Endoscope water pump electronic system

Abstract

The utility model relates to the technical field of endoscopes, and discloses an endoscope water pump electronic system which comprises a controller, a flow sensor, a man-machine interaction device and a water pump. The controller comprises a master control integrated circuit and a PID control circuit. The flow sensor is located in the water supply pipe, the flow sensor is in communication connection with the PID control circuit, and the flow sensor is used for collecting a flow output signal of the output flow of the water pump and feeding back the flow output signal to the PID control circuit; the man-machine interaction device is used for sending a flow electric signal to the master control integrated circuit, the master control integrated circuit is used for forwarding the flow electric signal to the PID control circuit, the PID control circuit forwards the flow electric signal to the water pump, and the water pump output flow is obtained; and the PID control circuit is used for stably adjusting the flow electric signal according to the flow output signal. Stable output of the flow speed of the whole water pump can be kept, and the danger affecting the safety of a patient is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope water pump electronic system. Background Art

[0002] During the diagnosis and treatment process, endoscopes may encounter interferences such as blood, tissue, and feces, which hinder the operator's observation and diagnosis of the patient. As a water delivery device, the endoscope water pump can flush out interferences such as blood and tissue during the endoscopic diagnosis and treatment process, thereby improving the accuracy of the diagnosis. However, during the use of the water pump, the flow rate of the water pump may be unstable due to external interference, resulting in a high flow rate. If medical staff fail to discover it in time, the safety of the patient cannot be guaranteed. Utility Model Content

[0003] In view of this, the utility model provides an endoscope water pump electronic system to solve the problem of unstable flow rate of the water pump.

[0004] In the first aspect, the utility model provides an endoscope water pump electronic system, comprising: a controller, a flow sensor, a human-computer interaction device and a water pump; the controller comprises a main control integrated circuit and a PID control circuit; the flow sensor is located in a water supply pipe, one end of the water supply pipe is sleeved on the pump head of the water pump, and the other end of the water supply pipe is connected to the endoscope forceps pipeline, the flow sensor is communicatively connected to the PID control circuit, the flow sensor is used to collect a flow output signal of the water pump output flow, and feed the flow output signal back to the PID control circuit; the human-computer interaction device is communicatively connected to the main control integrated circuit, the human-computer interaction device is used to send a flow electrical signal to the main control integrated circuit, the main control integrated circuit is used to forward the flow electrical signal to the PID control circuit, the PID control circuit forwards the flow electrical signal to the water pump to obtain the water pump output flow; the PID control circuit is used to stably adjust the flow electrical signal according to the flow output signal, and send the obtained adjustment electrical signal to the water pump to keep the water pump output flow stable.

[0005] In some embodiments, the human-machine interaction device includes a human-machine interaction face screen and a foot controller; the human-machine interaction face screen and the foot controller are both communicatively connected to the main control integrated circuit, and the flow sensor is also communicatively connected to the main control integrated circuit to feed back the flow output signal to the main control integrated circuit; the human-machine interaction face screen is used to display the flow output signal received by the main control integrated circuit, and the foot controller is used to input the flow electrical signal.

[0006] In some embodiments, a pump head detection sensor is further included, wherein the pump head detection sensor is installed at the pump head of the water pump, and the pump head detection sensor is communicatively connected with the main control integrated circuit.

[0007] In some embodiments, the pump head detection sensor is a vibration sensor.

[0008] In some embodiments, the pump head detection sensor includes two metal contacts, one of which contacts the pump head and the other contacts the pump port, and the pump port is the interface on the water pump for mounting the pump head; the two metal contacts are not connected to each other, and one of the two metal contacts is connected to the positive pole of the power supply provided by the main control integrated circuit, and the other is connected to the negative pole of the power supply provided by the main control integrated circuit; the pump port and the pump head are made of metal; the pump head detection pin of the main control integrated circuit is connected to one of the metal contacts.

[0009] In some implementations, an alarm device is further included, and the alarm device is connected to the main control integrated circuit.

[0010] In some embodiments, a hardware protection circuit is further included, and the hardware protection circuit is communicatively connected to the PID control circuit to limit the flow electrical signal output by the PID control circuit.

