CN210514359U - Sensing detection circuit based on ultrasonic measurement wind speed and wind direction - Google Patents
Sensing detection circuit based on ultrasonic measurement wind speed and wind direction Download PDFInfo
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- CN210514359U CN210514359U CN201921323305.0U CN201921323305U CN210514359U CN 210514359 U CN210514359 U CN 210514359U CN 201921323305 U CN201921323305 U CN 201921323305U CN 210514359 U CN210514359 U CN 210514359U
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Abstract
The utility model relates to a sensing detection circuit based on wind speed and direction are measured to ultrasonic wave, including power supply circuit, ultrasonic drive circuit, ultrasonic transducer subassembly, filter shaping circuit and main control circuit, power supply circuit respectively with ultrasonic drive circuit, filter shaping circuit and main control circuit electricity are connected, the ultrasonic transducer subassembly with the ultrasonic drive circuit electricity is connected, ultrasonic drive circuit with the filter shaping circuit electricity is connected, filter shaping circuit with the main control circuit electricity is connected. The utility model discloses a sensing detection circuit based on ultrasonic measurement wind speed wind direction, through power supply circuit can provide stable power, through main control circuit drive ultrasonic probe subassembly transmission ultrasonic signal to carry out the shaping by ultrasonic signal that ultrasonic probe subassembly received and confirm wind speed and wind direction by main control circuit after filtering, the monitoring accuracy is high, can not influence the monitoring result along with the structure is ageing.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a sensing detection circuit based on ultrasonic measurement wind speed and direction.
Background
Wind energy is an inexhaustible novel energy source, and is closely related to the aspects of daily life, industrial production and the like of human beings. Besides being an important renewable resource, wind energy also has a great influence on the living environment. For example, travel traffic, production labor and the like, when the wind speed is too high, the driving safety is seriously affected, and even some natural disasters are caused. It follows that wind measurement is of great importance in order to be more efficient and rational in terms of wind energy to benefit mankind.
Traditional mechanical anemoscope mainly relies on the speed and the angle of rotatable parts and then judges out wind speed and wind direction, and its shortcoming is along with the increase of time, and the friction of rotatable parts causes reasons such as ageing, causes the damage of spare part easily to influence the accuracy of measurement.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, a sensing detection circuit based on ultrasonic measurement wind speed wind direction is provided.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a sensing detection circuit based on ultrasonic measurement wind speed and direction, includes power supply circuit, ultrasonic drive circuit, ultrasonic probe subassembly, filtering shaping circuit and main control circuit, power supply circuit respectively with ultrasonic drive circuit, filtering shaping circuit and main control circuit electricity are connected, the ultrasonic probe subassembly with the ultrasonic drive circuit electricity is connected, the ultrasonic drive circuit with the filtering shaping circuit electricity is connected, filtering shaping circuit with main control circuit electricity is connected.
The utility model has the advantages that: the utility model discloses a sensing detection circuit based on ultrasonic measurement wind speed wind direction, through power supply circuit can provide stable power, through main control circuit drive ultrasonic probe subassembly transmission ultrasonic signal to carry out the shaping by ultrasonic signal that ultrasonic probe subassembly received and confirm wind speed and wind direction by main control circuit after filtering, the monitoring accuracy is high, can not influence the monitoring result along with the structure is ageing.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the power supply circuit comprises a diode D1, a bidirectional transient suppression diode D14, a capacitor C40, a capacitor C33, a switching regulator U2, a capacitor C41, a capacitor C42, a capacitor C12, a capacitor C13 and a resistor R11, the bidirectional transient suppression diode D14 is electrically connected between an external power supply and the ground, the external power supply is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the input end of the switching regulator U2, the capacitor C40 and the capacitor C33 are connected between the input end of the switching regulator U2 and the ground in parallel, the grounding end of the switching regulator U2 is grounded, the capacitor C41 and the capacitor C42 are connected between the output end of the switching regulator U2 and the ground in parallel, the resistor R11 and the capacitor C12 are sequentially connected between the output end of the switching regulator U2 and the ground in series, the capacitor C13 is connected with the capacitor C12 in parallel, and the common end of the resistor R11 and the capacitor C12 are electrically connected with the circuit, and the output end of the switching regulator U2 is electrically connected with the ultrasonic drive circuit and the filter shaping circuit respectively.
