CN109883535A - A kind of vibration measurement device and method based on millimeter wave - Google Patents
A kind of vibration measurement device and method based on millimeter wave Download PDFInfo
- Publication number
- CN109883535A CN109883535A CN201910074793.4A CN201910074793A CN109883535A CN 109883535 A CN109883535 A CN 109883535A CN 201910074793 A CN201910074793 A CN 201910074793A CN 109883535 A CN109883535 A CN 109883535A
- Authority
- CN
- China
- Prior art keywords
- signal
- wave
- millimeter
- unit
- antenna array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of vibration measurement device and method based on millimeter wave, antenna array unit including microwave beam for transmitting and receiving, antenna array unit passes sequentially through millimeter wave transceiving unit and baseband signal processing unit is connected to data acquisition and processing unit；Millimeter wave transceiving unit generates millimeter-wave signal and is issued by antenna array unit, the vibrational state that blower to be measured also is calculated according to echo-signal is connect by antenna array unit receives echo-signal, data acquisition and processing unit；The present invention utilizes the wave beam of millimeter wave array structure specific direction, by changing beam direction, can test simultaneously different test points, it is only necessary to which the vibration measurement to blower can be realized in an acquisition node, reduces entire measuring system cost.
Description
[technical field]
The invention belongs to fan test fields of measurement more particularly to a kind of vibration measurement devices and side based on millimeter wave
Method.
[background technique]
Blower is extensive in industrial applications such as metallurgy, chemical industry and mines.These high-power blowers need long-term non-stop run
And revolving speed is higher, therefore causes vibration and noise excessive.With the increase of use time, these blowers itself vibration will increasingly
Significantly, after vibration is more than certain amplitude, it will seriously affect itself and work normally, or even cause production accident, therefore, to big function
The vibration detection of rate blower is a highly important safety in production item.
Existing method for detecting vibration has current vortex sensor and based on modes such as foil gauges.Wherein, current vortex sensor
Faraday electromagnetic induction principle is utilized, i.e., when metallic conductor is placed in alternating magnetic field, the induction of vortex shape will be generated in conductor
Electric current.When actual use, a high-frequency signal (such as 1MHz) is loaded in probe portion, can change when vibration occurs and believe on probe
Number amplitude and phase.In patent CN106969825A, resistance strain gage vibrating sensing probe and LC vibrating circuit are used
The methods of probe.
In addition a kind of is wireless exploration method, uses wireless sensor network the relevant technologies in patent CN101902831B
Measuring signal is wirelessly transferred, related data is acquired by each node, then uploads to central node.Patent
In CN104568118A, uses visualization (" vibration camera ") method and detected, which employs multiple laser vibrometers sensings
Device.Such methods need to place above sensor to blower, and most of more demanding to sensor itself, cost is high,
It is difficult to that application is unfolded on a large scale.Laser is used in patent CN104931126A and ultrasonic wave carries out vibration detection, this method pair
It is aligned more demanding, the receiving end of laser must be directed at transmitting terminal.This method greatly limits measurement scene, applies very
It is inconvenient.
In summary, with upper type, it is required to setting at least two acquisition node, fan condition is acquired, due to this
Class equipment and acquisition node cost of manufacture are high, if it is even more the cost for substantially increasing measuring device that multiple acquisition nodes, which are arranged,.
[summary of the invention]
The object of the present invention is to provide a kind of vibration measurement device and method based on millimeter wave, passes through an acquisition node
Vibration measurement is carried out to blower, to achieve the purpose that reduce fan vibration testing cost.
The invention adopts the following technical scheme: a kind of vibration measurement device based on millimeter wave, including for emitting and connecing
The antenna array unit of microwave beam is received, antenna array unit passes sequentially through millimeter wave transceiving unit and baseband signal processing unit
It is connected to data acquisition and processing unit；
Millimeter wave transceiving unit is used to generate millimeter-wave signal and is handled signal and be transmitted to antenna array unit,
It is also used to carry out antenna array unit received millimeter-wave signal processing and generates the quadrature component Q for receiving millimeter-wave signal and same
Phase component I, and quadrature component Q and in-phase component I are transmitted to baseband signal processing unit；
Baseband signal processing unit after quadrature component Q and in-phase component I are successively amplified and filtered for being sent to
Data acquisition and processing unit, data acquisition and processing unit are based on according to the quadrature component Q and in-phase component I for receiving signal
Calculate the vibrational state for obtaining blower to be measured.
