CN105092881A - Automobile engine rotating speed detection apparatus based on output pulse frequency - Google Patents
Automobile engine rotating speed detection apparatus based on output pulse frequency Download PDFInfo
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- CN105092881A CN105092881A CN201510543026.5A CN201510543026A CN105092881A CN 105092881 A CN105092881 A CN 105092881A CN 201510543026 A CN201510543026 A CN 201510543026A CN 105092881 A CN105092881 A CN 105092881A
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Abstract
The invention discloses an automobile engine rotating speed detection apparatus based on output pulse frequency. The apparatus comprises a rotating speed sensor, a pulse shaping amplification circuit, a microcontroller module and a display module. The rotating speed sensor is connected with the microcontroller module through the pulse shaping amplification circuit, the display module is connected with the corresponding port of the microcontroller module, the rotating speed sensor comprises a light source emitter, a rotation gear and a photoelectric sensor, and the light source emitter and the photoelectric sensor are arranged at the two sides of the rotation gear. The automobile engine rotating speed detection apparatus based on the output pulse frequency is simple in structure and high in measuring precision.
Description
Technical field
The present invention relates to a kind of speed measuring device, particularly relate to a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency, belong to velocity measuring field.
Background technology
At present, in China's transport process, ubiquity the phenomenon that overspeed of vehicle travels, this behavior is not only easy to be damaged driver, also can produce the pedestrian in roadside or other vehicles and threaten, the traffic hazard caused thus is of common occurrence, causes great harm to the security of the lives and property of society and people.How to detect that the travel speed of vehicle in transit has become vehicle supervision department's major issue urgently to be resolved hurrily accurately and efficiently.
Traditional method for detecting vehicle speed has radar velocity measurement, laser velocimeter, infraredly to test the speed, ultrasound wave tests the speed and Data mining etc.These methods in use have certain limitation, are mainly reflected in: one, and measuring accuracy is limited; Two, find that overspeed of vehicle can not provide the comprehensively transport information such as the car category of vehicles peccancy and the number-plate number when travelling, timely process cannot be made to vehicles peccancy; Three, equipment is fragile, and maintenance cost is high.Current Bus-Speed Monitoring is all add detecting unit near tire substantially, for detecting the parameters that tyre rotation produces, calculate the judgement speed of a motor vehicle by parameters, but testing result and velocity accuracy all needs to be further improved.
Electronic instrument is all the size being determined the speed of a motor vehicle by the frequency of detection speed of a motor vehicle sensor signal, the corresponding 60km/h of as corresponding in 1Hz 1km/h, 60Hz.The frequency of vehicle speed signal is generally determined by 3 parameters: diameter of tyres D (or girth), this parameter can by the linear velocity of tire and speed of a motor vehicle v (unit km/h), convert angular velocity omega 1 (unit rPm) to, formula is as follows: ω 1=v/60 π D, and different vehicle diameter of tyres is different; Ratio of gear n, the reduction gear ratio n of process between output shaft of gear-box to tire, this parameter can convert tire angular velocity ω 1 to gearbox output shaft angular velocity omega 2, and formula is as follows: ω 2=n ω 1, and different vehicle ratio of gear is different; Often turn umber of pulse m, sensor and gear case coordinate, gearbox output shaft often turns around, sensor produces m pulse signal, gearbox output shaft angular velocity omega 2 is converted to the pulse signal frequency P (unit: Hz) that instrument detects by this parameter, and formula is as follows: P=m ω 2/60=mn ω 1/60=mnv/ (3600 π D).
The usual measuring truck short-cut counting method according to the frequency values P detected, through formula: v=3600 π DP/ (mn) calculates speed of a motor vehicle numerical value.That is: v=kP, constant k=3600 π D/ (mn).This method has 2 restrictions when instrument Software for Design: requirement accurately can know these three data values of D, m, n, and the inaccurate Bus-Speed Monitoring that all can cause of any one parameter is forbidden, and during any one unknown parameters, design just cannot complete; During vehicle change, when in these three parameters, any one parameter changes, instrument software all will make corresponding modify, also namely wants mter model to change, just, with car load one_to_one corresponding, it is numerous that model increases the trouble brought to each process of operation such as production, management, sale.
Such as application number is a kind of method for detecting vehicle speed of " 201210342552.1 ", run with predetermined speed v by allowing car load, on car load detection line, speed of a motor vehicle test board can be carried out, the now signal frequency P that detects of instrument, obtain k=v/P afterwards as calculated, and by this value stored in instrument system, constant k when normally working as instrument, when instrument normally works, the speed of a motor vehicle is v=kP.The beneficial effect of the technical program is adopted to facilitate feasible, instrument software developer need not pay close attention to car load physical construction and correlation parameter, decrease the work of confiding a technological secret of both sides of supply and demand in product development process, shorten the construction cycle, be applicable to all vehicles that instrument physical dimension is identical.But need to be further improved in rate accuracy.
