Radar and ultrasonic all-in-one machine applied to cellar well pipeline

Abstract

The utility model discloses a radar and ultrasonic all-in-one machine applied to a cellar well pipeline. The radar and ultrasonic all-in-one machine comprises a radar flow velocity module, a radar water level module, an ultrasonic velocity measurement module, a pressure sensor and a main control module. The main control module is connected with the radar flow velocity module, the radar water level module, the ultrasonic velocity measurement module and the pressure sensor; the pressure sensor is used for measuring a pressure intensity value and sending the pressure intensity value to the main control module; and the main control module is used for receiving the pressure value, controlling the radar flow velocity module to measure the pipeline flow velocity of the cellar pipeline based on the pressure value, controlling the radar water level module to measure the water level height of the cellar pipeline, or measuring the water level height, and controlling the ultrasonic speed measurement module to measure the pipeline flow velocity. The pressure value is obtained through the pressure sensor, the main control module controls the corresponding module to measure the flow speed and the water level height of the pipeline based on the pressure value, and the flexibility and the accuracy of water level measurement of the cellar well pipeline can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline measurement, in particular to a radar and ultrasonic integrated machine applied to pit pipelines. Background Art

[0002] Measuring water levels in cellar and well pipes is a critical component of urban drainage system management and maintenance. It's crucial for ensuring proper drainage system operation, preventing urban flooding, and promptly responding to drainage system failures. Flowmeters currently used for pipeline flow monitoring include electromagnetic, ultrasonic, and radar flowmeters. Electromagnetic flowmeters are suitable for measuring flow in full pipes, while radar flowmeters are suitable for measuring flow in partially filled pipes. Ultrasonic flowmeters can measure both full and partially filled pipes, but they have certain installation height requirements and cannot measure flow at extremely low water levels.

[0003] However, the water level in urban manhole pipes is always changing, especially under extreme weather conditions, the water level may change rapidly in a short period of time, which poses a challenge to the response speed and accuracy of the measuring equipment. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated radar and ultrasonic device for use in manhole pipes, addressing the technical problem of existing flow measurement devices being unable to accurately measure the water level within manhole pipes. The various technical effects achieved by the preferred solution among the various technical solutions provided by this utility model are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The utility model provides a radar ultrasonic all-in-one machine applied to a cellar well pipeline, the radar ultrasonic all-in-one machine includes a radar flow velocity module, a radar water level module, an ultrasonic velocity measurement module, a pressure sensor and a main control module; the main control module is connected to the radar flow velocity module, the radar water level module, the ultrasonic velocity measurement module and the pressure sensor; the pressure sensor is used to measure a pressure value and send the pressure value to the main control module; the main control module is used to receive the pressure value and control the radar flow velocity module to measure the pipeline flow velocity of the cellar well pipeline based on the pressure value, and control the radar water level module to measure the water level height of the cellar well pipeline, or measure the water level height, and control the ultrasonic velocity measurement module to measure the pipeline flow velocity.

[0007] In some embodiments, the ultrasonic velocity measurement module includes an ultrasonic transmitting unit; the ultrasonic transmitting unit includes a driving circuit module, a transformer and boost module for providing AC voltage, an impedance matching module and an ultrasonic transmitting probe; one end of the driving circuit module is connected to the main control module, and the other end of the driving circuit module is connected to one end of the transformer and boost module; one end of the impedance matching module is connected to the other end of the transformer and boost module, and the other end of the impedance matching module is connected to the ultrasonic transmitting probe.

[0008] In some embodiments, the driving circuit module is configured to receive a PWM signal from the main control module and control the switching action of the transformer and boost module based on the PWM signal; the impedance matching module is used for LC impedance matching of the transformer and boost module and converts the transmission waveform of the transformer and boost module into a sinusoidal wave signal; the ultrasonic transmitting probe receives the sinusoidal wave signal and converts the sinusoidal wave signal into an ultrasonic transmission signal.

[0009] In some embodiments, the ultrasonic speed measurement module includes an ultrasonic receiving part; the ultrasonic receiving part includes an ultrasonic receiving probe for receiving ultrasonic reflection signals, a bandpass filter module, an amplification module, a mixing circuit module, a low-pass filter module and a clock chip module for generating a local oscillation signal; one end of the bandpass filter module is connected to the ultrasonic receiving probe, and the other end of the bandpass filter module is connected to the amplification module; the mixing circuit module is connected to the amplification module, and the clock chip module and the low-pass filter module are both connected; the low-pass filter module is connected to the main control module.

[0010] In some embodiments, the bandpass filtering module is configured to filter the ultrasonic reflection signal, obtain a filtered signal, and send the filtered signal to the amplification module; the amplification module is configured to amplify the filtered signal, obtain an amplified signal, and send the amplified signal to the mixing circuit module; the mixing circuit module is configured to receive the local oscillator signal of the clock chip module, and mix the amplified signal received from the amplification module into a mixed signal based on the local oscillator signal; the low-pass filtering module receives the mixed signal, filters the mixed signal, and sends the filtered mixed signal to the main control module.

[0011] In some embodiments, the radar flow rate module includes a radar flow rate module for transmitting and receiving radar speed measurement signals, a first frequency selection amplification module and a PGA module; one end of the first frequency selection amplification module is connected to the radar flow rate module, and the other end of the first frequency selection amplification module is connected to the PGA module; the PGA module is connected to the main control module.

[0012] In some embodiments, the radar flow rate module is configured to obtain a flow rate measurement data signal based on the radar speed measurement signal; the first frequency selection amplification module is configured to receive the flow rate measurement data signal and perform frequency selection amplification processing; the PGA module is configured to perform adjustable amplification processing on the flow rate measurement data signal after frequency selection amplification, and send the flow rate measurement data signal after adjustable amplification processing to the main control module.

[0013] In some embodiments, the radar water level module includes a radar water level module, a differential amplifier module, a second frequency selective amplifier module and an emitter follower module for transmitting and receiving radar ranging signals; one end of the differential amplifier module is connected to the radar water level module, and the other end of the differential amplifier module is connected to one end of the second frequency selective amplifier module; one end of the emitter follower module is connected to the other end of the second frequency selective amplifier module, and the other end of the emitter follower module is connected to the main control module.

[0014] In some embodiments, the differential amplifier module is configured to convert the distance measurement data signal corresponding to the radar ranging signal into a single-ended signal and amplify it; the second frequency selective amplifier module is configured to perform frequency selective filtering and amplification on the single-ended signal; the emitter follower module is configured to increase the input impedance and send the radar speed measurement signal processed by the second frequency selective amplifier module to the main control module.

[0015] In some embodiments, when the radar flow rate module and the radar water level module are turned on, the main control module simultaneously turns off the ultrasonic velocity measurement module; when the ultrasonic velocity measurement module is turned on, the main control module simultaneously turns off the radar flow rate module and the radar water level module.

[0016] Implementing one of the above-mentioned technical solutions of the utility model has the following advantages or beneficial effects: the utility model obtains the pressure value through the pressure sensor, and the main control module controls the radar flow rate module and the radar water level module to measure the pipeline flow rate and water level based on the pressure value, or measures the water level based on the pressure value and controls the ultrasonic velocity measurement module to measure the pipeline flow rate, thereby improving the flexibility and accuracy of the water level measurement of the cellar well pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1This is a structural block diagram of a radar and ultrasonic integrated machine applied to a pit pipe according to an embodiment of the present utility model;

[0019] Figure 2 This is a circuit diagram of a drive circuit module, a voltage conversion and boosting module, and an impedance matching module according to an embodiment of the present invention;

[0020] Figure 3 This is a circuit diagram of a PWM module according to an embodiment of the present invention;

[0021] Figure 4 1 is a circuit diagram of a transmitting power supply circuit according to an embodiment of the present utility model;

[0022] Figure 5 1 is a circuit diagram of a signal processing module according to an embodiment of the present invention;

[0023] Figure 6 1 is a circuit diagram of a bandpass filter module according to an embodiment of the present invention;

[0024] Figure 7 1 is a circuit diagram of an amplifying module according to an embodiment of the present utility model;

[0025] Figure 8 1 is a circuit diagram of a frequency mixing circuit module according to an embodiment of the present invention;

[0026] Figure 9 This is a circuit diagram of a clock chip module and a pressure sensor according to an embodiment of the present utility model;

[0027] Figure 10 1 is a circuit diagram of a low-pass filter module according to an embodiment of the present invention;

[0028] Figure 11 1 is a circuit diagram of an emitter follower according to an embodiment of the present invention;

[0029] Figure 12 This is a circuit diagram of the first frequency-selective amplification module of an embodiment of the present utility model;

[0030] Figure 13 1 is a circuit diagram of a PGA module according to an embodiment of the present invention;

[0031] Figure 14 1 is a circuit diagram of the connector J6 according to an embodiment of the present invention;

[0032] Figure 15 1 is a circuit diagram of a differential amplifier module according to an embodiment of the present invention;

[0033] Figure 16 1 is a circuit diagram of a reference voltage circuit according to an embodiment of the present invention;

[0034] Figure 17 Schematic diagram of the circuit of the conversion module of the embodiment of the present utility model.

[0035] In the figure: 1. Main control module; 10. Ultrasonic velocity measurement module; 12. Ultrasonic receiving unit; 120. Ultrasonic receiving probe; 121. Band-pass filter module; 122. Amplification module; 123. Mixing circuit module; 124. Clock chip module; 125. Low-pass filter module; 11. Ultrasonic transmitting unit; 110. Ultrasonic transmitting probe; 111. Impedance matching module; 112. Voltage transformer and boost module; 113. Driving circuit module; 20. Radar flow rate module; 200. Radar flow rate module; 201. First frequency selection amplifier module; 202. PGA module; 30. Radar water level module; 300. Radar water level module; 301. Differential amplifier module; 302. Second frequency selection amplifier module; 303. Emitter follower module; 40. Pressure sensor. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, in which various exemplary embodiments that may be used to implement the present invention are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods and devices that are consistent with some aspects of the present disclosure as detailed in the appended claims, and other embodiments may also be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and essence of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", etc. indicate the orientation or position relationship based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation, be constructed and operate in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.

