CN2144295Y - Active ultra-low-frequency servo-velocity meter - Google Patents
Active ultra-low-frequency servo-velocity meter Download PDFInfo
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- CN2144295Y CN2144295Y CN 92242152 CN92242152U CN2144295Y CN 2144295 Y CN2144295 Y CN 2144295Y CN 92242152 CN92242152 CN 92242152 CN 92242152 U CN92242152 U CN 92242152U CN 2144295 Y CN2144295 Y CN 2144295Y
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Abstract
The utility model discloses an active ultra-low-frequency servo-velocity meter, which is used for measuring ultra-low-frequency ultra-large vibration velocity and displacement, such as ocean wave height, a tall and slender structure, the travel length of oil pumping units, etc. The utility model is formed by applying the active servo technology to a reciprocating light-quality pendulum with high frequency of mechanical natural vibration. The low-frequency lower limit and the measurement range of the utility model can be adjusted conveniently through changing the parameters of a servo circuit. As a result, the utility model overcomes not only the defect that the low-frequency characteristic and the measurement range of passive type and passive servo magnetoelectric type vibration pickups can not be arbitrarily extended, but also a series of defects which are existing when accelerometers are used for measuring the amplitude of ocean wave through double integration. The utility model provides a new device for measurement of ultra-low-frequency ultra-large displacement.
Description
The utility model relates to vibration measuring instrument.It is that wave height, the oil pumper stroke for wave, the superlow frequency vibrating measurement of tall and slender structure provide a kind of new instrument.
At present, measurement existing corresponding instrument--" wave-measuring buoy " for the wave wave height, but what its survey sensor adopted is vibrating cord accelerometer, owing to need twice integration just can record the wave height of wave, so this system exists, and drift is big, transient response amplitude versus frequency characte error poor, low frequency reaches deficiencies such as transportation inconvenience greatly.For the vibration survey of surveying oil pumper stroke and tall and slender structure, also there is not the vibration measuring instrument of ultralow frequency wide range at present.
The utility model equal sensor of different " wave-measuring buoy " usefulness on structure and principle.On physical construction with reference to " passive servo formula toward the multi-functional vibro-pickup of physical pendulum " (designer: Yang Xueshan etc., the patent No.: 90204993.3), " realize the active servo principle of multi-functional superlow frequency vibrating surveying instrument " with reference to the article of Engineering Mechanics Inst., State Bureau of Earthquake in theory and the article of Guangdong Province seismological bureau " research of feedback vibration transducer ".
The purpose of this utility model provides a kind of novel superlow frequency vibrating surveying instrument.This instrument is to realize the direct measurement of long period speed amount and realize the measurement of ultralow frequency very large displacement through integration laying out of the reciprocating type high natural frequency of vibration of small size.It has overcome adopts accelerometer to survey a series of shortcomings that the wave wave height exists through twice integration.
Task of the present utility model realizes as follows, and ultralow frequency active servo formula velograph is by the housing that comprises base, shell, loam cake and comprise that the oscillator system of magnetic circuit, spring, quality and Circuits System form.Reciprocating type light pendulum and a circuit board that is welded with the active servo feedback circuit of a high natural frequency of vibration are housed in housing, and the output terminal of light cycloid circle links to each other with active servo feedback system circuit, constitutes the displacement pendulum velograph of the especially big range of ultralow frequency.On the coil rack of reciprocating type light pendulum, be wound with three groups of coil G
1, G
2And G
3The circuit board of active servo feedback system circuit is installed between armature and the loam cake, and wiring board is provided with servoamplifier, phase compensation, strengthens equivalent quality network, damping regulating networks, demarcates network and integrator certainly.Coil winding G wherein
3With demarcate the networking certainly and be connected, be used for demarcating sensitivity, amplitude versus frequency characte and the linearity of ultralow frequency velograph.Be connected to integrator at circuit board A point, can make the quantitative change of measured signal speed is that displacement is directly exported.
