The photoelectric switch is an abbreviation of the photoelectric proximity switch, which uses the object to block or reflect the light beam, and the circuit is connected by the synchronous circuit to detect the presence or absence of the object. Objects are not limited to metal, and all objects that reflect light (or block light) can be detected. The photoelectric switch converts the input current into a light signal on the transmitter, and the receiver detects the target object according to the strength or presence of the received light. A photoelectric switch smoke alarm commonly found in security systems is often used in the industry to count the number of movements of a robot arm.
The photoelectric switch is a kind of sensor, which converts the change of the intensity of light between the transmitting end and the receiving end into a change of current to achieve the purpose of detection. Since the photoelectric switch output circuit and the input circuit are electrically isolated (ie, electrically isolated), it can be used in many applications. A new generation of photoelectric switching devices fabricated using integrated circuit technology and SMT surface mount technology, with intelligent functions such as delay, broadening, external synchronization, mutual interference resistance, high reliability, stable working area and self-diagnosis. This novel photoelectric switch is an active photoelectric detection system type electronic switch using pulse modulation. The cold light source used is infrared light, red light, green light and blue light, which can be non-contact and quickly without damage. And control the state and action of various solids, liquids, transparent bodies, black bodies, soft bodies and smoke. The utility model has the advantages of small volume, multiple functions, long service life, high precision, fast response speed, long detection distance and strong resistance to light, electricity and magnetic interference.
The amplifier split type separates the amplifier from the sensor and is fabricated using an ASIC and a hybrid mounting process. Due to the ultra-small and multi-variable characteristics of the sensor, the amplifier has many functions. Therefore, this type uses the terminal block connection method, and can be used for AC and DC power supplies. With on-off and off-delay function, it can set bright and sound-changing switch, can control 6 kinds of output states, and has two output modes: contact and level.
The amplifier's built-in type integrates the amplifier and sensing, is fabricated using an ASIC and surface mount technology, and operates with a DC power supply. Its response speed (both 0.1ms and 1ms) can detect small and high-speed moving objects. Change the polarity of the power supply to switch between bright and dark, and set the self-diagnosis stable working area indicator. It has two output modes of voltage and current, which can prevent mutual interference and is very convenient in system installation.
The power supply built-in type integrates an amplifier, a sensor and a power supply unit, and is fabricated by an ASIC and a surface mount process. It generally uses an AC power supply and is suitable for replacing contact-type travel switches at the production site and can be used directly in high-power control circuits. You can also set the self-diagnosis stable working area indicator. The output is equipped with SSR solid state relay or relay normally open and normally closed contacts to prevent mutual interference and can be installed tightly in the system.