93results about How to "Fix measurement inaccuracies" patented technology

The invention provides a measuring method and system of packet loss, wherein the measuring method comprises the following steps: a first end obtains a received frame number of a current measure response frame and a frame number of a previous measure response frame, wherein the current measure response frame and the previous measure response frame are obtained by enabling a second end to respond to a packet loss measure message frame transmitted by a first end; the first end judges whether the difference between the frame number of the current measure response frame and the frame number of the previous measure response frame is 1 or not; and if the difference is 1, the first end figures out the packet loss according to the current measure response frame and counting information carried in the previous measure response frame; and if the difference is more than 1, the first end calculates to obtain the packet loss according to the current measure response frame and the counting information carried in the previous measure response frame as well as the difference between the frame numbers. According to the invention, the problem of inaccuracy in the packet loss measurement while the protocol frame loss exists in the prior art is solved so that a technical effect of accurately measuring the packet loss is realized.

The invention discloses a bearing roller pin size detection system and method based on machine vision. A single low-cost 2D camera is used for collecting images. An industrial camera is used to acquire the images. The acquired images are stored in an industrial personal computer. The industrial personal computer processes the images. Background interference is removed from the processed images byusing horizontal and vertical projection methods, angle correction is performed on an extracted ROI area. A ROI image is converted into a binary image by using a threshold segmentation method, and filling is performed to ensure that an internal color of a contour of a roller pin is white. Contour extraction is performed on the processed image. A detection size of the roller pin is calculated according to a proportional relation between a visual field range of the camera and an image pixel, the roller pin with a qualified size arrives at a storage box along with a transmission belt, and for theroller pin with a unqualified size, an elimination signal is sent to PLC by the industrial personal computer, and an elimination mechanism is controlled to eliminate the roller pin through the PLC. The roller pins moving on an assembly line are detected and removed in real time.

The invention provides a method and device for obtaining downlink channel quality information, so that obtained downlink CQI is matched with actual downlink CQI after the multi-antenna technology is led in a wireless communication system. The method includes the steps that transmission nodes in a cooperation node set obtain received noise power of UE 11 and interference power of nodes in a non-cooperation node set on the UE 11; the transmission nodes in the cooperation node set obtain interference power between users in multi-user scheduling of the transmission nodes in the cooperation node set and power of effective received signals of the UE 11; the transmission nodes in the cooperation node set obtain interference power of non-transmission nodes in the cooperation node set on the UE 11; the ratio of the receiving power of effectively signals and the sum of interference source power and the received noise power of the UE 11 is calculated, and the ratio is used as the value of the downlink CQI between the transmission nodes and the UE 11.

The invention discloses a channel quality information measurement method and device and a channel quality information measurement resource allocation method and device. The allocation method includes: a base station determines resource information used for excluding part of measurement resources in one of ways as follow; the base station allocates resource information of CRSs (common reference signals) in a resource block according to different CSI-RSs; the base station allocates resource information of multiple CRS sets in a resource block; the resource information in the corresponding resource block is allocated according to the detected allocated CRSs; the base station sets a set of CRS resource information; the base station determines resource information of the used CRS resources; the base station determines the resource information of OFDM symbols used by the CRSs; the base station allocates resource information such as resource information allocated by multiple MBSFN sets; the base station transmits the resource information to a terminal. The measurement resources are used for CQI measurement for the terminal. The channel quality information measurement method and device and the channel quality information measurement resource allocation method and device have the advantages that measurement of channel quality information is more accurate.

The invention relates to a device measuring the radial internal clearance of a bearing. The device comprises a platform, one side of the upper end face of the platform is horizontally provided with a bearing support, the other side of the upper end face of the platform is provided with an instrument frame, and the axis of an instrument panel, the axis of a header and the axis of the measured bearing are kept on the same straight line. By fixing the inner ring of the bearing, the outer ring of the bearing moving in the radial direction is measured through the instrument panel, a shown value is the radial internal clearance of the bearing, and the problems that as for a common measuring method, the inner ring can not be located, and measurement is not accurate are solved. In addition, the device is convenient to regulate and high in measuring efficiency.

The invention discloses a method and a device for processing power parameters. The method comprises the following steps: user equipment (UE) acquires the power relationship parameter and the ratio of a first kind of sub-frames and a second kind of sub-frames, wherein the power relationship parameter is used for indicating the power relationship of the first kind of sub-frames and the second kind of sub-frames; and the UE performs data demodulation operation and/or channel measurement operation on the first kind of sub-frames by utilizing the power relationship parameter and the ratio. Through the method and the device provided by the invention, the problem that the data demodulation or channel measurement of the UE is inaccurate due to different power configurations of different kinds of sub-frames in correlation techniques is solved, and the system performance is improved.

