CN206420791U - A kind of multi-frequency microwave detecting device for moisture content - Google Patents
A kind of multi-frequency microwave detecting device for moisture content Download PDFInfo
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- CN206420791U CN206420791U CN201720027922.0U CN201720027922U CN206420791U CN 206420791 U CN206420791 U CN 206420791U CN 201720027922 U CN201720027922 U CN 201720027922U CN 206420791 U CN206420791 U CN 206420791U
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Abstract
The utility model discloses a kind of multi-frequency microwave detecting device for moisture content, including high-frequency circuit board, high-frequency signal line, signal-processing board, seal, microwave antenna and antenna holder, microwave support and microwave antenna composition microwave probe, high-frequency circuit board and the microwave antenna are connected by the high-frequency signal line, the high-frequency signal line is sealed by the seal, in the microwave antenna immersion measured medium, the high-frequency circuit board is sealed in described device, the signal-processing board is arranged on the high-frequency circuit board, the seal is threadedly coupled with the microwave support, infusion epoxy resin is sealed, the seal and described device body and circuit board are adopted and are screwed；Using multi-frequency microwave detecting device for moisture content of the present utility model, the timesharing of high and low frequency signal is exported, and interval time can set from 1ms ~ 1s, and decay of the salinity to high-frequency signal will be less than low frequency signal, by the measurement of different frequency, the influence of salinity is eliminated.
Description
Technical field
The utility model is related to detection technique field, more particularly to a kind of multi-frequency microwave detecting device for moisture content.
Background technology
With the development of domestic economy and expanding day by day for city size, crude oil water content detection is petroleum industry more than one
Year an open question, many research institutions attempted the methods such as electrical conductivity method, capacitance method, rf attenuation and microwave resonance, all
It can not solve very well.Main cause is that oil composition is complicated, and it is low that salinity content has height to have, profit complex shape, there is oily bag
The variform such as water or oil-in-water.
Therefore a kind of new multi-frequency microwave detecting device for moisture content is needed to solve the above problems.
Utility model content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of multi-frequency microwave detecting device for moisture content energy
Enough meet the technical need of prior art.
A kind of multi-frequency microwave detecting device for moisture content, the multi-frequency microwave detecting device for moisture content include high-frequency circuit board,
High-frequency signal line, signal-processing board, seal, microwave antenna and antenna holder, microwave support and the microwave antenna composition are micro-
Ripple is popped one's head in, and the high-frequency circuit board and the microwave antenna are connected by the high-frequency signal line, and the high-frequency signal line is by institute
State in seal sealing, the microwave antenna immersion measured medium, the high-frequency circuit board is sealed in described device, the letter
Number process plate is arranged on the high-frequency circuit board, and the seal is threadedly coupled with the microwave support, infusion epoxy resin
Sealing, the seal and described device body and circuit board are adopted and are screwed.
Preferably, the microwave support uses PEEK, polyimides or polytetrafluoro material, and the microwave antenna uses copper
Material.
The technical solution of the utility model has the advantages that：
A kind of multi-frequency microwave detecting device for moisture content that the utility model is provided, is contained using multi-frequency microwave of the present utility model
Water rate detection means, high and low frequency signal timesharing output, interval time can set from 1ms ~ 1s, because salinity is to high frequency
The decay of signal will be less than low frequency signal, so by the microwave signal measurement of different frequency, eliminating the influence of salinity.
Brief description of the drawings
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Fig. 1 is a kind of system block diagram of multi-frequency microwave detecting device for moisture content of the utility model；
Fig. 2 is a kind of hardware structure diagram of multi-frequency microwave detecting device for moisture content of the utility model.
Embodiment
In order to have a clear understanding of the technical solution of the utility model, its detailed structure will be set forth in the description that follows.It is aobvious
So, simultaneously deficiency is limited to the specific details that those skilled in the art is familiar with for the specific execution of the utility model embodiment.This reality
It is described in detail as follows with new preferred embodiment, except these of detailed description implement exception, there can also be other embodiment party
Formula.
