Application of EPSON XV4001BC Gyroscope Sensor in Automotive Navigation System

In recent years, in order to improve the reliability of automotive application systems, sensor fusion systems have been increasingly applied in the automotive field, such as pedestrian detection and pre collision warning in automotive navigation systems. By providing accurate navigation information, drivers are provided with a safer, more stable, and more comfortable travel experience. For example, in pedestrian detection systems, only low-cost infrared sensors cannot detect the actual position of pedestrians, The use of sensor arrays can excellently accomplish this task. Similarly, in the pre collision warning system, the fusion of radar and laser scanner sensors can timely and accurately predict the impact time and position. The car navigation system is a good embodiment of sensor fusion. The system uses gyroscopes to judge the vehicle's steering information, accelerometers to judge the vehicle's uphill and downhill status, and speed signals to calculate the driving distance, By coordinating actions with multiple sensors, the dependence on GPS signals is greatly reduced, measurement errors are reduced, navigation accuracy is improved, and more accurate navigation services are provided to users.

For the selection of sensors for the automotive navigation system, this article adopts the ultra small gyroscope sensor provided by Epson Crystal Oscillator Company, model XV4001BC, with a very small packaging size of 5.0x3.2x1.3mm, as well as higher stability. The use of vibration crystals has outstanding advantages such as lower power consumption. Typically, automotive navigation systems require multiple sensors to work together, making them a closely connected system, The high-precision and low-power consumption characteristics of XV4001BC can well adapt to the needs of in vehicle environments. When the vehicle loses GPS signals during complex navigation processes, the navigation system can calculate the current position through gyroscope signal trajectories combined with acceleration, speed signals, and other sensors, ensuring navigation continuity and normal operation in a short period of time. The XV4001BC gyroscope sensor uses a vibrating crystal oscillator to achieve high stability, And it has an output terminal with a temperature sensor, with a wide working temperature range of -40 ° C to+85 ° C.

Epson Crystal Oscillator provides specialized automotive gyroscope sensors with AEC-Q certification for automotive industry applications. The automotive gyroscope sensors use original dual T structure quartz crystal elements, which have high operating and storage temperature, high reliability, including self diagnosis function, ultra small size, light weight, and excellent impact and vibration resistance. Epson gyroscope is a sensor specifically used to measure the angular velocity of objects in space motion, By utilizing the piezoelectric effect of crystals to detect changes in velocity, it is possible to achieve small volume and strong stability of crystals. Even if the surrounding temperature changes, the sensitivity and zero point output of the product can remain stable and stable. In addition, gyroscopes also have advantages such as high detection accuracy and wide detection range. EPSON's standard gyroscope sensors come in various sizes, detection axes, scale factors, detection rate ranges, and analog and digital outputs for any application, Epson's gyroscopes can be divided into single axis gyroscopes and multi axis gyroscopes based on the number of measurement axes, and can be divided into analog output gyroscopes and digital output gyroscopes according to the different forms of output signals.