Ultrasonic water meter detection device

Abstract

The invention discloses an ultrasonic water meter detection device. The detection device comprises a main control module and an analog metering module, the main control module is connected with the control end of the analog metering module, and the test end of the analog metering module is connected with the ultrasonic water meter; the main control module is used for generating a water flowing simulation signal according to the water flowing setting information and sending the water flowing simulation signal to the simulation metering module; wherein the water flowing analog signal comprises a water flowing state signal and a water flowing velocity signal; the ultrasonic water meter is used for sending an ultrasonic detection signal to the analog metering module in real time after being triggered; and the analog metering module is used for receiving the ultrasonic detection signal and the water flowing analog signal, generating a water flowing feedback signal which can be received by the ultrasonic water meter according to the ultrasonic detection signal and the water flowing analog signal, and sending the water flowing feedback signal to the ultrasonic water meter so as to simulate different water flowing states. According to the invention, the resource consumption is reduced, the time cost is reduced, the human intervention intensity is reduced, and the test error-tolerant rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water meter detection, and in particular to an ultrasonic water meter detection device. Background Art

[0002] In the production process of ultrasonic water meters, it is necessary to perform functional testing and verification on the water meter PCB. In the prior art, the detection method for functional testing of ultrasonic water meters requires the construction of a closed fluid circulation pipeline system for real flow calibration, which has a high testing cost. Summary of the invention

[0003] The present invention provides an ultrasonic water meter detection device to reduce resource consumption, reduce time cost, reduce human intervention intensity, and improve test fault tolerance.

[0004] According to one aspect of the present invention, an ultrasonic water meter detection device is provided, the ultrasonic water meter detection device comprising:

[0005] Main control module and analog metering module;

[0006] The main control module is connected to the control end of the analog metering module, and the test end of the analog metering module is connected to the ultrasonic water meter;

[0007] The main control module is used to receive the water leakage setting information, generate a water leakage simulation signal according to the water leakage setting information, and send the water leakage simulation signal to the analog metering module; wherein the water leakage simulation signal includes a water leakage state signal and a water leakage flow rate signal;

[0008] The ultrasonic water meter is used to send ultrasonic detection signals to the analog metering module in real time after being triggered;

[0009] The analog metering module is used to receive the ultrasonic detection signal and the water leakage simulation signal, and generate a water leakage feedback signal that can be received by the ultrasonic water meter based on the ultrasonic detection signal and the water leakage simulation signal, and send the water leakage feedback signal to the ultrasonic water meter to simulate different water leakage states.

[0010] Further, the analog metering module includes a control unit and an analog circuit unit;

[0011] A first end of the main control module is connected to a first end of the control unit, a second end of the control unit is connected to a first end of the analog circuit unit, a second end of the analog circuit unit is connected to an ultrasonic water meter, and a third end of the analog circuit unit is connected to a third end of the control unit;

[0012] The control unit is used to receive the ultrasonic detection signal and the water leakage simulation signal, generate a digital feedback signal according to the ultrasonic detection signal and the water leakage simulation signal, and send the digital feedback signal to the analog circuit unit;

[0013] The analog circuit unit is used to receive the digital feedback signal, perform analog processing on the digital feedback signal, generate a water leakage feedback signal, and transmit the water leakage feedback signal to the ultrasonic water meter to simulate different water leakage states.