Further, millimeter wave transceiving unit is made of signal transmitter unit and signal receiving unit；
Signal transmitter unit includes local oscillator, and the signal output end of local oscillator is connected to by power amplifier
First signal output end of the signal input part of the second power splitter, the second power splitter is connected to signal receiving unit, second signal
Output end is connected to the second port of circulator；The first port of circulator is connected to antenna array list by single-pole double-throw switch (SPDT)
Member, third port are connected to signal receiving unit；
Signal receiving unit includes the low-noise amplifier connecting with circulator third port, the signal of low-noise amplifier
Output end is connected to the signal input part of the first power splitter, and the first signal output end of the first power splitter is connected to by transposer
First signal input part of the first frequency mixer, the second signal output end of the first power splitter are connected to the first letter of the second frequency mixer
Number input terminal；
The second signal input terminal of first frequency mixer and the second signal input terminal of the second frequency mixer are connected to the second function
Divide the first signal output end of device；The signal output end of first frequency mixer and the second frequency mixer is connected to base band signal process list
Member；
First frequency mixer is used to the quadrature component Q for receiving signal being sent to baseband signal processing unit, the second frequency mixer
For the in-phase component I for receiving signal to be sent to baseband signal processing unit；
The signal transmission path of circulator is that second port is transmitted to first port, first port is transmitted to third port.
Further, baseband signal processing unit includes the first base band letter connecting with the signal output end of the first frequency mixer
Number amplifier and the second baseband signal amplifier (35) connecting with the signal output end of the second frequency mixer, the first baseband signal are put
The signal output end of big device and the second baseband signal amplifier (35) is connected to data acquisition and processing unit；
Baseband signal processing unit further includes triangular-wave generator, and triangular-wave generator signal output end is connected to the machine vibration
The signal input part of device is swung, the signal input part of triangular-wave generator is connected to data acquisition and the signal output of processing unit
End.
Further, antenna array unit includes transmitting antenna array and receiving antenna array.
Another technical solution of the invention: a kind of data processing algorithm, applied to above-mentioned a kind of based on millimeter wave
Vibration measurement device, method particularly includes:
Triangular wave generation parameter information is sent to triangle wave generation device, triangle wave generation device is generated according to triangular wave
Parameter information generates triangular wave and is sent to signal transmitter unit, and signal transmitter unit generates millimeter-wave signal simultaneously according to triangular wave
It is issued by transmitting antenna array；
The reflected millimeter-wave signal of blower to be measured is received by receiving antenna array, and is mentioned by signal transmitter unit
Take out the quadrature component Q and in-phase component I of reflected millimeter-wave signal；
Quadrature component Q and in-phase component I are amplified and be filtered, and according to treated quadrature component Q and same
The vibrational state of blower to be measured is calculated in phase component I.
Further, according to the vibrational state of treated quadrature component Q and in-phase component I is calculated blower to be measured
Method particularly includes:
The signal amplitude for defining reference signal is sR(n), wherein the received millimeter-wave signal of n=1,2,3 ..., N, N
Time acquisition node；
By the signal amplitude s of reference signalR(n) it is compared, is obtained so that s with preset threshold TR(n) > T it is each when
Between acquisition node i, i=1,2 ..., N, time acquisition node i be reflected millimeter-wave signal in each wave beam rise
Beginning timing node；
The starting point set N in each period in reflected millimeter-wave signal is obtained according to each initial time node iS
={ i1,i2,...iM, wherein iMFor the initial time node of m-th wave beam in reflected millimeter-wave signal, M is reflection
The sum of wave beam in millimeter-wave signal back；
It will reflect back into the millimeter-wave signal come the in-phase component I of the initial time node of adjacent two wave beams and orthogonal
Component Q carries out difference operation and combines, and obtains the initial time of two wave beams adjacent in reflected millimeter-wave signal
The phase change value d (r) of node=[sI(ir+1)-sI(ir)]+j[sQ(ir+1)-sQ(ir)], phase change value is blower to be measured
Relative Vibration value, wherein
The consecutive variations phase value d of two wave beams adjacent in reflected millimeter-wave signal is calculated according to d (r)
(r+p)=[sI(ir+1+p)-sI(ir+p)]+j[sQ(ir+1+p)-sQ(ir+ p)], consecutive variations phase value is blower to be measured
Continuous shaking value, wherein p is the number for the timing node for including in each wave beam in reflected millimeter-wave signal.
