CN205246899U - Anti temperature interference type inductive transducer - Google Patents
Anti temperature interference type inductive transducer Download PDFInfo
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- CN205246899U CN205246899U CN201521109283.XU CN201521109283U CN205246899U CN 205246899 U CN205246899 U CN 205246899U CN 201521109283 U CN201521109283 U CN 201521109283U CN 205246899 U CN205246899 U CN 205246899U
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- temperature interference
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Abstract
The utility model discloses an anti temperature interference type inductive transducer, its characterized in that includes: metal casing, setting are in the internal magnetic tank of metal -back and with coil that magnetic tank links to each other, with the circuit board that the coil links to each other, be provided with a plurality of electric capacity on the circuit board, electric capacity, magnetic tank and loop formation LC oscillation circuit, LC oscillation circuit's frequency range is 1 hertz to the 20K hertz, the metal casing is semi -closed structure, electric capacity, magnetic tank lie in the blind end of metal casing. After being close to this alternating magnetic field with high magnetic permeability metals such as iron, produce the great vortex, make magnetic field sharply attenuate, therefore the vibration amplitude reduce, stop even to shake, subsequent detecting circuit can detect this and changes on the circuit board, drives subsequent output tube and exports. Full metal package inductive transducer has just so been realized.
Description
Technical field
The utility model relates to a kind of inductance sensor, relates in particular to a kind of resisting temperature interference type inductance sensor.
Background technology
Inductance sensor can detect the existence of the metal target thing in certain distance, is widely used in Aero-Space, submarine warship, industrial automatic control field, and the industry spot such as elevator, automobile making, engineering machinery. The frequency of oscillation of conventional inductance sensor is generally 100K between 800K hertz, and the alternating magnetic field frequency of the waveform generation of this frequency is also higher, thereby the swirl ratio producing in metal is larger, and magnetic field can not penetrating metal shell. Because high frequency magnetic field attenuation ratio in full metal jacket that sensor oscillation produces is more severe, magnetic field energy is not enough to penetrate full metal jacket, and therefore approach switch mostly is non-full metal jacket and cap. This structural limitations the application of approach switch product, when product is used in the occasion of high pressure, high vibrations, the shell of sensor or cap can damage because of pressure or mechanical shock; In addition, obvious to electromagnetic interference with the sensor of cap, do not reach antimagnetic anti-welding effect. This kind of sensor has very large application limitation, can not be applied in high pressure occasion, can not be applied in the occasion of high vibrations, strong mechanical shock, high-temperature impact and highfield. Therefore the working environment that, traditional inductance sensor can not be applied in the above deep water of high-voltage oil cylinder, 100 meters, welding occasion and periphery have high-intensity magnetic field to disturb.
The occasion that multiple metal sensor stacks are used in addition, in the time there is the coil in two or more magnetic fields of pointing to toward each other, the position of the magnetic field sensor that is superimposed upon metal sensor in the magnetic field of pointing to toward each other almost disappears, make the magnetic field sensor of metal sensor in the time there is no magnetizable objects, detect zero signal, thereby obtain favourable signal to noise ratio and high dynamic. Zero signal depends on environment temperature, but in the time there is magnetizable objects, and the measuring-signal of magnetic field sensor will depart from zero signal and general temperature influence not.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of resisting temperature interference type inductance sensor, has the feature using under multiple bad working environments that is suitable for.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of resisting temperature interference type inductance sensor, the circuit board that comprises metal shell, is arranged on magnetic tank in described metal shell and the coil being connected with described magnetic tank, is connected with described coil, on described circuit board, be provided with some electric capacity, described electric capacity, magnetic tank and coil form LC oscillating circuit, the frequency range of described LC oscillating circuit be 1 hertz to 20K hertz, described metal shell is semi-closed structure, described electric capacity, magnetic tank is positioned at the blind end of metal shell, its innovative point is: on described metal shell, be provided with and be positioned at the bucking coil that metal shell is outside and be communicated with or disconnected by switch with described coil, the two ends of bucking coil are respectively the first link and the second link, described the first link is directly connected with one end of coil, described switch is arranged between described the second link and the other end of coil, the first duty of this switch is the two ends that connect this coil, the second duty of this switch is the described bucking coil of serial connection that is connected with described the second link, described bucking coil is wrapped in metal film layer inside.
Preferably, described metal film layer inside is provided with the interpole coil of connecting or disconnecting with described building-out capacitor.
Preferably, between described metal film layer and described bucking coil and interpole coil, be provided with heat-absorbing medium layer.
Preferably, on described heat-absorbing medium layer, be provided with the air-vent being in communication with the outside for dispelling the heat.
Preferably, described circuit board is arranged in described housing, and described circuit board is connected with the connecting line that is arranged in described housing.
Preferably, between described circuit board and described metal shell, be provided with packed layer.
Preferably, on described metal shell, blind end is cylindrical structure.
Preferably, on the blind end of described metal shell, be provided with the external screw thread being connected with miscellaneous part.
Preferably, on described metal shell, be openend away from one end of blind end, described openend is six prism structures.
Preferably, described metal shell is low permeability metal, and described low permeability metal is the one of stainless steel, titanium alloy, full copper, full aluminium kind.
The utility model has the advantage of: the present invention adopts the metal shell of low permeability, and the frequency of oscillation of LC oscillating circuit is set to 1 hertz to 20K hertz, form the design of low frequency metal package, the alternating magnetic field that 1 hertz of square wave to this frequency range of 20K hertz or sine-wave oscillation produce can penetrate to low-loss the low permeability metals such as stainless steel, titanium alloy, full aluminium or full copper. When with the high magnetic permeability metals such as iron near this alternating magnetic field after, produce compared with maelstrom, make magnetic field sharp-decay, thus oscillation amplitude lower, even stop shake, on circuit board follow-up detecting circuit can detect this change, drive follow-up efferent duct to export. So just realize metal package inductance sensor.
In this metal sensor, can measure the size in the magnetic field only producing by coil or the magnetic field size of coil and bucking coil stack generation by means of magnetic field sensor in an advantageous manner, because bucking coil is arranged in metal film layer, can reduce the degree of dependence of metal sensor to temperature by existing of bucking coil with favourable thus.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
Fig. 1 is the structural representation of a kind of resisting temperature interference type of the utility model inductance sensor.
In figure: 1-magnetic tank, 2-coil, 3-circuit board, 4-connecting line, 5-metal shell, 6-packed layer, 7-electric capacity, 8-blind end, 9-openend, 10-switch, 11-bucking coil, 12-the first link, 13-the second link, 14-metal film layer, 15-interpole coil, 16-heat-absorbing medium layer, 17-air-vent.
Detailed description of the invention
The circuit board 3 that resisting temperature interference type inductance sensor of the present utility model comprises metal shell 5, be arranged on magnetic tank 1 in metal shell 5 and the coil 2 being connected with magnetic tank 1, be connected with coil 2, on circuit board 3, be provided with some electric capacity 7, electric capacity 7, magnetic tank 1 and coil 2 form LC oscillating circuit, the frequency range of LC oscillating circuit be 1 hertz to 20K hertz; Metal shell 5 is semi-closed structure, and electric capacity 7, magnetic tank 1 are positioned at the blind end 8 of metal shell 5. By greatly increasing the capacitance of electric capacity 7 on circuit board 3 and the sense value of coil 2, make the frequency of oscillation of LC oscillating circuit low as much as possible. On metal shell 5, be provided with and be positioned at the bucking coil 11 that metal shell 5 is outside and be communicated with or disconnected by switch 10 with coil 2, the two ends of bucking coil 11 are respectively the first link 12 and the second link 13, the first link 12 is directly connected with one end of coil, switch 10 is arranged between the second link 13 and the other end of coil, the first duty of this switch 10 is the two ends that connect this coil, and the second duty of this switch 10 is the serial connection bucking coils 11 that are connected with the second link 13; Bucking coil 11 is wrapped in metal film layer 14 inside. The present invention adopts the metal shell of low permeability, and the frequency of oscillation of LC oscillating circuit is set to 1 hertz to 20K hertz, form the design of low frequency metal package, the alternating magnetic field that 1 hertz of square wave to this frequency range of 20K hertz or sine-wave oscillation produce can penetrate to low-loss the low permeability metals such as stainless steel, titanium alloy, full aluminium or full copper. When with the high magnetic permeability metals such as iron near this alternating magnetic field after, produce compared with maelstrom, make magnetic field sharp-decay, thus oscillation amplitude lower, even stop shake, on circuit board 3 follow-up detecting circuit can detect this change, drive follow-up efferent duct to export. So just realize metal package inductance sensor. In this metal sensor, can measure the size in the magnetic field only producing by coil or the magnetic field size of coil and bucking coil 11 stack generations by means of magnetic field sensor in an advantageous manner, because bucking coil 11 is arranged in metal film layer 14, can reduce the degree of dependence of metal sensor to temperature by existing of bucking coil 11 with favourable thus.
The size that strengthens magnetic field in order to strengthen magnetic flux strengthens antijamming capability, above-mentioned metal film layer 14 inside are provided with the interpole coil 15 of connecting with building-out capacitor or disconnecting, for the temperature conduction in time bucking coil 11 and interpole coil 15 being produced is gone out, between metal film layer 14 and bucking coil 11 and interpole coil 15, be provided with heat-absorbing medium layer 16, on heat-absorbing medium layer 16, be provided with the air-vent 17 being in communication with the outside for dispelling the heat.
Above-mentioned circuit board 3 is arranged in housing, and circuit board 3 is connected with the connecting line 4 that is arranged in housing. In order to play the components and parts in fixing and protecting sheathing, between circuit board 3 and metal shell 5, be provided with packed layer 6. For the ease of being connected with miscellaneous part, on metal shell 5 of the present invention, blind end 8 is cylindrical structure, on the blind end 8 of metal shell 5, is provided with the external screw thread being connected with miscellaneous part. For the ease of threaded together, on metal shell 5, be openend 9 away from one end of blind end 8, openend 9 is six prism structures. In order to improve result of use, metal shell is low permeability metal, and low permeability metal is the one of stainless steel, titanium alloy, full copper, full aluminium kind.
Finally it should be noted that, above embodiment is the non-limiting technical scheme in order to the technical solution of the utility model to be described only, those of ordinary skill in the art is to be understood that, those are modified to the technical solution of the utility model or are equal to replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present utility model.
Claims (10)
1. a resisting temperature interference type inductance sensor, the circuit board that comprises metal shell, is arranged on magnetic tank in described metal shell and the coil being connected with described magnetic tank, is connected with described coil, on described circuit board, be provided with some electric capacity, described electric capacity, magnetic tank and coil form LC oscillating circuit, the frequency range of described LC oscillating circuit be 1 hertz to 20K hertz, described metal shell is semi-closed structure, described electric capacity, magnetic tank is positioned at the blind end of metal shell, it is characterized in that: on described metal shell, be provided with and be positioned at the bucking coil that metal shell is outside and be communicated with or disconnected by switch with described coil, the two ends of bucking coil are respectively the first link and the second link, described the first link is directly connected with one end of coil, described switch is arranged between described the second link and the other end of coil, the first duty of this switch is the two ends that connect this coil, the second duty of this switch is the described bucking coil of serial connection that is connected with described the second link, described bucking coil is wrapped in metal film layer inside.
2. a kind of resisting temperature interference type inductance sensor as claimed in claim 1, is characterized in that: described metal film layer inside is provided with the interpole coil of connecting or disconnecting with described building-out capacitor.
3. a kind of resisting temperature interference type inductance sensor as claimed in claim 2, is characterized in that: between described metal film layer and described bucking coil and interpole coil, be provided with heat-absorbing medium layer.
4. a kind of resisting temperature interference type inductance sensor as claimed in claim 3, is characterized in that: on described heat-absorbing medium layer, be provided with the air-vent being in communication with the outside for dispelling the heat.
5. a kind of resisting temperature interference type inductance sensor as claimed in claim 1, is characterized in that: described circuit board is arranged in described housing, and described circuit board is connected with the connecting line that is arranged in described housing.
6. a kind of resisting temperature interference type inductance sensor as claimed in claim 5, is characterized in that: between described circuit board and described metal shell, be provided with packed layer.
7. a kind of resisting temperature interference type inductance sensor as claimed in claim 1, is characterized in that: on described metal shell, blind end is cylindrical structure.
8. a kind of resisting temperature interference type inductance sensor as claimed in claim 7, is characterized in that: on the blind end of described metal shell, be provided with the external screw thread being connected with miscellaneous part.
9. a kind of resisting temperature interference type inductance sensor as claimed in claim 1, is characterized in that: on described metal shell, be openend away from one end of blind end, described openend is six prism structures.
10. a kind of resisting temperature interference type inductance sensor as claimed in claim 1, is characterized in that: described metal shell is low permeability metal, and described low permeability metal is the one of stainless steel, titanium alloy, full copper, full aluminium kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521109283.XU CN205246899U (en) | 2015-12-29 | 2015-12-29 | Anti temperature interference type inductive transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521109283.XU CN205246899U (en) | 2015-12-29 | 2015-12-29 | Anti temperature interference type inductive transducer |
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| Publication Number | Publication Date |
|---|---|
| CN205246899U true CN205246899U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521109283.XU Active CN205246899U (en) | 2015-12-29 | 2015-12-29 | Anti temperature interference type inductive transducer |
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| CN (1) | CN205246899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867748A (en) * | 2018-03-28 | 2020-10-30 | 住友重机械工业株式会社 | Molding device |
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2015
- 2015-12-29 CN CN201521109283.XU patent/CN205246899U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111867748A (en) * | 2018-03-28 | 2020-10-30 | 住友重机械工业株式会社 | Molding device |
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