Principle of work of the present utility model is as shown in Figure 2: three groups of coil G on the same coil rack
1, G
2And G
3Be used separately as signal input, servo feedback and demarcation certainly.Under the situation of vibration, coil moves in the magnetic slit that permanent magnet, armature and yoke are formed, and produces voltage signal, coil winding G
1The voltage signal that produces is through servoamplifier, and phase compensation, increasing equivalent quality networking and damping are regulated the networking and fed back to coil winding G
2, form active servo feedback system.The voltage signal that takes out from the A point is proportional to the vibration velocity of measured point, can direct measuring vibrations displacement through an integration.
Advantage of the present utility model is volume little, in light weight (experimental prototype is 0.3kg only) low frequency characteristic good (low-frequency minimum of experimental prototype is 0.04Hz), range big (the model machine range is ± 20 meters), and can be by the expansion low-frequency characteristic easy to adjust and the measurement range of electrical quantity.Transportation is convenient in shock resistance.
Fig. 1 is the utility model orthogonal view
Fig. 2 is the utility model circuit block diagram
Most preferred embodiment of the present utility model as shown
Constitute housing by base (1), shell (2), loam cake (3), eng ring (4); Constitute magnetic circuit by permanent magnet (5), armature (6) and yoke (7); By coil former (8), three groups of coils (9), snap ring (12) and collar (13) component movement part quality on the coil former (8); This quality and reed (14) constitute the reciprocating type light pendulum of the high natural frequency of vibration, and this light pendulum is by sustained ring (11) supporting, when coil moves in magnetic circuit, produces voltage signal.By coil G
1The voltage signal that produces is input to the servoamplifier (16) that is installed in wiring board (15) between armature (6) and the loam cake (3) through binding post (10), regulates networking (19) and feeds back to second group of coil G through phase compensation (17), increasing equivalent quality networking (18), damping
2Below the A point, be connected to integrator (21).The 3rd group of coil G
3With demarcate the networking certainly and link to each other.
Claims (5)
1, a kind of ultralow frequency active servo formula velograph, it is made up of housing, oscillator system and Circuits System, it is characterized in that being equipped with in the housing the reciprocating type light pendulum of a high natural frequency of vibration, with a circuit board that is welded with active servo feedback, integrator and demarcates the networking certainly, light cycloid circle is connected with the active servo feedback circuitry, forms the displacement pendulum velograph of the especially big range of ultralow frequency.
2, velograph as claimed in claim 1 is characterized in that said reciprocating type light pendulum has a coil rack, is wound with three groups of coil G on it
1, G
2And G
3
3, velograph as claimed in claim 1 is characterized in that said active servo feedback circuit is provided with servoamplifier, phase compensation, increasing equivalent quality network and damping regulating networks.
4,, it is characterized in that said light cycloid circle winding G as claim 1,2 described velographs
3With demarcate network certainly and be connected.
5, velograph as claimed in claim 1 is characterized in that being installed in and also is provided with an integrator in the Circuits System on the circuit board, and the speed quantitative change that makes measured signal is that displacement is directly exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242152 CN2144295Y (en) | 1992-11-24 | 1992-11-24 | Active ultra-low-frequency servo-velocity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242152 CN2144295Y (en) | 1992-11-24 | 1992-11-24 | Active ultra-low-frequency servo-velocity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2144295Y true CN2144295Y (en) | 1993-10-20 |
Family
ID=33782031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92242152 Expired - Fee Related CN2144295Y (en) | 1992-11-24 | 1992-11-24 | Active ultra-low-frequency servo-velocity meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2144295Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575383A (en) * | 2012-07-24 | 2014-02-12 | 嘉兴市振恒电子技术有限责任公司 | Low-frequency multi-output passive servo vibration sensor capable of simultaneously measuring acceleration and velocity |
-
1992
- 1992-11-24 CN CN 92242152 patent/CN2144295Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575383A (en) * | 2012-07-24 | 2014-02-12 | 嘉兴市振恒电子技术有限责任公司 | Low-frequency multi-output passive servo vibration sensor capable of simultaneously measuring acceleration and velocity |
| CN103575383B (en) * | 2012-07-24 | 2016-09-21 | 嘉兴市振恒电子技术有限责任公司 | The low frequency multi output passive servo vibrating sensor of acceleration and speed can be measured simultaneously |
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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 |