49results about How to "Simple detection principle" patented technology

The invention discloses a combination gauge for abnormal bearing inner ring pore detection. The combination gauge comprises a plug gauge and a ring gauge which is used in cooperation with the plug gauge. One end of the plug gauge is a detection end for detecting whether the size of a bearing inner ring pore conforms to the tolerance requirement or not and the other end of the plug gauge is a positioning end used in cooperation with the ring gauge. The position where the ring gauge corresponds to the bearing inner ring pore is provided with a positioning hole which is matched with the positioning end of the plug gauge in an adapted mode. The positioning end of the plug gauge and the positioning hole of the ring gauge are mutually matched and used for detecting whether the position of the bearing inner ring pore conforms to the tolerance requirement. The invention further provides a method for detecting the bearing inner ring pore with the combination gauge. The combination gauge for abnormal bearing inner ring pore detection is simple in structure, capable of effectively detecting whether the size and the position of the bearing inner ring pore conform to the requirements or not and convenient to operate as detection steps are simple. A detection structure can be conveniently and directly obtained through observation.

The invention relates to a vibration sensor based on a surface acoustic wave radio frequency identification technology and application for the vibration sensor. The vibration sensor can be used for identifying the identity of a measured object in a radio frequency manner, and can also be used for monitoring whether the vibration acceleration of the measured object exceeds a set threshold value or not and then recording the vibration acceleration of the measured object; a surface acoustic wave device comprises an antenna, a piezoelectric substrate, an interdigital transducer, reflecting gratings and an elastic element; radixes in the reflecting gratings are used for coding radio frequency tags; the 1-3 reflecting gratings are connected with the elastic element, and then a normally open loop is formed; when the vibration acceleration induced by the vibration sensor exceeds the set threshold value, the reflecting gratings, the elastic element and matched networks jointly form a closed loop; and features of echo signals reflected back to a reader are changed, so that the vibration sensor can alarm after the vibration acceleration in a superthreshold is recorded. Compared with the prior art, the vibration sensor has the characteristics that a measuring method is simple, multidimensional and multi-range measurement can be realized, the vibration sensor is wide in application, and the like.

The invention discloses a non-contact type urban rail vehicle wheel set size on-line detection method. The method includes the following steps: successively arranging a first laser displacement sensorand a second laser displacement sensor on the inner side of a track in a train forwarding direction and successively arranging a fourth laser displacement sensor and a third laser displacement sensoron the outer side of the track, the first and fourth laser displacement sensors being symmetrical about the track and the second laser displacement sensor and the third laser displacement sensor being symmetrical about the track; carrying out coordinate rotation and transverse plane and feature point extraction on two-dimensional data points collected by the laser displacement sensors, and obtaining distances between the laser displacement sensors and a tread side of a vehicle wheel when the circle center of the vehicle wheel is in the central lines of the first and second laser displacementsensors and is in the central lines of the third and the fourth laser displacement sensors; solving two sets of diameters according to geometrical relations, and obtaining an average value of the diameter of the vehicle wheel; and obtaining two sets of vehicle wheel tread side contours through data fusion, and obtaining an average value of parameters of the rim of the vehicle wheel. The method hasthe advantages that the structure is simple, the precision is high and the stability is high.