The present invention discloses an optical waveguide lightning pulse electric field detection device of suppressing the piezoelectric interference. The device comprises a tunable laser used for generating a laser signal of a preset working wavelength threshold value according to a control instruction of a control module; an optical waveguide electric field sensor used for sensing an electric fieldsignal in a to-be-detected area and outputting an optical signal; an optical fiber coupler used for dividing the optical signal into a first signal and a second signal according to a preset proportion and separately sending to a photoelectric detector and the control module; the photoelectric detector used for converting the first signal into a to-be-detected electric signal; the control module used for sending out the control instruction to the tunable laser according to the second signal, and controlling the wavelength of the laser signal sent out by the tunable laser. According to the present invention, by utilizing the tunable laser, the situation that the optical waveguide electric field sensor always works in a linear area is guaranteed, at the same time, by using the trapezoidal optical waveguide electric field sensor, the interference of the piezoelectric interference to the pulse signal measurement can be suppressed effectively, and an electric field generated by a lightningpulse signal can be measured more accurately.

The invention provides a laser measuring device for measuring the water level of a reservoir and a measuring method thereof. The device comprises an infrared distance measurement tracking head and a water level indicator target disc, wherein the infrared distance measurement tracking head is arranged on the control tower; the outer distance measurement tracking head comprises a tracking camera; aninfrared distance measuring head is arranged above the tracking camera; the tracking camera is hinged with the outer shell; the lower part of the shell is rotationally connected with a fixed plate; afirst driving device and a second driving device are arranged in the outer shell; the first driving device drives the outer shell to rotate; the second driving device drives the tracking camera to swing up and down; the water level indicator target disc is arranged on the water surface of the reservoir; the water level indicator target disc is fixed through a fixing anchor; a tracking camera in the infrared distance measuring tracking head is used for tracking the position of the water level indicator target disc, wherein the infrared distance measuring head is used for shooting on the waterlevel indicator target disc to measure the water level. By means of the device, a worker can master the water level of a reservoir in real time, the worker does not need to go to the site to read data, manpower is saved, and the water level measuring accuracy of the device is improved.

The invention provides a method for measuring the liquid level of an absorption tower. The method includes the steps as follows: calculating the slurry average density of any two predetermined heights through collecting the pressure values at the predetermined heights of slurry of the absorption tower; and obtaining a curve for the slurry density and the height of the absorption tower as per the slurry average density through adopting the interpolation fitting algorithm, so as to obtain the liquid level value of the slurry. The method provided by the invention effectively solves the problem that the liquid level measurement of the absorption tower is inaccurate in the prior art, is lower in the cost of the used detecting instrument in the invention compared with the cost of the used measuring instrument in the prior art, and reduces the production and running cost of a power plant.

The invention discloses a three-phase electric energy metering module and a calibrating method thereof. The three-phase electric energy metering module comprises a three-phase electricity input channel, a three-phase electricity calculating channel, a multi-channel selecting switch and a controller; and the controller is used for controlling switch-on and switch-off of the multi-channel selectingswitch so as to communicate the three-phase electricity input channel with the three-phase electricity calculating channel in different combination modes. The problems that in the prior art, the three-phase electric energy metering module inaccurately measures possibly is solved, and the measuring precision of the three-phase electric energy metering module is improved.

The invention discloses a method and a device for measuring a cell reference signal. The method comprises the following steps that: a base station of a service cell in which a mobile station is located sends measuring frequency points to the mobile station; and the mobile station disperses a total measurement bandwidth to the measurement frequency points according to an instruction of the base station, and carries out measurement. According to the method and the device provided by the invention, the measurement frequency points measured by the mobile station are dispersed, so that a disturbed condition in the entire system bandwidth is sufficiently reflected by a measurement result. Therefore, the problem of inaccurate measurement results caused by that the measurement only can be carried out on six wireless resource blocks in the center of a frequency band of the service cell in the prior art can be solved.

The invention provides a measuring method of a received signal strength indicator (RSSI), a measuring device of the RSSI, and a receiver. The method comprises the following steps: a digital domain RSSI output at the front end of the receiver is measured; an access noise power at the front end of the receiver is measured; a digital domain power dB value of an obtained receiving signal is calculated according to the digital domain RSSI and the access noise power; the differential value of the digital domain power dB value of the receiving signal and a processing gain at the front end of the receiver is calculated, so that the RSSI at the front end of the receiver is obtained. When the RSSI is calculated, the influence of the access noise is removed, so that the relatively accurate RSSI can be obtained; and the problem of the inexact RSSI measurement of the existing measurement solution under a small signal is solved.

