a fault occurs, checking the blowing status of both fuses facilitates troubleshooting.

[0010] In addition, in the control circuit of the present invention, the isolation transformer can optionally be floated relative to the ground. In this case, the potential difference between the isolation transformer and the ground can be reduced, and when the control circuit is accidentally touched, the current flowing through the human body is reduced, thereby reducing the risk of electric shock.

[0011] Additionally, in the control circuit of the present invention, the working unit may optionally include an operating module and a motion module, with the operating module and the motion module being disposed on separate branches of the isolation transformer. In this case, placing the operating module and the motion module on separate branches allows the working unit to function normally even if one module fails, thereby improving the overall stability of the working unit.

[0012] In addition, in the control circuit of the present invention, the working unit may optionally include an input filter connected in series with the motion module. In this case, by connecting the input filter and the motion module in series, interference in the current input to the motion module can be filtered out, thereby improving the accuracy of control over the motion module.

[0013] Additionally, in the control circuit of the present invention, the working unit may optionally include an AC contactor disposed on the branch circuit where the motion module is located. In this case, the AC contactor controls the on / off switching of the motion module, thereby providing low-voltage protection for the motion module and reducing the risk of damage to the motion module due to low voltage, thereby improving the safety of the control circuit.

[0014] Additionally, in the control circuit of the present invention, the operating unit may optionally further include a first arc extinguisher connected in parallel with the main contacts of the AC contactor. In this case, the first arc extinguisher eliminates sparks generated by the contact operation of the AC contactor, thereby reducing the risk of spark damage to electronic components and improving the safety of the control circuit.

[0015] Additionally, in the control circuit of the present invention, the operating unit may optionally further include a second arc extinguisher connected in parallel with the coil of the AC contactor. In this case, since the coil generates a large self-induced electromotive force when in operation, the second arc extinguisher eliminates the spark generated by the self-induced electromotive force, thereby reducing the risk of spark damage to electronic components and improving the safety of the control circuit.

[0016] In addition, in the control circuit of the present invention, the working unit may optionally further include an emergency stop switch connected in series with the coil of the AC contactor. In this case, when a fault occurs in the control circuit, the emergency stop switch can more quickly disconnect the control circuit, thereby helping to ensure the safety of personnel during troubleshooting.

[0017] According to the present invention, a control circuit of a capsule endoscope system can be provided, which improves the safety of the control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be explained in further detail, by way of example only, with reference to the accompanying drawings.

[0019] Figure 1 2 is a diagram showing an application scenario of the capsule endoscope system involved in the example of the present utility model.

[0020] Figure 2 1 is a connection diagram showing a capsule endoscope system according to an example of the present invention.

[0021] Figure 3 2 is a block diagram showing a protection unit according to an example of the present invention.

[0022] Figure 4 1 is a circuit diagram showing a protection unit according to an example of the present invention.

[0023] Figure 5 It is a block diagram showing the working units involved in the example of the present invention.

[0024] Figure 6 1 is a circuit diagram showing an operating unit according to an example of the present invention.

[0025] Figure 7 1 is a circuit diagram showing a control circuit according to an example of the present invention.

[0026] Description of reference numerals:

[0027] 100…Capsule endoscopy system, 1…Capsule endoscope, 2…Operation terminal, 3…Motion terminal, 4…Power supply, 5…Control circuit, 51…Protection unit, 511…Isolation transformer, 512…Fuse, 512a…First fuse, 512b…Second fuse, 513…Reactor, 514…Leakage protection switch, 515…Filter, 516…Third arc extinguisher, 52…Working unit, 521…Operation module, 522…Motion module, 523…AC contactor, 5231…Main contact, 5232…Start switch, 5233…Stop switch, 5234…Auxiliary contact, 5235…Coil, 524…Emergency stop switch, 525…Input filter, 526…First arc extinguisher, 527…Second arc extinguisher, 53…Main switch, 200…Examinee DETAILED DESCRIPTION

[0028] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. In the following description, identical components will be assigned identical reference numerals, and duplicate descriptions will be omitted. In addition, the accompanying drawings are merely schematic, and the proportions of the dimensions of the components or the shapes of the components may differ from the actual ones.

