CN116961629A - Ultrasonic amplification control circuit and ultrasonic instrument using same - Google Patents

Abstract

The application discloses an ultrasonic amplification control circuit and an ultrasonic instrument using the same, wherein the ultrasonic amplification control circuit comprises a microprocessor, an ultrasonic signal transmitting and receiving measurement IC and an amplification control module; the microprocessor outputs a first control signal to the ultrasonic signal transmitting and receiving measurement IC and also outputs a second control signal to the amplification control module; the ultrasonic signal sending and receiving measurement IC generates a square wave signal according to the first control signal and outputs the square wave signal to the amplification control module; the amplification control module enters a working mode according to the second control signal and the square wave signal, amplifies the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, and the excitation pulse voltage signal is used for increasing the amplitudes of the ultrasonic wave signal and the ultrasonic wave echo signal. The ultrasonic amplification control circuit and the ultrasonic instrument using the same increase the amplitude of ultrasonic signals and ultrasonic echo signals, distinguish the ultrasonic echo signals from noise signals, and simplify the circuit structure.

Description

An ultrasonic amplification control circuit and an ultrasonic instrument using the same

Technical field

The present invention relates to the technical field of ultrasonic instruments, and in particular to an ultrasonic amplification control circuit and an ultrasonic instrument using the same.

Background technique

Ultrasonic instrument is a kind of contact measuring instrument, including ultrasonic heat meter, ultrasonic water meter, ultrasonic gas meter, etc. Ultrasonic instrument adopts advanced multi-pulse technology, signal digital processing technology and error correction technology, and relies on ultrasonic signal to detect in liquid or gas. The time difference between downstream propagation and countercurrent propagation is used to measure the flow rate and flow rate of liquid or gas. At the same time, ultrasonic instruments will not change the flow state of liquid or gas, will not cause pressure loss, and are easy to install. Therefore, ultrasonic instruments rely on Its advantages such as convenient measurement, low cost, and accurate measurement results are widely used in various fields.

However, when using ultrasonic instruments to measure parameters such as the flow rate of gas or liquid in some environments with long pipeline distances, due to the long sound channel distance, the ultrasonic signal emitted by the transducer at the transmitting end of the ultrasonic instrument attenuates quickly during the propagation process. As a result, the amplitude of the ultrasonic echo signal received by the transducer at the receiving end of the ultrasonic instrument is small, which in turn causes the ultrasonic instrument to easily mix the ultrasonic echo signal and the noise signal together when analyzing the measurement results, making it difficult to distinguish them, which will cause The measurement results of the ultrasonic instrument are inaccurate, which reduces the accuracy of the measurement results.

Therefore, in order to better distinguish ultrasonic echo signals from noise signals and improve the accuracy of ultrasonic instrument measurement results of parameters such as flow and flow velocity, the current traditional method is to use a transformer to increase the voltage of the ultrasonic instrument transducer. The amplitude of the emitted ultrasonic signal makes the amplitude of the ultrasonic echo signal larger than the noise signal, thereby distinguishing it. However, using a transformer to boost the voltage requires customizing a large transformer, which will also cause EMC problems and increase the circuit. The complexity of the structure and the number of related components increase production costs.

Contents of the invention

In order to increase the amplitude of the ultrasonic signal and the ultrasonic echo signal, distinguish the ultrasonic echo signal from the noise signal, and simplify the circuit structure, this application provides an ultrasonic amplification control circuit and an ultrasonic instrument using the same.

In the first aspect, this application provides an ultrasonic amplification control circuit, which adopts the following technical solution: including a microprocessor, an ultrasonic signal transmitting and receiving measurement IC, and an amplification control module;

A microprocessor for outputting a first control signal to the ultrasonic signal transmitting and receiving measurement IC, and also for outputting a second control signal to the amplification control module;

Ultrasonic signal sending and receiving measurement IC, used to generate a square wave signal according to the first control signal and output it to the amplification control module;

an amplification control module, configured to enter the working mode according to the second control signal and the square wave signal, and amplify the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal; the excitation pulse voltage signal is used to increase The amplitude of large ultrasonic signal and ultrasonic echo signal.