[0014] Furthermore, the analog circuit unit includes:

[0015] A first resistor, a second resistor, a first capacitor, a second capacitor and a connection port;

[0016] A first signal transmitting end of the control unit is connected to a first end of a first resistor, a second end of the first resistor is connected to a first end of a first capacitor, a second end of the first capacitor is connected to a first end of a connection port, and the first end of the connection port is connected to a first signal receiving end of the control unit; a second signal transmitting end of the control unit is connected to a first end of a second resistor, a second end of the second resistor is connected to a first end of a second capacitor, a second end of the second capacitor is connected to a second end of the connection port, and the second end of the connection port is connected to a second signal receiving end of the control unit; a fourth end of the connection port is connected to a first signal end of an ultrasonic water meter, and a fifth end of the connection port is connected to a second signal end of the ultrasonic water meter; a third end of the connection port is grounded, and a fourth end of the connection port is connected to a ground end of the ultrasonic water meter;

[0017] The control unit is used to send a first digital feedback signal to the analog circuit unit through the second signal transmitting end of the control unit after receiving a first ultrasonic detection signal transmitted from the first end of the connection port for a first preset duration according to the water leakage simulation signal; and send a second digital feedback signal to the analog circuit unit through the first signal transmitting end of the control unit after receiving a second ultrasonic detection signal transmitted from the second end of the connection port for a second preset duration.

[0018] Furthermore, the control unit is used to:

[0019] The difference between the first preset time length and the second preset time length is controlled according to the water leakage simulation signal.

[0020] Furthermore, the water flow state signal includes a still water state signal and a flowing water state signal.

[0021] Furthermore, the control unit is used to:

[0022] If a static water state signal is received, the difference between the first preset time length and the second preset time length is controlled to be zero;

[0023] If a water flow status signal is received, the difference between the first preset time length and the second preset time length is controlled according to the water flow rate signal.

[0024] Furthermore, the water flow state signal also includes a water-free state signal;

[0025] The control unit is used to:

[0026] If the water-free state signal is received, the first signal transmitting end and the second signal transmitting end are controlled not to send a feedback signal.

[0027] Furthermore, the power supply end of the main control module is connected to the power supply end of the analog metering module, and the main control module is used to supply power to the analog metering module.

[0028] Furthermore, the ultrasonic water meter detection device also includes:

[0029] Serial port module;

[0030] The main control module is connected to the first end of the analog metering module through the serial port module.

[0031] Furthermore, the control unit includes a single chip microcomputer.

[0032] The ultrasonic water meter detection device provided by the embodiment of the present invention receives water leakage setting information through the main control module, generates a water leakage simulation signal according to the water leakage setting information, and sends the water leakage simulation signal to the analog metering module. After being triggered, the ultrasonic water meter sends an ultrasonic detection signal to the analog metering module in real time. After receiving the ultrasonic detection signal, the analog metering module generates a water leakage feedback signal that can be received by the ultrasonic water meter according to the water leakage simulation signal, and sends the water leakage feedback signal to the ultrasonic water meter to simulate different water leakage states. Compared with the prior art that requires the construction of a closed fluid circulation pipeline system for real flow calibration, there is no need for actual water consumption, which reduces resource consumption. Under the condition of ensuring test accuracy, the test cycle is shortened and the time cost is reduced. The ultrasonic water meter detection device provided by the present invention also reduces the intensity of human intervention in the detection process. At the same time, the product circuit can be used without changing during the test process, which improves the test fault tolerance.

[0033] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a structural schematic diagram of an ultrasonic water meter detection device provided according to an embodiment of the present invention;

[0036] Figure 2is a schematic diagram of flow velocity display of an ultrasonic water meter provided according to an embodiment of the present invention;

[0037] Figure 3 is a schematic structural diagram of another ultrasonic water meter detection device provided according to an embodiment of the present invention;

[0038] Figure 4 is a structural schematic diagram of another ultrasonic water meter detection device provided according to an embodiment of the present invention;

[0039] Figure 5 is a schematic diagram of a signal waveform flowing through different signal ends of an ultrasonic water meter provided according to an embodiment of the present invention;

[0040] Figure 6-Figure 8 is a schematic diagram of a signal waveform emitted by an ultrasonic water meter provided according to an embodiment of the present invention;

[0041] Fig. 9 is a structural schematic diagram of another ultrasonic water meter detection device provided according to an embodiment of the present invention;

