A circuit for a smart lock includes a state detection unit, a main control chip and a motor driving unit, the state detection unit includes optocoupler sensors U21, U31 and a Hall sensor; the optocoupler sensor U21 is configured to form a first in-position signal, the optocoupler sensor U31 is configured to form a second in-position signal, the Hall sensor is configured to detect whether the state of the lock body is unlocked in position so as to form an auxiliary signal; the main control chip is configured to output a control signal according to the first and second in-position signals and the auxiliary signal; and the motor driving unit is configured to drive the motor to rotate forward or reverse or stop rotating according to the control signal.

A position sensor employing silicon photodiodes formed from trapezoidal chips mounted on a printed circuit board detects angular positions of a rotor shaft within a galvanometer-based optical scanner.

A sensor device (2) is removably attachable to a drug delivery device (12). The sensor device comprises an array (20) of optical sensors arranged within the sensor device such that, when the sensor device is attached to the drug delivery device, the drug delivery device having a first movable element (14) which is configured to move along a path parallel to the longitudinal axis of the drug delivery device, each optical sensor is operable to detect light received at different locations along the linear path and to output a signal indicative of an amount of detected light; and circuitry (21) configured to receive the signals output from the optical sensors and, based on the received signals, to determine information associated with a location along the path of the first movable element.

An electronic lock with an electronic sensing arrangement to accurately sense relative positions of a bolt which mechanically locks a door, such as a door of an electronic drop safe, and to also sense an electronically controlled plunger which locks the bolt in place. The arrangement provides a mechanism for sensing a variety of mechanical malfunctions, as well as, potential fraud or tampering situations.

There is provided a surface texture measuring apparatus in which a measurement device is replaced easily and safely. A measurement device is replaceable by attaching and detaching the measurement device to and from a drive mechanism part. The measurement device includes a bracket, and the bracket includes a first connector for transmitting and receiving a signal to and from the measurement device and feeding to the measurement device. The drive mechanism part includes a support frame to which the bracket is detachably attached, and the support frame includes a second connector electrically connected to the first connector. The signal is transmitted and received between the first connector and the second connector, and the first connector is fed from the second connector while the first connector and the second connector are connected. Insertion and removal between the first connector and the second connector to attach and detach the measurement device to and from the drive mechanism part is hot swappable.

A position sensor employing silicon photodiodes formed from trapezoidal chips mounted on a printed circuit board detects angular positions of a rotor shaft within a galvanometer-based optical scanner.

A system for determining a door condition includes a hinge including a first portion coupled with a door and a second portion coupled with a vehicle frame and rotatably coupled with the first portion. The system further includes a sensor outputting a signal related to a position of the first portion relative to the second portion and a controller receiving the signal and determining whether the signal corresponds to a door closed condition or a door open condition.

A light detecting element for detecting rotations of a wheel is provided. The light detecting element includes a circuit board and an optical transceiver component. The circuit board has a first conductive layer and a first insulation layer. The first conductive layer has a first heat dissipation region, and the first insulation layer covers the first conductive layer and exposes the first heat dissipation region. The optical transceiver component is disposed on the first heat dissipation region and electrically connected to the circuit board. The optical transceiver component includes a light emitter and a light receiver, the light emitter is adapted to emit a light signal to the wheel, and the light receiver is adapted to receive the light signal reflected from the wheel. The invention further provides a projection apparatus having the light detecting element.

An optical system may include a light source to provide a beam of light. The optical system may include a reflector to receive and redirect the beam of light. The optical system may include a light gate having an opening to permit the beam of light, from the reflector, to travel through the opening. The optical system may include a light sensor to receive a portion of the beam of light after the beam of light travels through the opening, and convert the portion of the beam of light to a signal. The optical system may include a processing device to determine whether a notch of a wafer is in an allowable position based on the signal.

A larvae counter comprising a first container for receiving water, eggs of insects and/or larvae, a second container in fluid communication with the first container for receiving water and larvae from the first container, and a larvae counting module in fluid communication with the second container for receiving water and larvae from the second container and counting the larvae.