The invention discloses a wheel type range finder which comprises a range finder body. The range finder body comprises a wheel carrier and a measurement wheel. The wheel carrier is connected with a guide wheel through a guide frame. A guide groove matched with a guide rail is formed in the wheel face of the guide wheel. The guide wheel is installed in front of the measurement wheel. The guide wheel with a positioning groove is installed on the wheel type range finder and conducts guiding in front of the measurement wheel, the guiding performance is good, it is avoided that the measurement wheel on the rail is likely to fall off the face of the rail, and the measurement precision is greatly improved. The range finder is placed on the face of the rail and can be pushed forwards at a high or low speed, more time and labor are saved for operators, the measurement efficiency is improved, the problems that in the prior art, measurement is not precise, operation is not convenient and time and labor are wasted are effectively solved, and the wheel type range finder has the advantages of being simple in structure, convenient to operate, use, assemble, disassemble and maintain, and low in price.

The application discloses a heart shock signal measuring device, method and seat, which belong to the field of medical measurement. The device includes: a measuring circuit for measuring the BCG signal of the first part of the human body, a compensation circuit for measuring the compensated BCG signal of the second part of the human body, and a circuit for obtaining an effective BCG signal after fusing the measured BCG signal and the compensated BCG signal controller. In this application, the effective BCG signal is obtained by fusing the measured BCG signal and the compensated BCG signal through the controller, and the BCG waveform diagram is generated according to the effective BCG signal. Since the measured BCG signal has a sharply attenuated signal segment, the amplitude of the compensated BCG signal is relatively weak. Compensating the BCG signal compensates the sharply attenuated signal segment corresponding to the measured BCG signal, which solves the problem of inaccurate measurement caused by generating the BCG waveform diagram only by measuring the BCG signal of one part, and improves the accuracy of the BCG signal measurement.

The invention relates to a carbon dioxide detection device which is low in cost and is suitable for solar greenhouses. The carbon dioxide detection device includes a power supply module, a data processing module and a carbon dioxide data detection module which are arranged in a sealed shell body. The power supply module supplies power to the data processing module and the carbon dioxide data detection module. The data processing module is connected to the carbon dioxide data detection module. The carbon dioxide data detection module includes a protective apparatus and a carbon dioxide sensor. One end of the protective apparatus is provided with a waterproof protective apparatus and the other end of the protective apparatus is sealedly fixed with the shell body. An air flowing channel is formed in the protective apparatus. The carbon dioxide sensor detects the concentration data of carbon dioxide and then sends the data to the data processing module for storing and displaying the data. The carbon dioxide detection device is suitable for agricultural production in the solar greenhouses and can be used for monitoring the concentration of carbon dioxide in real time.

The invention discloses a hot casting measuring method and device based on a compressed sensing algorithm. The method comprises the following steps of step1, obtaining a complete optical signal of a part to be tested of a tested hot casting, and converting the obtained optical signal into an electrical signal; step2, converting the electrical signal into an electrical signal matrix, and simplifying the electrical signal matrix into an equation; step3, solving an electrical signal equation through a compressed sensing algorithm to obtain a vector C; step4, restoring the obtained vector C to a two-dimensional grid matrix according to a principle of a row priority, and acquiring image information of the part to be tested of the tested hot casting; and step5, obtaining size information of thepart to be tested of the tested hot casting according to the image information of the part to be tested of the tested hot casting. Through measuring the hot casting under shielded high-temperature-resistant asbestosed wire gauze multiple times and combining the compression sensing algorithm, the measurement information of the complete hot casting is acquired, and a shape of the tested hot castingcan be accurately obtained.

The invention relates to a semiconductor device and a manufacturing method thereof. The semiconductor device comprises a semiconductor substrate, and the semiconductor substrate comprises a plurality of chip areas and cutting channels used for separating the chip areas; a test structure is formed in the cutting channel, the test structure comprises an active region and a connecting structure, the active region is formed in the semiconductor substrate, the connecting structure is located at the end part of the active region, and the plurality of active regions located on the same column are sequentially connected end to end through the connecting structure; the test structure is used for bit line contact resistance test. In the embodiment of the invention, the semiconductor device is provided with a test structure for testing the bit line contact resistance in a cutting channel, and a plurality of active regions in the same column are sequentially connected end to end through a connection structure at the end part of the active region, so that the sum of the contact resistance of a plurality of bit lines in the same column and the resistance value of the active regions is obtained; the problem that measurement is inaccurate due to the fact that the shallow trench isolation structure is abnormal is solved, the testing accuracy is improved, and then the product quality is improved.