[0042] Fig.10 It is a structural diagram of a serial port module provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] An ultrasonic water meter detection device provided by an embodiment of the present invention, Figure 1is a schematic diagram of the structure of an ultrasonic water meter detection device provided according to an embodiment of the present invention, with reference to Figure 1 , the ultrasonic water meter detection device includes:

[0046] Main control module 1 and analog metering module 2;

[0047] The main control module 1 is connected to the control end of the analog metering module 2, and the test end of the analog metering module 2 is connected to the ultrasonic water meter 3;

[0048] The main control module 1 is used to receive the water leakage setting information, generate a water leakage simulation signal according to the water leakage setting information, and send the water leakage simulation signal to the analog metering module 2; wherein the water leakage simulation signal includes a water leakage state signal and a water leakage flow rate signal;

[0049] The ultrasonic water meter 3 is used to send an ultrasonic detection signal to the analog metering module 2 in real time after being triggered;

[0050] The analog metering module 2 is used to receive the ultrasonic detection signal and the water leakage simulation signal, and generate a water leakage feedback signal that can be received by the ultrasonic water meter based on the ultrasonic detection signal and the water leakage simulation signal, and send the water leakage feedback signal to the ultrasonic water meter 3 to simulate different water leakage states.

[0051] Specifically, the tester can set the water flow setting information on the main control module 1 according to actual needs, wherein the water flow setting information includes water flow state setting information and water flow rate setting information. For example, the tester can set the water flow state to the flowing water state and the water flow rate to 10m / s on the main control module 1. 3 / h, you can also set the water flow state to static water state on the main control module 1, and the water flow rate to 0m 3 / h. After receiving the water leakage setting information set by the tester, the main control module 1 converts the water leakage setting information into a water leakage simulation signal, and sends the water leakage simulation signal to the analog metering module 2. At the same time, after being triggered, the ultrasonic water meter 3 sends an ultrasonic detection signal to the analog metering module 2 in real time. After receiving the ultrasonic detection signal, the analog metering module 2 generates a water leakage feedback signal that can be recognized by the ultrasonic water meter 3 according to the water leakage simulation signal, so as to simulate the water leakage state and water leakage flow rate. For example, Figure 2 is a schematic diagram showing the flow rate of an ultrasonic water meter according to an embodiment of the present invention, with reference to Figure 2 If the water flow simulation signal received by the analog metering module 2 contains the set water flow state as the flowing water state, the water flow rate is 11m 3 / h, at this time, if the ultrasonic water meter 3 receives the water flow feedback signal, it can display the water flow rate as 11m 3 / h, which means that the ultrasonic water meter 3 detection functional test is normal.

[0052] The ultrasonic water meter detection device provided in the embodiment of the present invention receives water leakage setting information through the main control module 1, generates a water leakage simulation signal according to the water leakage setting information, and sends the water leakage simulation signal to the analog metering module 2. After being triggered, the ultrasonic water meter 3 sends an ultrasonic detection signal to the analog metering module 2 in real time. After receiving the ultrasonic detection signal, the analog metering module 2 generates a water leakage feedback signal that can be received by the ultrasonic water meter according to the water leakage simulation signal, and sends the water leakage feedback signal to the ultrasonic water meter 3 to simulate different water leakage states. Compared with the prior art that needs to build a closed fluid circulation pipeline system for real flow calibration, there is no need for actual water consumption, which reduces resource consumption. Under the condition of ensuring test accuracy, the test cycle is shortened and the time cost is reduced. The ultrasonic water meter detection device provided by the present invention also reduces the intensity of human intervention in the detection process. At the same time, it can be used without changing the product circuit during the test process, which improves the test fault tolerance.

