CN2241329Y - Low frequency vibration speed sensor - Google Patents
Low frequency vibration speed sensor Download PDFInfo
- Publication number
- CN2241329Y CN2241329Y CN 95214271 CN95214271U CN2241329Y CN 2241329 Y CN2241329 Y CN 2241329Y CN 95214271 CN95214271 CN 95214271 CN 95214271 U CN95214271 U CN 95214271U CN 2241329 Y CN2241329 Y CN 2241329Y
- Authority
- CN
- China
- Prior art keywords
- frequency vibration
- coil
- thimble
- shell
- low frequency
- 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
Links
- 238000013016 damping Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000010437 gem Substances 0.000 claims abstract description 8
- 229910001751 gemstone Inorganic materials 0.000 claims abstract description 8
- 230000010355 oscillation Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to the structural design of a low frequency vibration speed sensor, comprising an outer shell, two thimble jewel bearings which are fixed in the shell body, an eccentric inertia damping ring which is supported by the thimble jewel bearings, a torsion spring, a coil, two magnetic steels which are sheathed in the coil and are provided with two opposite polarities, and a roofing magnetic steel which is inserted into the damping ring. The utility model has the advantages of easy manufacturing, simple installation, small volume and light weight, causes the measuring frequency to 1H< z > and the amplitude to lower to 50 mm, and satisfies the requirements of various situations measuring the low frequency vibration.
Description
The utility model belongs to the sensor technical field of measuring vibrations, particularly the structural design of low-frequency vibration speed pickup.
The frequency of utilization scope of inertia-type vibrating speed sensors, generally at 10-1000Hz, this series products uses very extensive at home and abroad.And when survey frequency during in this frequency range of 1-10Hz, above-mentioned universal sensor just can not meet the demands, but all is absolutely necessary at field low frequency vibration measurements such as hydrogenerator, railway, bridge, skyscraper and boats and ships.Be used for low frequency vibration measurement at present and mainly contain two quasi-instruments, a kind of is seismograph, its structure is comparatively complicated, it is mainly used in the monitoring of earthquake, another kind is to add compensating circuit on universal vibrating speed sensors, with the expansion low-frequency performance, the PR9266 vibration velocity vibro-pickup of for example Dutch PHILIPS company.
The purpose of this utility model is for overcoming the weak point of prior art, designs a kind of low-frequency vibration speed pickup of the novel uniqueness of being made up of the oscillation system that links to each other with measurand and two magnetic circuits, to satisfy the needs of the following frequency range vibration survey of 10Hz.
The utility model is designed a kind of low-frequency vibration speed pickup, by shell, be fixed in this shell two thimble jewel bearings of both sides relatively, by this thimble jewel bearing supporting, the oscillation system that coaxial successively continuous eccentric inertia damping ring, torsion spring, coil are formed is fixed in the said shell respectively and is placed in two relative magnet steel of polarity among the said coil and the tile-shaped magnet steel that inserts in the said damping ring is formed.Principle of work of the present utility model is: shell is fixed on the measuring object.When shell vibrates with measured vibrating object, eccentric inertia damping ring is received as the angular velocity of doing swing around the thimble axis with the vibration velocity of shell, coil produces identical swing in magnetic gap, therefore, generate the voltage signal that is directly proportional with vibration velocity in the coil, can measure vibration velocity vertical by the object that shaken, horizontal direction by secondary instrument.The formed magnetic circuit of damping ring and tile-shaped magnet steel constitutes an electromagnetic eddy damper, for instrument provides suitable damping.
The utility model has the advantages that: novel, structure is ingenious, and processing is easily installed simply, and volume is little, and is in light weight, and starting material are based on domestic, so cost is lower.Maximum characteristics are: survey frequency is low to moderate 1Hz, and amplitude can be surveyed to 50mm.
Brief Description Of Drawings:
Accompanying drawing 1 is a kind of example structure synoptic diagram of the utility model.
The utility model is designed a kind of low-frequency vibration speed pickup embodiment, elaborates the structure of present embodiment below in conjunction with Fig. 1.
Present embodiment mainly is made up of shell (1), eccentric inertia damping ring (2), torsion spring (3), square coil (4), thimble jewel bearing (5), bow type magnet steel (6) and a watt type magnet steel (7).By eccentric inertia damping ring (2), the oscillation system that torsion spring (3) and square coil (4) are formed, be bearing on the shell (1) by two thimble jewel bearings (5), two relative arc magnet steel (6) and outer magnetic pole cover (8) composition magnetic circuits of magnetic pole are fixed on the shell (1) by curved frame (9), and a tile-shaped magnet steel (7) is fixed with a watt seat (10) and shell (1) and also constituted one magnetic path with it.When shell (1) vibrates with tested vibrating object, eccentric inertia damping ring (2) produces relative swing with square coil (4) in the magnetic gap of two magnetic circuits, the former produces current vortex to provide oscillation system essential damping, and the latter generates electromotive force and measures to secondary instrument so that vibration signal to be provided.
Claims (1)
1, a kind of low-frequency vibration speed pickup, it is characterized in that by shell, be fixed in this shell two thimble jewel bearings of both sides relatively, by this thimble jewel bearing supporting, the oscillation system that coaxial successively continuous eccentric inertia damping ring, torsion spring, coil are formed is fixed in the said shell respectively and is placed in two relative magnet steel of polarity among the said coil and the tile-shaped magnet steel that inserts in the said damping ring is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95214271 CN2241329Y (en) | 1995-06-30 | 1995-06-30 | Low frequency vibration speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95214271 CN2241329Y (en) | 1995-06-30 | 1995-06-30 | Low frequency vibration speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2241329Y true CN2241329Y (en) | 1996-11-27 |
Family
ID=33863945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95214271 Expired - Fee Related CN2241329Y (en) | 1995-06-30 | 1995-06-30 | Low frequency vibration speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2241329Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101516A (en) * | 2014-07-22 | 2014-10-15 | 威海中测测试科技有限公司 | Minitype magnetoelectric speedometer |
| CN111032460A (en) * | 2017-08-31 | 2020-04-17 | 克诺尔轨道车辆系统有限公司 | Brake actuator for a rail vehicle |
-
1995
- 1995-06-30 CN CN 95214271 patent/CN2241329Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101516A (en) * | 2014-07-22 | 2014-10-15 | 威海中测测试科技有限公司 | Minitype magnetoelectric speedometer |
| CN104101516B (en) * | 2014-07-22 | 2016-07-06 | 威海中测测试科技有限公司 | Miniature magnetoelectricity velometer |
| CN111032460A (en) * | 2017-08-31 | 2020-04-17 | 克诺尔轨道车辆系统有限公司 | Brake actuator for a rail vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |