84results about How to "With self-calibration function" patented technology

The invention discloses a self-calibration device and method for measuring the parallelism of laser receiving and transmitting optical axes. The device comprises an analog echo source, a two-dimensional light beam pointing scanning unit, a system self-detection light path component, a receiving optical axis offset regulating unit and a light beam monitoring and data processing unit. The device and the method can meet measurement of coaxial or common-path laser receiving and transmitting coaxiality and can be used for measuring the parallelism of non-coaxial optical axes of different offsets. The device is mainly characterized by having a self-calibration function so that the state of the device can be monitored at any time and an optical axis offset adjusting function so that the parallelism test of optical axels of different offsets can be met, thereby being particularly suitable for calibrating and testing a laser positive photoelectric instrument.

Testing instruments for comparing two digital signals to obtain error data do not exist at present, and meanwhile, special calibrators for detecting electronic transformers outputting low voltage signals do not exist at present either. The invention discloses a calibrator which can be simultaneously applicable to detecting the electronic transformers and traditional transformers from multiple manufacturers. The calibrator is characterized in that digital signal input ends and analog alternating current signal input ends are arranged on the calibrator body; at least two digital signal channelsand at least two analog signal channels are installed in the calibrator body; the analog signal channels comprise programmable amplifying circuits, self-calibration circuits, high-speed frequency division sampling hold circuits and high-speed A/D measuring circuits; the digital signal channels comprise photoelectric signal conversion modules; and synchronizing signal generators and receivers are arranged between the signal channels. The calibrator can satisfy standard error tests of the traditional transformers and the electronic transformers simulating low voltage output and digital quantityoutput.

The invention relates to a split-core transformer and a split-core current meter, and relative self correct method of split-core current meter, wherein said split-core transformer comprises frame, iron core, detecting coil on the iron core, and correcting coil induced with detecting coil; the iron core can be separated into two semi bodies; said frame also comprises a device for controlling the combination and separation of two semi bodies; the split-core current meter has said split-core transformer and relative auxiliary circuit. Since it uses correcting coil, the split-core transformer and split-core current meter can pre-correct the error before detection.

The invention belongs to the technical field of measurement, and in particular relates to a composite material deflating rate test system with self calibration function and a method. The system comprises a dry pump, a molecular pump, an ultra high vacuum metal angle valve, a getter pump, small pores, a quadrupole mass spectrometer, a vacuum chamber, an extractor gauge, a composite vacuum gauge, a sample room and a capacitance diaphragm gauge. The system combines three material deflating rate test methods, an accumulation method, a dynamic flow method and a double path method, and can test gas flow within the range of 1Pam<3> / s-6* 10<-12>Pam<3> / S ( if the surface area A equals to 6000 cm<2>, deflating rate measurement limit reaches 1*10<-15>Pam<3> / (s cm<2>)). The system covers material deflating rate test range 13 orders of magnitude, adopts a symmetric structure in design, and improves test efficiency and data reliability; besides, the system has function of automatic calibration on the ultra high vacuum gauge, the mass spectrometer and gas micrometeor, and has characteristics of multiple functions and high degree of integration.

The invention discloses a fixed type flying ash sampling device of a coal-fired boiler. The fixed type flying ash sampling device comprises a sampling device, a cyclone separation and storage device, a fume flow measuring system and a heating device. The invention also provides a fixed type flying ash sampling method of the coal-fired boiler. The method comprises steps of: preheating and sampling a return gas pipeline and blowing sampling system pipelines. By utilizing the device and the system, the operation is simplified, and at the same time the characteristic that the flying ash sampling is good in representativeness is maintained, and sampling at a constant speed under different boiler loads is realized; and furthermore, the possibility that the flying ash is accumulated in the sampling pipeline is greatly reduced, the sampling system is large in fume pressure difference, and meanwhile the sampling pipeline is small in resistance, and thus the sampling system is good in adjustment performance.

