CN104374941A - Engine rotating speed measuring device - Google Patents
Engine rotating speed measuring device Download PDFInfo
- Publication number
- CN104374941A CN104374941A CN201410493040.4A CN201410493040A CN104374941A CN 104374941 A CN104374941 A CN 104374941A CN 201410493040 A CN201410493040 A CN 201410493040A CN 104374941 A CN104374941 A CN 104374941A
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- measuring device
- magnet
- signal processor
- engine
- speed measuring
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Abstract
An engine rotating speed measuring device comprises an engine shell, a measuring device body, a measuring seat and a signal processor. The measuring seat is fixed to the engine shell through bolts, the top of the measuring seat is connected with the signal processor, the signal processor is connected with coils through a wire a and a wire b, an induction iron core penetrates through the centers of the coils, the top of the induction iron core is connected with a magnet, fillers are arranged around the magnet, the measuring device body penetrates through the engine shell, the fillers are rubber, and the magnet is a ferromagnetic permanent magnet. The engine rotating speed measuring device has the advantages that the structure is simple, mounting and use are convenient, in the use process, the fault probability is low, measurement is stable, and measuring precision is high.
Description
Technical field
The present invention designs a kind of engine speed measuring device.
Background technology
Engine speed be reflection engine working conditions be substantially the most also one of important parameter.The accurate measurement of engine speed, for from engine assembly, debugging, control, is all very necessary to many occasions such as motor vehicle operation, inspections.Traditional measurement of engine rotate speed method mainly uses the tachometer gage with engine shaft contact, not only the method simple but also accurate, but for motor car engine, the use of contact tachometer gage usually limits it and uses because of touching engine shaft.Another kind method is on engine shaft, or the rotatable parts be attached thereto add reflective marker, being irradiated to light beam is added with in the rotating shaft of reflective marker, the light of reflective marker reflection is by photoelectric detector, rotating shaft is often circled generation pulse, just accurately can measure engine speed through pulse-scaling circuit.This optics rotating speed measurement method is a kind of typical noncontacting measurement technology.The method realizing on-mechanical contact tachometric survey can also adopt electronic measurement technique, such as, by extracting gasoline motor spark plug ignition signal, can realize measurement of engine rotate speed.For the engine having ignition distributor, ignition signal can directly be obtained by ignition distributor low tension terminal.For the engine of electronic ignition, an inductive coil can be added on one of them firing cable, obtain ignition signal by electromagnetic induction.Ignition signal is carried out the electronic signal process such as filtering, amplification, shaping and step-by-step counting, and consider the parameter such as engine strokes and number of cylinders, can engine speed value be obtained.The method is measured accurately and reliably, but this method is not suitable for rotary speed of diesel engine to be measured.Although above-mentioned various method is without the need to contacting with engine shaft, still needs the hood of motor vehicle to open, just can carry out measurement of engine rotate speed to motor vehicle, this inspection for motor vehicle, maintenance are not very inconvenient.Therefore the technology being badly in need of a kind of improvement solves above-mentioned technological deficiency.
Summary of the invention
The invention provides a kind of engine speed measuring device.
The present invention is directed to the technical scheme that above-mentioned technological deficiency proposes is:
A kind of engine speed measuring device, comprise motor body, measurement mechanism, measuring seat and signal processor, described measuring seat is bolted on motor body, described measuring seat top connection signal processor, described signal processor is by wire a and wire b connecting coil, and described coil central authorities are installed with inductive iron core, and described inductive iron core top connects magnet, be provided with filling material around described magnet, described measurement mechanism is through motor body.
Described filling material is rubber.
Described magnet is ferromagnetism permanent magnet.
The invention has the beneficial effects as follows: structure is simple, and easy to install, the probability in use broken down is less, Measurement sensibility, and measuring accuracy is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1, motor body, 2, measuring seat, 3, signal processor, 4, measurement mechanism, 5, wire a, 6, wire b, 7, magnet, 8, filling material, 9, bolt, 10, inductive iron core, 11, coil.
