Acoustic insulating material for ultrasonic sensor and preparation method thereof

Abstract

The invention discloses an acoustic insulating material for an ultrasonic sensor. The material is characterized by consisting of the following components in percentage by weight: 60 to 85 percent of epoxy resin, 3 to 10 percent of foaming agent, 5 to 15 percent of toughening agent, and 5 to 20 percent of curing agent. The method is simple, and the porosity of the acoustic insulating material for the ultrasonic sensor prepared by utilizing the method can reach 300 to 800 meshes, therefore, the acoustic insulating effect is good, the service life is long, and the stability is high.

Description

technical field [0001] The invention relates to the field of sensor materials, in particular to sound-insulating materials for ultrasonic sensors. Background technique [0002] Reversing is an action that ordinary cars often perform. In the narrow alleys or parking areas of the city, only relying on the driver's superb and skilled driving skills, it is very easy to avoid adjacent vehicles or obstacles. With the continuous advancement of industrial technology, there are already ultrasonic sensors on the market that can assist the car to reverse accurately. When the distance between objects or vehicles behind the car is less than the set value, the driver will be notified by an alarm or other display methods as a reference for reversing, effectively avoiding disturbing mutual collision accidents. [0003] The existing ultrasonic sensor for reversing uses ultrasonic technology to achieve the purpose of detecting distance. The sensor is fixed at the center of the rear of the ca...

AI Technical Summary

Problems solved by technology

[0004] Common ultrasonic sensors emit ultrasonic waves in both forward and backward directions when vibrating, and the ultrasonic waves emitted to the auxiliary radiation surface are useful waves for detecting obstacles. The impact of the emitted wave needs to be absorbed, and the degree of absorption affects the performance parameters of the product. The conventional method is to use different types of sound-absorbing materials for sound-absorbing, or use hard filling materials to suppress the vibration of the piezoelectric ceramic sheet to reduce residual noise. These two methods have several disadvantages. 1. There are many sound-absorbing materials used in the production process, which are not easy to control, resulting in poor product consistency.

2. Yu Zhenda

3. Poor test performance in high and low temperature environments, not resistant to high and low temperature impacts, filling materials cannot return to their original shape after high and low temperature impacts, resulting in irregular cavities in the entire product, resulting in unqualified product parameters after environmental performance tests