[0039] The utility model provides a radar and ultrasonic integrated machine (not shown) applied to a pit pipe.

[0040] In some embodiments, as Figure 1 As shown, the radar and ultrasonic integrated device can include a radar flow velocity module 20, a radar water level module 30, an ultrasonic velocity measurement module 10, a pressure sensor 40, and a main control module 1. The radar and ultrasonic integrated device can be installed in a cellar well pipeline, for example, above the cellar well pipeline, and can be used to measure the water level and flow velocity in the cellar well pipeline.

[0041] In some embodiments, the main control module 1 can be connected to the radar flow velocity module 20 , the radar water level module 30 , the ultrasonic velocity measurement module 10 and the pressure sensor 40 .

[0042] In some embodiments, the radar flow velocity module 20 can measure the flow velocity of the manhole pipe in a non-contact manner by transmitting / receiving radar velocity measurement signals. The radar water level module 30 can measure the water level of the manhole pipe in a non-contact manner by transmitting / receiving radar ranging signals.

[0043] In some embodiments, the ultrasonic velocity measurement module 10 can measure the flow velocity of the manhole pipe by contact, and the ultrasonic velocity measurement module 10 can measure the flow velocity of the pipe by transmitting / receiving ultrasonic signals. The ultrasonic signal can include an ultrasonic transmission signal and an ultrasonic reflection signal.

[0044] In some embodiments, the pressure sensor 40 can be used to measure pressure. The pressure sensor 40 can measure the pressure of the water body and convert the pressure value into an electrical signal. The pressure sensor 40 can transmit the electrical signal to the main control module 1.

[0045] In some embodiments, the main control module 1 can be used to receive and process signals collected by various modules to obtain various data. For example, the main control module 1 can receive and analyze ultrasonic signals collected by the ultrasonic velocity measurement module 10 to obtain pipeline flow velocity data. The main control module 1 can also send control instructions to each module, causing it to operate according to the control instructions, such as transmitting or collecting various signals.

[0046] In some embodiments, the main control module 1 can be used to receive a pressure value, and based on the pressure value, control the radar flow rate module 20 to measure the pipeline flow rate of the cellar pipe, and control the radar water level module 30 to measure the water level height of the cellar pipe, or measure the water level height, and control the ultrasonic velocity measurement module 10 to measure the pipeline flow rate.

[0047] In some embodiments, when the pressure value measured by the pressure sensor 40 is less than a preset threshold, the main control module 1 can control the radar flow velocity module 20 to measure the flow velocity in the well pipe, and control the radar water level module 30 to measure the water level in the well pipe. In some embodiments, when the pressure value measured by the pressure sensor 40 is greater than or equal to a preset threshold, the main control module 1 can switch to controlling the pressure sensor 40 to measure the water level, and control the ultrasonic velocity measurement module 10 to measure the flow velocity in the pipe.

[0048] In some embodiments, the preset threshold value may be 270 Pa to 330 Pa. For example, the preset threshold value may be 270 Pa, 280 Pa, 290 Pa, 300 Pa, 310 Pa, 320 Pa, or 330 Pa.

[0049] In some embodiments, when the pressure sensor 40 does not measure a pressure value or the measured pressure value is less than a preset threshold, the main control module 1 can control the radar flow velocity module 20 to measure the flow velocity in the well pipe, while simultaneously controlling the radar water level module 30 to measure the water level in the well pipe. As the water level in the well pipe rises, when the pressure value measured by the pressure sensor 40 is greater than or equal to the preset threshold, the main control module 1 can switch to controlling the pressure sensor 40 to measure the water level and the ultrasonic velocity measurement module 10 to measure the flow velocity in the pipe. In this case, when the well pipe is at a low water level and low flow rate, due to the high-altitude limitations of ultrasonic signal measurement, the radar flow velocity module 20 can be used to measure the flow velocity, while the radar water level module 30 can be used to measure the water level, thereby achieving more accurate measurements. Furthermore, due to the blind spots of radar signal measurement, switching to using the pressure sensor 40 to measure the water level and controlling the ultrasonic velocity measurement module 10 to measure the flow velocity in the pipe can ensure high precision and accuracy in both the water level and flow velocity data.

[0050] In some embodiments, when the radar flow velocity module 20 and the radar water level module 30 are enabled, the main control module 1 can simultaneously disable the ultrasonic velocity measurement module 10. Correspondingly, when the ultrasonic velocity measurement module 10 is enabled, the main control module 1 can simultaneously disable the radar flow velocity module 20 and the radar water level module 30. In this case, the modules can be switched promptly during measurement, reducing the impact of each module on the other and saving power.

[0051] In some embodiments, the main control module 1 can switch between various modules in real time based on the real-time pressure value measured by the pressure sensor 40, for example, switching from using the radar flow velocity module 20 to using the ultrasonic velocity measurement module 10 to measure the pipeline flow velocity in real time.

[0052] In some embodiments, the main control module 1 may be an MCU chip, and the model of the main control module 1 may be STM32L486.

[0053] In some embodiments, the ultrasonic velocity measurement module 10 may include an ultrasonic transmitter 11. The ultrasonic transmitter 11 may transmit an ultrasonic transmission signal for measuring the flow velocity of the pipeline based on a control instruction of the main control module 1.

[0054] In some embodiments, the ultrasound transmitting unit 11 may include a driving circuit module 113 , a voltage transformation and boosting module 112 for providing an AC voltage, an impedance matching module 111 , and an ultrasound transmitting probe 110 .

[0055] In some embodiments, one end of the drive circuit module 113 can be connected to the main control module 1, and the other end of the drive circuit module 113 can be connected to one end of the transformer and boost module 112. The drive circuit module 113 can be configured to receive a PWM signal from the main control module 1 and control the switching action of the transformer and boost module 112 based on the PWM signal.

[0056] In some embodiments, as Figure 2 As shown, the drive circuit module 113 may include a resistor R164, a resistor R301, a chip U25, a resistor R165, a resistor R300, a resistor R302, a capacitor C263, and a capacitor C264. Pins 1, 3, and 8 of the chip U25 are all grounded. One end of the resistor R164 can be connected to port PWM1 for receiving a PWM signal; the other end of the resistor R164 can be connected to pin 2 of the chip U25. One end of the resistor R301 can be connected to port PWM2 for receiving a PWM signal; the other end of the resistor R301 can be connected to pin 4 of the chip U25. One end of the resistor R165 can be connected to pin 7 of the chip U25, and the other end of the resistor R165 can be connected to one end of the capacitor C263, the other end of which is grounded. One end of the resistor R300 can be connected to pin 6 of the chip U25, and the other end of the resistor R300 can be connected to a power supply voltage. One end of the resistor R302 can be connected to pin 5 of the chip U25, and the other end of the resistor R302 can be connected to one end of the capacitor C264, where the other end of the capacitor C264 is grounded.

[0057] In some embodiments, the capacitor C263 and the capacitor C264 may be 0.1 μF. The chip U25 may be of type UCC27324D.

[0058] In some embodiments, one end of the impedance matching module 111 can be connected to the other end of the transformer and boost module 112, and the other end of the impedance matching module 111 can be connected to the ultrasonic transmitter probe 110. The impedance matching module 111 can be used to match the LC impedance of the transformer and boost module 112 and convert the transmission waveform into a sine wave signal; the ultrasonic transmitter probe 110 can receive the sine wave signal, convert the sine wave signal into an ultrasonic transmission signal, and transmit it.

[0059] In some embodiments, as Figure 2 As shown, the voltage transformation and boost module 112 may include a half-bridge MOS transistor Q11 , a capacitor C265 , a capacitor CE3 , a resistor R162 , a resistor R163 and a transformer T1 .

[0060] In some embodiments, the half-bridge MOS transistor Q11 may include two NMOS transistors. The source S1 of one NMOS transistor may be the first terminal of the half-bridge MOS transistor Q11, the gate G1 may be the second terminal of the half-bridge MOS transistor Q11, the drain D1_1 may be the eighth terminal of the half-bridge MOS transistor Q11, and the drain D1_2 may be the seventh terminal of the half-bridge MOS transistor Q11. The source S2 of the other NMOS transistor may be the third terminal of the half-bridge MOS transistor Q11, the gate G2 may be the fourth terminal of the half-bridge MOS transistor Q11, the drain D2_1 may be the fifth terminal of the half-bridge MOS transistor Q11, and the drain D2_2 may be the sixth terminal of the half-bridge MOS transistor Q11.

[0061] In some embodiments, the first and third terminals of the half-bridge MOS transistor Q11 can be grounded; the second terminal of the half-bridge MOS transistor Q11 can be connected to the other terminal of the resistor R165, and the fourth terminal of the half-bridge MOS transistor Q11 can be connected to the other terminal of the resistor R302; the fifth and sixth terminals of the half-bridge MOS transistor Q11 can be connected to the second terminal of the transformer T1; and the seventh and eighth terminals of the half-bridge MOS transistor Q11 can be connected to the port TXD1 and one terminal of the capacitor C265. Port TXD1 can be used to output a square wave signal.

[0062] In some embodiments, the third and fourth ends of the transformer T1 can be connected to the impedance matching module 111; the fifth end of the transformer T1 can be connected to one end of the resistor R162, one end of the resistor R163, and one end of the capacitor CE3, the other end of the resistor R162 and the other end of the resistor R163 are both connected to the power supply voltage, and the other end of the capacitor CE3 is grounded.

[0063] In some embodiments, the model of the half-bridge MOS transistor Q11 may be SSG9904, and the model of the transformer T1 may be JC050125A.

[0064] In some embodiments, as Figure 2 As shown, the impedance matching module 111 may include a resistor R166, a capacitor C266, a capacitor C267, and a connector J4. The two ends of the resistor R166, the two ends of the capacitor C266, and the two ends of the capacitor C267 may be connected to the third end and the fourth end of the transformer T1, respectively. The third end of the transformer T1 may be connected to the first end of the connector J4, and the fourth end of the transformer T1 may be connected to the second end of the connector J4. One end of the resistor R166 may be connected to the port TX_P1; one end of the capacitor C267 may be connected to the power supply voltage, and the other end of the capacitor C267 may be grounded and may be connected to both the first end of the connector J4 and the port TX_P1. The ports TX_P1 and TX_P1 may send a sinusoidal wave signal to the ultrasonic transmitting probe 110.

