CN202305551U - Engine speed signal instrument for complete vehicle test - Google Patents
Engine speed signal instrument for complete vehicle test Download PDFInfo
- Publication number
- CN202305551U CN202305551U CN2011203736998U CN201120373699U CN202305551U CN 202305551 U CN202305551 U CN 202305551U CN 2011203736998 U CN2011203736998 U CN 2011203736998U CN 201120373699 U CN201120373699 U CN 201120373699U CN 202305551 U CN202305551 U CN 202305551U
- Authority
- CN
- China
- Prior art keywords
- signal
- chip
- speed signal
- chip microcomputer
- complete vehicle
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Engines (AREA)
Abstract
The utility model relates to an engine speed signal instrument for a complete vehicle test, which comprises a single chip, a signal collecting circuit and a signal output circuit, wherein the signal collecting circuit is composed of a CAN (Controller Area Network) transceiver; the RF0 and RF1 ends of the CAN transceiver are connected with homonymic ends of the single chip; the CANL and CANH ends of the CAN transceiver are connected with a CAN bus of an engine controller; the signal output circuit comprises a digital-to-analogue conversion chip, an operational amplifier and a voltage stabilizer; the input end of the digital-to-analogue conversion chip is connected with a data output port of the single chip; the operational amplifier is connected with a voltage follower; the input end of the operational amplifier is connected with an OUT end of the digital-to-analogue conversion chip; the output end of the operational amplifier is connected with an autopilot; and the voltage stabilizer is used for supplying a reference voltage to the digital-to-analogue conversion chip. An externally connected speed sensor is not arranged in the engine speed signal instrument and a speed signal is directly obtained from an engine, so that the engine speed signal instrument has the advantages of low cost, convenience in mounting, high measuring precision, and the like.
Description
Technical field
The utility model relates to a kind ofly changes in the hub long duration test process device that engine rotational speed signal is provided for robot pilot at car load, belongs to technical field of measurement and test.
Background technology
When carrying out the long duration test of car load commentaries on classics hub, automobile is controlled by robot pilot (drive robot), in process of the test, needs to use the engine speed meter to robot pilot engine rotational speed signal is provided, and this signal is the simulating signal of 0～10V.The Traditional engine velocity gauge generally all adopts the mode of external sensor to gather engine rotational speed signal, and its shortcoming is to need to adopt different sensor for different vehicle (like gasoline engine and diesel engine).And the installation of sensor, to change operation more loaded down with trivial details, brings inconvenience to surveying work, and sensor signal is subject to the interference of environmental factor (like temperature), and measuring error is bigger, therefore is necessary existing engine speed meter is improved.
The utility model content
The purpose of the utility model be to overcome prior art deficiency, a kind of easy for installation, engine rotational speed signal appearance that is used for complete vehicle test that measuring error is little is provided.
The said problem of the utility model realizes with following technical proposals:
A kind of engine rotational speed signal appearance that is used for complete vehicle test; Comprise single-chip microcomputer, signal acquisition circuit and signal output apparatus in the formation; Said signal acquisition circuit is made up of the CAN transceiver; The RF0 of said CAN transceiver is connected the CAN bus of its CANL and CANH termination engine controller with the RF1 end with the end of the same name of single-chip microcomputer; Said signal output apparatus comprises analog-digital chip, operational amplifier and voltage stabilizer; The input end of said analog-digital chip connects the data-out port of single-chip microcomputer; Said operational amplifier is connected into voltage follower, the OUT end of its input termination analog-digital chip, output termination robot pilot; Said voltage stabilizer is that analog-digital chip provides reference voltage.
The above-mentioned engine rotational speed signal appearance that is used for complete vehicle test also comprises button inputting circuits in the formation, said button inputting circuits comprises four keyswitches, and the switching signal of their output connects the INT1 of single-chip microcomputer～INT4 end respectively.
The above-mentioned engine rotational speed signal appearance that is used for complete vehicle test; Also comprise display circuit in the formation; Said display circuit is made up of display driver and charactron display, and the input end of said display driver connects the data-out port of single-chip microcomputer, and output terminal drives the charactron display.
The above-mentioned engine rotational speed signal appearance that is used for complete vehicle test, said signal acquisition circuit also comprises signal amplifier, the simulating signal of the input end sending and receiving engine speed table output of said signal amplifier, output terminal connects the IC8 end of single-chip microcomputer.
The above-mentioned engine rotational speed signal appearance that is used for complete vehicle test also comprises communication chip in the formation, the RF2/U1RX end of said communication chip and RF3/U1TX end connect the U1RX/RF2 end and the U1TX/RF3 end of single-chip microcomputer respectively, and T1out end and R1in connect host computer.
The above-mentioned engine rotational speed signal appearance that is used for complete vehicle test, said signal output apparatus is provided with two.
The utility model is not established external speed probe; But directly read engine rotational speed signal or obtain tach signal from engine speed indicator from engine controller through the CAN bus, so not only reduce cost of products, and eliminated the measuring error that causes by sensor; Enlarged the temperature range of velocity gauge operation; Improve performance of products, also simplified fitting operation simultaneously, very easy to use.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the electrical schematic diagram of the utility model.
Each label is among the figure: A-1, A-2, signal output apparatus; U1, single-chip microcomputer; U2, communication chip; U3, CAN transceiver; U4, signal amplifier; U5, analog-digital chip; U6, operational amplifier; U7, display driver; U8, voltage stabilizer; DS, charactron display; S1, S2, S3, S4, keyswitch.
Embodiment
Referring to Fig. 1, native system adopts two kinds of tach signal acquisition modes, promptly directly reads or gathers engine rotational speed signal from the engine instruments line from the CAN bus.Native system is resolved the CAN signal with MPC551 (CAN transceiver U3), resolves the CAN message with single-chip microcomputer U1.The input end of signal amplifier U4 inserts 0 to 1V simulation tach signal of engine speed indicator, and output terminal is 0 to 5V signal.
Because robot pilot has certain requirement to real-time and the precision of engine speed, so U1 adopts 16 single-chip microcomputer dsPIC30F6014A of Microchip company, and its inside is integrated DSP nuclear has powerful computing and data processing function.The acquisition applications of engine signal its input capture function, realized the real-time acquisition calculation process.
LED display driver U7 has adopted the IC7218 chip of U.S. letter company, saved a large amount of static show latch buffer circuit, also reduced the operation expense of dynamic demonstration to single-chip microcomputer U1, improved the service efficiency of single-chip microcomputer U1.
Single-chip microcomputer U1 is connected through the high precision D/A conversion chip MAX5312 (analog-digital chip U5) of SPI communication interface with U.S. letter company; REF195 (voltage stabilizer U8) is used to provide 10V high precision D/A conversion reference voltage, and the voltage follower that operational amplifier U6 constitutes is used for the output speed signal.Native system is provided with two signal output apparatus, the simulating signal of A-1 output 0～10V, the simulating signal of A-2 output 0～5V.
The effect of button inputting circuits is to be used for being provided with some concrete parameters, also can be used for later function expansion.
The course of work of the utility model is two kinds of patterns:
Pattern one, gather through the pulse tach signal of engine speed indicator.After the pulse signal input, through filtering, shaping and amplifying circuit U4, the pulse signal that signal is zoomed into 0-5V gets into single-chip microcomputer U1.Carry out the seizure collection of signal through single-chip microcomputer, calculate current rotating speed.Export the analog voltage signal of corresponding 0-10V (or 0-5V) then through digital-to-analog conversion U5, improve driving force through operational amplifier U6 again, realize the output application.Demonstrate the present engine rotating speed through display circuit U7 simultaneously.
Pattern two, carry out the engine rotational speed signal collection through the CAN bus.Signal input back gets into single-chip microcomputer through CAN transceiver U3, through single-chip microcomputer signal is analyzed and computing, obtains the current rotating speed of engine.Export the analog voltage signal of corresponding 0-10V (or 0-5V) then through digital-to-analog conversion U5, improve driving force through operational amplifier U6 again, realize the output application.Demonstrate the present engine rotating speed through display circuit U7 simultaneously.
Claims (6)
1. engine rotational speed signal appearance that is used for complete vehicle test; It is characterized in that; Comprise single-chip microcomputer (U1), signal acquisition circuit and signal output apparatus in the formation; Said signal acquisition circuit is made up of CAN transceiver (U3), and the RF0 of said CAN transceiver (U3) is connected the CAN bus of its CANL and CANH termination engine controller with the RF1 end with the end of the same name of single-chip microcomputer (U1); Said signal output apparatus comprises analog-digital chip (U5), operational amplifier (U6) and voltage stabilizer (U8); The input end of said analog-digital chip (U5) connects the data-out port of single-chip microcomputer (U1); Said operational amplifier (U6) is connected into voltage follower; The OUT end of its input termination analog-digital chip (U5), output termination robot pilot; Said voltage stabilizer (U8) provide reference voltage for analog-digital chip (U5).
2. according to the said engine rotational speed signal appearance that is used for complete vehicle test of claim 1; It is characterized in that; Also comprise button inputting circuits in the formation, said button inputting circuits comprises four keyswitches, and the switching signal of their output connects the INT1 of single-chip microcomputer (U1)～INT4 end respectively.
3. according to claim 1 or the 2 said engine rotational speed signal appearance that are used for complete vehicle test; It is characterized in that; Also comprise display circuit in the formation; Said display circuit is made up of display driver (U7) and charactron display (DS), and the input end of said display driver (U7) connects the data-out port of single-chip microcomputer (U1), and output terminal drives charactron display (DS).
