Multi-layer circuit board installing structure with vibration resistance

Abstract

The invention relates to the field of circuit installation and design, particularly to a multi-layer circuit board installing structure with vibration resistance. The multi-layer circuit board installing structure with vibration resistance can ensure resistance of circuit integral structures to random vibration. Due to the fact that environmental vibration conditions of accelerator sensors are improved from original sinusoidal vibration to random vibration, test level of random vibration is improved from low requirements of an aircraft cabin to high requirements of positions close to an engine. According to the multi-layer circuit board installing structure with vibration resistance, a base is provided with a support column, a first layer of circuit board is installed on the journal of thesupport column, a second layer of circuit board is separated from the first layer of circuit board as well as a plurality of upper layers of circuit boards through sleeves, and a top layer of circuitboard is fixed onto the support column through a nut and a spring washer. The multi-layer circuit board installing structure with vibration resistance prolongs the service life and improves reliability of the accelerator sensor.

Description

technical field [0001] The invention relates to the field of circuit installation and design, and specifically relates to a multi-layer circuit board installation structure with anti-vibration effect, which ensures that the overall structure of the circuit is resistant to random vibration. Background technique [0002] Usually, in order to ensure the accuracy of acceleration measured by the acceleration sensor and eliminate installation errors, the acceleration sensitive core is directly installed on the base, and the acceleration signal processing circuit is installed on the base through a pillar. Since the environmental vibration condition of the acceleration sensor has been improved from the sinusoidal vibration in the past to random vibration, the test value of random vibration has also moved from the low requirement of the aircraft cockpit to the high value close to the engine. Therefore, the anti-vibration performance of the acceleration signal processing circuit direc...

AI Technical Summary

Problems solved by technology

The installation structure has poor anti-vibration performance, and has the following disadvantages: First, since each layer of circuit board components is fastened by pillars, the vibration stress is relatively concentrated, especially if there are circuit board components with large mass and pillars. Tight parts are most likely to break

Second, each layer of circuit boards and pillars has an amplification of the vibration amplitude of the base, which accumulates sequentially. The circuit board farthest from the base has the largest amplification of the vibration amplitude. The circuit board is easy to collide with the shell of the acceleration sensor, reducing the vibration amplitude. The life and reliability of the accelerometer

Third, the installation structure involves a large number of pillars. Due to the limitation of the installation space, the outer diameter of the pillars cannot be very large. In order to install the circuit board and pillars on the next layer, threaded holes must be processed on the pillars, and the structure is more complicated.

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