CN207181685U - A kind of supersonic range finder - Google Patents
A kind of supersonic range finder Download PDFInfo
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- CN207181685U CN207181685U CN201721128934.9U CN201721128934U CN207181685U CN 207181685 U CN207181685 U CN 207181685U CN 201721128934 U CN201721128934 U CN 201721128934U CN 207181685 U CN207181685 U CN 207181685U
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Abstract
The utility model discloses a kind of supersonic range finder, including：Range-measuring circuit plate；Ultrasonic wave transmitting probe, electrically connected with the range-measuring circuit plate, and the first soft silica gel pad for being used for absorbing ultrasonic transverse wave is provided between the ultrasonic wave transmitting probe and the range-measuring circuit plate；Ultrasonic wave receiving transducer, electrically connected with the range-measuring circuit plate, and the second soft silica gel pad for being used for absorbing ultrasonic transverse wave is provided between the ultrasonic wave receiving transducer and the range-measuring circuit plate.The utility model weakens the influence of ultrasonic transverse wave using soft silica gel pad and soft silica gel set, improves the precision of distance measurement result；And temperature-compensating is carried out to the spread speed of ultrasonic wave using temperature sensor, further increase the precision of distance measurement result.
Description
Technical field
Ultrasonic measurement field is the utility model is related to, espespecially a kind of supersonic range finder.
Background technology
Ultrasonic wave is the sound wave that a kind of frequency is more than 20kHz, has the ability of straightline propagation, frequency is higher, diffracting power
It is poorer, but albedo is stronger, and its directive property is strong, and energy expenditure is slow, and the distance propagated in media as well is distant.
Ultrasonic wave can produce the wave of oscillation of three kinds of forms in media as well：Shear wave, compressional wave and surface wave.Shear wave shakes for particle
Ripple of the dynamic direction perpendicular to the direction of propagation；Compressional wave is the particle vibration direction ripple consistent with the direction of propagation；Surface wave shakes for particle
The dynamic ripple between compressional wave and shear wave, propagated along surface.
Ultrasonic transverse wave is a kind of interference signal for supersonic range finder, influences whether the detection of reflection echo,
So as to which the calculating to the time brings interference, the measurement result of Ultrasonic ranging device is influenceed.
The content of the invention
The purpose of this utility model is to provide a kind of supersonic range finder, can cut down the interference of ultrasonic transverse wave, carry
High range accuracy.
The technical scheme that the utility model is provided is as follows：
A kind of supersonic range finder, including：Range-measuring circuit plate；Ultrasonic wave transmitting probe, with range-measuring circuit plate electricity
Connection, and the first soft silicon for being used for absorbing ultrasonic transverse wave is provided between the ultrasonic wave transmitting probe and the range-measuring circuit plate
Rubber cushion；Ultrasonic wave receiving transducer, electrically connected with the range-measuring circuit plate, and the ultrasonic wave receiving transducer and the range-measuring circuit
The the second soft silica gel pad for being used for absorbing ultrasonic transverse wave is provided between plate.
In the above-mentioned technical solutions, by setting soft silica gel pad super to absorb between ultrasonic probe and range-measuring circuit plate
The ultrasonic transverse wave of sonic probe wherein one side, to improve the precision of distance measurement result.
Further, in addition to：For absorbing the first soft silica gel set of ultrasonic transverse wave, the first soft silica gel set is sheathed on
The outside of the ultrasonic wave transmitting probe；For absorbing the second soft silica gel set of ultrasonic transverse wave, the second soft silica gel set set
Located at the outside of the ultrasonic wave receiving transducer.
In the above-mentioned technical solutions, at the same set soft silica gel set and soft silica gel pad can absorb multiaspect on ultrasonic probe
Ultrasonic transverse wave, reduce influence of the ultrasonic transverse wave to echo, further improve range accuracy.
Further, the range-measuring circuit plate is provided with：Control circuit；Square wave for launching the control circuit is carried out
The power amplification circuit of power amplification, the power amplification circuit electrically connect with the control circuit, and power amplification electricity
Road electrically connects with the ultrasonic wave transmitting probe.
In the above-mentioned technical solutions, the setting of control circuit and power amplification circuit ensure that the calculating of distance measurement result, with
And ultrasonic signal is sent.