[0029] It should be noted that the terms "include" and "have" and any variations thereof in the present invention, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0030] It should be noted that, in this article, relative position and relative direction terms such as "above", "towards above", "below", "towards downward", "up and down direction", "left side", "towards the left side", "left direction", "towards the left", "right side", "towards the right side", "right side", "towards the right", "left and right direction", "front", "towards the front", "back", "towards the back", "front and back direction" are with reference to the normal operating posture and should not be considered as restrictive.

[0031] First, the relevant terms involved in this utility model are introduced.

[0032] "Providing overcurrent protection" may mean preventing excessive current from damaging or affecting a circuit.

[0033] "Providing overvoltage protection" can mean preventing excessive voltage from damaging or affecting a circuit.

[0034] “Providing filtering protection” may refer to preventing interference (such as current interference, voltage interference, etc.) from affecting the circuit or affecting the accuracy of the control of the control circuit.

[0035] "Contact action" may refer to the closing or opening of the contacts of an AC contactor.

[0036] "Coil actuation" may mean that the coil begins to be energized or begins to be de-energized.

[0037] The control circuit of the capsule endoscope system of the present invention can provide multi-level overcurrent protection, overvoltage protection, and filtering protection, thereby improving the safety of the control circuit. In some examples, the control circuit of the capsule endoscope system of the present invention can also be referred to as a control circuit, a protection circuit of the capsule endoscope system, a circuit of a capsule endoscope console, a circuit of a system for controlling a capsule endoscope, a circuit system of a capsule endoscope posture controller, or a protection circuit of a capsule endoscope posture controller.

[0038] In some examples, the capsule endoscope may also be referred to as a capsule endoscope, a capsule-type endoscope, or a capsule-type endoscope. In some examples, the capsule endoscope may enter the body of a subject, for example, the capsule endoscope may enter the digestive cavity of the subject.

[0039] The control circuit of the capsule endoscope system according to the present invention (hereinafter referred to as the control circuit) will be described in detail below with reference to the accompanying drawings.

[0040] Figure 1 2 is a diagram showing an application scenario of the capsule endoscope system 100 according to an example of the present invention. Figure 2 FIG. 1 is a connection diagram illustrating a capsule endoscope system 100 according to an example of the present invention.

[0041] In some examples, the capsule endoscopy system 100 may include a capsule endoscope 1 (see Figure 1 In some examples, the capsule endoscope 1 may be formed as a capsule-shaped device that can be introduced into the subject 200. In some examples, the capsule endoscope 1 may be used to obtain the health status of the subject 200.

[0042] For some examples, see Figure 2 The capsule endoscopy system 100 may include an operation terminal 2 and a motion terminal 3. In some examples, the operation terminal 2 may be used to control the motion terminal 3. For example, an operator may control the motion terminal 3 by operating the operation terminal 2.

[0043] In some examples, the operation terminal 2 may be a computer, and the motion terminal 3 may be a drive motor.

[0044] For some examples, see Figure 1 or Figure 2 The motion terminal 3 can be used to control the movement of the capsule endoscope 1 in the body of the subject 200.

[0045] In some examples, the capsule endoscope 1 may include a magnet, and the motion terminal 3 may generate a variable magnetic field and exert a magnetic force on the magnet of the capsule endoscope 1 , thereby controlling the movement of the capsule endoscope 1 .

[0046] In some examples, the capsule endoscopy system 100 may include a power source 4 (see Figure 2 In some examples, the power supply 4 can be used to provide power to the operation terminal 2, the motion terminal 3, and the control circuit 5 of the capsule endoscopy system 100. In some examples, the power supply 4 can be an AC power supply.

[0047] For some examples, see Figure 2 The capsule endoscopy system 100 may further include a control circuit 5. In some examples, the control circuit 5 may be used to control the operation terminal 2 and the motion terminal 3.

[0048] In some examples, the control circuit 5 may include a protection unit 51 (see Figure 2 In some examples, the protection unit 51 may be used to protect electronic components in the control circuit 5 .

[0049] In some examples, the control circuit 5 may include a working unit 52 (see Figure 2 In some examples, the working unit 52 can be used to control the operation terminal 2 and the motion terminal 3 .

[0050] For some examples, see Figure 2 , the control circuit 5 may include a main switch 53. In some examples, the main switch 53 may be used to switch the control circuit 5. In some examples, the main switch 53 may be connected to the power supply 4.

[0051] In some examples, the protection unit 51 can be used to protect the working unit 52. This can reduce the risk of the working unit 52 being damaged.

[0052] For some examples, see Figure 2 , the protection unit 51 can be connected to the power source 4. In some examples, the protection unit 51 can be connected to the power source 4 through a main switch 53.

[0053] For some examples, see Figure 2, the two ends of the protection unit 51 can be connected to the power supply 4 and the working unit 52 respectively. In this case, the working unit 52 is connected to the power supply 4 through the protection unit 51, which can reduce the risk of surge current and surge voltage from the power supply 4 damaging the working unit 52, thereby improving the safety of the control circuit 5.

[0054] For some examples, see Figure 2 , the working unit 52 can be connected to the power supply 4. In some examples, the working unit 52 can be connected to the power supply 4 through the protection unit 51.

[0055] Figure 3 1 is a block diagram showing a protection unit 51 according to an example of the present invention. Figure 4 1 is a circuit diagram showing a protection unit 51 according to an example of the present invention.

[0056] For some examples, see Figure 3 , the protection unit 51 may include an isolation transformer 511. In this case, since the isolation transformer 511 is an inductive electronic component, the isolation transformer 511 suppresses surge voltage, and the protection unit 51 can provide overvoltage protection for the control circuit 5.

[0057] In some examples, the isolation transformer 511 may include an iron core. In this case, the iron core absorbs high-frequency noise, and the protection unit 51 can provide filtering protection for the control circuit 5, thereby improving the control accuracy of the control circuit 5.

[0058] In some examples, the isolation transformer 511 can be floated relative to the ground. In this case, the potential difference between the isolation transformer 511 and the ground can be reduced, and when the control circuit 5 is accidentally touched, the current flowing through the human body is reduced, thereby reducing the risk of electric shock.

[0059] In some examples, the input and output terminals, or the output terminals, of the isolation transformer 511 are floating relative to the ground. In this case, since the input and output terminals of the isolation transformer 511 are coupled to each other via a magnetic field, floating the input and output terminals, or the output terminals, relative to the ground facilitates floating the isolation transformer 511 relative to the ground.

[0060] In some examples, a floating isolation transformer 511 can isolate leakage current. In this case, since electronic components may generate a certain amount of leakage current to the ground, the combined leakage current of multiple electronic components may exceed the safety limit of the leakage current. Floating the isolation transformer 511 can help prevent the leakage current from flowing into the isolation transformer 511.

[0061] For some examples, see Figure 3 or Figure 4, the protection unit 51 may include a fuse 512. In this case, when a short circuit or overcurrent occurs in the control circuit 5, the fuse 512 is melted to disconnect the control circuit 5, and the protection unit 51 can provide overcurrent protection for the control circuit 5.

[0062] For some examples, see Figure 4 , there can be two fuses 512. In this case, when one of the fuses 512 fails and cannot be blown, the other fuse 512 can still provide overcurrent protection for the control circuit 5, thereby improving the stability of the control circuit 5.

[0063] For some examples, see Figure 4 , the fuse 512 may include a first fuse 512a and a second fuse 512b.

[0064] For some examples, see Figure 4 , two fuses 512 can be connected to the two ends of the isolation transformer 511, respectively. In some examples, the two fuses 512 can be connected to the input and output ends of the isolation transformer 511, respectively. In this case, when a fault occurs, checking the fusing status of the two fuses 512 can facilitate troubleshooting of the fault location. For example, if the first fuse 512a near the input end of the isolation transformer 511 is blown, while the second fuse 512b near the output end of the isolation transformer 511 is not blown, it can be preliminarily determined that the fault is located near the input end of the isolation transformer 511.

[0065] For some examples, see Figure 3 or Figure 4 , the protection unit 51 may include a reactor 513. In this case, the reactor 513 suppresses surge current and filters out interference, and the protection unit 51 can provide overcurrent protection and filtering protection for the control circuit 5.

[0066] For some examples, see Figure 4 , the reactor 513 can be closer to the power source 4 than the isolation transformer 511. Therefore, the reactor 513 can be used to suppress the surge current, thereby reducing the impact of the surge current on the isolation transformer 511.

