40results about How to "Reduce indicator requirements" patented technology

The invention discloses a low-altitude target monitoring method based on microphone array networking, and belongs to the technical field of low-altitude target monitoring passive positioning. Aiming at the needs of air traffic control blind spots and monitoring non-cooperative targets in sparsely populated remote areas, through a reasonable layout of microphone arrays, multi-sensor data fusion systems, and a low-altitude target monitoring network structured by multi-hop packet wireless networks, it is composed of multiple sensors in the form of spatial arrays A single microphone array, so that each microphone in the array receives the sound wave signal radiated by the aircraft vibrating air, through the adaptive beam processor, using beamforming and other algorithms, using the beam control delay line, changing the direction to control the delay of the delay line, and measuring the target Direction of Arrival; multiple adaptive processors are superimposed to form an adaptive sensor array, so that multiple microphone arrays can be processed by multiple adaptive sensor arrays to obtain multi-target direction of arrival information, and multi-hop packet wireless network to multi-sensor data fusion The system performs information fusion and extracts the track information of the target.

The invention relates to a self-calibrating method of internal reference resistors of a multi-range digital electronic measuring instrument, comprising the following steps of: on the basis of the design line of the traditional digital electronic measuring instrument, additionally setting an electronic switch and a self-calibrating program; setting a resistor with good long-term stability as an internal standard resistor in a set of internal reference resistors; when in a self-calibrating state, controlling the electronic switch by using the self-calibrating program to form different combinations so as to obtain comparing and measuring circuits among different reference resistors; and respectively and directly or indirectly comparing the reference resistors with the set internal standard resistor to measure respective actual resistance values and storing the actual resistance values in an internal storage for automatically correcting measuring results. Because only one standard resistor with good long-term stability needs to be adopted, other reference resistors are compared and calibrated with the standard resistor, and the method effectively reduces the requirements of other reference resistors, is beneficial to reducing the production cost and ensuring the measuring precision of each measuring process so that the calibration in the production process and the periodic calibration of users both are simpler and more effective and accurate.

The invention provides a total internal reflection color-combination prism, which comprises a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a first surface, a second surface, a third surface, a first incident face, a second incident face, a third incident face and an emergent face, wherein the seventh interface and the eighth interface are crossed and vertical to each other; the seventh interface transmits red light and green light and reflects blue light; the eighth interface transmits the blue light and the green light and reflects the red light; the red light incident from the first incident face is transmitted through the first interface and the fourth interface, and transmitted out of the first surface; the green light incident from the first incident face is transmitted through the second interface and the fifth interface, and is transmitted out of the second surface; the blue light incident from the first incident face is transmitted through the third interface and the sixth interface, and is transmitted out of the third surface; the light incident from the first incident face is reflected by the eighth interface and is emergent from the emergent face; light incident from the third surface is reflected by the seventh interface and is emergent from the emergent face; and light incident from the second surface is directly transmitted by the seventh interface and the eighth interface, and is emergent from the emergent face.