Transmit-receive system of transducer of gas ultrasonic flowmeter

Abstract

The utility model provides a transmitting and receiving system of a transducer of a gas ultrasonic flowmeter, which comprises the transducer used for transmitting and receiving ultrasonic waves; the inductance suppression module is electrically connected with the transducer to form a resonance circuit; and the control module is coupled with the transducer and the inductance suppression module, and is used for switching on the transducer and controlling the on-off of the electric connection between the transducer and the inductance suppression module. According to the ultrasonic flowmeter, by arranging the inductance suppression module, when the resonant frequency of the inductor is consistent with the oscillation frequency of the transducer, namely the resonant circuit is formed, aftershock after absorption or emission can be effectively absorbed, so that the aftershock of the transducer is suppressed, and the detection result of the ultrasonic flowmeter is more accurate.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic flowmeters, in particular to a transceiver system of a gas ultrasonic flowmeter transducer. Background Art

[0002] Ultrasonic flowmeter is a device that uses ultrasonic waves to measure the flow rate of fluid in pipes or conduits. It is widely used in industrial production, commercial measurement, water conservancy detection and other fields. According to the detection principle of ultrasonic waves, ultrasonic flowmeters can be divided into many types, including propagation velocity difference method, beam deviation method, Doppler method, cross-correlation method, spatial filter method and noise method.

[0003] The propagation velocity difference method is a measurement principle in ultrasonic flow meters. It mainly uses the difference in the speed of ultrasonic waves when they propagate downstream and upstream in the fluid to measure the flow velocity and flow rate of the fluid. Transducers are key components in ultrasonic flow meters, which are responsible for transmitting and receiving ultrasonic waves.

[0004] In existing ultrasonic flow meters, residual vibrations generated by capacitor crystals may cause the transducer to send ultrasonic waves multiple times, thereby causing signal interference to the receiving transducer and affecting the detection accuracy of the ultrasonic flow meter. Utility Model Content

[0005] The present application provides a transceiver system for a gas ultrasonic flow meter transducer, which can reduce the interference of residual vibration of the ultrasonic flow meter and improve the detection accuracy of the ultrasonic flow meter.

[0006] A first aspect of the present application provides a transceiver system for a gas ultrasonic flow meter transducer.

[0007] A transceiver system for a gas ultrasonic flowmeter transducer, comprising:

[0008] A transducer for transmitting and receiving ultrasonic waves;

[0009] An inductance suppression module, used for being electrically connected to the transducer to form a resonant circuit;

[0010] The control module is coupled to the transducer and the inductance suppression module, and is used to switch on the transducer and control the on and off of the electrical connection between the transducer and the inductance suppression module.

[0011] Preferably, the control module includes:

[0012] A circuit switching unit, coupled to the inductance suppression module and the transducer and having an activation terminal;

[0013] The processing unit is used to electrically connect the transducer to the activation end before the ultrasonic wave of the transducer is emitted; and to electrically connect the transducer to the inductance suppression module after the ultrasonic wave is emitted.

[0014] Preferably, the processing unit adopts MCU.

[0015] Preferably, the circuit switching unit adopts an ADG5409 chip.

[0016] Preferably, it also includes:

[0017] The signal amplifying unit is coupled to the circuit switching unit and is used for amplifying the ultrasonic signal received by the transducer so as to be received by the processing unit.

[0018] Preferably, the signal amplification unit includes an operational amplifier IC1A, a resistor R4, a resistor R3, a capacitor C2 and a capacitor C3, one end of the resistor R4 is coupled to the circuit switching unit, and the other end is coupled to the inverting input terminal of the operational amplifier IC1A, the electrical connection point between the resistor R4 and the inverting input terminal of the operational amplifier IC1A is coupled to the resistor R3, the other end of the resistor R3 is coupled to the output terminal of the operational amplifier IC1A, the capacitor C2 is connected in parallel with the resistor R3, one end of the capacitor C3 is coupled to the inverting input terminal of the operational amplifier IC1A, and the other end is coupled to the non-inverting input terminal of the operational amplifier IC1A, and the non-inverting input terminal of the non-inverting input terminal of the operational amplifier IC1A is coupled to the circuit switching unit.

[0019] Preferably, the operational amplifier IC1A adopts AD8036.

[0020] Preferably, the transducer, the inductance suppression module and the control module are each provided with two groups.

[0021] Preferably, the inductance suppression module includes an inductor L3 and an inductor L4, one end of the inductor L3 is grounded, and the other end is used to couple with a pin of the transducer through the control module, and one end of the inductor L4 is grounded, and the other end is used to couple with another pin of the transducer through the control module.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] The present application sets an inductance suppression module to make the resonant frequency of the inductor consistent with the oscillation frequency of the transducer, that is, to form a resonant circuit, which can effectively absorb or suppress the residual vibration after transmission, thereby suppressing the residual vibration of the transducer and making the detection result of the ultrasonic flow meter more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial schematic diagram of a transceiver system of a gas ultrasonic flow meter transducer according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a processing unit of an embodiment of the present application;

[0026] Figure 3Schematic diagram of a signal amplification unit according to an embodiment of the present application.

[0027] Explanation of the reference numerals: 1. transducer; 2. inductance suppression module; 3. control module; 31. circuit switching unit; 32. processing unit; 4. signal amplification unit. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0029] In the description of the embodiments of the present application, words such as "illustrative", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "illustrative", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "illustrative", "for example" or "for example" is intended to present related concepts in a concrete way.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a kind of association relationship describing the associated objects, indicating that there may be three kinds of relationships, for example, A and / or B, which can represent: A exists alone, B exists alone, and A and B exist at the same time. In addition, unless otherwise specified, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0031] The present application provides a transceiver system for a gas ultrasonic flow meter transducer;

[0032] Reference Figure 1 , Figure 2 and Figure 3A transceiver system of a gas ultrasonic flowmeter transducer includes a transducer 1, an inductance suppression module 2, a control module 3 and a signal amplifying unit 4; the control module 3 includes a circuit switching unit 31 and a processing unit 32; the transducer 1, the inductance suppression module 2 and the control module 3 are each provided with two groups; wherein the two groups of control modules 3 share one processing unit 32; the transducer 1, the inductance suppression module 2 and the signal amplifying unit 4 are all coupled to the circuit switching unit 31, and the circuit switching unit 31 is coupled to the processing unit 32 so as to be controlled by the processing unit 32 to switch the circuit coupled to the transducer 1.

[0033] Reference Figure 1 Specifically, the transducer 1 is an ultrasonic transducer 1 having the function of transmitting and receiving ultrasonic waves. The two transducers 1 are transducer 1-1 and transducer 1-2 respectively. The circuit switching unit 31 adopts the ADG5409 chip. The two circuit switching units 31 are respectively an analog switch U1 and an analog switch U2. The grounding terminals of the transducer 1-1 and the transducer 1-2 are both grounded. The other two pins of the transducer 1-1 are respectively connected to the DA and DB pins of the analog switch U1, and the other two pins of the transducer 1-2 are respectively connected to the DA and DB pins of the analog switch U2; the S1A pins of the analog switch U1 and the analog switch U2 are connected to the excitation signal, and the S1B pins of the analog switch U1 and the analog switch U2 are grounded. The activation end is composed of the excitation signal input pin and the grounding pin of the circuit switching unit 31.

[0034] The VDD terminals of the analog switch U1 and the analog switch U2 are both connected to a +15V voltage, the VSS terminals of the analog switch U1 and the analog switch U2 are both connected to a -15V voltage, and the GND terminals of the analog switch U1 and the analog switch U2 are both grounded;

[0035] Reference Figure 1 and Figure 2 , the processing unit 32 adopts an MCU, the A1 pin of the analog switch U1 is coupled to the A1 pin of the MCU, the A0 pin of the analog switch U1 is coupled to the A0 pin of the MCU, the A1 pin of the analog switch U2 is coupled to the A3 pin of the MCU, and the A0 pin of the analog switch U2 is coupled to the A2 pin of the MCU;

[0036] A set of inductance suppression modules 2 includes an inductor L3 and an inductor L4, one end of the inductor L3 is grounded, and the other end is connected to the S2A pin of the analog switch U1 for coupling with a pin of the transducer 1 through the control module 3, and one end of the inductor L4 is grounded, and the other end is connected to the S2B pin of the analog switch U1 for coupling with another pin of the transducer 1 through the control module 3;

[0037] Another group of inductance suppression modules 2 includes an inductor L1 and an inductor L2. One end of the inductor L1 is grounded, and the other end is connected to the S2A pin of the analog switch U2 for coupling with a pin of the transducer 1 through the control module 3. One end of the inductor L2 is grounded, and the other end is connected to the S2B pin of the analog switch U2 for coupling with another pin of the transducer 1 through the control module 3.

