CN104101516A - Minitype magnetoelectric speedometer - Google Patents
Minitype magnetoelectric speedometer Download PDFInfo
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- CN104101516A CN104101516A CN201410350949.4A CN201410350949A CN104101516A CN 104101516 A CN104101516 A CN 104101516A CN 201410350949 A CN201410350949 A CN 201410350949A CN 104101516 A CN104101516 A CN 104101516A
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Abstract
The invention relates to a minitype magnetoelectric speedometer, and aims to solve the technical problems that the conventional detector is poor in anti-interference capability, low in precision, narrow in frequency band, and relatively higher in distortion. The speedometer comprises a magnetic-conductive casing, wherein the magnetic-conductive casing is connected with an upper cover and a lower cover; two leading-out terminals are arranged on the upper cover; one of the two leading-out terminals is a positive pole leading-out terminal, while the other leading-out terminal is a negative pole leading-out terminal; an adjustable circuit module is connected with the two leading-out terminals. According to the invention, the speedometer can be widely applied to low frequency sensors used in the fields of seismic prospecting and vibration detecting.
Description
Technical field
The low frequency sensor that the present invention relates to a kind of seismic prospecting, the use of vibration detection field, particularly relates to a kind of miniature magnetoelectricity velograph.
Background technology
Moving-coil geophone is the conventional sensors of using for seismic prospecting and engineering survey, and it is converted to ground vibration the electric signal being directly proportional to vibration velocity, is mechanical energy to be converted into the device of electric energy.Existing moving-coil geophone low frequency signal receiving ability is poor, there is the technological deficiency that interference performance is poor, precision is low, frequency band is narrow, distortion is relatively high, for accepting, deep reflex ripple is unfavorable, can not meet the needs of current high precision exploration, has restricted the further lifting of data acquisition quality.So, the low frequency performance that improves wave detector is vital for improving seismic prospecting data collecting quality, this external engineering detecting, building monitoring and bridge detection field also need to accept low frequency signal, and conventional sensor bulk is large, heavy, use inconvenient.
Summary of the invention
The present invention, in order to solve the technical matters that existing wave detector low frequency signal interference performance is poor, precision is low, frequency band is narrow, distortion is relatively high, provides the miniature magnetoelectricity velograph that a kind of low frequency signal receiving ability is strong.
The present invention is by dynamo-electric combination, and by the external conditioned circuit module of conventional wave detector, design philosophy is the leading-out terminal parallel impedance translation circuit at wave detector, improves the performance of conventional wave detector.
The invention provides a kind of miniature magnetoelectricity velograph, comprise magnetic conduction casing, magnetic conduction casing is connected with upper cover and lower cover, on be covered with two leading-out terminals, two one of leading-out terminals are anodal leading-out terminals, and another is negative pole leading-out terminal, and two leading-out terminals are connected with conditioned circuit module.
Preferably, conditioned circuit module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity, one end of one end of one end of one end of the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity is joined together to form common port, and this common port is connected with anodal leading-out terminal; One end of one end of one end of the second resistance, the 3rd resistance, the 4th resistance is joined together to form common port, and this common port is connected with negative pole leading-out terminal; The other end of the 3rd resistance is connected with the other end of the first electric capacity, the other end of the second electric capacity respectively after linking together with the other end of the 4th resistance; The first resistance is connected between anodal leading-out terminal and negative pole leading-out terminal.
Preferably, conditioned circuit module also comprises encapsulation protective case and PCB double-sided wiring board, and encapsulation protective case is located at and is covered, PCB double-sided wiring board by epoxy encapsulation in encapsulation protective case; The first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th condenser welding are connected on PCB double-sided wiring board.
Preferably, encapsulation protective case is metal protective case, and its surface is provided with nickel coating.
Preferably, be provided with magnet steel in magnetic conduction casing, magnet steel top is connected with magnetic boots, magnet steel bottom is connected with lower magnetic boots, between upper magnetic boots and lower magnetic boots and the inwall of magnetic conduction casing, be provided with coil rack, coil rack top is provided with the coiling window mating with upper magnetic boots, and linear window is provided with coil; Coil rack bottom is provided with the coiling window mating with lower magnetic boots, and this coiling window is provided with coil; Upper and lower two groups of coils around on the contrary, two leading-out terminals are connected with two groups of coils respectively; The upper end of coil rack is connected with upper magnetic boots by upper spring sheet, and the bottom of coil rack is connected with lower magnetic boots by lower spring sheet.
Preferably, the inner face of upper magnetic boots is provided with convex platform, and the inner face of lower magnetic boots is provided with lower convex platform, the diameter of convex platform and lower convex platform and the equal diameters of magnet steel.
Preferably, magnet steel is to be Nd-Fe-B magnet steel.
The invention has the beneficial effects as follows, the miniature magnetoelectricity velocity profile low frequency sensor that adopts dynamo-electric combination, free-running frequency is 2Hz, broadening low frequency end working band, and the signal reception of low frequency end and reception stability have obvious lifting, can accept reliably deep layer bass reflex ripple.Improved the acquisition quality of signal sampler.
As shown in Figure 4, the family curve that A curve is existing wave detector, B curve is family curve of the present invention, as we know from the figure, in the working band of A curve, flat segments is 6-250Hz, and in B curve working band, flat segments is 2-250Hz, higher, the good linearity of remolding sensitivity, bandwidth during 2Hz.
Further aspect of the present invention, by the description of following embodiment, is clearly recorded.
Accompanying drawing explanation
Fig. 1 is the structural representation of wave detector body of the present invention;
Fig. 2 is the structural representation of conditioned circuit module of the present invention;
Fig. 3 is the physical circuit figure of conditioned circuit module;
Fig. 4 is family curve comparison diagram;
Fig. 5 is giving an example of conditioned circuit module adjustment;
Fig. 6 is giving an example of conditioned circuit module adjustment.
Reference numeral explanation:
1. leading-out terminal; 2. upper cover; 3. thin type sealing; 4. upper spring sheet; 5. go up magnetic boots; 6. coil; 7. coil rack; 8. magnetic conduction casing; 9. descend magnetic boots; 10. lower spring sheet; 11. thin type sealings; 12. lower covers; 13. magnet steel; 14. wave detector bodies; 15. encapsulation protective cases; 16. circuit boards; 17. output pins; 18. electron devices; 19. epoxy resin; R1, R2, R3, R4 are respectively the first resistance, the second resistance, the 3rd resistance, the 4th resistance, and C1, C2, C3, C4 are respectively the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity.
Embodiment
As shown in Figure 1, wave detector body of the present invention comprises magnetic conduction casing 8, upper cover 2 is fixedly connected with the upper end of magnetic conduction casing 8, lower cover 12 is fixedly connected with the lower end of magnetic conduction casing 8, thin type sealing 3 is located between upper cover 2 and the upper end of magnetic conduction casing 8, and thin type sealing 11 is located between lower cover 12 and the lower end of magnetic conduction casing 8.
The inside of magnetic conduction casing 8 is provided with magnet steel 13, and magnet steel 13 tops are connected with magnetic boots 5, and magnet steel 13 bottoms are connected with lower magnetic boots 9.Between upper magnetic boots 5 and lower magnetic boots 9 and the inwall of magnetic conduction casing 8, be provided with coil rack 7.Coil rack 7 tops are provided with the coiling window mating with upper magnetic boots 5, and this coiling window is provided with coil 6; Coil rack 7 bottoms are provided with the coiling window mating with lower magnetic boots 9, and this coiling window is provided with coil 6.Upper and lower two groups of coils 6 around on the contrary.
The upper end of coil rack 7 is connected with upper magnetic boots 5 by upper spring sheet 4, and the bottom of coil rack 7 is connected with lower magnetic boots 9 by lower spring sheet 10.Two leading-out terminals 1 that pass from upper cover 2 are connected with two groups of coils 6 respectively.
The inner face of upper magnetic boots 5 is provided with convex platform, and the inner face of lower magnetic boots 9 is provided with lower convex platform, the equal diameters of the diameter of convex platform and lower convex platform and magnet steel 13; Magnet steel 13 can be to be Nd-Fe-B magnet steel.
