CN209992042U - Swing arm type liquid level sensor based on magnetic resistance non-contact - Google Patents
Swing arm type liquid level sensor based on magnetic resistance non-contact Download PDFInfo
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- CN209992042U CN209992042U CN201920738359.7U CN201920738359U CN209992042U CN 209992042 U CN209992042 U CN 209992042U CN 201920738359 U CN201920738359 U CN 201920738359U CN 209992042 U CN209992042 U CN 209992042U
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- magnetic resistance
- level sensor
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Abstract
The utility model discloses a swing arm type level sensor based on magnetic resistance non-contact, including casing, swing arm pointer, swing arm, float, circuit board and double-wiring bundle, the welding has the magnetic resistance component sequence on the circuit board, the magnetic resistance component sequence is fan-shaped arranging, and the both ends of magnetic resistance component sequence are connected with the double-wiring bundle respectively, and when the swing arm rotates, magnet on the swing arm pointer swings along magnetic resistance component sequence top. The utility model has the advantages that the magnetic resistance element sequence is adopted to replace the traditional reed switch scheme, the magnetic resistance effect is utilized, the induction sensitivity is effectively improved, the magnetic resistance switch is simple in production and low in cost relative to the reed switch, the structural strength is superior to the glass body structure of the reed switch, and the service life is long; in addition, the stability and reliability of the whole structure of the sensor are improved.
Description
Technical Field
The utility model relates to a level sensor technical field, concretely relates to swing arm type level sensor based on magnetic resistance non-contact.
Background
Traditional liquid level sensors all adopt linear structures, and floats of the traditional liquid level sensors move on a linear track along with the height change of liquid levels, so that different liquid level value signals are generated. At present, a swing arm type liquid level sensor is also available in the market, for example, a swing rod type liquid level sensor is introduced in patent publication No. CN203688040U, in which a float swings along with liquid level change, and the liquid level information is output by mutual induction and cooperation of a magnet on a swing arm and an information sensing module. However, the sensor has certain defects, firstly, the scheme that the reed switch is matched with a resistor device is adopted, and the long-term use process finds that the reed switch has many problems in the production, welding, transportation and use processes: such as manual welding, the efficiency is low; the reed switch is fragile, so that various protections are required in the transportation and use processes; as a mechanical switch, the problem of strain can occur after long-time operation, and the switching frequency is limited. In addition, the structural stability of the sensor is generally such that errors are likely to occur during the oscillation sensing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a swing arm type level sensor based on magnetic resistance non-contact, it has solved the defect that traditional swing arm formula level sensor exists to a little modified place has been proposed.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the utility model provides an arm swing type level sensor based on magnetic resistance non-contact, includes casing, swing arm pointer, swing arm, float, circuit board and double-wiring harness, the activity of swing arm pointer is established in the casing, and is equipped with magnet on the swing arm pointer, the swing arm is connected with the swing arm pointer, the float is established at the end of swing arm, the circuit board is fixed in the casing, the plug connector is established to the one end of double-wiring harness, and the other end extends in the casing, the welding has the magnetic resistance component sequence on the circuit board, the magnetic resistance component sequence is fan-shaped arranging, and the both ends of magnetic resistance component sequence are connected with the double-wiring harness respectively, and when the swing arm rotates, magnet on the.
The further improvement is that the pins of each magnetoresistive element in the magnetoresistive element sequence are connected in series in sequence, and each magnetoresistive element is alternately arranged on an inner arc line and an outer arc line.
The swing arm type liquid level sensor is further improved in that the swing arm type liquid level sensor further comprises a wire passing plug, a gland, a bottom plate and a stainless steel connecting pipe, wherein the wire passing plug is fixed on the outer side surface of the bottom plate through the gland;
the double wire harnesses sequentially penetrate through the wire passing plug, the bottom plate and the stainless steel connecting pipe and then extend into the shell.
The further improvement is that the inner side surface of the bottom plate is provided with a sealing gasket.
The further improvement lies in that swing arm type level sensor still includes the pencil protection tube, the pencil protection tube cover is on plug connector and the double-line pencil between the line stopper.
The beneficial effects of the utility model reside in that: the magnetic resistance element sequence is adopted to replace the traditional reed switch scheme, the magnetic resistance effect is utilized, the induction sensitivity is effectively improved, the magnetic resistance switch is simple to produce and low in cost relative to the reed switch, the structural strength is superior to that of a glass body structure of the reed switch, and the service life is long; in addition, the stability and reliability of the whole structure of the sensor are improved.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic diagram of the arrangement of a sequence of magnetoresistive elements;
FIG. 3 is a schematic view of the overall structure of the present invention;
in the figure: 1. a housing; 2. a swing arm pointer; 3. swinging arms; 4. a float; 5. a circuit board; 6. a double wire harness; 7. a magnet; 8. a plug-in unit; 9. a sequence of magnetoresistive elements; 10. a wire passing plug; 11. a gland; 12. a base plate; 13. a stainless steel connecting pipe; 14. a gasket; 15. a wire harness protection pipe.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Referring to fig. 1 to 3, a swing arm type level sensor based on magnetic resistance non-contact, including casing 1, swing arm pointer 2, swing arm 3, float 4, circuit board 5 and double wiring harness 6, swing arm pointer 2 activity is established in casing 1, and be equipped with magnet 7 on the swing arm pointer 2, swing arm 3 is connected with swing arm pointer 2, float 4 establishes the end at swing arm 3, circuit board 5 is fixed in casing 1, plug connector 8 is established to the one end of double wiring harness 6, the other end extends in casing 1, the welding has magnetic resistance element sequence 9 on the circuit board 5, magnetic resistance element sequence 9 is fan-shaped and arranges, the both ends of magnetic resistance element sequence 9 are connected with double wiring harness 6 respectively, and when swing arm 3 rotated, magnet 7 on the swing arm pointer 2 swings along magnetic resistance element sequence 9 top.
