CN104374943A - Speed detecting device for car engine - Google Patents
Speed detecting device for car engine Download PDFInfo
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- CN104374943A CN104374943A CN201410676749.8A CN201410676749A CN104374943A CN 104374943 A CN104374943 A CN 104374943A CN 201410676749 A CN201410676749 A CN 201410676749A CN 104374943 A CN104374943 A CN 104374943A
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Abstract
The invention discloses a speed detecting device for a car engine. A gear is arranged on a rotating shaft of the engine. A light source emitter and a light receiver are arranged on the two sides of a coded disc of the gear. The light receiver is connected with a microcontroller module through a pulse amplifying circuit. When the rotating shaft of the engine rotates, the gear is driven to rotate synchronously. A continuous light source emitted by the light source emitter forms light pulses through the coded disc of the gear and is irradiated to the light receiver. The receiver converts the light pulses, electric output pulses are generated and then are transmitted to the microcontroller through a pulse shaping amplifying circuit, and car engine rotating speed is obtained by computing. The speed detecting device 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 speed detector applying to motor car engine, 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=m n 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 D P/ (mn) calculate 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 speed detector applying to motor car engine for the deficiency of background technology, and its structure is simple, measuring accuracy is high, antijamming capability is strong and can the rotating speed of accurately measured automobiles engine.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of speed detector applying to motor car engine, the rotation axis of engine arranges a gear, in the code-disc both sides of gear, one light source emitter and an optical receiver are set respectively, described optical receiver connects micro controller module by pulse amplifying circuit, driven gear synchronous axial system when the rotation axis of engine rotates, the continuous light source that light source emitter sends is formed light pulse by the code-disc of gear and is irradiated on optical receiver; Light pulse conversion is produced electricity and exports pulse and then transfer to micro controller module by pulse shaping amplification circuit by optical receiver, and in the micro controller module acquisition units time, electricity exports pulse number and then draws rotating speed of automobile engine.
As a kind of further preferred version applying to the speed detector of motor car engine of the present invention, described light source emitter is light emitting diode.
As a kind of further preferred version applying to the speed detector of motor car engine of the present invention, described optical receiver is phototriode.
As a kind of further preferred version applying to the speed detector of motor car engine of the present invention, described micro controller module is FLEX10K series CPLD chip.
As a kind of further preferred version applying to the speed detector of motor car engine of the present invention, described micro controller module also connects a data transmission unit and a display unit, the automobile rotational speed that described data transmission unit is used for microcontroller to calculate transfers to Surveillance center, and described display unit is used for the automobile rotational speed that display microcontroller in real time calculates.
As a kind of further preferred version applying to the speed detector of motor car engine of the present invention, described display unit is charactron.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, structure is simple, measuring accuracy is high;
2, antijamming capability is strong and can the rotating speed of accurately measured automobiles engine;
3, simplify hardware circuit, reduce cost of products, shorten the design cycle, improve reliability and the dirigibility of device.
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 speed detector applying to motor car engine, it is characterized in that: a gear is set on the rotation axis of engine, in the code-disc both sides of gear, one light source emitter and an optical receiver are set respectively, described optical receiver connects micro controller module by pulse amplifying circuit, driven gear synchronous axial system when the rotation axis of engine rotates, the continuous light source that light source emitter sends is formed light pulse by the code-disc of gear and is irradiated on optical receiver; Light pulse conversion is produced electricity and exports pulse and then transfer to micro controller module by pulse shaping amplification circuit by optical receiver, when code-disc rotates, due to the light that the tooth on code-disc sends through light source emitter, can hinder light transmition.So the resistance at optical receiver two ends can vary widely, like this, the voltage gathering resistance in circuit will vary widely; In the micro controller module acquisition units time, electricity exports pulse number and then draws rotating speed of automobile engine.
Wherein, described light source emitter is light emitting diode, described light source receiver is phototriode, described micro controller module is FLEX10K series CPLD chip, described micro controller module also connects a data transmission unit and a display unit, the automobile rotational speed that described data transmission unit is used for microcontroller to calculate transfers to Surveillance center, and described display unit is used for the automobile rotational speed that display microcontroller in real time calculates, and described display unit is charactron.
The rotation axis of engine arranges a gear, in the code-disc both sides of gear, one light source emitter and an optical receiver are set respectively, the rotation driven gear synchronous axial system of engine, when the code-disc of gear rotates, due to the light that the gear on code-disc sends through light source emitter, light transmition can be hindered.Now the light pulse of reception is changed into electric pulse and transfers to micro controller module through pulse amplifying circuit by optical receiver, and micro controller module calculates engine speed according to process.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.
A kind of speed detector applying to motor car engine of the present invention adopts CPLD (ComplexProgrammable Logic Device) and a small amount of interface device to form, and the functional structure of system describes and adopts VHDL (Very HighSpeed Integrated Circuit Hardware DescriptionLanguage).Due to the CPLD chip that adopts can high density, high speed, realize to high-performance the design of complex digital system, hardware design is simplified greatly.There is the features such as design hardware configuration is simple, measuring accuracy is high, antijamming capability is strong.
