CN210690621U - Multi-dimensional ultrasonic Doppler current meter - Google Patents
Multi-dimensional ultrasonic Doppler current meter Download PDFInfo
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- CN210690621U CN210690621U CN201921464164.4U CN201921464164U CN210690621U CN 210690621 U CN210690621 U CN 210690621U CN 201921464164 U CN201921464164 U CN 201921464164U CN 210690621 U CN210690621 U CN 210690621U
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Abstract
The utility model relates to a multidimension degree ultrasonic wave Doppler current meter, detecting head including control terminal and connection control terminal, be equipped with a circuit board on the detecting head and with a signalling transducer, the signal reception transducer more than two that the circuit board is connected, the signalling transducer is located on the center axis of the circle at signal reception transducer place, and the direction of receipt of each signalling transducer is theta with the contained angle of the direction of transmission of signalling transducer, and this contained angle theta is less than 90. Compare in current ultrasonic wave Doppler current meter, the utility model discloses can measure the velocity of flow in to the cubical space through the probe, improve velocity of flow measurement's accuracy and reliability greatly, also can work at the external environment of the low velocity of flow better, improve the measurement accuracy under the low velocity of flow environment.
Description
Technical Field
The utility model relates to a hydrological instrument field especially relates to a multidimension degree ultrasonic wave Doppler current meter.
Background
At present, the rotor current meter and then the ultrasonic Doppler current meter are not basically used for hydrological measurement in China. The ultrasonic Doppler current meter can measure at very low flow velocity, the accuracy is high, and the measured data can be obtained by direct synthesis without additional manual calculation, so that the efficiency of daily monitoring is improved. In addition, the defect that the rotor flow meter is afraid of floating objects (such as waterweeds, waste ropes and the like) in water can be overcome.
However, because the natural environment is strange, most of the existing ultrasonic doppler velocimeters are suspended by cables for measurement when in use, and under the condition of low flow rate, the ultrasonic doppler velocimeter is difficult to ensure to align the direction of water flow, so that the deviation of measured data is caused, the reliability is greatly problematic, and the monitoring in the aspect of hydrology and water conservancy is not facilitated.
In view of this, the present inventors have made extensive conception in view of many defects and inconveniences caused by the perfection of the design of the ultrasonic doppler velocimeter, and have actively studied, improved and tried on to develop and design the present invention.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multidimension degree ultrasonic wave doppler current meter that the accuracy is high.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a multidimension degree ultrasonic wave Doppler current meter, includes control terminal and connection control terminal's detecting head, be equipped with a circuit board and a signal transmission transducer, the signal reception transducer more than two that are connected with the circuit board on the detecting head, the signal transmission transducer is located on the central axis of the circle at signal reception transducer place, and the contained angle of the direction of receipt of each signal reception transducer and the direction of transmission of signal transmission transducer is theta, and this contained angle theta is less than 90 deg.
The probe comprises a shell, wherein the shell consists of a shell body and a plurality of mounting shafts which are uniformly connected to the periphery of the shell body, and the number of the mounting shafts is the same as that of the signal receiving transducers; the included angle formed by each mounting shaft and the shell body is the same and less than 90 degrees; the signal transmitting transducer is installed at the lower end of the shell body, and the signal receiving transducer is installed at the end of each installation shaft.
The axis of the shell body is perpendicular to a plane formed by the mounting shaft and the connecting end of the shell body.
And the probe is also provided with a temperature sensor connected with the circuit board.
The circuit board is provided with a power amplifier connected with the signal transmitting transducer, a DDS signal generator connected with the power amplifier, a pre-amplification unit connected with the signal receiving transducer and a multi-way switch connected with the pre-amplification unit.
The circuit board is also provided with a CPU connected with the temperature sensor and the DDS signal generator, an automatic gain control unit connected with the multi-way switch, a difference frequency signal unit connected with the automatic gain unit and the DDS signal generator, and a signal conversion unit connected with the difference frequency signal unit and the CPU. The probe is connected with the control terminal in a wired or wireless mode.