Specifically, the pins of each magnetoresistive element in the magnetoresistive element sequence 9 are sequentially connected in series, and each magnetoresistive element is alternately arranged on an inner arc and an outer arc, that is, in the figure, Q1, Q3, Q5, Q7, Q9 and Q11 are located on an inner arc, and Q2, Q4, Q6, Q8 and Q10 are located on an outer arc, so as to form a sector arrangement.
In addition, the swing arm type liquid level sensor also comprises a wire passing plug 10, a gland 11, a bottom plate 12 and a stainless steel connecting pipe 13, wherein the wire passing plug 10 is fixed on the outer side surface of the bottom plate 12 through the gland 11, one end of the stainless steel connecting pipe 13 is inserted on the bottom plate 12 from the inner side surface of the bottom plate 12, and the other end of the stainless steel connecting pipe is inserted on the shell 1; the double-wire harness 6 sequentially passes through the wire plug 10, the bottom plate 12 and the stainless steel connecting pipe 13 and then extends into the shell 1.
Preferably, the inner side of the bottom plate 12 is provided with a gasket 14 for increasing the sealing property.
Preferably, the swing arm type liquid level sensor further comprises a wire harness protection tube 15, and the wire harness protection tube 15 is sleeved on the double wire harness 6 between the plug connector 8 and the wire passing plug 10.
The utility model discloses when using, to the liquid level detection of vehicle oil tank for the example. Firstly, the plug connector 8 is connected with a vehicle control system, and then the inner side surface of the bottom plate 12 is arranged on the outer wall of an oil tank, so that the swing arm 3, the floater 4 and corresponding parts in the shell 1 are arranged in the oil tank, and the swing arm 3 can swing along a vertical surface. When the liquid level in the oil tank changes, the swing arm 3 swings along with the floater 4, the swing arm pointer 2 swings to the position above the corresponding magnetic resistance element at the moment, the resistance value of the magnetic resistance element is changed by the generated magnetic field, and different signals are output by the whole circuit, so that the liquid level information of the oil tank is obtained.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (5)
1. The utility model provides an arm swing type level sensor based on magnetic resistance non-contact, includes casing (1), swing arm pointer (2), swing arm (3), float (4), circuit board (5) and double wiring harness (6), swing arm pointer (2) activity is established in casing (1), and is equipped with magnet (7) on swing arm pointer (2), swing arm (3) are connected with swing arm pointer (2), the end in swing arm (3) is established in float (4), circuit board (5) are fixed in casing (1), plug connector (8) are established to the one end of double wiring harness (6), and its characterized in that is extended to in casing (1) to the other end: the circuit board (5) is welded with a magnetoresistive element sequence (9), the magnetoresistive element sequence (9) is arranged in a fan shape, two ends of the magnetoresistive element sequence (9) are respectively connected with the double wiring harnesses (6), and when the swing arm (3) rotates, a magnet (7) on the swing arm pointer (2) swings along the upper side of the magnetoresistive element sequence (9).
2. A magnetoresistive non-contact swing arm type liquid level sensor according to claim 1, wherein: the pins of all the magneto-resistive elements in the magneto-resistive element sequence (9) are sequentially connected in series, and all the magneto-resistive elements are alternately arranged on an inner arc line and an outer arc line.
3. A magnetoresistive non-contact swing arm type liquid level sensor according to claim 1, wherein: the swing arm type liquid level sensor further comprises a wire passing plug (10), a gland (11), a bottom plate (12) and a stainless steel connecting pipe (13), wherein the wire passing plug (10) is fixed on the outer side surface of the bottom plate (12) through the gland (11), one end of the stainless steel connecting pipe (13) is inserted into the bottom plate (12) from the inner side surface of the bottom plate (12), and the other end of the stainless steel connecting pipe is inserted into the shell (1);
the double-wire harness (6) sequentially penetrates through the wire passing plug (10), the bottom plate (12) and the stainless steel connecting pipe (13) and then extends into the shell (1).
4. A magnetoresistive non-contact swing arm type liquid level sensor according to claim 3, wherein: and a sealing gasket (14) is arranged on the inner side surface of the bottom plate (12).
5. A magnetoresistive non-contact swing arm type liquid level sensor according to claim 3, wherein: swing arm type level sensor still includes pencil protection tube (15), pencil protection tube (15) cover is on plug connector (8) and the double-line pencil (6) between crossing line stopper (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738359.7U CN209992042U (en) | 2019-05-16 | 2019-05-16 | Swing arm type liquid level sensor based on magnetic resistance non-contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920738359.7U CN209992042U (en) | 2019-05-16 | 2019-05-16 | Swing arm type liquid level sensor based on magnetic resistance non-contact |
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| CN209992042U true CN209992042U (en) | 2020-01-24 |
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| CN201920738359.7U Active CN209992042U (en) | 2019-05-16 | 2019-05-16 | Swing arm type liquid level sensor based on magnetic resistance non-contact |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486929A (en) * | 2020-05-07 | 2020-08-04 | 合肥邦立电子股份有限公司 | Three-wire linear liquid level sensor based on magnetic resistance non-contact |
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2019
- 2019-05-16 CN CN201920738359.7U patent/CN209992042U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486929A (en) * | 2020-05-07 | 2020-08-04 | 合肥邦立电子股份有限公司 | Three-wire linear liquid level sensor based on magnetic resistance non-contact |
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