[0065] In some embodiments, the ultrasonic transmitter 11 may include a PWM module for providing a PWM signal. The PWM module may be connected to the drive circuit module 113 and the main control module 1. The PWM module may send the PWM signal to the drive circuit module 113 based on the control instruction of the main control module 1.

[0066] In some embodiments, as Figure 3 As shown, the PWM module may include resistor R146, resistor R147, resistor R152, resistor R153, resistor R154, resistor R156, resistor R159, resistor R157, resistor R158, capacitor C260, capacitor C261, capacitor C262, feedback element FB21 and chip U24.

[0067] In some embodiments, pin 1 of chip U24 can be connected to one end of resistor R146, wherein the other end of resistor R146 can be connected to one end of resistor R154, one end of resistor R152 and TXD_EN1 port of main control module 1, the other end of resistor R152 is grounded, and the other end of resistor R154 can be connected to the power supply voltage; pin 2 of chip U24 can be connected to one end of resistor R147, wherein the other end of resistor R147 can be connected to one end of resistor R153 and Y1_CLOCK port of main control module 1, and the other end of resistor R153 can be connected to the other end of resistor R154 and the power supply voltage; pin 3, pin 4 and pin 5 of chip U24 can all be connected to one end of resistor R156, wherein the other end of resistor R156 can be connected to port PWM1; chip U Pin 6 of chip U24 can be connected to one end of resistor R159, wherein the other end of resistor R159 can be connected to port PWM2; pin 7 of chip U24 is grounded; pin 9, pin 10 and pin 11 of chip U24 are connected to each other; pin 12 and pin 13 of chip U24 can both be connected to one end of resistor R157 and one end of resistor R158, wherein the other end of resistor R157 is grounded, and the other end of resistor R158 can be connected to the power supply voltage; pin 14 of chip U24 can be connected to one end of capacitor C260, one end of capacitor C261, one end of capacitor C262 and one end of feedback element FB21, wherein the other end of feedback element FB21 can be connected to the power supply voltage, and the other end of capacitor C261 can be connected to the other end of capacitor C260 and the other end of capacitor C262 and grounded.

[0068] In some embodiments, chip U24 may include four NAND gate logic circuits. The first NAND gate logic circuit has one input terminal 1A connected to pin 1 of chip U24, another input terminal 1B connected to pin 2 of chip U24, and an output terminal 1Y connected to pin 3 of chip U24. The second NAND gate logic circuit has one input terminal 2A connected to pin 4 of chip U24, another input terminal 2B connected to pin 5 of chip U24, and an output terminal 2Y connected to pin 6 of chip U24. The third NAND gate logic circuit has one input terminal 3A connected to pin 9 of chip U24, another input terminal 3B connected to pin 10 of chip U24, and an output terminal 3Y connected to pin 8 of chip U24. The fourth NAND gate logic circuit has one input terminal 4A connected to pin 12 of chip U24, another input terminal 4B connected to pin 13 of chip U24, and an output terminal 4Y connected to pin 11 of chip U24. The model number of chip U24 may be SN74AHC00DR.

[0069] In some embodiments, resistors R152, R153, R154, R157, and R158 may be 100K ohms, capacitor C260 may be 10 microfarads, capacitor C261 may be 0 microfarads, and capacitor C262 may be 0.01 microfarads.

[0070] In some embodiments, the ultrasound transmitting unit 11 may include a transmitting power circuit for providing a transmitting power switch control signal. The transmitting power circuit may be connected to the ultrasound transmitting probe 110 and control the transmitting power switch of the ultrasound transmitting probe 110 .

[0071] In some embodiments, as Figure 4 As shown, the transmitting power supply circuit may include a resistor R309, a resistor R306, a resistor R305, a resistor R307, a resistor R308, a resistor R303, a resistor R304, a capacitor C269, a capacitor C268, a capacitor CE4, a capacitor C270, a capacitor C271, a capacitor C272, a capacitor C273, a capacitor C274, a feedback element FB22, a transistor Q13, and a MOS transistor Q12.

[0072] In some embodiments, the base of transistor Q13 can be connected to port POWE_TXD_CTR, one end of resistor R309, and one end of capacitor C269. The emitter of transistor Q13 can be connected to the other end of resistor R309, one end of capacitor C269, one end of capacitor C270, one end of capacitor CE4, one end of capacitor C271, one end of capacitor C272, one end of capacitor C273, and one end of capacitor C274, and grounded. The collector of transistor Q13 can be connected to one end of resistor R306. Port POWE_TXD_CTR can be used to transmit a transmit power switch control signal.

[0073] In some embodiments, the gate of the MOS transistor Q12 may be connected to one end of the capacitor C268, one end of the resistor R307, and one end of the resistor R308, wherein the other end of the resistor R307 may be connected to the other end of the resistor R306 and one end of the resistor R305, and the other end of the resistor R308 may be connected to the other end of the capacitor C270. The source of the MOS transistor Q12 may be connected to the other end of the capacitor C268, the other end of the resistor R305, and one end of the feedback element FB22, wherein the other end of the feedback element FB22 may be connected to a power supply voltage. The drain of the MOS transistor Q12 may be connected to the other end of the capacitor CE4, the other end of the capacitor C271, the other end of the capacitor C272, one end of the resistor R303, and one end of the resistor R304, wherein the other end of the resistor R303 may be connected to the other end of the resistor R304, the other end of the capacitor C273, the other end of the capacitor C274, and the power supply voltage.

[0074] In some embodiments, the model of the transistor Q13 may be LMUN2213LT1G, and the model of the MOS transistor Q12 may be APM2301CAC-TR.

[0075] In some embodiments, resistor R305 may be 100K ohms, resistor R306 may be 100K ohms, and resistor R309 may be 10K ohms. Capacitor C269 may be 0.1 microfarads, capacitor C270 may be 0.1 microfarads, capacitor CE4 may be 220 microfarads, capacitor C271 may be 4.7 microfarads, capacitor C272 may be 0.1 microfarads, capacitor C273 may be 4.7 microfarads, and capacitor C274 may be 0.1 microfarads.

[0076] In some embodiments, the ultrasonic velocity measurement module 10 may include an ultrasonic receiving unit 12. The ultrasonic receiving unit 12 may include an ultrasonic receiving probe 120 for receiving ultrasonic reflection signals, a bandpass filter module 121, an amplification module 122, a mixing circuit module 123, a low-pass filter module 125, and a clock chip module 124 for generating a local oscillation signal.

[0077] In some embodiments, the ultrasound receiving unit 12 may further include a signal processing module. The signal processing module may be connected to the ultrasound receiving probe 120 to receive the ultrasonic reflection signal sent by the ultrasound receiving probe 120 ; the signal processing module may be connected to the bandpass filtering module 121 .

[0078] In some embodiments, as Figure 5As shown, the signal processing module may include resistor R171, resistor R173, resistor R174, resistor R175, resistor R185, resistor R192, resistor R193, resistor R194, resistor R269, capacitor C147, capacitor C160, capacitor C161, capacitor C217, capacitor C231, capacitor C233, connector J8, diode D14, feedback element FB27 and transistor Q39.

[0079] In some embodiments, a first end of the connector J8 is grounded, and a second end of the connector J8 can be connected to one end of the resistor R192 and an anode of the diode D14 , wherein the anode of the diode D14 is grounded.

[0080] In some embodiments, one end of resistor R174 can be connected to both port TIM3_CH2 and one end of capacitor C233, where one end of capacitor C233 is grounded. The other end of resistor R174 can be connected to both one end of capacitor C231 and one end of capacitor C161, where the other end of capacitor C231 is grounded. Port TIM3_CH2 can be used to transmit ultrasonic reflection signals.

[0081] In some embodiments, one end of resistor R173 can be connected to the other end of capacitor C161, and the other end of resistor R173 can be connected to the other end of resistor R192, one end of resistor R171 and one end of capacitor C160, where the other end of resistor R171 is grounded.

[0082] In some embodiments, the collector of the transistor Q39 can be connected to one end of the capacitor C217, one end of the resistor R185, and one end of the feedback element FB27, wherein the other end of the capacitor C217 is grounded, and the other end of the feedback element FB27 is connected to the power supply voltage; the base of the transistor Q39 can be connected to the other end of the capacitor C160, the other end of the resistor R185, one end of the resistor R175, and one end of the resistor R194; the emitter of the transistor Q39 can be connected to the other end of the resistor R194, one end of the capacitor C147, and one end of the resistor R269, wherein the other end of the resistor R269 is grounded, and the other end of the capacitor C147 can be connected to the bandpass filter module 121.

[0083] In some embodiments, one end of the resistor R193 may be connected to the other end of the resistor R175 , and the other end of the resistor R193 is grounded.

[0084] In some embodiments, resistor R173 may be 100K ohms, resistor R185 may be 10K ohms, resistor R171 may be 1K ohms, resistor R193 may be 10K ohms, and resistor R269 may be 1K ohms. Capacitor C233 may be 0.1 microfarads, capacitor C231 may be 0.1 microfarads, capacitor C160 may be 1 microfarad, capacitor C217 may be 0.1 microfarads, and capacitor C147 may be 1 microfarad.

[0085] In some embodiments, one end of the bandpass filter module 121 may be connected to the ultrasound receiving probe 120, and the other end of the bandpass filter module 121 may be connected to the amplification module 122. The bandpass filter module 121 may be configured to filter the ultrasonic reflection signal to obtain a filtered signal, and send the filtered signal to the amplification module 122.

[0086] In some embodiments, the bandpass filter module 121 can be a narrowband filter circuit constructed using a low-noise operational amplifier. The bandpass filter module 121 allows signals within the frequency band to pass through while suppressing signals outside the frequency band. This improves the signal-to-noise ratio of the useful signal.

[0087] In some embodiments, as Figure 6 As shown, the bandpass filter module 121 may include a chip U22, a resistor R168, a resistor R169, a resistor R170, a resistor R172, a resistor R182, a resistor R190, a resistor R250, a resistor R251, a resistor R252, a capacitor C143, a capacitor C144, a capacitor C145, a capacitor C148, a capacitor C150, a capacitor C151, a capacitor C199, a capacitor C200 and a feedback element FB26.