The invention discloses a method used for determining the evapotranspiration of crops on site, belonging to the field of agricultural science and technology. The method comprises the steps as follows: data on soil water potential and soil volumetric moisture content of more than 5 layers of soil layers with different depths is measured on site in real time; wherein, at least one layer is below the root layer of the crops; a plurality of data pairs on unsaturated hydraulic conductivity-volume water content of all soil layers above the zero flux plane below the root layer are obtained when the zero flux plane exists below the root layer of the crops, thus obtaining the mathematical relationship of unsaturated hydraulic conductivity-volume water content of all soil layers, therefore, the water flux of all soil layers below the root layer can be obtained, thus determining the evapotranspiration by a water balance method. The method of the invention can be used for determining the evapotranspiration of the crops on site, destroys no soils, is convenient and precise, and can work out the evapotranspiration of the crops at the time interval without observing the zero flux.

The invention discloses a digital metro gauge dynamic detection system which includes an inspection trolley, a display, an information input terminal, a detection unit, a speed measuring unit, an alarm unit, a processor and a power supply, the display, the information input terminal and the detection unit are arranged on the inspection car, the speed measuring unit, the alarm unit and the processor are arranged in the inspection car, the power supply is used for power supply of the whole detection system; and the detection unit, the speed measuring unit, the alarm unit, the display and the information input terminal are respectively connected with the processor. The detection unit is used for detection of a tunnel section, the speed measuring unit is used for monitoring trolley speed, through preset limit information in a computer, mileage information can be automatically read, a corresponding clearance can be configured, automatic clearance switch can be realized, and by dynamic compensation algorithm in software, an accurate clearance can be measured even in movement.

The disclosed optical-fiber grating temperature measurer special to high-voltage power system comprises: an optical-fiber grating sensor, an optical coupler or optical ring device with the first-branch terminal connected to the broad-band optical source by fiber, the second-branch terminal connected to standard optical-fiber grating that connects with the public terminal of a 1*n optical switch with branch terminals linked to all measuring paths every with a sensor assembly, and the third-branch terminal connected to the demodulator with output end connected to a signal processing circuit.

The invention discloses an intelligent sample bottle lid pressing machine for sampling. The machine comprises a storage mechanism, a pushing block module, a translation jacking mechanism, a turnover correcting mechanism, a lid pressing mechanism and a detecting mechanism; the storage mechanism is used for storing multiple bottle lids; the pushing block module is arranged below the storage mechanism for horizontally pushing the bottle lids output by the storage mechanism onto the translation jacking mechanism one by one; the translation jacking mechanism has a translation travel for translation conveying of the normal bottle lids with downward openings output by the storage mechanism below the lid pressing mechanism for lid pressing; the turnover correcting mechanism and the detecting mechanism are both arranged above the translation jacking mechanism; the turnover correcting mechanism is used for overturning and correcting the abnormal bottle lids with upward openings on the translation jacking mechanism; and the detecting mechanism is used for detecting the bottle lids on the translation jacking mechanism and blowing away the unqualified bottle lids. The machine has the advantages of simple and compact structure, high intelligent degree, high reliability, high lid pressing safety and high working efficiency.

The invention discloses a device and a method for measuring non-contact gaps. The method is used for measuring the three degrees of freedom of a gap formed between the lower surface of an upper measured object and the upper surface of a lower measured object. Measuring sensors are mounted on the upper measured object in a non-collinear three-point manner, measuring directions of the measuring sensors are perpendicular to the lower surface of the upper measured object, and zero positions of the measuring sensors are adjusted to coincide with the lower surface of the upper measured object. Three distances between laser emitting points on the lower surface of the upper measured object and corresponding laser reflecting points on the upper surface of the lower measured object are measured, and the three degrees of freedom between the lower surface of the upper measured object and the upper surface of the lower measured object can be obtained via algorithm processing. The method can be used for pose position measurement and regulation of an immersion unit mounted on a movement platform in immersed photoetching, can also be used for measuring pose position in a three-dimensional space, and is especially applicable to precise measurement for narrow gaps.