After the technical scheme is adopted, the utility model discloses a set up a signal transmission transducer and a plurality of signal reception transducer on the detecting head to form the mode of one-shot many receipts of detecting head, realize three-dimensional measurement. When the signal transmitting transducer transmits ultrasonic signals, the signal receiving transducers receive the ultrasonic signals in different directions, and the received analog signals in all directions are subjected to signal transformation and vector synthesis calculation, so that the multi-dimensional space water velocity can be obtained. Compare in current ultrasonic wave Doppler current meter, the utility model discloses can measure the velocity of flow in to the cubical space through the probe, the probe need not to aim at the rivers direction, has improved velocity of flow measurement's accuracy and reliability greatly, also can work at the external environment of the low velocity of flow better, has improved the measurement accuracy under the low velocity of flow environment.
Drawings
Fig. 1 is a structural diagram of an embodiment of the multi-dimensional ultrasonic doppler velocimeter of the present invention;
FIG. 2 is a schematic structural diagram of a probe of the present invention;
FIG. 3 is a bottom view of the probe of the present invention;
FIG. 4 is a cross-sectional view of a probe of the present invention;
FIG. 5 is a schematic block diagram of the present invention;
fig. 6 is a structural diagram of another embodiment of the multi-dimensional ultrasonic doppler flow velocity meter of the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a multidimension degree ultrasonic wave doppler current meter, it includes control terminal 2, detecting head 1 and cable 3, and control terminal 2 is used for controlling detecting head 1 to survey work, and this control terminal 2 passes through cable 3 with detecting head 1 and is connected.
As shown in fig. 2 to 4, the probe 1 includes a housing 11, and a temperature sensor 13, a signal transmitting transducer 14, a signal receiving transducer 15, and a circuit board 16 mounted on the housing 11. The housing 11 includes a housing body 111 and three mounting shafts 112 uniformly arranged on the periphery of the housing body 111, that is, the horizontal included angles between the three mounting shafts are 120 °. The included angle formed by the three mounting shafts 112 and the shell body 111 is the same and less than 90 degrees, and the plane formed by the connecting ends of the three mounting shafts 112 and the shell body 111 is perpendicular to the axis of the shell body 111, so that the signal transmitting transducer 14 is positioned on the central axis of the circle where the three signal receiving transducers 15 are positioned. A circuit board 16 is installed in the case body 111, and a temperature sensor 13 is installed at the outer circumference of the case body 11, and the temperature sensor 13 is connected to the circuit board 16 so as to transmit water temperature information to the circuit board 16. The upper end of the shell body 111 is a cable interface, and the cable 3 is hermetically penetrated and arranged at the upper end; and the lower end of the shell body 111 is provided with a signal transmitting transducer 14, and the signal transmitting transducer 14 is connected with the circuit board 16, so that the circuit board 16 controls the signal transmitting transducer 14 to transmit ultrasonic signals. The end of each mounting shaft 112 is mounted with a signal receiving transducer 15, the angle between the receiving direction of the signal receiving transducer 15 and the transmitting direction of the signal transmitting transducer 14 being theta, which is smaller than 90 deg.. The three mounting shafts are of the same length and the angle theta described above can be varied in design according to the actual requirements of the measurement.
As shown in fig. 5, the circuit board 16 is provided with a CPU161, a DDS signal generator 162, a power amplifier 163, a signal conversion unit 168, a difference frequency signal unit 167, an automatic gain control unit 166, a multiplexer 165, and three pre-amplification units 164. The CPU161 is connected to the temperature sensor 13 to receive external temperature data to provide temperature compensation of the flow rate; the CPU161 is also connected to a DDS signal generator 162, thereby driving the DDS signal generator 162 to generate a DDS signal. The DDS signal generator 162 is connected to the signal transmitting transducer 14 through the power amplifier 163, so as to amplify the DDS signal and supply the amplified DDS signal to the signal transmitting transducer 14, and the signal transmitting transducer 14 emits the ultrasonic signal. The three signal receiving transducers 15 are respectively connected to the multi-way switch 165 through a pre-amplifying unit 164, the three receiving transducers 15 receive the sound waves reflected from each direction and transmit the sound waves to the pre-amplifying unit 164 for filtering and amplifying, and the amplified signals are selected by the multi-way switch 165 and then transmitted to the automatic gain control unit 166. During each measurement, the multi-way switch 165 can sequentially turn on one of the switches and turn off the other two switches for data transmission, so that the system is more power-saving and durable. The automatic gain circuit 166 adjusts the received signals and re-strengthens or attenuates the signals with inconsistent intensity to make the waveform smoother; and transmits the processed waveform to the difference frequency signal unit 167 to perform difference frequency processing with the waveform of the DDS signal, so as to obtain a doppler shift signal. The doppler shift signal is transmitted to the signal conversion unit 168 to be shaped into a square wave signal, and is transmitted to the CPU161 for calculation.
The DDS signal generator 161, the power amplifier 162 and the signal transmitting transducer 14 in the circuit board 16 cooperate to form a signal transmitting module, the three-signal receiving transducer 15 cooperates with the pre-amplifying unit 164 and the multi-way switch 165 of the circuit board 16 to form a signal receiving module, and the automatic gain unit 166, the difference frequency signal unit 167 and the signal transforming unit 167 cooperate to form a signal processing module. The CPU161 and the signal processing module may be disposed on the circuit board 16 of the probe 1, or may be disposed on the control terminal 2, that is, the control terminal 2 may be responsible for signal processing, calculation, display, storage, data output, and receiving remote control instructions, in addition to the setting and control of the whole system.
When the flow velocity is measured, a control signal is transmitted to the probe head 1 through the control terminal 2, the control signal is sent to the CPU161 to drive the signal transmitting transducer 14 in the signal transmitting module to transmit an ultrasonic signal, the three signal receiving transducers 15 in the signal receiving module receive in three different directions in a polling working mode, and the signal processing module performs signal conversion on the received analog signals in all directions to complete a period from transmitting to receiving. The CPU161 performs vector synthesis calculation on the converted signals obtained in this period to obtain a spatial water velocity, that is, a multi-dimensional water velocity.
As shown in fig. 6, the control terminal 2 and the probe head 1 may be connected by wireless signals. Specifically, a wireless communication unit may be provided on the circuit board 16 of the probe head 1, and the wireless communication unit may be used instead of the cable 3 for data transmission and control.
The present embodiment realizes the three-dimensional measurement by arranging a signal transmitting transducer 14 and three signal receiving transducers 15 on the probe head 1, thereby forming a one-shot and multi-shot structure of the probe head 1. When the signal transmitting transducer 14 transmits ultrasonic signals, the three signal receiving transducers 15 receive the ultrasonic signals in three different directions, and the received analog signals in all directions are subjected to signal transformation and vector synthesis calculation, so that the multi-dimensional space water velocity can be obtained. Compare in current ultrasonic wave Doppler current meter, the utility model discloses can measure through the velocity of flow of detecting head 1 in to the cubical space, need not to aim at the rivers direction, improve velocity of flow measurement's accuracy and reliability greatly, also can work at the external environment of the low velocity of flow better, improve the measurement accuracy under the low velocity of flow environment.
The number of the signal receiving transducers 15 may also be two or more than four, and when two or more than four are provided, the number of the signal receiving transducers 15 is different from that of the flow velocity meter provided with three signal receiving transducers 15, and the structure and the principle are the same, and thus, the description is omitted here.
