Abstract:
A movable-body-speed-detecting apparatus includes a movable body capable of moving linearly and/or circularly, a plate fixed to the movable body, the plate having a predetermined length in a direction in which the movable body moves, and light emission/reception means arranged such that light output from a light-emitting element enters a light-receiving element. The plate has a window section that passes between the light-emitting element and the light-receiving element in accordance with movement of the movable body and that blocks or allows passage of light to the light-receiving element. The apparatus further comprises speed calculation means for calculating the speed of the movable body by converting the amount of light received by the light-receiving element into a signal and measuring the signal.
Abstract:
A speed sensing device for use with a traction device is disclosed. The speed sensing device has a rotor having a first rotational, wherein the rotor has magnets affixed thereon to generate a magnetic field. The speed sensing device also has a power-harvesting circuit coupled with the rotor to convert fluctuations in the magnetic field into electrical energy. The speed sensing device further has a sensor having a second rotational speed different from the first rotational speed, wherein the sensor is powered by the power-harvesting circuit to generate a signal indicative of a speed of the traction device. The speed sensing device still further has a transmitting circuit connected with the speed sensor and powered by the power-harvesting circuit to wirelessly transmit the generated signal.
Abstract:
The invention relates to a speed measurement device (1, 2) for a permanently excited electric synchronous machine (5, 7) comprising a first part (11, 13) and a second part (15, 17). The invention also relates to a corresponding method for measuring speed. The second part (15, 17) of the permanently excited electric synchronous machine comprises permanent magnets (19). The speed measurement device (1, 2) comprises at least one first sensor (25) and a second sensor (31), wherein the first sensor (25) is provided with a sensor coil and the second sensor (31) is a Hall sensor and the sensors (25, 31) on the first part (11, 13) are arranged in such a way that the first sensor (25) and second sensor (31) are influenced by a magnetic field (33), which is generated by the permanent magnets (19), by means of a flow conducting device (43) having an integrated character.
Abstract:
An improved escalator 10 which incorporates a device 58 which monitors the speed of an escalator handrail 12. The escalator having a handrail and a transmission unit 14. The device cooperates with a portion of the transmission unit that moves at the same speed as the handrail. Various details are developed which facilitate the monitoring of the handrail speed. In one detailed embodiment, the device includes a plurality of targets 60 and a sensor 62 which is not interfered with by the handrail.
Abstract:
A motion transducer includes a rotatable wheel, a drive assembly that engages a movable rod in contact with the circumference of the rotatable wheel, and an encoder that measures the rotation of the rotatable wheel and that encodes information relating to the rotation of the rotatable wheel. Linear motion of the movable rod causes rotation of the rotatable wheel, the angular displacement of the rotatable wheel being proportional to the linear travel of the rod.
Abstract:
The turns of an optical fiber paid out from a canistor are counted, and the signature of the optical fiber is measured, by monitoring the electromagnetic field of the charge on the optical fiber as it moves past an antenna. The optical fiber follows a helical path as it is paid out. A stationary antenna located transversely proximate the payout region detects a periodic repeating variation of the bound and/or free electrical charge associated with the optical fiber, as the optical fiber periodically moves closer to and farther from the antenna along the helical path. Each period of the variation corresponds to one turn of optical fiber paid out from the canister.
Abstract:
The method of the present invention utilizes a microcomputer in combination with a CRT and a multiplicity of transducers for monitoring process parameters in the operation of a reciprocating device having a linear stroke. A profile of the process parameters including pressure and velocity are generated as a function of stroke length and time and are stored in a non-volatile memory and graphically displayed on the CRT as master traces for comparison with current data profiles. The velocity is calculated by dividing distance transversed with time or by use of a velocity position transducer.
Abstract:
A method of measuring feeding velocity of a web, on which a scale having pitches different from pitches of a mask are formed, is provided. The method includes: calculating a number of vibrations of a moiré image of light passing through the mask and the scale; calculating pitches of the scale of the fed web based on the calculated number of vibrations of the moiré image; averaging the pitches of the scale so that a change in a pitch between adjacent timings among the calculated pitches of the scale is minimized; extracting first signals corresponding to our phases for one pitch based on the averaged pitches of the scale; calculating two second signals for forming a Lissajous circle from the first signals; and calculating an angle of the Lissajous circle by the two second signals and then calculating the feeding velocity of the web by using the calculated angle.