The beneficial effects of the further scheme are as follows: the power supply circuit can provide stable power supply for the main control circuit, the ultrasonic drive circuit and the filter shaping circuit, and can prevent the power supply from being reversely plugged and burning out a post-stage circuit
Further: the ultrasonic drive circuit adopts a multi-channel analog switch chip U1 with the model number of SGM 4782.
The beneficial effects of the further scheme are as follows: the driving capability can be enhanced through the ultrasonic drive circuit, and the defect that the driving capability of a data transmission port of the main control circuit is insufficient is prevented.
Further: the filter shaping circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R15, a resistor R16, a resistor R17, a resistor R39, a capacitor C25, a capacitor C26, a capacitor C36, a capacitor C39 and an operational amplifier U3, wherein the resistor R4 and the resistor R5 are sequentially connected in series between a second output end of the power supply circuit and the ground, a common end of the resistor R4 and the resistor R5 is respectively and electrically connected with a primary operational amplifier non-inverting input end and a secondary operational amplifier non-inverting input end of the operational amplifier U3, the capacitor C26 and the resistor R5 are connected in parallel, the capacitor C39 and the resistor R17 are sequentially connected in series between an output end of the ultrasonic drive circuit and a primary operational amplifier inverting input end of the operational amplifier U3, the resistor R6 is electrically connected between a primary operational amplifier inverting input end and an output end of the operational amplifier U3, a primary operational amplifier positive power supply input end of the operational amplifier U5 3 is grounded, the negative power supply input end that operational amplifier U3's one-level operation was put passes through electric capacity C36 ground connection, just the negative power supply input end that operational amplifier U3's one-level operation was put with power supply circuit's second output electricity is connected, it has in order to establish ties between operational amplifier U3's one-level operation's the output and the reverse input end that second level operation was put electric capacity C25 and resistance R16, electric connection has between the common terminal of electric capacity C25 and resistance R16 and the output of operational amplifier U3's second level operation is put between the output electric connection have resistance R15, operational amplifier U3's second level operation is put, and electric connection has between reverse input and the output resistance R39, the output of operational amplifier U3's second level operation is put the input electricity of main control circuit is connected.
The beneficial effects of the further scheme are as follows: the voltage is divided by the resistor R4 and the resistor R5 and is respectively used as reference voltage of the two-stage operational amplifier, a signal received from the ultrasonic drive circuit and the reverse input end of the first operational amplifier are amplified, the second-stage operational amplifier carries out first-order shaping filtering, and a stable signal is obtained and output to the main control circuit for operation processing.
Further: the main control circuit adopts a single chip microcomputer with the model number of STM32F407VGT 6.
Further: the ultrasonic probe assembly comprises at least two pairs of receiving and transmitting integrated ultrasonic sensors which are arranged in an orthogonal mode, and the ultrasonic sensors are electrically connected with the ultrasonic drive circuit.
The beneficial effects of the further scheme are as follows: through two pairs of mutually orthogonal receiving and transmitting integrated ultrasonic sensors, 180 degrees are formed by every two pairs of ultrasonic sensors, the distance between each pair of ultrasonic sensors is equal, and the ultrasonic sensors are arranged on a unified horizontal line, so that the measuring signals of the wind speed and the wind direction of the lane can be accurately measured.
Further: the ultrasonic probe assembly further comprises a temperature and humidity sensor, and the temperature and humidity sensor is electrically connected with the ultrasonic drive circuit.
The beneficial effects of the further scheme are as follows: the temperature and humidity sensor can collect temperature and humidity signals in real time, and after shaping and filtering processing, the main control circuit determines the actual temperature and humidity value, so that the temperature in the environment can be conveniently detected in real time.
Further: the ultrasonic probe assembly further comprises an air pressure sensor, and the air pressure sensor is electrically connected with the ultrasonic driving circuit.