The above description is only an embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a multidimension degree ultrasonic wave Doppler current meter, includes control terminal and connection control terminal's detecting head, its characterized in that: the probe is provided with a circuit board, a signal transmitting transducer and more than two signal receiving transducers, wherein the signal transmitting transducer and the signal receiving transducers are connected with the circuit board, the signal transmitting transducer is positioned on the central axis of a circle where the signal receiving transducers are positioned, the included angle between the transmitting direction of each signal receiving transducer and the receiving direction of each signal transmitting transducer is theta, and the included angle theta is smaller than 90 degrees.
2. The multi-dimensional ultrasonic doppler velocimeter of claim 1, wherein: the probe comprises a shell, wherein the shell consists of a shell body and a plurality of mounting shafts which are uniformly connected to the periphery of the shell body, and the number of the mounting shafts is the same as that of the signal receiving transducers; the included angle formed by each mounting shaft and the shell body is the same and less than 90 degrees; the shell body lower extreme is installed the signal transmission transducer, and the tip of each installation axle is installed the signal reception transducer.
3. The multi-dimensional ultrasonic doppler velocimeter of claim 2, wherein: the axis of the shell body is perpendicular to a plane formed by the mounting shaft and the connecting end of the shell body.
4. The multi-dimensional ultrasonic doppler velocimeter of claim 1, wherein: and the probe is also provided with a temperature sensor connected with the circuit board.
5. The multi-dimensional ultrasonic doppler velocimeter of any one of claims 1 to 4, wherein: the circuit board is provided with a power amplifier connected with the signal transmitting transducer, a DDS signal generator connected with the power amplifier, a pre-amplification unit connected with the signal receiving transducer and a multi-way switch connected with the pre-amplification unit.
6. The multi-dimensional ultrasonic doppler velocimeter of claim 5, wherein: the circuit board is also provided with a CPU connected with the temperature sensor and the DDS signal generator, an automatic gain control unit connected with the multi-way switch, a difference frequency signal unit connected with the automatic gain unit and the DDS signal generator, and a signal conversion unit connected with the difference frequency signal unit and the CPU.
7. The multi-dimensional ultrasonic doppler velocimeter of any one of claims 1 to 4, wherein: the probe is connected with the control terminal in a wired or wireless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464164.4U CN210690621U (en) | 2019-09-04 | 2019-09-04 | Multi-dimensional ultrasonic Doppler current meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464164.4U CN210690621U (en) | 2019-09-04 | 2019-09-04 | Multi-dimensional ultrasonic Doppler current meter |
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| CN210690621U true CN210690621U (en) | 2020-06-05 |
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| CN201921464164.4U Active CN210690621U (en) | 2019-09-04 | 2019-09-04 | Multi-dimensional ultrasonic Doppler current meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092815A (en) * | 2021-04-06 | 2021-07-09 | 武汉上善绎科技有限公司 | Ultrasonic method for measuring three-dimensional speed of water flow in real time |
| CN114563593A (en) * | 2022-02-21 | 2022-05-31 | 武汉新烽光电股份有限公司 | Doppler ultrasonic current meter |
-
2019
- 2019-09-04 CN CN201921464164.4U patent/CN210690621U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092815A (en) * | 2021-04-06 | 2021-07-09 | 武汉上善绎科技有限公司 | Ultrasonic method for measuring three-dimensional speed of water flow in real time |
| CN113092815B (en) * | 2021-04-06 | 2024-02-23 | 武汉上善绎科技有限公司 | Ultrasonic method for measuring three-dimensional speed of water flow in real time |
| CN114563593A (en) * | 2022-02-21 | 2022-05-31 | 武汉新烽光电股份有限公司 | Doppler ultrasonic current meter |
| CN114563593B (en) * | 2022-02-21 | 2022-11-29 | 武汉新烽光电股份有限公司 | Doppler ultrasonic current meter |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Multidimensional Ultrasonic Doppler Velocimeter Granted publication date: 20200605 Pledgee: Agricultural Bank of China Limited Xiamen Siming Sub branch Pledgor: Xiamen boyida Technology Co.,Ltd. Registration number: Y2024980010283 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |