11results about How to "Measurement data is stable" patented technology

The utility model provides a train speed measuring device. The train speed measuring device comprises a main body support, Hall sensors are arranged at the two ends of the main body support, a plurality of fixing mechanisms are arranged on the main body support, and the fixing mechanisms are used for fixing the main body support to a railway track. The train speed measuring device provided by the utility model has the advantages that the train speed measuring device has a portable main body structure, can be conveniently and quickly fixed on steel rails of various models during use, is stable and accurate in measured data and high in measuring speed, can obtain speed data in real time, and can continuously measure for multiple times.

This invention relates to the field of track slab measurement, and discloses a portable track slab flatness measuring device and method. The device includes a track base, a track web at the upper end of the track base, and a track head at the upper end of the track web. Two sets of splicing clamping assemblies are provided on both sides of the upper end of the track head. One set of splicing clamping assemblies has a connecting plate at its upper end, and a laser detector at its upper end. The other set of splicing clamping assemblies has a connecting plate at its upper end, and a laser emitter at its upper end. Both sets of splicing clamping assemblies have electric wheels at their bottoms. The track base, track web, and track head are integrally formed. In this invention, the splicing clamping assemblies adopt a symmetrical clamping structure, eliminating the need to push them in from the end face of the track slab. They can be directly clamped and fixed at any position on the track head, solving the problem of limited installation position in existing devices. This facilitates accurate detection of local defects in the track slab and significantly improves detection flexibility.

The invention relates to a portable tree health degree detection device and method, the portable tree health degree detection device comprises a measurement assembly, a probe and a controller, the measurement assembly comprises supporting and fixing units and flexible telescopic units, and the multiple supporting and fixing units are mutually connected through the flexible telescopic units to form a closed-loop structure; the adjusting block is sleeved in an adjusting hole in the adjusting plate in a sliding manner and can be locked; the supporting sleeve is fixed to the adjusting block in a penetrating mode, and the inner end of the supporting sleeve extends into the closed-loop-shaped structure so that a plurality of positioning supporting points which surround the periphery of the trunk and are adjustable in position can be formed. The outer end of the supporting sleeve faces outwards, internal threads are arranged in the supporting sleeve, and the probe is assembled in the supporting sleeve in a threaded mode and penetrates into a positioning supporting point formed by the supporting sleeve and the periphery of a tree trunk in a threaded propelling mode. The device is simple and rapid to operate and clear in result, the growth health condition of the tree is reflected by measuring the change condition of the physiological signal of the tree trunk, and the measurement precision and accuracy are improved.

The utility model belongs to the technical field of boiler flue gas desulfurization, and discloses a device for measuring the pH value and density of desulfurization slurry, the device comprises a sampling inclined pipe, an inlet valve, a pH meter, a mass flowmeter, an outlet valve, a sample discharging inclined pipe and a measuring pipeline, the upper end of the sampling inclined pipe is communicated with the side wall of an absorption tower slurry pool, and the lower end of the sample discharging inclined pipe is communicated with the side wall of the absorption tower slurry pool; the upper end of the measuring pipeline is connected with the lower end of the sampling inclined pipe, and the lower end of the measuring pipeline is connected with the upper end of the sample discharging inclined pipe; an inlet valve, a pH meter, a mass flow meter and an outlet valve are sequentially arranged on the measuring pipeline from top to bottom; and a side-entering stirrer is mounted at the lower part in the absorption tower slurry pool. The measuring pipeline is vertically arranged, so that solid particles in the slurry are not deposited; small pressure difference is generated between a low-pressure area on the back of the stirrer and an inlet, so that slurry flows at a low speed, and measured data are stable; the sample discharging inclined pipe is fixedly connected to the bottom wall plate of the absorption tower slurry pool, slurry is not discharged, and environment friendliness is achieved.

This invention provides a method for virtual digital lofting and real-time calibration of installation pose of a guide rail, comprising: providing at least two positioning fixtures, each fixture having three collinear optical markers symmetrically arranged on both sides relative to the center marker; fixing the two positioning fixtures to the upper and lower ends of the guide rail respectively, so that the positioning fixtures are in close contact with the two working surfaces of the guide rail; acquiring the global coordinates of all optical markers in real time through a motion capture camera array, and independently calculating the six degrees of freedom pose deviation of the guide rail based on a coordinate comparison scheme corresponding to the layout of the positioning fixtures: calculating the horizontal translation deviation of the upper end of the guide rail; calculating the tilt angle deviation of the guide rail in the vertical plane; calculating the rotation angle deviation of the guide rail about its own length axis by using the coordinate difference of the two markers on both sides of the same positioning fixture on a single coordinate axis; and making targeted adjustments to the installation state of the guide rail according to the calculated pose deviations of each degree of freedom, thereby completing real-time calibration.

The utility model discloses a three-point type internal caliper gauge, which comprises a first support leg, a second support leg and a measuring assembly, the measuring assembly comprises contact pins, a pin shaft, a dial indicator and a screw rod, the side wall of the first support leg is fixedly connected with the contact pins, the side wall of the second support leg is symmetrically and fixedly connected with two contact pins, and the pin shaft is fixedly connected with the dial indicator. The first supporting leg and the second supporting leg are rotationally connected through a pin shaft, a dial indicator is embedded in the side wall of the second supporting leg, a screw is in threaded connection with the side wall of the second supporting leg, the side wall of the screw is sleeved with a spring, one end of the spring is fixedly connected with the side wall of the second supporting leg, and the other end of the spring is fixedly connected with the side wall of the second supporting leg. And the other end of the spring is fixedly connected with the side wall of the screw rod. The three contact pins abut against a workpiece, fixation is more stable, sliding is not prone to occurring, measured data are more stable, the first supporting foot is pushed to rotate around the pin shaft by rotating the threaded rod and cooperating with the spring, then measurement is carried out, and measurement errors caused by operation of different measurement personnel are avoided.

