CN116961629A - Ultrasonic amplification control circuit and ultrasonic instrument using same - Google Patents
Ultrasonic amplification control circuit and ultrasonic instrument using same Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/02—Shaping pulses by amplifying
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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
Technical Field
The application relates to the technical field of ultrasonic instruments, in particular to an ultrasonic amplification control circuit and an ultrasonic instrument using the same.
Background
The ultrasonic instrument is a contact type measuring instrument and comprises an ultrasonic heat meter, an ultrasonic water meter, an ultrasonic gas meter and the like, wherein the ultrasonic instrument adopts an advanced multi-pulse technology, a signal digital processing technology and an error correction technology, and the parameters such as the flow rate and the flow velocity of liquid or gas are measured by means of the time difference between forward flow propagation and backward flow propagation of ultrasonic signals in the liquid or gas; meanwhile, the ultrasonic instrument can not change the flowing state of liquid or gas, can not generate pressure loss, and is convenient to install, so that the ultrasonic instrument is widely applied to various fields by virtue of the advantages of convenience in metering, low cost, accurate metering result and the like.
However, when parameters such as the flow rate of gas or liquid are measured by adopting the ultrasonic instrument in environments with longer pipeline distances, the ultrasonic signals sent by the transducer at the transmitting end of the ultrasonic instrument are attenuated faster in the propagation process due to long channel distances, so that the amplitude of the ultrasonic echo signals received by the transducer at the receiving end of the ultrasonic instrument is smaller, the ultrasonic echo signals are easily mixed with noise signals when the ultrasonic instrument analyzes the measurement results, the ultrasonic echo signals are difficult to distinguish, inaccurate measurement results of the ultrasonic instrument are caused, and the accuracy of the measurement results is reduced.
Therefore, in order to better distinguish the ultrasonic echo signals from the noise signals, the accuracy of the ultrasonic instrument on the measurement results of parameters such as flow and flow speed is improved, the current traditional mode is to control and increase the amplitude of the ultrasonic signals sent by the transducer of the ultrasonic instrument in a transformer boosting mode, so that the amplitude of the ultrasonic echo signals is larger than the noise signals, and the distinction is carried out, but the transformer boosting mode is adopted, a large-volume transformer is required to be customized, EMC (electro magnetic compatibility) problems are also brought, the complexity of a circuit structure and the number of related components are also increased, and the production cost is increased.
Disclosure of Invention
In order to increase the amplitude of an ultrasonic wave signal and an ultrasonic wave echo signal, the ultrasonic wave echo signal is distinguished from a noise signal, and meanwhile, the circuit structure is simplified, and the application provides an ultrasonic wave amplification control circuit and an ultrasonic instrument using the same.
In a first aspect, the present application provides an ultrasonic amplification control circuit, which adopts the following technical scheme: the ultrasonic signal transmission and reception measuring IC comprises a microprocessor, an ultrasonic signal transmission and reception measuring IC and an amplification control module;
the microprocessor is used for outputting a first control signal to the ultrasonic signal transmitting and receiving measurement IC and outputting a second control signal to the amplification control module;
the ultrasonic signal sending and receiving measurement IC 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;
the amplification control module 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 signal and the ultrasonic echo signal.
By adopting the technical scheme, the amplification control module amplifies the voltage signal of the excitation power supply to generate the excitation pulse voltage signal, the amplitude of the ultrasonic signal is increased through the excitation pulse voltage signal, and then the amplitude of the ultrasonic echo signal is increased, so that the ultrasonic echo signal is distinguished from the noise signal, a large-volume transformer and related components are not required to be customized, the electromagnetic compatibility is good, the control logic and the circuit are simple in structure, the circuit is more stable and reliable, and the cost is reduced.
