114results about How to "Eliminate detection errors" patented technology

The application provides a membrane thickness detection device, comprising a common electrode, at least one detection electrode and a detection circuit, wherein each detection electrode and the common electrode are arranged oppositely and at intervals in a first direction; the first common surface of the common electrode and the first detection surface of each detection electrode are opposite, and form a detection channel therebetween for a membrane to be measured; the detection circuit is in electric connection with each detection electrode, and comprises an error elimination unit used for eliminating noise signals, wherein the noise signals are electric signals on the detection electrode when a voltage is not applied to the common electrode. The membrane thickness detection device utilizes the error elimination unit to eliminate noise signals on the detection electrode, furthermore eliminates detection errors caused by the noise signals, and makes detection results more accurate.

The invention discloses a system for conducting online monitoring of reinforcement corrosion in concrete. The system comprises a plurality of sensing devices and upper monitoring computers which are arranged at each detecting point in the concrete. The input end of the upper monitoring computer is connected with a data conversion circuit. The system is characterized in that the system further comprises sampled signal processing circuits correspondingly connected with the sensing devices at each detecting point. The sensing device comprises a temperature sensor and a combined sensor which can simultaneously detect pH value, CI<-> ion concentration value, open circuit potential, polarization resistance and corrosion rate function. The signal output end of the sampled signal processing circuit is connected with the signal input end of the data conversion circuit. The system can compensate temperature, eliminate detection error, and improve the precision and sensitivity of a detecting device in the detecting process. Furthermore, at the same time of improving the detection precision, the system greatly simplifies the structure of the circuit. In addition, when a failure in one detecting points occurs, the whole monitoring system can still operate normally.

The invention provides a display substrate, light-on equipment and a detection method of light-on test pin alignment.The display substrate comprises a display drive signal line and at least a group of testing bonding pads, and the plurality of testing bonding pads in the same group are sequentially arranged.Each group of testing bonding pads comprises the plurality of light-on testing bonding pads connected with the display drive signal line and two pin miss testing bonding pads which are not connected with the display drive signal line, and the two pin miss testing bonding pads are electrically connected.The arrangement of each group of pins in the light-on equipment is identical with the arrangement of the group of testing bonding pads corresponding to the group of pins.The detection method uses the light-on equipment to perform light-on test pin alignment detection on the display substrate.By the display substrate, the light-on equipment and the detection method, extra detection time is not needed, high reliability is achieved, staff needs not to contact the display substrate during operation, static is reduced, and product damage risks are lowered.

A method for detect that bottom topography of a phase-type defect of an EUV photolithography mask multilayer film is disclosed. The method includes modeling and detection. In the modeling phase, firstly, the spatial images of blank mask with multilayer phase defects under different illumination conditions are simulated by photolithography simulation software. Fourier transform coherent diffractionimage (FPI) is used to recover that phase of the spatial image, Finally, an artificial neural network is used to establish the detection model, which takes the spatial image information as input andthe mask multilayer phase defect bottom topography parameters as output. In the detection phase, the actual mask space image is collected, and the bottom topography parameters of the actual mask defects are calculated by using the detection model, and the bottom topography of the mask multilayer phase defects is detected. The invention can quickly and accurately detect the topography of the bottomof the phase type defect of the extreme ultraviolet photolithography mask multilayer film.

The invention discloses an intermediate infrared laser gas sensing detecting device. An intermediate infrared laser LED and an orthogonal phase-locking detection technique are adopted for effectively detecting the trace gas. The light source of the device is composed of two pieces of far infrared laser LEDs and respectively covers a gas absorption spectrum of the gas and a non-gas absorption spectrum. The detecting signal is amplified by a driving and switching unit and two laser tubes can be controlled by the driving and switching unit so as to emit the light according to the time sequence, meanwhile, the gas is detected, the impact caused by the environment and the circuit drift is effectively eliminated, the precision is high, the cost is low and the noise is low.

