CN2742445Y - Self powered digital tachometer - Google Patents
Self powered digital tachometer Download PDFInfo
- Publication number
- CN2742445Y CN2742445Y CN 200320122999 CN200320122999U CN2742445Y CN 2742445 Y CN2742445 Y CN 2742445Y CN 200320122999 CN200320122999 CN 200320122999 CN 200320122999 U CN200320122999 U CN 200320122999U CN 2742445 Y CN2742445 Y CN 2742445Y
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- CN
- China
- Prior art keywords
- permanent magnetism
- digital
- power supply
- power generator
- speed probe
- Prior art date
- 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.)
- Expired - Fee Related
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The utility model discloses a digital tachometer which can normally work without external power. The casing of the digital tachometer is provided with a sensor, a permanent magnetism low power generator and a power supply rectifying stabilizing circuit. The sensor and the permanent magnetism low power generator are driven to work by the rotating axle of detected equipment to generate rotational speed signal and stable working power supply. Thus the digital tachometer can work in the condition of no external power supply.
Description
Affiliated technical field
The utility model relates to a kind of proving installation of gig velocity of rotation, especially is fit to the accurate test of needs but the outside occasion that can't power.
Background technology
Present known rotating speed instrument is linked by speed probe (primary instrument) and test instrumentation (secondary instrument).Speed probe produces the tach signal of testee, promptly with rotating speed voltage, electric current or the photoelectric pulse signal of determining relation is arranged.This type of signal is transferred in the testing tool again, demonstrates the numerical value of rotating speed after the treated conversion.But testing tool and a lot of speed probe need the outside that power supply is provided, the ability operate as normal, and making does not much have power supply or bans use of the occasion of power supply can't use these instruments.At this moment electromagnetic type pointer instrument of Cai Yonging or mechanical centrifugal tachometer exist again precision low, shock-sensitive moving, be difficult for and many shortcomings such as external unit binding such as computing machine.The present the best digital rotating speed instrument of performance, have the precision height, show clear, anti-vibration, can with advantages such as external unit bridging work such as computing machine, but it must have working power.
Summary of the invention
For overcoming the shortcoming of electromagnetic type pointer instrument, mechanical type tachometer gage, solve the working power problem of digital rotating speed instrument again, the utility model provides a kind of self-power digital rotational speed meters.Do not need the just good digital rotational speed meters of energy usability of externally fed.The technical scheme that its technical matters that solves the utility model adopts is: when tested slewing and sensor link, increase a permanent magnetism small power generator again, drive its work by the output revolving shaft of equipment under test.When work, send tach signal by sensor, and, again both are offered simultaneously the digital test instrument by permanent magnetism small power generator output power supply, make its operate as normal.
The beneficial effects of the utility model are: externally do not have under the situation of powering and still can normally use digital rotational speed meters.Make things convenient for the use of digital rotational speed meters and expanded its use occasion.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a system block diagram of the present utility model
Fig. 2 is the structural representation of self-power digital rotational speed meters embodiment
In Fig. 2, tested equipment turning axle (1), connector (2), shell (3), permanent magnetism small power generator (4), generator out-put supply line (5), round turntable (6), permanent-magnet steel (7), hall element sensor (8), power rectifier stabilizing circuit plate (9), steady operation power supply output line (using) (10), steady operation power supply output line (using) (11), tach signal output line (12), digital testing system (13) for sensor for digital testing system.
Embodiment
Equipment under test turning axle drive permanent magnetism small power generator and speed probe rotate synchronously in Fig. 1, the electric energy that the permanent magnetism small power generator sends becomes voltage-stabilizing working power supply behind the power rectifier stabilizing circuit, flow to speed probe and digital test instrument more respectively.Speed probe can be worked after obtaining working power, produces tach signal, this signal is delivered in the digital tachometer again, after the processing conversion of internal circuit, shows by charactron.
In Fig. 2, equipment under test turning axle (1) connects mutually by the rotating shaft of hookup (2) with permanent magnetism small power generator (4), make the other end of generator (4) rotating shaft fix a round turntable (6), lay the fritter permanent-magnet steel (7) [annotating 1] of some at round turntable near the place, outer.When equipment under test is worked, drive permanent magnetism small power generator (4) and round turntable (6) and rotate with speed.Permanent magnetism small power generator (4) produces electric energy and sends into rectification stabilizing circuit plate (9) through out-put supply line (5), again the steady operation power supply that produces is supplied with digital testing system (13) and hall element sensor (8) respectively by stabilized power source output line (10), (11).When being installed near the hall element sensor (8) the round turntable, hall element sensor (8) will send the corresponding rotating speeds signal, be sent in the digital testing system (13) by tach signal output line (12) during permanent-magnet steel (7) rotation on the dish of garden simultaneously.Digital testing system (13) correctly demonstrates the rotating speed of measuring again after internal circuit is handled conversion after obtaining working power and tach signal.Or export other control signals to external unit.
Wherein permanent magnetism small power generator (4), round turntable (6), permanent-magnet steel (7), hall element sensor (8), power rectifier stabilizing circuit plate (9), and generator out-put supply line (5), stabilized power source output line (10), (11), tach signal output line (12), be installed in the same shell (3), form an integral body.
Annotate 1: the magnet steel number determination method determines according to following formula
Z: magnet steel is counted n: rotating speed f: output signal frequency
As n=f n=10f when z=6 when getting z=60
Claims (2)
1, a kind of digital rotational speed meters, link by primary instrument speed probe and secondary instrument digital testing system, it is characterized in that increasing a permanent magnetism small power generator at speed probe and equipment under test turning axle junction, this permanent magnetism small power generator is driven by the equipment under test turning axle, produces electric energy and produce working power supply speed probe and digital testing system behind the current commutates stabilizing circuit.
2, digital rotational speed meters according to claim 1, it is characterized in that: speed probe part, permanent magnetism small power generator and power rectifier stabilizing circuit are installed in the same housing, form an integral body, thus a whole tach signal and the steady operation power supply of producing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122999 CN2742445Y (en) | 2003-12-30 | 2003-12-30 | Self powered digital tachometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122999 CN2742445Y (en) | 2003-12-30 | 2003-12-30 | Self powered digital tachometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742445Y true CN2742445Y (en) | 2005-11-23 |
Family
ID=35477913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320122999 Expired - Fee Related CN2742445Y (en) | 2003-12-30 | 2003-12-30 | Self powered digital tachometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2742445Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759070A (en) * | 2016-03-01 | 2016-07-13 | 侯如升 | Assembly type rotating shaft speed detector |
| EP3088848A2 (en) | 2015-04-30 | 2016-11-02 | BogArt Sp. z o.o. | System for measuring non-electrical values |
| CN110606547A (en) * | 2018-09-25 | 2019-12-24 | 青海洁神环境能源产业有限公司 | Rotating speed monitoring system for rotating body assembly of biological rotating disc reactor |
-
2003
- 2003-12-30 CN CN 200320122999 patent/CN2742445Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3088848A2 (en) | 2015-04-30 | 2016-11-02 | BogArt Sp. z o.o. | System for measuring non-electrical values |
| CN105759070A (en) * | 2016-03-01 | 2016-07-13 | 侯如升 | Assembly type rotating shaft speed detector |
| CN110606547A (en) * | 2018-09-25 | 2019-12-24 | 青海洁神环境能源产业有限公司 | Rotating speed monitoring system for rotating body assembly of biological rotating disc reactor |
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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: 20051123 Termination date: 20100201 |