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, General Principle as defined herein 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.Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (6)
1. one kind applies to the speed detector of motor car engine, it is characterized in that: a gear is set on the rotation axis of engine, in the code-disc both sides of gear, one light source emitter and an optical receiver are set respectively, described optical receiver connects micro controller module by pulse amplifying circuit, driven gear synchronous axial system when the rotation axis of engine rotates, the continuous light source that light source emitter sends is formed light pulse by the code-disc of gear and is irradiated on optical receiver; Light pulse conversion is produced electricity and exports pulse and then transfer to micro controller module by pulse shaping amplification circuit by optical receiver, and in the micro controller module acquisition units time, electricity exports pulse number and then draws rotating speed of automobile engine.
2. a kind of speed detector applying to motor car engine according to claim 1, is characterized in that: described light source emitter is light emitting diode.
3. a kind of speed detector applying to motor car engine according to claim 1, is characterized in that: described optical receiver is phototriode.
4. a kind of speed detector applying to motor car engine according to claim 1, is characterized in that: described micro controller module is FLEX10K series CPLD chip.
5. a kind of speed detector applying to motor car engine according to claim 1, it is characterized in that: described micro controller module also connects a data transmission unit and a display unit, the automobile rotational speed that described data transmission unit is used for microcontroller to calculate transfers to Surveillance center, and described display unit is used for the automobile rotational speed that display microcontroller in real time calculates.
6. a kind of speed detector applying to motor car engine according to claim 5, is characterized in that: described display unit is charactron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410676749.8A CN104374943A (en) | 2014-11-21 | 2014-11-21 | Speed detecting device for car engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410676749.8A CN104374943A (en) | 2014-11-21 | 2014-11-21 | Speed detecting device for car engine |
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| CN104374943A true CN104374943A (en) | 2015-02-25 |
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| CN201410676749.8A Withdrawn CN104374943A (en) | 2014-11-21 | 2014-11-21 | Speed detecting device for car engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067833A (en) * | 2015-08-28 | 2015-11-18 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection apparatus based on power controller |
| CN105092881A (en) * | 2015-08-28 | 2015-11-25 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection apparatus based on output pulse frequency |
| CN105158495A (en) * | 2015-08-28 | 2015-12-16 | 无锡伊佩克科技有限公司 | Rotating speed detection device based on power supply control and output pulse frequency |
| CN105181990A (en) * | 2015-08-28 | 2015-12-23 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection device |
| CN105259364A (en) * | 2015-08-28 | 2016-01-20 | 无锡伊佩克科技有限公司 | Rotating speed detection and control method of automobile engine |
| CN106053872A (en) * | 2016-06-27 | 2016-10-26 | 西南大学 | Speed measuring instrument based on infrared rays |
| CN110164266A (en) * | 2018-02-26 | 2019-08-23 | 王毅 | A kind of physical simulation experiment assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3871215A (en) * | 1971-05-10 | 1975-03-18 | Massachusetts Inst Technology | Opto-electronic apparatus to generate a pulse-modulated signal indicative of the mechanical state of a system |
| CN87213074U (en) * | 1987-09-07 | 1988-06-15 | 张恩 | Speed sensor |
| CN1178908A (en) * | 1996-08-06 | 1998-04-15 | 李扬荣 | Speed odometer with synchronous digital speed display and analogue speed pointer |
| CN201007718Y (en) * | 2006-12-22 | 2008-01-16 | 宁波南车时代传感技术有限公司 | Locomotive axle terminal photoelectric rotary speed sensor |
| CN101629861A (en) * | 2008-07-14 | 2010-01-20 | 北京新宇航世纪科技有限公司 | Torque rotary speed sensor |
-
2014
- 2014-11-21 CN CN201410676749.8A patent/CN104374943A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3871215A (en) * | 1971-05-10 | 1975-03-18 | Massachusetts Inst Technology | Opto-electronic apparatus to generate a pulse-modulated signal indicative of the mechanical state of a system |
| CN87213074U (en) * | 1987-09-07 | 1988-06-15 | 张恩 | Speed sensor |
| CN1178908A (en) * | 1996-08-06 | 1998-04-15 | 李扬荣 | Speed odometer with synchronous digital speed display and analogue speed pointer |
| CN201007718Y (en) * | 2006-12-22 | 2008-01-16 | 宁波南车时代传感技术有限公司 | Locomotive axle terminal photoelectric rotary speed sensor |
| CN101629861A (en) * | 2008-07-14 | 2010-01-20 | 北京新宇航世纪科技有限公司 | Torque rotary speed sensor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067833A (en) * | 2015-08-28 | 2015-11-18 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection apparatus based on power controller |
| CN105092881A (en) * | 2015-08-28 | 2015-11-25 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection apparatus based on output pulse frequency |
| CN105158495A (en) * | 2015-08-28 | 2015-12-16 | 无锡伊佩克科技有限公司 | Rotating speed detection device based on power supply control and output pulse frequency |
| CN105181990A (en) * | 2015-08-28 | 2015-12-23 | 无锡伊佩克科技有限公司 | Automobile engine rotating speed detection device |
| CN105259364A (en) * | 2015-08-28 | 2016-01-20 | 无锡伊佩克科技有限公司 | Rotating speed detection and control method of automobile engine |
| 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 |
| CN106053872A (en) * | 2016-06-27 | 2016-10-26 | 西南大学 | Speed measuring instrument based on infrared rays |
| CN110164266A (en) * | 2018-02-26 | 2019-08-23 | 王毅 | A kind of physical simulation experiment assembly |
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Application publication date: 20150225 |