CN201646712U - Dynamic detection device of portable brake performance tester - Google Patents
Dynamic detection device of portable brake performance tester Download PDFInfo
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- CN201646712U CN201646712U CN2010201332980U CN201020133298U CN201646712U CN 201646712 U CN201646712 U CN 201646712U CN 2010201332980 U CN2010201332980 U CN 2010201332980U CN 201020133298 U CN201020133298 U CN 201020133298U CN 201646712 U CN201646712 U CN 201646712U
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Abstract
The utility model relates to the detection field of brake performance testers and discloses a dynamic detection device of a portable brake performance tester. The dynamic detection device comprises a CPU (Central Processing Unit) main control unit, a signal acquisition processing module, a storage module, a display module and a pedal switch, wherein the CPU main control unit is respectively connected with the signal acquisition processing module, the storage module, the display module and the pedal switch; and the signal acquisition processing module receives a radio frequency signal of a GPS (Global Positioning System) satellite and sends the signal to the CPU main control unit. The utility model has the benefits that data are measured with the Doppler frequency shift effect by adopting the GPS technology; and the method and the device are not interfered by weather and environment factors, have high detection precision and convenience in installation and use, and meanwhile, greatly improve speed measurement ranges and precisions, distance measurement ranges and precisions and time measurement precisions.
Description
Technical field
The utility model relates to the brake performance tester detection range, particularly a kind of portable brake performance tester dynamic property detecting device based on GPS.
Background technology
The brake efficiency of self-propelled vehicle is meant that on fair running road surface automobile is braked the ability of stopping with certain initial velocity, and it is the most basic critical for the evaluation of deceleration and stopping performance.Along with the fast development of China's automotive industry, the traffic accident total amount is in rising trend.The quality of vehicle braking performances will directly have influence on the safety of driving, and therefore, the portable brake performance tester that is used for the automobile brake perfrmance detection arises at the historic moment.Portable brake performance tester is as the special-purpose metrical instrument of measuring MFDD (mean deceleration that fully sends), and static index and method of inspection realize easily that all dynamic indicator and method of inspection operability are relatively poor in himself value accuracy.At present, when the dynamic indicator to portable brake performance tester detected, many employings detected based on the sensor of optical detection principle.When detecting as proving ground test out of doors, it is comparatively heavy to hang over the outer sensor based on optical detection principle of car body, is difficult to secure fixation, and safety and the stability during acceleration and deceleration is difficult for ensureing suddenly; The testing tool of photovoltaic principals is had relatively high expectations to road conditions, and weather and condition of road surface can have a strong impact on data stability, and therefore, the feasibility of described method of inspection is relatively poor.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of portable brake performance tester device for dynamically detecting, solve the problem of dynamic indicator and method of inspection poor operability in the present portable brake performance tester testing process, reach its purpose that accuracy, safety and stability are protected in testing process.
The technical scheme that the prior art problem that solves the utility model is adopted is: design and make a kind of portable brake performance tester device for dynamically detecting, comprise CPU main control unit, signal acquisition process module, memory module, display module and pedal switch; Described CPU main control unit is connected with described signal acquisition process module, memory module, display module and pedal switch respectively; Described signal acquisition process module receives the radiofrequency signal of gps satellite and imports signal into described CPU main control unit; Described memory module is used to store the braking performance test data of described signal acquisition process module output; Described display module is used for the demonstration of data; Described pedal switch also is connected on the brake pedal of mobile running gear.
The utility model further improves: described signal acquisition process module is by gps antenna, and inductor and advance signal treater are formed; Described gps antenna receives the gps satellite radiofrequency signal and it is sent in the described inductor; Described inductor is contactless speed parameter and location parameter inductor, and described inductor is made up of radio-frequency front-end and correlator, and described radio-frequency front-end is finished acquisition of signal and processing, and described correlator is finished the tracking and the locking of signal.
The utility model further improves: described display module is connected with described CPU main control unit by the parallel port, and described CPU main control unit converts the impulse singla of described signal acquisition process module to real-time speed and operating range value after treatment and shows by display module; Described braking performance test data comprise initial speed at brake application, stopping distance, MFDD, coordinated time, mean deceleration and braking time value.
The utility model further improves: described portable brake performance tester device for dynamically detecting also comprises button and print module; Described button and print module are connected with described CPU main control unit respectively.
The utility model further improves: described portable brake performance tester device for dynamically detecting also comprises wireless transport module; Described wireless transport module is used for the data message of described CPU main control unit is uploaded to master server so that analyze and handle.
The utility model further improves: described gps antenna is adsorbed on the mobile running gear by magnetic base.