The beneficial effects of the present invention are: the present invention utilizes the wave beam of millimeter wave array structure specific direction, by changing wave
Shu Fangxiang can simultaneously test different test points, anti-again behind millimeter wave wave beam arrival some position of blower of transmitting
It is emitted back towards, can be detected out oscillation amplitude using the phase difference of distance back and forth, it can be in different check bits by switching-beam
It sets and measures, it is only necessary to the vibration measurement to blower can be realized in an acquisition node, reduces entire measuring system cost,
Meanwhile millimetre wavelength is shorter, measurement accuracy can achieve grade, for large scale equipment this for blower, vibrate precision
Measurement is sufficient for sb.'s need.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of the vibration measurement device based on millimeter wave in the present invention；
Fig. 2 is the echo signal diagram in the present invention；
Fig. 3 is the echo signal diagram that measuring device of the present invention receives blower without friction；
Fig. 4 is the echo signal diagram that measuring device of the present invention receives vibration fan.
Wherein: 1. antenna array units；
11. transmitting antenna array；12. receiving antenna array；
2. millimeter wave transceiving unit；
20. the second frequency mixer；21. circulator；22. low-noise amplifier；23. the first power splitter；24. transposer；25
One frequency mixer；26. the second power splitter；27. power amplifier；28. local oscillator；29. single-pole double-throw switch (SPDT)；
3. baseband signal processing unit；
31. the first baseband signal amplifier；32. triangular-wave generator；33. the first low-pass filter；34. the second low pass filtered
Wave device；35. the second baseband signal amplifier；
4. data acquisition and processing unit.
[specific embodiment]
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The invention discloses a kind of vibration measurement devices based on millimeter wave, as shown in Figure 1, including for transmitting and receiving
The antenna array unit 1 of microwave beam, antenna array unit 1 include transmitting antenna array 11 and receiving antenna array 12, each
Antenna in antenna array unit 1 is provided with transposer to control the transmitting of wave beam and reception.
Antenna array unit 1 passes sequentially through millimeter wave transceiving unit 2 and baseband signal processing unit 3 is connected to data acquisition
And processing unit 4.
Millimeter wave transceiving unit 2 is for generating millimeter-wave signal and being handled signal and be transmitted to antenna array unit
1, it is also used to carry out the received millimeter-wave signal of antenna array unit 1 processing and generates the quadrature component Q for receiving millimeter-wave signal
With in-phase component I, and quadrature component Q and in-phase component I are transmitted to baseband signal processing unit 3.
Millimeter wave transceiving unit 2 is made of signal transmitter unit and signal receiving unit.
Signal transmitter unit includes local oscillator 28, and the signal output end of local oscillator 28 passes through power amplifier 27
It is connected to the signal input part of the second power splitter 26, the first signal output end of the second power splitter 26 is connected to signal and receives list
Member, second signal output end are connected to the second port of circulator 21；The first port of circulator 21 passes through single-pole double-throw switch (SPDT)
29 are connected to antenna array unit 1, and third port is connected to signal receiving unit；
Signal receiving unit includes the low-noise amplifier 22 connecting with 21 third port of circulator, low-noise amplifier 22
Signal output end be connected to the signal input part of the first power splitter 23, the first signal output end of the first power splitter 23 passes through shifting
Nuchinal organ 24 is connected to the first signal input part of the first frequency mixer 25, and the second signal output end of the first power splitter 23 is connected to
First signal input part of two frequency mixers 20；
The second signal input terminal of the second signal input terminal of first frequency mixer 25 and the second frequency mixer 20 is connected to
First signal output end of two power splitters 26；The signal output end of first frequency mixer 25 and the second frequency mixer 20 is connected to base band
Signal processing unit 3；
First frequency mixer 25 is used to for the quadrature component Q for receiving signal being sent to baseband signal processing unit 3, the second mixing
Device 20 is used to the in-phase component I for receiving signal being sent to baseband signal processing unit 3；
The signal transmission path of circulator 21 is that second port is transmitted to first port, first port is transmitted to third end
Mouthful.
