CN87202020U - Microwave velocity-measuring radar device - Google Patents
Microwave velocity-measuring radar device Download PDFInfo
- Publication number
- CN87202020U CN87202020U CN 87202020 CN87202020U CN87202020U CN 87202020 U CN87202020 U CN 87202020U CN 87202020 CN87202020 CN 87202020 CN 87202020 U CN87202020 U CN 87202020U CN 87202020 U CN87202020 U CN 87202020U
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- CN
- China
- Prior art keywords
- circuit
- measuring device
- speed measuring
- microwave
- logical operation
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- 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.)
- Ceased
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Abstract
The utility model relates to a microwave radar testing apparatus, which is used for testing the speeds and trackslip rates of automobiles, tractors or agricultural implements. The microwave radar testing apparatus is composed of a microwave sensor, a pre-amplifier, a time-base circuit, a logical operation circuit and a display circuit. The microwave radar testing apparatus is characterized in accurate testing precision, stable performance and convenient use.
Description
The utility model is a kind of microwave radar proving installation that is used for automobile, tractor or agricultural machinery and implement finding speed and slippage rate.
The microwave radar speed measuring device is the important topic of current domestic and international civilian research.
External testing the speed collision avoidance radar and microwave radar test the speed and calculate the experimental study of tractor slippage rate.
Domestic existing vehicle overspeed alarming radar installations, as the velocity radar of Yueyang, Anhui 4150 factories, range rate error is 3% in 40-100 kilometer/hour scope, mainly is suitable for measuring at a high speed.
Slippage rate is an important indicator of farm tractor power performance, and the size of slippage rate numerical value directly influences tractor-drawn efficient.In order accurately to measure the slippage rate of tractor driving wheel, Chinese scholars has worked out various assay methods, mostly is the contact type measurement mode, owing to be subjected to the influence of factors such as pavement conditions or inflation of tire pressure, is difficult to reach the actual measurement effect.
It is a kind of contactless that the purpose of this utility model is to provide, and adapts to the microwave radar speed measuring device of low speed, adopts the CMOS integrated circuit to make it measure accurate, stable performance, easy to use.
The utility model is made up of microwave remote sensor, pre-amplification circuit, time base circuit, logical operation circuit and display circuit.
This speed measuring device is according to the Doppler effect principle design.Be further described below in conjunction with accompanying drawing.
Accompanying drawing is a microwave radar speed measuring device block diagram.
One, microwave remote sensor
Form by the solid state microwave oscillator of doing the emissive power source, isolator, Waveguide slot battle array electromagnetic horn, frequency mixer etc.
In order to reduce the interference of clutter, radar emission, accept antenna and use Waveguide slot battle array electromagnetic horn.Be that a kind of appropriate location on wave guide wall has and intersects the slit, make seaming and cutting cut the electric current on the wave guide wall and be energized, the semi-infinite space microwave radiation that the seam that is energized can be outside waveguide.
After the solid state microwave power source connect power supply, oscillation source produced microwave, was carried by waveguide through coupling, by slot electromagnetic horn directional transmissions, run into the moving target reflection, receive by same electromagnetic horn again, send frequency mixer and local frequency difference frequency to detect, be Doppler frequency signal.
Two, pre-amplification circuit
Be made up of level Four R-C coupling dividing potential drop amplifying circuit, the Doppler frequency signal after amplifying is calculated display device through the cable input.
Three, time base circuit
Form by crystal oscillating circuit, frequency dividing circuit and gating circuit.The control of this circuit can be directly with frequency number demonstrate with " kilometer/hour " be the velocity amplitude of unit, perhaps be the slippage rate value of unit with " % ".
Four, logical operation circuit
This circuit comprises subtraction circuit and division circuit.Job order is to subtract afterwards earlier to remove, and the signal that records can be converted into velocity amplitude and slippage rate value thus.Subtraction circuit adopts 4 C182 integrated chips, and division circuit also adopts 4 C182 integrated chips.
Five, display circuit
Be to constitute by counting, deposit, release sign indicating number.
Digital display adopts plate four fluorescent charactrons, and font is limpid in sight, and compact conformation is fit to field inspection and uses.Can distinguish display speed value and slippage rate, maximal rate is shown as 9999 kilometers/hour, 0-50 kilometer/hour of measuring speed scope, and (instantaneous 4) measure slippage rate scope 0-100%, (instantaneous 4), display cycle 0.6-1.5 is adjustable second.
The utility model is tested through field measurement, stable performance, reliable operation. Has advanced measurement mechanism easy to use, as to adapt to low speed.
Claims (5)
1, a kind of microwave radar speed measuring device, form by microwave remote sensor, pre-amplification circuit, time base circuit, logical operation circuit and display circuit, it is characterized in that adopting the logic control computing circuit of narrow beam waveguide slot array (antenna) electromagnetic horn and cmos digital integrated chip C182 design.
2, speed measuring device according to claim 1 is characterized in that logical operation circuit comprises subtraction circuit and division circuit.
3, speed measuring device according to claim 2 is characterized in that subtraction circuit adopts 4 C182 integrated chips, and division circuit adopts 4 C182 integrated chips.
4, speed measuring device according to claim 1 is characterized in that time base circuit is made up of crystal oscillating circuit, frequency dividing circuit and gating circuit.
5, speed measuring device according to claim 1 is characterized in that pre-amplification circuit is made up of level Four R-C coupling dividing potential drop amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87202020 CN87202020U (en) | 1987-02-18 | 1987-02-18 | Microwave velocity-measuring radar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87202020 CN87202020U (en) | 1987-02-18 | 1987-02-18 | Microwave velocity-measuring radar device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87202020U true CN87202020U (en) | 1987-10-21 |
Family
ID=4818240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87202020 Ceased CN87202020U (en) | 1987-02-18 | 1987-02-18 | Microwave velocity-measuring radar device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87202020U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514746A (en) * | 2012-06-15 | 2014-01-15 | 深圳市金溢科技有限公司 | DSRC-based vehicle speed measuring method and device, and DSRC application system |
| CN109374315A (en) * | 2018-12-18 | 2019-02-22 | 中国科学院自动化研究所 | Acquisition methods, control method, system, the device of the instantaneous slippage rate of wheel of vehicle |
-
1987
- 1987-02-18 CN CN 87202020 patent/CN87202020U/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514746A (en) * | 2012-06-15 | 2014-01-15 | 深圳市金溢科技有限公司 | DSRC-based vehicle speed measuring method and device, and DSRC application system |
| CN103514746B (en) * | 2012-06-15 | 2016-12-21 | 深圳市金溢科技股份有限公司 | Vehicle speed measurement method based on DSRC, device and DSRC application system |
| CN109374315A (en) * | 2018-12-18 | 2019-02-22 | 中国科学院自动化研究所 | Acquisition methods, control method, system, the device of the instantaneous slippage rate of wheel of vehicle |
| CN109374315B (en) * | 2018-12-18 | 2019-09-10 | 中国科学院自动化研究所 | Acquisition methods, control method, system, the device of the instantaneous slippage rate of wheel of vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right | ||
| CE01 | Termination of patent right |
Termination date: 19880427 |