CN1095547C - Acceleration type high sensitivity electromechanical transducer series - Google Patents
Acceleration type high sensitivity electromechanical transducer series Download PDFInfo
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- CN1095547C CN1095547C CN 96102910 CN96102910A CN1095547C CN 1095547 C CN1095547 C CN 1095547C CN 96102910 CN96102910 CN 96102910 CN 96102910 A CN96102910 A CN 96102910A CN 1095547 C CN1095547 C CN 1095547C
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Abstract
The present invention relates to an acceleration type high-sensitivity electromechanical sensor series which is mainly composed of an outer shell, an end cover, a pole shoe, permanent magnet steel, an inertia body (comprising a movable coil), a suspension spring sheet, a fixed coil frame, a fixed coil on the fixed coil frame, etc., wherein the movable coil and the fixed coil are connected in series. The present invention can convert weak mechanical vibration signals into easily measured electric signals. The present invention has the advantages of high sensitivity in frequency domains over 25HZ, high raising rate (larger than or equal to 6 db/oct), good linearity of phase-frequency curves, little distortion, high signal-to-noise ratio, high interference resistance, high stability and reliability and long service life. The electromechanical sensor series is mainly used as a seismometer in the field of conventional and high resolution seismic exploration.
Description
Technical field:
The invention belongs to the mechanical ﹠ electrical technology field, is a kind of sensor that faint mechanical oscillation signal can be converted to the electric signal of easy measurement.
Background technology:
Pickoff has been widely used in scientific researches such as seismic prospecting, engineering construction, safety monitoring and the production field.With the seismic prospecting of carrying out on land is example, and that generally uses at present both at home and abroad remains the velocity profile sensor.All belong to these row as homemade GS-20DX series, C-J1, C-J40, SSJ series etc.The principal character of velocity profile sensor is to produce the motional electromotive force that is directly proportional with its vibration velocity, and amplitude-versus-frequency curve is mesa-shaped, and the high-frequency seism signal response is not had load-carrying capacity, and its sensitivity is generally 0.20-0.70v/cm.s
-1Only be fit to seismic exploration routinely, be difficult to be applicable to the high-resolution seismic survey of mutual thin layer.The eighties U.S. in latter stage and Japan develop " eddy current seismometer ", also claim the acceleration type sensor.After this domestic some Counterfeit Items (as WY-GJ-4400) and the preproduction that some are not too successful of having occurred in succession.Their principal character is to produce the induced electromotive force that is directly proportional with the acceleration of its vibration, at it from free-running frequency f
oIn the frequency domain of 250 (or 300) HZ, amplitude versus frequency characte is the straight-line segment of an inclination, and its enhancing rate is 6dB/oct.In the frequency domain of f≤200HZ, its sensitivity is starkly lower than C-J40, thus aspect seismic exploration routinely not as good as the velocity profile sensor, and can not realize real high-resolution seismic survey.The state-of-the-art record of Daqing oil field shows; Above-mentioned two types sensor, the signal highest frequency that can collect for the t-2 layer is 40-50HZ, and is far apart apart from the index of 100-200HZ.
The utility model patent " pickoff " that the inventor applied in g day in June, 95 (patent No. is 95214805) is to belong to the acceleration type sensor.Enhancing rate to high frequency response can reach 10～12.5dB/oct, and higher sensitivity is arranged in high-frequency domain.Can be designed to sensitivity is: when f=100HZ, and K 〉=0.60v/cm.s
-1, when f=200HZ, K 〉=2.0v/cm.s
-1Sensor.Its very suitable high-resolution seismic survey, but since in the low frequency field its sensitivity lower, still too late velocity profile sensor in seismic exploration routinely.
Summary of the invention:
Purpose of the present invention provides a kind of acceleration type high sensitivity electromechanical transducer, and it overcomes all deficiencies of the prior art, has higher sensitivity, and the high-frequency seism signal response is had bigger load-carrying capacity again, and easy to manufacture, and cost is lower.
The object of the present invention is achieved like this: a kind of acceleration type high sensitivity electromechanical transducer, which comprises at least outer cover body, the alignment circle, moving winding, magnet steel and cylindrical tube shape conductor, twine in the wherein affixed shell and on the alignment frame of end cap coil formation alignment circle is set, moving winding winding around on the moving-wire frame constitutes moving winding, magnet steel is arranged on body center, fix by pole shoe up and down, pendulum spring one end is provided with on the pole shoe end, the other end of pendulum spring is arranged on the jump ring place on the cylindrical tube shape conductor, cylindrical tube shape conductor, the corresponding arranged outside alignment circle on magnet steel pole shoe top; Moving winding is arranged on the top of bottom pendulum spring one end, pole shoe position, the corresponding bottom of level, the top and the bottom jump ring of pegging graft with the sleeve pipe that is axially disposed within moving winding and cylindrical tube shape conductor, cylindrical tube shape conductor and pendulum spring, top and the bottom pendulum spring one end constitutes coasting body.Pendulum spring is 6 arm shapes.End cap is provided with binding post series connection moving winding and alignment circle.
Described alignment circle, coasting body are provided with symmetrically by isolated body on an outer cover body, be divided into top and the bottom, the top and the bottom coasting body is connected in one by isolated body, and alignment circle, moving winding coil winding-direction in its top and the bottom are opposite, so that further improve the sensitivity of sensor.
Its present invention promptly has the sensor of fixed coil and movable coil, can the full use Faraday's electromagnetic induction law.When coasting body during in the magnetic gap internal vibration, produce induced electromotive force in the fixed circle, produce motional electromotive force in the moving-coil, and make the two by equidirectional series connection, the total electromotive force amplitude is increased, have the high sensitivity of acceleration transducer, the overall characteristic of high enhancing rate.Adopt the big magnet steel of remanent magnetism and magnetic energy product to produce high-intensity magnetic field, to improve electromechanical conversion coefficient and sensitivity.
Exciting signal frequency of the present invention is when 30≤f≤300HZ, has higher sensitivity, the high-frequency seism signal response had bigger load-carrying capacity again, promptly applicable to seismic exploration routinely, be specially adapted to the novel sensor of high-resolution seismic survey again, solve high-resolution seismic survey field focal issue anxious to be solved.
Description of drawings:
Fig. 1 is an embodiment of the present invention basic structure synoptic diagram;
Fig. 2 is that basic wiring of Fig. 1 embodiment and magnetic field produce synoptic diagram;
Fig. 3, Fig. 4 are the embodiment basic structure synoptic diagram of one for coasting body of the present invention;
Fig. 5, Fig. 6, Fig. 7 are split up into two parts for coasting body among the present invention, and wherein two groups of moving-coils reach and decide the structural representation that circle also can respectively be divided into a part;
Fig. 8 connects the synoptic diagram of embodiment for split type binding post among the present invention;
Fig. 9 is amplitude-versus-frequency curve figure of the present invention;
Figure 10 is a phase-frequency characteristic curve map of the present invention;
Figure 11 is a kind of specific embodiment reference data of the present invention figure;
Figure 12 is one of Figure 11 embodiment resonse characteristic figure;
Figure 13 is two of resonse characteristic figure of the present invention;
Figure 14 is Figure 11 embodiment phase place, frequency characteristic curve diagram;
Figure 15 is the another specific embodiment reference data of the present invention figure
Figure 16 is one of Figure 15 embodiment resonse characteristic figure;
Figure 17 is Figure 15 embodiment phase place, frequency characteristic curve diagram;
Figure 18 is a pendulum spring structural representation of the present invention.
Embodiment:
In conjunction with the accompanying drawings the present invention is specified as follows.