By adopting the above technical solution, the amplification control module amplifies the voltage signal of the excitation power supply to generate an excitation pulse voltage signal, and increases the amplitude of the ultrasonic signal through the excitation pulse voltage signal, thereby increasing the amplitude of the ultrasonic echo signal, making the ultrasonic wave The echo signal is distinguished from the noise signal, and there is no need to customize large-volume transformers and related components. It has good electromagnetic compatibility, and the control logic and circuit structure are simple, making the circuit more stable and reliable and reducing costs.

In a specific implementation, the amplification control module includes an amplification control chip, and the amplification control chip includes an OE pin, an IN2+ pin, an IN1+ pin, a VCC pin, an OUT1+ pin and an OUT2+ pin, and the VCC The pin is used to connect the excitation power supply, the voltage value of the excitation power supply is V1, and the OUT1+ pin and OUT2+ pin are the output pins of the amplification control chip;

The microprocessor is used to output the second control signal to the OE pin and IN2+ pin of the amplification control chip;

The ultrasonic signal sending and receiving measurement IC is used to output square wave signals to the IN1+ pin of the amplification control chip;

The amplification control chip is configured to enter the working mode according to the second control signal and the square wave signal, and amplify the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal.

By adopting the above technical solution and using the lower voltage signal of the excitation power supply, a higher excitation pulse voltage signal can be generated, which has a better amplification effect on the amplitude of the ultrasonic signal and ultrasonic echo signal.

In a specific implementation, the amplification control chip amplifies the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, which specifically includes:

If the signals output by the microprocessor to the OE pin and the IN2+ pin are both high level, the amplification control chip enters the working mode; after the amplification control chip enters the working mode: If the ultrasonic signal sending and receiving measurement IC outputs to the IN1+ pin The square wave signal is high level, then the voltage value output by the OUT1+ pin is 0, and the voltage value output by the OUT2+ pin is V1; if the ultrasonic signal is sent and received, the measurement IC outputs a square wave to the IN1+ pin When the signal is low level, the voltage value output by the OUT1+ pin is 0, and the voltage value output by the OUT2+ pin is -V1;

The voltage value output by the OUT1+ pin and the voltage value output by the OUT2+ pin constitute an excitation pulse voltage signal.

By adopting the above technical solution, the microprocessor controls the amplification control chip to enter the working mode. The amplification control chip sends and receives the ultrasonic signal to measure the high level and low level of the square wave signal output by the IC, so that the voltage value of the output pin is equal to the excitation The voltage value of the power supply or the opposite number of the voltage value of the excitation power supply, thereby amplifying the voltage signal of the excitation power supply by 2 times to generate the excitation pulse voltage signal.

In a specific implementation, the amplification control module is also configured to enter the sleep mode according to the second control signal.

By adopting the above technical solution, the microprocessor can also control the amplification control module to enter sleep mode when no work is needed, which reduces power consumption, saves electric energy and extends the service life.

In a specific implementation, the amplification control module is further configured to enter the sleep mode according to the second control signal specifically including:

If the signal output by the microprocessor to the OE pin is low level, the amplification control chip enters sleep mode, and the OUT1+ pin and OUT2+ pin of the amplification control chip have no output.

In a second aspect, this application provides an ultrasonic instrument, which adopts the following technical solution: the ultrasonic instrument includes the above-mentioned ultrasonic amplification control circuit, and also includes a transducer and a signal processing module, and the transducer is connected to the amplification control module. , the signal processing module is connected to the ultrasonic signal sending and receiving measurement IC;

A transducer configured to receive the excitation pulse voltage signal output by the amplification control module, emit an ultrasonic signal according to the excitation pulse voltage signal, and receive the ultrasonic echo signal and output it to the signal processing module;

A signal processing module for converting the ultrasonic echo signal into a corresponding sine wave signal and outputting it to the ultrasonic signal transmitting and receiving measurement IC;

The ultrasonic signal transmitting and receiving measuring IC is used to convert the sine wave signal into the corresponding square wave signal, and combine the ultrasonic signal transmitting and receiving measuring IC to send the square wave to the amplification control module according to the time of conversion into the corresponding square wave signal. The time of the signal, the propagation time of the ultrasonic signal is obtained and output to the microprocessor;

A microprocessor, configured to obtain a measurement result of the flow rate and/or a measurement result of the flow rate according to the propagation time of the ultrasonic signal.

