German STAB SRL sensors, STAB SRL models, STAB SRL prices

STAB SRL sensors are used to measure the robot's own position. Position sensors can be divided into two types: contact sensors and proximity sensors. They are sensors that can sense the position of the measured object and convert it into a usable output signal. It is a sensor that can sense the position of the measured object and convert it into a usable output signal. Position sensors can be used to detect position and reflect switches in certain states. Unlike displacement sensors, position sensors come in two types: contact and proximity.

STAB SRL sensor principle

Photoelectric sensors achieve control by converting changes in light intensity into changes in electrical signals. Generally, photoelectric sensors consist of three parts: transmitter, receiver, and detection circuit. The transmitter emits a light beam toward the target. The emitted light beam generally comes from semiconductor light sources, such as light-emitting diodes (LED), laser diodes, and infrared emitting diodes. The light beam is emitted continuously, or the pulse width is changed. The receiver consists of photodiodes, phototransistors, and photocells. Optical components such as lenses and apertures are installed in front of the receiver. Behind it is the detection circuit, which filters out valid signals and applies them. In addition, the structural components of photoelectric switches also include emitter plates and optical fibers.

STAB SRL sensor classification

1) Slot-type photoelectric sensor: A slot-type photoelectric sensor is formed by mounting a light emitter and a receiver face-to-face on both sides of a slot. The emitter can emit infrared or visible light, and the light receiver can receive the light when there is no obstruction. However, when the detected object passes through the slot, the light is blocked, the photoelectric switch acts, outputs a switching control signal, cuts off or connects the load current, thereby completing a control action. Due to limitations of the overall structure, the detection distance of slot switches is generally only a few centimeters. 2) Through-beam photoelectric sensor: If the emitter and receiver are separated, the detection distance can be increased. An emitter and a receiver form a through-beam separated photoelectric switch, referred to as a through-beam photoelectric switch. The detection distance of through-beam photoelectric switches can reach several meters or even tens of meters. When using a through-beam photoelectric switch, the emitter and receiver are installed on both sides of the path through which the detected object passes. When the detected object passes, it blocks the light path, and the receiver acts to output a switching control signal. 3) Retro-reflective photoelectric switch: The emitter and receiver are housed in the same unit, with a reflector plate installed in front. It utilizes the reflection principle to perform photoelectric control, known as a retro-reflective (or mirror-reflective) photoelectric switch. Under normal conditions, the light source emitted by the emitter is reflected back by the reflector plate and received by the receiver; once the detected object blocks the light path and the receiver does not receive light, the photoelectric switch acts and outputs a switching control signal. 4) Diffuse-reflective photoelectric switch: The detection head of a diffuse-reflective photoelectric switch also contains an emitter and a receiver, but there is no reflector plate in front. Under normal conditions, the receiver cannot detect the light emitted by the emitter. During detection, when the detected object passes, it blocks the light and partially reflects it back. The receiver then receives the light signal and outputs a switching signal.

STAB SRL sensor application cases

1) Application of photoelectric sensors in laser weapons: Since photoelectric sensors are particularly sensitive to infrared radiation, visible light, or both, they are more likely to become targets of laser attacks. In addition, electronic systems and the sensors themselves are extremely susceptible to interference from thermal noise and electromagnetic noise generated by lasers, preventing normal operation. The main ways laser weapons attack photoelectric sensors on the battlefield include: using a laser beam of appropriate energy to "blind" the sensor, making it unable to detect or continue tracking already detected targets. Or, if the sensor is guiding a weapon toward a target, blinding will cause it to lose the target. In summary, since sensors play an increasingly important role on the battlefield and are easily subject to laser attacks, they have become the preferred target for low-energy laser weapons. 2) Application of photoelectric sensors in automatic meter reading systems: With the development of microelectronics, sensor technology, computer technology, and modern communication technology, photoelectric sensors can be used to develop automatic meter reading systems. The aluminum disk of the electricity meter rotates driven by torque generated under the action of eddy currents and magnetic fields. Using photoelectric sensors, the number of rotations of the aluminum disk can be converted into pulse counts. For example, by locally blackening a part of the rotating shiny aluminum disk and pairing it with a reflective photoelectric emitter-receiver pair, pulses are generated at the blackened areas when the aluminum disk rotates. The number of rotations of the aluminum disk is sampled and converted into corresponding pulse counts, and sent via an optocoupler isolation circuit to the T0 port of the CPU for counting processing. Using optocoupler isolators can effectively prevent interference signals from entering the microcomputer. Combined with other transmission methods, an automatic meter reading system can be formed. 3) Application of photoelectric sensors in monitoring smoke and dust pollution: A photoelectric sensor is a small electronic device that can detect changes in the intensity of received light, achieving control functions by converting changes in light intensity into changes in electrical signals. Due to characteristics such as non-contact operation, fast response, and reliable performance, photoelectric sensors are widely used in industrial automation devices and robots. We can use the characteristics of photoelectric sensors to detect smoke and dust conditions, so the strength of the output signal from the photoelectric sensor can reflect changes in flue gas turbidity. 4) Hygienic washdown-proof photoelectric sensors: Washdown-proof sensors provide extremely high reliability and comfort while minimizing operating costs. Equipped with IO-Link interfaces and the proTect+ sealing concept that significantly extends service life, these two new sensors are suitable for harsh application environments and are an ideal solution for the food and beverage industry.

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