CN203083664U - Magnetic sensor - Google Patents
Magnetic sensor Download PDFInfo
- Publication number
- CN203083664U CN203083664U CN 201320048087 CN201320048087U CN203083664U CN 203083664 U CN203083664 U CN 203083664U CN 201320048087 CN201320048087 CN 201320048087 CN 201320048087 U CN201320048087 U CN 201320048087U CN 203083664 U CN203083664 U CN 203083664U
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- magneto
- tongue tube
- shell
- float
- sensor
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Abstract
The utility model discloses a magnetic sensor. The magnetic sensor comprises an outer shell, a magnetic sensing element and a floater, wherein the outer shell is arranged to be of a single end sealed type pipe shape, the magnetic sensing element is arranged inside the outer shell, the magnetic sensing element is externally connected with a wire, a rotating sliding sleeve used for fixing the wire is arranged at an opening end of the outer shell, the outer shell is filled with resin, the floater is provided with a permanent magnet, and the floater is matched with the magnetic sensing element to move. The magnetic sensor is high in stability, long in service life, high in reliability, and beneficial to production and popularization.
Description
Technical field
The utility model relates to a kind of sensor, in particular a kind of magneto-dependent sensor.
Background technology
Equipment in the daily life need be monitored water level, for example washing machine, air conditioner etc.Magnetosensitive water level monitor life-span of the prior art is short, and the immersion resistance to pressure is poor, and long period of soaking occurs sensitivity easily and reduces in water, even problem such as can't work; Existing magnetosensitive water level monitor complex structure, maintenance is inconvenient; Because problems such as this class magnetosensitive water level monitor lacks detection meanss such as on off test, Insulation test, immersion voltage-withstand test in manufacturing process, and existing magnetosensitive level switch ubiquity defective insulation, and break-make is bad.
Therefore, prior art has yet to be improved and developed.
The utility model content
The purpose of this utility model is to provide a kind of magneto-dependent sensor, is intended to solve existing magnetosensitive water level monitor complex structure, technical matterss such as immersion resistance to pressure and poor stability.
The technical solution of the utility model is as follows: a kind of magneto-dependent sensor, comprise shell, magneto sensor, float, wherein, described shell is arranged to single-ended closed tubulose, described magneto sensor places enclosure, the magneto sensor external cord, described magneto sensor and electric wire weld place enclosure, and described shell is filled by resin; Described float is provided with permanent magnet, described float and magneto sensor interoperation.
Described magneto-dependent sensor, wherein, described permanent magnet surfaces flux density is greater than 80mT, and permanent magnet thickness is less than 6mm, and the density of the integral body that described float and permanent magnet are formed is less than 0.7g/m
3
Described magneto-dependent sensor, wherein, described magneto sensor is a tongue tube.
Described magneto-dependent sensor, wherein, described magneto sensor is the MR magnetic resistance.
Described magneto-dependent sensor, wherein, described tongue tube vertically is provided with, the distance of the glass tube lower end of tongue tube and tongue tube lower end electric wire weld is not less than 4mm, the wire length of the glass tube of tongue tube upper end is not less than 8mm, keeps 1mm at least in the wire length of the weld tongue tube of tongue tube lower end electric wire.
Described magneto-dependent sensor, wherein, described tongue tube vertically is provided with, the glass tube upper end of tongue tube is not less than 4mm with the distance of tongue tube upper end electric wire weld, the wire length of the glass tube lower end of tongue tube is not less than 8mm, keeps 1mm at least in the wire length of the weld tongue tube of tongue tube lower end electric wire.
Described magneto-dependent sensor, wherein, described float is arranged to ring-type, permanent magnet is arranged on the float medial surface, and described shell passes float, and the shell upper end is provided with limited block, the magneto sensor in the shell and the permanent magnet interoperation of float medial surface, described shell lower end is provided with spacing ring.
Described magneto-dependent sensor, wherein, described float is arranged on the shell outside, and described permanent magnet is arranged on float near on the side of shell, the magneto sensor interoperation in described permanent magnet and the shell.