[0038] Inductance suppression module 2, since transducer 1 emits ultrasonic waves by internal capacitor crystal oscillator, after the inductor is connected in series, when the resonant frequency of the inductor is consistent with the oscillation frequency of transducer 1, the residual vibration of transducer 1 can be effectively suppressed;

[0039] Reference Figure 1 and Figure 3 The signal amplifying unit 4 is coupled to the circuit switching unit 31 and is used to amplify the ultrasonic signal received by the transducer 1 for receiving by the processing unit 32; specifically, the signal amplifying unit 4 is a signal amplifying circuit, and the signal amplifying unit 4 is coupled to a set of analog switches U1 and U2;

[0040] A signal amplification unit 4 includes an operational amplifier IC1A, a resistor R4, a resistor R3, a capacitor C2, and a capacitor C3. One end of the resistor R4 is coupled to the S3A pin of the analog switch U2, and the other end is coupled to the inverting input terminal of the operational amplifier IC1A. The electrical connection point between the resistor R4 and the inverting input terminal of the operational amplifier IC1A is coupled to the resistor R3. The other end of the resistor R3 is coupled to the output terminal of the operational amplifier IC1A. The capacitor C2 is connected in parallel with the resistor R3. One end of the capacitor C3 is coupled to the inverting input terminal of the operational amplifier IC1A, and the other end is coupled to the non-inverting input terminal of the operational amplifier IC1A. The non-inverting input terminal of the inverting input terminal of the operational amplifier IC1A is coupled to the S3B pin of the analog switch U2, and the non-inverting input terminal of the inverting input terminal of the operational amplifier IC1A is grounded. The operational amplifier IC1A uses AD8036.

[0041] A signal amplification unit 4 includes an operational amplifier IC2A, a resistor R6, a resistor R5, a capacitor C42 and a capacitor C5, one end of the resistor R6 is coupled to the S3A pin of the analog switch U1, and the other end is coupled to the inverting input terminal of the operational amplifier IC2A, the electrical connection point between the resistor R6 and the inverting input terminal of the operational amplifier IC2A is coupled to the resistor R5, the other end of the resistor R5 is coupled to the output terminal of the operational amplifier IC2A, the capacitor C4 is connected in parallel with the resistor R5, one end of the capacitor C5 is coupled to the inverting input terminal of the operational amplifier IC2A, and the other end is coupled to the non-inverting input terminal of the operational amplifier IC2A, and the non-inverting input terminal of the inverting input terminal of the operational amplifier IC2A is coupled to the S3B pin of the analog switch U1. The operational amplifier IC2A also uses AD8036.

[0042] In other embodiments, the output end of the operational amplifier IC2A and the output end of the operational amplifier IC1A may be coupled to the MCU to provide the MCU with an amplified signal after the transducer 1 receives the ultrasonic wave.

[0043] The implementation principle of the transceiver system of a gas ultrasonic flowmeter transducer provided in this embodiment is as follows: transducer 1 is used as a transmitting transducer 1, and transducer 1 is used as a receiving transducer 1. At this time, the MCU controls the A0 and A1 pins of the analog switch U1 to be set to 0, the DA of the analog switch U1 is connected to the S1A of the analog switch U1, the DB of the analog switch U1 is connected to the S1B of the analog switch U1, and the S1A of the analog switch U1 is connected to the S1B of the analog switch U1, so that the transducer 1 emits an ultrasonic wave;

[0044] A2 of analog switch U2 is set to 0, and A3 of analog switch U2 is set to 1. At this time, DA of analog switch U2 is turned on with S3A of analog switch U2, DB of analog switch U2 is turned on with S3B of analog switch U2, and S3A of analog switch U2 and S3B of analog switch U2 are connected to the signal amplification circuit, so that transducer 12 receives the ultrasonic wave emitted by transducer 11 to generate an ultrasonic wave signal and amplifies the ultrasonic wave signal;

[0045] When the ultrasonic emission of transducer 1 is completed, MUC controls analog switch U1 to suppress residual vibration. Among them, the time of ultrasonic emission of transducer 1 is fixed, and personnel can start residual vibration suppression at a time interval set by MUC, such as starting residual vibration suppression after transducer 1 starts the set time; when the residual vibration is suppressed, A0 of analog switch U1 is set to 1, A1 of analog switch U1 is set to 0, DA of analog switch U1 is connected to S2A of U1, DB of analog switch U1 is connected to S2B of U1, and in this state, L3 and L4 absorb and suppress the residual vibration after the emission of transducer 1, so that the residual vibration current will not cause transducer 1 to send ultrasonic waves again. When transducer 1 is used as transmitting transducer 1 and transducer 1 is used as receiving transducer 1, the working principle is similar to the above principle. Afterwards, MUC collects the time from the ultrasonic emission of transducer 1 to the reception of transducer 1 and the time from the ultrasonic emission of transducer 1 to the reception of transducer 1, and the time from the ultrasonic emission of transducer 1 to the reception of transducer 1, and calculates the flow velocity in the flow meter channel by the time difference method.

[0046] The "unit" and "module" in this specification refer to software and / or hardware that can independently complete a specific function or cooperate with other components to complete a specific function, where the hardware may be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.

[0047] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0048] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are only regarded as exemplary, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A transceiver system for a gas ultrasonic flowmeter transducer, characterized in that: include: A transducer (1) for transmitting and receiving ultrasonic waves; An inductance suppression module (2) is used to be electrically connected to the transducer (1) to form a resonant circuit; The control module (3) is coupled to the transducer (1) and the inductance suppression module (2), and is used to switch on the transducer (1) and control the on and off of the electrical connection between the transducer (1) and the inductance suppression module (2).

2. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 1, characterized in that: The control module (3) comprises: A circuit switching unit (31) coupled to the inductance suppression module (2) and the transducer (1) and having an activation end; The processing unit (32) is used to electrically connect the transducer (1) to the activation end before the ultrasonic wave of the transducer (1) is emitted; and to electrically connect the transducer (1) to the inductance suppression module (2) after the ultrasonic wave is emitted.

3. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 2, characterized in that: The processing unit (32) is an MCU.

4. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 2, characterized in that: The circuit switching unit (31) adopts an ADG5409 chip.

5. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 2, characterized in that: Also includes: The signal amplifying unit (4) is coupled to the circuit switching unit (31) and is used to amplify the ultrasonic signal received by the transducer (1) for reception by the processing unit (32).

6. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 5, characterized in that: The signal amplification unit (4) includes an operational amplifier IC1A, a resistor R4, a resistor R3, a capacitor C2 and a capacitor C3, one end of the resistor R4 is coupled to the circuit switching unit (31), and the other end is coupled to the inverting input terminal of the operational amplifier IC1A, the electrical connection point between the resistor R4 and the inverting input terminal of the operational amplifier IC1A is coupled to the resistor R3, the other end of the resistor R3 is coupled to the output terminal of the operational amplifier IC1A, the capacitor C2 is connected in parallel with the resistor R3, one end of the capacitor C3 is coupled to the inverting input terminal of the operational amplifier IC1A, and the other end is coupled to the non-inverting input terminal of the operational amplifier IC1A, and the non-inverting input terminal of the non-inverting input terminal of the operational amplifier IC1A is coupled to the circuit switching unit (31).

7. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 6, characterized in that: The operational amplifier IC1A adopts AD8036.

8. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 1, characterized in that: The transducer (1), the inductance suppression module (2) and the control module (3) are each provided in two groups.

9. The transceiver system of a gas ultrasonic flowmeter transducer according to claim 1, characterized in that: The inductance suppression module (2) comprises an inductor L3 and an inductor L4, one end of the inductor L3 is grounded, and the other end is used to couple with a pin of the transducer (1) through the control module (3), and one end of the inductor L4 is grounded, and the other end is used to couple with another pin of the transducer (1) through the control module (3).

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