[0088] In some embodiments, one end of resistor R168 is grounded, and the other end of resistor R168 can be connected to one end of resistor R250 and one end of resistor R251. One end of resistor R182 can be connected to one end of capacitor C151, and the other end of resistor R182 can be connected to the other end of capacitor C147. One end of capacitor C145 can be connected to the other end of resistor R250 and one end of resistor R190, and the other end of capacitor C145 is grounded. One end of resistor R252 can be connected to one end of resistor R182, one end of capacitor C151, and one end of capacitor C148, and the other end of resistor R252 is grounded.

[0089] In some embodiments, one end of the feedback element FB26 may be connected to the other end of the resistor R251 and one end of the resistor R170 , and the other end of the feedback element FB26 may be connected to the power supply voltage.

[0090] In some embodiments, pin 2 of chip U22 can be connected to the other end of capacitor C151 and one end of capacitor C148; pin 3 of chip U22 can be connected to the other end of resistor R190; pin 4 of chip U22 is grounded; pin 6 of chip U22 can be connected to one end of resistor R172, the other end of resistor R169 and the other end of capacitor C148; pin 7 of chip U22 can be connected to one end of capacitor C144, one end of capacitor C150, one end of capacitor C143 and one end of resistor R170, and the other end of capacitor C144, the other end of capacitor C150 and the other end of capacitor C143 are all grounded; pin 8 of chip U22 can be connected to the other end of resistor R170.

[0091] In some embodiments, one end of capacitor C200 can be connected to the other end of resistor R172 and one end of capacitor C199, and the other end of capacitor C200 can be grounded. The other end of capacitor C199 can be connected to port OP1 and the input end of amplifier module 122, where a signal after bandpass amplification can be generated at port OP1.

[0092] In some embodiments, resistor R168 may be 10K ohms, resistor R182 may be 1.6K ohms, resistor R251 may be 10K ohms, and resistor R252 may be 1.6K ohms. Capacitor C151 may be 47 pF, capacitor C145 may be 1 microfarad, capacitor C148 may be 47 pF, capacitor C143 may be 4.7 microfarad, capacitor C150 may be 0.1 microfarad, capacitor C144 may be 100 pF, capacitor C199 may be 1 microfarad, and capacitor C200 may be 470 pF.

[0093] In some embodiments, the amplification module 122 may be configured to amplify the filtered signal to obtain an amplified signal, and send the amplified signal to the mixing circuit module 123 .

[0094] In some embodiments, amplification module 122 may be an RC series-parallel frequency-selective amplifier circuit constructed using a low-noise operational amplifier. The upper and lower sidebands of the selected frequency can be determined by f = 1 / 2πRC. Amplification module 122 can amplify signals within the desired frequency band and suppress signals outside the frequency band, thereby improving the signal-to-noise ratio of the desired signal and amplifying the signal waveform to facilitate subsequent signal processing.

[0095] In some embodiments, as Figure 7As shown, the amplification module 122 may include a resistor R176, a resistor R240, a resistor R241, a resistor R242, a resistor R253, a resistor R255, a resistor R258, a resistor R259, a resistor R260, a resistor R261, a resistor R290, a resistor R291, a resistor R292, a resistor R293, a resistor R294, a resistor R295, a resistor R296, a resistor R297, a resistor R298, a capacitor C135, a capacitor C140, a capacitor C141, a capacitor C136, a capacitor C147, a capacitor C148, a capacitor C149, a capacitor C150, a capacitor C151, a capacitor C152, a capacitor C153, a capacitor C154, a capacitor C155, a capacitor C156, a capacitor C157, a capacitor C158, a capacitor C159, a capacitor C160, a capacitor C161, a capacitor C162, a resistor C163, a resistor C164, a resistor C165, a resistor C166, a resistor C167, a capacitor C168, a capacitor C169, a capacitor C170, a capacitor C171, a resistor C172, a resistor C173, a resistor Capacitor C142, capacitor C152, capacitor C153, capacitor C154, capacitor C155, capacitor C156, capacitor C157, capacitor C158, capacitor C165, capacitor C218, capacitor C219, capacitor C220, capacitor C221, capacitor C222, capacitor C223, capacitor C226, capacitor C227, capacitor C229, feedback element FB36, feedback element FB37, feedback element FB38, chip U18, chip U28 and chip U29.

[0096] In some embodiments, one end of resistor R290 is grounded and can be connected to one end of capacitor C153, and the other end of resistor R290 can be connected to the other end of capacitor C153, one end of resistor R291, and one end of resistor R292.

[0097] In some embodiments, pin 1 of chip U18 can be connected to one end of resistor R253, one end of resistor R240, and one end of capacitor C165; pin 2 of chip U18 is grounded; pin 3 of chip U18 can be connected to one end of resistor R176 and the other end of resistor R292, wherein the other end of resistor R176 can be connected to capacitor C199; pin 4 of chip U18 can be connected to one end of resistor R258, the other end of resistor R240, and one end of capacitor C165; pin 5 of chip U18 can be connected to one end of capacitor C140, the other end of resistor R291, one end of capacitor C135, and one end of feedback element FB36, wherein the other end of capacitor C140 and the other end of capacitor C135 are grounded, and the other end of feedback element FB36 can be connected to the power supply voltage.

[0098] In some embodiments, one end of capacitor C219 can be connected to the other end of resistor R258, with the other end of capacitor C219 grounded. One end of capacitor C218 can be connected to the other end of resistor R253, port OP2, and one end of capacitor C220, with the other end of capacitor C218 grounded. The signal at port OP2 can be the signal at port OP1 after frequency selective amplification.

[0099] In some embodiments, one end of resistor R293 is grounded and can be connected to one end of capacitor C155, and the other end of resistor R293 can be connected to the other end of capacitor C155, one end of resistor R294, and one end of resistor R295.

[0100] In some embodiments, pin 1 of chip U28 can be connected to one end of resistor R255, one end of resistor R241, and one end of capacitor C158; pin 2 of chip U28 is grounded; pin 3 of chip U28 can be connected to the other end of resistor R295 and the other end of capacitor C220; pin 4 of chip U28 can be connected to one end of resistor R259, the other end of resistor R241, and the other end of capacitor C158; pin 5 of chip U28 can be connected to one end of capacitor C141, the other end of resistor R294, one end of capacitor C142, and one end of feedback element FB37, wherein the other end of capacitor C141 and the other end of capacitor C142 are both grounded, and the other end of feedback element FB37 can be connected to the power supply voltage.

[0101] In some embodiments, one end of capacitor C222 can be connected to the other end of resistor R259, and the other end of capacitor C222 can be grounded. One end of capacitor C221 can be connected to the other end of resistor R255, port OP3, and one end of capacitor C223, and the other end of capacitor C218 can be grounded. The other end of capacitor C223 is connected to port RF_IN_P. The signal at port OP3 can be the signal at port OP2 after frequency selective amplification, and the signal at port OP3 can be a non-inverting amplified signal.

[0102] In some embodiments, one end of resistor R297 is grounded and can be connected to one end of capacitor C156, and the other end of resistor R297 can be connected to the other end of capacitor C156, one end of resistor R296 and one end of resistor R298.

[0103] In some embodiments, pin 1 of chip U29 can be connected to one end of resistor R260, one end of resistor R242, and one end of capacitor C157; pin 2 of chip U29 is grounded; pin 3 of chip U29 can be connected to the other end of resistor R298; pin 4 of chip U29 can be connected to one end of resistor R261, the other end of resistor R242, and the other end of capacitor C157; pin 5 of chip U29 can be connected to one end of capacitor C154, the other end of resistor R296, one end of capacitor C152, and one end of feedback element FB38, wherein the other end of capacitor C154 and the other end of capacitor C152 are both grounded, and the other end of feedback element FB38 can be connected to the power supply voltage.

[0104] In some embodiments, one end of capacitor C227 can be connected to the other end of resistor R261, and the other end of capacitor C222 can be connected to port OP2. One end of capacitor C226 can be connected to the other end of resistor R260, port OP4, and one end of capacitor C229. The other end of capacitor C226 is grounded. The other end of capacitor C223 is connected to output terminal RF_IN_N. The signal at port OP4 can be the signal at port OP2 after frequency selective amplification, and the signal at port OP3 can be an inverted amplified signal. The signal at port OP3 and the signal at port OP4 can be a set of pseudo-differential signals.

[0105] In some embodiments, resistor R290 may be 10K ohms, resistor R291 may be 10K ohms, resistor R258 may be 1K ohms, resistor R240 may be 15K ohms, resistor R293 may be 10K ohms, resistor R294 may be 10K ohms, resistor R259 may be 1K ohms, resistor R241 may be 15K ohms, resistor R297 may be 10K ohms, and resistor R242 may be 18K ohms. Capacitor C153 may be 0.1 microfarads, capacitor C135 may be 4.7 microfarads, capacitor C140 may be 0.1 microfarads, capacitor C165 may be 47 picofarads, capacitor C219 may be 0.1 microfarads, capacitor C218 may be 47 picofarads, capacitor C155 may be 0.1 microfarads, capacitor C142 may be 4.7 microfarads, capacitor C141 may be 4.7 microfarads, capacitor C158 may be 47 picofarads, capacitor C221 may be 47 picofarads, capacitor C223 may be 1 microfarad, capacitor C156 may be 0.1 microfarads, capacitor C152 may be 4.7 microfarads, capacitor C154 may be 0.1 microfarads, capacitor C157 may be 47 picofarads, capacitor C226 may be 47 picofarads, and capacitor C229 may be 1 microfarad.

[0106] In some embodiments, the chip U18, the chip U28, and the chip U29 may be of the model ADA4891-1ARJZ-R7.

[0107] In some embodiments, the frequency mixing circuit module 123 may be connected to the amplification module 122, the clock chip module 124, and the low-pass filter module 125. The frequency mixing circuit module 123 may be configured to receive a local oscillator signal from the clock chip module 124 and mix the amplified signal received from the amplification module 122 into a mixed signal based on the local oscillator signal.