The beneficial effects of the utility model: the utility model is filled shell by utilizing resin, helps the magneto sensor in stable and the protecting sheathing, avoids magneto sensor to contact water with electric wire, improves the stability of magneto-dependent sensor, prolongs its serviceable life; The utility model cooperates with magneto sensor greater than 80mT and the thickness permanent magnet less than 6mm by surperficial flux density is set, and helps increasing the sensitivity of magneto-dependent sensor; The utility model helps improving the stability of magneto-dependent sensor by the position of magneto sensor in shell and the welding position of magneto sensor and electric wire rationally are set, and avoids resin to influence the reliability that magneto sensor is connected with electric wire; The utility model guarantees the reliability of magneto-dependent sensor finished product by in the process of making magneto-dependent sensor detection methods such as on off test, Insulation test, immersion voltage-withstand test being set.
Description of drawings
Fig. 1 be in the utility model in the magneto-dependent sensor float be enclosed within structural representation on the shell.
Fig. 2 is an internal view of establishing tongue tube in the utility model in the magneto-dependent sensor in the shell.
Fig. 3 is an internal view of establishing the MR magnetic resistance in the utility model in the magneto-dependent sensor in the shell.
Fig. 4 be in the utility model in the magneto-dependent sensor float be arranged on the structural representation in the shell outside.
Fig. 5 is an internal view of establishing tongue tube in the utility model in the magneto-dependent sensor in the shell.
Fig. 6 is an internal view of establishing the MR magnetic resistance in the utility model in the magneto-dependent sensor in the shell.
Fig. 7 a is the structural representation of tongue tube welding electric wire in the magneto-dependent sensor in the utility model.
Fig. 7 b is the structural representation of tongue tube welding electric wire in the magneto-dependent sensor in the utility model.
Fig. 8 is the manufacturing process flow diagram of magneto-dependent sensor in the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, clear and definite, below the utility model is further described with reference to the accompanying drawing embodiment that develops simultaneously.
As shown in Figure 1 and Figure 4, magneto-dependent sensor described in the utility model comprises shell 100, magneto sensor (not drawing among the figure), float 300, it is characterized in that, described shell 100 is arranged to single-ended closed tubulose, described magneto sensor places shell 100 inside, magneto sensor external cord 800, described shell 100 is filled by resin; Described float 300 is provided with permanent magnet 400, permanent magnet 400 in the described float 300 and the magneto sensor interoperation in the shell 100.
Embodiment 1
As shown in Figure 2, in the present embodiment, magneto sensor is set at tongue tube 210.
Described magneto-dependent sensor comprises shell 100, tongue tube 210, float 300, permanent magnet 400, spacing ring 500, limited block 600, rotation sliding sleeve 700; Shell 100 is arranged to single-ended closed tubulose, and tongue tube 210 is vertically put into shell 100 after welding with electric wire 800; In the present embodiment, described float 300 is arranged to ring-type, and permanent magnet 400 is arranged on float 300 medial surfaces, and is concrete, and permanent magnet 400 is arranged to circular, permanent magnet 400 and float 300 concentrics; Described shell 100 passes float 300, break away from shell 100 for fear of float in real work 300, shell 100 upper ends are provided with the distance that limited block 600 moves upward with restriction float 300, the tongue tube 210 in the shell 100 and permanent magnet 400 interoperations of float 300 medial surfaces: float 300 slides on shell 100, thereby driving permanent magnet 400 slides on shell 100 surfaces, when permanent magnet 400 passes through the position at tongue tube 210 places in the shells 100, tongue tube 210 is subjected to the influence of magnetic field of permanent magnet 400, tongue tube 210 closures; During the position at tongue tube 210 places in permanent magnet 400 slides off shell 100, tongue tube 210 is not subjected to the influence of magnetic field of permanent magnet 400, and tongue tube 210 disconnects.