By adopting the above technical solution, when the ultrasonic instrument measures flow velocity and flow, the amplification control module is used to amplify the signal of the excitation power supply and generate an excitation pulse voltage signal to drive the transducer, thereby increasing the amplitude of the ultrasonic signal emitted by the transducer. And the amplitude of the received ultrasonic echo signal becomes larger. The amplitude of the ultrasonic echo signal is much larger than the amplitude of the noise signal, so the ultrasonic echo signal is easier to detect, effectively avoiding confusion with the noise signal and improving the signal quality. The anti-interference ability of the transmission improves the accuracy of the microprocessor's flow rate and flow measurement results, that is, it improves the accuracy of ultrasonic instrument measurement.

In a specific implementation, the transducer includes a transmitting transducer and a receiving transducer;

The sending transducer is used to send out ultrasonic signals, and the receiving transducer is used to receive ultrasonic echo signals. Alternatively, the receiving transducer is used to send out ultrasonic signals, and the sending transducer is used to receive ultrasonic echo signals.

In a specific implementation, the ultrasonic instrument further includes an information collection module, and the information collection module is connected to a microprocessor;

The information collection module is used to collect pressure information and/or temperature information, and output the pressure information and/or temperature information to a microprocessor.

By adopting the above technical solution, the information acquisition module outputs the collected pressure information and/or temperature information to the microprocessor. The microprocessor combines the measured flow rate and flow rate and other parameters to obtain the gas to be measured in the pipeline after analysis. Or the current state of the liquid to be measured.

In a specific implementation, the ultrasonic instrument further includes a display module, and the display module is connected to a microprocessor;

The display module is used to display one or more of flow velocity measurement results, flow measurement results, pressure information, and temperature information.

By adopting the above technical solution, the microprocessor can display the measured parameters such as flow rate and flow rate as well as the collected information such as pressure and temperature through the display module, and can also display the analyzed current status of the gas to be measured or the liquid to be measured in the pipeline. The status and other information are displayed through the display module, allowing staff to observe the on-site situation in real time.

In a specific implementation, the ultrasonic instrument further includes a communication module, the communication module is connected to the microprocessor;

The communication module is used to remotely transmit one or more of the flow rate measurement results, flow measurement results, pressure information, and temperature information.

By adopting the above technical solution, the microprocessor can remotely transmit the measured parameters such as flow rate and flow rate, as well as the collected information such as pressure and temperature through the communication module, and can also analyze the gas to be measured or the liquid to be measured in the pipeline. The current status and other information are transmitted remotely through the communication module, making it easier for staff to remotely grasp the on-site situation.

To sum up, the technical solution of this application at least includes the following beneficial technical effects:

1. The amplification control module amplifies the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal. The amplitude of the ultrasonic signal is increased through the excitation pulse voltage signal, thereby increasing the amplitude of the ultrasonic echo signal, making the ultrasonic wave The echo signal is distinguished from the noise signal, without the need to customize large-volume transformers and related components. The electromagnetic compatibility is good, the control logic and circuit structure are simple, making the circuit more stable and reliable, and reducing costs;

2. The amplification control chip can generate a higher excitation pulse voltage signal by using the lower voltage signal of the excitation power supply, and has a better amplification effect on the amplitude of the ultrasonic signal and ultrasonic echo signal;

3. The amplification control chip enters sleep mode when not working, reducing power consumption and extending service life.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the ultrasonic amplification control circuit in Embodiment 1 of the present application;

Figure 2 is a schematic diagram of each pin of the amplification control chip 31 in Embodiment 1 of the present application;

Figure 3 is a voltage signal waveform diagram of the excitation power supply and an excitation pulse voltage signal waveform diagram in Embodiment 1 of the present application;

Figure 4 is a schematic diagram of the overall structure of the ultrasonic instrument in Embodiment 2 of the present application;

FIG. 5 is a schematic diagram of each pin of the amplification control chip 31 and the signal processing chip 51 in the second embodiment of the present application.

Explanation of reference symbols:

1. Microprocessor; 2. Ultrasonic signal transmitting and receiving measurement IC; 3. Amplification control module; 31. Amplification control chip; 4. Transducer; 41. Transmitting transducer; 42. Receiving transducer; 5. Signal processing module; 6. Information collection module; 7. Display module; 8. Communication module.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Example 1:

Referring to Figure 1, Embodiment 1 provides an ultrasonic amplification control circuit, which specifically includes a microprocessor 1, an ultrasonic signal transmitting and receiving measurement IC2, and an amplification control module 3. The functions of each part are as follows:

Microprocessor 1, used to output a first control signal to the ultrasonic signal transmitting and receiving measurement IC2, and also used to output a second control signal to the amplification control module 3;

Ultrasonic signal sending and receiving measurement IC2 is used to generate a square wave signal according to the first control signal and output it to the amplification control module 3;

The amplification control module 3 is configured to enter the working mode according to the second control signal and the square wave signal, and amplify the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, and the excitation pulse voltage signal is used for Increase the amplitude of the ultrasonic signal and ultrasonic echo signal.

Therefore, the amplification control module 3 amplifies the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, and increases the amplitude of the ultrasonic signal through the excitation pulse voltage signal, thereby increasing the amplitude of the ultrasonic echo signal, so that The ultrasonic echo signal is distinguished from the noise signal, and there is no need to customize large-volume transformers and related components. It has good electromagnetic compatibility, and the control logic and circuit structure are simple, making the circuit more stable and reliable and reducing costs.

Further, the amplification control module 3 is also used to enter the sleep mode according to the second control signal.

The following is a detailed description of the amplification control module 3 entering the working mode and sleep mode in conjunction with Figure 2:

The amplification control module 3 includes an amplification control chip 31. The amplification control chip 31 includes an OE pin, an IN2+ pin, an IN1+ pin, a VCC pin, an OUT1+ pin and an OUT2+ pin. Specifically, the amplification control chip 31 passes through the OE pin. The IN2+ pin is connected to the microprocessor 1. The amplification control chip 31 is connected to the ultrasonic signal transmitting and receiving measurement IC2 through the IN1+ pin. The VCC pin is used to receive the excitation power supply. The voltage value of the excitation power supply is V1. The amplification control chip 31 The OUT1+ pin and OUT2+ pin are the output pins of the chip.

The amplification control chip 31 also includes a VDD1 pin and a GND1 pin. The GND1 pin is grounded, and the VDD1 pin is used to connect the working power supply to power the amplification control chip 31. Therefore, by separating the working power supply and the excitation power supply for the chip, The power supply connected to the VDD1 pin and the VCC pin is isolated, which improves the safety of the chip operation. The steps for the amplification control chip 31 to amplify the received voltage signal of the excitation power supply to generate the excitation pulse voltage signal specifically include:

Referring to Table 1, if the signals output by the microprocessor 1 to the OE pin and the IN2+ pin are high level, the amplification control chip 31 enters the working mode;

After the amplification control chip 31 enters the working mode, if the square wave signal output by the ultrasonic signal sending and receiving measurement IC2 to the IN1+ pin is high level, the voltage value output by the OUT1+ pin of the amplification control chip 31 is 0, and the OUT2+ pin The output voltage value is V1, that is, the voltage value output by the amplification control chip 31 is the same as the voltage value of the excitation power supply; if the square wave signal output by the ultrasonic signal sending and receiving measurement IC2 to the IN1+ pin is low level, the amplification control chip The voltage value output by the OUT1+ pin of 31 is 0, and the voltage value output by the OUT2+ pin is -V1, that is, the voltage value output by the amplification control chip 31 is opposite to the voltage value of the excitation power supply; the voltage value output by the OUT1+ pin of the amplification control chip 31 is The voltage value and the voltage value output by the OUT2+ pin constitute the excitation pulse voltage signal.

Therefore, the maximum value of the excitation pulse voltage signal output by the amplification control chip 31 is V1 and the minimum value is -V1. When the microprocessor 1 keeps the level signals output to the OE pin and the IN2+ pin at high level, the ultrasonic Signal transmission and reception measurement The square wave signal output by IC2 to the IN1+ pin includes high level and low level. Refer to (a) and (b) in Figure 3. (a) in Figure 3 is the VCC pin. The voltage signal waveform diagram of the excitation power supply received by the pin. (b) in Figure 3 is the excitation pulse voltage signal waveform diagram output by the OUT1+ pin and the OUT2+ pin. The excitation pulse voltage signal generated by the amplification control chip 31 is the excitation pulse voltage signal of the excitation power supply. The voltage signal is amplified by 2 times, and the amplification control chip 31 realizes the signal amplification function. Therefore, the amplification control chip 31 uses the lower voltage signal of the excitation power supply to generate a higher excitation pulse voltage signal, which can improve the ultrasonic signal and ultrasonic echo. The amplification effect of signal amplitude is better.

Table 1 Amplification control chip 31 input pin and output pin status

OE pin IN1+ pin IN2+ pin OUT1+ pin OUT2+ pin Function 0 X X no output no output sleep mode 1 1 1 0 V1 The output voltage value is the same 1 0 1 0 -V1 The output voltage value is opposite

Referring to Table 1, if the signal output by the microprocessor 1 to the OE pin is low level, the amplification control chip 31 enters the sleep mode. At this time, no matter whether the signals input by the IN1+ pin and the IN2+ pin are high level or low level, the amplification control chip 31 enters the sleep mode. Flat, the OUT1+ pin and the OUT2+ pin of the amplification control chip 31 have no output, so the amplification control chip 31 can enter the sleep mode when it does not need to work, which reduces power consumption and extends the service life.

Example 2:

Referring to Figure 4, the second embodiment provides an ultrasonic instrument. The ultrasonic instrument adopts the ultrasonic amplification control circuit in the first embodiment. The ultrasonic instrument of this embodiment includes a microprocessor 1, an ultrasonic signal transmitting and receiving measurement IC2 and an amplification control module 3 , also includes a transducer 4 and a signal processing module 5.

The transducer 4 is used to receive the excitation pulse voltage signal output by the amplification control module 3, and according to the excitation pulse voltage signal, it sends out ultrasonic signals in the forward flow situation and the counter flow situation respectively, and then receives the ultrasonic echo in the forward flow situation and the counter flow situation. signal, output the ultrasonic echo signals under the downstream and countercurrent conditions to the signal processing module 5;

The signal processing module 5 is used to switch the downstream mode and the counterflow mode according to the ultrasonic echo signals in the downstream and counterflow situations, and is also used to convert the ultrasonic echo signals in the downstream and counterflow situations. Convert to sine wave signals and output to ultrasonic signal sending and receiving measurement IC2 respectively;

Ultrasonic signal transmission and reception measurement IC2 is used to convert the sine wave signal output by the signal processing module 5 into a corresponding square wave signal, and combines the ultrasonic signal transmission and reception measurement IC2 with the amplification control according to the time of conversion into the corresponding square wave signal. When the module 3 sends out the square wave signal, the time t1 of the ultrasonic signal propagating downstream and the time t2 of the countercurrent propagation are obtained, and the time t1 of the ultrasonic signal propagating downstream and the time t2 of the countercurrent propagation are output to the microprocessor 1;

The microprocessor 1 is used to obtain the measurement result of the flow velocity and/or the measurement result of the flow rate based on the time t1 of the ultrasonic signal propagating in the downstream and the time t2 of the ultrasonic signal traveling in the countercurrent.

When the ultrasonic instrument measures flow velocity and flow, the amplification control module 3 is used to amplify the signal of the excitation power supply and generate an excitation pulse voltage signal to drive the transducer 4, so that after the transducer 4 emits an ultrasonic signal, it is received at the same distance. The amplitude of the ultrasonic echo signal becomes larger, and the amplitude of the ultrasonic echo signal is much larger than the amplitude of the noise signal, making the ultrasonic echo signal easier to detect, effectively avoiding confusion with the noise signal, and improving signal transmission. The anti-interference ability further improves the accuracy of the flow rate and flow measurement results of the microprocessor 1, that is, the accuracy of the measurement of the ultrasonic instrument is improved; moreover, the circuit structure of the amplification control module 3 in the ultrasonic instrument in this embodiment is simple, There is no need to add other related components and the cost is low.

Referring to Figure 5, the amplification control module 3 includes an amplification control chip 31. The amplification control chip 31 is connected to the transducer 4 through the OUT1+ pin and the OUT2+ pin. The functions of each pin of the amplification control chip 31 refer to the description in Embodiment 1. I won’t go into details here; the signal processing module 5 includes a signal processing chip 51, and the signal processing chip 51 includes a VDD2 pin, a D1-pin, a D2-pin, a GND2 pin and a D2+ pin, where the VDD2 pin is used for Connect the working power supply to power the chip, the GND2 pin is grounded, the signal processing chip 51 is connected to the transducer 4 through the D1- pin and D2- pin, and the signal processing chip 51 is connected to the ultrasonic signal sending and receiving measurement IC2 through the D2+ pin. .

It should be noted that Figure 5 only depicts the working principle diagram of the ultrasonic instrument when the ultrasonic signal propagates downstream or countercurrent. If you want to obtain the measurement results of the flow velocity and/or the measurement result of the flow rate, the amplification control module 3 needs to It includes two amplification control chips 31. The two amplification control chips 31 are respectively connected to the microprocessor 1, the ultrasonic signal transmitting and receiving measurement IC2 and the transducer 4. Among the two amplification control chips 31, one of them is downstream. In this case, the second control signal and the square wave signal are received, and in the reverse flow case, the second control signal and the square wave signal are received. The following is a detailed description:

Among them, the transducer 4 includes a transmitting transducer 41 and a receiving transducer 42, and the ultrasonic signal transmitting and receiving measurement IC2 has a timing function.

In the case of downstream flow, the microprocessor 1 controls the ultrasonic signal sending and receiving measuring IC2 to output a square wave signal to one of the amplification control chips 31. At the same time, the ultrasonic signal sending and receiving measuring IC2 starts timing when it sends out a square wave signal. 1 also controls the amplification control chip 31 to generate an excitation pulse voltage signal, thereby driving the sending transducer 41 to emit an ultrasonic signal, and then the receiving transducer 42 receives the ultrasonic echo signal and outputs it to the signal processing module 5, and the signal processing module 5 switches to the downstream mode, and generates the corresponding sine wave signal and outputs it to the ultrasonic signal transmitting and receiving measurement IC2. The ultrasonic signal transmitting and receiving measurement IC2 converts the received sine wave signal into the corresponding square wave signal, and converts it into the corresponding By combining the time of the square wave signal with the time of sending the square wave signal under downstream conditions, the propagation time t1 of the ultrasonic signal under downstream conditions can be obtained.

Similarly, in the case of countercurrent, the microprocessor 1 controls the ultrasonic signal sending and receiving measurement IC2 to output a square wave signal to another amplification control chip 31. When the ultrasonic signal sending and receiving measuring IC2 sends out a square wave signal, the microprocessor starts timing. 1 also controls the amplification control chip 31 to generate an excitation pulse voltage signal, thereby driving the receiving transducer 42 to emit an ultrasonic signal, and then the transmitting transducer 41 receives the ultrasonic echo signal and outputs it to the signal processing module 5, and the signal processing module 5 switches to the countercurrent mode, and generates the corresponding sine wave signal and outputs it to the ultrasonic signal transmitting and receiving measurement IC2. The ultrasonic signal transmitting and receiving measurement IC2 converts the received sine wave signal into the corresponding square wave signal, and converts it into the corresponding square wave signal according to the method. By combining the time of the wave signal with the time of sending the square wave signal under counterflow, the propagation time t2 of the ultrasonic signal under counterflow can be obtained.