[0108] In some embodiments, the mixing circuit module 123 can mix the signal fi received by the ultrasound receiving probe 120 into an intermediate frequency signal or a low frequency signal fi-fs through the local oscillator signal fs generated by the clock chip module 124, so as to facilitate direct acquisition and processing by the microcontroller ADC.

[0109] In some embodiments, as Figure 8 As shown, the mixing circuit module 123 may include resistor R196, resistor R197, resistor R198, resistor R200, resistor R203, resistor R204, resistor R207, resistor R208, resistor R209, resistor R212, resistor R939, capacitor C176, capacitor C178, capacitor C179, capacitor C181, capacitor C182, capacitor C184, capacitor C185, capacitor C186, capacitor C188, capacitor C189, capacitor C190, capacitor C191, capacitor C192, capacitor C195, capacitor C895, inductor L7, inductor L8, feedback element FB31, feedback element FB32, chip U20 and chip U21.

[0110] In some embodiments, pin 1 of chip U20 can be connected to one end of capacitor C186, wherein the other end of capacitor C186 can be connected to port MIXER_IN and one end of resistor R93, and the other end of resistor R93 is grounded; pin 2 of chip U20 can be connected to one end of resistor R197, wherein the other end of resistor R197 can be connected to one end of capacitor C176, one end of capacitor C178, one end of capacitor C181 and one end of feedback element FB31; pin 3 of chip U20 can be connected to one end of capacitor C188 and one end of inductor L8, wherein the other end of capacitor C188 can be connected to port RF_IN_P, and the other end of inductor L8 is grounded; pin 4 of chip U20 can be connected to one end of capacitor C190 and inductor L 7, wherein the other end of capacitor C190 can be connected to port RF_IN_N, and the other end of inductor L7 is grounded; pin 5 of chip U20 can be connected to one end of resistor R198 and one end of capacitor C191; pin 6 of chip U20 can be connected to one end of resistor R203 and one end of capacitor C189; pin 7 of chip U20 can be connected to one end of capacitor C176, one end of capacitor C178, one end of capacitor C181, and one end of feedback element FB31, wherein the other end of capacitor C176, the other end of capacitor C178, and the other end of capacitor C181 are all grounded; pin 8 of chip U20 can be connected to one end of capacitor C184, and pin 9 of chip U20 can be connected to the other end of capacitor C184. Port MIXER_IN can be used to receive the local oscillator signal of clock chip module 124.

[0111] In some embodiments, one end of the resistor R204 may be connected to one end of the resistor R196, and the other end of the resistor R204 may be grounded. One end of the capacitor C185 may be connected to one end of the resistor R196, and the other end of the capacitor C185 may be grounded.

[0112] In some embodiments, pin 1 of chip U21 can be connected to one end of capacitor C192, one end of resistor R212, and one end of capacitor C195; pin 2 of chip U21 is grounded; pin 3 of chip U21 can be connected to one end of resistor R207 and one end of resistor R200, wherein the other end of resistor R207 can be connected to the other end of capacitor C191, and the other end of resistor R200 can be connected to one end of resistor R204, one end of capacitor C185, and one end of resistor R196; pin 4 of chip U21 can be connected to the other end of resistor R212 , the other end of capacitor C195 and one end of resistor R208 are all connected, wherein the other end of resistor R208 can be connected to the other end of capacitor C191; Pin 5 of chip U21 can be connected to the other end of resistor R196, one end of capacitor C179, one end of capacitor C182, one end of capacitor C895 and one end of feedback element FB32, wherein the other end of feedback element FB32 can be connected to the other end of feedback element FB31 and the power supply voltage, and the other end of capacitor C179, the other end of capacitor C182 and the other end of capacitor C895 are all grounded. In some embodiments, one end of resistor R209 can be connected to the other end of capacitor C192, and the other end of resistor R209 can be connected to port MIXER_OUT. Port MIXER_OUT can be used to send a mixed signal to low-pass filtering module 125.

[0113] In some embodiments, resistor R197 may be 10K ohms, resistor R203 may be 200 ohms, resistor R198 may be 200 ohms, resistor R196 may be 10K ohms, resistor R204 may be 10K ohms, and resistor R212 may be 10 ohms. Capacitor C184 may be 1 microfarad, capacitor C186 may be 1 microfarad, capacitor C188 may be 1 microfarad, capacitor C190 may be 1 microfarad, capacitor C176 may be 10 microfarad, capacitor C178 may be 0.1 microfarad, capacitor C181 may be 100 pF, capacitor C191 may be 1 microfarad, capacitor C185 may be 1 microfarad, capacitor C179 may be 4.7 microfarad, capacitor C182 may be 100 pF, capacitor C895 may be 0.1 microfarad, capacitor C195 may be 47 pF, and capacitor C192 may be 1 microfarad.

[0114] In some embodiments, the model of chip U20 may be LT5560, and the model of chip U21 may be ADA4891-1ARJZ-R7.

[0115] In some embodiments, as Figure 9As shown, the clock chip module 124 may include resistor R215, resistor R216, resistor R279, resistor R280, resistor R345, capacitor C192, capacitor C202, capacitor C203, capacitor C204, capacitor C205, capacitor C206, capacitor C234, capacitor C235, capacitor C236, capacitor C239, capacitor C386, capacitor C387, feedback element FB39, feedback element FB40, chip U46 and crystal resonator Y4.

[0116] In some embodiments, the first end of the crystal resonator Y4 can be connected to one end of the capacitor C387, one end of the resistor R345 and the port XA; the third end of the crystal resonator Y4 can be connected to one end of the capacitor C386, one end of the resistor R345 and the port XB; the second end and the fourth end of the crystal resonator Y4 can both be connected to the other end of the capacitor C386 and the other end of the capacitor C387, and be grounded.

[0117] In some embodiments, pin 1 of chip U46 can be connected to one end of capacitor C234, one end of capacitor C235, one end of capacitor C236 and one end of feedback element FB39, wherein the other end of capacitor C234, the other end of capacitor C235 and the other end of capacitor C236 are all grounded, and the other end of feedback element FB39 is connected to the power supply voltage; pin 2 of chip U46 can be connected to port XA, and pin 3 of chip U46 can be connected to port XB; pin 4 of chip U46 can be connected to one end of resistor R215; pin 5 of chip U46 can be connected to one end of resistor R216; pin 6 of chip U46 can be connected to one end of capacitor C206; pin 7 of chip U46 can be connected to one end of capacitor C239 and feedback element One end of the feedback element FB40 is connected, wherein the other end of the capacitor C239 can be connected to the other end of the capacitor C206 and grounded, and the other end of the feedback element FB40 can be connected to the power supply voltage; pin 8 of the chip U46 is grounded; pin 9 of the chip U46 can be connected to one end of the capacitor C203 and one end of the capacitor C205, wherein the other end of the capacitor C203 can be connected to the port Y1_CLOCK, and the other end of the capacitor C205 is grounded; pin 10 of the chip U46 can be connected to one end of the capacitor C202 and one end of the capacitor C204, wherein the other end of the capacitor C204 can be connected to the other end of the capacitor C205 and grounded, and the other end of the capacitor C202 can be connected to the port MIXER_IN; pin 11 of the chip U46 is grounded.

[0118] In some embodiments, one end of resistor R280 can be connected to the other end of resistor R215 and port I2C_SCL3, and the other end of resistor R280 can be connected to the other end of resistor R279 and ground. One end of resistor R279 can be connected to the other end of resistor R216 and port I2C_SDA3, and the other end of resistor R279 can be connected to the other end of resistor R280 and ground. Port I2C_SCL3 is used to transmit a clock signal, and port I2C_SDA3 is used to transmit control instructions of the main control module 1.

[0119] In some embodiments, as Figure 9 As shown, the pressure sensor 40 can be integrated into the clock chip module 124. Chip U46 can be the pressure sensor 40, and the model of chip U46 can be MS5351M. Pin 1 of chip U46 can be a VDD pin, pin 1 of chip U46 can be an XA pin, pin 3 of chip U46 can be an XB pin, pin 4 of chip U46 can be an SCL pin, pin 5 of chip U46 can be an SDA pin, pin 6 of chip U46 can be a CLK2 pin, pin 7 of chip U46 can be a VDDO pin, pin 8 of chip U46 can be a GND pin, pin 9 of chip U46 can be a CLK1 pin, pin 10 of chip U46 can be an XB pin, and pin 11 of chip U46 can be a PGND pin.

[0120] In some embodiments, resistor R279 may be 4.7K ohms, resistor R280 may be 4.7K ohms, capacitor C234 may be 10 microfarads, capacitor C236 may be 0.1 microfarads, capacitor C235 may be 100 picofarads, capacitor C202 may be 0.1 microfarads, capacitor C204 may be 22 picofarads, capacitor C205 may be 22 picofarads, capacitor C203 may be 0.1 microfarads, capacitor C239 may be 0.1 microfarads, capacitor C206 may be 22 picofarads, capacitor C386 may be 18 picofarads, and capacitor C387 may be 18 picofarads.

[0121] In some embodiments, the low-pass filter module 125 may be connected to the main control module 1 . The low-pass filter module 125 receives the mixed signal, filters the mixed signal, and sends the filtered mixed signal to the main control module 1 .

[0122] In some embodiments, if the input signal has a frequency of fi and the local oscillator signal has a frequency of fs, after passing through the mixer circuit module 123, an up-converted signal fi+fs and a down-converted signal fi-fs are output. The low-pass filter module 125 can filter out the up-converted signal fi+fs, retaining only the down-converted signal fi-fs that can be acquired by the microcontroller ADC.

[0123] In some embodiments, the low-pass filter module 125 can also filter out high-frequency clutter interference.

[0124] In some embodiments, the low-pass filter module 125 may be a 4th-order low-pass filter. Generally speaking, the order of a filter refers to the number of poles in the filter's transfer function. The order also determines the rate of decline in the transition region. Generally, each additional order, or pole, increases the attenuation by -20 dB Dec, or -20 dB per decade, or -6 dB Ord, or -6 dB Ord, per octave. A 4th-order low-pass filter achieves a signal attenuation of -24 dB Ord, which is lower than out-of-band signals and has a better attenuation effect, thereby improving the signal-to-noise ratio of the useful signal.