4. according to the said engine rotational speed signal appearance that is used for complete vehicle test of claim 3; It is characterized in that; Said signal acquisition circuit also comprises signal amplifier (U4); The simulating signal of the input end sending and receiving engine speed table output of said signal amplifier (U4), output terminal connect the IC8 end of single-chip microcomputer (U1).
5. according to the said engine rotational speed signal appearance that is used for complete vehicle test of claim 4; It is characterized in that; Also comprise communication chip (U2) in the formation; The RF2/U1RX end of said communication chip (U2) and RF3/U1TX end connect the U1RX/RF2 end and the U1TX/RF3 end of single-chip microcomputer (U1) respectively, and T1out end and R1in connect host computer.
6. according to the said engine rotational speed signal appearance that is used for complete vehicle test of claim 5, it is characterized in that said signal output apparatus is provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203736998U CN202305551U (en) | 2011-09-30 | 2011-09-30 | Engine speed signal instrument for complete vehicle test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203736998U CN202305551U (en) | 2011-09-30 | 2011-09-30 | Engine speed signal instrument for complete vehicle test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305551U true CN202305551U (en) | 2012-07-04 |
Family
ID=46374423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203736998U Expired - Fee Related CN202305551U (en) | 2011-09-30 | 2011-09-30 | Engine speed signal instrument for complete vehicle test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305551U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794060A (en) * | 2014-01-24 | 2014-05-14 | 中通客车控股股份有限公司 | Simulation vehicle topspeed detecting device and method |
| CN111751569A (en) * | 2020-06-24 | 2020-10-09 | 哈尔滨市科佳通用机电股份有限公司 | Wheel sensor performance detection device, system and method |
-
2011
- 2011-09-30 CN CN2011203736998U patent/CN202305551U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794060A (en) * | 2014-01-24 | 2014-05-14 | 中通客车控股股份有限公司 | Simulation vehicle topspeed detecting device and method |
| CN103794060B (en) * | 2014-01-24 | 2016-01-27 | 中通客车控股股份有限公司 | A kind of simulating vehicle rapid testing apparatus and method |
| CN111751569A (en) * | 2020-06-24 | 2020-10-09 | 哈尔滨市科佳通用机电股份有限公司 | Wheel sensor performance detection device, system and method |
| CN111751569B (en) * | 2020-06-24 | 2021-01-01 | 哈尔滨市科佳通用机电股份有限公司 | Wheel sensor performance detection device, system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101917178B (en) | Velocity transducer output signal analog device and method | |
| CN103454093A (en) | Handheld type retarder general-purpose tester | |
| CN202547697U (en) | Airborne sensor data acquisition system based on FPGA (field programmable gate array) | |
| CN203719917U (en) | Extended-range hybrid power test system | |
| CN201844928U (en) | Electric automobile data acquisition system based on LabVIEW (Laboratory Virtual Instrument Engineering Workbench) | |
| CN104895747A (en) | Multi-channel motor set vibration data collecting system based on STM | |
| CN203949716U (en) | A kind of digital weighing sensor | |
| CN201060104Y (en) | Motor vehicle braking system tester | |
| CN204576254U (en) | Driver's simulator stand that a kind of remote power controls | |
| CN102175280A (en) | Digitalized vehicle instrument simulating device | |
| CN202305551U (en) | Engine speed signal instrument for complete vehicle test | |
| CN101893687A (en) | Portable multi-function turntable test system based on wireless transmission | |
| CN205175709U (en) | Insert electric formula hybrid power system comprehensive properties laboratory bench | |
| CN204064633U (en) | A kind of electric hydraulic power-assisted steering pump real vehicle integrated test system | |
| CN102519640A (en) | Tester and testing method for testing pull and rotating speed of motor of minitype unmanned aerial vehicle | |
| CN208366367U (en) | Transfer case monitoring device testing auxiliary device | |
| CN206930938U (en) | A kind of data collecting card for temperature-measuring system of distributed fibers | |
| CN201561980U (en) | Automobile engine speed measuring device based on multiple detection | |
| CN101441152B (en) | Material tester based on USB data acquisition system | |
| CN201094096Y (en) | Hydraulic turbine swing embedded type surveillance protecting equipment | |
| CN204479667U (en) | A kind of portable electric energy quality analysis system based on DSP and ARM | |
| CN202274880U (en) | Direction recognition magnetic resistance sensor module | |
| CN212364462U (en) | Electric automobile driving motor working condition simulation test bench | |
| CN107654360A (en) | A kind of fire pump intelligent checking system based on CAN | |
| CN202205091U (en) | Hand-held diesel engine fault diagnostic instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20200930 |