[0011] In some embodiments, the hardware protection circuit includes: a voltage follower, a D flip-flop and a transistor; the first input terminal and the second input terminal of the voltage follower are respectively used to receive the flow electrical signal sent by the PID control circuit and the first threshold voltage signal sent by the main control integrated circuit, the output terminal of the voltage follower is connected to the input terminal of the D flip-flop, the output terminal of the D flip-flop is connected to the enable terminal of the transistor, the input terminal of the transistor is connected to the output terminal of the PID control circuit, and the output terminal of the transistor is grounded.

[0012] In some embodiments, the endoscope water pump electronic system also includes: a power-off comparator and a power-off protector, wherein the power-off protector is connected between the main control integrated circuit and an external power supply, the enable end of the power-off protector is connected to the output end of the power-off comparator, and the input end of the power-off comparator respectively receives the second threshold voltage signal sent by the main control integrated circuit and the flow electrical signal sent by the PID control circuit.

[0013] In some embodiments, the alarm device is a buzzer.

[0014] The technical solution provided by the utility model has the following advantages:

[0015] The technical solution provided by the utility model mainly includes a controller, a flow sensor, a human-machine interaction device and a water pump, wherein the controller includes a main control integrated circuit and a PID control circuit, the human-machine interaction device is used to receive the flow electrical signal input by the user, the main control integrated circuit is the main control chip that controls the start or shut down of the endoscope water pump, and after the flow electrical signal is forwarded to the main control integrated circuit by the human-machine interaction device, the main control integrated circuit forwards the flow electrical signal to the PID control circuit, and the PID control circuit outputs a signal to the water pump to control the running speed of the water pump stepper motor, thereby controlling the flow of the water pump. At the same time, during the operation of the endoscope water pump, the flow sensor in the water supply pipe can feed back the flow signal to the PID control circuit, and the PID control circuit adjusts the flow electrical signal through the internal proportional, integral, and differential circuits, so that the input and output are consistent, and the overall water pump flow rate is kept stable Output, to avoid the danger of affecting patient safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0018] Figure 2 is a schematic diagram of a human-computer interaction device according to an embodiment of the utility model;

[0019] Figure 3 is another schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0020] Figure 4 is another schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0021] Figure 5 is another schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0022] Figure 6 is another schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0023] Figure 7 is another schematic diagram of an endoscope water pump electronic system according to an embodiment of the utility model;

[0024] Figure numerals: main control integrated circuit A1, PID control circuit A2, flow sensor A3, human-computer interaction device A4, water pump A5, human-computer interaction panel A6, foot controller A7, pump head detection sensor A8, alarm device A9, hardware protection circuit A10, voltage follower A11, D trigger A12, transistor A13, power-off comparator A14, power-off protector A15, first metal antenna A81, second metal antenna A82, pump port A51, pump head A52. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "abutment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1As shown, an endoscope water pump electronic system provided by the utility model includes: a controller, a flow sensor A3, a human-computer interaction device A4 and a water pump A5, wherein the controller specifically includes a main control integrated circuit A1 and a PID control circuit A2. In some embodiments, the liquid flowing out of the water pump A5 is not limited to water, but can also be other liquids required for the endoscope to work, such as physiological saline, functional liquid, etc. The form of the water pump A5 is not limited to a traditional water pump, and other devices that can meet the flow demand can also be applicable.

[0029] In the embodiment of the utility model, the main control integrated circuit A1 can be a central processing unit, a network processor or a combination thereof. The main control integrated circuit A1 can be a dedicated integrated circuit, a programmable logic device or a combination thereof. The above-mentioned programmable logic device can be a complex programmable logic device, a field programmable logic gate array, a general array logic or any combination thereof. For example, the main control integrated circuit A1 can adopt an ARM series embedded processor.

[0030] PID control circuit A2 is a collection of proportional circuits, integral circuits, and differential circuits composed of multiple operational amplifiers. PID control circuit A2 is a regulating circuit that keeps the output electrical signal stable and consistent with the input electrical signal based on the feedback of the output electrical signal. The specific principles of the proportional circuit, integral circuit, and differential circuit in PID control circuit A2 are prior art and will not be described in detail in the embodiments of the utility model. Since the control quantity required for the stepper motor of water pump A5 to execute is an increment rather than a position quantity, and the incremental PID has a smaller impact of malfunction when a fault occurs, the embodiment of the utility model adopts an incremental PID control circuit to control the stepper motor. Regarding the incremental PID control circuit that integrates the proportional link, integral link, and differential link, the relationship between the previous output signal and the next output signal can be expressed as follows:

[0031] Δu k =u k -u k-1 =K p [e k -e k-1 ]+K i *e k +K d (e k -2e k-1 +e k-2 )

[0032] in:

[0033] Δu k : Output signal adjustment increment

[0034] k: sampling number

[0035] uk : kth sampling output signal

[0036] u k-1 : k-1th sampling output signal

[0037] e k : Deviation value input at the kth sampling moment

[0038] e k-1 : Deviation value input at the k-1th sampling time

[0039] e k-2 : Deviation value input at the k-2th sampling time

[0040] K i :Integral coefficient

[0041] K d : Differential coefficient

[0042] K p : Proportional coefficient

[0043] Among them, one end of the water supply pipe of the endoscope water pump device is sleeved on the pump head of the water pump A5, and the other end is connected to the endoscope forceps pipeline, so that the water pump A5 sends water into the endoscope forceps pipeline to facilitate flushing the patient's body. The flow sensor A3 provided in the embodiment of the utility model is located in the water supply pipe, and the flow sensor A3 is provided to communicate with the PID control circuit A2. The flow sensor A3 is used to collect the flow output signal of the output flow of the water pump A5, and feed the flow output signal back to the PID control circuit A2.

[0044] When the endoscope water pump device is working, the human-machine interaction device A4 first receives the flow rate electrical signal input by the user, for example, converts the digital symbols or other symbols input by the user representing the flow rate into the corresponding electrical signal. It should be noted that the process of converting the digital symbols or other symbols input by the user into the corresponding electrical signal by the human-machine interaction device A4 belongs to the prior art, and the human-machine interaction device A4 with the corresponding function can be directly used.

[0045] The human-machine interaction device A4 is communicatively connected with the main control integrated circuit A1, and is used to send a flow rate electrical signal to the main control integrated circuit A1, so that the main control integrated circuit A1 forwards the flow rate electrical signal to the PID control circuit A2, and the PID control circuit A2 then forwards the flow rate electrical signal to the water pump A5, so that the speed of the stepper motor of the water pump A5 matches the size of the flow rate electrical signal. The larger the flow rate electrical signal, the faster the stepper motor speed, and thus the larger the output water flow, thereby obtaining the output flow of the water pump A5.

[0046] The flow sensor A3 collects the flow output signal of the water pump A5 output flow in real time and feeds it back to the input end of the PID control circuit A2. The PID control circuit A2 adjusts the flow electrical signal stably through the proportional, integral, and differential circuits according to the error between the flow output signal and the flow electrical signal, so as to reduce the error between the flow output signal and the flow electrical signal, and sends the obtained adjustment electrical signal to the water pump A5, so as to keep the output flow of the water pump A5 stable. Through this solution, even if the water pump flow rate slightly moves, the real-time adjustment of the PID control circuit A2 can maintain the stable output of the overall flow rate of the water pump A5, avoiding the danger of affecting the safety of patients.

[0047] In some embodiments, Figure 2 As shown, the human-machine interaction device A4 includes a human-machine interaction faceplate A6 and a foot controller A7; the human-machine interaction faceplate A6 and the foot controller A7 are both communicatively connected to the main control integrated circuit A1, and the flow sensor A3 is also communicatively connected to the main control integrated circuit A1 to feed back the flow output signal to the main control integrated circuit A1; the human-machine interaction faceplate A6 is used to display the flow output signal received by the main control integrated circuit A1, and the foot controller A7 is used to input the flow electrical signal.

[0048] Specifically, the human-machine interaction device A4 provided in the embodiment of the utility model includes two types: a human-machine interaction faceplate A6 and a foot controller A7. The human-machine interaction faceplate A6 can be used as a control panel for starting and shutting down the entire endoscope water pump device, and can also display the flow output signal fed back by the flow sensor A3, so that the user can know the current flow rate. At the same time, a separate foot controller A7 is provided for inputting flow electrical signals. The foot controller A7 can be implemented by a switch element such as an electronic throttle, so that the user's hands can be freed, so that the user can only operate the endoscope with both hands, and the flow rate of the water pump A5 can be controlled by the depth of the foot pedal, thereby improving the flexibility of the user in operating the endoscope water pump device.

[0049] In some implementations, the embodiment of the utility model is further provided with a pump head detection sensor A8, which is installed at the pump head of the water pump A5, and the pump head detection sensor A8 is communicatively connected with the main control integrated circuit A1.

