Ultrasonic sensors are sensors that convert ultrasonic signals into other energy signals (usually electrical signals). The ultrasonic wavelength is very short, the diffraction phenomenon is small, especially the directionality is good, and it can become ray and directional propagation. It is therefore reliable in any lighting environment and can be used indoors or outdoors. Ultrasonic penetration of liquids and solids is very large, especially in sunlight opaque solids, which can penetrate depths of tens of meters. When an ultrasonic wave strikes an impurity or interface, it produces a significant reflection to form a reflection of the echo, which can produce a Doppler effect when it hits a moving object. Therefore, sensors based on ultrasonic characteristics are called "ultrasonic sensors" and are widely used in industrial, defense, and biomedical applications. Next, the editor of the mining network will talk about the related applications of ultrasonic sensors.


Implementation of UAV obstacle avoidance technology
The drone market is growing rapidly, and the obstacle avoidance technology as a guarantee to increase the safe flight of drones is also changing with the development of technology. No one can collect the surrounding environment information through sensors during the flight process, and measure the distance to make corresponding The action instructions to achieve the obstacle avoidance. In fact, obstacle avoidance technology has its use in drones, but the application scenarios are different. At present, the well-known obstacle avoidance technology is commonly used as infrared sensors, ultrasonic sensors, laser sensors and visual sensors.


With the current demand for technology and technology, the obstacle avoidance function of the drone needs a technology that can cope with multiple obstacles. That is to say, in the current technology, the current drone ranging is generally effective through the ranging type. The load measures the distance of the drone to an object, and can be calculated by the wavelength, wave speed, and feedback time of the specific wave. For this reason, the technicians of the mining network introduced an ultrasonic obstacle avoidance sensor-MB1043. The sensor is a high-resolution (1mm), high-precision, low-power ultrasonic sensor. It is designed to not only deal with interference noise, but also has anti-noise immunity. Moreover, sensitivity compensation is performed for targets of different sizes and varying supply voltages. In addition, standard internal temperature compensation is provided to make the measured distance data more accurate. Used in indoor environments, pedestrian detection, small target detection, high sensitivity applications, robotic ranging obstacle avoidance, and drone ranging obstacle avoidance. It is a very good low cost solution!


Application technology of ultrasonic sensors in the automotive industry

In recent years, ultrasonic technology has made rapid progress, and its application has become increasingly widespread, especially in the automotive field, its efficacy is quite remarkable. First, in the traffic control system, ultrasonic sensors are used to detect the flow rate and speed of road vehicles. Secondly, an ultrasonic sensor is used as an anti-collision device for automobiles. Using the ultrasonic sensors installed in the front and rear corners of the car, all kinds of obstacles are found. The buzzer and the indicator light are used to tell the driver the approximate distance and direction between the obstacle and the car so that the driver can adjust the position in time to release the driver's parking. The trouble caused by the front, rear, left and right visits when reversing and starting the vehicle, and helping the driver to remove the defects of blind spots and blurred vision, and improve driving safety. In terms of use effect, the ultrasonic radar has strong penetrability, and the method of ranging is simple and the cost is low. However, since ultrasonic waves are mechanical waves, their effects are affected by the propagation medium. For example, due to weather conditions, the transmission speed of ultrasonic waves is different under different weather conditions, and the propagation speed is slow. In addition, when the car is driving at a high speed, the use of ultrasonic ranging cannot keep up with the car's distance in real time, and the error is large, which affects the measurement accuracy.


For such cases, the technicians of the mining network provide the ultrasonic human body detecting sensor MB1004 to assist the driver of the vehicle, especially the industrial or commercial vehicle, in recognizing the nearby obstacles to detect the living things in the vehicle, and the car will be issued after the door is locked. Warning signal. Ultrasonic human body detection sensor MB1004 is a proximity sensor with high and low level alarm signal output. The measuring range is up to 213cm, which is suitable for pedestrian detection and parking detection. When the pedestrian enters the detection range, MB1004 will output an alarm signal that changes from low level to high level. At the same time, it also has the function of outputting the target specific distance, and output distance data through RS232. The MB1004 is a very low cost human body detection ultrasonic sensor.


Application of ultrasonic sensor in smart home automation

The development of family information relies on the development of the Internet of Things, which is achieved by the cooperation between machines. The sensor is the heart of it. Smart homes In the field of automated processes, systems such as process control, process safety, job management and asset utilization require sensors to measure, analyze and control system settings. Household appliances in the home also involve position sensors, proximity sensors, level sensors, flow and speed control sensor technologies are used to improve accuracy, reliability and efficiency. Modern smart appliance designs require multiple sensors to be placed in each unit. As the "first mover" of the development of the Internet of Things, the sensor is the core element of the connected home scene. At present, the pain point of the development of smart home is still controlled by the "sensing technology".