CN107121603A - For Digital Automobile combination instrument quality detecting system - Google Patents
For Digital Automobile combination instrument quality detecting system Download PDFInfo
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- CN107121603A CN107121603A CN201710235239.0A CN201710235239A CN107121603A CN 107121603 A CN107121603 A CN 107121603A CN 201710235239 A CN201710235239 A CN 201710235239A CN 107121603 A CN107121603 A CN 107121603A
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- Prior art keywords
- resistance
- triode
- signal generator
- control unit
- signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses for Digital Automobile combination instrument quality detecting system, including signal input setup unit, microcontroller, output simultaneous display unit, signal output driver element, signal input setup unit, output simultaneous display unit, signal output driver element are connected with microcontroller respectively；Signal output driver element includes artifical resistance signal generator, frequency of signal generator and Alarm control unit, artifical resistance signal generator, frequency of signal generator and Alarm control unit are sequentially connected, and signal output driver element connects microcontroller by artifical resistance signal generator.The present invention expands the scope of application, while having simplified switch set, simplify operation, measuring accuracy height, detect reliable, strong antijamming capability and low cost and other advantages.
Description
Technical field
The present invention relates to automobile instrument detection, and in particular to for Digital Automobile combination instrument quality detecting system.
Background technology
Practical automobile instrument test system should be with data communication is reliable, control accuracy is high, set-up mode easy switching
The advantages of, during automobile instrument after-sale service, how rapidly and accurately to judge automobile instrument whether meet design requirement and
Whether actual working state is normal, one of subject matter as puzzlement automobile table manufacturer, after-sale service department and user.Cause
This, it is necessary to develop a kind of portable vehicle digital combination meter Online Transaction Processing controlled based on computer.Closely
Nian Lai, domestic scholars are designed and developed to automobile instrument detecting system, have studied the method for testing of instrument and be based on and its
The automobile instrument assembly intelligent detecting method of vision system, has designed and developed certain the type digital automobile instrument controlled based on industrial computer
Table factory testing equipment, but these Examination system of instrument poor universalities, volume are big, are not easy to live on-line checking application.
The content of the invention
The technical problems to be solved by the invention are that detecting system poor universality, volume are big, it is therefore intended that provided for vapour
Car digital combination meter quality detecting system, makes detecting system have the larger scope of application, simplify switching setting, operation side
Just.
The present invention is achieved through the following technical solutions：
For Digital Automobile combination instrument quality detecting system, including signal input setup unit, microcontroller, output are together
Display unit, signal output driver element are walked, the signal input setup unit, output simultaneous display unit, signal output are driven
Moving cell is connected with microcontroller respectively；The signal output driver element includes artifical resistance signal generator, frequency signal
Generator and Alarm control unit, the artifical resistance signal generator, frequency of signal generator and Alarm control unit are successively
Connection, the signal output driver element connects microcontroller by artifical resistance signal generator.The system is to frequency signal
Detection is to realize the setting of different frequency signals using the direct control output end mouthful of microcontroller, is suitable for current a variety of automobiles
The need for instrument is to different frequency signals, for analog signal, traditional essence is replaced using the artifical resistance signal of microcontroller
Cipher telegram hinders the way of output.
Further, artifical resistance signal generator includes difference amplifier, digital analog converter, reverser, emitter following
Device, the difference amplifier is connected with digital analog converter, and the digital analog converter, reverser, emitter follower are sequentially connected, institute
Digital analog converter, reverser, emitter follower is stated also to be connected with microcontroller respectively.Program-controlled resistor is the fixation in appropriate resistance
One controlled voltage source with microprocessor control of series connection, when the output voltage of voltage source changes, will make on resistance
The equivalent resistance that fixed resistance and controlled voltage source are constituted changes.
Further, Alarm control unit includes high voltage control unit and low voltage control unit, the high voltage control unit
It is connected respectively with frequency of signal generator with low voltage control unit.
Further, low voltage control unit includes register U5, resistance R10, resistance R11, resistance R12, triode Q3, institute
The signal output pin that resistance R10 one end is connected to register U5 is stated, its other end is connected with triode Q3 base stage；Resistance
R11 one end is connected on the circuit that resistance R10 is connected with triode Q3, its other end ground connection；Triode Q3 emitter stage connects
Ground；Resistance R12 one end is connected with triode Q3 colelctor electrode, and its other end is signal output part.Register U5 is used
MC74HC164N。
Further, high voltage control unit include register U6, it is resistance R13, resistance R14, resistance R15, triode Q4, anti-
To device U4, described resistance R15 one end is connected as signal input part, its other end with triode Q4 colelctor electrode, triode Q4
Emitter stage connect positive 12V voltages；Resistance R14 one end is connected with triode Q4 base stage, the input of its other end and reverser U4
End connection；Resistance R13 one end is connected on the circuit that resistance R14 is connected with reverser U4, its another positive 12V voltage of termination；Instead
It is connected to device U4 output end with register U6 input.Register U5 uses MC74HC164N.
Further, frequency of signal generator include resistance R8, resistance R9 and triode Q2, described resistance R8 one end with it is micro-
The programme-control input port connection of controller, its other end is connected with positive voltage；The base stage of the triode Q2 is connected to electricity
On the circuit that resistance R8 is connected with microcontroller, its grounded emitter；Resistance R9 one end is connected to triode Q2 colelctor electrode, and its is another
The one positive 12V voltages of termination, the programme-control output port of the microcontroller is connected to the line that resistance R9 is connected with triode Q2
Lu Shang.
The present invention compared with prior art, has the following advantages and advantages：The present invention can be straight by microcontroller
Connect control output end mouthful to realize the setting of different frequency signals, be suitable for current a variety of automobile instruments to different frequency signals
Need, for analog signal, replace traditional precision resistance way of output using the artifical resistance signal of microcontroller, expand
The scope of application, at the same have simplify switching set, simplify operation, measuring accuracy is high, detection is reliable, strong antijamming capability and into
This low advantage.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is structured flowchart of the present invention；
Fig. 2 is artifical resistance signal generator block diagram of the present invention；
Fig. 3 is artifical resistance signal generator circuit schematic diagram of the present invention；
Fig. 4 is frequency of signal generator circuit diagram of the present invention；
Fig. 5 is low voltage control unit circuit diagram of the present invention；
Fig. 6 is high voltage control element circuit schematic diagram of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment
As shown in figure 1, for Digital Automobile combination instrument quality detecting system, including signal input setup unit, micro-control
Device processed, output simultaneous display unit, signal output driver element, the signal input setup unit, output simultaneous display unit,
Signal output driver element is connected with microcontroller respectively；The signal output driver element occurs including artifical resistance signal
Device, frequency of signal generator and Alarm control unit, the artifical resistance signal generator, frequency of signal generator and alarm control
Unit processed is sequentially connected, and the signal output driver element connects microcontroller by artifical resistance signal generator.Alarm control
Unit processed include high voltage control unit and low voltage control unit, the high voltage control unit and low voltage control unit respectively with frequency
Signal generator is connected.
As shown in Fig. 2 artifical resistance signal generator includes difference amplifier, digital analog converter, reverser, emitter following
Device, the difference amplifier is connected with digital analog converter, and the digital analog converter, reverser, emitter follower are sequentially connected, institute
Digital analog converter, reverser, emitter follower is stated also to be connected with microcontroller respectively.As shown in figure 3, resistance R2 voltage passes through
Difference amplifier U0 carries out voltage amplification, and the voltage at resistance R2 two ends is digital analog converter AD7520JN reference voltage, by micro-
Controller is together in series after setting the numerical value of N of digital analog converter, the analog signal processing that digital analog converter is produced with resistance R2
Equivalent resistance is constituted, because the generation of resistance signal directly passes through microprocessor control, it is easy to accomplish, control is flexible.
As shown in figure 4, frequency of signal generator include resistance R8, resistance R9 and triode Q2, described resistance R8 one end with
The programme-control input port connection of microcontroller, its other end is connected with positive voltage；The base stage of the triode Q2 is connected to
On the circuit that resistance R8 is connected with microcontroller, its grounded emitter；Resistance R9 one end is connected to triode Q2 colelctor electrode, its
Another positive 12V voltages of termination, the programme-control output port of the microcontroller is connected to what resistance R9 was connected with triode Q2
On circuit.Changed using the electric voltage frequency of micro-controller program control input port, the output of simulated implementation different frequency signals,
As the input frequency signal of driving instrument, its set of frequency can be set by serial communication mode in parameter setting procedure
In specified address location.
As shown in figure 5, low voltage control unit includes register U5, resistance R10, resistance R11, resistance R12, triode Q3,
Described resistance R10 one end is connected to register U5 signal output pin, and its other end is connected with triode Q3 base stage；Resistance
R11 one end is connected on the circuit that resistance R10 is connected with triode Q3, its other end ground connection；Triode Q3 emitter stage connects
Ground；Resistance R12 one end is connected with triode Q3 colelctor electrode, and its other end is signal output part.Using microcontroller CLK and
The Bits Serial input/output register MC74HC164N of DATA port controllings two-way 8, is turned on and off the electricity being made up of triode Q3
Sub switch circuit, can be achieved low to 16 tunnels per road electronic switching circuit with external alarm message signal and electric power generating composition control loop
The control function cut-off control, complete to instrument low level alarm signal in voltage control alarm signal loop.
As shown in fig. 6, high voltage control unit include register U6, resistance R13, resistance R14, resistance R15, triode Q4,
Reverser U4, described resistance R15 one end is connected as signal input part, its other end with triode Q4 colelctor electrode, triode
Q4 emitter stage connects positive 12V voltages；Resistance R14 one end is connected with triode Q4 base stage, and its other end is defeated with reverser U4's
Enter end connection；Resistance R13 one end is connected on the circuit that resistance R14 is connected with reverser U4, its another positive 12V voltage of termination；
Reverser U4 output end is connected with register U6 input.Utilize CLK the and DATA port controllings two-way 8 of microcontroller
Serial input output register MC74HC164N, is turned on and off the electronic switching circuit being made up of triode Q4, per road electronics
On-off circuit can be achieved to control alarm signal loop to 16 tunnel low-voltages with external alarm message signal and electric power generating composition control loop
The control function cut-off control, complete to instrument high level alarm signal.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (6)
1. for Digital Automobile combination instrument quality detecting system, it is characterised in that including signal input setup unit, microcontroller
Device, output simultaneous display unit, signal output driver element, the signal input setup unit, output simultaneous display unit, letter
Number output driving unit is connected with microcontroller respectively；The signal output driver element include artifical resistance signal generator,
Frequency of signal generator and Alarm control unit, the artifical resistance signal generator, frequency of signal generator and alarm control
Unit is sequentially connected, and the signal output driver element connects microcontroller by artifical resistance signal generator.
2. according to claim 1 be used for Digital Automobile combination instrument quality detecting system, it is characterised in that the simulation
Resistance signal generator includes difference amplifier, digital analog converter, reverser, emitter follower, the difference amplifier and number
Weighted-voltage D/A converter is connected, and the digital analog converter, reverser, emitter follower be sequentially connected, the digital analog converter, reverser,
Emitter follower is also connected with microcontroller respectively.
3. according to claim 1 be used for Digital Automobile combination instrument quality detecting system, it is characterised in that the alarm
Control unit include high voltage control unit and low voltage control unit, the high voltage control unit and low voltage control unit respectively with frequency
Rate signal generator is connected.
4. according to claim 3 be used for Digital Automobile combination instrument quality detecting system, it is characterised in that the low pressure
Control unit includes register U5, resistance R10, resistance R11, resistance R12, triode Q3, and described resistance R10 one end, which is connected to, posts
Storage U5 signal output pin, its other end is connected with triode Q3 base stage；Resistance R11 one end is connected to resistance R10
On the circuit being connected with triode Q3, its other end ground connection；Triode Q3 grounded emitter；Resistance R12 one end and triode
Q3 colelctor electrode connection, its other end is signal output part.
5. according to claim 3 be used for Digital Automobile combination instrument quality detecting system, it is characterised in that the high pressure
Control unit includes register U6, resistance R13, resistance R14, resistance R15, triode Q4, reverser U4, the resistance R15 mono-
End is as signal input part, and its other end is connected with triode Q4 colelctor electrode, and triode Q4 emitter stage connects positive 12V voltages；
Resistance R14 one end is connected with triode Q4 base stage, and its other end is connected with reverser U4 input；Resistance R13 one end connects
It is connected on the circuit that resistance R14 is connected with reverser U4, its another positive 12V voltage of termination；Reverser U4 output end and deposit
Device U6 input connection.
6. according to claim 1 be used for Digital Automobile combination instrument quality detecting system, it is characterised in that the frequency
Signal generator includes resistance R8, resistance R9 and triode Q2, and the programme-control of described resistance R8 one end and microcontroller is inputted
Port is connected, and its other end is connected with positive voltage；The base stage of the triode Q2 is connected to what resistance R8 was connected with microcontroller
On circuit, its grounded emitter；Resistance R9 one end is connected to triode Q2 colelctor electrode, its another positive 12V voltage of termination, described
The programme-control output port of microcontroller is connected on the circuit that resistance R9 is connected with triode Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235239.0A CN107121603A (en) | 2017-04-12 | 2017-04-12 | For Digital Automobile combination instrument quality detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710235239.0A CN107121603A (en) | 2017-04-12 | 2017-04-12 | For Digital Automobile combination instrument quality detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN107121603A true CN107121603A (en) | 2017-09-01 |
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ID=59726155
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710235239.0A Pending CN107121603A (en) | 2017-04-12 | 2017-04-12 | For Digital Automobile combination instrument quality detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842773A (en) * | 2017-11-24 | 2019-06-04 | 比亚迪股份有限公司 | A kind of vehicle camera system and the vehicle with it |
Citations (4)
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|---|---|---|---|---|
| CN201159653Y (en) * | 2008-01-22 | 2008-12-03 | 东风电子科技股份有限公司 | Automatic checking instrument of vehicle electronic instrument |
| CN102735258A (en) * | 2012-06-15 | 2012-10-17 | 宁波吉江汽车制造有限责任公司 | Automobile instrument detection device |
| CN205280759U (en) * | 2015-12-18 | 2016-06-01 | 绍兴联英汽车电子有限公司 | Automobile instrument detection system |
| CN206959885U (en) * | 2017-04-12 | 2018-02-02 | 亿信标准认证集团有限公司 | A kind of automobile instrument performance rating device |
-
2017
- 2017-04-12 CN CN201710235239.0A patent/CN107121603A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201159653Y (en) * | 2008-01-22 | 2008-12-03 | 东风电子科技股份有限公司 | Automatic checking instrument of vehicle electronic instrument |
| CN102735258A (en) * | 2012-06-15 | 2012-10-17 | 宁波吉江汽车制造有限责任公司 | Automobile instrument detection device |
| CN205280759U (en) * | 2015-12-18 | 2016-06-01 | 绍兴联英汽车电子有限公司 | Automobile instrument detection system |
| CN206959885U (en) * | 2017-04-12 | 2018-02-02 | 亿信标准认证集团有限公司 | A kind of automobile instrument performance rating device |
Non-Patent Citations (2)
| Title |
|---|
| 邱淑贤等: "基于柔性测试的汽车电子组合仪表在线调整检测系统", 《长春工业大学学报(自然科学版)》 * |
| 邱淑贤等: "汽车数字组合仪表检测系统研发", 《汽车工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842773A (en) * | 2017-11-24 | 2019-06-04 | 比亚迪股份有限公司 | A kind of vehicle camera system and the vehicle with it |
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Application publication date: 20170901 |