The invention discloses an automatic calibration system and method based on an LVDT sensor. The system comprises a constant-frequency constant-amplitude signal generation unit, a channel gating and LVDT driving unit, an access gating low-noise pre-amplification unit, a programmable gain unit and a microprocessor unit, wherein the output end of the constant-frequency constant-amplitude signal generation unit is connected with the input end of the channel gating and LVDT driving unit; the output end of the channel gating and LVDT driving unit is connected with the input end of the access gatinglow-noise pre-amplification unit; the output end of the access gating low-noise pre-amplification unit is connected with the input end of the microprocessor unit; the output end of the microprocessorunit is connected with the input end of the channel gating and LVDT driving unit and the input end of the programmable gain unit; and the output end of the programmable gain unit is connected with theinput end of the access gating low-noise pre-amplification unit.

The present invention provides a miniature automatic correction and restructuring device comprising a restructuring pin and a restructuring hole fixed together; the inside of the restructuring pin is equipped with a CMOS camera which is fixed with a robot module by a connection; the restructuring hole is fixed with another robot module and a locking pin driven by memory alloy is equipped in the restructuring hole in radial direction; the locking pin driven by the memory alloy comprises a sliding pin, a return spring equipped under the sliding pin and a memory alloy spring; both ends of the memory alloy spring are connected with copper based electric connections; the upper end is fixed with the sliding pin and the lower end is fixed with the restructuring hole. The restructuring pin is fixed with one robot module by a connection and the restructuring hole is fixed with another robot module; when the two robot modules are butted, with the automatic correction function of the pin and hole, the robot poses can be adjusted to make the central lines of the restructuring pin and hole aligned approximately; after the relative motion of the two modules, the pin and hole are cooperated and the locking pin locks the restructuring pin to realize butt restructuring.

The invention discloses a self-calibrating putting-into-type pressure liquid level meter which comprises a shell and a cable, wherein a main sensor and an auxiliary sensor are arranged in the shell; the cable is connected to the main sensor and the auxiliary sensor; the main sensor is arranged below the auxiliary sensor; and the vertical distance between the main sensor and the auxiliary sensor is a. The self-calibrating putting-into-type pressure liquid level meter provided by the invention has the advantages of self-calibrating function, accurate measuring result, low cost, simple structure, convenience in use and suitability for various occasions.

The invention discloses a microphone with a self-calibration function, a calibration method thereof, a sound transmission system and a sound detection system. The microphone comprises a microphone body and a self-calibration unit installed on the microphone body. The self-calibration unit comprises a second shell and a self-calibration diaphragm mounted on the shell, the self-calibration diaphragmand a sound transmission diaphragm of the microphone body are arranged at an interval to form a capacitor, and the second shell is provided with an excitation electrode input terminal used for inputting alternating-current excitation voltage to the self-calibration diaphragm; the sound transmission system and the sound detection system comprise the microphone. The calibration method comprises thestep of recording a voltage effective value U2 between the sound transmission diaphragm and the back polar plate as the sensitivity of the microphone when the voltage effective value of the alternating-current excitation power supply is U1. The method does not need to manually calibrate the microphone, is suitable for an acoustic online monitoring device, can greatly reduce the workload of noisedetection personnel, improves the noise detection efficiency and precision, and is convenient and quick in calibration.

The invention belongs to the test technology field and relates to an ultrahigh-precision acceleration meter batch performance test system. The system comprises an isolation foundation 1, an automatic rotary table 2, a signal acquisition device 3, a temperature control box and a fixing clamp 4, a multi-path I/U converter 5, a constant temperature oil groove 6, a single-patch I/U converter 7, a filter 8, a high-precision digital voltage meter 9, a sequence controller 10, a precise constant current source 11, an AV purifying stabilized power source 12, a multi-path AC/DC DC power source 13, a computer 14 and an acceleration meter product 15.

