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

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 a measuring tape fixing device which comprises a positioning base and a rotary arm pivoted on the positioning base and provided with a measuring tape end hook positioning component. The measuring tape fixing device is fixed by the aid of the positioning base, a measuring tape end is fixed by the measuring tape end hook positioning component, and rotating angle is adjusted by the aid of the rotary arm, so that the measuring tape fixing device can meet measuring requirements of different angles.

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 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 an optical path switching apparatus used in a large spray field laser particle analyzer, and a use method thereof. The apparatus comprises pedestal columns, a rotary middle shaft, shading sleeves, optical path centralizers, fastening bolts and shading sleeve columns, wherein the pedestal columns and the rotary middle shaft are arranged in a two end fitting manner to make the rotary middle shaft freely rotate under the supporting of a pedestal at two ends; the optical path centralizers and the rotary middle shaft are arranged in a fitting manner through fit holes to make the optical path centralizers freely rotate on the rotary middle shaft; all rotation fitting positions are provided with the fastening bolts, and the fastening bolts are fastened when rotating parts reach proper positions to fix the rotating parts; and the shading sleeves are fixedly arranged on the rotating middle shaft through the columns, and rotate with the rotary middle shaft. The apparatus and the split spray field laser particle analyzer are used in a fitting manner, so rapid switching between background test and sample test can be conveniently realized; and more importantly, sampling measurement of the local spray area of a large spray field can be carried out, so the problem of too high droplet granularity measurement concentration of the large spray field is effectively solved.

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 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.