CN201434763Y - Universal-type rotational-speed measuring instrument for motor vehicle engine - Google Patents
Universal-type rotational-speed measuring instrument for motor vehicle engine Download PDFInfo
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- CN201434763Y CN201434763Y CN2009200874344U CN200920087434U CN201434763Y CN 201434763 Y CN201434763 Y CN 201434763Y CN 2009200874344 U CN2009200874344 U CN 2009200874344U CN 200920087434 U CN200920087434 U CN 200920087434U CN 201434763 Y CN201434763 Y CN 201434763Y
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- speed
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Abstract
The utility model provides a universal-type rotational-speed measuring instrument for a motor vehicle engine, which is used for detecting and testing a finished motor vehicle. A harmonics rotational-speed transducer, a stabilized voltage power supply, a measure control and drive system, a rotational-speed display component and a cylinder number wave-band switch are arranged in a case; the harmonics rotational-speed transducer is connected with a automobile power supply plug, the measure control and drive system and a cylinder number band switch respectively; the stabilized voltage power supplyis connected with the automobile power supply plug, the measure control and drive system and the harmonics rotational-speed transducer respectively; an analog output interface is arranged in the measure control and drive system connected with the rotational-speed display component; the processed harmonic signals can be displayed as rotational-speed values on a pointer display and a liquid crystaldisplay; and the vehicle power supply is both the signal power supply and the working power supply. The universal-type rotational-speed measuring instrument is suitable for measuring the rotational speeds of gasoline, diesel oil, and liquefied petroleum gas motor vehicle engines with various power supply system voltages, and has the advantages of simple structure, convenient adaptation, reliableuse and stable running.
Description
Technical field
The utility model is a kind of general form motor car engine rotating speed detector that the motor vehicle car load detects and tests that is used for, it can be widely applicable for various petrol engine motor vehicles, diesel motor motor vehicle and liquefied petroleum gas (LPG) (LPG) engine motor vehicle, is used for the detection of its engine speed.
Background technology
The tachometer value of motor car engine is important technical parameter during the motor vehicle car load detects and tests, thereby the versatility of rotating speed detection method, convenience and practicality are also just significant.In the prior art, the rotating speed of petrol engine and liquefied petroleum gas (LPG) (LPG) engine detects, employing be the firing pulse sensor, carry out signals collecting in the mode of inductive ignition pulsed frequency; The rotating speed of diesel motor detects, employing be piezoelectric sensor, carry out signals collecting in the mode of the ripple frequency of induction spray bar pressure.Like this, dissimilar motor vehicles need to adopt different sensor and surveying instrument, and being provided with of sensor, all has the defective that installs and fixes trouble and power taking inconvenience; On the other hand, owing to adopt the injection pressure and the engine speed of the diesel motor of high-pressure common rail technology to have nothing to do, adopt piezoelectric sensor can not be applicable to that the rotating speed to high pressure co-rail diesel engine detects.
Summary of the invention
The purpose of this utility model is to provide a kind of general form motor car engine rotating speed detector, the rotating speed that it can be widely applicable for the motor vehicle of various petrol engines, diesel motor and liquefied petroleum gas (LPG) (LPG) engine detects, have simple and the accurate characteristics of measurement, and the voltage of power sources of motor vehicle system is not had specific (special) requirements.
The technical scheme that the utility model is dealt with problems is:
Be provided with supply harmonic speed probe, stabilized voltage supply, observing and controlling and drive system, rotating speed display device and cylinder in the cabinet and count waver; The signal input part of supply harmonic speed probe connects the power supply on vehicle plug, and the signal output part of supply harmonic speed probe connects the signal input part of observing and controlling and drive system, and the supply harmonic speed probe connects cylinder and counts waver; The input end of stabilized voltage supply connects the power supply on vehicle plug; Be provided with the simulation output interface in observing and controlling and the drive system, observing and controlling is connected the rotating speed display device with drive system.
The junction of the input end of stabilized voltage supply and power supply on vehicle plug is connected in parallel to surge absorber, is connected in series with resistance R 1 and diode D1 between the input end of stabilized voltage supply and the power supply on vehicle plug.
The output terminal of stabilized voltage supply connects the working power end of supply harmonic speed probe and observing and controlling and drive system respectively.The output terminal of stabilized voltage supply also connects the working power end of backlight leds.
Observing and controlling is connected stepper motor driving circuit, liquid crystal display drive circuit and simulation output interface respectively with microcontroller in the drive system, and stepper motor driving circuit is by instrument stepper motor concatenation pointer display, and liquid crystal display drive circuit connects LCD.
The beneficial effects of the utility model are: owing to adopt the power supply on vehicle plug to connect the version of the signal input part and the stabilized voltage supply input end of supply harmonic speed probe respectively, can obtain the working power of devices such as supply harmonic speed probe on the one hand, can utilize the harmonic signal of power sources of motor vehicle system to obtain the tach signal of motor car engine on the other hand, thereby, to the petrol engine motor vehicle, diesel motor motor vehicle and liquefied petroleum gas (LPG) motor vehicle can realize that all engine speed detects, and all applicable to the motor vehicle of various power-supply system voltages.Simultaneously, owing to be provided with the supply harmonic speed probe in the cabinet, the supply harmonic speed probe is connected with cylinder and counts waver, thereby, the rotating speed that the utility model can be directly used in motor car engine detects, and except that the cylinder number presets, does not need to carry out setting in advance of other.In addition, owing to be connected with stepper motor driving circuit, liquid crystal display drive circuit and simulation output interface respectively on the microcontroller in observing and controlling and the drive system, thereby, rotating speed indication of the present utility model has stationarity, intuitive and accuracy, and the simulation output interface is then for providing convenience with connecting of other equipment.That the utility model also has is simple in structure, connect conveniently, use reliable and stable advantage.
Description of drawings
The embodiment that provides below in conjunction with accompanying drawing further specifies the utility model.
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the structured flowchart of observing and controlling and drive system and rotating speed display device.
Among the figure, 1. power supply on vehicle plug, 2. cabinet, 3. stabilized voltage supply, 4. supply harmonic speed probe, 5. cylinder is counted waver, 6. observing and controlling and drive system, 7. backlight leds, 8. rotating speed display device, 9. pointer display, 10. stepper motor driving circuit, 11. instrument stepper motors, 12. LCD, 13. liquid crystal display drive circuits, 14. photoelectrical couplers, 15. reset and voltage monitoring circuit, 16. shaping circuit, 17. microcontrollers, 18 capacitor C 1,19. diode D1,20. surge absorber, 21. resistance R, 1,22. synchronous serial bus, 23. distribution, 24. simulation output interfaces.
Embodiment
Appearance part of the present utility model mainly comprises power supply on vehicle plug (1) and cabinet (2).
Power supply on vehicle plug (1) can be adaptive with the motor vehicle socket that lights a cigarette, and also can utilize the mode of conversion socket line and vehicle battery adaptive.
The front panel of cabinet (2) is provided with cylinder and counts waver (5), rotating speed display device (8), backlight leds (7), more than 3 parts have built-in part concurrently.The rear panel of cabinet (2) is provided with simulation output interface (24), and these parts have built-in part concurrently.
Cabinet (2) inside is provided with: stabilized voltage supply (3), supply harmonic speed probe (4), observing and controlling and drive system (6), rotating speed display device (8), capacitor C 1 (18), diode D1 (19), surge absorber (20), resistance R 1 (21), distribution (23).
Observing and controlling and drive system (6) comprising: photoelectrical coupler (14), shaping circuit (16), microcontroller (17), stepper motor driving circuit (10), liquid crystal display drive circuit (13) resets and voltage monitoring circuit (15), synchronous serial bus (22), distribution (23), simulation output interface (24).
Rotating speed display device (8) comprising: pointer display (9), instrument stepper motor (11), LCD (12).
Start the utility model: power supply on vehicle plug (1) is inserted motor vehicle to be detected light a cigarette on the socket, perhaps utilize the mode of conversion socket line, power supply on vehicle plug (1) and accumulator of motor-driven vehicle to be detected are connected, the utility model is promptly in running order.
Engine cylinder number presets: the outside cylinder of operation cabinet (2) is counted waver (5), and the engine cylinder number of motor vehicle to be detected is preset input.
The input signals path: utilize power supply on vehicle to make input signal, the one, can obtain working power of the present utility model; The 2nd, can obtain the harmonic signal of power sources of motor vehicle system, use input signal to detect as the utility model.The harmonic signal of power supply on vehicle has reflected the tach signal of motor car engine, and this harmonic signal enters supply harmonic speed probe (4) behind power supply on vehicle plug (1).
The path of tach signal and testing process: the power supply on vehicle that comprises harmonic signal enters capacitor C 1 (18), through after straight filtering, harmonic signal enters supply harmonic speed probe (4), by analysis and computing, the output speed pulse signal enters observing and controlling and drive system (6) then.In observing and controlling and drive system (6), handle and calculate through microcontroller (17), divide three tunnel outputs.The first via enters stepper motor driving circuit (10), and after Subdividing Processing, control instrument stepper motor (11) makes the form of pointer display (9) with the calibration indication, indicates the speed revolution value of the motor car engine that detects gained.The second the tunnel, enter liquid crystal display drive circuit (13), make LCD (12) with the form that numeral shows, demonstrate the speed revolution value of the motor car engine that detects gained.Third Road via simulation output interface (24) output simulating signal, uses for other testing apparatuss or data collector.Because the effect of backlight leds (7), pointer display (9) and LCD (12) are even under noctilucence and low light level state, and numerical value is high-visible shown in still can making.
