36results about How to "Adapt to Measurement Needs" patented technology

The invention relates to an online water quality monitoring device and method based on full spectra. The device comprises a pulse xenon lamp, a cleaning module, a spectrum measuring module and a control unit. One end of the cleaning module is connected with the pulse xenon lamp, the other end of the cleaning module is connected with the spectrum measuring module, the control unit controls the pulse xenon lamp to emit pulse light, controls the cleaning module to clean a measuring surface as needed and carry out light path switching, and controls the spectrum measuring module to read the light signal intensity of each waveband. According to the online water quality monitoring device and method based on full spectra, ultraviolet visible full waveband absorbing spectra are adopted for measuring the water pollution condition, factors such as COD, BOD, TOC, nitrate, nitrite, the turbidity and chromaticity can be measured, and the online water quality monitoring device and method based on full spectra have the advantages of being high in measuring precision, short in measuring time, large in number of monitoring factors, free of a reagent and secondary pollution and the like; the changing condition of water pollution is reflected in real time, and corresponding chemical models can be established according to ingredients of field water samples to meet the demands for measuring different water bodies.

The invention discloses an on-line monitoring system of coal characteristics of as-fired coal. The on-line monitoring system of the coal characteristics of the as-fired coal comprises a sampling unit, a plasma spectrum analysis unit, a sample storage unit, a three-way particle flow measuring unit and a sample returning unit, wherein one end of the sampling unit is connected into an as-fired coal powder pipeline; the other end of the sampling unit is connected to one interface of the three-way particle flow measuring unit; the plasma spectrum analysis unit is connected to another interface of the three-way particle flow measuring unit; the sample returning unit is connected between a third interface of the three-way particle flow measuring unit and the as-fired coal powder pipeline; the sample storage unit is connected between the third interface of the three-way particle flow measuring unit and the sample returning unit or is connected between the sampling unit and the three-way particle flow measuring unit. The on-line monitoring system of the coal characteristics of the as-fired coal is simple in structure, free of complex sampling pipelines and few in mechanical moving parts; the reliability of long-term operation of the on-line monitoring system can be improved, and the as-fired coal does not need to be measured after being tableted (cake-pressed).

The invention discloses a temperature control type electro-acoustical pulse-method space charge measuring device. The temperature control type electro-acoustical pulse-method space charge measuring device comprises a direct-current voltage source inputting device for exerting direct-current voltage on the first end face of a measured sample, a pulse voltage inputting device for exerting pulse voltage on the first end face of the measured sample, a metal electrode in contact with the second end face of the measured sample, a temperature regulation and control unit for conducting temperature regulation and control on at least one of the first end face and the second end face of the measured sample, a piezoelectric sensor, a piezoelectric sensor temperature protection unit for regulating and controlling the working temperature of the piezoelectric sensor, and a signal outputting unit for outputting data converted by the piezoelectric sensor. The temperature control type electro-acoustical pulse-method space charge measuring device has the following advantages that a wide-temperature-range regulation and control function, a temperature gradient regulation and control function and a quantitative regulation and control function of multi-physical-field coupling conditions can be achieved, further has the advantages of being small in size and adopting high-voltage-resistance electrode structure design, can meet the measurement demands of insulation materials different in thickness and is simple to manufacture and convenient to operate.

A large complex surface 3D topography robot flexible measuring system belongs to the technical field of topography measurement. The technical problem in the prior art that the measuring equipment cannot realize online measurement due to lack of flexibility, and has low degree of automation, low accuracy of point cloud splicing and measuring efficiency yet to be improved is solved. The measuring method of the measuring system comprises the following steps: S1, building a complex surface measuring system model; S2, planning a complex surface trajectory, and performing offline programming; S3, measuring the 3D topography of the complex surface; and S4, processing the measurement data of the complex surface, and using a global point cloud splicing technology based on IGPS to complete point cloud data splicing. For different measurement products, the robot control program can be replaced at any time to adapt to different measurement requirements. An industrial robot can communicate with a computer in real time, and the degree of automation of the system is improved.

The invention discloses an auxiliary device and a working method applicable to advance forecast of a tunnel geological radar method, the auxiliary device comprises flexible railways, a radar antenna carrying unit and a power providing unit, the flexible railways are arranged on the two sides of a geological forecast line, and is fixed on a tunnel face, the radar antenna carrying unit comprises a pulley and radar antenna clamping units, the pulley and the radar antenna clamping unit are connected through a detachable shock absorber, the radar antenna carrying unit is free to slide on the flexible railways through the pulleys after provided with the radar antenna, the power providing unit receives and controls the movement and fixation of the radar antenna carrying unit on the flexible railways according to the control instruction, and makes the radar antenna carrying unit reach the specified location of the geological forecast line.

The invention discloses a respective drive type multifunctional caliper. The respective drive type multifunctional caliper comprises a motor, a pump, hydraulic oil paths, electromagnetic valve sets, hydraulic cylinders, springs, pushing rods and backup arms. The motor is in transmission connection with the pump through a coupler, and each hydraulic oil path comprises a main oil path body and a branch oil path body; the pump is arranged at the upstream ends of the main oil path bodies, and the branch oil path bodies corresponding to the backup arms in a one-to-one manner are arranged at the downstream ends of the main oil path bodies in a parallel-connection manner; the electromagnetic valve sets are sequentially connected with the hydraulic cylinders with pistons inside to form execution mechanisms, and the execution mechanisms are arranged on the corresponding branch oil path bodies to be used for controlling the branch oil path bodies to be on and off and reversed; and one end of each pushing rod is connected with a piston rod, and the other ends of the pushing rods are connected with the backup arms. The motor drives the hydraulic pump to generate certain hydraulic pressure, and the electromagnetic valve sets independently control generated hydraulic branch paths and push the pistons of the corresponding hydraulic cylinders to move; the corresponding piston rods push connecting rods and indirectly push the backup arms to move, and therefore simultaneous respective drive control of the backup arms in the caliper can be achieved; and measuring is accurate and controllability is high.

The invention relates to an online water quality monitoring device and method based on full spectra. The device comprises a pulse xenon lamp, a cleaning module, a spectrum measuring module and a control unit. One end of the cleaning module is connected with the pulse xenon lamp, the other end of the cleaning module is connected with the spectrum measuring module, the control unit controls the pulse xenon lamp to emit pulse light, controls the cleaning module to clean a measuring surface as needed and carry out light path switching, and controls the spectrum measuring module to read the light signal intensity of each waveband. According to the online water quality monitoring device and method based on full spectra, ultraviolet visible full waveband absorbing spectra are adopted for measuring the water pollution condition, factors such as COD, BOD, TOC, nitrate, nitrite, the turbidity and chromaticity can be measured, and the online water quality monitoring device and method based on full spectra have the advantages of being high in measuring precision, short in measuring time, large in number of monitoring factors, free of a reagent and secondary pollution and the like; the changing condition of water pollution is reflected in real time, and corresponding chemical models can be established according to ingredients of field water samples to meet the demands for measuring different water bodies.

The application discloses a method and circuit for detecting axle counting frequency signals. The method comprises the following steps: receiving and detecting voltage signals input by a sensor; performing voltage isolation processing to the voltage signals; performing band-pass filtering with multiple different frequencies to the isolated voltage signals; performing data processing and frequency measurement to each filtering signal subjected to band-pass filtering processing so as to obtain characteristic information of three frequency signals, wherein the characteristic information comprises a value of amplitude of voltage and a frequency value. The method adopts the manner of combination of high-pass filtering and band-pass filtering to finish processing the input voltage signals, parallel processing of three frequency bands is performed to the input voltage signals through the topological structure, and the problem existing in the conventional axle counting system is solved.

The invention relates to an automatic adjustment photoelectric sensor signal circuit based on a feedback system. A controller is connected to an LED driving circuit which drives a light emitting device to emit light. One side of the light emitting device is provided with a light receiving sensor. A light blocking device is arranged between a light receiving device and the light receiving sensor. After the light receiving sensor senses the light reflected by a wounded part, signal current is generated and is processed by a sensor signal processing circuit, a feedback circuit feeds a signal to a controller, and the controller adjusts the LED driving circuit according to the feedback signal to control the brightness of the light emitting device. According to the automatic adjustment photoelectric sensor signal circuit, through connecting the feedback circuit behind the light receiving sensor, the real-time adjustment can be carried out according to various environmental temperature changes in concrete detection, thus accurate data is measured, few peripheral devices are employed, the quality of a sensor output effective signal can be greatly improved, and the automatic adjustment photoelectric sensor signal circuit is adapted to measurement requirements in different environments.

The invention relates to a device and a method for improving an OFDR frequency domain sampling rate. The device comprises a sweep-frequency laser device, an optical fiber coupler, a measurement module, an auxiliary module, a data acquisition card, and a computer. In the measurement module, a reference arm signal and a measuring arm are subjected to beat frequency interference, and a generated beatfrequency signal is acquired by means of the data acquisition card which is controlled by means of an external clock signal generated in the auxiliary module in an equal frequency domain manner. Themethod comprises the steps of: dividing N times of sampling according to the magnitude of the measurement length, utilizing a frequency shifter for adjustment under the condition that the two arm frequency difference of an interferometer of the auxiliary module is fixed, and sequentially subjecting sampled signals to frequency translation for data acquisition; and performing FFT operation after superposing the data acquired repeatedly to obtain a finally result. The method improves the OFDR frequency domain sampling rate, is conductive to expand the OFDR measurement range, can adjust the measurement range according to user needs, is convenient, has precise results, and can meet the requirements of various measurement environments.

The invention discloses a dual-mode disturbance broadband impedance measurement method and a dual-mode disturbance device. The measurement method comprises the following steps: measuring the impedance in a voltage disturbance mode, measuring the impedance in a current disturbance mode, and respectively combining the impedance of the VSC type equipment or the power network in the voltage disturbance mode and the impedance of the VSC type equipment or the power network in the current disturbance mode to obtain the impedance of the VSC type equipment or the power network. The dual-mode disturbance device comprises a first transformer, a harmonic power module, a mode selector and a coupling transformer; and the secondary side of the first transformer is connected to the input end of the harmonic power module, and the output end of the harmonic power module is connected to the primary side of the coupling transformer through the mode selector. According to the invention, the high-precision impedance measurement requirements of the VSC type equipment and the power network are met, the measurement requirements of the impedance of the VSC type equipment and the impedance of the power network during time varying can be met, and the blank in dual-mode and controllable broadband high-precision impedance measurement methods and disturbance devices is filled up.

According to the digital holographic surface three-dimensional topography measurement system and the imager provided by the invention, micron-scale precision surface three-dimensional structure imaging under a centimeter-scale field of view can be realized by the arranged objective lens module interface when any objective lens module is not assembled. When imaging requirements of other actual conditions such as partial cell imaging and MEMS system imaging are met, different objective lens modules are assembled on the objective lens module interface to meet different transverse resolution requirements and view field range requirements. Moreover, a self-aggregation module is arranged in the digital holographic surface three-dimensional topography measurement system, the focal length and theimaging view field size can be adjusted in real time, thus varying planar resolution, and enabling the system to be suitable for measurement requirements of more application scenes; the digital holographic surface three-dimensional topography measurement system comprises a single-wavelength digital holographic microscopic imaging mode, a dual-wavelength digital holographic microscopic imaging modeand a multi-wavelength digital holographic microscopic imaging mode, and the axial resolution can be changed by switching different light source modules.

The invention discloses a spatial non-cooperative target attitude evaluation method with image scale transformation, which comprises non-cooperative target boundary extraction, image scale transformation, a modular depth separable convolutional network and three-axis attitude output, and is characterized in that an algorithm comprises two parts of training and detection, the training process mainly utilizes attitude image data marked on the ground,. Related parameters of the algorithm network are trained by using a gradient descent algorithm. in the detection process, the trained parameters are utilized to evaluate the three-axis attitude corresponding to the non-cooperative target in an image for the input image. The invention gets rid of the limitation on the configuration of the non-cooperative target in the posture recognition process, extracts the deep features of images step by step through the modular deep convolutional network, and solves the problems that the feature points are difficult to extract stably and the illumination adaptability is poor in a conventional method.

The invention relates to the technical field of surveying and mapping, in particular to a land planning levelness measuring device with a self-balancing structure. The device comprises a self-balancing rack mechanism, two groups of vertical frame mechanisms and a measuring mechanism, the self-balancing rack mechanism is symmetrically provided with the two groups of vertical frame mechanisms, and the two ends of the measuring mechanism are fixedly connected with the two groups of vertical frame mechanisms respectively. The electric push rod is controlled to operate through the first laser transmitter and the two sets of photosensitive sensors, the function of adjusting the height of each corner of the U-shaped rack is achieved, self-balancing of the U-shaped rack is achieved, manual calibration is not needed, the accuracy of the levelness measurement result is optimized, and measurement is conducted through multiple lasers at the same time. If the laser coincidence phenomenon occurs, it is indicated that the measuring device is in a fault state, it is convenient for workers to check device faults, the upper gear is manually shifted to drive the anti-dazzling screen to rotate, three-gear adjustment of laser brightness is achieved, the measuring requirements under different light rays are met, and the practicability of the device is better.

The invention provides a steel structure residual stress measuring instrument and a using method thereof. The measuring instrument comprises a fixed measuring conical head, a sliding measuring conicalhead, a metal support, a dial indicator, a clamping support and a buffer spring system; the clamping support, the fixed measuring conical head and the buffer spring system are all fixed to the metalsupport, the dial indicator is laterally placed on the metal support, and the thickness of a dial plate is close to or equal to the width of the metal support. The sliding measuring conical head can freely slide in the measuring head sliding hole of the metal support, the left end of the sliding measuring conical head is connected with the measuring rod end of the dial indicator, and the right endof the sliding measuring conical head abuts against the buffer spring system. The measuring instrument is further provided with a standard hole distance ruler and a temperature correction ruler whichare the same in structure and size, the standard hole distance ruler serves as a reference ruler, and the temperature correction ruler is used for correcting the influence of temperature change on the to-be-measured small hole distance. The measuring instrument is simple in structure, and can accurately measure the residual stress near the joint of the plates; the measuring restoring force is small, the measuring conical head cannot deviate from the center of the measuring hole, and the measuring precision is not affected.

The invention relates to an automatic adjustment photoelectric sensor signal circuit based on a feedback system. A controller is connected to an LED driving circuit which drives a light emitting device to emit light. One side of the light emitting device is provided with a light receiving sensor. A light blocking device is arranged between a light receiving device and the light receiving sensor. After the light receiving sensor senses the light reflected by a wounded part, signal current is generated and is processed by a sensor signal processing circuit, a feedback circuit feeds a signal to a controller, and the controller adjusts the LED driving circuit according to the feedback signal to control the brightness of the light emitting device. According to the automatic adjustment photoelectric sensor signal circuit, through connecting the feedback circuit behind the light receiving sensor, the real-time adjustment can be carried out according to various environmental temperature changes in concrete detection, thus accurate data is measured, few peripheral devices are employed, the quality of a sensor output effective signal can be greatly improved, and the automatic adjustment photoelectric sensor signal circuit is adapted to measurement requirements in different environments.

The invention discloses a liquid level sensor prepared based on a plastic optical fiber macro-bending method, and relates to the field of plastic optical fibers and the technical field of liquid level sensing. The liquid level sensor is obtained by winding POF on the surface of a cylinder, and the cylinder is made of light modeling resin. The preparation method comprises the following steps: (1) preprocessing the POF end face to obtain a flat optical fiber end face; and (2) winding the POF on the surface of the cylinder according to a preset track, and fixing the POF through an adhesive. The method is simple to operate and high in measurement precision, and can adapt to the requirements of different resolutions by controlling the distance of each circle of optical fiber; the POF liquid level sensor has excellent electronic insulation and remote sensing performance, can perform safe measurement on flammable and explosive oil tanks, realizes point liquid level monitoring, and has the advantages of high sensitivity, quick response, electromagnetic interference resistance, small volume, light weight, corrosion resistance and the like.

The invention provides an anti-washout long-life liftable multi-point acquisition type thermocouple. The anti-washout long-life liftable multi-point acquisition type thermocouple comprises a connecting box, an insulating pipe, a sliding column and a fastening sleeve; the sliding column glidingly sleeves the insulating pipe, and only can slide along the axis of the insulating pipe; multiple elasticpressure plates are circumferentially arranged on the sliding column; the elastic pressure plates are distributed around the insulating pipe; furthermore, a gap exists between the elastic pressure plate and the insulating pipe; an installation plate is arranged on the fastening sleeve; an external thread is arranged on the outer circumferential surface of the sliding column; an internal thread isarranged on the inner circumferential surface of the fastening sleeve; furthermore, a pressure ring is also arranged on the inner circumferential surface; the fastening sleeve sleeves the sliding column in a threaded manner, wherein the elastic pressure plate is positioned in the pressure ring; when the fastening sleeve rotates, the elastic pressure plate slides along the sliding column, and is near the pressure ring; the pressure ring can extrude the elastic pressure plate at the same time; and thus, the elastic pressure plate is elastically deformed, and tightly abuts on the insulating pipe. By means of the device in the invention, endless adjustment of the measurement end of the thermocouple can be realized; and thus, measurement requirements can be well satisfied.