Conditioned circuit module as shown in Figure 2, encapsulation protective case 15 be arranged on wave detector body 14 on cover, circuit board 16 by epoxy resin 19 be encapsulated in encapsulation protective case 15 in.Circuit board 16 is PCB double-sided wiring board, electron device 18 is welded on the pro and con of double-sided wiring board, the face bonding of double-sided wiring board is connected to two output pins 17 (being connected with external signal Acquisition Instrument), the reverse side of double-sided wiring board is also welded with two input pins, and two input pins of reverse side are connected with positive output pin 17.Two input pins are connected with two leading-out terminals 1 of wave detector body 14, two leading-out terminals 1 that is to say wave detector body 14 are drawn by two positive output pins 17 of double-sided wiring board, and two output pin 17 final output signal are to external signal Acquisition Instrument.Encapsulation protective case 15 can be metal protective case, outside surface Nickel Plating Treatment.After epoxy resin 19 is air-dry, be black, it has excellent bonding strength to the surface of metal material, and insulating property are good, and set shrinkage factor is little, good stability of the dimension, and hardness is high, and pliability is better.
As shown in Figure 3, electron device 18 comprises the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4, one end of the first capacitor C 1, one end of the second capacitor C 2, one end of one end of the 3rd capacitor C 3 and the 4th capacitor C 4 is joined together to form common port, two input pins of this common port and double-sided wiring board reverse side anodal pin is wherein connected, unsettled do not connect (number in the figure 1) of the other end of the 4th capacitor C 4, unsettled do not connect (number in the figure 2) of the other end of the 3rd capacitor C 3.One end of one end of one end of the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 is joined together to form common port, two input pins of this common port and double-sided wiring board reverse side negative pole pin is wherein connected, unsettled do not connect (number in the figure 3) of the other end of the second resistance R 2.The other end of the 3rd resistance R 3 is connected with the other end of the first capacitor C 1, the other end of the second capacitor C 2 respectively after linking together with the other end of the 4th resistance R 4.The first resistance R 1 is connected between negative pole pin and anodal pin, the one end that is to say the first resistance R 1 is connected with the common port of the 4th resistance R 4 with the second resistance R 2, the 3rd resistance R 3, and the other end of the first resistance R 1 is connected with the common port of the 4th capacitor C 4 with the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3.
The free end of the free end of the free end of the 4th capacitor C 4, the 3rd capacitor C 3 and the second resistance R 2 is as adjustable side, can use these three free ends to be connected with other devices, to reach the effect of low frequency for the wave detector of different size.For example:
(1) for the VAS-100 model wave detector of test company limited in Weihai, its technical parameter is resistance: 3800 Ω ± 5%, sensitivity: 100V/M/S ± 5%.As shown in Figure 5, the free end of the 4th capacitor C 4 is connected with the node between the first capacitor C 1 and the 3rd resistance R 3, the 3rd capacitor C 3 and the second resistance R 2 are not used.
(2) for the VAS-200 model wave detector of test company limited in Weihai, its technical parameter is resistance: 43K Ω ± 5% sensitivity: 250V/M/S ± 5%.As shown in Figure 6, the free end of the 4th capacitor C 4 is connected with the node between the first capacitor C 1 and the 3rd resistance R 3, the free end of the 3rd capacitor C 3 is connected with the node between the first capacitor C 1 and the 3rd resistance R 3, the free end of the second resistance R 2 is connected with the node between the first capacitor C 1 and the 3rd resistance R 3.
The concrete specification of the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 can be: 47k Ω, 1k-10k Ω, 810-2k Ω, 7.5k-12k Ω, 0.68-1.47 μ F, 2-3 μ F, 1-3 μ F, 0.1-0.68 μ F.
The above,, only to the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Every in claim limited range of the present invention, any modification of making, be equal to replacement, improvement etc., all should be within protection scope of the present invention.
Claims (7)
1. a miniature magnetoelectricity velograph, comprise magnetic conduction casing, described magnetic conduction casing is connected with upper cover and lower cover, on described, be covered with two leading-out terminals, two one of leading-out terminals are anodal leading-out terminals, another is negative pole leading-out terminal, it is characterized in that, described two leading-out terminals are connected with conditioned circuit module.
2. miniature magnetoelectricity velograph according to claim 1, it is characterized in that, described conditioned circuit module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity, one end of one end of one end of one end of described the first electric capacity, described the second electric capacity, described the 3rd electric capacity and described the 4th electric capacity is joined together to form common port, and this common port is connected with described anodal leading-out terminal; One end of one end of one end of described the second resistance, described the 3rd resistance, described the 4th resistance is joined together to form common port, and this common port is connected with described negative pole leading-out terminal; The other end of described the 3rd resistance is connected with the other end of described the first electric capacity, the other end of described the second electric capacity respectively after linking together with the other end of described the 4th resistance; Described the first resistance is connected between described anodal leading-out terminal and described negative pole leading-out terminal.
3. miniature magnetoelectricity velograph according to claim 2, it is characterized in that, described conditioned circuit module also comprises encapsulation protective case and PCB double-sided wiring board, and described encapsulation protective case is located on described and is covered, described PCB double-sided wiring board by epoxy encapsulation in described encapsulation protective case; Described the first resistance, described the second resistance, described the 3rd resistance, described the 4th resistance, described the first electric capacity, described the second electric capacity, described the 3rd electric capacity and described the 4th condenser welding are connected on described PCB double-sided wiring board.
4. according to the miniature magnetoelectricity velograph described in claim 1,2 or 3, it is characterized in that, described encapsulation protective case is metal protective case, and its surface is provided with nickel coating.
5. according to the miniature magnetoelectricity velograph described in claim 1,2 or 3, it is characterized in that, in described magnetic conduction casing, be provided with magnet steel, described magnet steel top is connected with magnetic boots, described magnet steel bottom is connected with lower magnetic boots, between described upper magnetic boots and lower magnetic boots and the inwall of described magnetic conduction casing, be provided with coil rack, described coil rack top is provided with the coiling window mating with described upper magnetic boots, and this coiling window is provided with coil; Described coil rack bottom is provided with the coiling window mating with described lower magnetic boots, and this coiling window is provided with coil; Upper and lower two groups of coils around on the contrary, described two leading-out terminals are connected with described two groups of coils respectively; The upper end of described coil rack is connected with described upper magnetic boots by upper spring sheet, and the bottom of described coil rack is connected with described lower magnetic boots by lower spring sheet.
6. miniature magnetoelectricity velograph according to claim 5, is characterized in that, the inner face of described upper magnetic boots is provided with convex platform, and the inner face of described lower magnetic boots is provided with lower convex platform, the diameter of described convex platform and described lower convex platform and the equal diameters of described magnet steel.
7. miniature magnetoelectricity velograph according to claim 6, is characterized in that, described magnet steel is to be Nd-Fe-B magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350949.4A CN104101516B (en) | 2014-07-22 | 2014-07-22 | Miniature magnetoelectricity velometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410350949.4A CN104101516B (en) | 2014-07-22 | 2014-07-22 | Miniature magnetoelectricity velometer |
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| CN104101516A true CN104101516A (en) | 2014-10-15 |
| CN104101516B CN104101516B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410350949.4A Active CN104101516B (en) | 2014-07-22 | 2014-07-22 | Miniature magnetoelectricity velometer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2241329Y (en) * | 1995-06-30 | 1996-11-27 | 清华大学 | Low frequency vibration speed sensor |
| US20100296366A1 (en) * | 2009-05-25 | 2010-11-25 | Schlumberger Technology Corporation | Methods and systems for seismic signal detection |
| CN202710172U (en) * | 2012-08-09 | 2013-01-30 | 北京中元瑞讯科技有限公司 | Measuring device for low-frequency, small-amplitude vibration signal |
| CN103292892A (en) * | 2012-08-09 | 2013-09-11 | 北京中元瑞讯科技有限公司 | Method and device for measuring low-frequency and small-range vibration signals |
-
2014
- 2014-07-22 CN CN201410350949.4A patent/CN104101516B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2241329Y (en) * | 1995-06-30 | 1996-11-27 | 清华大学 | Low frequency vibration speed sensor |
| US20100296366A1 (en) * | 2009-05-25 | 2010-11-25 | Schlumberger Technology Corporation | Methods and systems for seismic signal detection |
| CN202710172U (en) * | 2012-08-09 | 2013-01-30 | 北京中元瑞讯科技有限公司 | Measuring device for low-frequency, small-amplitude vibration signal |
| CN103292892A (en) * | 2012-08-09 | 2013-09-11 | 北京中元瑞讯科技有限公司 | Method and device for measuring low-frequency and small-range vibration signals |
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| CN104101516B (en) | 2016-07-06 |
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Address after: The road of Weihai City area 264209 Shandong province No. 156 - layer Patentee after: Weihai Polytron Technologies Inc Address before: 264209 Weihai high tech Zone, Shandong Torch Road, No. 156 Patentee before: WEIHAI ZHONGCE TEST TECHNOLOGY CO., LTD. |