[0050] Specifically, a pump head detection sensor A8 is provided to detect whether the pump head of the endoscope water pump device is loose. When the pump head is loose, the detection signal fed back by the pump head detection sensor A8 changes, so that the user can be reminded in time through the human-computer interaction device A4 that the pump head is loose and needs to be tightened and adjusted in time, thereby reminding the user to repair the endoscope water pump device as soon as possible, thereby reducing the danger of a loose pump head to patient safety.

[0051] In some embodiments, the pump head detection sensor A8 is a vibration sensor.

[0052] Specifically, the embodiment of the utility model uses a vibration sensor as the pump head detection sensor A8. When the pump head is not loose, the position of the pump head is more stable, and the vibration signal fed back by the vibration sensor is small and changes steadily. When the pump head is loose, the amplitude of the pump head is larger, the vibration signal fed back by the vibration sensor is larger and less stable, and the noise of the vibration signal is larger, so that the looseness of the pump head can be accurately detected, and the user is reminded to repair the endoscope water pump device as soon as possible, which can further reduce the danger of loose pump head to patient safety.

[0053] In some embodiments, the pump head detection sensor A8 includes two metal contacts, one of which contacts the pump head A52, and the other contacts the pump port A51, which is the interface for installing the pump head A52 on the water pump A5; the two metal contacts are not connected to each other, and one of the two metal contacts is connected to the positive pole of the power supply provided by the main control integrated circuit A1, and the other is connected to the negative pole of the power supply provided by the main control integrated circuit A1; the pump port A51 and the pump head A52 are made of metal; the pump head detection pin of the main control integrated circuit A1 is connected to one of the metal contacts.

[0054] Specifically, Figure 3As shown, an embodiment of the utility model provides another pump head detection sensor A8. In this embodiment, the pump head detection sensor A8 includes two metal contacts, for example: the first metal contact A81 is connected to the positive pole of the power supply provided by the main control integrated circuit A1, and the second metal contact A82 is connected to the negative pole of the power supply provided by the main control integrated circuit A1 (the positions of the first metal contact A81 and the second metal contact A82 can be interchanged). At the same time, the two metal contacts are respectively in contact with the pump port A51 and the pump head A52. In this embodiment, the materials of the pump port A51 and the pump head A52 are required to be metal, so that when the pump head A52 is firmly installed on the pump port A51, the positive pole of the power supply, the first metal contact A81, the pump port A51, the pump head A52, the second metal contact A82, and the negative pole of the power supply can form a circuit. When the pump head detection pin of the main control integrated circuit A1 is connected to one of the metal contacts, the pump head detection pin of the main control integrated circuit A1 can continuously receive a high-level signal. When the pump head A52 is loose, the pump head A52 vibrates during operation, and a gap occurs between the pump head A52 and the metal contact pin in contact with it, resulting in poor contact. The positive electrode of the power supply, the first metal contact pin A81, the pump port A51, the pump head A52, the second metal contact pin A82, and the negative electrode of the power supply can form a circuit that is intermittently disconnected, thereby causing the signal received by the pump head detection pin of the main control integrated circuit A1 to switch and change between high and low levels, and accurately detect the looseness of the pump head. In addition, the pump head detection sensor A8 of this embodiment is simple to implement and low in cost. While further reducing the danger of loose pump heads to patient safety, it can also reduce the overall cost of the endoscope water pump electronic system.

[0055] In some implementations, the endoscope water pump electronic system provided by the embodiment of the utility model further includes an alarm device A9, and the alarm device A9 is connected to the main control integrated circuit A1.

[0056] Specifically, Figure 4 As shown, the embodiment of the utility model also provides an alarm device A9 including but not limited to LED lights, buzzers, etc., so as to connect the alarm device A9 to the main control integrated circuit A1. When the pump head is loose and the flow rate is abnormal, the pump head detection sensor A8 on the water pump A5 transmits the detection signal back to the main control integrated circuit A1, and the main control integrated circuit A1 can stop the operation of the water pump A5 according to the received detection signal. At the same time, the main control integrated circuit A1 sends an alarm message to the alarm device A9 to prompt the medical staff. In addition, the medical staff can also be warned through the human-computer interaction panel A6, reminding the user to repair the endoscope water pump device as soon as possible, which can further reduce the danger to patient safety caused by the loose pump head or the failure of the PID module to fine-tune the flow rate.

