| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073862324 | Using a light sensor | 8 |
| 20090288499 | Torque measurement device and program - [Problems] To provide a torque measurement device capable of more accurately specifying positions of reflectors which are attached to a rotating body, and more accurately obtaining a torque of the rotating body. | 11-26-2009 |
| 20110197683 | NON-CONTACT TORQUE DETERMINATION SYSTEM AND METHOD FOR A NON-MECHANICALLY COUPLED ROTATING SYSTEM - Methods and apparatus are provided for determining torque in an environmentally isolated system. A drive system is coupled to the environmentally isolated system via a non-contact, magnetic coupling that has a known angular stiffness and at least two coupling sections. A relative deflection of each coupling section is optically measured, and the torque is determined based on the relative deflection and the known angular stiffness. | 08-18-2011 |
| 20110209563 | TORQUE MEASUREMENT - A strain sensor apparatus for a rotatable shaft including a radiation emitter/receiver, a vibration element attached to the shaft and a reflector that is positioned to reflect radiation onto the vibration element. | 09-01-2011 |
| 20110219887 | STRAIN MEASUREMENT OF ROTATING COMPONENTS - A strain sensor apparatus for a rotatable shaft including a radiation emitter/receiver, a vibration element attached to the shaft and a radiation-reflective annulus surrounding the shaft and vibration element. | 09-15-2011 |
| 20130298697 | Pressure isolated fiber optic torque sensor - Fabry-Perot and Bragg grating optical measuring principles are combined with a torsional stress sensing mechanism that converts torque applied in one fluid environment to force exerted in a second environment to measure extreme environmental parameters such as pressure in a petroleum producing borehole. | 11-14-2013 |
| 20140311258 | OPTICAL SENSOR, METHOD FOR MANUFACTURING OPTICAL SENSOR, OPTICAL ENCODER, TORQUE DETECTION APPARATUS, AND ELECTRIC POWER STEERING APPARATUS - An optical sensor, an optical encoder, a torque detection apparatus, and an electric power steering apparatus less affected by fluctuations in the amount of detected light and with an improved resolution are provided. The optical sensor includes a first polarizing layer that splits incident light to light with a first polarization direction, a first photoreceiver that receives first polarized light split by the first polarizing layer, a second polarizing layer that splits the incident light to light with a second polarization direction, and a second photoreceiver that receives second polarized light split by the second polarizing layer. The first photoreceiver and the second photoreceiver are positioned alternatingly and spaced uniformly with each other. | 10-23-2014 |
| 20160116353 | Elastic Torque Sensor For Planar Torsion Spring - An elastic torque sensor utilizing a torsion spring and components to measure the movement of the spring output side and input side. The torque sensor is in communication with a programmable controller. The components detecting movement or distortion of the either side of the torsion spring are not positioned within the load path experienced by the torsion spring. This configuration allows the detected position of the spring input and output sides not to be distorted by hysteresis. The components comprise a sensor disk that is attached to either the spring input or output side. The sensor disk is not within the spring load path. The sensor disk rotates with the torsion spring. The sensor disk is mark so that the degree of rotation can be detected by a stationary sensor also not in the load path. The sensor disk can send a signal to a programmable controller. | 04-28-2016 |
| 20160187211 | HOIST MAIN SHAFT TORQUE MONITORING DEVICE BASED ON ANGLE MEASUREMENT - A hoist main shaft torque monitoring device based on angle measurement, constituted primarily by a first base, a second base, a light generating unit, a shutter, and a light sensing element; the light source, a first lens, and a first optical aperture arranged in the light generating unit, as well as a second optical aperture, second lens, and light sensing element on the shutter, forming a light source generation, propagation, and reception pathway; when the elevator main shaft is subjected to a certain torque, a corresponding displacement is produced between the first optical aperture and the second optical aperture, thus measuring the change in amount of light ultimately reaching the second optical aperture so as to measure the twist angle of the rotary shaft and finally calculate the magnitude of the shaft torque. Without damaging the original equipment and foundation, the device measures the torque of the shaft at different rotational speeds. The device can measure stationary torque and torque at different rotational speeds of the shaft, without the electromagnetic field interfering with wireless transmission; the device is easy to use, maintenance costs are low, and it is of interest for widespread popularization. | 06-30-2016 |