The present invention relates to a test hole calibration device and calibration method for an ultra-micro spectrophotometer, wherein the ultra-micro spectrophotometer to be calibrated comprises an upper base and a lower base, an upper movable base is mounted on the upper base, a lower movable base is mounted on the lower base, an upper test hole is provided on the upper movable base, a lower test hole is provided on the lower movable base, and the diameters of the upper test hole and the lower test hole are equal and relatively arranged. The calibration device comprises a locating pin for inserting into the upper test hole and the lower test hole, and the diameter of the locating pin is equal to the diameter of the upper test hole. Aiming at the problem of misalignment of the upper and lower bases in the existing ultra-micro spectrophotometer, the present invention adopts a mechanical locating pin to calibrate the upper and lower bases, and takes the locating pin smooth and not stuck as effective calibration, so that the upper test hole and the lower test hole are concentric, which is convenient for alignment when installing the optical fiber, and the coaxial deviation value is within the range of 0.06mm, thereby improving the stability and accuracy of the spectrophotometer.

The utility model discloses a magnet clamping device which comprises an installation seat and a plurality of sets of clamping assemblies arranged on the installation seat, each set of clamping assembly comprises a sliding block, a fixing block and a pressing mechanism, guide sliding grooves are formed in the installation seat, the number of the guide sliding grooves is the same as that of the clamping assemblies, and one sliding block is arranged in each guide sliding groove in a sliding mode. A fixing block is arranged at the position opposite to the sliding direction of the sliding block, the fixing block is fixedly installed on the installation base, two first clamping jaws are arranged on the sliding block in a protruding mode, two second clamping jaws are arranged on the fixing block in a protruding mode, the first clamping jaws and the second clamping jaws are opposite, and a magnet clamping space is formed between the first clamping jaws and the second clamping jaws; the pressing mechanism is connected with the sliding block to press the sliding block to slide towards the fixed block. When in use, the sliding block moves backwards linearly along the guide sliding chute, so that the first clamping jaw is far away from the second clamping jaw of the fixed block, then the tested magnet is contacted with the second clamping jaw of the fixed block, and finally, the second clamping jaw and the first clamping jaw clamp and fix the tested magnet together, and the scheme is simple to clamp the magnet, improves the working efficiency and reduces the workload.

The invention provides an answer validity judgment method based on a multi-modal signal, which belongs to the technical field of medical treatment, and comprises the following steps: collecting brain wave data of a testee by using a data acquisition device, extracting a P300 component in the brain wave data, judging whether the extracted P300 component is taken as a validity mark or not based on the extracted P300 component, and judging whether the P300 component is taken as the validity mark or not. The method comprises the following steps: selecting physiological data corresponding to a P300 component, carrying out correlation analysis on the physiological data and the P300 component, selecting data with a correlation coefficient greater than or equal to 0.5 as an input variable, constructing a neural network model, carrying out model training, selecting a neural network to construct an identification model for training, and inputting the collected data into the model for prediction after the model is trained. The problem that a lie detection mechanism as an objective evaluation method still has the defects of poor applicability, weak effectiveness, long evaluation time and the like is solved.

The invention discloses a device and method for measuring the spatial size during waveguide right-angle butt joint, and the device comprises a horizontal support, a vertical support, a cross slide block, a gauge stand, a top block, a micrometer head, a screw, a screw, and a positioning pin. During measurement, a lower flange plate of the measurement device is contacted, aligned, and fastened with a flange plate of a right-angle butt joint waveguide; and rotating the micrometer head to drive the cross slide block to vertically and horizontally slide until the right flange plate is contacted and aligned with the other flange plate of the right-angle butt joint waveguide, respectively recording the expansion and contraction amount of the micrometer head, and adding the initial values of the horizontal zero position and the vertical zero position of the measurement device to obtain the measurement value of the spatial size during waveguide right-angle butt joint. The method can be used for measuring the spatial size during right-angle butt joint of waveguides with the precision below IT8 level, is quick in measurement and stable in data, and is not limited by the size of a waveguide connection system. The measuring device and the measuring method can be widely applied to the measurement of the spatial size during right-angle butt joint of various types of waveguides.

The utility model relates to the field of flue gas treatment, in particular to a dehumidification and ammonia removal device in a desulfurization and denitrification waste gas collection process, which comprises an acquisition probe connected with a flue gas dehumidification and ammonia removal system, the flue gas dehumidification and ammonia removal system is connected with a CEMS (continuous emission monitoring system), the CEMS is connected with an air compressor, the air compressor is connected with an oil-water separator, and the oil-water separator is connected with the flue gas dehumidification and ammonia removal system. The smoke dehumidification and ammonia removal system comprises a filtering system, the filtering system is connected with a dew-point meter, the dew-point meter is connected with a one-way valve, the one-way valve is connected with a first tee joint, the first tee joint is connected with a CEMS system, the other end of the first tee joint is connected with a three-way valve of the filtering system, and a fourth tee joint of the filtering system is connected with a jet pump through a third tee joint. According to the device, moisture, acid mist and ammonia gas in the flue gas are effectively removed, ammonia salt crystallization and pipeline corrosion are reduced, and measured data of a CEMS online system are real and stable. The system can regularly perform back flushing on the pipeline, discharge water in the pipeline and adsorb ammonium salt crystals.