[0053] Furthermore, Figure 3 is a schematic diagram of the structure of another ultrasonic water meter detection device provided according to an embodiment of the present invention, Figure 3 , the analog metering module includes a control unit 21 and an analog circuit unit 22;

[0054] A first end of the main control module 1 is connected to a first end of the control unit 21, a second end of the control unit 21 is connected to a first end of the analog circuit unit 22, a second end of the analog circuit unit 22 is connected to the ultrasonic water meter 3, and a third end of the analog circuit unit 22 is connected to a third end of the control unit 21;

[0055] The control unit 21 is used to receive the ultrasonic detection signal and the water leakage simulation signal, generate a digital feedback signal according to the ultrasonic detection signal and the water leakage simulation signal, and send the digital feedback signal to the analog circuit unit 22;

[0056] The analog circuit unit 22 is used to receive the digital feedback signal, perform analog processing on the digital feedback signal, generate a water leakage feedback signal, and transmit the water leakage feedback signal to the ultrasonic water meter 3 to simulate different water leakage states.

[0057] Specifically, after receiving the ultrasonic detection signal sent by the ultrasonic water meter 3, the control unit 21 generates a digital feedback signal containing water leakage simulation information according to the water leakage simulation signal, and sends the digital feedback signal to the analog circuit unit 23. The analog circuit unit 23 simulates the received digital feedback signal to generate a water leakage feedback signal that can be recognized by the ultrasonic water meter 3 to simulate different water leakage states.

[0058] Furthermore, Figure 4 is a schematic diagram of the structure of another ultrasonic water meter detection device provided according to an embodiment of the present invention, Figure 4, the analog circuit unit includes:

[0059] A first resistor R1, a second resistor R2, a first capacitor C5, a second capacitor C6 and a connection port P1;

[0060] A first signal transmitting terminal PWMA of the control unit 21 is connected to a first end of the first resistor R1, a second end of the first resistor R1 is connected to a first end of the first capacitor C5, a second end of the first capacitor C5 is connected to a first end 1 of the connection port P1, and the first end 1 of the connection port P1 is connected to a first signal receiving terminal of the control unit 21; a second signal transmitting terminal PWMB of the control unit 21 is connected to a first end of the second resistor R2, a second end of the second resistor R2 is connected to a first end of the second capacitor C6, a second end of the second capacitor C6 is connected to a second end 2 of the connection port P1, and a second end 2 of the connection port P1 is connected to a second signal receiving terminal of the control unit 21; a fourth end 4 of the connection port P1 is connected to a first signal end A of the ultrasonic water meter 3, and a fifth end 5 of the connection port P1 is connected to a second signal end B of the ultrasonic water meter 3; a third end 3 of the connection port P1 is grounded, and a fourth end 4 of the connection port P1 is connected to a ground terminal of the ultrasonic water meter 3;

[0061] The control unit 21 is used to send a first digital feedback signal to the analog circuit unit through the second signal transmitting end PWMB of the control unit 21 after receiving the first ultrasonic detection signal transmitted from the first end of the connection port P1 for a first preset duration according to the water leakage simulation signal; and send a second digital feedback signal to the analog circuit unit through the first signal transmitting end PWMA of the control unit 21 after receiving the second ultrasonic detection signal transmitted from the second end of the connection port P1 for a second preset duration.

[0062] The third end 3 of the connection port P1 is grounded, and the fourth end 4 of the connection port P1 is connected to the ground end of the ultrasonic water meter 3 , so that the ground end of the analog circuit unit and the ground end of the ultrasonic water meter 3 are shared.

