Is the pressure sensor under the computer keyboard?
No, what? I forgot about it. It's not pressure sensing anyway
Touch sensorThe sensor (English Name: transducer/sensor) is a detection device, can feel the measured information, and can feel the information, according to the law must transform into electrical signals or other information in the form of output required to meet the information transmission, processing, storage, display, record and control requirements.The characteristics of sensors include micromation, digitalization, intelligentization, multifunction, systematization and networking. It is the first step of automatic detection and automatic control. The presence and development of sensors allow objects to sense sense of touch, taste, and smell, allowing the object to grow alive. Usually according to the basic cognitive function is divided into a heat sensitive element, a photosensitive element, gas sensor, force sensor, magnetic sensor, humidity sensor, acoustic sensor, radiation sensitive element, color sensitive components and sensors and ten kinds of flavor.
The computer keyboard is a commonly used sensor. As shown in the figure below each key on the keyboard is a small piece of metal, a certain air gap and vibration of the metal sheets is a small fixed metal sheet, the two pieces of metal to form a small capacitor when the button is pressed. This small capacitor, capacitance change, electronic circuit connected to detect which key is pressed, which gives the corresponding signal.When the capacitor is deformed by compression, the pressure signal is changed into an electrical signal, so the keyboard adopts a pressure sensor.
