An explosion-proof electronic system. The system comprises a substantially explosion-proof enclosure, a substantially explosion-proof glass window forming a portion of the enclosure, an electrical coil located within the enclosure, an electrical excitation circuit located within the enclosure and connected to the electrical coil, where the excitation circuit is configured to cause the electrical coil to establish a magnetic field that extends through the explosion-proof glass window, and a processor located within the enclosure and coupled to the electrical excitation circuit. The processor is configured to monitor the electrical excitation circuit, determine an electrical inductance of the electrical coil based on monitoring the electrical excitation circuit, identify a fluctuation of the electrical inductance that exceeds a predetermined threshold as a control input, and transmit an output in response to the control input, whereby a human operator can provide the control input by bringing a finger proximate to the explosion-proof glass window.

Disclosed are various embodiments of an infrared proximity sensor package comprising an infrared transmitter die, an infrared receiver die, a housing comprising sidewalls, a first recess, a second recess, a partitioning divider disposed between the first and second recesses, and an overlying shield comprising an infrared-absorbing material. The transmitter die is positioned in the first recess, and the receiver die is positioned within the second recess. The partitioning divider comprises liquid crystal polymer (LCP) such that the partitioning divider and the infrared-absorbing material of the shield cooperate together to substantially attenuate and absorb undesired infrared light that might otherwise become internally-reflected within the housing or incident upon the receiver as a false proximity or object detection signal.

Disclosed are various embodiments of an infrared proximity sensor package comprising an infrared transmitter die, an infrared receiver die, a housing comprising sidewalls, a first recess, a second recess, a partitioning divider disposed between the first and second recesses, and an overlying shield comprising an infrared-absorbing material. The transmitter die is positioned in the first recess, and the receiver die is positioned within the second recess. The partitioning divider comprises liquid crystal polymer (LCP) such that the partitioning divider and the infrared-absorbing material of the shield cooperate together to substantially attenuate and absorb undesired infrared light that might otherwise become internally-reflected within the housing or incident upon the receiver as a false proximity or object detection signal.

A proximity sensor arrangement comprises an optical barrier being placed between a light emitting device and a photo-detector. The light emitting device, the photo-detector and the optical barrier are covered by a cover. The optical barrier is being designed to block light emitted from the light emitting device to the photo-detector and reflected by the cover by means of specular reflection. Furthermore, the optical barrier is being designed to pass the light emitted from the light emitting device to the photo-detector via the cover and scattered on or above a first surface of the cover facing away from the light emitting device and the photo-detector.

A proximity sensor having improved environmental compensation performance and an environmental compensation method in the proximity sensor are disclosed. The environmental compensation method and the proximity sensor advantageously reduce processing time, algorithm operation time, and power consumption by previously setting sensing values before sensing of sensors unlike a typical method in which compensation is carried out by multiplying factors obtained through software. Further, the environmental compensation method and the proximity sensor have an advantage of accurate compensation not only for linearly varying environmental factors but also non-linearly varying environmental factors.

An operation method of a proximity sensor comprises: controlling a light-emitting element by a processing circuit. Such control includes a plurality of light source on and light source off operations. An optical sensor receives light and outputs a sensing signal corresponding to the intensity of the light. The processing circuit computes the sensing signal to produce a sensing result. The plurality of light source on and light source off operations includes a group having two light sources on operations and two light sources off operations. The two light sources on operations in the group or the two light sources off operations in the group are performed consecutively. In this way, the ambient light components of the light source on and off operations may cancel out each other to reduce the ambient light components contained in the sensing results.

Techniques involve a device which includes an energy chain and a sliding table, the energy chain having a plurality of sliding shoes, each having a sliding surface for sliding on the sliding table. The sliding shoes each have a detection element, which is spaced from the corresponding sliding surface by a wearing layer. The sliding table has a sensor for determining the distance (d) between the sensor and the detection elements.

Techniques involve a device which includes an energy chain and a sliding table, the energy chain having a plurality of sliding shoes, each having a sliding surface for sliding on the sliding table. The sliding shoes each have a detection element, which is spaced from the corresponding sliding surface by a wearing layer. The sliding table has a sensor for determining the distance (d) between the sensor and the detection elements.

The present disclosure relates to a concept of proximity detection. A sequence of keystrokes is captured when a person types on a keyboard placed on a support structure. A sequence of vibrations of the support structure in response to typing on the keyboard is captured with a sensor device associated with a user or a location and in contact with the support structure in proximity to the keyboard. The proximity between the person and the sensor device is checked based on a comparison of the captured sequence of keystrokes with the captured sequence of vibrations.

The present disclosure relates to a concept of proximity detection. A sequence of keystrokes is captured when a person types on a keyboard placed on a support structure. A sequence of vibrations of the support structure in response to typing on the keyboard is captured with a sensor device associated with a user or a location and in contact with the support structure in proximity to the keyboard. The proximity between the person and the sensor device is checked based on a comparison of the captured sequence of keystrokes with the captured sequence of vibrations.