Further, the range-measuring circuit plate is additionally provided with：Electric signal for the ultrasonic wave receiving transducer to be sent is carried out
Denoising, the filter amplification circuit of filtering, the filter amplification circuit electrically connect with the ultrasonic wave receiving transducer；For that will go
Make an uproar, amplify after signal comparator circuit of the electric signal compared with reference signal, the signal comparator circuit and the filtering
Amplifying circuit electrically connects, and the signal comparator circuit electrically connects with the control circuit.
In the above-mentioned technical solutions, using reference signal come with denoising, amplification after electric signal compared with, so as to confirm
Whether reflection echo signal is received, it is convenient, fast.
Further, it is additionally provided with the range-measuring circuit plate：For measuring the temperature sensor of medium temperature, with the control
Circuit electrically connects.
In the above-mentioned technical solutions, the spread speed of ultrasonic wave is compensated using temperature sensor, improves ranging knot
The precision of fruit.
Further, the control circuit is MCU.
Further, the power amplification circuit is MAX232 chips.
Further, the filter amplification circuit and the signal comparator circuit use TLV274 chips；The filter and amplification
Circuit includes：First group of operational amplifier and second group of operational amplifier in the TLV274 chips；The signal is more electric
Road includes：The 3rd group of operational amplifier in the TLV274 chips.
Further, the ultrasonic wave transmitting probe and the ultrasonic wave receiving transducer are piezoelectric ceramic type ultrasonic probe.
Compared with prior art, supersonic range finder beneficial effect of the present utility model is：
The influence of ultrasonic transverse wave is weakened using soft silica gel pad and soft silica gel set, improves the precision of distance measurement result；And
Temperature-compensating is carried out to the spread speed of ultrasonic wave using temperature sensor, further increases the precision of distance measurement result.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the structural representation of the utility model supersonic range finder one embodiment；
Fig. 2 is the structural representation of another embodiment of the utility model supersonic range finder；
Fig. 3 is the working timing figure of the utility model supersonic range finder one embodiment；
Fig. 4 is the partial circuit diagram of the utility model supersonic range finder one embodiment.
Drawing reference numeral explanation：
10. range-measuring circuit plate, 11. control circuits, 12. power amplification circuits, 13. filter amplification circuits, 14. signals compare
Circuit, 15. temperature sensors, 20. ultrasonic wave transmitting probes, 21. first soft silica gel pads, 22. first soft silica gel sets, 30. ultrasounds
Ripple receiving transducer, 31. second soft silica gel pads, 32. second soft silica gel sets.
Embodiment
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, accompanying drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that drawings in the following description are only of the present utility model one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings, and obtains other embodiments.
To make simplified form, the part related to the utility model is only schematically show in each figure, they are not
Represent its practical structures as product.In addition, so that simplified form readily appreciates, there is identical structure or work(in some figures
The part of energy, only symbolically depicts one of those, or only marked one of those.Herein, "one" is not only
Represent " only this ", the situation of " more than one " can also be represented.
In one embodiment of the present utility model, as shown in figure 1, a kind of supersonic range finder, including：Range-measuring circuit
Plate 10；Ultrasonic wave transmitting probe 20, electrically connected with the range-measuring circuit plate 10, and the ultrasonic wave transmitting probe 20 and the survey
Away from the first soft silica gel pad 21 being provided between circuit board 10 for absorbing ultrasonic transverse wave；Ultrasonic wave receiving transducer 30, it is and described
Range-measuring circuit plate 10 electrically connects, and is provided between the ultrasonic wave receiving transducer 30 and the range-measuring circuit plate 10 super for absorbing
Second soft silica gel pad 31 of sound wave shear wave.
Specifically, be equipped with various circuits on range-measuring circuit plate, range-measuring circuit plate (on a certain circuit) sends out electric signal
Ultrasonic wave transmitting probe is delivered to, ultrasonic wave transmitting probe is propagated after converting electrical signals to ultrasonic signal into air dielectric；
When running into barrier during ultrasonic signal is propagated in air dielectric and reflecting, received by ultrasonic wave receiving transducer anti-
The ultrasonic signal (reflection echo signal) come is emitted back towards, and this reflection echo signal is converted into electric signal and sent to range-measuring circuit
Plate is (i.e. super to the time difference for receiving reflection echo signal according to ultrasonic signal is sent by corresponding circuit on range-measuring circuit
The time that acoustic signals are propagated in media as well), default range formula, try to achieve supersonic range finder to the distance of barrier.
Default range formula is：S=C* △ t/2, C are the spread speed of ultrasonic wave in media as well, and △ t are that ultrasonic wave exists
The time of Propagation, S are distance of the supersonic range finder to barrier.
One end of ultrasonic wave transmitting probe has two the first signal pins, is provided with the first soft silica gel pad and described
The one-to-one first through hole of one signal pin, the first signal pin of ultrasonic wave transmitting probe passes through first through hole, with ranging
Circuit board electrical connection.
Similarly, one end of ultrasonic wave receiving transducer has two secondary signal pins, be provided with the second soft silica gel pad with
One-to-one second through hole of secondary signal pin, the secondary signal pin of ultrasonic wave receiving transducer pass through the second through hole,
Electrically connected with range-measuring circuit plate.
Range-measuring circuit plate is with ultrasonic wave (reception/transmitting) probe by contacting electric connection or electrically being connected by wire
Connect.Wherein, the signal pin and the pad on range-measuring circuit plate that electric connection can be ultrasonic wave (reception/transmitting) probe are contacted
It is electrically connected with by welding or directly contact.
The the first/bis- soft silica gel pad set between ultrasonic wave (reception/transmitting) probe and range-measuring circuit plate is super for absorbing
Sound wave shear wave, to weaken influence of the ultrasonic transverse wave to distance measurement result.Preferably, ultrasonic wave (reception/transmitting) probe is piezoelectricity
Ceramic-type ultrasonic probe, TCT40-16T/R piezoelectric ceramic ultrasounds probe (sensor) can be selected.
In the present embodiment, by setting soft silica gel pad to be visited to absorb ultrasonic wave between ultrasonic probe and range-measuring circuit plate
The ultrasonic transverse wave of head wherein one side, to improve the precision of distance measurement result.
Preferably, in addition to：The first soft silica gel for absorbing ultrasonic transverse wave covers 22, and first soft silica gel covers 22 sets
Located at the outside of the ultrasonic wave transmitting probe 20；The second soft silica gel for absorbing ultrasonic transverse wave covers 32, and described second is soft
Silica gel sheath 32 is sheathed on the outside of the ultrasonic wave receiving transducer 30.
Specifically, being arranged with the first soft silica gel set on the outside (i.e. lateral surface) of ultrasonic wave transmitting probe, it can absorb
The ultrasonic transverse wave of ultrasonic wave transmitting probe lateral surface；Similarly, it is arranged with the outside (i.e. lateral surface) of ultrasonic wave receiving transducer
Second soft silica gel set, it can absorb the ultrasonic transverse wave of ultrasonic wave receiving transducer lateral surface.
In the present embodiment, while the soft silica gel set and soft silica gel pad set can absorb the ultrasound of multiaspect on ultrasonic probe
Ripple shear wave, influence of the ultrasonic transverse wave to echo is reduced, so as to improve range accuracy.
Preferably, the hardness range of the first soft silica gel pad and the second soft silica gel pad is HS30 to HS35.First
Soft silica gel covers and the second soft silica gel set hardness range is HS30 to HS35.Specifically, the hardness of soft silica gel pad, soft silica gel set is made
One restriction, it can realize that its absorbs ultrasonic transverse wave, and can plays a protective role to ultrasonic probe.Preferably, first
The hardness of soft silica gel pad and the second soft silica gel pad takes HS34；First soft silica gel covers and the second soft silica gel set hardness takes HS34.
In another embodiment of the present invention, in addition to same as described above, therefore not to repeat here for same section, such as schemes
Shown in 2, range-measuring circuit plate 10 is provided with：Control circuit 11；Square wave for launching the control circuit 11 carries out power and put
Big power amplification circuit 12, the power amplification circuit 12 electrically connect with the control circuit 11, and power amplification electricity
Road 12 electrically connects with the ultrasonic wave transmitting probe 20.Preferably, the control circuit is MCU.
Specifically, control circuit can be used for measuring, the interval for sending ultrasonic wave and receiving reflection echo being calculated
Time △ t, supersonic range finder is then calculated to the distance S (i.e. distance measurement result) of barrier according to S=C* △ t/2.
Control circuit can use 8 MCU (when in use, it is necessary to connect conventional peripheral circuit, such as：Pull-up
Resistance, filter circuit etc., the connected mode of its peripheral circuit is prior art, and therefore not to repeat here), such as：STC15W202S
Chip, STC15W202S chip prices are cheap, and internal resource enriches, and especially it is single command cycle MCU, framework more same than same type
Fast 12 times of other model MCU speed.Further, it is additionally provided with result output interface in control circuit, the knot in control circuit
Fruit output interface is directly made up of MCU universal I/O port, for exporting distance measurement result.Certainly, the application performance parameter is being met
In the case of, can be according to the difference of usage scenario, and the difference of the carrying information of workload, being adapted to property is replaced by
Other chips, include the single-chip microcomputer of 51 series, PIC series, and ARM series etc..
Control circuit includes：Square-wave transmission sub-circuit, it can be completed by a part of module in MCU.Such as：Pass through
Software program method by STC15W202S chips produce frequency be 40kHz, 8 that dutycycle 50%, highest amplitude are 5VDC
Square-wave signal, it can so reduce the reliability that hardware cost and can improves supersonic range finder.
Power amplification circuit is in order to which the square wave for launching square-wave transmission sub-circuit carries out power amplification, power amplification circuit
MAX232 chips can be used to realize, MAX232 chip internals have piece to carry charge pump, and piece, which carries charge pump, has boost capability, can
Generation+10V voltages.
In another embodiment of the present invention, in addition to same as described above, range-measuring circuit plate 10 is additionally provided with：For inciting somebody to action
The electric signal that the ultrasonic wave receiving transducer 30 is sent carries out denoising, the filter amplification circuit 13 of filtering, the filter and amplification electricity
Road 13 electrically connects with the ultrasonic wave receiving transducer 30；For by denoising, amplification after electric signal compared with reference signal
Signal comparator circuit 14, the signal comparator circuit 14 electrically connects with the filter amplification circuit 13, and the signal compares
Circuit 14 electrically connects with the control circuit 11.
Specifically, when the ultrasonic signal launched reflects because encountering barrier, ultrasonic wave receiving transducer can connect
This reflection echo signal reflected is received, and this reflection echo signal is converted into corresponding electric signal, this electric signal is sent
To filter amplification circuit, this electric signal is filtered and amplifies and (realizes denoising), then the electric signal after denoising, amplification is sent out
Signal comparator circuit is delivered to, compared with reference signal, obtains comparative result, comparative result is sent to control circuit (i.e.
MCU)。
Preferably, filter amplification circuit 13 and the signal comparator circuit 14 use TLV274 chips；The filter and amplification
Circuit includes：First group of operational amplifier and second group of operational amplifier in the TLV274 chips；The signal is more electric
Road includes：The 3rd group of operational amplifier in the TLV274 chips.
Specifically, TLV274 chips are when in use, respective peripheral capacitance resistance ware can be connected with, to realize filter and amplification, letter
Number function of comparing.There are four groups of operational amplifiers in TLV274 chips, wherein first group of operational amplifier, second group of operation amplifier
Device and capacitance resistance component composition filter amplification circuit；3rd group of operational amplifier is equipped with corresponding Resistor-Capacitor Unit and a triode
Signal comparator circuit is formed, its annexation refer to Fig. 4.
Filter and amplification, signal comparing function are realized simultaneously using a chip, hardware cost is reduced, reduces ultrasonic wave
The volume of range unit.In another embodiment of the present invention, in addition to unlike those described above, also set on range-measuring circuit plate
Have：For measuring the temperature sensor 15 of medium temperature, electrically connected with the control circuit 11.
Specifically, in ultrasonic ranging, predominantly detect the transmitting of compressional wave and receive the time difference to calculate distance.Due to super
Sound wave compressional wave is a kind of sound wave, and its spread speed is relevant with gaseous species, pressure and temperature.In atmosphere, ultrasonic wave compressional wave
Spread speed is mainly relevant with the pressure and temperature of air, due to atmospheric pressure change very little, environment temperature meeting under normal condition
Large effect is produced to its spread speed, so as to influence distance measurement result.
It is influenced by temperature larger in view of the spread speed of ultrasonic wave, therefore, in the present embodiment adds a temperature
Sensor is to realize the compensation of temperature.General ultrasonic wave is propagated in middle air, and therefore, most of this temperature sensor is used for
The air themperature of measuring environment.
Temperature sensor can use DS18B20 temperature sensors, and DS18B20 has small volume, and hardware spending is low, resist dry
Disturb the characteristics of ability is strong, and precision is high.
