Design and Implementation of Car Door Latch Testing Machine

Abstract

Abstract: In this project, we proposed design and implementation of car door latch testing machine. Nowadays cars are a very important part of this modern world because they give luxury and comfort. Even though they are comfortable, some problems always keep arising on the safety side. After a lot of research they rectified certain problems using air bags, auto parking, turbo charger ... etc. Likewise “car door latch” is also plays a major role in safety side in automobiles now we are going to discuss about one such problem that arises on the safety side. An unexpected accident occurs when people smash their fingers in between the car doors. Due to this kind of accident around 120,000 people are injured every year. But this was not taken as a very major safety concern for the customer. To avoid this kind accident due to car doors that we make sure of testing of car door latch using latch testing machine by analysing sealing factor, release travel, full release travel, latch opening current, release effort and testing position of the screw by using proximity sensor and to check the presence of the latch cover by using non-contact sensor (photo electric sensor). The working process of the “CAR DOOR LATCH TESTING MACHINE” is, when car door latch is placed in clamp cylinder that fix work piece in place. Then using servo motor actuator, the cylinder is moved forward to lock the latch and load cell is used to measure the sealing factor of car seal (rubber type) when the cylinder is moved in reverse direction. Release travel is measured using LVDT