[0063] Specifically, when the first signal receiving end of the control unit 21 receives the first ultrasonic detection signal sent by the ultrasonic water meter 3, exemplarily, Figure 5 is a schematic diagram of a signal waveform flowing through different signal ends of an ultrasonic water meter according to an embodiment of the present invention, with reference to Figure 5The first ultrasonic detection signal can be a square wave signal. When the control unit 21 detects the first rising edge of the square wave signal emitted by the first signal terminal A of the ultrasonic water meter 3, the control timer is controlled to start timing, and after the timer times the first preset time t1, the second signal transmitting terminal PWMB of the control unit 21 sends a first digital feedback signal to the analog circuit unit, wherein the duty cycle and the number of cycles of the first digital feedback signal are consistent with the duty cycle and the number of cycles of the first ultrasonic detection signal emitted by the ultrasonic water meter 3. The analog circuit unit 22 converts the received first digital feedback signal into a first water leakage feedback signal, and transmits the first water leakage feedback signal to the ultrasonic water meter 3 through the second signal terminal B of the ultrasonic water meter 3. After receiving the first water leakage feedback signal, the ultrasonic water meter 3 continues to pass The second signal terminal B sends a second ultrasonic detection signal to the second signal receiving terminal of the control unit 21. For example, the second ultrasonic detection signal can be a square wave signal. When the control unit 21 detects the first rising edge of the square wave signal, the control unit 21 controls the timer to start timing, and after the timer times the second preset time t2, the first signal transmitting terminal PWMA of the control unit 21 sends a second digital feedback signal to the analog circuit unit, wherein the duty cycle and the number of cycles of the second digital feedback signal are consistent with the duty cycle and the number of cycles of the second ultrasonic detection signal sent by the ultrasonic water meter 3. The analog circuit unit converts the received second digital feedback signal into a second water leakage feedback signal, and transmits the second water leakage feedback signal to the ultrasonic water meter 3 through the first signal terminal A of the ultrasonic water meter 3, so as to circulate. Among them, the first resistor R1 and the second resistor R2 are used to limit the charging speed of the first capacitor C5 and the second capacitor C6. The larger the first resistor R1 and the second resistor R2, the smaller the current flowing through the analog circuit unit, and the slower the charging of the first capacitor C5 and the second capacitor C6. The voltage of the capacitor can be limited in a limited time, thereby realizing the control of the amplitude of the water leakage feedback signal output to the ultrasonic water meter 3. The square wave of the digital feedback signal will change after passing through the capacitor, and then a waveform that can be detected by the ultrasonic water meter 3 can be obtained. For example, Figure 6-Figure 8 is a schematic diagram of a signal waveform emitted by an ultrasonic water meter according to an embodiment of the present invention, with reference to Figure 6-Figure 8 ,like Figure 6 As shown, the two ports of the ultrasonic water meter respectively transmit waveforms regularly, the waveform output by the first signal terminal A is a yellow waveform, and the waveform output by the second signal terminal B is a green waveform. Figure 7 for Figure 6 An enlarged view of a section of the waveform, such as Figure 7 As shown, when the second signal terminal B of the ultrasonic water meter sends a waveform, another port will have a voltage rise, and the clutter C corresponding to the voltage rise band is the interference generated by the port that sends the waveform. Figure 8 for Figure 7Zooming in on the waveform again, we can see that the waveform emitted by the ultrasonic water meter is a 15-cycle square wave with a 50% duty cycle.

[0064] Furthermore, the control unit is used to:

[0065] The difference between the first preset time length and the second preset time length is controlled according to the water leakage simulation signal.

[0066] Specifically, the control unit controls the difference between the first preset time length and the second preset time length according to the water leakage simulation signal, so as to output different water leakage feedback signals to the ultrasonic water meter according to the water leakage simulation signal, thereby simulating different water leakage states and water leakage flow rates, thereby realizing the detection of the ultrasonic water meter.

[0067] Furthermore, the water flow state signal includes a still water state signal and a flowing water state signal.

[0068] Furthermore, the control unit is used to:

[0069] If a static water state signal is received, the difference between the first preset time length and the second preset time length is controlled to be zero;

[0070] If a water flow status signal is received, the difference between the first preset time length and the second preset time length is controlled according to the water flow rate signal.

