LHI 968

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LHI 968 Application Field and Working Principle

The LHI 968 belongs to the motion sensors category and more specifically, optical sensors. It is a low-cost, single-element infrared proximity and motion detector which is ideal for use in manufacturing, robotics, and other control applications. The sensitive element of the LHI 968 is an infrared light emitting diode (LED) and a phototransistor/photodiode integrated into a miniature plastic package. By utilizing time of flight (TOF) technology, the LHI 968 provides reliable sensing in contactless applications even where there is ambient noise or interference from other infrared sources.

Applications of LHI 968

The LHI 968 is often used in robotic motion and object detection systems. It provides an easy and reliable way to establish distance measurement between the sensor and its object, the reflective surface or moving target. This type of motion detection is commonly used in manufacturing, as well as automated material handling systems. In addition, the LHI 968 is also used in security-related applications such as intrusion and motion detection in home and office settings.

Working Principles of LHI 968

The detector portion of the LHI 968 comprises three parts: the infrared LED, the light receiver and the circuitry to drive the detector. The infrared LED emits an infrared light pulse which is received by the light receiver and recorded by the circuitry. The detector will generate a signal when the received light pulse is higher than the set threshold. The threshold is set to detect the difference between the background noise and the signal. The working range of the LHI 968 depends on the desired objects and its position. It can detect objects at distances up to 40 cm in normal lighting conditions.

The output of the LHI 968 is normally an analog voltage which represents the distance between the sensed object and the sensor. The analog voltage output varies depending on the situation and the surrounding environment. The output voltage can also be used to calculate the time of flight travel time of the infrared light pulses which helps to determine the distance of the object from the detector. This feature provides enhanced accuracy when measuring distances.

In addition to the distance measurement, the LHI 968 also provides a motion alarm output. This feature allows the LHI 968 to detect motion in its detection area. When motion is detected, the output will reflect the presence of movement in the area. This is useful in security applications where objects need to be monitored for movement.

Conclusion

The LHI 968 is a low-cost and highly-efficient motion sensor that is designed for a wide range of applications. It is a single-element optical sensor with a sensitive infrared LED and light receiver integrated in a miniature plastic package. The detector outputs an analog voltage to represent the distance between the sensed object and the sensor. It also provides an alarm output to detect motion in its detection area. The LHI 968 is an ideal choice for robotic motion and object detection applications, material handling, and security-related applications.

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