Embodiment
A kind of engine speed measuring device, comprise motor body 1, measurement mechanism 4, measuring seat 2 and signal processor 3, measuring 2 is fixed on motor body 1 by bolt 9, measuring seat 2 top connection signal processor 3, signal processor 3 is by wire a5 and wire b6 connecting coil 11, coil 11 central authorities are installed with inductive iron core 10, inductive iron core 10 top connects magnet 7, filling material 8 is provided with around magnet 7, measurement mechanism 4 is through motor body 1, filling material 8 is rubber, magnet 7 is ferromagnetism permanent magnet, structure is simple, easy to install, the probability in use broken down is less, Measurement sensibility, measuring accuracy is high.
Claims (3)
1. an engine speed measuring device, comprise motor body, measurement mechanism, measuring seat and signal processor, it is characterized in that: described measuring seat is bolted on motor body, described measuring seat top connection signal processor, described signal processor is by wire a and wire b connecting coil, and described coil central authorities are installed with inductive iron core, and described inductive iron core top connects magnet, be provided with filling material around described magnet, described measurement mechanism is through motor body.
2. a kind of engine speed measuring device according to claim 1, is characterized in that: described filling material is rubber.
3. a kind of engine speed measuring device according to claim 1, is characterized in that: described magnet is ferromagnetism permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493040.4A CN104374941A (en) | 2014-09-24 | 2014-09-24 | Engine rotating speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493040.4A CN104374941A (en) | 2014-09-24 | 2014-09-24 | Engine rotating speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104374941A true CN104374941A (en) | 2015-02-25 |
Family
ID=52553982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410493040.4A Pending CN104374941A (en) | 2014-09-24 | 2014-09-24 | Engine rotating speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104374941A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233293A (en) * | 1990-11-17 | 1993-08-03 | August Bilstein Gmbh & Co. Kg | Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber |
| CN2537980Y (en) * | 2002-03-22 | 2003-02-26 | 哈尔滨志阳汽车电气股份有限公司 | Magnetoelectric automobile speed sensor |
| CN200947105Y (en) * | 2006-07-19 | 2007-09-12 | 上海华普发动机有限公司 | Apparatus for measuring velocity of crankshaft |
| CN201319037Y (en) * | 2008-12-13 | 2009-09-30 | 威海双丰电子集团有限公司 | Rotary speed sensor |
| CN202661478U (en) * | 2012-04-20 | 2013-01-09 | 株洲电力机车电机修造有限公司 | Passive speed sensor |
| CN202693603U (en) * | 2012-06-21 | 2013-01-23 | 长沙七维传感技术股份有限公司 | Magnetoresistive rotating-speed sensor for locomotive |
-
2014
- 2014-09-24 CN CN201410493040.4A patent/CN104374941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233293A (en) * | 1990-11-17 | 1993-08-03 | August Bilstein Gmbh & Co. Kg | Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber |
| CN2537980Y (en) * | 2002-03-22 | 2003-02-26 | 哈尔滨志阳汽车电气股份有限公司 | Magnetoelectric automobile speed sensor |
| CN200947105Y (en) * | 2006-07-19 | 2007-09-12 | 上海华普发动机有限公司 | Apparatus for measuring velocity of crankshaft |
| CN201319037Y (en) * | 2008-12-13 | 2009-09-30 | 威海双丰电子集团有限公司 | Rotary speed sensor |
| CN202661478U (en) * | 2012-04-20 | 2013-01-09 | 株洲电力机车电机修造有限公司 | Passive speed sensor |
| CN202693603U (en) * | 2012-06-21 | 2013-01-23 | 长沙七维传感技术股份有限公司 | Magnetoresistive rotating-speed sensor for locomotive |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150225 |
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| WD01 | Invention patent application deemed withdrawn after publication |