CN103604953A - High-precision automobile diesel engine rotating speed instrument verification device - Google Patents
High-precision automobile diesel engine rotating speed instrument verification device Download PDFInfo
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- CN103604953A CN103604953A CN201310578285.2A CN201310578285A CN103604953A CN 103604953 A CN103604953 A CN 103604953A CN 201310578285 A CN201310578285 A CN 201310578285A CN 103604953 A CN103604953 A CN 103604953A
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- 238000004088 simulation Methods 0.000 claims abstract description 11
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- 238000004164 analytical calibration Methods 0.000 description 3
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Abstract
The invention relates to a high-precision automobile diesel engine rotating speed instrument verification device which is connected with a diesel engine rotating speed instrument. The verification device comprises a microprocessor subsystem and a diesel engine rotating speed signal simulation subsystem which are interconnected. The diesel engine rotating speed signal simulation subsystem is connected with the diesel engine rotating speed instrument. The microprocessor subsystem sends a control signal to the diesel engine rotating speed signal simulation subsystem which generates a high-precision signal source simulating operation of a diesel engine according to the control signal, and the high-precision signal source is provided to the diesel engine rotating speed instrument. Compared with devices in the prior art, the verification device has advantages that difficulties in a verification technology of the diesel engine rotating speed instrument are solved, the verification process which is rapid, accurate and convenient is realized, and excellent performance of the verification device in practical application is affirmed and popularized.
Description
Technical field
The present invention relates to a kind of diesel engine speed instrument calibration technology, especially relate to a kind of calibration equipment of high precision diesel engine of vehicle rotational speed meters.
Background technology
Diesel engine, in the application of automotive field, has been to popularize very much, and usage quantity is also very large.Diesel engine tachometer is the main instrument of reflection diesel engine work at present state, directly monitors the operation of diesel engine, and the precision of tachometer gage can have influence on the accurate judgement to diesel engine running status.Therefore to the verification of tachometer gage, be, daily work.
Along with developing rapidly of industrial technology, diesel engine has obtained universal widely.The particularly drive unit under extreme environment and heavy-duty engine, diesel engine becomes indispensable visual plant.In order to use safely and effectively diesel engine, diesel engine speed instrument is the key link accurately.In order to guarantee the accurate of diesel engine speed instrument, its verifying work is also just become to the most important thing.First check meter will have the signal source of standard, and the signal that provides is highly stable, precision is high, tachometer value is just set conveniently, otherwise, just cannot just to instrument, do verification, to verification fast and effectively, brought difficulty.
Summary of the invention
Object of the present invention is exactly the calibration equipment that the high precision diesel engine of vehicle rotational speed meters of a kind of robotization, visual, hardware and software platform is provided in order to overcome the defect that above-mentioned prior art exists, solved the difficulty on diesel engine speed instrument calibration technology, realize fast, accurately, checking procedure easily, with excellent performance, obtained certainly and promoted in actual applications.
Object of the present invention can be achieved through the following technical solutions:
A kind of calibration equipment of high precision diesel engine of vehicle rotational speed meters, this device is connected with diesel engine speed instrument, it is characterized in that, described calibration equipment comprises interconnective microprocessor subsystem and diesel engine speed signal imitation subsystem, and described diesel engine speed signal imitation subsystem is connected with diesel engine speed instrument:
Described microprocessor subsystem sends to diesel engine speed signal imitation subsystem by control signal, and this diesel engine speed signal imitation subsystem produces the high-precision signal source of simulation diesel engine running according to control signal, and offers diesel engine speed instrument.
Described diesel engine speed signal imitation subsystem comprises frequency converter, synchronous motor, transmission shaft, cross roller and the testing tube connecting successively, and described frequency converter is connected with microprocessor subsystem, and described testing tube is connected with diesel engine speed instrument;
Described synchronous motor drives cross roller to rotate by transmission shaft, and described cross roller rotary collision testing tube, makes testing tube produce the oil spout state that micro-vibration is used for simulating spray bar.
The frequency of described micro-vibration and the rotating speed of synchronous motor are linear.
The rotating speed of described synchronous motor and the output frequency of frequency converter are linear.
Described microprocessor subsystem comprises PIC microprocessor, LCD, RS485 interface, keyboard and power supply, and described PIC microprocessor is connected with power supply with LCD, RS485 interface, keyboard respectively, and described RS485 interface is connected with frequency converter.
Described keyboard is for setting the tachometer value of working method and initialize verification.
Described PIC microprocessor converts frequency converter to according to the preset tachometer value of keyboard input and exports corresponding frequency values, PIC microprocessor converts this frequency values to the tachometer value of current reality again, be presented on LCD, the error of it and synchronous motor running speed ten thousand/several more than, effectively eliminate the error of calculating and quantizing to produce.
Described diesel engine speed signal imitation subsystem is fixed on base rack, and described synchronous motor is fixed on base rack by synchronous motor support.
Described base rack is epsilon-type structure, comprises horizontal support and is fixed on three vertical supports on horizontal support, and described transmission shaft and testing tube are installed in vertical supports, and described synchronous motor support is fixed on horizontal support.
Compared with prior art, the present invention has the following advantages:
1, utilize synchronous motor to drive wheel shaft and the connected equipment that knocks, with incoming frequency, trigger the mechanical vibration of metal oil conduit, make diesel engine speed instrument can detect exactly vibration simultaneously, and simulation is tested the speed.
2, frequency converter alternating current voltage frequency output terminal connects synchronous motor voltage input end, and to control the incoming frequency of synchronous motor, both effectively coordinate, make speed adjustable stable, running precision is high.
3, frequency converter signal input part connects the RS-485 port be connected with PIC single-chip microcomputer, usings single-chip microcomputer as the core of the control and measurement of whole system, adopts totally digitilized interfacing, makes signal transmission error minimum, monitors in real time the state of feedback inverter.
4, the input end of PIC single-chip microcomputer connects keyboard, output terminal connecting fluid crystal display screen, and the system that realizes is visual and operate real-time, sets up friendly perfect interaction platform.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structured flowchart of control section of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As depicted in figs. 1 and 2, a kind of calibration equipment of high precision diesel engine of vehicle rotational speed meters, this device is connected with diesel engine speed instrument 6, described calibration equipment comprises interconnective microprocessor subsystem and diesel engine speed signal imitation subsystem, and described diesel engine speed signal imitation subsystem is connected with diesel engine speed instrument 6; Described microprocessor subsystem sends to diesel engine speed signal imitation subsystem by control signal, and this diesel engine speed signal imitation subsystem produces simulation diesel engine CRANK PULSES according to control signal, and offers diesel engine speed instrument 6.
Described diesel engine speed signal imitation subsystem comprises frequency converter 8, synchronous motor 2, transmission shaft 3, cross roller 4 and the testing tube 5 connecting successively, described frequency converter 8 is connected with microprocessor subsystem, and described testing tube 5 is connected with diesel engine speed instrument 6; Described synchronous motor 2 drives 4 rotations of cross roller by transmission shaft 3, and described cross roller 3 rotary collision testing tubes 5 make testing tube 5 produce the oil spout state that micro-vibration is used for simulating spray bar.The frequency of described micro-vibration and the rotating speed of synchronous motor are linear.The rotating speed of described synchronous motor and the output frequency of frequency converter are linear.
Described diesel engine speed signal imitation subsystem is fixed on base rack 1, and described synchronous motor is fixed on base rack 1 by synchronous motor support 7.Described base rack 1 is epsilon-type structure, comprises horizontal support and is fixed on three vertical supports on horizontal support, and described transmission shaft and testing tube are installed in vertical supports, and described synchronous motor support 7 is fixed on horizontal support.
Described microprocessor subsystem comprises PIC microprocessor 9, LCD11, RS485 interface, keyboard 10 and power supply, and described PIC microprocessor 9 is connected with power supply with LCD11, RS485 interface, keyboard 10 respectively, and described RS485 interface is connected with frequency converter.Described keyboard is for setting the tachometer value of working method and verification.
Described PIC microprocessor 9 converts frequency converter to according to the tachometer value of keyboard input and exports corresponding frequency values, and synchronous motor converts this frequency values to tachometer value again.
The present invention measures and verification the precision of diesel engine of vehicle tachometer of measuring.For the measurement rotating speed principle of diesel engine speed instrument, to simulate the mode of diesel engine running, replace diesel motor, simulating signal provides the signal of diesel engine speed gage probe.The rotating speed of simulation has the output of computer control numeral, and simulation rotary speed precision is very high, scope large, rotating speed changes feature flexibly, is applicable to such instrument of different model.
There is strict corresponding relation in the running speed of synchronous motor and the output frequency of frequency converter, the frequency that changes frequency converter is exactly the running speed that changes synchronous motor, and the out-put supply of frequency converter is synchronous motor power supply.Because the frequency accuracy of frequency converter out-put supply is very high, good stability, the further working frequency accuracy compensation of microprocessor, therefore, obtains micro-vibration frequency source of standard.Frequency converter needs the tachometer value of work according to synchronous motor, export corresponding supply frequency, adjusts voltage and makes compensated torque.Simulation diesel engine CRANK PULSES is to produce by physical construction, after rotary cross roller, and between testing tube, produces micro-vibration, the frequency of its vibrations and the strict corresponding relation of the rotating speed of synchronous motor.Give detection simulation, realize the free setting to verification scope, comprise high-precision analogue value measurements and calculations, and the robotization of this system, visual and hardware and software platform.The invention solves the difficulty on diesel engine speed instrument calibration technology, realize fast, accurately, checking procedure easily, with excellent performance, obtained certainly and promoted in actual applications.
Claims (9)
1. the calibration equipment of a high precision diesel engine of vehicle rotational speed meters, this device is connected with diesel engine speed instrument, it is characterized in that, described calibration equipment comprises interconnective microprocessor subsystem and diesel engine speed signal imitation subsystem, and described diesel engine speed signal imitation subsystem is connected with diesel engine speed instrument:
Described microprocessor subsystem sends to diesel engine speed signal imitation subsystem by control signal, and this diesel engine speed signal imitation subsystem produces the high-precision signal source of simulation diesel engine running according to control signal, and offers diesel engine speed instrument.
2. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 1, it is characterized in that, described diesel engine speed signal imitation subsystem comprises frequency converter, synchronous motor, transmission shaft, cross roller and the testing tube connecting successively, described frequency converter is connected with microprocessor subsystem, and described testing tube is connected with diesel engine speed instrument:
Described synchronous motor drives cross roller to rotate by transmission shaft, and described cross roller rotary collision testing tube, makes testing tube produce the oil spout state that micro-vibration is used for simulating spray bar.
3. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 2, is characterized in that, the frequency of described micro-vibration and the rotating speed of synchronous motor are linear.
4. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 2, is characterized in that, the rotating speed of described synchronous motor and the output frequency of frequency converter are linear.
5. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 2, it is characterized in that, described microprocessor subsystem comprises PIC microprocessor, LCD, RS485 interface, keyboard and power supply, described PIC microprocessor is connected with power supply with LCD, RS485 interface, keyboard respectively, and described RS485 interface is connected with frequency converter.
6. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 5, is characterized in that, described keyboard is for setting the tachometer value of working method and initialize verification.
7. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 5, it is characterized in that, described PIC microprocessor converts frequency converter to according to the preset tachometer value of keyboard input and exports corresponding frequency values, PIC microprocessor converts this frequency values to the tachometer value of current reality again, be presented on LCD, the error of it and synchronous motor running speed ten thousand/several more than, effectively eliminate the error of calculating and quantizing to produce.
8. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 2, it is characterized in that, described diesel engine speed signal imitation subsystem is fixed on base rack, and described synchronous motor is fixed on base rack by synchronous motor support.
9. the calibration equipment of high precision diesel engine of vehicle rotational speed meters according to claim 8, it is characterized in that, described base rack is epsilon-type structure, comprise horizontal support and be fixed on three vertical supports on horizontal support, described transmission shaft and testing tube are installed in vertical supports, and described synchronous motor support is fixed on horizontal support.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310578285.2A CN103604953B (en) | 2013-11-18 | 2013-11-18 | A kind of calibration equipment of high accuracy diesel engine of vehicle rotational speed meters |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310578285.2A CN103604953B (en) | 2013-11-18 | 2013-11-18 | A kind of calibration equipment of high accuracy diesel engine of vehicle rotational speed meters |
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| CN103604953A true CN103604953A (en) | 2014-02-26 |
| CN103604953B CN103604953B (en) | 2016-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707842A (en) * | 2020-06-28 | 2020-09-25 | 中车大连机车车辆有限公司 | Frequency signal generation method based on RS485 serial port and rotating speed system test method |
| CN112067849A (en) * | 2020-09-23 | 2020-12-11 | 广州广电计量检测股份有限公司 | Speedometer sensor calibration system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539837A (en) * | 2011-12-26 | 2012-07-04 | 苏州工业园区广福汽保机电设备有限公司 | Calibrator for calibrating revolution meter of diesel engine |
| CN203117225U (en) * | 2013-03-05 | 2013-08-07 | 广西壮族自治区计量检测研究院 | Calibration device of rotating speed measuring meter of diesel engine |
-
2013
- 2013-11-18 CN CN201310578285.2A patent/CN103604953B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539837A (en) * | 2011-12-26 | 2012-07-04 | 苏州工业园区广福汽保机电设备有限公司 | Calibrator for calibrating revolution meter of diesel engine |
| CN203117225U (en) * | 2013-03-05 | 2013-08-07 | 广西壮族自治区计量检测研究院 | Calibration device of rotating speed measuring meter of diesel engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707842A (en) * | 2020-06-28 | 2020-09-25 | 中车大连机车车辆有限公司 | Frequency signal generation method based on RS485 serial port and rotating speed system test method |
| CN112067849A (en) * | 2020-09-23 | 2020-12-11 | 广州广电计量检测股份有限公司 | Speedometer sensor calibration system |
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| CN103604953B (en) | 2016-07-06 |
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