IN a specific implementation manner, the amplification control module comprises an amplification control chip, wherein the amplification control chip 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 connecting an excitation power supply, the voltage value of the excitation power supply is V1, and the out1+ pin and the out2+ pin are output pins of the amplification control chip;
the microprocessor is used for outputting a second control signal to an OE pin and an In2+ pin of the amplification control chip;
the ultrasonic signal sending and receiving measurement IC is used for outputting square wave signals to an IN < 1+ > pin of the amplification control chip;
the amplification control chip 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.
By adopting the technical scheme, the higher excitation pulse voltage signal can be generated by using the lower voltage signal of the excitation power supply, and the amplification effect on the ultrasonic signal and the amplitude of the ultrasonic echo signal is better.
In a specific embodiment, the step of amplifying the received voltage signal of the excitation power supply by the amplification control chip to generate an excitation pulse voltage signal 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 a working mode; after the amplification control chip enters the working mode: if the square wave signal output by the ultrasonic signal transmitting and receiving measurement IC to the IN1+ pin is 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 to the IN1+ pin 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 OUT < 1+ > pin and the voltage value output by the OUT < 2+ > pin form an excitation pulse voltage signal.
By adopting the technical scheme, the microprocessor controls the amplification control chip to enter the working mode, and the amplification control chip transmits and receives the high level and the low level of the square wave signal output by the measurement IC according to the ultrasonic signal, so that the voltage value of the output pin is equal to the voltage value of the excitation power supply or the opposite number of the voltage value of the excitation power supply, and the voltage signal of the excitation power supply is amplified by 2 times to generate an excitation pulse voltage signal.
In a specific embodiment, the amplification control module is further configured to enter a sleep mode according to the second control signal.
By adopting the technical scheme, when the working is not needed, the microprocessor can also control the amplification control module to enter the sleep mode, so that the power consumption is reduced, the electric energy is saved, and the service life is prolonged.
In a specific embodiment, the step of the amplification control module further configured to enter the sleep mode according to the second control signal specifically includes:
if the signal output by the microprocessor to the OE pin is low level, the amplification control chip enters a sleep mode, and the OUT1+ pin and the OUT2+ pin of the amplification control chip are not output.
In a second aspect, the present application provides an ultrasonic apparatus, which adopts the following technical scheme: the ultrasonic instrument comprises the ultrasonic amplification control circuit, a transducer and a signal processing module, wherein the transducer is connected with the amplification control module, and the signal processing module is connected with an ultrasonic signal transmitting and receiving measurement IC;
the transducer is used for receiving the excitation pulse voltage signal output by the amplification control module, 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;
the signal processing module 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 measuring IC;
the ultrasonic signal sending and receiving measurement IC 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 and the time when the ultrasonic signal sending and receiving measurement IC sends the square wave signal to the amplification control module, the propagation time of the ultrasonic signal is obtained and output to the microprocessor;
and the microprocessor is used for obtaining a flow velocity measurement result and/or a flow measurement result according to the propagation time of the ultrasonic signal.
By adopting the technical scheme, when the ultrasonic instrument measures the flow velocity and the flow rate, the amplification control module is adopted to amplify the signal of the excitation power supply and generate the excitation pulse voltage signal for driving the transducer, so that the amplitude of the ultrasonic signal sent by the transducer and the amplitude of the received ultrasonic echo signal become larger, the amplitude of the ultrasonic echo signal is far larger than the amplitude of the noise signal, the ultrasonic echo signal is easier to detect, confusion with the noise signal is effectively avoided, the anti-interference capability of signal transmission is improved, and the accuracy of the microprocessor on the flow velocity and the flow rate measurement result is further improved, namely the metering accuracy of the ultrasonic instrument is improved.
In a specific embodiment, the transducers include a transmitting transducer and a receiving transducer;
the transmitting transducer is used for transmitting ultrasonic signals, the receiving transducer is used for receiving ultrasonic echo signals, or the receiving transducer is used for transmitting ultrasonic signals, and the transmitting transducer is used for receiving ultrasonic echo signals.
In a specific embodiment, the ultrasonic instrument further comprises an information acquisition module, and the information acquisition module is connected with the microprocessor;
the information acquisition module is used for acquiring pressure information and/or temperature information and outputting the pressure information and/or the temperature information to the microprocessor.
By adopting the technical scheme, the information acquisition module outputs the acquired pressure information and/or temperature information to the microprocessor, and the microprocessor combines the parameters such as the flow rate and the flow rate obtained by measurement, and the current state of the gas to be detected or the liquid to be detected in the pipeline can be obtained through analysis.
In a specific embodiment, the ultrasonic instrument further comprises a display module, the display module being connected to the microprocessor;
the display module is used for displaying one or more of flow velocity measurement results, flow measurement results, pressure information and temperature information.
Through adopting above-mentioned technical scheme, microprocessor can be with parameters such as velocity of flow and flow that the measurement obtained and information such as pressure and the temperature that gathers show through display module, can also show the information such as the present state of gas or liquid that awaits measuring in the pipeline that obtains through display module with the analysis, the staff of being convenient for observe the scene condition in real time.
In a specific embodiment, the ultrasonic instrument further comprises a communication module, wherein the communication module is connected with the microprocessor;
the communication module is used for remotely transmitting one or more of flow velocity measurement results, flow measurement results, pressure information and temperature information.
Through adopting above-mentioned technical scheme, microprocessor can realize remote transmission with the information such as parameter such as velocity of flow and flow that the measurement obtained and pressure and temperature that gathers through communication module, can also realize remote transmission with the information such as the present state of gas or liquid that awaits measuring in the pipeline that the analysis obtained through communication module, the staff of being convenient for master the scene condition in a long-range.
In summary, the technical scheme of the application at least comprises the following beneficial technical effects:
1. the voltage signal of the received excitation power supply is amplified by the amplification control module to generate an excitation pulse voltage signal, the amplitude of the ultrasonic wave signal is increased by the excitation pulse voltage signal, and then the amplitude of the ultrasonic wave echo signal is increased, so that the ultrasonic wave echo signal is distinguished from the noise signal, a large-volume transformer and related components are not required to be customized, the electromagnetic compatibility is good, the control logic and circuit structure are simple, the circuit is more stable and reliable, and the cost is reduced;
2. the amplification control chip can generate a higher excitation pulse voltage signal by using a lower voltage signal of the excitation power supply, and has a better amplification effect on ultrasonic signals and ultrasonic echo signal amplitudes;
3. the amplification control chip enters a sleep mode when not in need of working, so that the power consumption is reduced, and the service life is prolonged.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an ultrasonic amplification control circuit according to a first embodiment of the present application;
fig. 2 is a schematic diagram of each pin of the amplifying control chip 31 in the first embodiment of the present application;
FIG. 3 is a voltage signal waveform diagram and an excitation pulse voltage signal waveform diagram of an excitation power supply according to a first embodiment of the present application;
FIG. 4 is a schematic view showing the overall structure of an ultrasonic apparatus according to a second embodiment of the present application;
fig. 5 is a schematic diagram of pins of the amplifying control chip 31 and the signal processing chip 51 in the second embodiment of the present application.
Reference numerals illustrate:
1. a microprocessor; 2. an ultrasonic signal transmitting and receiving measurement IC; 3. an amplification control module; 31. an amplification control chip; 4. a transducer; 41. a transmitting transducer; 42. a receiving transducer; 5. a signal processing module; 6. an information acquisition module; 7. a display module; 8. and a communication module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Embodiment one:
referring to fig. 1, a first embodiment 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, and functions of the respective parts are as follows:
the microprocessor 1 is used for outputting a first control signal to the ultrasonic signal transmitting and receiving measurement IC2 and outputting a second control signal to the amplification control module 3;
the ultrasonic signal sending and receiving measurement IC2 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 configured to enter a working mode according to the second control signal and the square wave signal, and amplify a received voltage signal of the excitation power supply to generate an excitation pulse voltage signal, where the excitation pulse voltage signal is used to increase the amplitudes of the ultrasonic signal and the ultrasonic echo signal.
