Doppler current meter with audio output function and operation method thereof

Abstract

The invention provides a Doppler current meter with an audio output function and an operation method thereof. The Doppler current meter with the audio output function comprises a transducer group, a transmitting circuit, a controller, a clock and control circuit, an IQ demodulation circuit module and an audio module, wherein a clock control signal output end of the controller is connected with a clock control signal input end of the clock and control circuit; the signal output end of the clock and control circuit is connected with the signal input end of the transmitting circuit; the signal output end of the transmitting circuit is connected with the transmitting signal input end of the transducer group; a receiving signal of the transducer group is input to the controller through the IQ demodulation circuit module; the audio signal output end of the controller is connected with the signal input end of the audio module.

Description

Technical Field

[0001] The invention provides a Doppler flow meter with an audio output function and an operation method thereof, belonging to the technical field of water flow detection. Background Art

[0002] In the application of liquid velocity and flow monitoring, the signal is generally used to measure the liquid velocity, and then the flow rate is calculated by multiplying the velocity by the area. The key is the velocity measurement. In order to measure the liquid velocity, devices based on the Doppler principle are usually used, such as radar flowmeters and ultrasonic Doppler flowmeters.

[0003] When installing or using the flow meter, the flow meter needs to do the following two things:

[0004] 1. The point where the fluid velocity needs to be measured is consistent with the signal or radar measurement area:

[0005] 2. Strong signal at the measuring point

[0006] Since signals and electromagnetic waves are invisible, and the liquid flow is complex, such as natural rivers, the reflection effects and flow rates in different areas vary greatly, so when using it, you will encounter the following problems:

[0007] 1. It is impossible to quickly check the size of the signal in the measured area in real time through the device. Generally, the flow meter equipment does not display the signal size. To see the signal-to-noise ratio of the signal, a special debugging tool is generally required. In this way, it is impossible to provide real-time feedback to the operator, which brings inconvenience to use, installation and debugging;

[0008] 2. The flow rate displayed by the instrument is usually the average result of a period of measurement to ensure data stability. However, it is impossible to quickly check the speed and flow direction changes in the measured direction in real time, which makes it difficult to establish a correlation between the actual water flow and the instrument flow rate value, and the operator cannot adjust the detection area in time. Summary of the invention

[0009] The present invention provides a Doppler flow meter with an audio output function and an operation method thereof, which are used to solve the technical problems existing in the above-mentioned prior art. The technical solutions adopted are as follows:

[0010] A Doppler flowmeter with an audio output function, comprising a transducer group, a transmitting circuit, a controller, a clock and control circuit, an IQ demodulation circuit module and an audio module; wherein the clock control signal output end of the controller is connected to the clock control signal input end of the clock and control circuit; the signal output end of the clock and control circuit is connected to the signal input end of the transmitting circuit; the signal output end of the transmitting circuit is connected to the transmitting signal input end of the transducer group; the received signal of the transducer group is input to the controller through the IQ demodulation circuit module; the audio signal output end of the controller is connected to the signal input end of the audio module.

[0011] Furthermore, the controller includes a flow rate calculation module and an audio processing module; wherein the signal input ends of the flow rate calculation module and the audio processing module are connected to the signal output end of the IQ demodulation circuit module; wherein the signal input ends of the flow rate calculation module and the audio processing module are used to input the I signal and Q signal output by the LPF circuit.

[0012] Furthermore, the IQ demodulation circuit module includes a receiving circuit, an IQ demodulation circuit and an LPF circuit; the LPF circuit is a low pass filter (Low Pass Filter); wherein the receiving circuit is signal-connected to the receiving transducer in the transducer group; the signal output end of the receiving circuit is connected to the signal input end of the IQ demodulation circuit; the signal output end of the IQ demodulation circuit is connected to the signal input end of the LPF circuit; the signal output end of the LPF circuit is connected to the I signal and Q signal input ends of the controller.