In order to increase the sensitivity of magneto-dependent sensor described in the utility model, described permanent magnet 400 is made by disposable the magnetizing in Ferrite Material two sides, and described permanent magnet 400 surperficial flux density are greater than 80mT, and permanent magnet 400 thickness are less than 6mm.
In the present embodiment, described tongue tube 210 welds shown in Fig. 7 a with electric wire 800, tongue tube 210 places the top of shell 100 inside, h1 represents the glass tube top of tongue tube 210 and the distance between tongue tube 210 upper ends and electric wire 800 welds among Fig. 7 a, h2 represents the wire length of tongue tube 210 lower ends, and h3 represents the distance between the least significant end of the weld of tongue tube 210 bottoms and electric wire 800 and tongue tube 210 lower ends lead-in wire.Magneto-dependent sensor described in the utility model needs to utilize resin to fill shell 100 in manufacturing process; reach the effect of protection and stable tongue tube 210; in order not allow resin influence being connected of tongue tube 210 and lead 800; h1 is greater than 4mm aborning; h2 is not less than 8mm; h3 specifically can be provided with the size of h1, h2, h3 according to actual needs greater than 1mm.
Further, in order to limit the distance that float 300 moves downward, described shell 100 lower ends are provided with spacing ring 500, and shell 100 lower ends are provided with groove, and spacing ring 500 is stuck in the groove fixing.
Further,, increase the stability of magneto-dependent sensor described in the utility model, rotation sliding sleeve 700 is set at shell 100 openends for securing electric lines.In actual the use, take all factors into consideration the problem of cost and applicability, select whether to adopt described rotation sliding sleeve 700.Adopt rotation sliding sleeve 700 in the present embodiment.
When magneto-dependent sensor described in the utility model is worked, electric wire 800 connects control circuit, magneto-dependent sensor is vertically placed, the magneto-dependent sensor lower end is immersed in the liquid, set the position of magneto-dependent sensor, after leaving standstill, float 300 be in spacing ring 500 above, be close to spacing ring 500, because tongue tube 210 places the top of shell 100 inside, tongue tube 210 is not subjected to the influence of permanent magnet 400, and tongue tube 210 is in off-state, float 300 is subjected to buoyancy of liquid, and float 300 floats on the liquid level and with liquid level rising or decline and rises or descend; When liquid level rose, float 300 rose with liquid level, placed the permanent magnet 400 in the float 300 to rise, when permanent magnet 400 rises to the position of tongue tube 210, tongue tube 210 is subjected to the influence in the magnetic field of permanent magnet 400, tongue tube 210 closures, the control circuit conducting that electric wire 800 connects.
Rise or descend for float 300 can be risen or descend with liquid level, the assembly density of float 300 and permanent magnet 400 is less than 0.7g/m
3
Embodiment 2
Present embodiment is except different described in the welding position of tongue tube 210 and electric wire 800 and the embodiment 1, and other structures are all with identical described in the embodiment 1.
In the present embodiment, the connected mode of tongue tube 210 and electric wire 800 is shown in Fig. 7 b, h4 represents the length of tongue tube 210 upper ends lead-in wire among Fig. 7 b, h5 represents the glass tube bottom of tongue tube 210 and the distance between tongue tube 210 bottoms and electric wire 800 welds, and h6 represents the distance between the least significant end of tongue tube 210 bottoms and electric wire 800 welds and tongue tube 210 lower ends lead-in wire.Magneto-dependent sensor described in the utility model needs to utilize resin to fill shell 100 in manufacturing process; reach the effect of protection and stable tongue tube 210; in order not allow resin influence being connected of tongue tube 210 and lead 800; h4 is not less than 8mm aborning; h5 is greater than 4mm; h6 specifically can be provided with the size of h4, h5, h6 according to actual needs greater than 1mm.Tongue tube 210 is arranged on the lower end of shell 100 inside in the present embodiment, and the magneto-dependent sensor described in the present embodiment is when leaving standstill, and tongue tube 210 is in connection status, and the control circuit that electric wire 800 connects needs to be provided with according to actual needs.