The present invention discloses a medium thickness detecting device which comprises a reference roller (123), a thickness measuring roller (124) opposite to the reference roller (123), a detected element (131) which moves with the thickness measuring roller (124) synchronously, a first detection element (132) for detecting the detected element (131) and outputting a first electric signal, a second detection element (133) which is arranged at the second movement direction of the detected element (131) and outputs a second electric signal, and a control unit which detects the thickness of the medium between the reference roller (123) and the thickness measuring roller (124) through the first electric signal and the second electric signal. A medium transmission channel is formed between the reference roller (123) and the thickness measuring roller (124). Through the medium thickness detecting device, the accuracy of the medium thickness detection is improved.

The invention discloses a gas storage well shaft detection system based on an ultrasonic phased array technology and a detection method thereof. The system comprises surface equipment such as a system host, optical fiber communication equipment and an encoder as well as underground equipment such as a centering device, an ultrasonic phased array detector and an annular phased array probe. The detection method includes the steps that the system host is started, and the centering device is adjusted to keep the underground equipment in coaxial parallel with a shaft; electric signals, for detecting control information, of the system are converted into optical signals through an optical transceiver and are transmitted to the ultrasonic phased array detector through optical fiber; the annular phased array probe is stimulated by the ultrasonic phased array detector according to the focusing law to transmit ultrasonic waves to scan the shaft wall; after being converted into optical signals, collected echo electric signals are transmitted to the system host through optical fiber to be stored and processed into images. Real-time S display and C display can be achieved by the detection system, the scanning coverage rate can be flexibly adjusted by changing the stepping magnitude of an ultrasonic deflecting angle, a corroded part is located and scanned carefully, and detection speed and detection precision are high.

The invention discloses a three-wavelength oxyhemoglobin saturation detection method and device and wearable equipment. The method comprises the steps of oxyhemoglobin detection, error detection, error calculation and oxyhemoglobin calculation. By means of the three-wavelength oxyhemoglobin saturation detection method and device and the wearable equipment comprising the device, the detection errorcaused by noise due to movement can be removed, and a more accurate oxyhemoglobin saturation detection result can be obtained.

The invention relates to a bandpass sigma-delta closed-loop detection circuit of silicon micro gyroscope. The circuit comprises connected SMG capacitance/voltage conversion circuits, pre-amplifier circuit, modulus converter, digital resonator, one-digit quantizer and one-digit DAC circuit; the closed-loop detection circuit can effectively eliminate detection error arising from error in mechanical processing, eliminate the sensitivity of detection output to the error in gyroscope and enhance the bandwidth of the whole detection circuit; it can also effectively performs noise shaping for the subsequent one-digit round and enhance the signal to noise ratio of the whole detection loop.

The invention provides a bearing assembly high-size detection instrument, which belongs to the field of bearing detection, and comprises a detection platform, an upper tool, a lower tool, a pressure sensor, a linear actuator and a loading platform. The lower tool is arranged on the detection platform, the loading platform vertically slides on the detection platform, and the loading platform is driven by the linear actuator. The upper tool is arranged at the bottom of the loading platform, and the pressure sensor is located between the upper tool and the loading platform. A first distance detection sensor and a second distance detection sensor are further arranged at the bottom of the loading platform, the detection end of the first distance detection sensor is arranged downwards and is opposite to the upper end face of a to-be-detected bearing placed on the lower tool, and the detection end of the second distance detection sensor is arranged downwards and is opposite to the upward endface of the lower tool located on the same horizontal plane with the lower end face of the to-be-detected bearing. According to the invention, the assembly high-size measurement difference caused by small axial load can be avoided, the qualified rate of a bearing is improved, and the processing cost is reduced.

The present invention discloses a steel rail flatness and torsion detection device and method. The device comprises a plurality of spectral confocal displacement sensors and a plurality of linear laser contour sensors. The spectral confocal displacement sensors are symmetrically arranged at two sides of a steel rail and two sides of the bottom portion of the steel rail to measure distances from the side of a rail head of the steel rail and measured points at the bottom portion of the steel rail to the sensors; the linear laser contour sensors are put at the top portion of the rail head of thesteel rail to collect a steel rail tread curve; and the spectral confocal displacement sensors and the linear laser contour sensors are connected with a data collection storage to perform analysis andprocessing to obtain the flatness and torsion of the steel rail. The detection method mainly employs the spectral confocal displacement sensors and the linear laser contour sensors to collect geometrical parameters of the surface of the steel rail to obtain flatness and torsion of the steel rail through data analysis and calculation.

The invention discloses a hydraulically powered gas injection valve which comprises a valve body and a valve element, wherein a valve bush is arranged in the valve body; an electromagnetic valve communicating with an inner cavity of the valve body is mounted at the external part of the valve body; a valve rod of the valve element and the valve bush are in sliding fit; the valve rod is provided with a first stretching part and a second stretching part stretching out of the valve bush; the first stretching part of the valve rod is fixedly connected with a magnet through a magnet seat; a magnetic field sensor is fixed in the valve body and corresponds to the magnet in position; and a sliding guiding device is arranged between the valve rod and the valve bush. The magnet is fixed with the valve element through the magnet seat and moves along with the valve element, and the magnetic field sensor detects variation of a magnetic field to sense the stroke of the valve element so as to accurately control opening of the valve element; and through the sliding guiding device, the valve element is enabled not to rotate during axial movement, so that detection error brought to the magnetic field sensor by magnetism difference of the magnet in the circumferential direction is eliminated, and measurement accuracy is improved.

The embodiment of the invention discloses an antenna device and electronic equipment. The antenna device comprises a non-metal dielectric plate, an antenna and a plurality of electromagnetic band gapunits, wherein the antenna and the plurality of electromagnetic band gap units are arranged on the non-metal dielectric plate, and the plurality of electromagnetic band gap units are arranged around the antenna according to a first array mode; and the electromagnetic band gap units are used for suppressing surface electromagnetic wave transmission of the non-metal dielectric plate. Therefore, by arranging the electromagnetic band gap unit array around the antenna, for all incoming wave directions and antenna polarization directions, the electromagnetic band gap unit array can inhibit surface electromagnetic wave transmission of the non-metal dielectric plate and eliminate interference of surface electromagnetic waves of the non-metal dielectric plate on the antenna, so that detection of anarrival angle is irrelevant to antenna polarization, then the detection error caused by different antenna polarizations is eliminated, and the detection precision of the arrival angle is improved.

The invention discloses a multi-blade collimator blade zero calibration device. The device comprises a photoelectric switch assembly, a light path collimation assembly, a blade assembly and a blade driving control assembly which are installed on a multi-blade collimator base. The photoelectric switch assembly is used for forming a detection light beam and feeding back a calibration signal to the driving control assembly; the light path collimation assembly is used for ensuring that the divergence error of the detection light beam in the detection range meets the positioning precision requirement; and a plurality of blades in the blade assembly are respectively driven by the blade driving control assembly to move to the detection light beam for zero calibration. According to the invention, the optical path of one photoelectric switch is segmented and collimated through the light path collimation assembly, trigger errors of different positions of the optical path of the photoelectric switch caused by long-distance transmission scattering are eliminated, the zero consistency of each blade of a multi-leaf collimator is improved, and zero errors caused by inconsistency of the trigger precision and attenuation speed of multiple photoelectric switches are eliminated at the same time.

Provided in the invention is a device for on-line detection of water-quality biotoxicity. The device comprises a sample preparation unit including a water sample pretreatment unit, a mechanical arm unit, a sampling detection unit and a drive analysis unit. The sample preparation unit and the sampling detection unit employ the parallel two-channel technical solution to realize simultaneous measurement of a reference water sample and a to-be-detected water sample and eliminate a system error and a measurement deviation. The device has advantages of simple operation, great convenience in maintenance, high automation degree, flexible configuration and the like and is especially suitable for real-time online water-quality toxicity detection of the surface water, the drinking source water, and various waste water.

The invention discloses a blood leakage detection device for an extracorporeal circulation line, and the device comprises a power module, a microcontroller, a light source control module, a temperature measurement module, and a storage module, wherein the power output terminal of the power module is connected to the power input terminals of the microcontroller, the light source control module, thetemperature measurement module and the storage module; the signal input and output terminal of the microcontroller is communicatively connected to the signal input and output terminal of the light source control module, and is communicatively connected to the signal input and output terminal of the temperature measurement module; and signal input and output terminal of the microcontroller is communicatively connected to the signal input and output terminal of the storage module. According to the ingenious design of the circuit, the light sensor is digital and directly outputs digital signals,thereby avoiding errors generated in the signal amplification process and analog-to-digital conversion process, and making the leak detection device have higher sensitivity and lower false alarm rate.

The invention provides an online detection method for deviation of hot-rolled strip steel, and belongs to the technical field of plate and strip rolling automation. According to the method, a machine vision technology is adopted, a binocular linear array camera is used for collecting strip steel images in real time, the real-time width and deviation amount of the strip steel are calculated through means such as edge detection, the influence of loop angle swing on a detection result is effectively eliminated, and finally camera error compensation is added to guarantee the detection precision. According to the strip steel deviation amount detected through the method, the deviation detection precision of the strip steel can be improved to the millimeter level, and a reliable basis is provided for follow-up strip steel deviation control.

The invention relates to a super-low range turbidity sensor. According to the invention, a heating element is added on a light source part, a lens of the light source part is kept at constant temperature, Atomized condition of the light source part can be overcome, and detection accuracy of the turbidity sensor is increased. The turbidity sensor comprises an upper housing, a lower housing, a detection control integrated circuit, a light source and a photoelectric converter member; the photoelectric converter member comprises several photoelectric conversion monomers, the photoelectric conversion monomers are connected in series to form a ring; the light source and light-transmission through holes are arranged in the upper housing, a water channel pipe as a water body turbidity detection area is arranged in the lower housing; a transversely penetrated recess cavity is arranged between the upper housing and lower housing, and an open-type isolation region is arranged between the upper housing and the lower housing by the recess cavity.

The invention relates to an electric Wechsler hardness tester, which comprises a control system, a power execution mechanism and a measuring head device, wherein the control system is connected with the power execution mechanism and drives the power execution mechanism; and the power execution mechanism is connected with a tested piece and drives the measuring head device to detect the contact pressure hardness of the tested piece arranged on an anvil block. The electric Wechsler hardness tester has the characteristics of high stability, low labor intensity, high measurement accuracy, simple calibration operation, low detection error, high detection precision and the like.

The invention discloses an engine thermostat lower shell air tightness detection tool which includes an upper base plate (1) and a lower base plate (2). The upper base plate (1) and the lower base plate (2) are fixedly connected by four columns (3). The lower base plate (2) is provided with a positioning mechanism (4), and the lower base plate (2) is provided with a first cylinder (5), a second cylinder (6) and a third cylinder (7). The upper base plate (1) is provided with a fourth cylinder (8) and a fifth cylinder (9). The piston rods of the five cylinders are respectively provided with plugs, and the five plugs correspondingly seal the connecting holes of a lower shell. The lower base plate (2) is further provided with an automatic adjusting mechanism used for adjusting the position ofthe lower shell (100). The engine thermostat lower shell air tightness detection tool disclosed by the invention has high test efficiency. The position of a product can be adjusted in the test process. The accuracy of the test result is improved.

The invention relates to a multi-wire sawing machine wire bow height automatic adjustment control system and method. The multi-wire sawing machine wire bow height automatic adjustment control system comprises a multi-wire sawing machine, a feeding workbench, a left sensor, a right sensor and a controller; the feeding workbench is installed above the multi-wire sawing machine and right faces a sawing part of the multi-wire sawing machine, and the left sensor and the right sensor are installed on the left side and the right side of the feeding workbench respectively. and the left sensor and the right sensor are both electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the feeding workbench. The left sensor and the right sensor are used for detecting the real-time wire bow height of the multi-wire sawing machine, the controller adjusts the feeding speed of the feeding workbench according to the real-time wire bow height detected by the left sensor or/and the right sensor so as to automatically adjust and control the wire bow height of the multi-wire sawing machine, the sample trial-manufacturing cost can be reduced, the consistency of batch production is improved, the cost of batch production consumables is reduced, the labor cost is reduced, human errors are avoided, and the production efficiency is improved.