Baseband signal processing unit 3 after quadrature component Q and in-phase component I are successively amplified and filtered for being sent to
Data acquisition and processing unit 4, data acquisition and processing unit 4 are used for according to the quadrature component Q and in-phase component I for receiving signal
The vibrational state of blower to be measured is calculated.
Baseband signal processing unit 3 includes the first baseband signal amplification connecting with the signal output end of the first frequency mixer 25
Device 31 and the second baseband signal amplifier 35 being connect with the signal output end of the second frequency mixer 20, the first baseband signal amplifier
31 and second baseband signal amplifier 35 signal output end be connected to data acquisition and processing unit 4；
Baseband signal processing unit 3 further includes triangular-wave generator 32, and 32 signal output end of triangular-wave generator is connected to
The signal input part of local oscillator 28, the signal input part of triangular-wave generator 32 are connected to data acquisition and processing unit 4
Signal output end.
The operation principle of the present invention is that:
Triangular wave is loaded on local oscillator 28 by triangular signal generator 32, local oscillator 28 generate with
Swept-frequency signal centered on 24GHz；Single-pole double-throw switch (SPDT) 29 is switched to transmitting antenna array 11, this swept-frequency signal is loaded into hair
It penetrates above aerial array 11；After this signal reaches some position of blower to be measured, reflect；
Receiving antenna array 12 receives reflection signal, and reflection signal is exported by circulator 21 by circulator third port,
In-phase component I and quadrature component Q is obtained after quadrature frequency conversion；In-phase component and quadrature component pass through base band signal process
Afterwards, data acquisition and processing unit are entered.
After the completion of processing, it is switched to transmitting antenna array 11, completes test；It circuits sequentially and is directly cut in different antennae array
Change measurement.
The invention also discloses a kind of data processing algorithms, applied to a kind of above-mentioned vibration measurement dress based on millimeter wave
It sets, method particularly includes:
Triangular wave generation parameter information is sent to triangle wave generation device 32, triangle wave generation device 32 is according to triangular wave
It generates parameter information to generate triangular wave and be sent to signal transmitter unit, signal transmitter unit generates millimeter wave according to triangular wave and believes
Number and issued by transmitting antenna array 11；
The reflected millimeter-wave signal of blower to be measured is received by receiving antenna array 12, and passes through signal transmitter unit
Extract the quadrature component Q and in-phase component I of reflected millimeter-wave signal；
Quadrature component Q and in-phase component I are amplified and be filtered, and according to treated quadrature component Q and same
The vibrational state of blower to be measured is calculated in phase component I.
According to the specific method of the vibrational state of treated quadrature component Q and in-phase component I is calculated blower to be measured
Are as follows:
The signal amplitude for defining reference signal is sR(n), wherein the received millimeter-wave signal of n=1,2,3 ..., N, N
Time acquisition node；Reference signal is the square-wave signal that triangular wave swept frequency signal is transformed into.
By the signal amplitude s of reference signalR(n) it is compared, is obtained so that s with preset threshold TR(n) > T it is each when
Between acquisition node i, i=1,2 ..., N, time acquisition node i be reflected millimeter-wave signal in each wave beam rise
Beginning timing node；
The starting point set N in each period in reflected millimeter-wave signal is obtained according to each initial time node iS
={ i1,i2,...iM, wherein iMFor the initial time node of m-th wave beam in reflected millimeter-wave signal, M is reflection
The sum of wave beam in millimeter-wave signal back；
It will reflect back into the millimeter-wave signal come the in-phase component I of the initial time node of adjacent two wave beams and orthogonal
Component Q carries out difference operation and combines, and obtains the initial time of two wave beams adjacent in reflected millimeter-wave signal
The phase change value d (r) of node=[sI(ir+1)-sI(ir)]+j[sQ(ir+1)-sQ(ir)], phase change value is blower to be measured
Relative Vibration value, wherein
The consecutive variations phase value d of two wave beams adjacent in reflected millimeter-wave signal is calculated according to d (r)
(r+p)=[sI(ir+1+p)-sI(ir+p)]+j[sQ(ir+1+p)-sQ(ir+ p)], consecutive variations phase value is blower to be measured
Continuous shaking value, wherein p is the number for the timing node for including in each wave beam in reflected millimeter-wave signal.