Referring to Fig. 1, the present invention with isolated body 6 be the center be divided into the identical substantially two parts of upper and lower structure and element (lower part with identical number add " ' " expression), main difference is that upper and lower two groups of coils direction that detours is opposite.Top is mainly by shell 2, end cap 3, pole shoe 4,7, magnet steel 5, coasting body (comprising cylindrical tube shape conductor 11, sleeve pipe 12, moving framework 13, moving winding 14, jump ring 10,23), encloses framework 15 surely, encloses 16 surely, formation such as spring leaf 9,22.Surely enclose frame fixation on shell 2 or end cap 3, be wound with the enameled wire of certain number of turn in its wire casing, magnet steel is compressed by end cap, pole shoe and isolated body etc. and is fixed together with shell, spring leaf 9 and the inside of 22 are respectively by end cap, pole shoe and isolated body clamp, and their outside is fixed on the coasting body by jump ring, make coasting body be in free suspension status, and can vibration vertically in magnetic gap.Upper and lower two parts coasting body is fixed by sleeve pipe 24 and is become one; Said elements all is coaxial.
The order of connection of each element in Fig. 2 indication circuit, arrow points is that circuit follows line direction among the figure, when external circuit is closed, also is the possible direction of electric current.The element binding is in proper order: binding post 1 → enclose surely 16 → binding post, 25 → shape of a hoof lug plate 8 → and through cylindrical drum 11 and sleeve pipe 12 outside surfaces → moving-coil 14 → through sleeve pipe 26 surfaces → moving-coil 14 ' → through the outside surface → spring leaf 9 ' and the lug plate 1 ' of sleeve pipe 12 ' and cylindrical tube 11 ' → enclose surely 16 ' → lug plate 18 ' → magnet steel 5 ', → wiring spring 17 → magnet steel, 5 → lug plate and binding post 18.
The span of main element: the Br=0.90-1.40T of permanent-magnet steel 5, optimum range are Br=1.3 ± 0.1T, and diameter is Φ 14-25mm, and optimum range is Φ 20 ± 2mm, high h=7-30mm, and optimum range should be decided according to version.Surely enclose number of turn N1=2X (2000-5000), optimum range is N1=2X (2500 ± 300), line footpath Φ 0.08-0.09mm, the moving-coil number of turn is N2=2X (500-2000), optimum range is N2=2X (1500 ± 250), line footpath Φ 0.05-0.09mm, the coasting body gross mass is m=15-70g, optimum range is m=30 ± 10g.
The present invention can be evolved into multiple version, fuses as making upper and lower coasting body 11,11 ', shown in Fig. 1,3,4; Also can with enclose 16 and 16 ' surely, moving-coil 14 and 14 ' surrounds upper and lower magnet steel respectively, becomes the mode that eddy current sensor and velocity profile sensor are contacted mutually, as Fig. 6, shown in Figure 7; Also available isolated body separates upper and lower two parts, forms separately independently novel sensor, with wiring 17 upper and lower two parts coil is linked by aforementioned manner then, as shown in Figure 5; More than various versions all can cross-section opening be divided into two independent sectors from the centre, be respectively charged into two independently in the shell, connect by binding post by aforementioned manner with wiring then, as shown in Figure 8, do not draw one by one herein.The various multi-form characteristics that all have separately, as the coasting body that is connected as a single entity make sensor that same free-running frequency (f be arranged
o) and ratio of damping (β
o), but the coasting body quality is big, and high frequency characteristics will differ from, and volume is slightly larger; As shown in Figure 7 be divided into two freestanding, the quality of coasting body is little, high frequency characteristics is quite a lot of, volume can be littler, but increased the homogeneity error.
If corresponding magnet steel S (N) utmost point of moving winding in the sensor, the certain corresponding N of another moving-coil (S) utmost point (can be same magnet steel, as Fig. 7, also different magnet steel be as Fig. 1 etc.) so.In fact Fig. 5 separately promptly becomes two independent parts separately from the centre, and each part is all represented the present invention.But above various forms all has two moving-coils, the Shuan Dingquan of reverse coiling, its objective is increase sensitivity, eliminates the interference of external electromagnetic field as far as possible, improves signal to noise ratio (S/N ratio).
Provide several embodiments of the present invention below: the physical dimension of element is seen Figure 11.
