Novel control method for ultrasonic sensor sensibility and aftershock and novel ultrasonic sensor

Abstract

The invention discloses new controlling method for the sensibility and residual vibration of an ultrasonic sensor. The sensibility and residual vibration are precisely controlled by changing the pre stress of a piezoelectric chip. A novel ultrasonic sensor is provided, which essentially comprises a metallic casing, a piezoelectric chip, a circuit board, a lead-out pin, a pressure block for controlling the stress of the piezoelectric chip, a silencing cotton layer for absorbing the residual vibration of the sensor, and a silica gel filler. In the circuit board, a threaded through hole is provided. In the through hole, an adjuster is provided. The lower end of the adjuster is movably connected with the upper end of the pressure block. The invention can accurately control the sensibility and residual vibration of a product by simply changing the production equipment and without changing the raw materials, so that the product can meet requirements from different customers, and the applicability and the acceptance rate of product can be improved. The invention saves cost, improves productivity, and the most important benefit with the invention is that the performance consistency of the adjusted product is almost up to 100%.

Description

technical field [0001] The invention relates to the technical field of range-finding sensors, in particular to a new control method for the sensitivity and aftershock of an ultrasonic sensor used as a range-finding radar for detecting the distance between a load and surrounding obstacles, and a new type of ultrasonic sensor. Background technique [0002] At present, the sensors that detect the distance between the load and the surrounding obstacles all use ultrasonic sensors, which use ultrasonic technology to achieve distance detection. The ultrasonic sensor intermittently emits ultrasonic pulse signals and receives the ultrasonic pulse signals reflected back by the object. The time difference between the two pulse signals is used to measure the distance between the load and the obstacle. The distance calculated by the measurement is set according to the warning range. Values ​​are compared and judged, and corresponding response actions are made to achieve the purpose of al...

AI Technical Summary

Problems solved by technology

[0006] The pass rate of the measurement sensitivity, aftershock and accuracy consistency of the produced products is low

Especially when mass production is carried out for bulk orders, the ordering parties often require that the measurement sensitivity, aftershock and accuracy of the ultrasonic sensors ordered should be consistent, which has brought huge problems to the production enterprises—the production does not meet customer requirements. Most of the products are only scrapped, and their applicability is poor. At the same time, in order to meet the requirements of customers, they have to continue to produce products for re-testing. This process of repeated production, testing, and re-production not only seriously reduces production efficiency, but also increases for enterprises. Huge cost

[0007] Among the many reasons for the difference, the most important ones are: one is the influence of the poor consistency of the raw materials used, which leads to large dispersion of product performance and a large number of by-products; the other is the constraints of the current production equipment and poor technology

Although the former can use raw materials with good consistency for processing and manufacturing, it only reduces the difference between products as much as possible, but at the same time it directly leads to an increase in cost, which undoubtedly brings a huge economic burden to enterprises and customers; while the latter Improving or innovating a set of very mature and reliable production equipment or processes is not something that can be achieved overnight, and the development costs are also huge

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