When control circuit obtains the temperature of temperature sensor measurement, it can pass through formula：C=331.4+0.607T
(m/s), wherein, C is the spread speed of ultrasonic wave, and T is the temperature of temperature sensor measurement, realizes temperature-compensating, amendment ultrasound
The spread speed of ripple；
So as to according to formula：S=C* △ t/2, when calculating distance measurement result, obtain more accurate distance measurement result.
In another embodiment of the present invention, a kind of supersonic range finder, as shown in Figure 1, 2, including：Range-measuring circuit
Plate 10；Ultrasonic wave transmitting probe 20, electrically connected with the range-measuring circuit plate, and the ultrasonic wave transmitting probe and ranging electricity
The the first soft silica gel pad 21 for being used for absorbing ultrasonic transverse wave is provided between the plate of road；For absorbing the first soft silica gel of ultrasonic transverse wave
Set 22, the first soft silica gel set is sheathed on the outside of the ultrasonic wave transmitting probe；Ultrasonic wave receiving transducer 30, with the survey
It is provided with away from circuit board electrical connection, and between the ultrasonic wave receiving transducer and the range-measuring circuit plate and is used to absorb ultrasonic transverse wave
The second soft silica gel pad 31；For absorbing the second soft silica gel set of ultrasonic transverse wave, the second soft silica gel set 32 is sheathed on institute
State the outside of ultrasonic wave receiving transducer；
Range-measuring circuit plate is provided with：
Control circuit 11 (it can use a MCU)；
Square wave for launching the control circuit carries out the power amplification circuit 12 of power amplification, the power amplification
Circuit electrically connects with the control circuit, and the power amplification circuit electrically connects with the ultrasonic wave transmitting probe；
Electric signal for the ultrasonic wave receiving transducer to be sent carries out the filter amplification circuit 13 of denoising, filtering, institute
Filter amplification circuit is stated to electrically connect with the ultrasonic wave receiving transducer；
For the signal comparator circuit 14 by the electric signal after denoising, amplification compared with reference signal, the signal
Comparison circuit electrically connects with the filter amplification circuit, and the signal comparator circuit electrically connects with the control circuit；
For measuring the temperature sensor 15 of medium temperature, electrically connected with the control circuit.
Specifically, the operation principle of the supersonic range finder of the present embodiment is with reference to as follows：
As shown in figure 3, when control circuit receive a start pulse signal (such as：One width touches more than 10uS's
Send out pulse signal) when, control circuit produces frequency 40kHz, 8 square-wave signals of dutycycle 50%, and the square-wave signal passes through
Ultrasonic wave transmitting probe is directly acted on after power amplification circuit amplification, after ultrasonic wave transmitting probe amplifies power amplification circuit
Electric signal be converted to and propagated in ultrasonic wave direction air dielectric.
This ultrasonic wave runs into barrier and reflected during Medium Propagation；Ultrasonic wave receiving transducer, which receives, to be reflected back
Ripple signal, reflection echo signal (ultrasonic signal reflected) is changed into electric signal, this electric signal transmission to filtering
Amplifying circuit is handled, and the electric signal after processing exports comparative result to control circuit and made compared with reference signal
To judge whether to receive the foundation of reflection echo signal.General reference signal is set to 0, when receiving reflection echo signal, its
Electric signal after treatment is naturally larger than 0, therefore, is confirmed whether to receive by judging whether the judged result more than 0 anti-
Echo-signal is penetrated, thus, the time difference is calculated.
When sending ultrasonic signal, a time point t1 is had, when acknowledging receipt of reflection echo signal, also there is one
Time point t2, control circuit calculate time difference t2-t1, i.e. △ t between the two.Because control circuit sends square-wave signal and ultrasound
The time interval that ripple transmitting probe is sent between ultrasonic wave is minimum, can ignore；Ultrasonic wave receiving transducer receives reflection echo
The time interval that signal and signal comparator circuit are acknowledged receipt of between reflection echo signal is minimum, accordingly it is also possible to ignore.
The current environmental temperature T that temperature sensor is detected is sent to control circuit, and control circuit is according to above-mentioned public affairs
Formula and temperature T, obtain the spread speed C of revised ultrasonic wave；Further according to spread speed C and the △ t of revised ultrasonic wave,
Distance S, i.e. distance measurement result is calculated.Distance measurement result can be exported by the result output interface in control circuit, that is, be passed through
As a result output interface output response signal.
It should be noted that above-described embodiment can independent assortment as needed.Described above is only of the present utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
On the premise of, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
- A kind of 1. supersonic range finder, it is characterised in that including：Range-measuring circuit plate；Ultrasonic wave transmitting probe, electrically connected with the range-measuring circuit plate, and the ultrasonic wave transmitting probe and the range-measuring circuit The the first soft silica gel pad for being used for absorbing ultrasonic transverse wave is provided between plate；Ultrasonic wave receiving transducer, electrically connected with the range-measuring circuit plate, and the ultrasonic wave receiving transducer and the range-measuring circuit The the second soft silica gel pad for being used for absorbing ultrasonic transverse wave is provided between plate.
- 2. supersonic range finder as claimed in claim 1, it is characterised in that also include：For absorbing the first soft silica gel set of ultrasonic transverse wave, the first soft silica gel set is sheathed on the ultrasonic wave transmitting probe Outside；For absorbing the second soft silica gel set of ultrasonic transverse wave, the second soft silica gel set is sheathed on the ultrasonic wave receiving transducer Outside.
- 3. supersonic range finder as claimed in claim 1, it is characterised in that the range-measuring circuit plate is provided with：Control circuit；Carry out the power amplification circuit of power amplification for the square wave launched the control circuit, the power amplification circuit with The control circuit electrical connection, and the power amplification circuit electrically connects with the ultrasonic wave transmitting probe.
- 4. supersonic range finder as claimed in claim 3, it is characterised in that the range-measuring circuit plate is additionally provided with：Electric signal for the ultrasonic wave receiving transducer to be sent carries out the filter amplification circuit of denoising, filtering, the filtering Amplifying circuit electrically connects with the ultrasonic wave receiving transducer；It is more electric for the signal comparator circuit by the electric signal after denoising, amplification compared with reference signal, the signal Road electrically connects with the filter amplification circuit, and the signal comparator circuit electrically connects with the control circuit.
- 5. supersonic range finder as claimed in claim 3, it is characterised in that be additionally provided with the range-measuring circuit plate：For The temperature sensor of medium temperature is measured, is electrically connected with the control circuit.
- 6. supersonic range finder as claimed in claim 3, it is characterised in that the control circuit is MCU.
- 7. supersonic range finder as claimed in claim 3, it is characterised in that the power amplification circuit is MAX232 cores Piece.
- 8. supersonic range finder as claimed in claim 4, it is characterised in that the filter amplification circuit and signal ratio TLV274 chips are used compared with circuit；The filter amplification circuit includes：First group of operational amplifier and second group of operation amplifier in the TLV274 chips Device；The signal comparator circuit includes：The 3rd group of operational amplifier in the TLV274 chips.
- 9. supersonic range finder as claimed in claim 1, it is characterised in that the ultrasonic wave transmitting probe and the ultrasound Ripple receiving transducer is piezoelectric ceramic type ultrasonic probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721128934.9U CN207181685U (en) | 2017-09-05 | 2017-09-05 | A kind of supersonic range finder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721128934.9U CN207181685U (en) | 2017-09-05 | 2017-09-05 | A kind of supersonic range finder |
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| Publication Number | Publication Date |
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| CN207181685U true CN207181685U (en) | 2018-04-03 |
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ID=61743018
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| CN201721128934.9U Active CN207181685U (en) | 2017-09-05 | 2017-09-05 | A kind of supersonic range finder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318885A (en) * | 2018-05-08 | 2018-07-24 | 清华大学苏州汽车研究院（吴江） | A kind of ultrasonic sensor |
| CN108674848A (en) * | 2018-05-07 | 2018-10-19 | 深圳市粤能环保科技有限公司 | Material overflow status monitoring method, system and dustbin |
| CN113252937A (en) * | 2021-05-24 | 2021-08-13 | 国家海洋技术中心 | Miniaturized ultrasonic wind speed sensor and wind speed measuring method thereof |
-
2017
- 2017-09-05 CN CN201721128934.9U patent/CN207181685U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108674848A (en) * | 2018-05-07 | 2018-10-19 | 深圳市粤能环保科技有限公司 | Material overflow status monitoring method, system and dustbin |
| CN108318885A (en) * | 2018-05-08 | 2018-07-24 | 清华大学苏州汽车研究院（吴江） | A kind of ultrasonic sensor |
| CN113252937A (en) * | 2021-05-24 | 2021-08-13 | 国家海洋技术中心 | Miniaturized ultrasonic wind speed sensor and wind speed measuring method thereof |
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