CN102435765A - Pulse output type rotation speed sensor - Google Patents
Pulse output type rotation speed sensor Download PDFInfo
- Publication number
- CN102435765A CN102435765A CN2011103293710A CN201110329371A CN102435765A CN 102435765 A CN102435765 A CN 102435765A CN 2011103293710 A CN2011103293710 A CN 2011103293710A CN 201110329371 A CN201110329371 A CN 201110329371A CN 102435765 A CN102435765 A CN 102435765A
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- CN
- China
- Prior art keywords
- output type
- pulse
- pulse output
- speed sensor
- rotation speed
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a pulse output type rotation speed sensor, which comprises a gear disc installed on a rotation shaft, a magnetic pulse sensing permanent magnet, a soft magnet, an induction coil assembly, and a built-in signal reshaping circuit. The pulse output type rotation speed sensor disclosed by the invention can directly output large-amplitude pulse signals and has very strong anti-interference performance. The pulse output type rotation speed sensor adopts a passive designing technology and does not need external power supply, has the advantages of high intensity of output signals, strong anti-interference capability, no need of power supply, convenience in installation and use, no mechanical wear, long service life, and no need of control and provision of any excitation circuit, and can be used in smog, oil gas, hydrosphere and other environments.
Description
Technical field
The present invention relates to the automobile sensor technical field, be specifically related to a kind of speed probe.
Background technology
During modern chemical industry is already produced,, its importance is showed in the rotating speed detection and the automatic adjusting of electromechanical equipment day by day along with the raising of scientific and technological level.Speed probe belongs to the indirect type measurement mechanism, presses the difference that signal shape is guarded against formula, and speed probe can be divided into analog and digital two kinds.The former output signal value is the linear function of rotating speed, and the latter's output signal frequency is directly proportional with rotating speed, or its peak intervals and rotating speed are inversely proportional to.
Speed probe commonly used has following several kinds, and its complex structure of torque rotary speed sensor and cost are higher; Photoelectric tachometric transducer can only just can be measured the tachometer value of rotating shaft within a certain period of time to signal-count; The variable reluctance speed probe should not use in the violent occasion of vibration, and having under the environment such as dust mist of oil steam, uses and receive certain limitation.
Summary of the invention
To above-mentioned prior art, the technical matters that the present invention will solve is: traditional speed probe cost is higher, environment for use is limited, the weak poor anti jamming capability of output signal, serviceable life are short.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of pulse output type speed probe is provided, comprises the toothed disc, magnetic arteries and veins sensing permanent magnet, soft magnet, the inductive coil assembly that are installed in the rotating shaft, be characterised in that: also be provided with signal transformation circuit; The pulse signal that toothed disc cutting inductive coil produces is sent to signal transformation circuit, the big amplitude pulse signal of output after the shaping of signal transformation circuit pulse signals, the processing and amplifying.
The material of said permanent magnet is an aluminium nickel cobalt.
The material of said soft magnet is ferro-silicium or ingot iron.
Said coil block is made up of coil and skeleton, and framework material is nonmetal organic glass.
Compared with prior art, the present invention has following beneficial effect:
But a detection of gear, bent axle, spoke etc. rotate and apertured surface, adopt the passive design technology, need not externally fed;
Two, the present invention exports that signal is strong, the anti-interference ability strong, need not power supply, need not control provides any exciting circuit and easy to install, can under environment such as smog, oil gas, aqueous vapor, use and not have the mechanical long service life of wearing and tearing.
Description of drawings
Fig. 1 is a schematic diagram of the present invention
1 is that permanent magnet, 2 is that soft magnet, 3 is that inductive coil assembly, 4 is toothed disc among the figure.
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further description below.
A kind of pulse output type speed probe; Comprise the toothed disc, magnetic arteries and veins sensing permanent magnet, soft magnet, the inductive coil assembly that are installed in the rotating shaft, be characterised in that, go back the built-in signal shaping circuit; Directly the big amplitude pulse signal of output has very strong interference free performance; Employing passive design technology need not externally fed.
In conjunction with shown in Figure 1; The present invention adopts the magneto-electric induction principle to realize testing the speed, and promptly when gear rotates, the magnetic field magnetic line through cell winding changes; In cell winding, produce periodic voltage; Its amplitude is relevant with rotating speed, and rotating speed high output voltage more is high more, and output frequency is directly proportional with rotating speed.Rotating speed further increases, and the magnetic circuit loss increases, and output potential hastens towards saturation, when rotating speed surpasses certain value, and magnetic circuit loss aggravation, electric electromotive force camera lens.Through this voltage is handled counting, measure the rotating speed of gear.
The variation of output voltage, output voltage increases with rotating speed, and output voltage increases with air gap and reduces, and output voltage waveforms depends on the size and dimension of gear with respect to sensitivity.
Coil, magnet transfixion in the pulse output type speed probe, prototype gear is positioned on the tested rotary body, along with measured body rotates together.Revolution moves a tooth, and the concavo-convex of tooth causes the magnetic circuit magnetic resistance change rate once, and magnetic flux also just changes once, produces induced potential in the coil, and its change frequency equals the product of the number of teeth on tested rotating speed and the prototype gear.
Claims (4)
1. a pulse output type speed probe comprises the toothed disc, permanent magnet, soft magnet, the inductive coil assembly that are installed in the rotating shaft, is characterised in that: also be provided with signal transformation circuit; The pulse signal that toothed disc cutting inductive coil produces is sent to signal transformation circuit, the big amplitude pulse signal of output after the shaping of signal transformation circuit pulse signals, the processing and amplifying.
2. pulse output type speed probe according to claim 1 is characterized in that, the material of said permanent magnet is an aluminium nickel cobalt.
3. pulse output type speed probe according to claim 1 is characterized in that the material of said soft magnet is ferro-silicium or ingot iron.
4. pulse output type speed probe according to claim 1 is characterized in that said coil block is made up of coil and skeleton, and framework material is nonmetal organic glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103293710A CN102435765A (en) | 2011-10-26 | 2011-10-26 | Pulse output type rotation speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103293710A CN102435765A (en) | 2011-10-26 | 2011-10-26 | Pulse output type rotation speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102435765A true CN102435765A (en) | 2012-05-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103293710A Pending CN102435765A (en) | 2011-10-26 | 2011-10-26 | Pulse output type rotation speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102435765A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158498A (en) * | 2015-09-29 | 2015-12-16 | 哈尔滨东安发动机（集团）有限公司 | Aviation rotating speed sensor |
| CN110441543A (en) * | 2019-07-18 | 2019-11-12 | 浙江大学 | Core inductance formula angular speed sense measuring device and method based on magnetic saturation characteristic |
| CN111699395A (en) * | 2018-02-09 | 2020-09-22 | 克诺尔商用车制动系统有限公司 | Method and device for determining speed by means of inductive speed sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538179A (en) * | 2003-10-23 | 2004-10-20 | 华东师范大学 | Nanometer magnetic sensitive 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 |
| CN202256372U (en) * | 2011-10-26 | 2012-05-30 | 成都市翻鑫家科技有限公司 | Pulse-output type rotating-speed sensor |
-
2011
- 2011-10-26 CN CN2011103293710A patent/CN102435765A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538179A (en) * | 2003-10-23 | 2004-10-20 | 华东师范大学 | Nanometer magnetic sensitive 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 |
| CN202256372U (en) * | 2011-10-26 | 2012-05-30 | 成都市翻鑫家科技有限公司 | Pulse-output type rotating-speed sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158498A (en) * | 2015-09-29 | 2015-12-16 | 哈尔滨东安发动机（集团）有限公司 | Aviation rotating speed sensor |
| CN111699395A (en) * | 2018-02-09 | 2020-09-22 | 克诺尔商用车制动系统有限公司 | Method and device for determining speed by means of inductive speed sensor |
| CN110441543A (en) * | 2019-07-18 | 2019-11-12 | 浙江大学 | Core inductance formula angular speed sense measuring device and method based on magnetic saturation characteristic |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120502 |