[0071] Specifically, if the control unit receives the static water state signal sent by the main control module, the difference between the first preset time and the second preset time is controlled to be zero. At this time, if the ultrasonic water meter receives the water leakage feedback signal, the water leakage flow rate is displayed as 0m 3 / h, it means that the ultrasonic water meter detection function test is normal; if the ultrasonic water meter receives the water flow feedback signal, the water flow rate is not 0m 3 / h, it means that the ultrasonic water meter detection functional test is abnormal.

[0072] If the control unit receives the water flow state signal sent by the main control module, the difference between the first preset time and the second preset time is controlled according to the water flow rate signal. The faster the water flow rate, the greater the difference between the first preset time and the second preset time. If the water flow simulation signal received by the analog metering module contains the set water flow state as the water flow state, the water flow rate is 5m 3 / h, at this time, if the ultrasonic water meter receives the water leakage feedback signal, the water leakage flow rate will be 5m 3 / h, it means that the ultrasonic water meter detection function test is normal; if the ultrasonic water meter receives the water leakage feedback signal, the water leakage flow rate is not 5m 3 / h, it means that the ultrasonic water meter detection functional test is abnormal.

[0073] Furthermore, the water flow state signal also includes a water-free state signal;

[0074] The control unit is used to:

[0075] If the water-free state signal is received, the first signal transmitting end and the second signal transmitting end are controlled not to send a feedback signal.

[0076] Specifically, if the control unit receives a water-free state signal sent by the main control module, the first signal transmitting end and the second signal transmitting end are controlled not to send a feedback signal. At this time, if the ultrasonic water meter does not receive a water leakage feedback signal, the water leakage flow rate is displayed as 0m 3 / h, and the water-free mark flashes on the screen, it means that the ultrasonic water meter detection functional test is normal; if the ultrasonic water meter normally displays that the water flow rate is not 0m 3 / h, or the water flow rate is displayed as 0m 3 / h, but there is no no-water sign flashing on the screen, which means that the ultrasonic water meter detection functional test is abnormal.

[0077] For further information, please refer to Figure 1 The power supply end of the main control module 1 is connected to the power supply end of the analog metering module 2 , and the main control module 1 is used to supply power to the analog metering module 2 .

[0078] Specifically, if the power supply end of the main control module 1 is connected to the power supply end of the analog metering module 2, the main control module 1 and the analog metering module 2 can share a power supply, avoiding the need to set up a separate power supply to power the analog metering module 2, thereby reducing design costs.

[0079] Furthermore, Fig. 9 is a schematic diagram of the structure of another ultrasonic water meter detection device provided according to an embodiment of the present invention. Fig.10 is a schematic diagram of the structure of a serial port module provided according to an embodiment of the present invention, with reference to Fig. 9 and Fig.10 , the ultrasonic water meter detection device also includes:

[0080] Serial port module 4;

[0081] The main control module 1 is connected to the first end of the analog metering module 2 via the serial port module 4 .

[0082] Specifically, the serial port module 4 includes a third resistor R13, a fourth resistor R14 and a connection port P3, the power end of the connection port P3 is connected to the power supply, the first connection end of the main control module 1 is connected to the first end of the third resistor R13, the second end of the third resistor R13 is connected to the second connection end of the connection port P3, the second connection end of the main control module 1 is connected to the first end of the fourth resistor R14, the second end of the fourth resistor R14 is connected to the third connection end of the connection port P3, the ground end of the connection port P3 is grounded, and the port part of the connection port P3 is connected to the main control module 1, so as to realize information interaction between the main control module 1 and the analog metering module 2.

[0083] Furthermore, the control unit includes a single chip microcomputer.