[0067] For some examples, see Figure 3 or Figure 4, the protection unit 51 may include a leakage protection switch 514. In this case, when a leakage occurs in the control circuit 5, the leakage protection switch 514 automatically opens, thereby disconnecting the control circuit 5, thereby reducing the risk of electric shock. In addition, by combining the leakage protection switch 514 with other protective electronic components (such as a fuse 512, a reactor 513, etc.), when the other protective electronic components detect an overcurrent or overvoltage in the control circuit 5, the leakage protection switch 514 automatically opens, thereby enabling the protection unit 51 to provide overcurrent and overvoltage protection for the control circuit 5.

[0068] For some examples, see Figure 3 or Figure 4 , the protection unit 51 may include a filter 515. In this case, the filter 515 filters out interference in the current, and the protection unit 51 can provide filtering protection for the control circuit 5.

[0069] For some examples, see Figure 4 The protection unit 51 may include a fuse 512, a leakage protection switch 514, a reactor 513, a filter 515, and an isolation transformer 511. In some examples, the fuse 512, the leakage protection switch 514, the reactor 513, the filter 515, and the isolation transformer 511 may be arranged in series. In this case, by arranging the fuse 512 in series, overcurrent protection can be provided for the control circuit 5; by arranging the leakage protection switch 514 in series, overcurrent and overvoltage protection can be provided for the control circuit 5; by arranging the reactor 513 in series, filtering protection can be provided for the control circuit 5; by arranging the filter 515 in series, filtering protection can be provided for the control circuit 5; and by arranging the isolation transformer 511 in series, overvoltage and filtering protection can be provided for the control circuit 5.

[0070] For some examples, see Figure 4 , the fuse 512, leakage protection switch 514, reactor 513, filter 515, and isolation transformer 511 can be connected in series. In this case, since the current flows through the fuse 512, leakage protection switch 514, reactor 513, filter 515, and isolation transformer 511 in sequence, when an overcurrent or leakage occurs, the fuse 512 or leakage protection switch 514 can immediately disconnect the control circuit 5; the reactor 513 and filter 515 suppress the inrush current and filter out interference, which can reduce the impact of the inrush current and interference on the isolation transformer 511.

[0071] In some examples, the protection unit 51 may further include a third arc extinguisher 516 (see Figure 3 or Figure 4In some examples, the third arc extinguisher 516 can also be referred to as an arc extinguishing device. In some examples, the third arc extinguisher 516 can be connected in parallel with the main switch 53. This allows the third arc extinguisher 516 to eliminate sparks generated by the contact movement of the main switch 53, reducing the risk of spark damage to electronic components. Furthermore, eliminating sparks can reduce the impact of sparks on the lifespan of electronic components.

[0072] Figure 5 1 is a block diagram showing the operation unit 52 according to an example of the present invention. Figure 6 1 is a circuit diagram showing an operating unit 52 according to an example of the present invention.

[0073] For some examples, see Figure 5 or Figure 6 , the working unit 52 may include an operation module 521. In some examples, the working unit 52 may include a motion module 522.

[0074] In some examples, the operation module 521 of the working unit 52 can be used to control the operation terminal 2. In some examples, the motion module 522 of the working unit 52 can be used to control the motion terminal 3. In some examples, the operation module 521 can be located inside the operation terminal 2, that is, the operation module 521 can be the portion of the control circuit 5 located in the operation terminal 2. In some examples, the motion module 522 can be located inside the motion terminal 3, that is, the motion module 522 can be the portion of the control circuit 5 located in the motion terminal 3.

[0075] In some examples, the operation module 521 can be connected to the motion module 522 , so that the motion terminal 3 can be controlled by the operation terminal 2 .

[0076] For some examples, see Figure 6 The working unit 52 may include an AC contactor 523. In some examples, the AC contactor 523 may be disposed on a branch circuit where the motion module 522 is located. In some examples, the AC contactor 523 may be connected to the motion module 522. In this case, the AC contactor 523 controls the conduction and disconnection of the motion module 522, thereby providing low-voltage protection for the motion module 522 and reducing the risk of low-voltage damage to the motion module 522, thereby improving the safety of the control circuit 5.