(1) physical parameter (temperature t=20 ℃), the residual magnetic flux density Br=1.4T of magnet steel (it is said present scientific research index), surely enclose number of turn N (1)=2350, line directly is Φ 0.09mm, moving-coil number of turn N (2)=1400, line footpath Φ 0.06mm, two groups of coil all-in resistance R=2.500K Ω up and down, if load R=20K Ω, then voltage transmission than γ=88.9% about.Coasting body gross mass m=32.5g, ratio of damping β
o(electromagnetic damping of coasting body during f=0) is 2.45, free-running frequency f
o=40HZ.Go out electromechanical conversion coefficient by these calculation of parameter, go out the characteristic response data of different frequency, see Table 1,2, concrete curve such as Fig. 9,10 by amplitude versus frequency characte and phase-frequency characteristic Equation for Calculating.
Main performance index of the present invention be (1) when exciting signal frequency f=40HZ, sensitivity K 〉=0.20v/cm.s
-1, when f=200HZ, K 〉=1.20v/cm.s
-1When f≤20HZ, the signal response enhancing rate is 8-12dB/oct, when the HZ of 20≤f≤250 (or 300), and enhancing rate 〉=6dB/oct; (2) when 30≤f≤250HZ, the phase-frequency characteristic curve is near straight line; (3) signal distortion is little, antijamming capability is strong, favourable identity, job stability and good reliability, life-span are long.
Table-1 amplitude versus frequency characte data (fo=40HZ β o=2.45)
| f(HZ) | 5 | 8 | 10 | 15 | 20 | 30 |
| K(v/cm.s -1) | 0.0244 | 0.0528 | 0.0732 | 0.125 | 0.176 | 0.276 |
| f(HZ) | 40 | 60 | 100 | 150 | 200 | 300 |
| K(v/cm.s -1) | 0.375 | 0.570 | 0.963 | 1.47 | 2.00 | 3.09 |
| f(HZ) | 400 | 500 | 600 | 800 | 1000 | |
| K(v/cm.s -1) | 3.49 | 4.42 | 4.45 | 4.70 | 4.73 |
Table-2 phase-frequency characteristic data (fo=40HZ β o=2.45)
| f(HZ) | 1 | 2 | 3 | 5 | 8 | 10 | 15 |
| Φ | -7°51′ | -13°34′ | -19°46′ | -31°6′ | -43°10′ | -49°40′ | -61°46′ |
| f(HZ) | 20 | 30 | 40 | 60 | 100 | 150 | 200 |
| Φ | -68°27′ | -76°17′ | -80°38′ | -85°47′ | -91°27′ | -96°34′ | -101°20′ |
| f(HZ) | 300 | 400 | 500 | 600 | 800 | 1000 | |
| Φ | -113°49′ | -126°32′ | -137°54′ | -146°20′ | -155°59′ | -162°10′ |
(2) if make the coasting body cylindrical drum with fine aluminium, magnet steel Br=1.30T, free-running frequency fo=40HZ β o=2.40, coil turn is still as above-mentioned, then can be regarded as amplitude-frequency and phase-frequency characteristic data as table-3,4, among curve such as Figure 12 1, if load R=20K Ω, then the amplitude versus frequency characte data are as table-5, and family curve is shown in curve among Figure 12 2.