Therefore, the received voltage signal of the excitation power supply is amplified by the amplification control module 3 to generate an excitation pulse voltage signal, the amplitude of the ultrasonic signal is increased by the excitation pulse voltage signal, and then the amplitude of the ultrasonic echo signal is increased, so that the ultrasonic echo signal is distinguished from the noise signal, a large-volume transformer and related components are not required to be customized, the electromagnetic compatibility is good, the control logic and circuit structure are simple, the circuit is more stable and reliable, and the cost is reduced.
Further, the amplification control module 3 is further configured to enter a sleep mode according to the second control signal.
The following describes the operation mode and sleep mode of the amplification control module 3 in detail with reference to fig. 2:
the amplification control module 3 includes an amplification control chip 31, where 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, and specifically, the amplification control chip 31 is connected to the microprocessor 1 through the OE pin and the in2+ pin, 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 an excitation power supply, a voltage value of the excitation power supply is V1, and the out1+ pin and the out2+ pin of the amplification control chip 31 are output pins of the chip.
The amplification control chip 31 further includes a VDD1 pin and a GND1 pin, where the GND1 pin is grounded, and the VDD1 pin is used to connect a working power supply to supply power to the amplification control chip 31, so that by separating the working power supply supplied by the chip from an excitation power supply, the power supplies connected by the VDD1 pin and the VCC pin are isolated, which improves the safety of the chip operation, and the step of amplifying, by the amplification control chip 31, the received voltage signal of the excitation power supply to generate an excitation pulse voltage signal specifically includes:
referring to table 1, if the signals output from the microprocessor 1 to the OE pin and the in2+ pin are high, the amplification control chip 31 enters an operation 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 IC2 to the in1+ pin is at a high level, the voltage value output by the out1+ pin of the amplification control chip 31 is 0, and the voltage value output by the out2+ pin is V1, i.e. 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 transmitting and receiving measurement IC2 to the in1+ pin is at a low level, the voltage value output by the out1+ pin of the amplification control chip 31 is 0, and the voltage value output by the out2+ pin is-V1, i.e., 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 and the voltage value output by the OUT2+ pin of the amplification control chip 31 constitute an excitation pulse voltage signal.
Therefore, when the maximum value of the excitation pulse voltage signal outputted from the amplification control chip 31 is V1 and the minimum value is-V1, and the level signals outputted to the OE pin and the in2+ pin are both high, the square wave signal outputted from the ultrasonic signal transmitting and receiving measurement IC2 to the in1+ pin includes a high level and a low level, referring to fig. 3 (a) and fig. 3 (b), fig. 3 (a) is a voltage signal waveform diagram of the excitation power source received by the VCC pin, fig. 3 (b) is an excitation pulse voltage signal waveform diagram outputted from the OUT1+ pin and the OUT2+ pin, and the amplification control chip 31 amplifies the voltage signal of the excitation power source by 2 times, so that the amplification control chip 31 can generate a higher excitation pulse voltage signal by using the voltage signal of the excitation power source, and the amplification effect on the amplitude of the ultrasonic signal and the ultrasonic echo signal is better.
Table 1 amplification control chip 31 input pin and output pin states
| OE pin | In1+ pin | In2+ pin | OUT1+ pin | OUT2+ pin | Function of |
| 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 from the microprocessor 1 to the OE pin is low, the amplification control chip 31 enters the sleep mode, and no matter the signals input from the in1+ pin and the in2+ pin are high or low, the OUT1+ pin and the OUT2+ pin of the amplification control chip 31 are not output, so that the amplification control chip 31 can enter the sleep mode when not required to work, thereby reducing power consumption and prolonging service life.
Embodiment two:
referring to fig. 4, a second embodiment provides an ultrasonic apparatus, which adopts the ultrasonic amplification control circuit in the first embodiment, and the ultrasonic apparatus of this embodiment includes a microprocessor 1, an ultrasonic signal transmitting and receiving measurement IC2, an amplification control module 3, a transducer 4, and a signal processing module 5.
