31results about How to "Facilitate signal acquisition" patented technology

The invention relates to a sensor module for monitoring bearings in steel industry applications comprising an embedded portion (12a) for being fitted into a hole (22) in a bearing component (10) of the bearing to be monitored, wherein the embedded portion (12a) comprises at least one sensor (34a, 34b, 36, 38). It is proposed that the embedded portion (12a) further comprises a clamping mechanism (30) generating clamping force acting on at least two opposing lateral internal faces of the hole (22).

The invention discloses a digital passive infrared static human body detector which comprises an outer shell, a microcontroller and a PIR sensor and is characterized in that a Fresnel lens is arranged at the front end of the PIR sensor, a matched reflector is installed between the PIR sensor and the Fresnel lens, and the microcontroller is connected with a power source module, a drive motor and a detection switch. A detection method includes: a, background noise is learned, and a background noise sequence is formed; b, dynamic human body detection is carried out; c, delayed output is carried out; d, static detection is judged whether to be carried out or not; e, detection signals are acquired, and a detection signal sequence is formed; f, the digital mutual correlation calculation is carried out; and g, a static human body is judged whether to exist or not. According to the detector and the method, false assumption of a prior passive static human body detector and the defect that the human body under the static state can not be detected are abandoned and avoided, and the human body under the static state in a detection area can be effectively and accurately detected so that the static detection is achieved.

The invention relates to a biomedical electrode, in particular to a biomedical electrode with a surface micro-structure array and a manufacturing method thereof. The biomedical electrode with the surface micro-structure array characteristic comprises a metal electrode core, a foam materiel back lining and a shielded conductor; the manufacturing method of the biomedical electrode comprises the steps as follows: sheet metal serves as the raw material of the metal electrode core, a laser micro-processing technology is adopted to form a micro-structure array with the longitudinal distance of 0.1-0.3 mm and the transverse distance of 0.1-0.3 mm on the metal electrode core, cleaning and drying are performed, then hydrochloric acid is utilized to remove an oxidizing layer and impurities, alcohol is utilized for cleaning, and a Au or Ag / AgCl thin layer is plated on the surface of the metal electrode core; the metal electrode core is stuck to the surface of the foam materiel back lining by glue; the shielded conductor penetrates through the foam materiel back lining, and is connected to the surface of the metal electrode core with the method of filling conductive silver adhesive, and solderless connection of the metal electrode core with the shielded conductor can be formed after the conductive silver adhesive is solidified, so that the biomedical electrode with the surface micro-structure array is obtained.

The invention discloses a shock monitoring and positioning method based on two-dimensional beam focusing theory, which specifically includes the following steps: step 1, using a piezoelectric sensor to monitor the signal when the structure is struck, and using a data acquisition card to collect the shock signal Send it to the host computer, perform Fourier transform on the impact signal in the host computer to obtain the signal spectrum, select the frequency peak of the spectrum as the center frequency to perform wavelet analysis on the signal, obtain the time domain signal corresponding to the center frequency, and analyze the obtained time domain Signal envelope; step 2, use the two-dimensional beam focusing positioning method to find the location of the impact point, and determine whether it is in the outer field; step 3, if the positioning coordinates are not in the outer field, consider that the positioning result is located in the inner field two-dimensional beam focusing positioning In the blind area of ​​the method, the positioning coordinates (a, b) are recalculated and output as the final positioning result. The invention solves the problems of positioning blind area and relatively low positioning accuracy existing in the existing one-dimensional beam focusing positioning.