CN202256372U - Pulse-output type rotating-speed sensor - Google Patents
Pulse-output type rotating-speed sensor Download PDFInfo
- Publication number
- CN202256372U CN202256372U CN2011204130203U CN201120413020U CN202256372U CN 202256372 U CN202256372 U CN 202256372U CN 2011204130203 U CN2011204130203 U CN 2011204130203U CN 201120413020 U CN201120413020 U CN 201120413020U CN 202256372 U CN202256372 U CN 202256372U
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- pulse
- output type
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- speed probe
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Abstract
The utility model discloses a pulse-output type rotating-speed sensor which comprises a gear disc, a magnetic pulse sensing permanent magnet, a soft magnet and an induction coil assembly, wherein the gear disc is arranged on a rotating shaft; and the inside of the pulse-output type rotating-speed sensor is also provided with a signal shaping circuit which directly outputs large-amplitude pulse signals and has strong anti-jamming performance. The sensor adopts a passive design technique, therefore, an external power supply is not required; the sensor is strong in output signals, strong in anti-jamming performance, and convenient to install and use; operations of supplying power and controlling to provide any exciting circuit are not required; the sensor can be used in smog, oil gas and brume environments and the like; and the sensor has no mechanical wear and is long in service life.
Description
Technical field
The utility model relates to the automobile sensor technical field, is 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.
The utility model content
To above-mentioned prior art, the technical matters that the utility model 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 utility model 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 utlity model 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 utility model output signal is strong, the anti-interference ability is 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 machinery wearing and tearing long service life.
Description of drawings
Fig. 1 is the schematic diagram of the utility model
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 utility model is done further to describe 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 magneto-electric induction principle that adopts the utility model realizes 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 |
|---|---|---|---|
| CN2011204130203U CN202256372U (en) | 2011-10-26 | 2011-10-26 | Pulse-output type rotating-speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204130203U CN202256372U (en) | 2011-10-26 | 2011-10-26 | Pulse-output type rotating-speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256372U true CN202256372U (en) | 2012-05-30 |
Family
ID=46117591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204130203U Expired - Fee Related CN202256372U (en) | 2011-10-26 | 2011-10-26 | Pulse-output type rotating-speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256372U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435765A (en) * | 2011-10-26 | 2012-05-02 | 成都市翻鑫家科技有限公司 | Pulse output type rotation speed sensor |
-
2011
- 2011-10-26 CN CN2011204130203U patent/CN202256372U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435765A (en) * | 2011-10-26 | 2012-05-02 | 成都市翻鑫家科技有限公司 | Pulse output type rotation speed sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20121026 |