And for example application number is " 201310045928.7 " a kind of method for detecting vehicle speed based on enumerating exploration, by marking three lane lines on image, hand labeled is no less than three pairs of unique points, set up mapping table, delimit tracing area, build a width background image, the method then adopting present frame and background image to do difference carries out target identification, utilize ratio method to find unique point, finally recycling enumerates the method calculating speed of a motor vehicle of exploration.The method for detecting vehicle speed of this invention, can detect the speed of vehicle in transit in real time, accurately, coordinates other application of intelligent transportation system can obtain rapidly the comprehensive information of vehicles peccancy, not by environmental restraint.Be applicable to the monitoring to the speed of a motor vehicle in intelligent traffic administration system, reduce the generation of traffic hazard, have broad application prospects.Although this invention solves vehicle speed measurement, need to be further improved in rate accuracy.
Summary of the invention
Technical matters to be solved by this invention provides a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of rotating speed of automobile engine pick-up unit based on output pulse frequency, comprise speed probe, pulse shaping amplification circuit, micro controller module and display module, described speed probe connects micro controller module by pulse shaping amplification circuit, described display module is connected on the corresponding port of micro controller module, described speed probe comprises light source emitter, transmitting gear and photoelectric sensor, and described light source emitter and photoelectric sensor are arranged on the both sides of transmitting gear;
Wherein, described light source emitter, for generation of the light pulse continued;
Photoelectric sensor, for converting electricity output pulse by what receive to by the light pulse of transmitting gear;
Pulse shaping amplification circuit, the electricity for producing photoelectric sensor exports pulse and carries out shaping amplification process;
Micro controller module, for exporting pulse number according to electricity in the acquisition units time and then draw rotating speed of automobile engine;
Display module, for showing the rotating speed of automobile engine that micro controller module analysis draws in real time.
As the further preferred version of a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency of the present invention, described light source emitter is light emitting diode.
As the further preferred version of a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency of the present invention, the chip model of described photoelectric sensor is E3JK-5M3.
As the further preferred version of a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency of the present invention, described micro controller module adopts the CPLD chip of FLEX10K series.
As the further preferred version of a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency of the present invention, described display module is LCD display.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, structure of the present invention is simple, measuring accuracy is high, antijamming capability is strong and can the rotating speed of accurately measured automobiles generator,
Simplify hardware circuit, reduce cost of products, shorten the design cycle, improve reliability and the dirigibility of system;
2, antijamming capability of the present invention is strong and can the rotating speed of accurately measured automobiles engine; Light signal to convert to export pulse and then transfer to micro controller module by pulse shaping amplification circuit by photoelectric sensor and calculates actual engine speed by the present invention.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency, comprise speed probe, pulse shaping amplification circuit, micro controller module and display module, described speed probe connects micro controller module by pulse shaping amplification circuit, described display module is connected on the corresponding port of micro controller module, described speed probe comprises light source emitter, transmitting gear and photoelectric sensor, and described light source emitter and photoelectric sensor are arranged on the both sides of transmitting gear;
Wherein, described light source emitter, for generation of the light pulse continued;
Photoelectric sensor, for converting electricity output pulse by what receive to by the light pulse of transmitting gear;
Pulse shaping amplification circuit, the electricity for producing photoelectric sensor exports pulse and carries out shaping amplification process;
Micro controller module, for exporting pulse number according to electricity in the acquisition units time and then draw rotating speed of automobile engine;
Display module, for showing the rotating speed of automobile engine that micro controller module analysis draws in real time.
Wherein, described light source emitter is light emitting diode, and the chip model of described photoelectric sensor is E3JK-5M3, and described micro controller module adopts the CPLD chip of FLEX10K series, and described display module is LCD display.
Structure of the present invention is simple, measuring accuracy is high, antijamming capability is strong and can the rotating speed of accurately measured automobiles generator,
Simplify hardware circuit, reduce cost of products, shorten the design cycle, improve reliability and the dirigibility of system; Antijamming capability of the present invention is strong and can the rotating speed of accurately measured automobiles engine; Light signal to convert to export pulse and then transfer to micro controller module by pulse shaping amplification circuit by photoelectric sensor and calculates actual engine speed by the present invention.
It is all by arranging speed pickup detection speed near tire that current most of car speed detects, but can not show a candle in degree of accuracy by Photoelectric Detection come accurate.