Embodiment 3
As shown in Figure 3, the magneto sensor in the present embodiment is MR(Magneto Resistance) magnetic resistance 220, other structures are all with identical described in the embodiment 1.
Embodiment 4
As shown in Figure 5, in the present embodiment, magneto sensor is set at tongue tube 210.
Described magneto-dependent sensor comprises shell 100, tongue tube 210, float 300, permanent magnet 400, limited block 600, rotation sliding sleeve 700; Shell 100 is arranged to single-ended closed tubulose, and tongue tube 210 is vertically put into shell 100 after welding with electric wire 800; In the present embodiment, described float 300 is arranged on the outside of shell 100, and float 300 is set to hollow rectangular-shaped, can be arranged to hollow polyhedral shape or hollow ball-shape to float 300 as required during actual the use; Permanent magnet 400 places float 300 inside, specifically is arranged on the float 300 inner outsides near shell 100, is arranged on permanent magnet 400 and tongue tube 210 cooperatings that are arranged in the shell 100 in the float 300.
In the present embodiment, tongue tube 210 can be arranged to shown in Fig. 7 a with the welding position of lead 800, h1 is greater than 4mm, h2 is not less than 8mm, wherein h1, the h2 in the present embodiment and h3 are identical with the h3 notion with h1, h2 among the embodiment 1 greater than 1mm(for h3), perhaps be arranged to shown in Fig. 7 b, h4 is not less than 8mm, h5 is greater than 4mm, wherein h4, the h5 in the present embodiment and h6 are identical with the h6 notion with h4, h5 among the embodiment 2 greater than 1mm(for h6), the size of h4, h5, h6 specifically can be set according to actual needs.In the present embodiment, tongue tube 210 is arranged to shown in Fig. 7 a with the welding position of lead 800, and h1 is greater than 4mm, and h2 is not less than 8mm, and h3 is greater than 1mm.
In order to increase the sensitivity of magneto-dependent sensor described in the utility model, described permanent magnet 400 is made by disposable the magnetizing in Ferrite Material two sides, and described permanent magnet 400 surperficial flux density are greater than 80mT, and permanent magnet 400 thickness are less than 6mm.
Further,, increase the stability of magneto-dependent sensor described in the utility model, rotation sliding sleeve 700 is set at shell 100 openends for securing electric lines.
When the magneto-dependent sensor described in the present embodiment was worked, electric wire 800 connected control circuits, and magneto-dependent sensor is vertically placed, and the magneto-dependent sensor lower end is immersed in the liquid, sets the position of magneto-dependent sensor, and float 300 floats on the liquid level, places shell 100 outsides; Concrete, a spacing conduction trough that is used to limit float 300 can be set in liquid container, spacing conduction trough shape and float 300 couplings, liquid level and monitored liquid level are with high in the spacing conduction trough, and shell 100 is close to spacing conduction trough surface and is placed; After leaving standstill, float 300 is still on the liquid level, tongue tube 210 positions are higher than the position of float 300, tongue tube 210 is not subjected to the influence of permanent magnet 400, tongue tube 210 is in off-state, float 300 is subjected to buoyancy of liquid, and float 300 floats on the liquid level and with liquid level rising or decline and rises or descend; When monitored liquid level rises, liquid level in the spacing conduction trough rises, float 300 rises with the liquid level in the spacing conduction trough, place the permanent magnet 400 in the float 300 to rise, when permanent magnet 400 rises to the position of tongue tube 210, tongue tube 210 is subjected to the influence in the magnetic field of permanent magnet 400, tongue tube 210 closures, the control circuit conducting that electric wire 800 connects.
Embodiment 5
As shown in Figure 6, the magneto sensor in the present embodiment is a MR magnetic resistance 220, and other structures are all with identical described in the embodiment 4.
The manufacturing process flow of magneto-dependent sensor described in the utility model may further comprise the steps as shown in Figure 8:
A. make float 300: utilize the polypropylene material foaming to make float 300, permanent magnet 400 is embedded in the float;
B. make shell 100;
C., magneto sensor is set: welding electric wire and magneto sensor, in shell, add resin, the height that adds resin is less than 1/2 outer cover height, before hardening of resin, vertically put in the shell magneto sensor, the weld of magneto sensor lower end and electric wire immerses in the resin fixing, the weld of magneto sensor and electric wire places enclosure, utilize resin complete filling enclosure, and add resin-blocked shell aperture end and securing electric lines in the junction of shell aperture end and electric wire, assembling float and shell obtain magneto-dependent sensor;
D. described magneto-dependent sensor is carried out on off test;
E. to the described magneto-dependent sensor voltage-withstand test that soaks.
For sensitivity and its stability of assurance that increases magneto-dependent sensor described in the utility model, permanent magnet 400 in the described steps A is made by disposable the magnetizing in Ferrite Material two sides, described permanent magnet 400 surperficial flux density are greater than 80mT, permanent magnet 400 thickness are less than 6mm, and the density of the integral body that described float 300 and permanent magnet 400 are formed is less than 0.7g/m
3
Among the described step C, when magneto sensor is tongue tube 210, distance between the minimum point of the weld of tongue tube 210 lower ends and electric wire and tongue tube 210 lower ends lead-in wire is not less than 1mm, this welding manner can guarantee that tongue tube 210 is stably fixed at shell 100 inside on the one hand, can guarantee that on the other hand the magneto-dependent sensor finished product is not easy to cause the weld of tongue tube 210 lower ends lead-in wire and electric wire 800 loosening when collision, help improving the security and the reliability of magneto-dependent sensor described in the utility model, meet electric requirement.
Among the described step C, vertically put into magneto sensor after, utilize the openends of resin and complete closed shell 100 fixing electric wire 800, the junction at the openend and the electric wire 800 of shell 100 is coated with insulativity and water tolerance that the last layer resin is guaranteed magneto-dependent sensor again.
Described step e may further comprise the steps:
E1: two water tanks of filling water are set, with every group of one or more magneto-dependent sensor is that unit tests, once test one group, described magneto-dependent sensor one end is immersed in the water tank, make permanent magnet contact water, the other end of magneto-dependent sensor wire connecting immerses in another water tank, and soak time was at least 10 minutes;
E2: open the tester power switch, leakage current is set to 5mA, and voltage is set to 2000V, and the time is set to 3S, utilizes the Testing gun contact to be soaked with the water of the other end of electric wire 800;
E3: observe electric leakage pilot lamp and alarm, the electric leakage pilot lamp does not work and alarm is not worked proves that detected magneto-dependent sensor immersion voltage-withstand test is qualified.
During actual production, the staff also detects the insulativity of magneto-dependent sensor described in the utility model by the insulation resistance instrument.
Magneto-dependent sensor described in the utility model can be used for the monitoring of water level monitoring or oil level, and concrete magneto-dependent sensor described in the utility model can be used for the washing machine water level monitoring, and cooling water car cylinder water level monitoring, air cooler are with water level monitoring etc.
The utility model is filled shell 100 by utilizing resin, helps the magneto sensor in stable and the protecting sheathing 100, avoids magneto sensor to contact water with electric wire 800, improves the stability of magneto-dependent sensor, prolongs its serviceable life; The utility model cooperates with magneto sensor greater than 80mT and the thickness permanent magnet 400 less than 6mm by surperficial flux density is set, and helps increasing the sensitivity of magneto-dependent sensor; The utility model helps improving the stability of magneto-dependent sensor by the position of magneto sensor in shell 100 and the welding position of magneto sensor and electric wire 800 rationally are set, and avoids resin to influence the connection reliability of magneto sensor and electric wire 800; The utility model guarantees the reliability of magneto-dependent sensor finished product by in the process of making magneto-dependent sensor detection methods such as on off test, Insulation test, immersion voltage-withstand test being set.
Should be understood that; application of the present utility model is not limited to above-mentioned giving an example; for those of ordinary skills, can be improved according to the above description or conversion, all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (8)
1. magneto-dependent sensor, comprise shell, magneto sensor, float, it is characterized in that, described shell is arranged to single-ended closed tubulose, described magneto sensor places enclosure, the magneto sensor external cord, described magneto sensor and electric wire weld place enclosure, and described shell is filled by resin; Described float is provided with permanent magnet, described float and magneto sensor interoperation.
2. magneto-dependent sensor according to claim 1 is characterized in that, described permanent magnet surfaces flux density is greater than 80mT, and permanent magnet thickness is less than 6mm, and the density of the integral body that described float and permanent magnet are formed is less than 0.7g/m
3
3. magneto-dependent sensor according to claim 2 is characterized in that, described magneto sensor is a tongue tube.
4. magneto-dependent sensor according to claim 2 is characterized in that, described magneto sensor is the MR magnetic resistance.
5. magneto-dependent sensor according to claim 3, it is characterized in that, described tongue tube vertically is provided with, the distance of the glass tube lower end of tongue tube and tongue tube lower end electric wire weld is not less than 4mm, the wire length of the glass tube of tongue tube upper end is not less than 8mm, keeps 1mm at least in the wire length of the weld tongue tube of tongue tube lower end electric wire.
6. magneto-dependent sensor according to claim 3, it is characterized in that, described tongue tube vertically is provided with, the glass tube upper end of tongue tube is not less than 4mm with the distance of tongue tube upper end electric wire weld, the wire length of the glass tube lower end of tongue tube is not less than 8mm, keeps 1mm at least in the wire length of the weld tongue tube of tongue tube lower end electric wire.
7. according to any described magneto-dependent sensor of claim 4-6, it is characterized in that, described float is arranged to ring-type, permanent magnet is arranged on the float medial surface, described shell passes float, the shell upper end is provided with limited block, the magneto sensor in the shell and the permanent magnet interoperation of float medial surface, and described shell lower end is provided with spacing ring.
8. according to any described magneto-dependent sensor of claim 4-6, it is characterized in that described float is arranged on the shell outside, described permanent magnet is arranged on float near on the side of shell, the magneto sensor interoperation in described permanent magnet and the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048087 CN203083664U (en) | 2013-01-29 | 2013-01-29 | Magnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048087 CN203083664U (en) | 2013-01-29 | 2013-01-29 | Magnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203083664U true CN203083664U (en) | 2013-07-24 |
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ID=48829490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320048087 Expired - Fee Related CN203083664U (en) | 2013-01-29 | 2013-01-29 | Magnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203083664U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105216A (en) * | 2013-01-29 | 2013-05-15 | 佛山市川东磁电股份有限公司 | Magnetic sensor and manufacturing process thereof |
| CN104614050A (en) * | 2015-01-25 | 2015-05-13 | 渭南师范学院 | Magneto-dependent sensor and manufacturing technology thereof |
| CN105675092A (en) * | 2016-03-04 | 2016-06-15 | 温州瓯云科技有限公司 | Miniature high-precision liquid level sensor |
-
2013
- 2013-01-29 CN CN 201320048087 patent/CN203083664U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105216A (en) * | 2013-01-29 | 2013-05-15 | 佛山市川东磁电股份有限公司 | Magnetic sensor and manufacturing process thereof |
| CN103105216B (en) * | 2013-01-29 | 2015-12-02 | 佛山市川东磁电股份有限公司 | A kind of magneto-dependent sensor and manufacturing process thereof |
| CN104614050A (en) * | 2015-01-25 | 2015-05-13 | 渭南师范学院 | Magneto-dependent sensor and manufacturing technology thereof |
| CN105675092A (en) * | 2016-03-04 | 2016-06-15 | 温州瓯云科技有限公司 | Miniature high-precision liquid level sensor |
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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: 20130724 Termination date: 20180129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |