49results about How to "Avoid detection bias" patented technology

There is described an image-reading apparatus to acquire image data by reading a scanned image comprising an image sensor having a light emitting means and a photo receiving means for receiving a light emitted from the light emitting means, and a reading control means for controlling the image sensor. The photo receiving means separately acquires light amount data in a plurality of wavelength regions, and the reading control means independently controls a start and a stop of each of light receiving operations of the photo receiving means conducted in the plurality of wavelength regions. Further, there is also described an image-reading apparatus to acquire image data by reading a scanned image comprising an image sensor having a plurality of light emitting means, light emitting wavelength regions of which are different from each other, and photo receiving means for receiving light emitted from the plurality of light emitting means, and a reading control means for controlling the image sensor, and the reading control means independently controls a start and a stop of each of light emitting operations conducted by the plurality of light emitting means.

The invention discloses a system for measuring a three-dimensional volume scattering function of a microparticles in water. The system comprises a parabolic spherical reflector, a sample pool, a telescope group, a photoelectric detector and a computing processing unit, wherein the sample pool is arranged in a reflector cavity of the parabolic spherical reflector, the center position of the sample pool is located in a parabolic spherical focal point of the reflector cavity of the parabolic spherical reflector, incident light is converged at the reflector cavity focal point position, incident to a parabolic spherical surface after being subjected to particle scattering in the sample pool, transformed into parallel scattered light, received by the photoelectric detector after passing through the telescope group, and transmitted to the computing processing unit for processing, and thus, the three-dimensional volume scattering function of the microparticle can be obtained. The invention further discloses a method for measurement by utilizing the system. According to the invention, the problem of detection deviation generated when a plurality of detectors are used for detecting the volume scattering functions of different angles is avoided, the acquired image is good in uniqueness and high in contrast ratio and can be completely fixed in a work process, and the measuring stability is good and the measuring speed is high.

The invention discloses a method for calculating the position and the movement velocity of a vacuum switch contact. The method comprises the following steps of an image acquisition step of acquiring a continuous image of the movement of the vacuum switch contact and an arc; an edge analysis step of analyzing each frame in the continuous image, acquiring the upper edge position and the lower edge position, of the arc in each frame, which are respectively the position of a vacuum switch static contact and the position of a moving contact in the present frame; and a velocity calculating step of calculating the displacement of the moving contact in two adjacent arc motion frames, and calculating the ratio, of the displacement to the frame difference time, which is the movement velocity of the moving contact. Due to the fact that an image analysis technology is employed, when the method provided by the invention is compared with a present method for calculating the position and the movement velocity of a vacuum contact, the precision is greatly improved; and at the same time the employed technology is mature and reliable, and the method is suitable for large-scale popularization and usage.

The invention relates to a fixing device for a mobile Internet 5G general signal detector, comprising a main body and a net cover, brackets are installed on the left and right sides of the main body, and the main body and the bracket are fixedly connected, and the top middle of the main body is fixed There is a turntable, and the main body is closely attached to the turntable. The interior of the turntable is connected with a threaded column, and the left and right ends of the middle part of the turntable are fixed with fixed boxes, and the fixed box and the turntable are closely fitted. The fixing device of the mobile Internet 5G universal signal detector can protect the fixing box externally through the rotation of the guard plate between the fixing column and the fixing box, and can prevent collision accidents between the fixing box and the main body, and can The signal detector is placed in various environments, so that fixed detection can be performed according to the working environment of the mobile Internet 5G device, and internal damage to the main body can be prevented, and the detection effect of the signal detector can be improved.

The invention provides a sweeping detection method for an unmanned sweeping vehicle, and the method comprises the following steps of obtaining motor rotation speed values and motor current values, determining whether to judge whether there are foreign objects on the sweeping brush and whether the road surface is smooth according to the motor rotation speed values and the motor current values, andthus generating corresponding alarm information or speed reduction or acceleration information to the background control end, thereby realizing intelligent detection of sweeping, without manual operation, and avoiding detection deviation due to manual operation. The invention provides a sweeping detection method for an unmanned sweeping vehicle. The invention can effectively and timely detect whether there is foreign matter entangled on the sweeping brush, and the background control end can control the unmanned sweeping vehicle according to the sent alarm information or the speed reduction oracceleration information, thereby realizing the completely unattended operation of the unmanned sweeping vehicle.

The invention provides a powder material heat insulation effect evaluation device and an application method thereof and relates to material testing conducted through heat conduction testing. A test main body of the device comprises a thermotank and a test box, temperature controllers are installed on the thermotank, the test box is divided into an upper part and a lower part, a sample tank is installed in the middle of the test box, a powder material to be tested can be directly placed into the sample tank for measurement, a stable test environment is provided, detection deviation caused by the environment temperature, pressure, airflow, coating formulas and other external factors is avoided, and the test result can have stability and repeatability. The invention further provides a corresponding evaluation method, in other words, heat insulation effect evaluation of the corresponding powder material is obtained according to the measured temperature through the evaluation method. By means of the powder material heat insulation effect evaluation device and the application method thereof, the defects that in the prior art, powder material heat insulation effect evaluation devices are unstable in constant temperature environment setting, inconvenient to carry and long in test cycle, and requirements are difficult to meet are overcome.

A radar level meter includes an electronic component, a housing seat, a lower cover, an upper sleeve, a support base, a wave guide head inner rod, sealing rubber, a wave guide housing, a wave guide head top cover, a housing upper cover, a transparent window, a transparent window pressing ring, a cable sealing sleeve and an O-shaped sealing ring; the wave guide head inner rod is supported by a polysulfone support base arranged on the inner wall of the wave guide head housing, and then can be supported and fixed stably; combination of the sealing rubber and the O-shaped sealing ring can effectively ensure the sealing effect of the electronic component; the upper sleeve and the lower cover are made of polyether-ether-ketone material which can enhance the high pressure resistant feature of the radar level meter at the high temperature; time domains and frequency domains can be locally analyzed through the wavelet transform technique which is suitable for a fluctuation feature of echo signal transition during feeding or discharging of a storage tank to be measured, and then interference can be eliminated, a target reflection wave can be displayed in a maximum resolution ratio.