Microwave Multi-Span Sensor 'BSS201-P1'

The blog introduces the daily activities of Pal Giken. Please visit the website below.

The blog introduces the daily activities of Pal Giken. Please visit the website below.

At Pal Giken, we are developing various sensors that use "microwaves," and this time we will explain how they detect intrusions. ◆◆ Two Detection Methods ◆◆ Our microwave sensors support two detection methods. 1) Beam Reflection Detection Method A single sensor is installed, and the transmitted wave output from it defines the detection area. The detection range depends on the antenna angle of the sensor, but the sensor alone covers a wide distance. When a target intercepts the transmitted wave from the sensor, it is received as a reflected wave and detected as an "intrusion." 2) Beam Interruption Method This method configures the detection area by positioning the sensor and reflector opposite each other. The transmitted wave output from the sensor hits the reflector and is received as a reflected wave. There are also products that configure the detection area using a transmitter and receiver. In this case, the transmitted wave output from the transmitter is received by the receiver. In both cases, the levels that serve as the basis for transmission and reception are monitored, and if the wave is interrupted due to an intrusion, causing the level to fall below a threshold, it is detected as an "intrusion."

Microwaves are a type of radio wave and a form of electromagnetic wave. Electromagnetic waves propagate as repeating waves, and the number of repetitions per second is called frequency (measured in hertz, Hz). The length from the peak of one wave to the peak of the next is called wavelength. The name of electromagnetic waves changes according to their frequency, and their applications also vary based on their characteristics. In our company, we refer to radio waves with frequencies ranging from 3 GHz to 30 GHz (wavelengths from 10 cm to 1 cm) as "microwaves," and we use 24 GHz band radio waves in our microwave sensors. ◆◆ Features of Microwaves ◆◆ The features of microwaves include: - High directivity - Resistance to weather changes such as rain, fog, and snowfall - Ability to penetrate materials like resin, making them unaffected by obstacles These features, combined with our unique algorithms (signal processing technology), enable long-distance detection even in harsh environments. Additionally, our sensors can be used without a license. They can be used both indoors and outdoors in Japan, allowing for installation in various situations.