Sensor and manufacture method

Abstract

The present invention provides a sensor and a manufacture method. The sensor includes a sensing component, conductors connected with the sensing component and an insulating protection layer coating the exterior of the sensor. The sensor is characterized in that the conductors are two conductive films in an FPC conductive tape; the outer layer of the FPC conductive tape is an insulating film; one end of each of the two conductive films is welded to the sensing component, so that an integral body can be formed; and the insulating protection layer is an integral body which is formed by overall PVC extrusion on the sensing component and the FPC conductive tape. The insulating protection layer of the sensor has little possibility of falling off, and the pulling resistance of the insulating protection layer can reach 200N; the sensor has little possibility of being internally flooded with water; the sensor will not fail after being immersed in 100-Celsius degree boiling water for 4000 hours; and the service life of the sensor can be improved. The manufacture method has the advantages of simplicity, high production efficiency and low manufacture cost.

Description

technical field [0001] The invention belongs to the technical field of sensor production and is mainly used for the detection of parameters such as temperature and pressure, specifically a sensor and a production method thereof. Background technique [0002] The structure of the existing sensor is to connect the sensing element (such as thermistor) with the metal wire inside the cable, and then use epoxy resin to encapsulate the sensing element (such as thermistor) and the connection point into the shell (plastic shell Body or metal housing), the main disadvantages of existing temperature sensors are as follows: [0003] 1. The shell is easy to fall off: the shell and epoxy resin are two different materials with different expansion coefficients. Therefore, the two are integrated at room temperature during production. It is stipulated in the temperature sensor industry standard that the tensile force standard of a new temperature sensor product entering the factory is that i...

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Problems solved by technology

[0003] 1. The shell is easy to fall off: the shell and epoxy resin are two different materials, and their expansion coefficients are different. Therefore, the two are connected together at room temperature during production.

It is stipulated in the temperature sensor industry standard that the tensile force standard of a new temperature sensor product entering the factory is that it can withstand a tensile force of 20N, but its shell will fall off due to constant changes in temperature and temperature during use;

[0004] 2. Water ingress failure: epoxy resin and cable insulation material PVC are also two different materials. Under repeated cold and heat changes, gaps will appear between the epoxy resin and PVC material, causing water vapor to enter the welding point. lead to failure

In fact, many temperature sensor products do not meet the indicators required by the standard

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