CN203024725U - Magneto-dependent sensor applied to jacks - Google Patents
Magneto-dependent sensor applied to jacks Download PDFInfo
- Publication number
- CN203024725U CN203024725U CN 201320032220 CN201320032220U CN203024725U CN 203024725 U CN203024725 U CN 203024725U CN 201320032220 CN201320032220 CN 201320032220 CN 201320032220 U CN201320032220 U CN 201320032220U CN 203024725 U CN203024725 U CN 203024725U
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- magneto
- mistor
- sensing head
- dependent sensor
- utility
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model discloses a magneto-dependent sensor applied to jacks, which comprises a shell, the shell of a sensing head is composed of a bottom cover and an outer tube, a curing adhesive encapsulates a chip containing four magneto-dependent resistors and a magnet in the sensing head, signals of the sensing head are elicited and connected to a circuit board by a lead, one end of a cable is connected to the circuit board, and the other end of the cable can be connected to a computer. Two paths of addition-subtraction square signals are output by the magneto-dependent sensor disclosed by the utility model, can reflect the forward and reverse displacements of a piston rod of a jack, and can be directly connected to a microcomputer to carry out data processing.
Description
Technical field
[0001] the utility model relates to a kind of magneto-dependent sensor, relates in particular to a kind of magneto-dependent sensor that is applied to lifting jack.
Background technology
[0002] mistor its resistance under magnetic fields can change, and this magnetoresistance can be used as displacement detecting.The application of mistor on lifting jack, its principle be as shown in Figure 3: the magnetic line of force that produces when magnetite (21) passes mistor chip (22) and arrives when being with fluted piston rod (23), and its magnetic line of force is inhomogeneous.The magnetic line of force that passes mistor at the boss place is more, and is less at groove.When mistor chip and piston rod did relative motion, the magnetic line of force that passes mistor can produce regular strong and weak the variation, that is to say that the resistance of mistor can produce regular size variation.Magneto-dependent sensor is exactly to reach by the variation of measuring this resistance the purpose of measuring displacement.Eight magneto-dependent sensors adopt is bridge-type detection method as Fig. 2: the mistor chip has eight mistors, connects to form the two-way electric bridge by electrical lead.This two-way output consists of the incremental encoding signal.According to bridge theory, the resistance consistance of these eight mistors will be got well.At present, although domesticly can produce mistor, its performance does not reach above-mentioned requirements.Therefore the mistor of domestic production can only be used for other purposes, and can not be used on lifting jack.And abroad this chip as the high-tech product China that restricts export.Therefore can not find the mistor chip for lifting jack on the home market.
The utility model content
[0003] the purpose of this utility model is to reduce manufacture difficulty and the cost of manufacture of the special-purpose magnetosensitive resistor core of lifting jack sheet, dependence and the foreign technology restriction of minimizing to imported product, make and adopt the product of the utility model technology to be applied on lifting jack, and can meet or exceed precision and the performance of similar imported product.
[0004] for completing above-mentioned purpose, the utility model is realized by the following technical solutions:
A kind of magneto-dependent sensor that is applied to lifting jack, include bottom, bottom and outer tube consist of the housing of sensing head, solidifying glue is packaged in mistor chip and magnetite in sensing head, lead-in wire is drawn the signal of sensing head and is connected on circuit board, and one of cable is connected on the accessible computer in other end on circuit board.
A kind of magneto-dependent sensor that is applied to lifting jack is characterized in that: the mistor chip is made of side by side four resistance.
[0005] principle of work of the present utility model is as follows:
Adopt bridge-type trim testing circuit to carry out leveling to the nonuniformity of mistor, in order to further reduce the manufacture difficulty of mistor, adopt 20 cutting sub-circuits, the cutting of the incremental encoding signal in the 2mm cycle that detects is subdivided into the plus-minus counting signal of 0.1mm.
[0006] the beneficial effects of the utility model are:
Change by the chip that original eight mistors are formed the chip that four mistors form into, and bridge-type trim testing circuit and 20 cutting sub-circuits, reduce manufacture difficulty and the cost of manufacture of the special-purpose magnetosensitive resistor core of lifting jack sheet, and can reach the resolution of 0.1mm.
Description of drawings
Below in conjunction with embodiment, the utility model is described in detail.
[0008] Fig. 1 structural representation of the present utility model;
The bridge detection circuit figure of the magnetosensitive chip that Fig. 2 is comprised of eight mistors.
The structural drawing of magnetosensitive chip on lifting jack that Fig. 3 is comprised of four mistors.
Fig. 4 detects trim circuit figure by the bridge-type of the magnetosensitive chip that four mistors form.
Fig. 5 is circuit block diagram of the present utility model.
In figure: A1, A2, A3, A4, B1, B2, B3, B4 all represent mistor, 1: bottom, 2: the mistor chip, 3 and 21: magnetite, 4: solidify glue, 5: outer tube, 6: lead-in wire, 7: circuit board, 8: cable, 22: mistor, 23: the piston rod channel portions, 31,33,34,36: the plain metal film resistance, 32,35: potentiometer, 41:20 segments clipper circuit.
Embodiment
[0009] as shown in Figure 1, a kind of magneto-dependent sensor that is applied to lifting jack, include the housing that bottom (1) and outer tube (5) consist of sensing head, solidifying glue (4) is packaged in mistor chip (2) and magnetite (3) in sensing head, lead-in wire (6) is drawn the signal of sensing head and is connected on circuit board (7), and (8) one of cables are connected on the accessible computer in other end on circuit board.This output of products be two-way plus-minus square-wave signal, can reflect the forward and reverse displacement of jack piston rod, can directly access microcomputer and carry out data and process.
[0009] arrangement mode of the utility model mistor and the principle of work on piston rod are as shown in Figure 3.It is compared with eight magnetosensitive chips, and mistor is a half.We connect to form the detection trim circuit of Fig. 4 with electrical lead.Comparing with the eight magnetosensitive chip bridge circuits of Fig. 2, is the two-way electric bridge equally, and its output consists of the incremental encoding signal equally.Resistance in Fig. 4 circuit (31) (33) (34) (36) is the plain metal film resistance, and they have replaced four arms of original mistor, and its effect is to coordinate mistor to form the two-way electric bridge.Two potentiometers (32) (35) can be adjusted trim to the nonuniformity of mistor, it can also be in tracking (coordinating debugging in lifting jack that the mistor sensor is packed into), adopts " non-wide technology " (" non-wide technology " is mainly in order to improve the sensitivity of sensor) and the phase differential that produces is corrected.
[0010] Fig. 5 is the circuit block diagram of the utility model circuit board (7).(41) are 20 segmentation clipper circuits in Fig. 5, and it mainly carries out sensing and 20 segmentations to the incremental encoding signal that detects after amplifying.
[0011] displacement transducer that utilizes mistor to make, the matching degree of the detection range of the sensitivity of its precision and sensor, antijamming capability, probe, the size of mistor and groove dimensions, the factors such as segmentation number of sub-circuit are relevant.Due to the special construction of lifting jack and abominable environment for use, its precision can not be accomplished as magnetic railings ruler high.External eight magnetosensitive chip fitting piston bar 2mm period grooves adopt 20 sub-circuits can reach 0.1mm resolution and 0.1mm precision.
[0012] four magnetosensitive chip sensors of the present utility model, its sensitivity and eight magnetosensitive chips are than low one times, but it can adopt together with piston rod " non-wide technology " debugging, also can reach 0.1mm resolution and 0.1mm precision.On the whole, four magnetosensitive chip sensors of the present utility model are compared with eight magnetosensitive chips: advantage is the technical parameter requirement that has reduced mistor, and shortcoming is to have strengthened debugging difficulty.
Claims (2)
1. magneto-dependent sensor that is applied to lifting jack, include bottom, bottom and outer tube consist of the housing of sensing head, solidifying glue is packaged in mistor chip and magnetite in sensing head, lead-in wire is drawn the signal of sensing head and is connected on circuit board, and one of cable is connected on the accessible computer in other end on circuit board.
2. a kind of magneto-dependent sensor that is applied to lifting jack according to claim 1, it is characterized in that: the mistor chip is made of side by side four resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320032220 CN203024725U (en) | 2013-01-11 | 2013-01-11 | Magneto-dependent sensor applied to jacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320032220 CN203024725U (en) | 2013-01-11 | 2013-01-11 | Magneto-dependent sensor applied to jacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203024725U true CN203024725U (en) | 2013-06-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320032220 Expired - Fee Related CN203024725U (en) | 2013-01-11 | 2013-01-11 | Magneto-dependent sensor applied to jacks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203024725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090781A (en) * | 2013-01-11 | 2013-05-08 | 合肥高创传感器有限公司 | Magnetic-sensing sensor applied to lifting jack |
-
2013
- 2013-01-11 CN CN 201320032220 patent/CN203024725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090781A (en) * | 2013-01-11 | 2013-05-08 | 合肥高创传感器有限公司 | Magnetic-sensing sensor applied to lifting jack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20150111 |
|
| EXPY | Termination of patent right or utility model |