As shown in Fig. 2, horizontal axis is sampling time node for a certain section of echo-signal extracted, the longitudinal axis is echo letter
Number amplitude, wherein dotted line ref indicates reference signal, and I Channel indicates in-phase component echo-signal, T value in the embodiment
+ 0.4, then as seen from the figure, the 1st~230 time acquisition node is an echo period.As shown in figure 3, not having for blower to be measured
Measurement result figure when vibration, as seen from the figure, phase change are stablized, and the noise for reflecting system is stablized, i.e., blower vibration to be measured
Dynamic stability is allowing in oscillating region.As shown in figure 4, thering is the test result of vibration to output as seen from the figure for blower to be measured
Significant cyclical signal illustrates when blower to be measured works with vibration.
Claims (6)
1. a kind of vibration measurement device based on millimeter wave, which is characterized in that the day including microwave beam for transmitting and receiving
Linear array column unit (1), the antenna array unit (1) pass sequentially through millimeter wave transceiving unit (2) and baseband signal processing unit
(3) data acquisition and processing unit (4) are connected to；
The millimeter wave transceiving unit (2) is for generating millimeter-wave signal and being handled signal and be transmitted to the antenna array
Column unit (1) is also used to carry out the antenna array unit (1) received millimeter-wave signal processing and generates reception millimeter wave letter
Number quadrature component Q and in-phase component I, and the quadrature component Q and in-phase component I are transmitted to the base band signal process list
First (3)；
The baseband signal processing unit (3) is for after successively amplifying and filter to the quadrature component Q and in-phase component I
It is sent to the data acquisition and processing unit (4), the data acquisition and processing unit (4) are used for according to the reception signal
Quadrature component Q and in-phase component I the vibrational state of blower to be measured is calculated.
2. a kind of vibration measurement device based on millimeter wave as described in claim 1, which is characterized in that the millimeter wave transceiving
Unit (2) is made of signal transmitter unit and signal receiving unit；
The signal transmitter unit includes local oscillator (28), and the signal output end of the local oscillator (28) passes through power
Amplifier (27) is connected to the signal input part of the second power splitter (26), the first signal output end of second power splitter (26)
It is connected to the signal receiving unit, second signal output end is connected to the second port of circulator (21)；The circulator
(21) first port is connected to the antenna array unit (1) by single-pole double-throw switch (SPDT) (29), and third port is connected to institute
State signal receiving unit；
The signal receiving unit includes the low-noise amplifier (22) connecting with the circulator (21) third port, described low
The signal output end of noise amplifier (22) is connected to the signal input part of the first power splitter (23), first power splitter (23)
The first signal output end be connected to the first signal input part of the first frequency mixer (25), first function by transposer (24)
The first signal input part for dividing the second signal output end of device (23) to be connected to the second frequency mixer (20)；
The second signal input terminal of first frequency mixer (25) and the second signal input terminal of the second frequency mixer (20) are all connected with
To the first signal output end of second power splitter (26)；The signal of first frequency mixer (25) and the second frequency mixer (20)
Output end is connected to the baseband signal processing unit (3)；
First frequency mixer (25) is used to the quadrature component Q for receiving signal being sent to the baseband signal processing unit (3),
Second frequency mixer (20) is used to the in-phase component I for receiving signal being sent to the baseband signal processing unit (3)；
The signal transmission path of the circulator (21) is that second port is transmitted to first port, first port is transmitted to third end
Mouthful.