The invention discloses a blood pressure measurement method and a sphygmomanometer. The audio information of korotkoff sounds of a tissue to be tested and pressure information of the tissue to be tested are obtained; the multiple korotkoff sounds in the beginning time period of the audio information are screened, and the korotkoff sound with the largest decibel amplitude change among the multiplekorotkoff sounds is selected as a first korotkoff sound; the multiple korotkoff sounds in the ending time period of the audio information are screened, and the korotkoff sound with the largest decibelamplitude change among the multiple korotkoff sounds is selected as a second korotkoff sound; a first time point corresponding to the first korotkoff sound is determined, a second time point corresponding to the second korotkoff sound is determined, a first pressure value of the tissue to be tested is determined according to the first time point and the pressure information, and a second pressurevalue of the tissue to be tested is dertermined according to the second time point and the pressure information; and the first pressure value and the second pressure value are a high pressure value and a low pressure value of the tissue to be tested. According to the present invention, the problem that sphygmomanometer is affected by subjective factors and the measurement is inaccurate is solved,and the accuracy of blood pressure measurement is improved.

The invention discloses a PCB pin welding and drawing test device, and belongs to the technical field of PCB test devices.The PCB pin welding and drawing test device comprises a power box, a storage cabinet is fixedly connected with the bottom of the power box, a first clamping body is installed in the middle of the top of the power box, longitudinal supports are welded to the two ends of the top of the power box, a top frame is welded to the tops of the longitudinal supports, a longitudinal power device is installed on the inner side wall of each longitudinal support, and each longitudinal support is connected with a transverse sliding rail through the corresponding longitudinal power device. A clamping body is arranged on the surface of the PCB pin welding and drawing test device, fast assembly and disassembly of a PCB can be achieved, fast assembly and disassembly of pins on the PCB can also be achieved, rebound and clamping of double springs are stable, and the pins are not prone to falling off. According to the PCB pin welding and drawing test device, a machine measurement method is adopted to replace a manual drawing test method, vertical drawing is achieved, the test precision is high, and a large amount of manpower, material resources and financial resources are saved.

The invention relates to a storage cabinet stock material real-time metering method and device for tobacco production. A storage cabinet stock material real-time metering system for tobacco production comprises a controller, a monitoring device, a distribution device, a storage cabinet and a discharging device. According to the scheme, materials are stacked in a specific shape in the storage cabinet, displacement of the materials is monitored by means of a ranging sensor in the production process, the volume of the storage cabinet stock materials is calculated, the mass of the storage cabinet stock materials is determined according to density of the materials, and accordingly metering of the storage cabinet stock materials is achieved. The mass of the storage cabinet stock materials is accurately measured, state information of the storage cabinet is reliably judged, guarantee is provided for statistics and tracking of the storage cabinet materials and subsequent accurate scheduling of the materials, and the problems that the quantity of materials remaining in the storage cabinet cannot be accurately measured, and accordingly production efficiency is reduced and product quality is reduced are avoided.

The invention discloses a packaging structure and method of an infrared thermal pile sensor. The packaging structure comprises a first substrate, a thermopile structure and a sealing cover substrate, wherein the thermopile structure is positioned on the first surface of the first substrate and includes a thermopile main body consisting of at least one group of thermocouple pairs; and the sealing cover substrate is arranged above the thermopile structure, a first cavity is formed by the sealing cover substrate and the upper surface of the thermopile structure, and a film-shaped thermistor is arranged on the sealing cover substrate. The thermistor is arranged on the sealing cover substrate so that the thermopile structure and the thermistor can be formed in the same packaging structure at the same time, integrated packaging is achieved, the process steps are shortened, the size of the infrared thermopile sensor is reduced, and the reliability of the infrared thermopile sensor is improved.

Disclosed are a geotechnical test air pressure consolidation permeameter and a test monitoring method thereof. The air pressure consolidation permeameter includes an air pressure loading device, a combined consolidation permeation sample device and a test index measurement device. The air pressure loading device includes a fixing base (18), a pressure supply reserve tank (35), a piston jacking pipe (15), brackets (1), a horizontal counterforce cross bridge (5), and electronic air pressure sensors (17) arranged on the pressure supply reserve tank. The combined consolidation permeation sample device includes a supporting seat (14), a base (13), a tank sleeve (10), a soil sampler (9), lower permeable stone (12), upper permeable stone (25), an inner tank pressure cover (7), an upper pressure box (8), an external threaded drainage jacking pipe (23), and a pressure rod (36). A sample cabin (11) is between the upper permeable stone and the lower permeable stone. The base (13) is provided witha water inlet channel (24). The test index measurement device includes an electronic flowmeter (13), electronic displacement sensors (16), an electronic pore water pressure gauge (26) and a permeablewater head pipe (19). The geotechnical test air pressure consolidation permeameter and the test monitoring method thereof has the advantages of small test error and convenient and fast operation.