The beneficial effects of the utility model are: by adopting the GPS technology, utilize Doppler effect to carry out DATA REASONING, this device is not subjected to the interference of weather environment factor, and the accuracy of detection height is easy to install; Simultaneously, velocity measurement scope, velocity measurement precision, range observation scope, range measurement accuracy and time measurement precision have been improved greatly.
Description of drawings
Fig. 1 is the detection scheme drawing of the utility model portable brake performance tester dynamic testing method.
Fig. 2 is the utility model portable brake performance tester device for dynamically detecting scheme drawing.
Fig. 3 is the utility model portable brake performance tester device for dynamically detecting signal acquisition process module connection diagram.
Fig. 4 is the utility model portable brake performance tester device for dynamically detecting button and print module connection diagram.
Fig. 5 is the utility model portable brake performance tester device for dynamically detecting memory module connection diagram.
Fig. 6 is the utility model portable brake performance tester device for dynamically detecting wireless transport module connection diagram.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
A kind of portable brake performance tester device for dynamically detecting as Fig. 2, comprises CPU main control unit 1, signal acquisition process module 2, memory module 4, display module 6, pedal switch 3 and wireless transport module 5; Described CPU main control unit 1 is connected with described signal acquisition process module 2, memory module 4, display module 6, pedal switch 3 and wireless transport module 5 respectively; Described signal acquisition process module 2 receives the radiofrequency signal of gps satellite and imports signal into described CPU main control unit 1; Described memory module 4 is used to store the braking performance test data of described signal acquisition process module 2 outputs; Described display module 6 is used for the demonstration of data; Described wireless transport module 5 is used for the data message of described CPU main control unit 1 is uploaded to master server so that analyze and handle; Described pedal switch also is connected on the brake pedal of mobile running gear.
As Fig. 3, described signal acquisition process module is by gps antenna 22, and inductor 23 and advance signal treater are formed; Described gps antenna 22 receives the gps satellite radiofrequency signal and it is sent in the described inductor 23; Described inductor is contactless speed parameter and location parameter inductor, and described inductor is made up of radio-frequency front-end and correlator, and described radio-frequency front-end is finished acquisition of signal and processing, and described correlator is finished the tracking and the locking of signal.Wherein, inductor is the RLVB20SPS inductor, and the external Car antnna receives the radiofrequency signal from gps satellite, and it receives as " radio receiver ", the broadcasting C/A coded signal of demodulation of satellite.And it is sent into the RLVB20SPS inductor.RLVB20SPS is a kind of contactless speed and position sensor based on GPS, and it mainly is made up of radio-frequency front-end, correlator, is the basis of this device acquisition of signal and processing, and the quality of its signal conditioning directly influences the performance of this utility model test; Correlator is mainly finished the tracking and the locking of signal.The RLVB20SPS inductor has numeral, simulation and the output of CAN bus.The numeral output and the output of CAN bus of inductor have been selected in this device for use.The signal of digital port output is sent into the advance signal processing section, and the advance signal processing section is made up of LM393 and peripheral circuit.The in-phase end that digital signal is sent into comparator LM393 converts the 5V impulse singla to, and the impulse singla after the conversion is sent into CPU main control unit 1.
Described display module 6 is connected with described CPU main control unit 1 by the parallel port, and described CPU main control unit 1 converts the impulse singla of described signal acquisition process module 2 to real-time speed and operating range value after treatment and shows by display module 6; Described braking performance test data comprise initial speed at brake application, stopping distance, MFDD, coordinated time, mean deceleration and braking time value.
Described portable brake performance tester device for dynamically detecting also comprises button and print module 78; Described button and print module 78 are connected with described CPU main control unit 1 respectively.
In one embodiment, CPU main control unit 1 is selected C8051F062 for use, C8051F series monolithic and 8051 is compatible fully in instruction, performance is higher than 8051 micro controller systems of standard far away, in the sheet except having whole peripheral hardwares of 8052. can pass through port arrangement, connecting the equipment with interfaces such as SPI and CAN buses, expanded abundant peripheral hardware, is a kind of genuine SOC.What impulse singla was sent into is the P10 mouth of micro controller system, and this mouth is configured to the edge and triggers trap mode, the impulse singla of input is converted after treatment to the real-time speed and the operating range of vehicle.In the test set up procedure, micro controller system is delivered to real-time velocity amplitude on the liquid crystal display and is shown.Liquid crystal display is selected 124 * 64 lattice lcd for use, is connected with micro controller system by the parallel port, sees Fig. 4.
Fig. 5 and for example, the on-off signal of foot-operated switch is sent into the P6.4 mouth of micro controller system, when micro controller system detects this pin low level is arranged, judges that braking procedure begins.In braking procedure, micro controller system is sent into sensor in the memory module of being made up of SD card and peripheral circuit through position, car speed, orientation, acceleration/accel and the time of the output of CAN bus and is stored by spi bus.And memory module can be the SD card, and operating personal can be read data among the SD by card reader, so that the follow-up data analysis.