The transducer 4 is used for receiving the excitation pulse voltage signal output by the amplification control module 3, sending out ultrasonic signals under the forward flow condition and the backward flow condition according to the excitation pulse voltage signal, receiving ultrasonic echo signals under the forward flow condition and the backward flow condition, and outputting the ultrasonic echo signals under the forward flow condition and the backward flow condition to the signal processing module 5;
the signal processing module 5 is used for switching the forward flow mode and the backward flow mode according to the ultrasonic echo signals under the forward flow condition and the backward flow condition, and is also used for respectively converting the ultrasonic echo signals under the forward flow condition and the backward flow condition into sine wave signals and respectively outputting the sine wave signals to the ultrasonic signal transmitting and receiving measurement IC2;
the ultrasonic signal sending and receiving measurement IC2 is configured to convert the sine wave signal output by the signal processing module 5 into a corresponding square wave signal, and combine the time of sending the square wave signal to the amplification control module 3 by the ultrasonic signal sending and receiving measurement IC2 according to the time converted into the corresponding square wave signal to obtain the time t1 of forward propagation and the time t2 of backward propagation of the ultrasonic signal, and output the time t1 of forward propagation and the time t2 of backward propagation of the ultrasonic signal to the microprocessor 1;
the microprocessor 1 is used for obtaining a flow velocity measurement result and/or a flow measurement result according to the downstream propagation time t1 and the upstream propagation time t2 of the ultrasonic signal.
When the ultrasonic instrument measures the flow velocity and the flow rate, the amplification control module 3 is adopted to amplify the signal of the excitation power supply and generate an excitation pulse voltage signal for driving the transducer 4, so that after the transducer 4 sends out ultrasonic signals, the amplitude of an ultrasonic echo signal received at the same distance is increased, the amplitude of the ultrasonic echo signal is far greater than that of a noise signal, the ultrasonic echo signal is easier to detect, confusion with the noise signal is effectively avoided, the anti-interference capability of signal transmission is improved, and the accuracy of the microprocessor 1 on the flow velocity and the flow rate measurement result is improved, namely the metering accuracy of the ultrasonic instrument is improved; in addition, the amplifying control module 3 in the ultrasonic instrument in the embodiment has simple circuit structure, does not need to add other related components and parts, and has lower cost.
Referring to fig. 5, the amplification control module 3 includes an amplification control chip 31, where the amplification control chip 31 is connected to the transducer 4 through an OUT1+ pin and an OUT2+ pin, and the functions of the pins of the amplification control chip 31 are described in the first embodiment, and are not described herein again; the signal processing module 5 comprises a signal processing chip 51, the signal processing chip 51 comprises a VDD2 pin, a D1-pin, a D2-pin, a GND2 pin and a D2+ pin, wherein the VDD2 pin is used for being connected with a working power supply to supply power to the chip, the GND2 pin is grounded, the signal processing chip 51 is connected with the transducer 4 through the D1-pin and the D2-pin, and the signal processing chip 51 is connected with the ultrasonic signal transmitting and receiving measurement IC2 through the D2+ pin.
It should be noted that, fig. 5 only depicts a working schematic diagram of the ultrasonic instrument when the ultrasonic signal propagates in the forward direction or in the backward direction, if the measurement result of the flow rate and/or the measurement result of the flow are to be obtained, the amplification control module 3 needs to include two amplification control chips 31, where the two amplification control chips 31 are connected to the microprocessor 1, the ultrasonic signal transmitting and receiving measurement IC2 and the transducer 4, respectively, one of the two amplification control chips 31 is used to receive the second control signal and the square wave signal in the forward direction, and the other is used to receive the second control signal and the square wave signal in the backward direction, which is described in detail below:
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 forward flow situation, the microprocessor 1 controls the ultrasonic signal sending and receiving measurement IC2 to output square wave signals to one of the amplifying control chips 31, and at the same time, the ultrasonic signal sending and receiving measurement IC2 starts timing when sending square wave signals, the microprocessor 1 also controls the amplifying control chip 31 to generate exciting pulse voltage signals, so as to drive the sending transducer 41 to send ultrasonic signals, then the receiving transducer 42 receives ultrasonic echo signals and outputs the ultrasonic echo signals to the signal processing module 5, the signal processing module 5 switches to the forward flow mode, and generates corresponding sine wave signals to output to the ultrasonic signal sending and receiving measurement IC2, the ultrasonic signal sending and receiving measurement IC2 converts the received sine wave signals into corresponding square wave signals, and the propagation time t1 of the ultrasonic signals in the forward flow situation can be obtained according to the time converted into the corresponding square wave signals and the time when sending the square wave signals in the forward flow situation.
