Proximity sensor eight classic applications, you know a few

At present, proximity sensors are widely used in various industries such as aerospace, industrial production, transportation, consumer electronics, etc. Here are a few typical application scenarios, so that you can open them in the application design of proximity sensors. Some ideas.

Application of proximity sensor in touch screen mobile phone

Proximity sensors use MEMS technology and have been popularized in smart phones.

At the beginning of the popularity of touch screen phones, users discovered a flaw in the touch screen: when we pick up the phone in the most common gesture, our face often touches the touch screen and accidentally clicks on the hang-up button or the hands-free button, causing Unnecessarily embarrassing. Therefore, mobile phone manufacturers use MEMS technology to design MEMS proximity sensors into touch screen mobile phones, which automatically lock the screen when receiving a call to avoid false triggers. In addition, the backlight can be turned off while the screen is locked, which can effectively save energy and extend the standby time.

Smartphones use MEMS ambient light sensors and proximity sensors: ambient light detection (using the amount of light detected by the light-receiving part to determine the surrounding brightness based on the illuminance of the sensor) and proximity detection (lighting from a light-emitting source equipped with a sensor) On the measurement object, the distance to the measurement object is judged based on the amount of light reflected on the proximity light-receiving part of the sensor). The ambient light sensor can optimize the lighting of the LED backlight, so that our mobile phone can self-adjust to the appropriate brightness in any environment, whether it is in a dim movie theater or a well-lit outdoor. The proximity sensor can turn off the touch screen when answering a call, so that we will not touch the buttons on the screen to suddenly hang up the phone or click on other functions.

Application of Capacitive Proximity Sensor in Automotive Electronics

The demand for proximity detection sensors in the automotive electronics application field has been steadily rising. The possible applications of proximity detection in the automotive electronics industry are limitless, such as:

Car access control: detect the hand close to the door handle, and then start the unlocking procedure. When the palm is close to the surface of the screen, it can illuminate and wake up the touch screen. When the palm is close to the sensor, the interior lighting can be turned on/off. Simple detection of the palm in the air Action to turn on/off the device to detect large obstacles around the car during parking

There are a variety of proximity detection methods for various automotive electronic application requirements, such as capacitive sensing, infrared, ultrasonic, optical, etc. For proximity detection from 5mm to 300mm, capacitive sensing technology has many advantages over other technologies: excellent reliability, simple mechanical design, low power consumption and low cost.

Application of Proximity Switch Sensor on Screen Door

For safety, subway screen doors are increasingly used by subway platforms. Proximity switch sensors will be heavily invested in the technical application of screen doors, and subway accidents will be minimized in the application of sensors.

At present, the common scheme used by the screen door system to detect the opening and closing of the door is to detect the opening and closing of the door through two proximity switches. Since the proximity sensor can detect in a non-contact manner, it will not wear and damage the detection object. This is also one of the main reasons why it is suitable for installation on the subway. As the performance of the proximity sensor is further improved, it will be used in more occasions. In the future, it will be widely used not only on subway doors, but also on other screen doors such as buses.

Application of Human Proximity Sensor in the Monitoring of ATM Cash Machine

The human proximity sensor is a control device used to detect the proximity of the human body. It can accurately detect the proximity of nearby people and is currently the best choice for alarm and status detection. Its sensing part has a high detection sensitivity to nearby people's movement, and it suppresses the sound signal of the surrounding environment, and has a strong anti-interference ability. The internal use of microcircuit chip for program control processing has high detection sensitivity and trigger reliability. The detection and control parts are combined into one. The waiting power consumption is low. The switch signal output directly triggers the alarm recording.

Since the sensitivity of human body induction is continuously adjustable, this makes the human body proximity sensor suitable for many different occasions. In terms of security and anti-theft, such important places as data files, accounting, finance, museums, and vaults are usually equipped with anti-theft devices composed of various proximity sensors.