German RED ANT sensor RED ANT model RED ANT price

RED ANT sensors are the direct source of information for the entire machine vision system, mainly consisting of one or two image sensors, sometimes accompanied by light projectors and other auxiliary equipment. The main function of a vision sensor is to acquire the rawest images sufficient for the machine vision system to process. Image sensors can use laser scanners, linear and area array CCD cameras or TV cameras, as well as newly emerging digital cameras.

RED ANT 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 beam usually comes from semiconductor light sources such as light-emitting diodes (LED), laser diodes, and infrared emitting diodes. The beam is emitted continuously or with modulated pulse width. 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, structural components of photoelectric switches include emitter plates and optical fibers.

RED ANT sensor classification

1) Slot-type photoelectric sensor: A slot-type photoelectric switch 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 receiver can receive the light when unobstructed. However, when the detected object passes through the slot, the light is blocked, causing the photoelectric switch to actuate and output a switching control signal to cut off or connect the load current, thereby completing a control action. Due to limitations of the overall structure, the sensing distance of slot switches is generally only a few centimeters. 2) Through-beam photoelectric sensor: Separating the emitter and receiver increases the sensing distance. An emitter and a receiver form a through-beam separated photoelectric switch, referred to as a through-beam photoelectric switch. The sensing distance of through-beam photoelectric switches can reach several meters to tens of meters. When using a through-beam photoelectric switch, the emitter and receiver are installed on opposite sides of the path through which the object passes. When the object passes and blocks the light path, the receiver actuates and outputs 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 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 no longer receives light, the photoelectric switch actuates and outputs a switching control signal. 4) Diffuse-reflective photoelectric switch: The sensing 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 an object passes, it blocks the light and reflects part of it back; the receiver then receives the light signal and outputs a switching signal.

RED ANT 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 highly susceptible to interference from thermal noise and electromagnetic noise generated by lasers, preventing normal operation. Methods of laser weapon attacks on photoelectric sensors on the battlefield mainly include the following: 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 vulnerable to laser attacks, they have become the preferred targets 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 an electricity meter rotates under the torque generated by eddy currents and magnetic fields. Using photoelectric sensors converts the number of rotations of the aluminum disk into pulse counts. For example, by partially blackening a rotating shiny aluminum disk and pairing it with a reflective photoelectric emitter-receiver pair, pulses are generated at the blackened areas as the disk rotates. The rotation count is sampled and converted into corresponding pulse counts, then sent via an optocoupler isolation circuit to the T0 port of the CPU for counting processing. Using optocoupler isolators effectively prevents interference signals from entering the microcomputer. Combined with other transmission methods, this forms an automatic meter reading system. 3) Application of photoelectric sensors in monitoring smoke and dust pollution: A photoelectric sensor is a small electronic device that detects changes in received light intensity, 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 utilize the characteristics of photoelectric sensors to detect smoke and dust conditions, so the strength of the output signal from the photoelectric sensor reflects changes in flue gas turbidity. 4) Hygienic washdown-resistant photoelectric sensors: Washdown-resistant sensors provide extremely high reliability and ease of use while minimizing operating costs. Equipped with IO-Link interfaces and the proTect+ sealing concept, which significantly extends service life, these two new sensors are suitable for demanding application environments and are ideal solutions for the food and beverage industry.

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