CN201364385Y - Simulation tester for radar speedometer - Google Patents
Simulation tester for radar speedometer Download PDFInfo
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- CN201364385Y CN201364385Y CNU2009200525979U CN200920052597U CN201364385Y CN 201364385 Y CN201364385 Y CN 201364385Y CN U2009200525979 U CNU2009200525979 U CN U2009200525979U CN 200920052597 U CN200920052597 U CN 200920052597U CN 201364385 Y CN201364385 Y CN 201364385Y
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Abstract
The utility model relates to the field of testing equipment for electronic instruments, and aims to solve the problem of overcoming the defect in the prior art and providing a simulation tester for a radar speedometer with simple use and accurate test. The simulation tester structurally comprises a main singlechip, a liquid crystal display, a keyboard, a two-channel simulation frequency generator and a test channel, wherein the main singlechip is connected with the liquid crystal display, the keyboard and the two-channel simulation frequency generator; and the two-channel simulation frequency generator is connected with the test channel. The utility model has high frequency accuracy and stability, and can generate two simulation vehicle frequency signals simultaneously. No computer or special-purpose DDS chip needs to be externally connected, and the singlechip can be controlled to generate Doppler frequency values, speed values and voltage values corresponding to radar frequencies through the built-in main singlechip. The simulation tester for a radar speedometer does not need to be opened and adopts a soft correction mode.
Description
Technical field
The utility model relates to the calibration equipment field of electronic device, a kind of radar meter simulation calibrating instrument of saying so more specifically.
Background technology
The radar meter calibrating installation is the special-purpose calibrating installation of developing for the speed of calibrating radar meter specially, it can be according to the speed of moving target and the speed of displacement, the simulation Doppler frequency, be used in metering validation activity and radar meter carried out measurement verification work in accordance with the law, also can be used for traffic police department and regularly the radar meter in usefulness is carried out Intermediate Checks usefulness.
The shortcoming of existing calibrating installation:
A. the frequency stability of simulating the Doppler frequency signal generator is relatively poor, has calibrating installation common crystal oscillator or the RC oscillators of adopting to produce the simulation Doppler frequency more, so less stable.Manual adjustments is adopted in output, and calibrating efficient is low.
B. simulate the output of Doppler frequency signal source and be shown as the single-frequency value, kilometer numerical value useless shows that it is not directly perceived to set check point in the verification process, needs to calculate or the conversion of tabling look-up inconvenient operation, inefficiency.
C., the function of the intrinsic microwave frequency value of input radar directly not being set, thereby when tested radar natural frequency is outside the frequency of rules regulation, not having ready-made frequency/speed table of comparisons to look in the rules, is that calibration operation is subjected to significant limitation.
D. Doppler frequency value and velocity amplitude must be by external computer installations, and be very inconvenient for the calibrating of hard-wired radar meter and automobile overspeed automatic checkout system.
E. manual adjustments output signal amplitude must be torn Gai Caineng open and be adjusted, and ease for use is very poor.
The utility model content
Technical problem to be solved in the utility model is to overcome the defective of prior art, provide a kind of use simple, examine and determine the calibrating instrument of radar meter simulation accurately.
This patent is achieved through the following technical solutions above-mentioned purpose.
The radar meter simulation calibrating instrument that the utility model is designed, its structure comprises host scm, LCD, keyboard, binary channels analog frequency maker and test channel, described host scm is connected with LCD, keyboard, binary channels analog frequency maker, and binary channels analog frequency maker connects test channel.
Its concrete structure is that described binary channels analog frequency maker comprises that two analog frequencies generate passage and two output feedback channels, and above-mentioned analog frequency generates passage and connects same crystal oscillator.Analog frequency generates passage and comprises Direct Digital Frequency Synthesizers (DDS), multiplication DA converter and the power amplifier that connects successively, and power amplifier connects test channel.Described output feedback channel comprises pulse-width modulator, standard voltage source, voltage amplifier and full wave rectifier, two input ends of voltage amplifier are connected with the output terminal of standard voltage source and full wave rectifier, output terminal is connected with multiplication DA converter, the full wave rectifier input end connects power amplifier, and pulse-width modulator connects standard voltage source.
The utlity model has very high-frequency accuracy and stability, can produce two simulating vehicle frequency signals simultaneously, need not external computing machine and special-purpose DDS chip, produce Doppler frequency value, velocity amplitude, the magnitude of voltage of corresponding radar frequency correspondence with regard to may command from single-chip microcomputer by built-in host scm, the radar meter analog rate calibrating instrument of exempt to uncap " soft correction ".
The utility model compared with prior art has the following advantages:
1. radar meter analog rate calibrating instrument is formed by host scm with from single-chip simulation DDC direct synthesizer, the accuracy of frequency and degree of stability are by the crystal oscillator decision of using, so very high frequency accuracy and degree of stability, well beyond the requirement of national verification rules JJG528-2004.
2. the analog rate calibrating instrument need not external computing machine with related software, only need just can realize speed (km/h) by built-in host scm, and voltage (mV), radar frequency of operation (MHz), frequency shift (FS) (MHz) shows that with screen working interface is directly perceived.
3. by the directly actuated keyboard of host scm, the radar meter of frequency of operation for (1～100) GHz can be set, thereby converse Doppler frequency value and velocity amplitude, even use the import radar meter of non-standard frequency also can examine and determine fast.
4. by the directly actuated keyboard of host scm, the amplitude of output signal also can directly be set, the accuracy of " soft correction " output voltage.
5. instrument both can use the 220V AC power, also can use (9～24) V direct supply, and work on the spot is easy to carry.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
Radar meter simulation calibrating instrument as shown in Figure 1, core comprises host scm 11, binary channels Direct Digital Frequency Synthesizers 21,22 from single-chip microcomputer 12 simulations, multiplication DA converter 41,42 from single-chip microcomputer 12 output conversions, the standard voltage source 81,82 of control output voltage signal, and the accurate full wave rectifier 61,62 and the accurate voltage amplifier 71,72 of output feedback usefulness.21,22 and two pulse-width modulators of two Direct Digital Frequency Synthesizers 31,32 constitute from single-chip microcomputer 12.Host scm 11 connects the keyboard 14 that can import verification parameters and can realize speed (km/h), voltage (mV), radar frequency of operation (MHz), the LCD 15 that frequency shift (FS) (MHz) shows with screen.
Wherein Direct Digital Frequency Synthesizers 21,22 connects multiplication DA converter 41,42 and two analog frequencies generations of power amplifier 51,52 formation passages; Pulse- width modulator 31,32 connects standard voltage source 81,82, and voltage amplifier 71,72 and full wave rectifier 61,62 form two output feedback channels.The input end of described voltage amplifier 71,72 is connected with the output terminal of standard voltage source 81,82 with full wave rectifier 61,62, and output terminal is connected with multiplication DA converter 41,42, and full wave rectifier 61,62 input ends connect power amplifier 51,52.Said structure forms binary channels analog frequency maker, connects test channel 9.
During use, the test channel 9 of calibrating instrument is aimed at radar meter 10, keyboard 14 and the LCD 15 controlled by host scm 11 just can directly be provided with the corresponding binary channels velocity amplitude of radar frequency, magnitude of voltage.Binary channels Direct Digital Frequency Synthesizers 21,22 from single-chip microcomputer 12 simulations outputs to multiplication DA converter 41,42, and through being emitted to radar 10 after power amplifier 51,52 amplifications.Connect standard voltage sources 81,82 by pulse- width modulator 31,32, two output feedback channels that voltage amplifier 71,72 and full wave rectifier 61,62 form can realize that the mode that output voltage passes through " soft correction " revises.This patent both can use the 220V electric main, also can directly use the vehicle-mounted direct supply of (9～24) V.
Claims (4)
1. a radar meter is simulated calibrating instrument, it is characterized in that comprising host scm, LCD, keyboard, binary channels analog frequency maker and test channel, described host scm is connected with LCD, keyboard, binary channels analog frequency maker, and binary channels analog frequency maker connects test channel.
2. radar meter simulation calibrating instrument according to claim 1 is characterized in that described binary channels analog frequency maker comprises that two analog frequencies generate passage and two output feedback channels, and above-mentioned analog frequency generates passage and connects same crystal oscillator.
3. radar meter simulation calibrating instrument according to claim 2 is characterized in that described analog frequency generates passage and comprises Direct Digital Frequency Synthesizers, multiplication DA converter and the power amplifier that connects successively, and power amplifier connects test channel.
4. radar meter simulation calibrating instrument according to claim 3, it is characterized in that described output feedback channel comprises pulse-width modulator, standard voltage source, voltage amplifier and full wave rectifier, two input ends of voltage amplifier are connected with the output terminal of standard voltage source and full wave rectifier, output terminal is connected with multiplication DA converter, the full wave rectifier input end connects power amplifier, and pulse-width modulator connects standard voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200525979U CN201364385Y (en) | 2009-03-13 | 2009-03-13 | Simulation tester for radar speedometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200525979U CN201364385Y (en) | 2009-03-13 | 2009-03-13 | Simulation tester for radar speedometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201364385Y true CN201364385Y (en) | 2009-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200525979U Expired - Lifetime CN201364385Y (en) | 2009-03-13 | 2009-03-13 | Simulation tester for radar speedometer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353593A (en) * | 2013-07-04 | 2013-10-16 | 合肥开泰工贸有限责任公司 | Multifunctional universal tester used for LTC radar |
| CN103558587A (en) * | 2013-10-12 | 2014-02-05 | 奇瑞汽车股份有限公司 | Radar auxiliary testing system and radar auxiliary testing method |
| CN103852752A (en) * | 2014-03-14 | 2014-06-11 | 北京川速微波科技有限公司 | Device and method for debugging speed measuring radar |
| CN104730501A (en) * | 2015-02-04 | 2015-06-24 | 江苏省计量科学研究院 | Motor vehicle radar speed measurement meter field simulation method and detection device |
| CN107748275A (en) * | 2017-11-07 | 2018-03-02 | 广东技术师范学院 | A kind of remotely correcting method for radar current meter erecting bed |
-
2009
- 2009-03-13 CN CNU2009200525979U patent/CN201364385Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353593A (en) * | 2013-07-04 | 2013-10-16 | 合肥开泰工贸有限责任公司 | Multifunctional universal tester used for LTC radar |
| CN103353593B (en) * | 2013-07-04 | 2015-04-01 | 合肥开泰工贸有限责任公司 | Multifunctional universal tester used for LTC radar |
| CN103558587A (en) * | 2013-10-12 | 2014-02-05 | 奇瑞汽车股份有限公司 | Radar auxiliary testing system and radar auxiliary testing method |
| CN103852752A (en) * | 2014-03-14 | 2014-06-11 | 北京川速微波科技有限公司 | Device and method for debugging speed measuring radar |
| CN104730501A (en) * | 2015-02-04 | 2015-06-24 | 江苏省计量科学研究院 | Motor vehicle radar speed measurement meter field simulation method and detection device |
| CN104730501B (en) * | 2015-02-04 | 2017-11-03 | 江苏省计量科学研究院 | Motor vehicle radar meter field simulation method and detection means |
| CN107748275A (en) * | 2017-11-07 | 2018-03-02 | 广东技术师范学院 | A kind of remotely correcting method for radar current meter erecting bed |
| CN107748275B (en) * | 2017-11-07 | 2019-09-06 | 广东技术师范学院 | A kind of remotely correcting method for radar current meter erecting bed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091216 |