Fiber Optic Sensor

An optical fiber sensor is a sensor that converts the state of the measured object into a measurable light signal. The working principle of the optical fiber sensor is to send the incident light beam from the light source into the modulator through the optical fiber. The interaction between the modulator and the external measured parameters determines the optical properties of the light, such as the intensity, wavelength, frequency, phase, polarization state, etc. It changes and becomes a modulated optical signal, which is then sent to the optoelectronic device through the optical fiber and passed through the demodulator to obtain the measured parameters. During the whole process, the light beam is introduced through the optical fiber, passes through the modulator, and then emitted. The role of the optical fiber is first to transmit the light beam, and secondly to act as an optical modulator.

Direction of development

Sensors are developing towards being sensitive, accurate, adaptable, compact and intelligent. In this process, fiber optic sensors, a new member of the sensor family, are highly favored. Optical fibers have many excellent properties, such as: resistance to electromagnetic and atomic radiation interference, mechanical properties of thin diameter, softness, and light weight; electrical properties of insulation and non-induction; chemical properties of water resistance, high temperature resistance, and corrosion resistance, etc. , it can serve as people's eyes and ears in places that are beyond human reach (such as high temperature areas) or areas that are harmful to people (such as nuclear radiation areas), and it can also transcend human physiological boundaries and receive human senses. External information that cannot be felt.

Features

1. Because prisms are used in the reflector, its detection performance is higher and more reliable than general reflective light-controlled sensors.

2. Compared with the separate light-controlled sensor, the circuit connection is simpler and easier.

3. The embedded design of the snap-on buckle makes installation easier

Application

1. Used for digital transmission such as telephone and network broadband.

2. The passage of banknotes, cards, coins, passbooks, etc. used in vending machines, financial terminal-related equipment, and money counting machines

3. Used for product positioning, counting and identification on automation equipment