Similarly, in the case of countercurrent, the microprocessor 1 controls the ultrasonic signal transmitting and receiving measurement IC2 to output a square wave signal to the other amplification control chip 31, and when the ultrasonic signal transmitting and receiving measurement IC2 sends the square wave signal, the microprocessor 1 also controls the amplification control chip 31 to generate an excitation pulse voltage signal, so as to drive the receiving transducer 42 to send an ultrasonic signal, and then the transmitting transducer 41 receives an ultrasonic echo signal and outputs the ultrasonic echo signal to the signal processing module 5, the signal processing module 5 switches to the countercurrent mode, and generates a corresponding sine wave signal to output to the ultrasonic signal transmitting and receiving measurement IC2, and the ultrasonic signal transmitting and receiving measurement IC2 converts the received sine wave signal into a corresponding square wave signal, and combines the time of sending the square wave signal under the countercurrent condition according to the time converted into the corresponding square wave signal, so that the propagation time t2 of the ultrasonic signal under the countercurrent condition can be obtained.
Of course, it is also possible to set that the receiving transducer 42 emits an ultrasonic wave signal in the forward flow, the transmitting transducer 41 receives an ultrasonic wave echo signal, and the transmitting transducer 41 emits an ultrasonic wave signal in the backward flow, and the receiving transducer 42 receives an ultrasonic wave echo signal. Therefore, the transmitting transducer 41 described in this embodiment does not only transmit an ultrasonic signal, the receiving transducer 42 does not only receive an ultrasonic echo signal, and both transducers can perform the function of transmitting an ultrasonic signal and receiving an ultrasonic echo signal in both forward and backward directions, which is not limited in this embodiment.
Therefore, it can be seen that since the two amplification control chips 31 amplify the voltage signal of the excitation power supply, the amplitude of the excitation pulse voltage signal for driving the transducer 4 output from each amplification control chip 31 is large, and the amplification control chip 31 amplifies the current of the excitation power supply while amplifying the voltage signal of the excitation power supply, thereby increasing the current output to the transducer 4, and thus increasing the driving capability of the transducer 4.
Further, the ultrasonic instrument further comprises an information acquisition module 6, the information acquisition module 6 outputs the acquired 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 the like, the current state of the gas to be detected or the liquid to be detected in the pipeline is obtained through analysis, and a pressure sensor and/or a temperature sensor can be adopted for acquiring the information in the information acquisition module 6.
Further, the ultrasonic instrument further comprises a display module 7, the microprocessor 1 can display parameters such as flow rate and flow rate obtained by measurement and collected information such as pressure and temperature through the display module 7, and can display information such as the current state of gas to be detected or liquid to be detected in a pipeline obtained by analysis through the display module 7, so that workers can observe the site conditions in real time, and the display module 7 can adopt a liquid crystal display.
Further, the ultrasonic instrument further comprises a communication module 8, the microprocessor 1 can realize remote transmission of parameters such as flow speed and flow rate obtained by measurement and collected information such as pressure and temperature through the communication module 8, and can also realize remote transmission of information such as current state of gas to be detected or liquid to be detected in a pipeline obtained by analysis through the communication module 8, so that workers can conveniently grasp site conditions remotely.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
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.
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