[0084] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0085] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic water meter detection device, characterized in that: include: Main control module and analog metering module; The main control module is connected to the control end of the analog metering module, and the test end of the analog metering module is connected to the ultrasonic water meter; The main control module is used to receive water leakage setting information, generate a water leakage simulation signal according to the water leakage setting information, and send the water leakage simulation signal to the analog metering module; wherein the water leakage simulation signal includes a water leakage state signal and a water leakage flow rate signal; The ultrasonic water meter is used to send an ultrasonic detection signal to the analog metering module in real time after being triggered; The analog metering module is used to receive the ultrasonic detection signal and the water leakage simulation signal, and generate a water leakage feedback signal that can be received by the ultrasonic water meter according to the ultrasonic detection signal and the water leakage simulation signal, and send the water leakage feedback signal to the ultrasonic water meter to simulate different water leakage states.

2. The ultrasonic water meter detection device according to claim 1, characterized in that: The analog metering module includes a control unit and an analog circuit unit; The first end of the main control module is connected to the first end of the control unit, the second end of the control unit is connected to the first end of the analog circuit unit, the second end of the analog circuit unit is connected to the ultrasonic water meter, and the third end of the analog circuit unit is connected to the third end of the control unit; The control unit is used to receive the ultrasonic detection signal and the water leakage simulation signal, generate a digital feedback signal according to the ultrasonic detection signal and the water leakage simulation signal, and send the digital feedback signal to the analog circuit unit; The analog circuit unit is used to receive the digital feedback signal, perform analog processing on the digital feedback signal, generate the water leakage feedback signal, and transmit the water leakage feedback signal to the ultrasonic water meter to simulate different water leakage states.

3. The ultrasonic water meter detection device according to claim 2, characterized in that: The analog circuit unit comprises: A first resistor, a second resistor, a first capacitor, a second capacitor and a connection port; The first signal transmitting end of the control unit is connected to the first end of the first resistor, the second end of the first resistor is connected to the first end of the first capacitor, the second end of the first capacitor is connected to the first end of the connection port, and the first end of the connection port is connected to the first signal receiving end of the control unit; the second signal transmitting end of the control unit is connected to the first end of the second resistor, the second end of the second resistor is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the second end of the connection port, and the second end of the connection port is connected to the second signal receiving end of the control unit; the fourth end of the connection port is connected to the first signal end of the ultrasonic water meter, and the fifth end of the connection port is connected to the second signal end of the ultrasonic water meter; the third end of the connection port is grounded, and the fourth end of the connection port is connected to the ground end of the ultrasonic water meter; The control unit is used to send a first digital feedback signal to the analog circuit unit through the second signal transmitting end of the control unit after receiving a first ultrasonic detection signal transmitted from the first end of the connection port for a first preset duration according to the water leakage simulation signal; and send a second digital feedback signal to the analog circuit unit through the first signal transmitting end of the control unit after receiving a second ultrasonic detection signal transmitted from the second end of the connection port for a second preset duration.

4. The ultrasonic water meter detection device according to claim 3, characterized in that: The control unit is used for: The difference between the first preset time length and the second preset time length is controlled according to the water leakage simulation signal.

5. The ultrasonic water meter detection device according to claim 4, characterized in that: The water flow state signal includes a still water state signal and a flowing water state signal.

6. The ultrasonic water meter detection device according to claim 5, characterized in that: The control unit is used for: If a static water state signal is received, the difference between the first preset time length and the second preset time length is controlled to be zero; If a water flow status signal is received, the difference between the first preset time length and the second preset time length is controlled according to the water flow rate signal.

7. The ultrasonic water meter detection device according to claim 1, characterized in that: The water flow state signal also includes a water-free state signal; The control unit is used for: If the water-free state signal is received, the first signal transmitting end and the second signal transmitting end are controlled not to send a feedback signal.

8. The ultrasonic water meter detection device according to claim 1, characterized in that: The power supply end of the main control module is connected to the power supply end of the analog metering module, and the main control module is used to supply power to the analog metering module.

9. The ultrasonic water meter detection device according to claim 1, characterized in that: Also includes: Serial port module; The main control module is connected to the first end of the analog metering module through the serial port module.

10. The ultrasonic water meter detection device according to claim 1, characterized in that: The control unit includes a single chip microcomputer.

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