How long is the interval between multiple human body sensors for professional radar presence sensor manufacturers

Professional radar presence sensor manufacturers How long is the interval between multiple human sensors? The 5.8GHz radar presence sensor is used for biological detection such as movement, fretting, and breathing signals. The 24GHz radar presence sensor is used for heartbeat signal detection, unlocking the application possibilities of microwave sensors in smart homes, smart buildings, smart elderly care, security monitoring and other fields.

A radar presence sensor is a device that uses the characteristics of microwaves to detect some physical quantities. Including the presence, motion speed, distance and angle information of the sensed object. The microwaves emitted by the transmitting antenna are absorbed or reflected when they encounter the measured object, thus changing the power. The microwave detection is realized by receiving the microwave reflected by the measured object or the measured object through the receiving antenna, converting it into an electrical signal, and then processing it through the measuring circuit.

The radar presence sensor is mainly composed of a microwave oscillator and a microwave antenna. A microwave oscillator is a device that generates microwaves. Devices that make up microwave oscillators include snap-tunes, magnetrons, or some solid-state element. The oscillating signal generated by the microwave oscillator needs to be transmitted through the waveguide and transmitted through the antenna. In order to make the direction of the emitted microwave consistent, the antenna should have a special structure and shape.

The 24GHZ radar presence sensor is also a microwave sensor. The common frequency bands are 10GHZ, 24GHZ, 35GHZ, and 77GHZ, of which 24GHZ and 77GHZ are often used in traffic speed radar, car lane change assist system, water level gauge, car ACC radar cruise system, overhead crane collision prevention, airport intrusion prevention, automatic door sensing , faucet sensor, etc. Compared with the traditional horn antenna microwave sensor, the sensor adopts planar microstrip technology, which has the characteristics of high stability, small size and sensitive induction. Choosing a good radar presence sensor supplier and a high-performance sensor can help improve work efficiency.

Install multiple sensors at appropriate intervals

Intelligent human radar presence sensors are increasingly used in family life, bringing a lot of convenience to our lives. Especially for families with babies and seniors who often need to get up at night. After installing the human body sensor, the light can be turned on intelligently, which can avoid the problem of exploring the switch and turning on the light in the dark.

In addition, the set light source is soft and will not produce a dazzling feeling after the light, which is very friendly to the eyes, and many advantages make the human body induction light more popular. The human presence sensor is actually a new technology design that uses the principle of electromagnetic wave reflection to sense human activity information. It is a sensor specially designed to detect and sense human activity information.

When a person or an object with temperature enters the sensing range, the sensing module will output a high-level pulse signal or a high-level delay signal. The output induction pulse or delay signal can directly drive the LED light indicator and LED light.

Usually, the active emission frequency of the human body sensor and driving circuit is 5.8GHz microwave signal. When there is a moving object in the outside world, according to the Doppler effect (when the wave source is close to the observer, the receiving frequency of the wave source is higher, and the receiving frequency of the wave source is lower when the wave source is far away from the observer), the signal is fed back to the transmitting device, triggering the changing state of the lamp, from Light to full brightness.

However, when multiple human presence sensors are installed together, if the distance between the lights is too close, the radar signal sent by the A light may be received by the B light, so that the feedback signal received by the B light is not its own feedback signal. It is the emission signal of the A lamp. Signal interference takes the form of mutual addition or mutual reduction, thus causing the inductive switches to interfere with each other. Common misoperations in the interference state are: always bright (the device is always in the trigger state); always dark (the device cannot be triggered); the sensing distance is short.

So, when installing multiple human radar sensors, what is the appropriate spacing between lamps? After many practical tests, the interval between the two lights is kept at more than 1.8 meters, and there is basically no interference.