3. a kind of vibration measurement device based on millimeter wave as claimed in claim 2, which is characterized in that at the baseband signal
Reason unit (3) include the first baseband signal amplifier (31) being connect with the signal output end of first frequency mixer (25) and with
Second baseband signal amplifier (35) of the signal output end connection of second frequency mixer (20), first baseband signal are put
The signal output end of big device (31) and the second baseband signal amplifier (35) is connected to the data acquisition and processing unit
(4)；
The baseband signal processing unit (3) further includes triangular-wave generator (32), and triangular-wave generator (32) signal is defeated
Outlet is connected to the signal input part of the local oscillator (28), the signal input part connection of the triangular-wave generator (32)
To data acquisition and the signal output end of processing unit (4).
4. a kind of vibration measurement device based on millimeter wave as claimed in claim 2 or claim 3, which is characterized in that the antenna array
Column unit (1) includes transmitting antenna array (11) and receiving antenna array (12).
5. a kind of data processing algorithm, which is characterized in that any described a kind of based on millimeter wave applied to claim 1-4
Vibration measurement device, method particularly includes:
Triangular wave generation parameter information is sent to triangle wave generation device (32), the triangle wave generation device (32) is according to institute
It states triangular wave to generate parameter information generation triangular wave and be sent to signal transmitter unit, the signal transmitter unit is according to described three
Angle wave generates millimeter-wave signal and is issued by transmitting antenna array (11)；
The reflected millimeter-wave signal of blower to be measured is received by receiving antenna array (12), and is mentioned by signal transmitter unit
Take out the quadrature component Q and in-phase component I of reflected millimeter-wave signal；
The quadrature component Q and in-phase component I are amplified and be filtered, and according to treated quadrature component Q and same
The vibrational state of blower to be measured is calculated in phase component I.
6. a kind of data processing algorithm as claimed in claim 5, which is characterized in that according to treated quadrature component Q and same
The vibrational state of blower to be measured is calculated in phase component I method particularly includes:
The signal amplitude for defining reference signal is sR(n), wherein the time of the received millimeter-wave signal of n=1,2,3 ..., N, N
Acquisition node；
By the signal amplitude s of the reference signalR(n) it is compared, is obtained so that s with preset threshold TR(n) > T it is each when
Between acquisition node i, i=1,2 ..., N, the time acquisition node i be reflected millimeter-wave signal in each wave beam
Initial time node；
The starting point set N in each period in reflected millimeter-wave signal is obtained according to each initial time node iS
={ i1,i2,...iM, wherein iMFor the initial time node of m-th wave beam in reflected millimeter-wave signal, M is reflection
The sum of wave beam in millimeter-wave signal back；
It will reflect back into the in-phase component I and quadrature component of the initial time node of two wave beams adjacent in the millimeter-wave signal come
Q carries out difference operation and combines, and obtains the initial time node of two wave beams adjacent in reflected millimeter-wave signal
Phase change value d (r)=[sI(ir+1)-sI(ir)]+j[sQ(ir+1)-sQ(ir)], the phase change value is blower to be measured
Relative Vibration value, whereinR=1,2 ..., M-1；
The consecutive variations phase value d (r+ of two wave beams adjacent in reflected millimeter-wave signal is calculated according to d (r)
P)=[sI(ir+1+p)-sI(ir+p)]+j[sQ(ir+1+p)-sQ(ir+ p)], the consecutive variations phase value is blower to be measured
Continuous shaking value, wherein p is the number for the timing node for including in each wave beam in reflected millimeter-wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074793.4A CN109883535A (en) | 2019-01-25 | 2019-01-25 | A kind of vibration measurement device and method based on millimeter wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074793.4A CN109883535A (en) | 2019-01-25 | 2019-01-25 | A kind of vibration measurement device and method based on millimeter wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109883535A true CN109883535A (en) | 2019-06-14 |
Family