Photoelectric speed detects and first utilizes mechanical drive mode, the rotating speed of train wheel is changed into the change of luminous flux, by photo-electric conversion element, the change of luminous flux is converted to the change of electric flux again, namely light pulse is converted to electric impulse signal, by calculating rotating speed to electric pulse.Photo-electric conversion element principle of work, namely when certain material is penetrated in illumination, if incident photon energy is enough large, cause electronics to overflow material surface, or resistance changes, or produces the change of electromotive force.
FLEX10K family device is embedded PLD product, and each FLEX10K device comprises an embedded Array and a logic array.Embedded Array is made up of some embedded array block piece roof gardens, for realizing the logic function of various complexity.Logic array is made up of logic array block, for realizing generic logic.FLEX10K device adopts reconfigurable CNOSSRAM unit, and its structure assembly realizes the whole features needed for functional universal gate array, and device capacitance can reach 10,000 ~ 250,000.Have low in energy consumption, interconnection mode flexibly, support the features such as multivoltage I/O interface, can high density, high speed, high-performance whole system is integrated in individual devices.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, the General Principle that the present invention defines can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.Above embodiments of the present invention are explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. the rotating speed of automobile engine pick-up unit based on output pulse frequency, it is characterized in that: comprise speed probe, pulse shaping amplification circuit, micro controller module and display module, described speed probe connects micro controller module by pulse shaping amplification circuit, described display module is connected on the corresponding port of micro controller module, described speed probe comprises light source emitter, transmitting gear and photoelectric sensor, and described light source emitter and photoelectric sensor are arranged on the both sides of transmitting gear;
Wherein, described light source emitter, for generation of the light pulse continued;
Photoelectric sensor, for converting electricity output pulse by what receive to by the light pulse of transmitting gear;
Pulse shaping amplification circuit, the electricity for producing photoelectric sensor exports pulse and carries out shaping amplification process;
Micro controller module, for exporting pulse number according to electricity in the acquisition units time and then draw rotating speed of automobile engine;
Display module, for showing the rotating speed of automobile engine that micro controller module analysis draws in real time.
2. a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency according to claim 1, is characterized in that: described light source emitter is light emitting diode.
3. a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency according to claim 1, is characterized in that: the chip model of described photoelectric sensor is E3JK-5M3.
4. a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency according to claim 1, is characterized in that: described micro controller module adopts the CPLD chip of FLEX10K series.
5. a kind of rotating speed of automobile engine pick-up unit based on output pulse frequency according to claim 1, is characterized in that: described display module is LCD display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510543026.5A CN105092881A (en) | 2015-08-28 | 2015-08-28 | Automobile engine rotating speed detection apparatus based on output pulse frequency |
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| CN201510543026.5A CN105092881A (en) | 2015-08-28 | 2015-08-28 | Automobile engine rotating speed detection apparatus based on output pulse frequency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017036000A1 (en) * | 2015-08-28 | 2017-03-09 | 无锡伊佩克科技有限公司 | Rotating speed detection device based on power supply control and output pulse frequency |
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| CN2105689U (en) * | 1991-10-05 | 1992-05-27 | 姜烈 | Rotational speed detector |
| JPH09229951A (en) * | 1996-02-20 | 1997-09-05 | Namco Ltd | Rotation detector and game machine using the detector |
| JPH1038902A (en) * | 1996-07-22 | 1998-02-13 | Nec Corp | Detector for rotational speed |
| CN104181326A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Device for measuring rotating speed of motor |
| CN104374943A (en) * | 2014-11-21 | 2015-02-25 | 无锡科思电子科技有限公司 | Speed detecting device for car engine |
-
2015
- 2015-08-28 CN CN201510543026.5A patent/CN105092881A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2105689U (en) * | 1991-10-05 | 1992-05-27 | 姜烈 | Rotational speed detector |
| JPH09229951A (en) * | 1996-02-20 | 1997-09-05 | Namco Ltd | Rotation detector and game machine using the detector |
| JPH1038902A (en) * | 1996-07-22 | 1998-02-13 | Nec Corp | Detector for rotational speed |
| CN104181326A (en) * | 2013-05-27 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Device for measuring rotating speed of motor |
| CN104374943A (en) * | 2014-11-21 | 2015-02-25 | 无锡科思电子科技有限公司 | Speed detecting device for car engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017036000A1 (en) * | 2015-08-28 | 2017-03-09 | 无锡伊佩克科技有限公司 | Rotating speed detection device based on power supply control and output pulse frequency |
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Application publication date: 20151125 |
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