44results about How to "Increase the detection area" patented technology

The invention relates to a boulder detection method, which comprises the following steps: putting an ultrasonic probe on a position to be detected through a drill hole, starting a driving device, driving a plurality of ultrasonic transducers in the direction vertical to the hole wall of a detection hole to ensure that the ultrasonic probe is tightly attached to and coupled with the hole wall of the detection hole, then detecting by using ultrasonic waves to obtain the accurate spatial position of a wave-facing surface of a boulder, transmitting data to a control computer through a data line, and generating the three-dimensional spatial position and size of the boulder in proportion. The method for detecting the boulders through the ultrasonic waves can greatly reduce the workload of exposing the boulders in the traditional exploration method, save a large amount of cost, effectively avoid the problems of boulder omission, low accuracy and the like caused by the boulder exploration in the traditional exploration method, improve the working efficiency of boulder exploration, improve the accuracy of boulder exploration and reduce the engineering construction risk.

The invention provides an indium tin oxide / vertical graphene photoelectric detector composite structure and a preparation method thereof and belongs to the technical field of a photoelectric detector.The photoelectric detector comprises the following components from the bottom up in sequence: glass serving as a substrate of the device, vertical graphene serving as an optical absorption layer andan electron transport layer of the device, an ITO (indium tin oxide) thin film serving as a transparent current assisted diffusion layer, and titanium / gold electrodes arranged at the two sides of thevertical graphene and connected to an external power source. Since the vertical graphene has a broadband spectrum response characteristic, the detector operates in bands from the visible light band tothe infrared band; the designed ITO thin film can effectively transfer photo-induced carriers, thereby suppressing defect influence and improving output photocurrent of the device; besides, the detector has high light absorption rate and light response, and can work under a low bias voltage; the process is simple and repeatable; and detection efficiency and rate of finished product of the detector are improved effectively.

The invention provides a miniaturized fixed star tracking optical system capable of achieving whole-day observation. The whole-day miniaturized fixed star tracking optical system comprises an imaging unit, a band-pass fiber, a main reflector, an auxiliary reflector and a scan reflector and a through hole is formed in the center of the main reflector, wherein the imaging unit, the band-pass fiber, the main reflector, the auxiliary reflector and the scan reflector are sequentially arranged along an optical axis of an imaging optical path; incident light sequentially passes through the scan reflector, the main reflector and the auxiliary reflector, is reflected for three times, and then is emitted to the imaging unit through the central through hole of the main reflector and the band-pass filter; a part of an optical path of the incident light coincides with a part of an imaging optical path in the scanning field from 30 degrees to 50 degrees so that the requirement for miniaturization of the system can be satisfied; the main reflector and the auxiliary reflector are respectively provided with a light shield and the edge of the scan reflector perpendicularly extends so that a light shielding board can be formed. Field scanning is conducted through the scan reflector, a zone between the 30-degree airspace and the 80-degree airspace of the zenith can be observed all day, and an instant field of the system is smaller than 30'.