[0077] In some examples, the AC contactor 523 may include a main contact 5231, a start switch 5232, a stop switch 5233, and an auxiliary contact 5234 (see Figure 6In some examples, the start switch 5232 may be a normally open switch, the stop switch 5233 may be a normally closed switch, and the auxiliary contact 5234 may be a normally open contact. In some examples, the auxiliary contact 5234 may be connected in parallel with the start switch 5232. In some examples, the AC contactor 523 may further include a coil 5235 (see Figure 6 ).

[0078] In some examples, the main contact 5231 can be used to open or close the branch circuit where the motion module 522 is located. In some examples, the start switch 5232 can be used to start the motion module 522. In some examples, the stop switch 5233 can be used to open the circuit to de-energize the coil 5235, thereby stopping the motion module 522. In some examples, the auxiliary contact 5234 can remain closed to connect the circuit when the coil 5235 is energized.

[0079] In some examples, the coil 5235 can be a pull-in coil. In some examples, the start switch 5232 can be pressed to energize the coil 5235. The coil 5235 generates a magnetic field, which attracts the main contact 5231 and the auxiliary contact 5234 to close. Since the auxiliary contact 5234 is connected in parallel with the start switch 5232, after the start switch 5232 is released, current can flow into the coil 5235 through the closed auxiliary contact 5234. The AC contactor 5233 remains conductive as a whole, thereby achieving self-locking and energizing the motion module 522. When the machine needs to be shut down, the stop switch 5233 is pressed to de-energize the coil 5235. After the magnetic field disappears, the main contact 5231 and the auxiliary contact 5234 are no longer attracted and are disconnected, thereby completing the shutdown.

[0080] For some examples, see Figure 6 The working unit 52 may further include an emergency stop switch 524. In some examples, the emergency stop switch 524 can be used to urgently stop the motion module 522. In some examples, the emergency stop switch 524 can be connected in series with the coil 5235 of the AC contactor 523. In this case, when a fault occurs in the control circuit 5, the emergency stop switch 524 can more quickly disconnect the control circuit 5, thereby helping to ensure personnel safety during troubleshooting.

[0081] In some examples, the emergency stop switch 524 can be a self-locking switch. That is, the emergency stop switch 524 can remain in the open state after being opened. In this case, since the emergency stop switch 524 must be manually closed after opening, the emergency stop switch 524 remains in the open state until the troubleshooting is completed, which can further ensure the safety of personnel during the troubleshooting.

[0082] For some examples, see Figure 6The working unit 52 may include an input filter 525. In some examples, the input filter 525 may be connected in series with the motion module 522. In this case, by connecting the input filter 525 and the motion module 522 in series, interference in the current input to the motion module 522 can be filtered out, thereby improving the accuracy of controlling the motion module 522.

[0083] In some examples, the working unit 52 may include a shielding case (not shown), and the motion module 522 may be disposed within the shielding case. In some examples, an input filter 525 connected in series with the motion module 522 may be disposed at a current input port of the motion module 522 on the shielding case.

[0084] For some examples, see Figure 7 The working unit 52 may further include a first arc extinguisher 526. In some examples, the first arc extinguisher 526 may be connected in parallel with the main contact 5231 of the AC contactor 523. In this case, the first arc extinguisher 526 eliminates sparks generated by the contact movement of the AC contactor 523, thereby reducing the risk of sparks damaging electronic components and improving the safety of the control circuit 5.

[0085] For some examples, see Figure 7 The working unit 52 may further include a second arc extinguisher 527. In some examples, the second arc extinguisher 527 may be connected in parallel with the coil 5235 of the AC contactor 523. In this case, since the coil 5235 generates a large self-induced electromotive force when in operation, the second arc extinguisher 527 eliminates the sparks generated by the self-induced electromotive force, thereby reducing the risk of sparks damaging electronic components and improving the safety of the control circuit 5.

[0086] Figure 7 1 is a circuit diagram showing a control circuit 5 according to an example of the present invention.

[0087] As described above, the operation module 521 and the movement module 522 can be respectively arranged on two branches. Figure 7 , the isolation transformer 511 may include two branches. In some examples, the operation module 521 and the motion module 522 may be respectively arranged on two branches of the isolation transformer 511. In this case, placing the operation module 521 and the motion module 522 on independent branches respectively enables the other module to still operate normally when any module fails, thereby improving the overall stability of the working unit 52. For example, when the motion module 522 fails and stops in an emergency, the operation module 521 can still be controlled, which helps to prevent data loss. For another example, when the operation module 521 crashes, the motion module 522 can still be stopped in an emergency, preventing the emergency stop from failing due to the crash of the operation module 521, thereby improving the safety of the control circuit 5.

[0088] In some examples, the main switch 53, the first fuse 512a, the leakage protection switch 514, the reactor 513, the filter 515, the isolation transformer 511, and the second fuse 512b can be connected in series in sequence. Thus, the first fuse 512a can provide primary overcurrent protection for the control circuit 5, the leakage protection switch 514 can provide secondary overcurrent protection and primary overvoltage protection for the control circuit 5, the reactor 513 can provide primary filtering protection for the control circuit 5, the filter 515 can provide secondary filtering protection for the control circuit 5, the isolation transformer 511 can provide secondary overvoltage protection and tertiary filtering protection for the control circuit 5, and the fuse 512b can provide tertiary overcurrent protection for the control circuit 5.

[0089] For some examples, see Figure 7 The second fuse 512b, the AC contactor 523, the input filter 525, and the motion module 522 can be connected in series in sequence. Thus, the input filter 525 can provide four-level filtering protection for the control circuit 5.

[0090] In the present invention, by setting a fuse 512 in series, overcurrent protection can be provided for the control circuit 5; by setting a leakage protection switch 514 in series, overcurrent and overvoltage protection can be provided for the control circuit 5; by setting a reactor 513 in series, filtering protection can be provided for the control circuit 5; by setting a filter 515 in series, filtering protection can be provided for the control circuit 5; and by setting an isolation transformer 511 in series, overvoltage and filtering protection can be provided for the control circuit 5. In addition, the working unit 52 is connected to the power supply 4 through the protection unit 51, which can reduce the risk of surge current and surge voltage from the power supply 4 damaging the working unit 52, thereby improving the safety of the control circuit 5. In addition, by placing the reactor 513 closer to the power supply 4 than the isolation transformer 511, the reactor 513 can be used to suppress the surge current, thereby reducing the impact of the surge current on the isolation transformer 511.

[0091] In summary, according to the present invention, it is possible to provide a control circuit 5 of a capsule endoscope system 100 that improves the safety of the control circuit 5 .

[0092] Although the present invention has been described in detail above with reference to the accompanying drawings and examples, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art may modify and alter the present invention as needed without departing from the spirit and scope of the present invention, and such modifications and alterations are intended to fall within the scope of the present invention.

Claims

1. A control circuit for a capsule endoscope system, characterized in that: It includes a protection unit and a working unit, wherein the two ends of the protection unit are respectively connected to the power supply and the working unit, wherein the protection unit includes a fuse, a leakage protection switch, a reactor, a filter, and an isolation transformer arranged in series, and the reactor is closer to the power supply than the isolation transformer.

2. The control circuit of the capsule endoscope system according to claim 1, characterized in that: The fuse, the leakage protection switch, the reactor, the filter, and the isolation transformer are connected in series in sequence.

3. The control circuit of the capsule endoscope system according to claim 1, wherein: There are two fuses, and the two fuses are respectively connected to the two ends of the isolation transformer.

4. The control circuit of the capsule endoscope system according to claim 1, wherein: The isolation transformer is floating relative to the ground.

5. The control circuit of the capsule endoscope system according to claim 1, wherein: The working unit includes an operating module and a motion module, and the operating module and the motion module are respectively arranged on two branches of the isolation transformer.

6. The control circuit of the capsule endoscope system according to claim 5, characterized in that: The working unit includes an input filter connected in series with the motion module.

7. The control circuit of the capsule endoscope system according to claim 5, characterized in that: The working unit includes an AC contactor, which is arranged on the branch where the motion module is located.

8. The control circuit of the capsule endoscope system according to claim 7, characterized in that: The working unit further includes a first arc extinguisher connected in parallel with the main contacts of the AC contactor.

9. The control circuit of the capsule endoscope system according to claim 7, characterized in that: The working unit further includes a second arc extinguisher connected in parallel with the coil of the AC contactor.

10. The control circuit of the capsule endoscope system according to claim 7, characterized in that: The working unit further includes an emergency stop switch, which is connected in series with the coil of the AC contactor.

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