The utility model is described in further details with reference to the accompanying drawings and examples.
Structure chart 1- Fig. 2, the present embodiment proposes a kind of multi-frequency microwave detecting device for moisture content, and the multi-frequency microwave is aqueous
Rate detection means include microcontroller circuit, wideband power amplifer, wideband high-frequency work(point, amplitude discrimination phase discriminator, signal amplifier,
Communicating circuit and voltage controlled oscillator, the microcontroller circuit output voltage control signal, control voltage controlled oscillator output
300MHz ~ 2.4GHz variable frequency signal, after wideband power amplifer and wideband high-frequency power divider, is output to all the way
Antenna, another road is output to broadband amplitude discrimination phase discriminator, and the signal returned from antenna, which is also transported to broadband amplitude discrimination phase discriminator, to be compared
Compared with the signal of the amplitude discrimination phase discriminator output send microcontroller circuit sampling processing, and obtained data send defeated to communicating circuit
Go out.
The multi-frequency microwave detecting device for moisture content includes high-frequency circuit board 1, high-frequency signal line 2, signal-processing board 3, close
Sealing 4, microwave antenna 5 and antenna holder 6, the microwave support and microwave antenna constitute microwave probe, the high-frequency circuit board
Connected with the microwave antenna by the high-frequency signal line, the high-frequency signal line is sealed by the seal, the microwave
In antenna immersion measured medium, the high-frequency circuit board is sealed in described device, and the signal-processing board is arranged on the height
On frequency circuit plate, the seal is threadedly coupled with the microwave support, infusion epoxy resin sealing, the seal and described
Device body and circuit board, which are adopted, to be screwed.
The microwave support uses PEEK, polyimides or polytetrafluoro material, and the microwave antenna uses copper material；
Common antenna, timesharing measurement, by microcontroller circuit control, sampling and processing：Decay of the salinity to high-frequency signal will be less than
Low frequency signal, therefore by the measurement of different frequency, to eliminate the influence of salinity.
The multi-frequency microwave detecting device for moisture content has following measuring principle：The wire transmission of microwave is by transmission medium shadow
Ring.When microwave is transmitted in different media, the speed of transmission is different.The aerial transmission speed of microwave is higher than
Oil, is more much higher than water.When the frequency of microwave immobilizes, speed is faster, and wavelength is shorter, therefore in same transmission range
On, the phase shift transmission that microwave occurs in atmosphere is greater than oil, even larger than water, can thus be come by detecting the change of phase shift
Detect the moisture content in oil mixing with water medium.
When there is high salinity in measured medium, the decay of microwave transmission signal intensity can be produced, is contained so as to have influence on
The detection of water rate, this influence can be obtained by detecting microwave signature attenuation amplitude.
Because amplitude discrimination phase discriminator can only carry out 180 degree or 360 degree of phase demodulation, if so local oscillation signal and comparison signal
Phase difference exceeded 180 degree or 360 degree, then can be erroneously interpreted as the phase difference within 180 degree.Fixed in antenna length
In the case of, if low frequency signal there occurs the phase shift of 180 degree, under square one, high-frequency signal then can well beyond 180 degree,
The phase shift of actual generation can not thus be judged.
Therefore, on the choice of frequencies, high frequency can be selected to the multiple for low frequency.For example low frequency selection 300MHz, then high
Frequency selects 1.2G, is 4 times of low frequency.Low frequency signal produces the phase shift of 180 degree on antenna, and high frequency can then produce 720 degree of phase shift.
The phase shift measured during low frequency measurement can determine the general scope of antenna phase shift, so as to determine precision by the phase shift of high frequency measurement.
For example the phase shift range of low frequency and high frequency measurement is 180 degree, and low frequency measurement is X, and high frequency measurement is Y, actual high-frequency phase shift
For Z, then under the corresponding relation of low-and high-frequency measurement range is：
0 degree of If<=X<45 degree, Z=Y；
45 degree of If<=X<90 degree, Z=Y+45 degree；
90 degree of If<=X<135 degree, Z=Y+90 degree；
135 degree of If<=X<180 degree, Z=Y+135 degree；
In the case of same sampling precision, phase measurement accuracy than originally improves 4 times.
A kind of multi-frequency microwave detecting device for moisture content that the utility model is provided, is contained using multi-frequency microwave of the present utility model
Water rate detection means, high and low frequency signal timesharing output, interval time can set from 1ms ~ 1s, because salinity is to high frequency
The decay of signal will be less than low frequency signal, so by the microwave signal measurement of different frequency, eliminating the influence of salinity.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than it is limited
System, although the utility model is described in detail with reference to above-described embodiment, those of ordinary skill in the art are still
Embodiment of the present utility model can be modified or equivalent substitution, these without departing from the utility model spirit and
Any modification of scope or equivalent substitution, are applying within pending claims.
Claims (2)
1. a kind of multi-frequency microwave detecting device for moisture content, it is characterised in that the multi-frequency microwave detecting device for moisture content includes height
Frequency circuit plate, high-frequency signal line, signal-processing board, seal, microwave antenna and antenna holder, the microwave support and microwave day
Line constitutes microwave probe, and the high-frequency circuit board and the microwave antenna are connected by the high-frequency signal line, the high frequency letter
Number line is sealed by the seal, and in the microwave antenna immersion measured medium, the high-frequency circuit board is sealed in described device
Interior, the signal-processing board is arranged on the high-frequency circuit board, and the seal is threadedly coupled with the microwave support, perfusion
Epoxy resin is sealed, and the seal and described device body and circuit board are adopted and be screwed.
2. multi-frequency microwave detecting device for moisture content according to claim 1, it is characterised in that the microwave support is used
PEEK, polyimides or polytetrafluoro material, the microwave antenna use copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720027922.0U CN206420791U (en) | 2017-01-11 | 2017-01-11 | A kind of multi-frequency microwave detecting device for moisture content |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720027922.0U CN206420791U (en) | 2017-01-11 | 2017-01-11 | A kind of multi-frequency microwave detecting device for moisture content |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706670A (en) * | 2017-01-11 | 2017-05-24 | 江苏麦赫物联网科技有限公司 | Multifrequency microwave detecting system for moisture content |
| CN109322655A (en) * | 2018-09-05 | 2019-02-12 | 深圳市联恒星科技有限公司 | A kind of microwave hydro rate detection device and method based on neural network Yu double frequency difference model |
| CN112748130A (en) * | 2020-12-23 | 2021-05-04 | 中山艾尚智同信息科技有限公司 | Main structure of aggregate moisture content rapid determination sensor based on microwave method |
-
2017
- 2017-01-11 CN CN201720027922.0U patent/CN206420791U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706670A (en) * | 2017-01-11 | 2017-05-24 | 江苏麦赫物联网科技有限公司 | Multifrequency microwave detecting system for moisture content |
| CN106706670B (en) * | 2017-01-11 | 2024-03-19 | 江苏麦赫物联网科技有限公司 | Multi-frequency microwave water content detection system |
| CN109322655A (en) * | 2018-09-05 | 2019-02-12 | 深圳市联恒星科技有限公司 | A kind of microwave hydro rate detection device and method based on neural network Yu double frequency difference model |
| CN109322655B (en) * | 2018-09-05 | 2024-04-09 | 深圳市联恒星科技有限公司 | Microwave water content detection device and method based on neural network and dual-frequency differential model |
| CN112748130A (en) * | 2020-12-23 | 2021-05-04 | 中山艾尚智同信息科技有限公司 | Main structure of aggregate moisture content rapid determination sensor based on microwave method |
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