Of course, it can also be set so that the receiving transducer 42 emits the ultrasonic signal in the downstream situation, and the transmitting transducer 41 receives the ultrasonic echo signal, and in the countercurrent situation, the transmitting transducer 41 emits the ultrasonic signal, and the receiving transducer 41 Transducer 42 receives ultrasonic echo signals. Therefore, the sending transducer 41 described in this embodiment does not only have the function of sending ultrasonic signals, nor does the receiving transducer 42 only has the function of receiving the ultrasonic echo signals of ultrasonic waves. The two transducers can be used in downstream and countercurrent flows. In this case, one transmits the ultrasonic signal and the other receives the ultrasonic echo signal. This embodiment does not limit this.

Therefore, it can be seen that since both amplification control chips 31 amplify the voltage signal of the excitation power supply, the amplitude of the excitation pulse voltage signal output by each amplification control chip 31 for driving the transducer 4 is relatively large. The amplification control chip 31 amplifies the voltage signal of the excitation power supply and also amplifies the current of the excitation power supply, thereby increasing the current output to the transducer 4, thereby increasing the driving capability of the transducer 4. .

Further, the ultrasonic instrument also includes an information collection module 6. The information collection module 6 outputs the collected pressure information and/or temperature information to the microprocessor 1. The microprocessor 1 combines the measured parameters such as flow rate and flow rate, and passes The current state of the gas to be measured or the liquid to be measured in the pipeline is analyzed. The information collection module 6 may use a pressure sensor and/or a temperature sensor.

Further, the ultrasonic instrument also includes a display module 7. The microprocessor 1 can display the measured parameters such as flow rate and flow rate, and the collected information such as pressure and temperature through the display module 7, and can also display the analyzed parameters in the pipeline. Information such as the current status of the gas to be measured or the liquid to be measured is displayed through the display module 7 to facilitate the staff to observe the on-site situation in real time. The display module 7 can use a liquid crystal display screen.

Furthermore, the ultrasonic instrument also includes a communication module 8. The microprocessor 1 can remotely transmit the measured parameters such as flow rate and flow rate, as well as the collected information such as pressure and temperature through the communication module 8, and can also transmit the analyzed parameters in the pipeline. Information such as the current status of the gas to be measured or the liquid to be measured is remotely transmitted through the communication module 8, which facilitates the staff to remotely grasp the on-site situation.

The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the scope of protection of the present application. Inside.

Claims (10)

1. An ultrasonic amplification control circuit, comprising: the ultrasonic signal transmitting and receiving device comprises a microprocessor (1), an ultrasonic signal transmitting and receiving measuring IC (2) and an amplifying control module (3);

the microprocessor (1) is used for outputting a first control signal to the ultrasonic signal transmitting and receiving measuring IC (2) and outputting a second control signal to the amplifying control module (3);

the ultrasonic signal sending and receiving measurement IC (2) is used for generating a square wave signal according to the first control signal and outputting the square wave signal to the amplification control module (3);

the amplification control module (3) is used for entering a working mode according to the second control signal and the square wave signal, amplifying the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, and the excitation pulse voltage signal is used for increasing the amplitude of the ultrasonic wave signal and the amplitude of the ultrasonic wave echo signal.

2. The ultrasonic amplification control circuit of claim 1, wherein: the amplifying control module (3) comprises an amplifying control chip (31), the amplifying control chip (31) comprises an OE pin, an In2+ pin, an In1+ pin, a VCC pin, an OUT1+ pin and an OUT2+ pin, the VCC pin is used for being connected with an exciting power supply, the voltage value of the exciting power supply is V1, and the OUT1+ pin and the OUT2+ pin are output pins of the amplifying control chip (31);

the microprocessor (1) is used for outputting a second control signal to an OE pin and an In2+ pin of the amplification control chip (31);

the ultrasonic signal transmitting and receiving measurement IC (2) is used for outputting square wave signals to an IN1+ pin of the amplification control chip (31);

the amplification control chip (31) is used for entering a working mode according to the second control signal and the square wave signal, and amplifying the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal.

3. The ultrasonic amplification control circuit of claim 2, wherein: the amplifying control chip (31) amplifies the received voltage signal of the exciting power supply to generate an exciting pulse voltage signal, which specifically comprises the following steps:

if the signals output by the microprocessor (1) to the OE pin and the In2+ pin are both high level, the amplification control chip (31) enters a working mode;

after the amplification control chip (31) enters the working mode: if the square wave signal output by the ultrasonic signal transmitting and receiving measurement IC (2) to the In1+ pin is at a high level, the voltage value output by the OUT1+ pin is 0, and the voltage value output by the OUT2+ pin is V1; if the square wave signal output by the ultrasonic signal transmitting and receiving measurement IC (2) to the In1+ pin is at a low level, the voltage value output by the OUT1+ pin is 0, and the voltage value output by the OUT2+ pin is-V1;

the voltage value output by the OUT < 1+ > pin and the voltage value output by the OUT < 2+ > pin form an excitation pulse voltage signal.

4. The ultrasonic amplification control circuit of claim 2, wherein: the amplification control module (3) is further used for entering a sleep mode according to the second control signal.

5. The ultrasonic amplification control circuit of claim 4, wherein: the step of the amplification control module (3) further for entering a sleep mode according to the second control signal specifically includes:

if the signal output by the microprocessor (1) to the OE pin is at a low level, the amplification control chip (31) enters a sleep mode, and the OUT1+ pin and the OUT2+ pin of the amplification control chip (31) are not output.

6. An ultrasonic instrument, characterized in that: the ultrasonic instrument comprises the ultrasonic amplification control circuit as claimed in any one of claims 1 to 5, and further comprises a transducer (4) and a signal processing module (5), wherein the transducer (4) is connected with the amplification control module (3), and the signal processing module (5) is connected with an ultrasonic signal transmitting and receiving measurement IC (2);

the transducer (4) is used for receiving the excitation pulse voltage signal output by the amplification control module (3), sending out an ultrasonic signal according to the excitation pulse voltage signal, receiving an ultrasonic echo signal and outputting the ultrasonic echo signal to the signal processing module (5);

the signal processing module (5) is used for converting the ultrasonic echo signals into corresponding sine wave signals and outputting the sine wave signals to the ultrasonic signal transmitting and receiving measurement IC (2);

the ultrasonic signal sending and receiving measurement IC (2) is used for converting the sine wave signal into a corresponding square wave signal, and according to the time converted into the corresponding square wave signal, combining the time of sending the square wave signal to the amplification control module (3) by the ultrasonic signal sending and receiving measurement IC (2), obtaining the propagation time of the ultrasonic signal and outputting the propagation time to the microprocessor (1);

and the microprocessor (1) is used for obtaining a flow velocity measurement result and/or a flow measurement result according to the propagation time of the ultrasonic signal.

7. The ultrasonic instrument of claim 6, wherein: the transducer (4) comprises a transmitting transducer (41) and a receiving transducer (42);

the transmitting transducer (41) is used for transmitting ultrasonic signals, the receiving transducer (42) is used for receiving ultrasonic echo signals, or,

the receiving transducer (42) is used for sending out ultrasonic signals, and the sending transducer (41) is used for receiving ultrasonic echo signals.

8. The ultrasonic instrument of claim 6, wherein: the ultrasonic instrument further comprises an information acquisition module (6), and the information acquisition module (6) is connected with the microprocessor (1);

the information acquisition module (6) is used for acquiring pressure information and/or temperature information and outputting the pressure information and/or the temperature information to the microprocessor (1).

9. The ultrasonic instrument of claim 6, wherein: the ultrasonic instrument further comprises a display module (7), and the display module (7) is connected with the microprocessor (1);

the display module (7) is used for displaying one or more of flow velocity measurement results, flow measurement results, pressure information and temperature information.

10. The ultrasonic instrument of claim 6, wherein: the ultrasonic instrument further comprises a communication module (8), and the communication module (8) is connected with the microprocessor (1);

the communication module (8) is used for remotely transmitting one or more of a flow velocity measurement result, a flow measurement result, pressure information and temperature information.