The beneficial effects of the further scheme are as follows: the air pressure sensor can collect air pressure signals in real time, and after shaping and filtering processing, the main control circuit determines an actual air pressure value, so that the air pressure in the environment can be detected conveniently in real time.
Further: the sensing detection circuit for measuring the wind speed and the wind direction based on the ultrasonic waves further comprises a communication circuit, the communication circuit is electrically connected with the main control circuit, and the power circuit is electrically connected with the communication circuit.
The beneficial effects of the further scheme are as follows: the detection values such as wind speed and wind direction obtained through calculation can be output to an external terminal through the communication circuit, and therefore remote monitoring is achieved.
Drawings
Fig. 1 is a schematic structural view of a sensing detection circuit for measuring wind speed and wind direction based on ultrasonic waves according to the present invention;
fig. 2 is a circuit diagram of a power supply circuit of the present invention;
fig. 3 is a circuit diagram of an ultrasonic drive circuit according to the present invention;
fig. 4 is a circuit diagram of the filter shaping circuit of the present invention;
FIG. 5 is a circuit diagram of the main control unit of the present invention;
fig. 6 is a circuit diagram of the communication circuit of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a sensing detection circuit for measuring wind speed and wind direction based on ultrasonic waves comprises a power supply circuit, an ultrasonic drive circuit, an ultrasonic probe assembly, a filter shaping circuit and a main control circuit, wherein the power supply circuit is respectively electrically connected with the ultrasonic drive circuit, the filter shaping circuit and the main control circuit, the main control circuit is electrically connected with the ultrasonic probe assembly, the ultrasonic probe assembly is electrically connected with the ultrasonic drive circuit, the ultrasonic drive circuit is electrically connected with the filter shaping circuit, and the filter shaping circuit is electrically connected with the main control circuit.
The utility model discloses a sensing detection circuit based on ultrasonic measurement wind speed wind direction, through power supply circuit can provide stable power, through main control circuit drive ultrasonic probe subassembly transmission ultrasonic signal to carry out the shaping by ultrasonic signal that ultrasonic probe subassembly received and confirm wind speed and wind direction by main control circuit after filtering, the monitoring accuracy is high, can not influence the monitoring result along with the structure is ageing.
As shown in fig. 2, in one or more embodiments of the present invention, the power circuit includes a diode D1, a bidirectional transient suppression diode D14, a capacitor C40, a capacitor C33, a switching regulator U2, a capacitor C41, a capacitor C42, a capacitor C12, a capacitor C13 and a resistor R11, the bidirectional transient suppression diode D14 is electrically connected between an external power source and the ground, the external power source is electrically connected to the anode of the diode D1, the cathode of the diode D1 is electrically connected to the input of the switching regulator U2, the capacitor C40 and the capacitor C33 are connected in parallel between the input of the switching regulator U2 and the ground, the ground of the switching regulator U2 is grounded, the capacitor C41 and the capacitor C42 are connected in parallel between the output of the switching regulator U2 and the ground, the resistor R11 and the capacitor C12 are sequentially connected in series between the output of the switching regulator U2 and the ground, the capacitor C13 is connected in parallel with the capacitor C12, the common end of the resistor R11 and the capacitor C12 is electrically connected with the main control circuit, and the output end of the switching regulator U2 is respectively electrically connected with the ultrasonic drive circuit and the filter shaping circuit. The power supply circuit can provide stable power supply for the main control circuit, the ultrasonic drive circuit and the filter shaping circuit, and can prevent the power supply from being reversely plugged to burn out a rear-stage circuit. Here, the switching regulator U2 adopts a power chip of model number TPS70933, and its characteristics are: the quiescent current is 1 uA; and (3) low pressure reduction: 245mV at 50 mA; the protection circuit has the functions of thermal cut-off, current limitation and reverse current protection; the DC-DC power supply module circuit provides driving voltage for each module circuit.
In one or more embodiments provided by the present invention, the ultrasonic driving circuit employs a multi-way analog switch chip U1 with model number SGM 4782. The driving capability of the ultrasonic driving circuit can be enhanced, and the defect of insufficient driving capability of the data transmission port of the main control circuit is prevented, and the circuit diagram is shown in fig. 3.
As shown in fig. 4, in one or more embodiments provided in the present invention, the filter shaping circuit includes a resistor R4, a resistor R5, a resistor R6, a resistor R15, a resistor R16, a resistor R17, a resistor R39, a capacitor C25, a capacitor C26, a capacitor C36, a capacitor C39, and an operational amplifier U3, the resistor R4 and the resistor R5 are sequentially connected in series between the second output terminal of the power circuit and the ground, a common terminal of the resistor R4 and the resistor R5 is respectively electrically connected to a first-stage operational amplifier non-inverting input terminal and a second-stage operational amplifier non-inverting input terminal of the operational amplifier U3, the capacitor C26 is connected in parallel to the resistor R5, the capacitor C39 and the resistor R17 are sequentially connected in series between the output terminal of the ultrasonic driving circuit and the first-stage operational amplifier inverting input terminal of the operational amplifier U3, the resistor R6 is electrically connected between the first-stage operational amplifier inverting input terminal and the output terminal of the operational amplifier U3, the positive power supply input end of the first-stage operational amplifier of the operational amplifier U3 is grounded, the negative power supply input end of the first-stage operational amplifier of the operational amplifier U3 is grounded through the capacitor C36, the negative power supply input end of the first-stage operational amplifier of the operational amplifier U3 is electrically connected with the second output end of the power supply circuit, the capacitor C25 and the resistor R16 are sequentially connected in series between the output end of the first-stage operational amplifier of the operational amplifier U3 and the reverse input end of the second-stage operational amplifier, the resistor R15 is electrically connected between the common end of the capacitor C25 and the resistor R16 and the output end of the second-stage operational amplifier of the operational amplifier U3, the main control input end and the output end of the second-stage operational amplifier of the operational amplifier U3 are electrically connected with the resistor R39, and the output end of the second-stage operational amplifier U3 is electrically connected with the. The voltage is divided by the resistor R4 and the resistor R5 and is respectively used as reference voltage of the two-stage operational amplifier, a signal received from the ultrasonic drive circuit and the reverse input end of the first operational amplifier are amplified, the second-stage operational amplifier carries out first-order shaping filtering, and a stable signal is obtained and output to the main control circuit for operation processing. Here, the operational amplifier U3 employs a TSV632 aidsslashdt rail-to-rail operational amplifier.
In the utility model, the resistor R4 and the resistor R5 divide the voltage by 3.3V to obtain 2.5V voltage which is respectively connected with the same-phase input of the two-stage operational amplifier and used as the reference voltage for receiving the waveform; the signal output by the ultrasonic drive circuit is connected to the inverting input end of the first-stage operational amplifier, and the intermediate capacitor R39 plays a role in blocking direct current and circulating alternating current; then the effect of the resistor R17 and the resistor R6 is reduced by about 20 times; the next-stage operational amplifier circuit is an amplifying circuit which amplifies about 30 times if welding R39 and the empty paste R15 are selected, and is a first-order filter circuit if the empty paste R39 and the welding R15 are selected, so that the next-stage operational amplifier circuit can be flexibly processed according to the actual calibration condition; finally, a stable signal FrEAD is obtained and is output to the main control circuit for operation processing.
Preferably, in one or more embodiments provided by the present invention, the main control circuit adopts a single chip microcomputer with a model of STM32F407VGT6, and a process of processing signals thereof is as follows: main control circuit produces the square wave signal that 40KHz duty cycle is 50%, and a set of ultrasonic sensor of drive sends out super emission waveform, and the signal waveform that subtend ultrasonic sensor received exports for main control circuit after filter shaping circuit handles, and main control circuit calculates the numerical value of air speed and wind direction through comparing the time difference of transmission and receipt waveform, and specific processing procedure is prior art, the utility model discloses in no longer detailed repeated, and this is not the utility model discloses in the required protection range, main control circuit's circuit connection schematic diagram is shown in fig. 5.
The utility model provides a in one or more embodiments, ultrasonic probe subassembly includes the receiving and dispatching integral type ultrasonic sensor of at least two pairs of mutual orthogonality settings, ultrasonic sensor with ultrasonic drive circuit electricity is connected. Through two pairs of receiving and dispatching integral type ultrasonic sensor that mutual quadrature set up, two liang of formation 180, every is equal to distance between the ultrasonic sensor to install on same horizontal plane, according to clockwise order, adjacent ultrasonic transducer carries out ultrasonic wave's receiving and dispatching in proper order, can accurately survey the measuring signal of wind speed wind direction. The utility model discloses in, two pairs of receiving and dispatching integral type ultrasonic sensor distribute in four positions of east south west north and east, measure the ultrasonic wave and once receive to adjacent position (for example east position) ultrasonic sensor through the reflection of sensor top cap from a position (for example north position), measure transmission time to compare with the ultrasonic sensor transmission time of the ultrasonic sensor in a position and adjacent position. Similarly, the wind speed and direction of the wind can be calculated by comparing the transit time of the ultrasonic wave from one azimuth (e.g., east) ultrasonic sensor to the transit time of the ultrasonic wave from the adjacent azimuth (e.g., south), and calculating the difference in transit time between the two points, and this calculation method is independent of other factors such as temperature.
The utility model provides a in one or more embodiments, the ultrasonic probe subassembly still includes temperature and humidity sensor, temperature and humidity sensor with the ultrasonic drive circuit electricity is connected. The temperature and humidity sensor can collect temperature and humidity signals in real time, and after shaping and filtering processing, the main control circuit determines the actual temperature and humidity value, so that the temperature in the environment can be conveniently detected in real time. Here, the temperature and humidity sensor may be an existing temperature and humidity sensing chip, which is not listed in detail here.
In one or more embodiments of the present invention, the ultrasonic probe assembly further includes an air pressure sensor, and the air pressure sensor is electrically connected to the ultrasonic driving circuit. The air pressure sensor can collect air pressure signals in real time, and after shaping and filtering processing, the main control circuit determines an actual air pressure value, so that the air pressure in the environment can be detected conveniently in real time. Here, the air pressure sensor may be an existing air pressure sensing chip, and is not described in detail here.
The utility model provides a in one or more embodiments, sensing detection circuit based on ultrasonic measurement wind speed and direction still include communication circuit, communication circuit with main control circuit electricity is connected, power supply circuit with communication circuit electricity is connected. The detection values such as wind speed and wind direction obtained through calculation can be output to an external terminal through the communication circuit, and therefore remote monitoring is achieved. Fig. 6 shows a circuit diagram of the communication circuit of the present invention, wherein the communication chip U11 adopts a 485 serial port communication chip with model number SP3485, and its peripheral circuit is shown in the figure and is an existing circuit, which is not described in detail here.
The utility model discloses a based on ultrasonic wave wind speed wind direction sensing detection circuitry, it comes accurate measurement wind speed, wind direction based on ultrasonic sensor and integrated circuit technique, has solved the problem that traditional mechanical type anemoscope exists. The measurement range of the wind speed can be reduced to zero theoretically based on the ultrasonic sensing detection circuit, the wind speed does not need to be started, and the method is simple and easy to operate. Based on ultrasonic sensing detection circuitry not only simple structure, sturdy and durable and measurement accuracy is high.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides a sensing detection circuit based on wind speed and direction is measured to ultrasonic wave which characterized in that: the ultrasonic wave power supply comprises a power supply circuit, an ultrasonic wave driving circuit, an ultrasonic wave probe assembly, a filter shaping circuit and a main control circuit, wherein the power supply circuit is respectively electrically connected with the ultrasonic wave driving circuit, the filter shaping circuit and the main control circuit, the main control circuit is electrically connected with the ultrasonic wave probe assembly, the ultrasonic wave probe assembly is electrically connected with the ultrasonic wave driving circuit, the ultrasonic wave driving circuit is electrically connected with the filter shaping circuit, and the filter shaping circuit is electrically connected with the main control circuit.
2. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the power supply circuit comprises a diode D1, a bidirectional transient suppression diode D14, a capacitor C40, a capacitor C33, a switching regulator U2, a capacitor C41, a capacitor C42, a capacitor C12, a capacitor C13 and a resistor R11, the bidirectional transient suppression diode D14 is electrically connected between an external power supply and the ground, the external power supply is electrically connected with the anode of the diode D1, the cathode of the diode D1 is electrically connected with the input end of the switching regulator U2, the capacitor C40 and the capacitor C33 are connected between the input end of the switching regulator U2 and the ground in parallel, the grounding end of the switching regulator U2 is grounded, the capacitor C41 and the capacitor C42 are connected between the output end of the switching regulator U2 and the ground in parallel, the resistor R11 and the capacitor C12 are sequentially connected between the output end of the switching regulator U2 and the ground in series, the capacitor C13 is connected with the capacitor C12 in parallel, and the common end of the resistor R11 and the capacitor C12 are electrically connected with the circuit, and the output end of the switching regulator U2 is electrically connected with the ultrasonic drive circuit and the filter shaping circuit respectively.
3. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the ultrasonic drive circuit adopts a multi-channel analog switch chip U1 with the model number of SGM 4782.
4. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the filter shaping circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R15, a resistor R16, a resistor R17, a resistor R39, a capacitor C25, a capacitor C26, a capacitor C36, a capacitor C39 and an operational amplifier U3, wherein the resistor R4 and the resistor R5 are sequentially connected in series between a second output end of the power supply circuit and the ground, a common end of the resistor R4 and the resistor R5 is respectively and electrically connected with a primary operational amplifier non-inverting input end and a secondary operational amplifier non-inverting input end of the operational amplifier U3, the capacitor C26 and the resistor R5 are connected in parallel, the capacitor C39 and the resistor R17 are sequentially connected in series between an output end of the ultrasonic drive circuit and a primary operational amplifier inverting input end of the operational amplifier U3, the resistor R6 is electrically connected between a primary operational amplifier inverting input end and an output end of the operational amplifier U3, a primary operational amplifier positive power supply input end of the operational amplifier U5 3 is grounded, the negative power supply input end that operational amplifier U3's one-level operation was put passes through electric capacity C36 ground connection, just the negative power supply input end that operational amplifier U3's one-level operation was put with power supply circuit's second output electricity is connected, it has in order to establish ties between operational amplifier U3's one-level operation's the output and the reverse input end that second level operation was put electric capacity C25 and resistance R16, electric connection has between the common terminal of electric capacity C25 and resistance R16 and the output of operational amplifier U3's second level operation is put between the output electric connection have resistance R15, operational amplifier U3's second level operation is put, and electric connection has between reverse input and the output resistance R39, the output of operational amplifier U3's second level operation is put the input electricity of main control circuit is connected.
5. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the main control circuit adopts a single chip microcomputer with the model number of STM32F407VGT 6.
6. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the ultrasonic probe assembly comprises at least two pairs of receiving and transmitting integrated ultrasonic sensors which are arranged in an orthogonal mode, and the ultrasonic sensors are electrically connected with the ultrasonic drive circuit.
7. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 6, wherein: the ultrasonic probe assembly further comprises a temperature and humidity sensor, and the temperature and humidity sensor is electrically connected with the ultrasonic drive circuit.
8. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 6, wherein: the ultrasonic probe assembly further comprises an air pressure sensor, and the air pressure sensor is electrically connected with the ultrasonic driving circuit.
9. The sensing and detecting circuit for measuring wind speed and wind direction based on ultrasonic waves of claim 1, wherein: the power supply circuit is electrically connected with the communication circuit.
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| CN201921323305.0U CN210514359U (en) | 2019-08-15 | 2019-08-15 | Sensing detection circuit based on ultrasonic measurement wind speed and wind direction |
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| CN201921323305.0U CN210514359U (en) | 2019-08-15 | 2019-08-15 | Sensing detection circuit based on ultrasonic measurement wind speed and wind direction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721967A (en) * | 2020-06-29 | 2020-09-29 | 威海精讯畅通电子科技有限公司 | Small-sized ultrasonic wind speed and direction detector and wind speed and direction detection method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721967A (en) * | 2020-06-29 | 2020-09-29 | 威海精讯畅通电子科技有限公司 | Small-sized ultrasonic wind speed and direction detector and wind speed and direction detection method |
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