The invention discloses a laser positioning system which includes a control module used for controlling the operation of other modules, a laser positioning module used for positioning a target, an operation module used for data input, a wireless transceiver module used for being connected with other remote terminals, a data storage module used for storing collected and processed data, a positioning execution module used for issuing an executing instruction according to a positioned target, a motor driving module used for receiving the instruction issued by the positioning execution module andconverting the instruction into an actual action, and a position feedback module used for making signal feedback for a changed position. The invention further presents a positioning method of the laser positioning system, which includes the following steps: S1, starting a laser positioning module; S2, starting a positioning execution module; S3, positioning; and S4, calibration. The laser positioning system of the invention has high work efficiency and high positioning accuracy, has a self-calibration function, is quick in laser output, and is suitable for popularization.

The invention discloses an online sampling device and an online sampling method for an X-ray fluorescent spectrograph. The device comprises a sampling pool main body, a motion guide rail, a fixed mass block, a bearing, an overflow pipe, a correcting baffle, a correcting sheet, a test through hole, a sample storage groove, a thin soft rope, a float bowl, a sample inlet pipe, a sample outlet pipe, an inlet valve and an outlet valve. By using the device and method provided by the invention, the online sampling and test of liquid samples are realized, the test efficiency is increased, and the labor intensity of worker is relieved. By adjusting the position of the correcting baffle through gravity and buoyancy, the use of electronic elements is avoided. The device has high safety performance and can be used for testing inflammable and explosive petroleum products. Since the height of the overflow pipe is adjustable, the height of liquid level is adjustable, and further, the distance between an X-ray probe and a sample is adjustable; therefore, the device has certain flexibility in test.

The invention relates to an underground flow control valve based on fiber bragg grating sensing detection. The underground flow control valve comprises a computer control system, a power supply, a motor driving system, an execution mechanism and a fiber bragg grating detection system, wherein the motor driving mechanism, the execution mechanism and the fiber bragg grating detection mechanism form a flow control valve; the computer control system is connected with the power supply; the power supply is connected with the execution mechanism through the motor driving system; and the execution mechanism is connected with the fiber bragg grating system. The underground flow control valve based on fiber bragg grating sensing detection provided by the invention has strong antijamming capacity, adopts an absolutely real-time measuring method, has a self-correction function, enables a good repeatability of the measurement result, and reduces the driving force of the driving system.

The invention provides a laser scattering oil fume monitor. A laser beam is split into a detection beam and a correction beam through a beam splitter. The detection beam is used for detecting the oilfume concentration. The correction beam is used for correcting the intensity of the light source. A detection part of the laser scattering oil fume monitor is installed outside a smoke discharge pipeso that the influence caused by high temperature and high humidity oil fume substances in the smoke discharge pipe is avoided and the service life of a sensor is prolonged. The laser scattering oil fume monitor is less affected by the site environment and has the strong anti-pollution capability and a self-correction function. The dual optical path system can self-correct the light intensity fluctuation of the light source caused by environmental change and ensure the accuracy of the detection results.

The invention discloses a multi-channel self-adaptive high-precision LVDT data acquisition and measurement system and method. The system comprises a constant-frequency constant-amplitude signal generation unit, a channel gating and LVDT driving unit, an access gating low-noise pre-amplification unit, a programmable gain unit, a true virtual value rapid sampling unit, a motion direction discrimination unit and a microprocessor unit. The constant-frequency constant-amplitude signal generation unit is connected with the channel gating and LVDT driving unit; the channel gating and LVDT driving unit is connected with the access gating low-noise pre-amplification unit; the access gating low-noise pre-amplification unit is respectively connected with the true virtual value rapid sampling unit andthe motion direction discrimination unit; the true virtual value rapid sampling unit and the motion direction discrimination unit are respectively connected with the microprocessor unit; the microprocessor unit is respectively connected with the channel gating and LVDT driving unit and the programmable gain unit, and the programmable gain unit is connected with the access gating low-noise pre-amplification unit.