An item monitoring system including a bladder including a body with a hollow interior configured to be filled with a fluid is described. The system includes an energy generation mechanism connected to the bladder and including a tube equipped with a wire core or surrounded by a wire coil in fluid communication with the bladder, and a magnetic item movably disposed within the tube. The system includes a light source electrically connected to the energy generation mechanism. Displacement of the fluid from the bladder into the tube moves the magnetic item within the tube, thereby generating an electrical current to emit a light from the light source.

A platform through-beam sensor device includes a transmitter module and a receiver module. A light emitted by a light-emitting element of the transmitter module is shaped into a light pattern range by a transmitter mask. A range of the light received by a light-receiving element of the receiver module is changed to a receiving range by a receiver mask. When the present invention is used, the transmitter module and the receiver module are respectively installed on two ends of a mechanical apparatus that move relative to each other. After determining a safety range of the relative movement of the two ends, a state that the light-receiving element falls into the light pattern range and the light-emitting element falls into the receiving range is set to be within the safety range. Upon exceeding the safety range, a flying platform is controlled to stop, thereby improving the safety of the flying platform.

Disclosed is a non-contact type optical rocker potentiometer, comprising a casing, a rocker and a rocker arm mechanism. The rocker arm mechanism is installed in the casing and is connected with one end of the rocker, and the other end of the rocker extends out of the casing, the rocker arm mechanism is provided with at least two steering output ends, the steering output end is provided with a light blocking part, two sides of the light blocking part are respectively provided with a light emitting element and a photosensitive element which are connected with a PCB board. The potentiometer has the advantages that problems of abrasion, fracture, poor contact accessories easily caused by a contact type potential regulating module are avoided, the stability of the potentiometer is enhanced, and the service life of the potentiometer is prolonged.

A scale for an optically scanning position-measuring device includes a carrier and a reflective layer disposed on the carrier. A transparent spacer layer is disposed on the reflective layer. The spacer layer has a patterned, partially transparent layer thereon which defines a bright/dark pattern in which regions having the partially transparent layer appear dark and regions without the partially transparent layer appear bright. A sealing layer is disposed on the patterned, partially transparent layer. Products of refractive index and layer thickness are the same for the spacer layer and the sealing layer, or differ by an odd multiple.

A device comprises a fixed element, a mobile element, a physical measurement sensor secured to the mobile element and a link allowing a transmission of information between the sensor and the fixed element, the sensor generating a primary signal representative of the physical measurement. The device further comprises a converter of the primary signal into a light signal. The converter is secured to the mobile element. The link is an optical path. The light signal is propagated freely between the fixed element and the mobile element along the optical path. The sensor comprises a power supply module receiving energy from the fixed element without contact.

A method for manufacturing an optical-fibre sensor device is provided, including an enclosure defining a recess and an optical-fibre sensor including an optical-fibre and a device for holding the sensor that is rigidly connected to the optical fibre, the optical fibre passing through the holding device between two attachment points provided on the holding device. The method comprises the steps of: positioning the optical-fibre sensor in the enclosure to pass the fibre through two passage openings provided on the enclosure, the optical fibre generally extending along a longitudinal axis in the recess, which defines two optical-fibre portions in the enclosure, on either side of the holding device, each fibre portion extending between one of the points for attachment of the holding device and one of the passage openings in the enclosure, substantially in a straight line; holding the optical-fibre sensor in position; performing a differential elongation of the enclosure relative to the optical-fibre sensor in the longitudinal direction, and towards the outside of the enclosure, while the optical-fibre sensor remains held in position; attaching the optical fibre to the enclosure at the passage openings.

An auxiliary device for facilitating the installation of a sensing device and a method therefor are disclosed, and the installation support device includes a main body, a first light source assembly and a second light source assembly. The main body has a clamping mechanism configured for mounting the main body onto the sensing device, the first light source assembly and the second light source assembly are disposed on the main body and has at least one solid state light source, and the first light source assembly projects a first pattern along a first projecting direction, and the second light source assembly projects a second pattern along a second projecting direction. The two projecting directions are crossed each other at a predetermined distance, and whether the sensing device is installed at a desired position is determined according to a relative position between the first pattern and the second pattern.

An optical sensor (100) comprises: a holding sleeve (11); a fixed ferrule (12) fixedly mounted in said holding sleeve (11); a movable ferrule (13) movably mounted in said holding sleeve (11), a predetermined distance existing between a first movable end of said movable ferrule (13) and a first fixed end of said fixed ferrule (12) in said holding sleeve (11); a reflection part (14) arranged at a second movable end of said movable ferrule (13) opposite to said first movable end, for reflecting light entering the movable ferrule (13); and an actuation part (15), said actuation part (15) being constructed to drive said movable ferrule (13) to move so that said first movable end moves towards said first fixed end. An optical sensor assembly and a monitoring device comprising the optical sensor (100), or another sensor (1012) can remotely detect a mechanical movement in a passive mode. A first reflector (14, 1016) is configured to provide a first reflected optical signal. The sensor (100, 1012) is connected to the first reflector and has a first position and a second position, the second position configured to attenuate the first reflected optical signal more than the first position. The sensor is configured to move between the first and second positions in response to a monitored parameter (1018).

An optical sensor (100) comprises: a holding sleeve (11); a fixed ferrule (12) fixedly mounted in said holding sleeve (11); a movable ferrule (13) movably mounted in said holding sleeve (11), a predetermined distance existing between a first movable end of said movable ferrule (13) and a first fixed end of said fixed ferrule (12) in said holding sleeve (11); a reflection part (14) arranged at a second movable end of said movable ferrule (13) opposite to said first movable end, for reflecting light entering the movable ferrule (13); and an actuation part (15), said actuation part (15) being constructed to drive said movable ferrule (13) to move so that said first movable end moves towards said first fixed end. An optical sensor assembly and a monitoring device comprising the optical sensor (100), or another sensor (1012) can remotely detect a mechanical movement in a passive mode. A first reflector (14, 1016) is configured to provide a first reflected optical signal. The sensor (100, 1012) is connected to the first reflector and has a first position and a second position, the second position configured to attenuate the first reflected optical signal more than the first position. The sensor is configured to move between the first and second positions in response to a monitored parameter (1018).

A scale for an optically scanning position-measuring device includes a carrier and a reflective layer disposed on the carrier. A transparent spacer layer is disposed on the reflective layer. The spacer layer has a patterned, partially transparent layer thereon which defines a bright/dark pattern in which regions having the partially transparent layer appear dark and regions without the partially transparent layer appear bright. A sealing layer is disposed on the patterned, partially transparent layer. Products of refractive index and layer thickness are the same for the spacer layer and the sealing layer, or differ by an odd multiple.