As Fig. 6,, added the GPRS wireless transport module in the device in order to alleviate testing staff's data handing.The GPRS wireless transport module comprises SIM and GPRS transceiver module.The GPRS transceiver module is selected the BENQ M22 of Taiwan Siemens AG for use, and this module is 9,00/,180,0/1,900 3 industrial modules frequently of band ICP/IP protocol and since this module embedded ICP/IP protocol, the requirement to the total system hardware and software reduces greatly like this.Utilize the serial ports of micro controller system to be connected, and the data that record are sent to the specified server address by way of short messages with BENQ M22GPRS module.After server receives data, but the automatically generated data form.Also the result in the detected equipment can be imported in the check implement, check implement is with one and send to server host, has alleviated the work of operator's follow-up data arrangement.The result who records can also print by mini-printer.Mini-printer and micro controller system carry out data transmission by the parallel port.
In practice, generally adopting the automobile effect to move running gear comes portable brake performance tester is carried out detection of dynamic.For adopting the detection scheme drawing of GPS technology, gps antenna is placed car outer (antenna of magnetic base can be adsorbed on roof) as Fig. 1, the foot-operated switch of foot-operated switch and tested equipment together is connected on the automobile brake pedal.When automotive operation, can measure kinematic velocity in real time, if step on brake pedal, just note stopping distance in the lump.Because what adopt is the GPS technology, utilizes Doppler effect to carry out DATA REASONING, therefore, is not subjected to the interference of extraneous weather environment factor, the accuracy of detection height is easy to install.The velocity measurement scope can reach: (0-200) km/h, and the velocity measurement precision can reach: ± 0.1km/h; The range observation scope can reach: (0-9999.99) m, and range measurement accuracy can reach: ± 0.05%, the time measurement precision can reach: ± 1ms.
Because portable brake performance tester is the proving ground test instrument that is used for detecting braking deceleration, its principle of work is to adopt " acceleration pick-up " as end instr, utilize related algorithm to obtain among the standard GB 7258-2004 " self-propelled vehicle safe in operation engineering factor ", automobile brake perfrmance is estimated parameters needed MFDD (mean deceleration that fully sends).The MFDD computing formula is suc as formula (1):
Known by formula (1), wish to get MFDD, just need know speed V0 and stopping distance Se and Sb, for this reason, we adopt the GPS Doppler technology to realize above-mentioned target.Receive the radio signal that satellite launching goes out with external antenna, because the position of satellite in the space is known, the ground motion object is if produce motion, then doppler shift effect can take place in the satellite radio signal of Jie Shouing, and principle can decomposite the frequency signal that is directly proportional with the ground motion object speed in view of the above.This signal is carried out frequency measurement, can obtain the speed of mobile,, can obtain the distance that mobile is passed by by signal is counted.
During actual detected, after the detecting device start, initial speed at brake application is set earlier and imports detected device numbering, the CPU main control unit receives the data message of being sent into by the signal acquisition process module in real time, judges whether the satellite number satisfies the test condition that surpasses four satellites, if do not satisfy, then show " waiting " in test interface (display module) upper right corner, when detecting the satellite number above four, the upper right corner shows " OK ", and this moment, the testing staff can carry out testing.CPU main control unit real-time judge current vehicle speed, when the speed of a motor vehicle equaled setting value, the CPU main control unit sent rhythmical buzzer by the control buzzer phone, and alert can begin to carry out braking performance test.After treating velocity-stabilization, suddenly touch on the brake.Braking procedure moves from pedal switch, the CPU main control unit is converted to real-time speed and distance with the signal of signal acquisition process module output, and position, car speed, orientation, acceleration/accel and the time of signal acquisition process module output in the braking procedure are sent into memory module.After braking procedure finishes, the CPU main control unit adopts algorithm that speed and the distance that obtains drawn initial speed at brake application, stopping distance, MFDD, coordinated time, mean deceleration and braking time behind data handing, these values are deposited in the memory module, and send in the master server by the GPRS wireless transport module.The shown data of result that this device is obtained and detected portable brake performance tester compare, and can realize measuring ability.
Memory module can be solid state hard disc or flash card, and in one embodiment, this memory module is the SD card.Operating personal can be read data among the SD by card reader, so that the follow-up data analysis.After braking procedure finished, micro controller system adopted the splines fitting algorithm the speed and the distance value that obtain, calculates initial speed at brake application, stopping distance, MFDD, coordinated time, mean deceleration and braking time behind data handing, and these values are deposited in the SD card.
When carrying out testing, only the antenna of carrying magnetic base must be adsorbed on roof and get final product, overcome traditional photoelectric detecting method, hang over the outer sensor heaviness of car body, be difficult to secure fixation, safety during acceleration and deceleration and stability are difficult for the shortcoming that ensures suddenly.Test the speed and count by the conversion of gps satellite signal Doppler frequency shift.Its operating voltage is AC 220V ± 22V, 50Hz or DC12V; The velocity measurement scope is 0km/h-200km/h; The velocity measurement precision is ± 0.1km/h; The mileage measurement range is 0m-9999.99m; Mileage survey precision: ± 0.05%.Adopt the GPS Doppler technology, avoided the influence of weather and condition of road surface, realized the round-the-clock needs of carrying out testing testing result.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (6)
1. a portable brake performance tester device for dynamically detecting is characterized in that: comprise CPU main control unit (1), signal acquisition process module (2), memory module (4), display module (6) and pedal switch (3); Described CPU main control unit (1) is connected with described signal acquisition process module (2), memory module (4), display module (6) and pedal switch (3) respectively; Described signal acquisition process module (2) receives the radiofrequency signal of gps satellite and imports signal into described CPU main control unit (1); Described memory module (4) is used to store the braking performance test data of described signal acquisition process module (2) output; Described display module (6) is used for the demonstration of data; Described pedal switch (3) also is connected on the brake pedal of mobile running gear.
2. according to the described portable brake performance tester device for dynamically detecting of claim 1, it is characterized in that: described signal acquisition process module (2) is by gps antenna, and inductor and advance signal treater are formed; Described gps antenna receives the satellite RF signal and it is sent in the described inductor; Described inductor is contactless speed parameter and location parameter inductor, and described inductor is made up of radio-frequency front-end and correlator, and described radio-frequency front-end is finished acquisition of signal and processing, and described correlator is finished the tracking and the locking of signal.
3. according to the described portable brake performance tester device for dynamically detecting of claim 1, it is characterized in that: described display module (6) is connected with described CPU main control unit (1) by the parallel port, and described CPU main control unit (1) converts the impulse singla of described signal acquisition process module (2) to real-time speed and operating range value after treatment and shows by display module (6); Described braking performance test data comprise initial speed at brake application, stopping distance, MFDD, coordinated time, mean deceleration and braking time value.
4. according to the described portable brake performance tester device for dynamically detecting of claim 1, it is characterized in that: described portable brake performance tester device for dynamically detecting also comprises button and print module (7) (8); Described button and print module (7) (8) are connected with described CPU main control unit respectively.
5. according to the described portable brake performance tester device for dynamically detecting of claim 1, it is characterized in that: described portable brake performance tester device for dynamically detecting also comprises wireless transport module (5); Described wireless transport module (5) is used for the data message of described CPU main control unit (1) is uploaded to master server so that analyze and handle.
6. according to the described portable brake performance tester device for dynamically detecting of claim 1, it is characterized in that: described gps antenna is adsorbed on the mobile running gear by magnetic base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201332980U CN201646712U (en) | 2010-03-17 | 2010-03-17 | Dynamic detection device of portable brake performance tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201332980U CN201646712U (en) | 2010-03-17 | 2010-03-17 | Dynamic detection device of portable brake performance tester |
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| CN201646712U true CN201646712U (en) | 2010-11-24 |
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| CN2010201332980U Expired - Fee Related CN201646712U (en) | 2010-03-17 | 2010-03-17 | Dynamic detection device of portable brake performance tester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344369A (en) * | 2013-06-18 | 2013-10-09 | 南京理工大学 | Portable torque rotation speed tester |
| CN104890661A (en) * | 2015-06-30 | 2015-09-09 | 三一重机有限公司 | Hydraulic measurement system capable of accurately measuring braking distance and engineering machine |
| CN110567731A (en) * | 2019-08-15 | 2019-12-13 | 吉林大学 | double-rotation brake performance tester inspection bench |
-
2010
- 2010-03-17 CN CN2010201332980U patent/CN201646712U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344369A (en) * | 2013-06-18 | 2013-10-09 | 南京理工大学 | Portable torque rotation speed tester |
| CN103344369B (en) * | 2013-06-18 | 2015-04-22 | 南京理工大学 | Portable torque rotation speed tester |
| CN104890661A (en) * | 2015-06-30 | 2015-09-09 | 三一重机有限公司 | Hydraulic measurement system capable of accurately measuring braking distance and engineering machine |
| CN104890661B (en) * | 2015-06-30 | 2018-11-16 | 三一重机有限公司 | A kind of hydraulic test system and engineering machinery of precise measurement braking distance |
| CN110567731A (en) * | 2019-08-15 | 2019-12-13 | 吉林大学 | double-rotation brake performance tester inspection bench |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120317 |