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 belongs to the technical field of analysis and detection, and particularly provides a detection method of biomolecules and inhibitor molecules. The detection method of biomolecules and inhibitor molecules comprises the following steps: mixing an object to be detected with a viscous solution or hydrogel to form a mixed solution, placing the mixed solution at one end of an indicating test strip, and enabling different quantities of target detection objects to cause different hydrolysis degrees of the viscous solution or the hydrogel, so that the contents of water released by the viscous solution or the hydrogel through decomposition are different, the pH sensor can move on the pH test strip at different distances, and the target detection object can be detected according to the length of the moving distance. The problems that a common biomolecule detection method in the prior art is tedious in operation steps, needs to train professionals to operate related equipment, is long in detection time and low in efficiency, causes resource waste and cost increase, and influences the detection sensitivity due to environment background factors such as matrixes exist are solved.

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 method for measurement of two-phase flow gas holdup based on an ultrasonic two-frequency signal. The method comprises the steps of: arranging an ultrasonic transmitting probe and an ultrasonic receiving probe respectively at both ends of a section of straight pipeline needing two-phase flow gas holdup measurement; by means of the ultrasonic transmitting probe, generating two ultrasonic signals that are propagated along the fluid in the straight pipeline and have the excitation frequencies of a first excitation frequency and a second excitation frequency respectively; detecting the characteristic parameters of the received two ultrasonic signals by the ultrasonic receiving probe; and calculating the gas holdup according to the first excitation frequency, the second excitation frequency, the pure liquid propagation velocity, the resonant frequency of bubbles in the two-phase flow, the bubble vibration damping and the characteristic parameters of the two ultrasonic signals. The ultrasonic probes are installed on the outer wall of the straight pipeline, and are not needed to be arranged in the two-phase flow in the pipeline, thus realizing non-contact measurement of the two-phase flow gas holdup. The data processing amount is very small, and flow of the two-phase flow in the pipeline is not hindered in the measurement process.

The invention discloses a method and a device for detecting the forming evenness of a recombinant material slab. The device consists of an air blowing part, a detection part and a marking part. Compressed air is blast into the recombinant material slab which is transferred forward, a wind speed sensor is used to detect the wind speed difference at different positions, and a marker is spray-coatedat the position where the wind speed has obvious change. The device for detecting the recombinant material slab can be used with a recombinant material slab forming machine and slab processing equipment by matching. The method and the device for detecting the recombinant material slab have the advantages that: (1) the method and the device can finish the detection and marking on production lines,and have a simple process; and (2) the method and the device have a simple detection principle and reliable equipment, and can effectively solve the problem of uneven slab forming.

The invention belongs to the field of intelligent recording and broadcasting systems, and relates to a method for detecting and locating standing human faces in an intelligent recording and broadcasting system. value, and then perform morphological operations on the image, mark the active area and retain it with the smallest circumscribed rectangle, and perform light compensation on it, and then filter out the interfering active area through skin color detection, and classify it according to the proportion of the face area Screening and exclusion of skin-colored but no-face areas, and finally data analysis based on the processed data to mark faces. This method is ingenious in design, simple in detection principle, easy to operate and use, and can complete standing with only one camera. Face detection and positioning, low equipment requirements, high accuracy of detection results, friendly application environment, and broad market prospects.

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.

The invention discloses a spring operating mechanism detection device comprising a test support. One end of the test support is provided with an arc-extinguishing component via an arc-extinguishing chamber fixing rod box. The other end of the test support is provided with a tested spring operating mechanism. The arc-extinguishing component and the tested spring operating mechanism are connected via a connecting mechanism. The test support is also provided with a test mechanism used for detecting the tested spring operating mechanism. The spring operating mechanism to be detected and the arc-extinguishing component of a circuit breaker are matched through circuit connection so that simulation of the real use state of the high-voltage circuit breaker can be realized, one-to-one detection can be realized, the overall product performance of the finished high-voltage circuit breaker can be fully guaranteed, yield rate of the product can be enhanced and repair rate and quality accidents of the product can be reduced.