[0013] Furthermore, the transducer group includes a transmitting transducer and a receiving transducer; wherein the transmitting transducer is signal-connected to the transmitting circuit; and the receiving transducer is signal-connected to the IQ demodulation circuit module.

[0014] Furthermore, the audio module includes an audio circuit and a speaker; wherein the signal input end of the audio circuit is connected to the audio signal output end of the controller; and the audio signal output end of the audio circuit is connected to the audio signal input end of the speaker.

[0015] Furthermore, the Doppler flowmeter with audio output function also includes a display; wherein a display control signal input terminal of the display is connected to a display control signal output terminal of the controller.

[0016] An operating method of the Doppler flow meter with audio output function according to claim 1, the operating method comprising:

[0017] Determine the area where the flow velocity needs to be measured based on the water flow cross section as the target water flow area;

[0018] Aim the Doppler flowmeter at the area where the flow velocity needs to be measured, and display the flow velocity value through the Doppler flowmeter;

[0019] The audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker; wherein the I signal represents an isotropic component signal; and the Q signal represents an orthogonal component signal.

[0020] Further, the Doppler flowmeter is aligned with the area where the flow velocity needs to be measured, and the flow velocity value is displayed by the Doppler flowmeter, including:

[0021] The Doppler current meter transmits a signal to the target water flow area through a transmitting circuit and a transmitting transducer;

[0022] The Doppler current meter obtains the signal reflected by the target water flow area through a receiving transducer and a receiving circuit;

[0023] The signal reflected by the target water flow area is demodulated by an IQ demodulation circuit to obtain an I signal and a Q signal corresponding to the signal reflected by the target water flow area, wherein the I signal represents an in-phase component signal; and the Q signal represents an orthogonal component signal;

[0024] Analyze the phase and amplitude between the I signal and the Q signal to obtain frequency shift information and angle parameters in the signal reflected from the target water flow area;

[0025] The water flow velocity is obtained by using the frequency shift information and angle parameters in the signal reflected by the target water flow area, and the water flow velocity is displayed.

[0026] Furthermore, the audio processing module of the controller processes the I signal and the Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker, including:

[0027] Extracting the I signal and Q signal corresponding to the signal reflected in the target water flow area; wherein the I signal represents the in-phase component signal; and the Q signal represents the orthogonal component signal;

[0028] Analyzing and calibrating the phase and amplitude between the I signal and the Q signal to obtain calibrated phase data and amplitude data;

[0029] Reconstruct and generate a water flow characteristic audio signal using the phase data and amplitude data;

[0030] Performing audio enhancement processing and audio format conversion on the water flow characteristic audio signal to obtain an audio signal after the audio enhancement processing and audio format conversion;

[0031] The audio signal is amplified and output through the speaker.

[0032] Beneficial effects of the present invention:

[0033] A Doppler current meter with an audio output function and an operating method thereof proposed in the present invention are based on a common Doppler current meter solution, and an audio interface is added. An external speaker or earphones are used to quickly respond to the signal size, flow velocity and flow direction of the sensor detection area according to the amplitude, frequency and sound channel of the audio. Based on the above-mentioned rapid feedback, the operator can have a clearer understanding of the detected area, avoiding the problem that the observed data and the obtained data cannot correspond, resulting in not knowing where the measurement is and whether it is the optimal point. Based on the above-mentioned rapid response, the operator can quickly establish a concept of the distribution of the measured water flow field according to the sound characteristics of different areas, which is conducive to the scientific selection of measurement points and a clearer understanding of the water conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The circuit schematic diagram of the Doppler flow meter with audio output function of the present invention;

[0035] Figure 2 The figure is a water flow schematic diagram of the operation method of the Doppler current meter with audio output function according to the present invention. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] The embodiment of the present invention provides a Doppler flow meter with an audio output function, such as Figure 1 As shown, the Doppler velocity meter with audio output function includes a transducer group, a transmitting circuit, a controller, a clock and control circuit, an IQ demodulation circuit module and an audio module; wherein the clock control signal output end of the controller is connected to the clock control signal input end of the clock and control circuit; the signal output end of the clock and control circuit is connected to the signal input end of the transmitting circuit; the signal output end of the transmitting circuit is connected to the transmitting signal input end of the transducer group; the received signal of the transducer group is input to the controller through the IQ demodulation circuit module; the audio signal output end of the controller is connected to the signal input end of the audio module. wherein the transducer group can be an antenna for electromagnetic wave transmission and reception, or an ultrasonic transducer for signal transmission and reception.

[0038] Wherein, the controller includes a flow rate calculation module and an audio processing module; wherein the signal input end of the flow rate calculation module and the audio processing module is connected to the signal output end of the IQ demodulation circuit module; wherein the signal input end of the flow rate calculation module and the audio processing module is used to input the I signal and Q signal outputted by the LPF circuit. The IQ demodulation circuit module includes a receiving circuit, an IQ demodulation circuit and an LPF circuit; the LPF circuit is a low pass filter (Low Pass Filter); wherein the receiving circuit is signal-connected to the receiving transducer in the transducer group; the signal output end of the receiving circuit is connected to the signal input end of the IQ demodulation circuit; the signal output end of the IQ demodulation circuit is connected to the signal input end of the LPF circuit; the signal output end of the LPF circuit is connected to the I signal and Q signal input end of the controller. The transducer group includes a transmitting transducer and a receiving transducer; wherein the transmitting transducer is signal-connected to the transmitting circuit; the receiving transducer is signal-connected to the IQ demodulation circuit module. The audio module includes an audio circuit and a speaker; wherein the signal input end of the audio circuit is connected to the audio signal output end of the controller; and the audio signal output end of the audio circuit is connected to the audio signal input end of the speaker. The Doppler flowmeter with audio output function also includes a display; wherein the display control signal input end of the display is connected to the display control signal output end of the controller.

[0039] The working principle of the above technical solution is as follows: first, the area where the flow velocity needs to be measured is determined according to the water flow section, as the target water flow area; then, the Doppler flowmeter is aligned with the area where the flow velocity needs to be measured, and the flow velocity value is displayed by the Doppler flowmeter; finally, the audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain the water flow characteristic audio signal, and amplifies the audio signal through the speaker; wherein, the I signal represents the isotropic component signal; the Q signal represents the orthogonal component signal. Moreover, the water flow characteristic audio signal is actually a comprehensive response to the water flow speed, direction, and reflected signal size.

[0040] Specifically, the Doppler current meter transmits a signal to a target water flow area through a transmitting circuit and a transmitting transducer; the Doppler current meter obtains a signal reflected by the target water flow area through a receiving transducer and a receiving circuit; the signal reflected by the target water flow area is demodulated by an IQ demodulation circuit to obtain an I signal and a Q signal corresponding to the signal reflected by the target water flow area, wherein the I signal represents a co-directional component signal; the Q signal represents an orthogonal component signal; the phase and amplitude between the I signal and the Q signal are analyzed to obtain frequency shift information and angle parameters in the signal reflected by the target water flow area; the water flow velocity is obtained using the frequency shift information and angle parameters in the signal reflected by the target water flow area, and the water flow velocity is displayed.

[0041] At the same time, extract the I signal and Q signal corresponding to the signal reflected in the target water flow area; wherein the I signal represents the in-phase component signal; the Q signal represents the orthogonal component signal; analyze and calibrate the phase and amplitude between the I signal and the Q signal to obtain the calibrated phase data and amplitude data; reconstruct and generate a water flow characteristic audio signal using the phase data and amplitude data; perform audio enhancement processing and audio format conversion on the water flow characteristic audio signal to obtain an audio signal after audio enhancement processing and audio format conversion; amplify and output the audio signal through a speaker.

[0042] The effect of the above technical solution is: a Doppler flowmeter with an audio output function proposed in this embodiment and an audio interface is added on the basis of the ordinary Doppler flowmeter solution, and an external speaker or headphones are used to quickly respond to the signal size, flow velocity and flow direction of the sensor detection area according to the amplitude, frequency and sound channel of the audio; based on the above-mentioned rapid feedback, the operator can have a clearer understanding of the detected area, avoiding the problem that the data seen and obtained cannot correspond, resulting in not knowing where the measurement is and whether it is the optimal point; based on the above-mentioned rapid response, the operator can quickly establish a concept of the distribution of the measured water flow field according to the sound characteristics of different areas, which is conducive to the scientific selection of measurement points and a clearer understanding of the water conditions.

[0043] The embodiment of the present invention provides an operating method of a Doppler flow meter with an audio output function as claimed in claim 1, such as Figure 2 As shown, the operation method includes:

[0044] Step 1: Determine the area where the flow velocity needs to be measured according to the water flow section, as the target water flow area;

[0045] Step 2, aligning the Doppler flowmeter with the area where the flow velocity needs to be measured, and displaying the flow velocity value through the Doppler flowmeter;

[0046] Step 3: The audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker; wherein the I signal represents the isotropic component signal; and the Q signal represents the orthogonal component signal.

[0047] Specifically, the Doppler flowmeter is aligned with an area where flow velocity needs to be measured, and the flow velocity value is displayed by the Doppler flowmeter, including:

[0048] Step 201, the Doppler current meter transmits a signal to a target water flow area through a transmitting circuit and a transmitting transducer;

[0049] Step 202: The Doppler current meter obtains a signal reflected from the target water flow area through a receiving transducer and a receiving circuit;

[0050] Step 203: demodulate the signal reflected by the target water flow area through an IQ demodulation circuit to obtain an I signal and a Q signal corresponding to the signal reflected by the target water flow area, wherein the I signal represents an in-phase component signal; and the Q signal represents an orthogonal component signal;

[0051] Step 204: Analyze the phase and amplitude between the I signal and the Q signal to obtain frequency shift information and angle parameters in the signal reflected from the target water flow area;

[0052] Step 205: Obtain water flow velocity using the frequency shift information and angle parameters in the signal reflected from the target water flow area, and display the water flow velocity.

[0053] Specifically, the audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker, including:

[0054] Step 301, extracting the I signal and Q signal corresponding to the signal reflected by the target water flow area; wherein the I signal represents the in-phase component signal; and the Q signal represents the orthogonal component signal;

[0055] Step 302: Analyze and calibrate the phase and amplitude between the I signal and the Q signal to obtain calibrated phase data and amplitude data;

[0056] Step 303: reconstruct and generate a water flow characteristic audio signal using the phase data and amplitude data;

[0057] Step 304: Perform audio enhancement processing and audio format conversion on the water flow characteristic audio signal to obtain an audio signal after audio enhancement processing and audio format conversion;

[0058] Step 305: amplify the audio signal and output it through a speaker.

[0059] The working principle of the above technical solution is as follows: Figure 2 As shown in the figure, the operator roughly determines the area where the flow velocity needs to be measured based on the river section; Figure 2 , the operator hopes to measure the flow velocity near area B; the operator uses the radar speed meter and roughly aligns it with the area where the speed measurement is required. At this time, the speaker or earphone quickly and real-timely feedbacks the echo signal size, flow velocity size, and flow direction; the operator can roughly judge the detected area based on the real-time feedback of the echo size, flow velocity size, and flow direction, combined with the actual water surface conditions; for example, in area C in the figure, the flow velocity is slow and the sound frequency is low. When it is adjusted to area B, the frequency becomes obviously higher. Then it is adjusted to area D, and it is found that the flow velocity is reversed. Then it is adjusted to area A. At this time, the frequency does not change much, but the loudness is obviously improved. In this way, the operator can roughly judge the detected area and facilitate adjustment; finally, the operator can find the strongest echo signal point near the location to be measured, so that the measured signal-to-noise ratio is better, and the measurement is more accurate and stable.

[0060] At the same time, the Doppler current meter transmits a signal to the target water flow area through the transmitting circuit and the transmitting transducer. The signal is reflected after encountering particles (such as suspended matter, bubbles, etc.) in the water flow in the target water flow area. The reflected signal is captured by the receiving transducer and receiving circuit of the Doppler current meter. The reflected signal is demodulated by the IQ demodulation circuit to obtain the in-phase component signal (I signal) and the orthogonal component signal (Q signal). The phase and amplitude between the I signal and the Q signal are analyzed to obtain the frequency shift information and angle parameters. The water flow velocity is calculated using the frequency shift information and angle parameters and displayed on the Doppler current meter.

[0061] At the same time, the audio processing module of the controller extracts the I signal and Q signal corresponding to the signal reflected in the target water flow area. The phase and amplitude of the I signal and the Q signal are analyzed and calibrated to obtain accurate phase data and amplitude data. The calibrated phase data and amplitude data are used to reconstruct and generate the water flow characteristic audio signal. The water flow characteristic audio signal is subjected to audio enhancement processing and audio format conversion to obtain a high-quality audio signal. The audio signal is amplified and output through the speaker so that people can hear the sound of the water flow.

[0062] The effect of the above technical solution is: the operating method of a Doppler current meter with an audio output function proposed in this embodiment adds an audio interface on the basis of the ordinary Doppler current meter solution, uses an external speaker or connects headphones, and quickly responds to the signal size, flow rate and flow direction of the sensor detection area according to the amplitude, frequency and sound channel of the audio; based on the above-mentioned rapid feedback, the operator can have a clearer understanding of the detected area, avoiding the problem that the data seen and obtained cannot correspond, resulting in not knowing where the measurement is and whether it is the optimal point; based on the above-mentioned rapid response, the operator can quickly establish a concept of the distribution of the measured water flow field according to the sound characteristics of different areas, which is conducive to the scientific selection of measurement points and a clearer understanding of the water conditions.

[0063] At the same time, the flow velocity is measured by the Doppler effect principle, which has high measurement accuracy and stability. The water flow velocity can be displayed in real time, providing reliable data support for water flow monitoring and data analysis. The reconstruction of the audio signal using the I signal and the Q signal can truly restore the water flow characteristics. The clarity and recognizability of the audio signal can be improved through audio enhancement processing and audio format conversion. Combining the Doppler flowmeter and the audio processing module, real-time monitoring and early warning of water flow can be achieved. When the water flow velocity exceeds the preset threshold, the early warning mechanism can be triggered to promptly remind relevant personnel to take countermeasures. This technical solution is suitable for different types of rivers and water environments, and has strong versatility and adaptability. It can provide effective water flow monitoring and data analysis methods for water conservancy, environmental protection, scientific research and other fields.

[0064] In summary, this technical solution achieves accurate measurement of water flow velocity and true restoration of water flow characteristics by combining Doppler flowmeter and audio processing module. At the same time, this technical solution also has the advantages of real-time monitoring and early warning, wide applicability, etc., providing strong technical support for research and application in related fields.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A Doppler flowmeter with audio output function, characterized in that: The Doppler flowmeter with audio output function includes a transducer group, a transmitting circuit, a controller, a clock and control circuit, an IQ demodulation circuit module and an audio module; wherein the clock control signal output end of the controller is connected to the clock control signal input end of the clock and control circuit; the signal output end of the clock and control circuit is connected to the signal input end of the transmitting circuit; the signal output end of the transmitting circuit is connected to the transmitting signal input end of the transducer group; the received signal of the transducer group is input to the controller through the IQ demodulation circuit module; the audio signal output end of the controller is connected to the signal input end of the audio module.

2. The Doppler flowmeter with audio output function according to claim 1, characterized in that: The controller includes a flow rate calculation module and an audio processing module; wherein the signal input ends of the flow rate calculation module and the audio processing module are connected to the signal output end of the IQ demodulation circuit module; wherein the signal input ends of the flow rate calculation module and the audio processing module are used to input the I signal and Q signal output by the LPF circuit.

3. The Doppler flowmeter with audio output function according to claim 1, characterized in that: The IQ demodulation circuit module includes a receiving circuit, an IQ demodulation circuit and an LPF circuit; wherein the receiving circuit is signal-connected to the receiving transducer in the transducer group; the signal output end of the receiving circuit is connected to the signal input end of the IQ demodulation circuit; the signal output end of the IQ demodulation circuit is connected to the signal input end of the LPF circuit; the signal output end of the LPF circuit is connected to the I signal and Q signal input ends of the controller.

4. The Doppler flowmeter with audio output function according to claim 1, characterized in that: The transducer group includes a transmitting transducer and a receiving transducer; wherein the transmitting transducer is signal-connected to the transmitting circuit; and the receiving transducer is signal-connected to the IQ demodulation circuit module.

5. The Doppler flowmeter with audio output function according to claim 1, characterized in that: The audio module includes an audio circuit and a speaker; wherein the signal input end of the audio circuit is connected to the audio signal output end of the controller; and the audio signal output end of the audio circuit is connected to the audio signal input end of the speaker.

6. The Doppler flow meter with audio output function according to claim 1, characterized in that: The Doppler flowmeter with audio output function also includes a display; wherein the display control signal input end of the display is connected to the display control signal output end of the controller.

7. A method for operating the Doppler flowmeter with audio output function as claimed in claim 1, characterized in that: The operation method comprises: Determine the area where the flow velocity needs to be measured based on the water flow cross section as the target water flow area; Aim the Doppler flowmeter at the area where the flow velocity needs to be measured, and display the flow velocity value through the Doppler flowmeter; The audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker; wherein the I signal represents an isotropic component signal; and the Q signal represents an orthogonal component signal.

8. The method for operating the Doppler flowmeter with audio output function according to claim 7, characterized in that: Aim the Doppler flowmeter at the area where the flow velocity needs to be measured, and display the flow velocity value through the Doppler flowmeter, including: The Doppler current meter transmits a signal to the target water flow area through a transmitting circuit and a transmitting transducer; The Doppler current meter obtains the signal reflected by the target water flow area through a receiving transducer and a receiving circuit; The signal reflected by the target water flow area is demodulated by an IQ demodulation circuit to obtain an I signal and a Q signal corresponding to the signal reflected by the target water flow area, wherein the I signal represents an in-phase component signal; and the Q signal represents an orthogonal component signal; Analyze the phase and amplitude between the I signal and the Q signal to obtain frequency shift information and angle parameters in the signal reflected from the target water flow area; The water flow velocity is obtained by using the frequency shift information and angle parameters in the signal reflected by the target water flow area, and the water flow velocity is displayed.

9. The method for operating the Doppler flowmeter with audio output function according to claim 7, characterized in that: The audio processing module of the controller processes the I signal and Q signal output by the IQ demodulation circuit to obtain a water flow characteristic audio signal, and amplifies the audio signal through a speaker, including: Extracting the I signal and Q signal corresponding to the signal reflected in the target water flow area; wherein the I signal represents the in-phase component signal; and the Q signal represents the orthogonal component signal; Analyzing and calibrating the phase and amplitude between the I signal and the Q signal to obtain calibrated phase data and amplitude data; Reconstruct and generate a water flow characteristic audio signal using the phase data and amplitude data; Performing audio enhancement processing and audio format conversion on the water flow characteristic audio signal to obtain an audio signal after the audio enhancement processing and audio format conversion; The audio signal is amplified and output through the speaker.

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