Hall current sensor is a sensor that detects current by relying on electromagnetic characteristics. It can indirectly measure the current of current-carrying conductor by measuring the Hall potential, making the non-contact measurement of current possible. Hall current sensors mainly include two types: open-loop and closed-loop. The closed-loop Hall current sensor is also called a zero-flux Hall current sensor.

With the gradual maturity of drone R&D technology, drones have attracted attention in all walks of life for their low-altitude flight, low cost, flexible maneuverability, and rapid response. They are widely used in civilian fields, such as agricultural plant protection, power inspections, and police enforcement, geological prospecting, environmental monitoring, forest fire prevention, film and television aerial photography, etc. However, with the rapid development of UAV market, constraints such as limited battery life have gradually become prominent. In this case, power management chip technology has become one of the key factors affecting the quality of drones.

Electric bicycles, also known as e-bikes, are powered by batteries on the basis of bicycles. It combines the flexibility and lightness of bicycles with the advantages of electric vehicles that saves manpower and has high endurance, which can meet people's needs for short-distance travel. The demand for electric bicycles has increased substantially in recent years. Office workers in many cities use electric bicycles as a tool for commuting.

A smart wearable device is a hardware terminal that combines multimedia, sensing, identification, wireless communication, cloud services and other technologies with daily wear to realize user interaction, life entertainment, health monitoring and other functions. There are smart watches, smart bracelets, smart glasses, smart clothing and so on in our common life. Whether we use smart wearable devices to track steps or record sleep time, we all hope that the devices we use are accurate and reliable. Therefore, in order to ensure the reliability and accuracy of the device, smart wearable devices must be completed strict and comprehensive test before delivery.

The fuel cell voltage monitor (CVM) is an important part of fuel cell engine system and stack inspection. It has the characteristics of multiple channels, fast response and high voltage measurement accuracy. It can perform real-time analysis of the monitored voltage data group, comprehensive and rapid fault diagnosis, and real-time monitoring, diagnosis, storage and query of the status and performance of the fuel cell stack monolithic, which can ensure the stability and reliability of the fuel cell, and improve the working efficiency of the fuel cell.

The role of battery simulator is to emulate various output states and charging & discharging characteristics of real batteries...