Table-3 amplitude versus frequency characte data (fo=40HZ β o=2.40)
| F(HZ) | 5 | 8 | 10 | 15 | 20 | 30 |
| K(v/cm.s -1) | 0.0215 | 0.0471 | 0.0649 | 0.111 | 0.157 | 0.249 |
| F(HZ) | 40 | 60 | 100 | 150 | 200 | 300 |
| K(v/cm.s -1) | 0.336 | 0.517 | 0.884 | 1.393 | 1.89 | 2.83 |
| F(HZ) | 400 | 500 | 600 | 800 | 1000 | |
| K(v/cm.s -1) | 3.38 | 3.61 | 3.70 | 3.83 | 3.74 |
Table-4 phase-frequency characteristic data (fo=40HZ β o=2.40)
| f(HZ) | 1 | 2 | 3 | 5 | 8 | 10 | 15 |
| Φ | -6°58′ | -13°16′ | -19°31′ | -30°46′ | -43°57′ | -50°0′ | -61°8′ |
| f(HZ) | 20 | 30 | 40 | 60 | 100 | 150 | 200 |
| Φ | -67°56′ | -75°43′ | -80°1′ | -85°6′ | -91°7′ | -97°10′ | -103°57′ |
| f(HZ) | 300 | 400 | 500 | 600 | 800 | 1000 | |
| Φ | -119°43′ | -134°30′ | -143°52′ | -151°19′ | -159°29′ | -164°8′ |
Amplitude versus frequency characte data (fo=40HZ β o=2.45) when table-5 has load
| f(HZ) | 5 | 8 | 10 | 15 | 20 | 30 |
| K(v/cm.s -1) | 0.0192 | 0.0414 | 0.0572 | 0.100 | 0.138 | 0.217 |
| f(HZ) | 40 | 60 | 100 | 150 | 200 | 300 |
| K(v/cm.s -1) | 0.295 | 0.451 | 0.775 | 1.21 | 1.67 | 2.53 |
| f(HZ) | 400 | 500 | 600 | 800 | 1000 | |
| K(v/cm.s -1) | 3.05 | 3.27 | 3.34 | 3.32 | 3.23 |
(3) based on Fig. 9 key dimension, magnet steel Br=1.20T, the moving-coil number of turn is N (2)=1275 circle, fixed circle is 2700 circles, the coasting body gross mass is 31.7g, and free-running frequency fo=35HZ ratio of damping β o=2.40 is when external circuit is non-loaded, calculate amplitude-frequency and phase-frequency characteristic data shown in table-6,7, family curve is shown in Figure 13,14.Made exemplar by this standard, the preliminary survey effect is fine.
Table-6 amplitude versus frequency characte data (fo=35HZ β o=2.40)
| f(HZ) | 5 | 8 | 10 | 15 | 20 | 30 |
| K(v/cm.s -1) | 0.0272 | 0.0572 | 0.0784 | 0.1315 | 0.1835 | 0.285 |
| f(HZ) | 40 | 60 | 100 | 150 | 200 | 300 |
| K(v/cm.s -1) | 0.384 | 0.582 | 0.938 | 1.45 | 1.92 | 2.83 |
Table-7 phase-frequency characteristic data (fo=35HZ β o=2.40)
| f(HZ) | 1 | 2 | 3 | 5 | 8 | 15 |
| Φ | -7°41′ | -15°10′ | -22°7′ | -34°8′ | -46°39′ | -64°51′ |
| f(HZ) | 30 | 60 | 100 | 150 | 200 | 300 |
| Φ | -78°46′ | -87°43′ | -90°5′ | -96°8′ | -106°0′ | -116°53′ |
(4) establish magnet steel Br=1.0T, the element physical dimension as shown in figure 17.Surely enclosing the number of turn is N (1)=2950 circle, line footpath Φ 0.09mm, the moving-coil number of turn is N (2)=850, line footpath Φ 0.06mm, coil all-in resistance R=2.348K Ω, the coasting body gross mass is 33g, free-running frequency fo=25HZ ratio of damping β o=2.50, calculate amplitude-frequency and phase-frequency characteristic data shown in table-8,9, family curve is shown in Figure 15,16.Figure 18 is the pendulum spring sheet.
Table-8 amplitude versus frequency characte data (fo=25HZ β o=2.50)
| f(HZ) | 5 | 8 | 10 | 15 | 20 | 30 |
| K(v/cm.s -1) | 0.0258 | 0.0499 | 0.0660 | 0.105 | 0.144 | 0.219 |
| f(HZ) | 40 | 60 | 100 | 150 | 200 | 300 |
| K(v/cm.s -1) | 0.294 | 0.439 | 0.725 | 1.12 | 1.45 | 2.17 |
Table-9 phase-frequency characteristic data (fo=25HZ β o=2.50)
| f(HZ) | 1 | 2 | 3 | 5 | 8 | 15 |
| Φ | -11°19′ | -21°26′ | -30°40′ | -43°32′ | -58°4′ | -72°5′ |
| f(HZ) | 30 | 60 | 100 | 150 | 200 | 300 |
| Φ | -83°36′ | -90°56′ | -96°38′ | -96°53′ | -101°37′ | -108°30′ |
Claims (5)
1, a kind of acceleration type high sensitivity electromechanical transducer, it comprises an outer cover body, it is characterized in that: it also is provided with the alignment circle, moving winding, magnet steel and cylindrical tube shape conductor, twine in the wherein affixed shell and on the alignment frame of end cap coil formation alignment circle is set, moving winding winding around on the moving-wire frame constitutes moving winding, magnet steel is arranged on body center, fix by pole shoe up and down, pendulum spring one end is provided with on the pole shoe end, the other end of pendulum spring is arranged on the jump ring place on the cylindrical tube shape conductor, cylindrical tube shape conductor, the corresponding arranged outside alignment circle on magnet steel pole shoe top; Moving winding is arranged on the top of bottom pendulum spring one end, pole shoe position, the corresponding bottom of level, the top and the bottom jump ring of pegging graft with the sleeve pipe that is axially disposed within moving winding and cylindrical tube shape conductor, cylindrical tube shape conductor and pendulum spring, top and the bottom pendulum spring one end constitutes coasting body.
2, acceleration type high sensitivity electromechanical transducer according to claim 1, it is characterized in that: described alignment circle, coasting body are provided with symmetrically by isolated body on described outer cover body, be divided into top and the bottom, alignment circle, moving winding coil winding-direction in its top and the bottom are opposite.
3, acceleration type high sensitivity electromechanical transducer according to claim 2 is characterized in that: described top and the bottom coasting body is connected in one by isolated body.
4, acceleration type high sensitivity electromechanical transducer according to claim 1 is characterized in that: described pendulum spring is 6 arm shapes.
5, acceleration type high sensitivity electromechanical transducer according to claim 1 is characterized in that: described end cap is provided with binding post series connection moving winding and alignment circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102910 CN1095547C (en) | 1996-03-08 | 1996-03-08 | Acceleration type high sensitivity electromechanical transducer series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102910 CN1095547C (en) | 1996-03-08 | 1996-03-08 | Acceleration type high sensitivity electromechanical transducer series |
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| Publication Number | Publication Date |
|---|---|
| CN1161456A CN1161456A (en) | 1997-10-08 |
| CN1095547C true CN1095547C (en) | 2002-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96102910 Expired - Fee Related CN1095547C (en) | 1996-03-08 | 1996-03-08 | Acceleration type high sensitivity electromechanical transducer series |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4451057B2 (en) * | 2002-12-27 | 2010-04-14 | シャープ株式会社 | Display device driving method, display device, and program thereof |
| CN1318862C (en) * | 2003-04-14 | 2007-05-30 | 威海双丰电子传感有限公司 | Acceleration earthquake sensor |
| CN100504443C (en) * | 2006-04-18 | 2009-06-24 | 赵鸣 | Vibration feature sensor |
| CN102901982B (en) * | 2012-11-14 | 2017-05-03 | 赛思地球物理科技有限公司 | Dual-output end geophone |
| CN102901983B (en) * | 2012-11-16 | 2016-09-28 | 西安森舍电子科技有限责任公司 | A kind of Dual-output end composite geophone |
| CA2840916C (en) * | 2013-04-02 | 2016-11-01 | Sas E&P Ltd. | Dual-coil geophone accelerometer |
| US9348043B2 (en) | 2013-04-02 | 2016-05-24 | Sas E&P Ltd. | Multi-coil multi-terminal closed-loop geophone accelerometer |
| CN105402298B (en) * | 2015-12-29 | 2018-02-02 | 中国科学院测量与地球物理研究所 | Electromagnetic damper equilibrium feedback system |
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1996
- 1996-03-08 CN CN 96102910 patent/CN1095547C/en not_active Expired - Fee Related
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| CN1161456A (en) | 1997-10-08 |
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