ID=66926943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910074793.4A Pending CN109883535A (en) | 2019-01-25 | 2019-01-25 | A kind of vibration measurement device and method based on millimeter wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109883535A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220586A (en) * | 2019-06-19 | 2019-09-10 | 清华大学 | Vibration monitoring method and system based on millimeter wave |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140128748A1 (en) * | 2010-05-17 | 2014-05-08 | National Sun Yat-Sen University | Motion/vibration sensor |
| CN104076352A (en) * | 2014-06-27 | 2014-10-01 | 电子科技大学 | Low-interception speed measurement method and radar device |
| CN104459683A (en) * | 2014-12-12 | 2015-03-25 | 重庆大学 | Multi-target displacement high-accuracy measurement method and system based on microwave radar |
| CN204331053U (en) * | 2015-01-07 | 2015-05-13 | 安徽启路达光电科技有限公司 | A kind of bottled dangerous liquid detection system based on radar sensor |
| CN107358776A (en) * | 2017-08-23 | 2017-11-17 | 苏州豪米波技术有限公司 | Heartbeat detection radar system |
| CN107991672A (en) * | 2016-10-26 | 2018-05-04 | 上海雪狸传感技术有限公司 | A kind of shallow surface penetrating radar imaging system |
-
2019
- 2019-01-25 CN CN201910074793.4A patent/CN109883535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140128748A1 (en) * | 2010-05-17 | 2014-05-08 | National Sun Yat-Sen University | Motion/vibration sensor |
| CN104076352A (en) * | 2014-06-27 | 2014-10-01 | 电子科技大学 | Low-interception speed measurement method and radar device |
| CN104459683A (en) * | 2014-12-12 | 2015-03-25 | 重庆大学 | Multi-target displacement high-accuracy measurement method and system based on microwave radar |
| CN204331053U (en) * | 2015-01-07 | 2015-05-13 | 安徽启路达光电科技有限公司 | A kind of bottled dangerous liquid detection system based on radar sensor |
| CN107991672A (en) * | 2016-10-26 | 2018-05-04 | 上海雪狸传感技术有限公司 | A kind of shallow surface penetrating radar imaging system |
| CN107358776A (en) * | 2017-08-23 | 2017-11-17 | 苏州豪米波技术有限公司 | Heartbeat detection radar system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220586A (en) * | 2019-06-19 | 2019-09-10 | 清华大学 | Vibration monitoring method and system based on millimeter wave |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2902799B1 (en) | Doppler radar test system | |
| CN101706459B (en) | Microwave radar moisture sensor | |
| CN102741563A (en) | Method and device for determining the position of a piston of a piston cylinder using microwaves | |
| CN105973943B (en) | A kind of absorbing material traveling wave rejection test device and method | |
| US20170031006A1 (en) | Radio frequency metal/ceramic blade/tooth vector analysis | |
| EP3308149A1 (en) | Sensor for non-destructive characterization of objects | |
| CN102830395A (en) | High-precision phase type microwave distance measuring device and method | |
| KR102116136B1 (en) | Active Radar Target Simulating Apparatus having multiple Antennas | |
| CN108072872A (en) | Information extracting device, article detection apparatus | |
| CN109883535A (en) | A kind of vibration measurement device and method based on millimeter wave | |
| CN104977311A (en) | Radar type microwave water measuring apparatus | |
| CN104977312A (en) | Test method of radar type microwave water measuring apparatus | |
| CN106872490A (en) | Moisture content tester based on radar | |
| US9188477B2 (en) | Radar system and method for providing information on movements of object's surface | |
| TWI445994B (en) | Simulation of variable distance and velocity target and its method | |
| CN108919273A (en) | A kind of distance detection system and method | |
| US2467455A (en) | Radio speed and distance indicator | |
| JP3484995B2 (en) | Instantaneous passive distance measuring device | |
| CN113009432B (en) | Method, device and equipment for improving measurement accuracy and target detection accuracy | |
| CN110471053B (en) | Variable frequency distance measuring device | |
| RU2446407C1 (en) | Method to detect area of power transmission and communication lines damage and device for its realisation | |
| RU2569581C2 (en) | Microwave single-channel radio interferometer with waveguide probing path | |
| RU2727267C1 (en) | Method of measuring range under water at arbitrary position in horizontal plane longitudinal axis of receiving frame magnetic antenna | |
| CN110954579B (en) | Fruit and vegetable component content measuring method and system | |
| CN113075657B (en) | Method and device for testing height of scattering source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20211231 |