[0057] In some embodiments, Figure 5As shown, the endoscope water pump electronic system provided by the embodiment of the utility model further includes a hardware protection circuit A10, which is communicatively connected with the PID control circuit A2 and is used to limit the flow electrical signal output by the PID control circuit A2.

[0058] Specifically, when an abnormal flow occurs in the electronic system of the endoscope water pump, the single fault handling method for the abnormal flow can be divided into hardware processing and software processing. In this embodiment, the hardware protection circuit A10 is used for overvoltage protection, so that when the flow electrical signal output by the PID control circuit A2 is too large, it plays a limiting role to avoid damage to the equipment hardware due to a large output voltage, and further ensures the safety of the patient. For example: In this embodiment, a voltage-limiting diode can be connected in parallel in the PID control circuit A2 to limit the voltage of the PID control circuit A2, thereby achieving the purpose of overvoltage protection. When the voltage in the PID control circuit A2 exceeds the voltage of the limiting diode, the diode will begin to conduct, thereby limiting the output voltage of the PID control circuit A2.

[0059] In some implementations, the hardware protection circuit A10 includes: a voltage follower A11, a D flip-flop A12, and a transistor A13; Figure 6 As shown, the first input terminal and the second input terminal of the voltage follower A11 are respectively used to receive the flow electrical signal sent by the PID control circuit A2 and the first threshold voltage signal sent by the main control integrated circuit A1, the output terminal of the voltage follower A11 is connected to the input terminal of the D trigger A12, the output terminal of the D trigger A12 is connected to the enable terminal of the transistor A13, the input terminal of the transistor A13 is connected to the output terminal of the PID control circuit A2, and the output terminal of the transistor A13 is grounded.

[0060] Specifically, in the embodiment of the utility model, a hardware protection circuit A10 for abnormal flow is implemented by a voltage follower A11, a D flip-flop A12 and a transistor A13. The voltage follower A11 is a feedback circuit, the basic principle of which is to use negative feedback to achieve the matching between the output voltage and the input voltage. It consists of two basic components: an amplifier and a feedback circuit. The amplifier can be any type of amplifier, such as a common-emitter amplifier, a common-base amplifier or a common-collector amplifier. The function of the feedback circuit is to compare the output signal of the amplifier with the input signal, and feed back the difference to the input end of the amplifier to maintain the stability of the output voltage.

[0061] D flip-flop A12 is an information storage device with memory function and two stable states. It is the most basic logic unit of various sequential circuits and an important unit circuit in digital logic circuits. D flip-flop A12 has two stable states, namely 0 and 1. Under the action of certain external signals, it can flip from one stable state to another stable state. In this embodiment, D flip-flop A12 plays a self-locking role.

[0062] There are two signals in the voltage follower A11, one is the feedback output by the PID control circuit A2, and the other is the first threshold voltage signal provided by the main control integrated circuit A1. The first threshold voltage signal is defined by the user. When the flow electrical signal output by the PID control circuit A2 is greater than the first threshold voltage signal, the voltage follower A11 will generate a rising edge signal, which will be input into the clock pin of the input end of the D flip-flop A12. When the D flip-flop A12 detects the rising edge signal, the output pin of the D flip-flop A12 will flip to generate a high-level signal, which will be input into the enable end of the transistor A13, thereby turning on the transistor A13. After the transistor A13 is turned on, the voltage output by the PID control circuit A2 is conducted to the ground through the input end to the output end of the transistor A13, thereby achieving a safety protection effect.

[0063] It should be noted that when the transistor A13 is an NPN transistor A13, the enable end is the base, the input end is the collector, and the output end is the emitter; when the transistor A13 is a PNP transistor A13, the enable end is the base, the input end is the emitter, and the output end is the collector.

[0064] In some embodiments, Figure 7 As shown, the endoscope water pump electronic system provided by the embodiment of the utility model also includes: a power-off comparator A14 and a power-off protector A15, the power-off protector A15 is connected between the main control integrated circuit A1 and the external power supply, the enable end of the power-off protector A15 is connected to the output end of the power-off comparator A14, and the input end of the power-off comparator A14 receives the second threshold voltage signal sent by the main control integrated circuit A1 and the flow electrical signal sent by the PID control circuit A2 respectively.

[0065] Specifically, the embodiment of the utility model also sets a power-off protector A15 between the main control integrated circuit A1 and the external power supply. The power-off protector A15 can be a relay switch. The power-off comparator A14 is used to compare the flow electrical signal output by the PID control circuit A2 with the second threshold voltage signal predefined by the main control integrated circuit A1. The second threshold voltage signal can be set to a larger voltage threshold. The second threshold voltage signal is greater than the first threshold voltage signal. When the flow electrical signal output by the PID control circuit A2 exceeds the second threshold voltage signal, it indicates that the water pump A5 device has a serious fault. The power-off comparator A14 changes from outputting a low level to outputting a high level. The high level output is to the power-off protector A15, which controls the power-off protector A15 to disconnect the path between the main control integrated circuit A1 and the external power supply, thereby achieving the effect of cutting off the power to the endoscope water pump device, further ensuring the safety of the patient.

[0066] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An endoscope water pump electronic system, characterized in that: include: Controller, flow sensor, human-machine interaction device and water pump; the controller includes a main control integrated circuit and a PID control circuit; The flow sensor is located in the water supply pipe, one end of the water supply pipe is sleeved on the pump head of the water pump, the other end of the water supply pipe is connected to the endoscope forceps pipeline, the flow sensor is communicatively connected with the PID control circuit, the flow sensor is used to collect the flow output signal of the water pump output flow, and feed the flow output signal back to the PID control circuit; The human-machine interaction device is communicatively connected with the main control integrated circuit, and the human-machine interaction device is used to send a flow rate electrical signal to the main control integrated circuit, and the main control integrated circuit is used to forward the flow rate electrical signal to the PID control circuit, and the PID control circuit forwards the flow rate electrical signal to the water pump to obtain the output flow rate of the water pump; The PID control circuit is used to stably adjust the flow electrical signal according to the flow output signal, and send the obtained adjusted electrical signal to the water pump to keep the output flow of the water pump stable.

2. The endoscope water pump electronic system according to claim 1, characterized in that: The human-machine interaction device includes a human-machine interaction face screen and a foot controller; the human-machine interaction face screen and the foot controller are both communicatively connected to the main control integrated circuit, and the flow sensor is also communicatively connected to the main control integrated circuit to feed back the flow output signal to the main control integrated circuit; the human-machine interaction face screen is used to display the flow output signal received by the main control integrated circuit, and the foot controller is used to input the flow electrical signal.

3. The endoscope water pump electronic system according to claim 1, characterized in that: It also includes a pump head detection sensor, which is installed at the pump head of the water pump and is communicatively connected with the main control integrated circuit.

4. The endoscope water pump electronic system according to claim 3, characterized in that: The pump head detection sensor is a vibration sensor.

5. The endoscope water pump electronic system according to claim 3, characterized in that: The pump head detection sensor includes two metal contacts, one of which contacts the pump head and the other contacts the pump port, and the pump port is the interface on the water pump for installing the pump head; the two metal contacts are not connected to each other, and one of the two metal contacts is connected to the positive pole of the power supply provided by the main control integrated circuit, and the other is connected to the negative pole of the power supply provided by the main control integrated circuit; the pump port and the pump head are made of metal; the pump head detection pin of the main control integrated circuit is connected to one of the metal contacts.

6. The endoscope water pump electronic system according to claim 3, characterized in that: It also includes an alarm device, which is connected to the main control integrated circuit.

7. The endoscope water pump electronic system according to claim 1, characterized in that: It also includes a hardware protection circuit, which is communicatively connected with the PID control circuit and is used to limit the flow electrical signal output by the PID control circuit.

8. The endoscope water pump electronic system according to claim 7, characterized in that: The hardware protection circuit includes: a voltage follower, a D trigger and a triode; The first input terminal and the second input terminal of the voltage follower are respectively used to receive the flow electrical signal sent by the PID control circuit and the first threshold voltage signal sent by the main control integrated circuit, the output terminal of the voltage follower is connected to the input terminal of the D trigger, the output terminal of the D trigger is connected to the enable terminal of the transistor, the input terminal of the transistor is connected to the output terminal of the PID control circuit, and the output terminal of the transistor is grounded.

9. The endoscope water pump electronic system according to claim 1, characterized in that: Also includes: A power-off comparator and a power-off protector, wherein the power-off protector is connected between the main control integrated circuit and an external power supply, the enable end of the power-off protector is connected to the output end of the power-off comparator, and the input end of the power-off comparator receives the second threshold voltage signal sent by the main control integrated circuit and the flow electrical signal sent by the PID control circuit respectively.

10. The endoscope water pump electronic system according to claim 6, characterized in that: The alarm device is a buzzer.

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