CN215894661U - Magnetoelectric sensor - Google Patents

Abstract

The utility model relates to a magnetoelectric transducer, which is arranged in a horn slot of a circuit board, the transducer structure comprises a framework, a group of conductive coils and 2 soft high-temperature leads, wherein the framework is processed by 1J50 permalloy, a high-temperature enameled wire with the wire diameter of phi 0.04 is used for winding and fixing the turns, a middle outgoing wire is connected with a high-temperature wire with the wire diameter of phi 0.38 and not less than 20mm, and finally, the high-temperature wire is encapsulated by epoxy resin. The magnetoelectric sensor is small in product size and light in weight; the method has high measurement precision and large measurement range; the anti-interference capability is strong, and the stability is good; the installation is convenient, the maintenance is simple, and the operational reliability is high.

Description

Magnetoelectric sensor

Technical Field

The utility model relates to a magnetoelectric sensor, in particular to a magnetoelectric sensor for measuring rotating speed.

Background

A magnetic circuit system generating a constant direct current magnetic field, and a permanent magnet is generally adopted to reduce the volume of the sensor; the other is a coil, which is linked with the magnetic flux in the magnetic field to generate an induced electromotive force. The induced electromotive force is proportional to the rate of change of the magnetic flux or the speed of relative movement of the coil and the magnetic field, and therefore a relative movement must be made between them. The moving member may be a coil or a permanent magnet. Therefore, their structural form, material and structural dimensions must be chosen reasonably to meet the basic performance requirements of the sensor. In the specific calculation, the structural form and the volume size (i.e., the contour dimension) are generally determined according to the use occasion and the use object, and then the magnetic circuit system is preliminarily determined according to the structural size, and the magnetic circuit is calculated so as to determine the magnetic induction B. In this way, the sensitivity S value and the determined B value given by the technical index are used to determine the number of turns N of the coil from S-e/v-BlN. Since the dimensions of the air gap are already determined when the magnetic circuit is determined, the dimensions of the coil are also determined, i.e./. From these parameters, the diameter d of the coil wire can be preliminarily determined. From the viewpoint of improving the sensitivity, the value of B is large and the value of S is also large, so that the magnetic structure should be large in size. The number of turns N can be larger as long as the structural size allows, and the permanent magnet material with the larger value of B is selected. Of course, the increase of the conducting wire during the specific calculation is also limited by other conditions, and the selection of each parameter needs to be considered uniformly and is preferred as much as possible.

The traditional magnetoelectric sensor and the Hall rotating speed sensor can not be stably arranged on a small circuit board, so that the circuit design is complex, and the defects of low rotating speed precision (particularly at low speed), poor anti-interference capability and poor stability exist when the sensor is applied to rotating speed measurement.

SUMMERY OF THE UTILITY MODEL

In order to solve the above disadvantages, the utility model provides a magnetoelectric sensor, which comprises a framework, a group of conductive coils, two soft high-temperature leads and two three-proofing adhesive tapes, and is characterized in that:

the magneto-electric sensor framework is manufactured by processing 1J50 permalloy, a high-temperature enameled wire with the wire diameter of phi 0.04 is used for winding for fixed turns, the middle part is led out, a high-temperature wire with the wire diameter of phi 0.38 and no less than 20mm is connected, and finally epoxy resin is used for encapsulation.

Furthermore, the framework is made of 1J50 permalloy, and one end of the framework is provided with a bulge which is convenient to mount on a circuit board ox horn;

further, the conducting coil outlet end is wound by 5-10 turns, and then a soft high-temperature wire with the length not less than 20mm and the wire diameter of phi 0.38 is welded, and the wire is led out in the middle;

furthermore, the coil part is sealed by using a three-proofing adhesive tape with a proper size after being sealed by using epoxy resin.

Adopt above-mentioned technical scheme's 1 sensor has following beneficial effect:

the product has small volume and light weight, and is convenient to be stably installed on a small circuit board; the method has high measurement precision and large measurement range; the anti-interference capability is strong, and the stability is good; the installation is convenient, the maintenance is simple, and the operational reliability is high.

Drawings

The utility model will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the utility model.

FIG. 1 is a schematic diagram of a magnetoelectric sensor according to the present invention;

description of reference numerals:

1. framework 2, conductive coil 3 and three-proofing adhesive tape

4. High temperature wire 5, epoxy resin

Fig. 2 is a schematic diagram of a framework structure of a magnetoelectric sensor according to the present invention.

Detailed Description

The utility model provides a magnetoelectric sensor, which comprises a framework 1, a conductive coil 2, a three-proofing adhesive tape 3, a soft high-temperature flexible wire 4 and an epoxy resin encapsulation 5 as shown in figure 1. The conductive coil 2 uses a high-temperature enameled wire 2 with the wire diameter of phi 0.04mm, an upper winding machine winds the enameled wire for 5-10 turns, the direction is changed to wind for a fixed number of turns (determined by the required inductance value and resistance value), the wound number of turns is changed again to wind for 5-10 turns, the middle part is led out, and a three-prevention adhesive tape 3 is used for winding the winding part. Then 2 multi-turn outgoing lines are welded to 2 soft high-temperature lines 4 with the length not less than 20mm and the diameter phi of 0.38 mm. The winding part is encapsulated by using the epoxy resin material 5, and the wrapping surface is required to be flat and smooth and not to protrude out of cylinders at two ends of the I-shaped core. The framework shown in fig. 2 is manufactured by processing 1J50 permalloy.

The working principle of the magnetoelectric sensor provided by the utility model is to convert the input motion speed into the induced potential in the coil to be output by utilizing the electromagnetic induction principle. It directly converts the mechanical energy of the object to be measured into electric signal for output. Because the framework is made of 1J50 permalloy, the weight of the magnetoelectric sensor is greatly reduced, and the I-shaped design can freely determine the number of turns of the winding without causing the volume of the magnetoelectric sensor to be greatly changed. The bulge on one end of the framework can be firmly clamped on the makeup designed into the ox horn, so that the sensor can work stably, and the interference to other components on the circuit board can be reduced. The high-temperature wire guided out in the middle of the matching is very convenient to install and maintain. The anti-interference capability of the magnetoelectric sensor is greatly improved by using epoxy resin for encapsulation, and the 2-section three-proofing adhesive tape also has certain waterproof and anti-fouling capabilities.

Claims (4)

1. The utility model provides a magnetoelectric sensor, includes a skeleton, a set of conductive coil, 2 soft high temperature wires, its characterized in that:

the magneto-electric sensor framework is manufactured by processing 1J50 permalloy, a high-temperature enameled wire with the wire diameter of phi 0.04 is used for winding for fixed turns, the middle part is led out, a high-temperature wire with the wire diameter of phi 0.38 and no less than 20mm is connected, and finally epoxy resin is used for encapsulation.

2. The magnetoelectric sensor according to claim 1, wherein said bobbin is formed using 1J50 permalloy, and has a protrusion at one end for easy mounting to a circuit board horn.

3. The magnetoelectric sensor according to claim 1, wherein the conductive coil outlet end is wound by 5 to 10 turns, and then a soft high temperature wire with a length of not less than 20mm and a wire diameter of about phi 0.38 is welded, and a middle outlet wire is welded.

4. The magnetoelectric sensor according to claim 1, wherein the coil portion is encapsulated with epoxy resin and then encapsulated with a suitably sized tri-proof tape.

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