[0125] In some embodiments, as Figure 10 As shown, the low-pass filter module 125 may include resistor R126, resistor R127, resistor R136, resistor R138, resistor R218, resistor R219, resistor R220, resistor R221, resistor R222, resistor R223, resistor R224, resistor R225, resistor R226, resistor R227, resistor R228, resistor R229, capacitor C146, capacitor C213, capacitor C214, capacitor C215, capacitor C216, capacitor C140, capacitor C142, capacitor C141, capacitor C137, capacitor C145, capacitor C148, capacitor C218, capacitor C217, chip U47 and feedback element FB19.

[0126] In some embodiments, pin 1 of chip U47 can be connected to one end of resistor R218, one end of capacitor C140, and one end of capacitor C142; pin 2 of chip U47 can be connected to one end of resistor R136, the other end of capacitor C140, and the other end of resistor R218; pin 3 of chip U47 can be connected to the power supply voltage; pin 4 of chip U47 can be connected to one end of resistor R219, one end of capacitor C148, one end of capacitor C146, and one end of feedback element FB19, wherein the other end of capacitor C148 and the other end of capacitor C146 are both grounded, and the feedback element FB19 is grounded. The other end of the feed element FB19 is connected to the power supply voltage; Pin 5 of the chip U47 can be connected to one end of the capacitor C217 and one end of the resistor R226, wherein the other end of the capacitor C217 is grounded; Pin 6 of the chip U47 can be connected to one end of the resistor R227 and one end of the resistor R228, wherein the other end of the resistor R227 can be connected to one end of the capacitor C218 and grounded; Pin 7 of the chip U47 can be connected to one end of the capacitor C216, the other end of the resistor R228, and one end of the resistor R229, wherein the other end of the resistor R229 can be connected to the other end of the capacitor C218 and grounded. and port LPF_OUT; Pin 8 of chip U47 can be connected to one end of resistor R225, one end of resistor R224, and one end of capacitor C214, wherein the other end of resistor R225 can be connected to the other end of capacitor C216 and the other end of resistor R226; Pin 9 of chip U47 can be connected to the other end of resistor R224 and one end of resistor R223; Pin 10 of chip U47 can be connected to one end of capacitor C215 and one end of resistor R222, wherein the other end of capacitor C215 can be connected to the other end of resistor R223 and grounded; Pin 11 of chip U47 is grounded; pin 12 of chip U47 can be connected to the power supply voltage; pin 13 of chip U47 can be connected to one end of capacitor C141, one end of resistor R138 and one end of resistor R126, wherein the other end of resistor R126 can be connected to the other end of capacitor C142; pin 14 of chip U47 can be connected to the other end of capacitor C141, the other end of resistor R138, one end of resistor R127 and one end of resistor R221, wherein the other end of resistor R221 can be connected to the other end of resistor R222 and the other end of capacitor C214.

[0127] In some embodiments, one end of capacitor C145 can be connected to the other end of resistor R136, and the other end of capacitor C145 can be connected to port MIXER_OUT. One end of resistor R220 can be connected to the other end of resistor R219 and one end of capacitor C213, and the other end of resistor R220 can be connected to the other end of capacitor C213 and grounded. One end of capacitor C137 can be connected to the other end of resistor R221 and port LPF_OUT, and the other end of capacitor C137 is grounded. Port LPF_OUT is connected to main control module 1.

[0128] In some embodiments, resistor R136 may be 10K ohms, resistor R219 may be 10K ohms, resistor R220 may be 10K ohms, resistor R218 may be 10K ohms, resistor R126 may be 10K ohms, resistor R227 may be 10K ohms, resistor R229 may be 22 ohms, resistor R226 may be 4.7K ohms, resistor R225 may be 4.7K ohms, resistor R223 may be 10K ohms, resistor R138 may be 10K ohms, resistor R222 may be 4.7K ohms, and resistor R221 may be 4.7K ohms. Capacitor C137 may be 0.01 microfarads, capacitor C214 may be 1 nanofarad, capacitor C215 may be 1 nanofarad, capacitor C141 may be 1 nanofarad, capacitor C216 may be 1 nanofarad, capacitor C142 may be 10 microfarads, capacitor C140 may be 1 nanofarad, capacitor C218 may be 0.01 microfarads, capacitor C217 may be 1 nanofarad, capacitor C213 may be 0.1 microfarads, capacitor C148 may be 0.1 microfarads, capacitor C146 may be 0.1 microfarads, and capacitor C145 may be 10 microfarads.

[0129] In some embodiments, the model of chip U16 may be MS8094.

[0130] In some embodiments, the ultrasonic velocity measurement module 10 may further include an emitter follower. The emitter follower can reduce signal voltage loss and improve the signal-to-noise ratio. It also has a buffering effect, protecting subsequent circuits from the influence of the previous circuit. In addition, it can increase the input impedance.

[0131] In some embodiments, as Figure 11 As shown, the emitter follower may include resistor R286, resistor R287, resistor R288, resistor R243, resistor R247, capacitor C159, capacitor C134, capacitor C137, capacitor C197, feedback element FB43 and operational amplifier U16.

[0132] In some embodiments, pin 1 of the operational amplifier U16 can be connected to one end of the resistor R247 and one end of the resistor R243; pin 2 of the operational amplifier U16 can be grounded; pin 3 of the operational amplifier U16 can be connected to one end of the resistor R187; pin 4 of the operational amplifier U16 can be connected to the other end of the resistor R243; pin 5 of the operational amplifier U16 can be connected to one end of the capacitor C137, one end of the capacitor C134, one end of the feedback element FB43 and one end of the resistor R288, wherein the other end of the capacitor C137 can be connected to the other end of the capacitor C134 and grounded, and the other end of the feedback element FB43 can be connected to the power supply voltage.

[0133] In some embodiments, one end of resistor R286 can be connected to one end of capacitor C159 and grounded, and the other end of resistor R286 can be connected to the other end of capacitor C159, the other end of resistor R187, and the other end of resistor R288. One end of capacitor C197 can be connected to the other end of resistor R247, port DPL_Volt, and the DPL_Volt transmitter, and the other end of capacitor C197 can be grounded.

[0134] In some embodiments, resistor R286 can be 10K ohms, resistor R288 can be 10K ohms, resistor R287 can be 100 ohms, resistor R243 can be 100 ohms, and resistor R247 can be 100 ohms. Capacitor C159 can be 0.1 microfarads, capacitor C134 can be 4.7 microfarads, capacitor C137 can be 0.1 microfarads, and capacitor C197 can be 2.2 nanofarads. Operational amplifier U16 can be ADA4891-1ARJZ-R7.

[0135] In some embodiments, the radar flow rate module 20 may include a radar flow rate module 200 for transmitting and receiving radar velocity measurement signals, a first frequency-selective amplification module 201, and a PGA module 202. One end of the first frequency-selective amplification module 201 may be connected to the radar flow rate module 200, and the other end of the first frequency-selective amplification module 201 may be connected to the PGA module 202; the PGA module 202 may be connected to the main control module 1. The radar flow rate module 200 may obtain a flow rate measurement data signal based on the radar velocity measurement signal.

[0136] In some embodiments, the first frequency-selective amplification module 201 may be configured to receive a flow rate measurement data signal and perform frequency-selective amplification processing.

[0137] In some embodiments, the first frequency-selective amplification module 201 can amplify signals within a desired frequency band and suppress signals outside the frequency band, thereby improving the signal-to-noise ratio of useful signals and amplifying the signal waveform for subsequent signal processing.

[0138] In some embodiments, as Figure 12 As shown, the first frequency selection amplification module 201 may include resistor R195, resistor R187, resistor R182, resistor R186, resistor R179, resistor R193, resistor R177, resistor R191, resistor R180, resistor R192, resistor R181, resistor R188, resistor R178, resistor R189, capacitor C179, capacitor C182, capacitor C185, capacitor C174, capacitor C177, capacitor C169, capacitor C183, capacitor C170, capacitor C184, capacitor C171, capacitor C180, capacitor C168, capacitor C181, feedback element FB23 and chip U99.

[0139] In some embodiments, pin 1 of chip U99 can be connected to one end of capacitor C169, one end of resistor R179 and one end of capacitor C170; pin 2 of chip U99 can be connected to the other end of capacitor C169, the other end of resistor R179 and one end of resistor R182; pin 3 of chip U99 can be connected to the power supply voltage; pin 4 of chip U99 can be connected to one end of feedback element FB23, one end of resistor R187, one end of capacitor C182 and one end of capacitor C179, wherein the other end of feedback element FB23 is connected to the power supply voltage, and the other end of capacitor C179 and the other end of capacitor C182 are both grounded; pin 5 of chip U99 can be connected to the power supply voltage; pin 6 of chip U99 can be connected to one end of resistor R186, one end of capacitor C183 and one end of resistor R193; pin 7 of chip U99 can be connected to the other end of capacitor C183 end, the other end of resistor R193 and one end of capacitor C184 are all connected; pin 8 of chip U99 can be connected to one end of resistor R188, one end of capacitor C180 and one end of resistor R192; pin 9 of chip U99 can be connected to the other end of capacitor C180, the other end of resistor R192 and one end of resistor R191, wherein the other end of resistor R191 can be connected to the other end of capacitor C184; pin 10 and pin 12 of chip U99 can both be connected to the power supply voltage; pin 11 of chip U99 is grounded; pin 13 of chip U99 can be connected to one end of resistor R177, one end of resistor R180 and one end of capacitor C171, wherein the other end of resistor R177 can be connected to the other end of capacitor C170; pin 14 of chip U99 can be connected to the other end of resistor R180, the other end of capacitor C171 and one end of resistor R181.

[0140] In some embodiments, one end of capacitor C174 can be connected to port 24_IFQ, where port 24_IFQ can be used to receive analog measurement data returned by radar flow velocity module 200, and the other end of capacitor C174 can be connected to the other end of resistor R182. One end of capacitor C177 can be connected to port 24_IFI, where port 24_IFI is used to receive analog measurement data returned by radar flow velocity module 200, and the other end of capacitor C177 can be connected to the other end of resistor R186. The signals received by ports 24_IFQ and 24_IFI can be a set of differential signals.

[0141] In some embodiments, one end of capacitor C168 may be connected to the other end of resistor R181 and one end of resistor R178, wherein the other end of resistor R178 may be connected to port 24_IFQ1, which may be used to connect to PGA module 202. One end of capacitor C181 may be connected to the other end of resistor R188 and one end of resistor R189, wherein the other end of resistor R189 may be connected to port 24_IFI1, which may be used to connect to PGA module 202.

[0142] In some embodiments, resistor R187 may be 100K ohms, resistor R195 may be 100K ohms, resistor R182 may be 2K ohms, resistor R186 may be 2K ohms, resistor R179 may be 10K ohms, resistor R193 may be 10K ohms, resistor R177 may be 2K ohms, resistor R191 may be 2K ohms, resistor R192 may be 2K ohms, resistor R180 may be 2K ohms, resistor R181 may be 100 ohms, and resistor R188 may be 100 ohms. Capacitor C168 may be 0.47 microfarads, capacitor C181 may be 0.47 microfarads, capacitor C171 may be 680 picofarads, capacitor C180 may be 680 picofarads, capacitor C170 may be 10 microfarads, capacitor C184 may be 10 microfarads, capacitor C169 may be 560 picofarads, capacitor C183 may be 560 picofarads, capacitor C174 may be 10 microfarads, capacitor C177 may be 0.1 microfarads, capacitor C185 may be 0.1 microfarads, capacitor C182 may be 0.1 microfarads, and capacitor C179 may be 10 microfarads.

[0143] In some embodiments, the model of chip U20 may be MS8094T.

[0144] In some embodiments, the PGA module 202 may be configured to perform adjustable amplification processing on the radar speed measurement signal after frequency selection amplification, and then send the radar speed measurement signal after adjustable amplification processing to the main control module 1 .

[0145] In some embodiments, the PGA module 202 may be an amplifier module with software adjustable gain, which may dynamically adjust the amplification factor of the PGA according to the signal amplitude and signal strength collected by the back-end ADC to ensure signal stability.

[0146] In some embodiments, as Figure 13 As shown, the PGA module 202 may include resistor R190, resistor R194, resistor R183, resistor R184, resistor R185, resistor R199, resistor R200, resistor R196, resistor R197, resistor R198, capacitor C178, capacitor C172, capacitor C173, capacitor C175, capacitor C176, capacitor C186, capacitor C192, capacitor C193, capacitor C187, capacitor C188, capacitor C190, capacitor C191, chip U97 and chip U98.

[0147] In some embodiments, pin 1 of chip U97 can be connected to one end of capacitor C172, one end of capacitor C175 and the power supply voltage, wherein the other end of capacitor C172 can be connected to the other end of capacitor C175, one end of capacitor C173, and one end of capacitor C176 and grounded; pin 3 of chip U97 can be connected to one end of capacitor C178, wherein the other end of capacitor C178 can be connected to port 24_IFQ1; pin 4 of chip U97 can be connected to one end of resistor R190, wherein the other end of resistor R190 is grounded; pin 5 of chip U97 can be connected to one end of resistor R194; Pin 6 is grounded; pin 7 of chip U97 can be connected to one end of resistor R185 and port SP12_SCK of main control module 1, wherein the other end of resistor R185 can be connected to one end of resistor R183, one end of resistor R184 and power supply voltage; pin 8 of chip U97 can be connected to the other end of resistor R184 and port SP12_DIO of main control module 1; pin 9 of chip U97 can be connected to the other end of resistor R183 and port SP12_CS1 of main control module 1; pin 10 of chip U97 can be connected to the other end of capacitor C173, the other end of capacitor C176 and power supply voltage.

[0148] In some embodiments, pin 1 of chip U98 can be connected to one end of capacitor C187, one end of capacitor C190, and the power supply voltage, wherein the other end of capacitor C187 can be connected to the other end of capacitor C188, one end of capacitor C190, and one end of capacitor C191 and grounded; pin 3 of chip U22 can be connected to one end of capacitor C192, wherein the other end of capacitor C192 can be connected to port 24_IFI1; pin 4 of chip U98 can be connected to one end of resistor R199, wherein the other end of resistor R199 is grounded; pin 5 of chip U98 can be connected to one end of resistor R200; Pin 6 is grounded; pin 7 of chip U98 can be connected to one end of resistor R198 and port SP12_SCK of main control module 1, wherein the other end of resistor R198 can be connected to one end of resistor R196, one end of resistor R197 and power supply voltage; pin 8 of chip U98 can be connected to the other end of resistor R197 and port SP12_DIO of main control module 1; pin 9 of chip U98 can be connected to the other end of resistor R196 and port SP12_CS2 of main control module 1; pin 10 of chip U98 can be connected to the other end of capacitor C188, the other end of capacitor C191 and power supply voltage.

[0149] In some embodiments, resistor R194 may be 100 ohms, resistor R183 may be 10K ohms, resistor R184 may be 10K ohms, resistor R185 may be 10K ohms, resistor R200 may be 100 ohms, resistor R196 may be 10K ohms, resistor R197 may be 10K ohms, and resistor R198 may be 10K ohms. Capacitor C178 may be 1 microfarad, capacitor C186 may be 1 nanofarad, capacitor C172 may be 10 microfarad, capacitor C173 may be 10 microfarad, capacitor C175 may be 0.1 microfarad, capacitor C176 may be 0.1 microfarad, capacitor C192 may be 1 microfarad, capacitor C193 may be 1 nanofarad, capacitor C187 may be 10 microfarad, capacitor C188 may be 10 microfarad, capacitor C190 may be 0.1 microfarad, and capacitor C191 may be 0.1 microfarad.

[0150] In some embodiments, the chip U97 and the chip U98 may be of model PGA113.

[0151] In some embodiments, the radar flow velocity module 200 may include a capacitor C189, a feedback element FB24, and a connector J6.

[0152] In some embodiments, as Figure 14As shown, the first end of the connector J6 can be connected to one end of the feedback element FB24 and one end of the capacitor C189, wherein the other end of the feedback element FB24 can be connected to the power supply voltage; the second end of the connector J6 can be connected to the other end of the capacitor C189 and grounded; the third end of the connector J6 can be connected to the port 24_IFI for outputting the flow rate measurement data signal; the fourth end of the connector J6 can be connected to the port 24_IFQ for outputting the flow rate measurement data signal; the seventh end and the eighth end of the connector J6 are both grounded.

[0153] In some embodiments, the radar water level module 30 may include a radar water level module 300 for transmitting and receiving radar ranging signals, a differential amplifier module 301 , a second frequency selective amplifier module 302 and an emitter follower module 303 .

[0154] In some embodiments, one end of the differential amplifier module 301 can be connected to the radar water level module 300, and the other end of the differential amplifier module 301 can be connected to one end of the second frequency-selective amplifier module 302. One end of the emitter follower module 303 can be connected to the other end of the second frequency-selective amplifier module 302, and the other end of the emitter follower module 303 can be connected to the main control module 1.

[0155] In some embodiments, the differential amplifier module 301 can be configured to convert the distance measurement data signal corresponding to the radar ranging signal into a single-ended signal and amplify it. Compared with other amplifier circuits, the differential amplifier circuit has higher amplification accuracy and better anti-interference performance.

[0156] In some embodiments, as Figure 15 As shown, the differential amplifier module 301 may include a resistor R39, a resistor R36, a resistor R40, a resistor R37, a capacitor C60, a capacitor C61, a capacitor C57, a capacitor C62 and a chip U7.

[0157] In some embodiments, pin 1 of chip U7 can be connected to one end of resistor R36 and one end of capacitor C60, wherein the other end of resistor R36 can be connected to a reference voltage, and the other end of capacitor C60 can be connected to port IF_IN, which can be used to receive a distance measurement data signal; pin 2 of chip U7 can be connected to one end of resistor R39, and pin 3 of chip U7 can be connected to the other end of resistor R39; pin 4 of chip U7 can be connected to one end of capacitor C61 and one end of resistor R40, wherein the capacitor C61 The other end can be connected to port IF_IP, which can be used to receive distance measurement data signals; pin 5 of chip U7 can be grounded; pin 6 of chip U7 can be connected to the other end of resistor R40 and the reference voltage; pin 7 of chip U7 can be connected to one end of resistor R37, wherein the other end of resistor R37 can be connected to one end of capacitor C62 and the second frequency selection amplifier module 302, and the other end of capacitor C62 is grounded; pin 8 of chip U7 can be connected to one end of capacitor C57 and the power supply voltage, and the other end of capacitor C57 is grounded.

[0158] In some embodiments, resistor R36 may be 3K ohms, resistor R39 may be 1K ohms, and resistor R40 may be 3K ohms. Capacitor C62 may be 1 pF, capacitor C57 may be 0.1 μF, capacitor C60 may be 10 nanofarads, and capacitor C61 may be 10 nanofarads.

[0159] In some embodiments, the chip U7 may be INA827 / AD8236.

[0160] In some embodiments, the second frequency-selective amplification module 302 is configured to perform frequency-selective filtering and amplification on a single-ended signal. In some embodiments, the second frequency-selective amplification module 302 can amplify signals within a desired frequency band and suppress signals outside of the frequency band. This improves the signal-to-noise ratio of the desired signal while amplifying the signal waveform to facilitate subsequent signal processing.

[0161] In some embodiments, as Figure 15 As shown, the second frequency selective amplifying module 302 may include a resistor R41, a resistor R38, a resistor R35, a resistor R34, a capacitor C63, a capacitor C58, a capacitor C59, a capacitor C55, a capacitor C56 and a chip U8.

[0162] In some embodiments, pin 1 of chip U8 can be connected to one end of resistor R35, one end of capacitor C55, and one end of resistor R34; pin 2 of chip U8 is grounded; pin 3 of chip U8 can be connected to a reference voltage; pin 4 of chip U8 can be connected to one end of resistor R35, the other end of capacitor C55, and one end of resistor R41; pin 5 of chip U8 can be connected to one end of resistor R38; pin 6 of chip U8 can be connected to the other end of resistor R38, one end of capacitor C58, one end of capacitor C59, and the power supply voltage, wherein the other end of capacitor C58 and the other end of capacitor C59 are both grounded.

[0163] In some embodiments, one end of capacitor C63 can be connected to the other end of resistor R37 and one end of capacitor C62, and the other end of capacitor C63 can be connected to the other end of resistor R41. One end of capacitor C56 can be connected to the other end of resistor R34 and port 120_IF_I, and the other end of capacitor C56 is grounded. Port 120_IF_I can be configured to transmit a signal after frequency selection, filtering, and amplification by second frequency-selective amplification module 302, and port 120_IF_I can be connected to emitter-follower module 303.

[0164] In some embodiments, resistor R38 may be 3K ohms, resistor R35 may be 44.2K ohms, resistor R34 may be 100R ohms, and resistor R41 may be 1K ohm. Capacitor C63 may be 10 nanofarads, capacitor C55 may be 1.3 picofarads, capacitor C56 may be 560 picofarads, capacitor C58 may be 10 microfarads, and capacitor C59 may be 0.1 microfarads.

[0165] In some embodiments, the reference voltage may be provided by a reference voltage circuit.

[0166] In some embodiments, as Figure 16 As shown, the reference voltage circuit may include a resistor R31 , a resistor R33 , a resistor R30 , a resistor R32 , a capacitor C51 , a capacitor C50 , a capacitor C53 , a capacitor C54 , a capacitor C52 and a chip U6 .

[0167] In some embodiments, pin 1 of chip U6 can be connected to one end of resistor R32; pin 2 of chip U6 is grounded; pin 3 of chip U6 can be connected to one end of resistor R31, one end of resistor R33, one end of capacitor C53 and one end of capacitor C54, wherein the other end of resistor R33, the other end of capacitor C53 and the other end of capacitor C54 are all grounded; pin 4 of chip U6 can be connected to one end of resistor R32; pin 5 of chip U6 can be connected to one end of resistor R30, wherein the other end of resistor R30 can be connected to the other end of resistor R31, one end of capacitor C50, one end of capacitor C51 and the power supply voltage, and the other end of capacitor C50 can be connected to the other end of capacitor C51, the other end of resistor R33, the other end of capacitor C53 and the other end of capacitor C54 and grounded; pin 6 of chip U6 can be connected to the other end of resistor R30.

[0168] In some embodiments, one end of the capacitor C52 may be connected to the other end of the resistor R32 and the port OPA_Vref, and the other end of the capacitor C52 is grounded, where the port OPA_Vref may be used to provide a reference voltage.

[0169] In some embodiments, resistor R33 may be 10K ohms, resistor R31 may be 10K ohms, resistor R30 may be 3K ohms, and resistor R32 may be 1K ohms. Capacitor C51 may be 10 microfarads, capacitor C50 may be 0.1 microfarads, capacitor C53 may be 10 microfarads, capacitor C54 may be 0.1 microfarads, and capacitor C52 may be 0.1 microfarads.

[0170] In some embodiments, the radar water level module 30 may include a conversion module for providing a distance measurement data signal, and the conversion module may be connected to the differential amplification module 301 .

[0171] In some embodiments, as Figure 17 As shown, the conversion module may include a connector J5, a resistor R258, a resistor R259, a capacitor C235, a capacitor C236, a capacitor C237 and a capacitor C238.

[0172] In some embodiments, pins 1 and 2 of connector J5 can be connected to the power supply voltage; pins 3, 4, 10, 12, 15, 16, 18, 20, 21 and 22 of connector J5 are all grounded; pin 6 of connector J5 can be connected to port 4158_LE of radar water level module 30, pin 7 of connector J5 can be connected to port 4158_MUXOUT of radar water level module 30, pin 8 of connector J5 can be connected to port 4158_ENABLE of radar water level module 30, and pin 10 of connector J5 can be connected to port 4158_ENABLE of radar water level module 30. 11 can be connected to port 4158_CLK of the radar water level module 30, pin 13 of connector J5 can be connected to port 4158_TXDATA of the radar water level module 30, and pin 14 of connector J5 can be connected to port 4158_DATA of the radar water level module 30; pin 17 of connector J5 can be connected to one end of resistor R258 and one end of capacitor C237, where the other end of capacitor C237 is grounded; pin 19 of connector J5 can be connected to one end of resistor R259 and one end of capacitor C238, where the other end of capacitor C238 is grounded.

[0173] In some embodiments, one end of capacitor C235 may be connected to port IF_IN and the other end of resistor R258, and the other end of capacitor C235 may be grounded. One end of capacitor C236 may be connected to port IF_IP and the other end of resistor R259, and the other end of capacitor C236 may be grounded.

[0174] In some embodiments, the capacitance of capacitors C235, C236, C237, and C238 can all be 560 pF.

[0175] In some embodiments, the emitter follower module 303 can be configured to increase input impedance and send the signal amplified by the frequency selection filtering of the second frequency selection amplification module 302 to the main control module 1 .

[0176] The embodiment is only a special example and does not indicate that the present invention is implemented in such a way.

[0177] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A radar ultrasonic integrated machine applied to pit pipes, characterized in that: The radar and ultrasonic integrated machine includes a radar flow velocity module, a radar water level module, an ultrasonic velocity measurement module, a pressure sensor and a main control module; the main control module is connected to the radar flow velocity module, the radar water level module, the ultrasonic velocity measurement module and the pressure sensor; The pressure sensor is used to measure the pressure value and send the pressure value to the main control module; The main control module is used to receive the pressure value and, based on the pressure value, control the radar flow velocity module to measure the pipeline flow velocity of the cellar pipeline, and control the radar water level module to measure the water level height of the cellar pipeline, or measure the water level height, and control the ultrasonic velocity measurement module to measure the pipeline flow velocity.

2. The radar ultrasonic integrated machine for cellar pipes according to claim 1 is characterized in that: The ultrasonic velocity measurement module includes an ultrasonic transmitter; the ultrasonic transmitter includes a driving circuit module, a transformer and boost module for providing AC voltage, an impedance matching module and an ultrasonic transmitter probe; One end of the driving circuit module is connected to the main control module, and the other end of the driving circuit module is connected to one end of the transformer and boost module; one end of the impedance matching module is connected to the other end of the transformer and boost module, and the other end of the impedance matching module is connected to the ultrasonic transmitting probe.

3. The radar ultrasonic integrated machine for cellar pipes according to claim 2 is characterized in that: The driving circuit module is configured to receive a PWM signal from the main control module and control the switching action of the voltage conversion and boost module based on the PWM signal; The impedance matching module is used for LC impedance matching of the transformer and boost module, and converts the transmission waveform of the transformer and boost module into a sine wave signal; the ultrasonic transmitting probe receives the sine wave signal and converts the sine wave signal into an ultrasonic transmission signal.

4. The radar ultrasonic integrated machine for use in pit pipes according to claim 1, characterized in that: The ultrasonic velocity measurement module includes an ultrasonic receiving unit; the ultrasonic receiving unit includes an ultrasonic receiving probe for receiving ultrasonic reflection signals, a bandpass filter module, an amplification module, a mixing circuit module, a low-pass filter module and a clock chip module for generating a local oscillation signal; One end of the band-pass filter module is connected to the ultrasonic receiving probe, and the other end of the band-pass filter module is connected to the amplification module; The mixing circuit module is connected to the amplification module, and the clock chip module and the low-pass filter module are both connected; The low-pass filter module is connected to the main control module.

5. The radar ultrasonic integrated machine applied to pit pipes according to claim 4 is characterized in that: The bandpass filtering module is configured to filter the ultrasonic reflection signal to obtain a filtered signal, and send the filtered signal to the amplifying module; the amplifying module is configured to amplify the filtered signal to obtain an amplified signal, and send the amplified signal to the mixing circuit module; The mixing circuit module is configured to receive the local oscillator signal of the clock chip module, and mix the amplified signal received from the amplification module into a mixed signal based on the local oscillator signal; the low-pass filtering module receives the mixed signal, filters the mixed signal, and sends the filtered mixed signal to the main control module.

6. The radar ultrasonic integrated machine for cellar pipes according to claim 1, characterized in that: The radar flow rate module includes a radar flow rate module for transmitting and receiving radar speed measurement signals, a first frequency selection amplification module and a PGA module; one end of the first frequency selection amplification module is connected to the radar flow rate module, and the other end of the first frequency selection amplification module is connected to the PGA module; the PGA module is connected to the main control module.

7. The radar ultrasonic integrated machine for use in pit pipes according to claim 6, characterized in that: The radar flow velocity module is configured to obtain a flow velocity measurement data signal based on the radar velocity measurement signal; The first frequency selective amplification module is configured to receive the flow rate measurement data signal and perform frequency selective amplification processing; the PGA module is configured to perform adjustable amplification processing on the flow rate measurement data signal after frequency selective amplification, and send the flow rate measurement data signal after adjustable amplification processing to the main control module.

8. The radar ultrasonic integrated machine for use in pit pipes according to claim 1, characterized in that: The radar water level module includes a radar water level module for transmitting and receiving radar ranging signals, a differential amplifier module, a second frequency selective amplifier module and an emitter follower module; One end of the differential amplifier module is connected to the radar water level module, and the other end of the differential amplifier module is connected to one end of the second frequency selective amplifier module; one end of the emitter follower module is connected to the other end of the second frequency selective amplifier module, and the other end of the emitter follower module is connected to the main control module.

9. The radar ultrasonic integrated machine applied to pit pipes according to claim 8, characterized in that: The differential amplification module is configured to convert the distance measurement data signal corresponding to the radar ranging signal into a single-ended signal and amplify the signal; The second frequency-selective amplification module is configured to perform frequency-selective filtering and amplification on the single-ended signal; the emitter follower module is configured to increase the input impedance and send the radar speed measurement signal processed by the second frequency-selective amplification module to the main control module.

10. The radar ultrasonic integrated machine applied to pit pipes according to claim 1, characterized in that: When the radar flow rate module and the radar water level module are turned on, the main control module simultaneously turns off the ultrasonic velocity measurement module; when the ultrasonic velocity measurement module is turned on, the main control module simultaneously turns off the radar flow rate module and the radar water level module.

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