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The following proximity switches can be supply:
Optoelectronic detection systems generally consist of a transmitter and a receiver with a downstream signal converter.
The transmitter component is a GaAS diode, which emits clocked infrared light at approx. 900 nm with a clock frequency of approx. 1.5 kHz. On the receiver side, a uniform light compensation ensures a corresponding interference immunity against extraneous light.
The light emitted by the transmitter enters the receiver directly or via reflection.
Depending on the type of detection of the object, two different functional locations are distinguished within the system: reflex sensors (light sensors) and light barriers.
The following proximity switches can be supply:
Signal acquisition with the SPECTRO-3 is very flexible. The sensor can be operated e.B. in alternating light mode (AC mode). Here, the sensor is independent against extraneous light. Dc mode can also be set. Here the sensor is extremely fast. A scanning frequency of up to 35KHz is achieved. An OFF function switches off the integrated light source on the sensor and switches to DC mode, then the sensor can detect so-called "self-illuminators". In PULSE mode, extremely dark surfaces can be reliably detected. The infinitely variable adjustment of the integrated light source as well as a selectable amplification of the receiver signal and an INTEGRAL function enable the sensor to be adjusted to almost any surface or "self-illuminator". If the integrated illumination of the SPECTRO-3 color sensor is activated, the sensor detects the diffusely reflected back radiation on the measuring object. A white light LED with adjustable transmission power is used as the light source on the SPECTRO-3 color sensor. As a receiver, an integrated 3-fold receiver is used for the red, green and blue portion of the light reflected back by the measuring object, or the light emitted by the "self-illuminator". A special feature here, as already mentioned above, is that the gain of the receiver can be set in 8 stages. This makes it possible to optimally adjust the sensor to almost any surface as well as to different "self-luminaires". Up to 31 colors can be "taught" to the SPECTRO-3 color sensor. Tolerances can be assigned for each learned colour. In X/Y INT or s/i M mode, the tolerances represent a color cylinder in the room. In X/Y/INT or s/i/M mode, the tolerance represents a color sphere in space. The color evaluation according to s/i M is based on the Lab calculation method. All modes can be used in conjunction with several operating modes, including "FIRST HIT" and "BEST HIT". The raw data is displayed with a 12 bit resolution. The color recognition either works continuously or it is started by an external PLC trigger signal. The detected color is either a binary code on the 5 digital outputs or can be output directly to the outputs if only up to 5 colors are to be recognized.
Parameters and measured values can be exchanged between the PC and the SPECTRO-3 color sensor via the RS232 interface. All parameters for color recognition can be stored via the rs232 serial interface in the non-volatile EEPROM of the SPECTRO-3 color sensor. After parameterization, the color sensor continues to work in STAND-ALONE mode with the current parameters without a PC. The sensors of the SPECTRO-3 series can be calibrated (white light balance). The adjustment can be made to any white surface. Alternatively, a ColorCheckerTM table is available. This has 24 color fields according to the CIE-NORM. The white light balance or calibration can be done on one of the white fields.