The path of working power: power supply on vehicle enters diode D1 (19) rectification, to prevent the electric power polarity mistake, through resistance R 1 (21) dividing potential drop, then through surge absorber (20) bypass, to eliminate the transition high pressure in the power sources of motor vehicle system, enter stabilized voltage supply (3) again, through multistage linear voltage stabilization, to adapt to the voltage range of various power sources of motor vehicle system, reduce the thermal value of stabilivolts at different levels.The utility model does not use Switching Power Supply, can prevent that Switching Power Supply from passing through conduction and radiation mode imports electromagnetic interference (EMI) to the power sources of motor vehicle system, and influence is to the accuracy of detection of engine rotational speed signal.The working power of stabilized voltage supply (3) output, difference supply power harmonic wave speed probe (4), observing and controlling and drive system (6) and backlight leds (7) are used.
The principle of work of observing and controlling and drive system (6): from the rotational speed pulse signal of supply harmonic speed probe (4), isolate through the photoelectricity of photoelectrical coupler (14), the signal shaping of shaping circuit (16) enters microcontroller.Reset and to improve the stability of observing and controlling and drive system (6) with voltage monitoring circuit (15).After the frequency computation part of rotational speed pulse signal was handled, the signal through microcontroller (17) output presented three road outgoing routes.The first via, the step frequency pulse signal and the direction signal of microcontroller (17) output enter stepper motor driving circuit (10), control instrument stepper motor (11), make the form of pointer display (9), indicate the speed revolution value of the motor car engine that detects gained with the calibration indication.Adopt the stepper motor driving circuit (10) that segments Driving technique can reduce the step angle of instrument stepper motor (11), make its operation evenly,, prevent shake to drive the pointer smooth rotation.The second the tunnel, the digital signal of microcontroller (17) output enters liquid crystal display drive circuit (13) by synchronous serial bus (22), makes LCD (12) with the form that numeral shows, demonstrates the speed revolution value of the motor car engine that detects gained.Third Road, microcontroller (17) output digital signal by synchronous serial bus (22), enters simulation output interface (24), converts simulating signal to, sends other testing apparatuss or data collector to and uses.
Claims (4)
1. a general form motor car engine rotating speed detector is characterized in that: be provided with supply harmonic speed probe (4), stabilized voltage supply (3), observing and controlling and drive system (6), rotating speed display device (8) and cylinder in the cabinet (2) and count waver (5); The signal input part of supply harmonic speed probe (4) connects power supply on vehicle plug (1), the signal output part of supply harmonic speed probe (4) connects the signal input part of observing and controlling and drive system (6), and supply harmonic speed probe (4) connects cylinder and counts waver (5); The input end of stabilized voltage supply (3) connects power supply on vehicle plug (1); Be provided with simulation output interface (24) in observing and controlling and the drive system (6), observing and controlling is connected rotating speed display device (8) with drive system (6).
2. general form motor car engine rotating speed detector according to claim 1, it is characterized in that: the junction of the input end of stabilized voltage supply (3) and power supply on vehicle plug (1) is connected in parallel to surge absorber (20), is connected in series with resistance R 1 (21) and diode D1 (19) between the input end of stabilized voltage supply (3) and the power supply on vehicle plug (1).
3. general form motor car engine rotating speed detector according to claim 1 is characterized in that: the output terminal of stabilized voltage supply (3) connects the working power end of supply harmonic speed probe (4) and observing and controlling and drive system (6) respectively.
4. general form motor car engine rotating speed detector according to claim 1, it is characterized in that: observing and controlling is connected stepper motor driving circuit (10), liquid crystal display drive circuit (13) and simulation output interface (24) respectively with microcontroller (17) in the drive system (6), stepper motor driving circuit (10) is by instrument stepper motor (11) concatenation pointer display (9), and liquid crystal display drive circuit (13) connects LCD (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200874344U CN201434763Y (en) | 2009-07-17 | 2009-07-17 | Universal-type rotational-speed measuring instrument for motor vehicle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200874344U CN201434763Y (en) | 2009-07-17 | 2009-07-17 | Universal-type rotational-speed measuring instrument for motor vehicle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201434763Y true CN201434763Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200874344U Expired - Fee Related CN201434763Y (en) | 2009-07-17 | 2009-07-17 | Universal-type rotational-speed measuring instrument for motor vehicle engine |
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| Country | Link |
|---|---|
| CN (1) | CN201434763Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331721A (en) * | 2011-09-28 | 2012-01-25 | 潍柴动力股份有限公司 | Method, device and system for testing dynamic analog simulation of electronic control diesel engine |
-
2009
- 2009-07-17 CN CN2009200874344U patent/CN201434763Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331721A (en) * | 2011-09-28 | 2012-01-25 | 潍柴动力股份有限公司 | Method, device and system for testing dynamic analog simulation of electronic control diesel engine |
| CN102331721B (en) * | 2011-09-28 | 2013-09-18 | 潍柴动力股份有限公司 | Method, device and system for testing dynamic analog simulation of electronic control diesel engine |
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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 |
Granted publication date: 20100331 Termination date: 20140717 |
|
| EXPY | Termination of patent right or utility model |