CN2506496Y - Portable dynamic property test instrument for motor vehicle - Google Patents
Portable dynamic property test instrument for motor vehicle Download PDFInfo
- Publication number
- CN2506496Y CN2506496Y CN 01257972 CN01257972U CN2506496Y CN 2506496 Y CN2506496 Y CN 2506496Y CN 01257972 CN01257972 CN 01257972 CN 01257972 U CN01257972 U CN 01257972U CN 2506496 Y CN2506496 Y CN 2506496Y
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- measuring instrument
- dynamic characteristics
- chip microcomputer
- circuit
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Abstract
The utility model provides a portable dynamic property test instrument of a motor vehicle, which consists of an acceleration sensor, a signal amplification module, a signal filtering module, an A/D conversion module, a single-chip microcomputer systematic module and a power supply module. The acceleration sensor, the signal amplification module, the signal filtering module, the A/D conversion module are sequentially and electrically connected with the single-chip microcomputer systematic module. The power supply module is sequentially and electrically connected with the acceleration sensor, the signal amplification module, the signal filtering module, the A/D conversion module and the single-chip microcomputer systematic module simultaneously. The portable dynamic property test instrument of the motor vehicle has the advantages of small volume, light weight, low cost, convenient assembling, simple operation, fast testing speed and low requirement for the road, and can effectively test the field properties of the motor vehicle and obtain the accurate property parameters of the motor vehicle in a short time, and has very convenient using and wide ranges of application.
Description
(1) technical field
The utility model relates to proving installation, particularly a kind of portable automobile dynamic characteristics measuring instrument.
(2) background technology
In recent years, along with China's rapid economic development, the demand of power actuated vehicle is constantly increased, power actuated vehicle has become a big backbone industry of current society as a kind of traffic and transportation means.The good and bad direct relation of the quality of automobile product and its performance running car efficient and its usage economy; On the other hand, increasing traffic accident constitutes increasing threat over against the human life, and prevention and minimizing traffic accident have become an important topic.Self-propelled vehicle manufacture product design safety detection has obtained the extensive attention of each side and high speed development under this background.China has issued GB7258-1997 " self-propelled vehicle safe in operation engineering factor ", provides corresponding standard to every performance requriements of self-propelled vehicle.Safety and Performance Detection to power actuated vehicle mainly is to adopt intelligence instrument to detect on detection line at present, test result passed to carry out further analyzing and processing and the final testing result of printing on the microcomputer again.These check implements are heavy mostly, install complicatedly, cost an arm and a leg and are subjected to site influence very big, are inconvenient to carry, and are difficult to be applied to on-the-spot real-time detections such as traffic accident.
(3) summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of easy to use, portable automobile dynamic characteristics measuring instrument of not being subjected to place restriction is provided.
The purpose of this utility model realizes by following technical proposals: this portable automobile dynamic characteristics measuring instrument is made up of acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module, power module, acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module are electrically connected successively, and power module is electrically connected with acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module simultaneously.
Described acceleration pick-up includes elastic element, strain-gauge, change-over circuit, and strain-gauge is installed on the elastic element, and is electrically connected with change-over circuit.
The full-bridge circuit of described change-over circuit for connecting and composing by strain-gauge.
Described signal amplification module comprises preamplifying circuit and back level amplifying circuit, and preamplifying circuit is electrically connected with back level amplifying circuit.
Described back level amplifying circuit includes the potential device zeroing circuit.
Described Single Chip Microcomputer (SCM) system module comprises data handing submodule, serial ports submodule, display sub-module and keyboard submodule.
Described power module is for providing the power supply of the different voltage outputs of multichannel.
The principle of work of this portable automobile dynamic characteristics measuring instrument is: after this tester is installed on the self-propelled vehicle, acceleration pick-up can be tested the acceleration/accel of automobile and the acceleration/accel that changes is converted into the weak voltage signal of respective change, after the amplification of signal amplification module, signal filtering module filtered and A/D modular converter carry out the A/D conversion, become digital signal and pass to the Single Chip Microcomputer (SCM) system resume module, the result is transmitted on the microcomputer by interface in demonstration on the read-out and the survey data make further analyzing and processing at last.Utilize this portable automobile dynamic characteristics measuring instrument can measuring machine motor-car deceleration and stopping performance (initial speed of braking, braking distance, braking time, with braking acceleration-deceleration etc.) with and, acceleration capability (braked spot speed, pick-up time, accelerating travel, average acceleration) and carry out acceleration capability dynamic analysis etc.
The utility model has following advantage with respect to prior art: (1) this testing tool is the using vehicle dynam synthetically, kinematics, strain gauge technique, multi-disciplinary knowledge such as computer technology and signalling technique, highly integrated self-propelled vehicle braking performance test, acceleration capability test and etc. a plurality of functional modules, intelligent degree height; (2) this portable automobile dynamic characteristics measuring instrument can carry out the field performance detection to self-propelled vehicle effectively, obtain accurate self-propelled vehicle tractive performance parameter at the scene in short time, to the field staff performance of self-propelled vehicle being assessed provides the active data support, has greatly made things convenient for on-the-spot surveying work; (3) this portable automobile dynamic characteristics measuring instrument is a core with the Single Chip Microcomputer (SCM) system module, utilize Single Chip Microcomputer (SCM) system module programming flexible characteristic, realize complicated data handing and control, with respect to other hardware based non-programmable accelerometer, have greater flexibility and expandability and friendly man machine interface is provided, function expansibility is better, but also can be equipped with serial ports and microcomputer carries out communication, the net result surveyed and all dynamic date parameters are transferred to carry out analyzing and processing on the microcomputer, so that the performance of is surveyed power actuated vehicle is done further the assessment; (4) this portable automobile dynamic characteristics measuring instrument volume is little, in light weight, cost is low, easy for installation (can interior can installing in one minute, need not change any part on the car), easy and simple to handle, test speed fast (can finish test in 5 minutes) is to rto request low (the straight highway section of tens of rice gets final product).
(4) description of drawings
Fig. 1 is the structural representation of the utility model portable automobile dynamic characteristics measuring instrument.
(5) specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.But embodiment of the present utility model is not limited to this.
Embodiment
Fig. 1 has shown the concrete structure of the utility model portable automobile dynamic characteristics measuring instrument, as seen from Figure 1, this portable automobile dynamic characteristics measuring instrument is by acceleration pick-up, the signal amplification module, the signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module, power module is formed, acceleration pick-up, the signal amplification module, the signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module are electrically connected successively, power module while and acceleration pick-up, the signal amplification module, the signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module are electrically connected; Wherein acceleration pick-up includes elastic element, paper tinsel formula strain-gauge, change-over circuit, elastic element is made up of a constant strength beam and a cylindrical mass, one end and the support of constant strength beam are fixed together, mass then is fixed on the other end place of constant strength beam, stick paper tinsel formula strain-gauge symmetrically on the two sides of beam, make strain and constant strength beam make same strain variation.Then four strain-gaugies are connected into full-bridge circuit, when when producing acceleration/accel perpendicular to the constant strength beam in-plane, constant strength beam is stressed, strain-gauge is followed constant strength beam generation strain and is caused the strain resistor resistance to change, make electric bridge unbalance and output with the corresponding voltage of suffered acceleration/accel, the acceleration voltage signal that acceleration pick-up is exported is very faint, have only a few μ V between the tens μ V, this acceleration voltage is input to the signal amplification module, the signal amplification module includes preamplifying circuit and back level amplifying circuit, preamplifying circuit is electrically connected with back level amplifying circuit, preamplifying circuit provides main magnification factor, and back level amplifying circuit then plays a part to improve amplification performance.Preamplifying circuit employing temperature is floated the AD622 chip little, that the linearity good, reliability is high and is amplified, the chip that back level amplifying circuit adopts is OP07, back level amplifying circuit includes the potential device zeroing circuit, when adjusting institute measuring acceleration is zero, the amplifying circuit output circuit also is zero, improves survey precision; The chip that the signal filtering module adopts is OP07, and the signal filtering module can be carried out LPF to the voltage signal that has amplified, and the periodic vibration interfering signal elimination that degree of will speed up sensor is produced is to obtain stable acceleration change curve.By quick 12 successive comparison A/D chip AD574 analog voltage signal is converted to digital signal then, be sent on the single-chip microprocessor system module and be for further processing, single chip microcomputer adopts AT89C52, single-chip microprocessor system has keyboard, LED display and serial interface, can set Actuator Test Modes and parameter by keyboard, then with measured data display on LED display, or be sent on the microcomputer by serial ports and do further to analyze.Power module is used in combination 7815,7915,7809 and provides the output of the different voltage sources of multichannel with 7805 chips.
Claims (7)
1, a kind of portable automobile dynamic characteristics measuring instrument, it is characterized in that: form by acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module, power module, acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module are electrically connected successively, and power module is electrically connected with acceleration pick-up, signal amplification module, signal filtering module, A/D modular converter and Single Chip Microcomputer (SCM) system module simultaneously.
2, portable automobile dynamic characteristics measuring instrument according to claim 1, it is characterized in that: acceleration pick-up includes elastic element, strain-gauge, change-over circuit, and strain-gauge is installed on the elastic element, and is electrically connected with change-over circuit.
3, portable automobile dynamic characteristics measuring instrument according to claim 2 is characterized in that: the full-bridge circuit of change-over circuit for being connected and composed by strain-gauge.
4, portable automobile dynamic characteristics measuring instrument according to claim 1 is characterized in that: the signal amplification module comprises preamplifying circuit and back level amplifying circuit, and preamplifying circuit is electrically connected with back level amplifying circuit.
5, portable automobile dynamic characteristics measuring instrument according to claim 4 is characterized in that: described back level amplifying circuit includes the potential device zeroing circuit.
6, portable automobile dynamic characteristics measuring instrument according to claim 1 is characterized in that: described Single Chip Microcomputer (SCM) system module comprises data handing submodule, serial ports submodule, display sub-module and keyboard submodule.
7, portable automobile dynamic characteristics measuring instrument according to claim 1 is characterized in that: described power module is for providing the power supply of the different voltage outputs of multichannel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257972 CN2506496Y (en) | 2001-11-15 | 2001-11-15 | Portable dynamic property test instrument for motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01257972 CN2506496Y (en) | 2001-11-15 | 2001-11-15 | Portable dynamic property test instrument for motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2506496Y true CN2506496Y (en) | 2002-08-21 |
Family
ID=33666628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01257972 Expired - Fee Related CN2506496Y (en) | 2001-11-15 | 2001-11-15 | Portable dynamic property test instrument for motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2506496Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079319A (en) * | 2009-11-30 | 2011-06-01 | 同方威视技术股份有限公司 | Railway rockfall early warning system and method |
-
2001
- 2001-11-15 CN CN 01257972 patent/CN2506496Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079319A (en) * | 2009-11-30 | 2011-06-01 | 同方威视技术股份有限公司 | Railway rockfall early warning system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |