34results about How to "Solving accurate measurements" patented technology

The portable non-destructive plant pigment detecting system includes three wavelength spectral measurement device with oppositely set light source and detector, neutralized reference sample or leaf to be measured, micro controller connected to the light source and the detector, serial port circuit connected electrically to the micro controller, and display and keyboard connected electrically to the micro controller too. The detection method includes detecting data I0 and I, calculating the fresh leaf transmission T= I / I0 of different wavelengths, and calculating the plant pigment content ChI in the leaf in chemical metering algorithm. Compared with traditional wet chemical method, the present invention has decades times raised efficiency and no production of environment harming matter.

The invention discloses a gas-liquid two-phase flow phase-inversion heat circulating system. A pure liquid treated by an ion liquid preparation device and a deaerator enters a steam generator to produce saturated steam which enters a steam super-heater through a pressure reducing valve so as to form super-heated hot steam with dryness of 1, the super-heated dry steam is quantitatively humidified by a humidifying desuperheater to form gas-liquid two-phase flow which enters a temperature fine regulator so as to heat to a predetermined temperature and then enters a heat exchanger so as to heat into super-heated steam, the super-heated steam then enters a cooler so as to be completely condensed into liquid, the liquid enters a condensate storage box, the liquid in the condensate storage box is conveyed to the steam generator by virtue of a liquid variable-frequency circulating pump, the steam generator is communicated to the humidifying desuperheater by virtue of a humidifying variable-frequency pump, various sensors are arranged in each link, and an electrical control part is electrically connected with a controller. The gas-liquid two-phase flow phase-inversion heat circulating system has the beneficial effects that the temperature, the pressure, the flow rate and the dryness of the gas-liquid two-phase flow can be precisely controlled and measured.

The invention relates to a novel crude oil condensation point measurement device and a measurement method thereof. The novel crude oil condensation point measurement device comprises an X-ray emission device, a real-time image receiving and processing device, a tank body, a liquid tank, a condensation point test tube, a rotation driving device and a computer terminal control platform, wherein the liquid tank is located between the X-ray emission device and the real-time image receiving and processing device, and the real-time image receiving and processing device is connected with the computer terminal control platform; a temperature sensor is fixed in the condensation point test tube, and another temperature sensor is fixedly mounted in the liquid tank; the two temperature sensors are connected with corresponding signal converting and processing devices which are respectively connected with corresponding data acquisition cards, and the two data acquisition cards are both connected with the computer terminal control platform; the X-ray emission device, the rotation driving device and a heating-refrigerating liquid circulator are all connected with the computer terminal control platform. The novel crude oil condensation point measurement device and the measurement method thereof improve the condensation point measurement accuracy.

The invention relates to a friction-wear test device for a double cone shaft sleeve type self-lubricating joint bearing bush. Taper corresponding sleeves separately sleeve the two cone bodies of a double cone shaft; a flange which is integrally connected with the taper sleeve and shares the same end surface is arranged on each of the taper sleeves; 3-8 through holes are uniformly distributed in each of the flanges; the inner end surfaces of the two cone shafts are in separate contact with the two end surfaces of a precise isolating sleeve; the inner diameter of the precise isolating sleeve sleeving outer side of the middle of the double cone shaft is greater than the diameter of a cylinder portion of the double cone shaft, and the outer diameter is smaller than or equal to that of a cylindrical base body of each of the taper sleeves; concentric locating sleeves are arranged on the outer peripheral surfaces of the precise isolating sleeve and taper sleeves on two sides; an axial throughhole which corresponds to the through hole of the flange of each of the taper holes and is coaxial to the same is formed in a ring-shaped body of each of the concentric locating sleeves; and a screwpenetrating through each of the through holes of the concentric locating sleeves also penetrates through the through hole on the flanges of the two cone sleeves and is fastened by a nut. The device provided by the invention not only can simulate the actual bush working condition in a bearing well, but also can change the initial working condition conveniently. After the test, the device is conveniently detached and analyzed, and can support precise detection of the test.

The invention discloses a liquid specific heat capacity measurement system which comprises a liquid flow circulation module, wherein the liquid flow circulation module comprises a sample container, a flow pump, a calorimeter, a cooler and an expansion box, wherein the sample container is connected with the flow pump through a conveying tube, the flow pump is connected with the calorimeter through a conveying tube, the calorimeter is connected with the cooler through a conveying tube, the cooler is connected with the expansion box through a conveying tube, the expansion box is connected with the flow pump through a conveying tube, and an electromagnetic valve is arranged on the conveying tube between the expansion box and the flow pump. The liquid specific heat capacity measurement system has the beneficial effects that the specific heat capacity of a liquid at high temperature is measured, the resolution of temperature measurement is high, the temperature control is accurate, the heat loss is reduced to the greatest extent, the uncertainty of measurement is reduced, the accuracy of a testing result is improved, and the scope of application is expanded.

The invention relates to a large-capacitance tracing circuit and a tracing method. The large-capacitance tracing circuit is characterized by comprising a dual-path signal source U1 and U2, a null indicator, a shunt and a dual-path data acquisition system, wherein the first path of signal source U1 of the dual-path signal source is connected with a first driving and isolating circuit A1; the second path of signal source U2 is connected with a second driving and isolating circuit A2; output ends of the first driving and isolating circuit A1 and the second driving and isolating circuit A2 are connected with one end of a tested capacitor and one end of the shunt; the other end of the tested capacitor and the other end of the shunt are connected with the signal end of the null indicator; the output end of the first driving and isolating circuit A1 or the second driving and isolating circuit A2 is also connected with a reference end of the null indicator; and two paths of the dual-path data acquisition system are respectively connected onto two ends of the tested capacitor and the shunt.

The invention discloses an accounting method of residue rate of large earthwork. The accounting method comprises the following steps: firstly, measuring and calculating the stacking density of muck, selecting a level ground with a flat surface inside a slag discharge field of requiring measuring the volume, digging out a pit with fixed depth; paving a plastic film in the dug pit; fully filling the dug pit by accurately metered water, so as to ensure that the water level is flush with the outer surface of the pit; and counting the net amount of the water poured into the pit. The volume of the muck is equal to the volume of the water, so that the stacking density of the muck is equal to the result of the mass of the muck divided by net weight of the water; then the residue rate is measured and calculated; the mass ratio of the residue rate is equal to the ratio of the mass of waste slag and the sum of the mass of qualified stones and the waste slag; the volume ratio of the residue rate is equal to the ratio of the volume of the waste slag and the sum of the volume of the qualified stones and the volume of the waste slag. By adopting the accounting method, the technical problem that the stacking density and the natural density of the waste slag are accurately measured by a field test measurement method so as to accurately calculate the residue rate can be solved.

The invention discloses an integrating sphere detector which comprises a hollow spherical shell, an incidence hole and a sampling hole. The incidence hole and the sampling hole are arranged on the hollow spherical shell. The integrating sphere detector further comprises a cooling device. The cooling device attached to outside of the hollow spherical shell is used for cooling the hollow spherical shell. The integrating sphere detector is applicable to measurement of various types of optical parameters, especially parameters of light with large divergence angle and high power, such as laser and other high-power light sources. Optical signals obtained are homogenized, and accordingly accurate measurement of optical parameters of multiple light emitters can be achieved.

The invention belongs to the field of acoustic measurement, and in particular relates to a method for measuring the average sound absorption coefficient of the wall of a reverberation pool, comprising the following steps: measuring the radiated sound power level SWL of a standard spherical sound source; measuring the spatial average sound pressure of a standard spherical sound source of the reverberation pool class <spl>; Measure the average sound absorption coefficient of the wall of the reverberation pool. The measurement method of the present invention is simple, easy to operate, and the experimental effect is obvious and easy to evaluate; compared with the method of measuring the sound absorption coefficient of the material by measuring the reverberation time in the reverberation chamber, the present invention simultaneously measures 128 points and performs spatial The measurement results are obtained by averaging, with higher efficiency and lower uncertainty; the invention solves the problem of accurate measurement of the average sound absorption coefficient of the reverberation pool wall, which is useful for understanding the pool constant of the reverberation pool and completing the calibration of the reverberation pool important meaning.< / spl>

The invention provides a method for adjusting a horn mouth of circle shears by applying an orthogonal method. The method comprises the following steps of: building a central line of a unit; leading two vertical lines from the central line; making an oscillating bar; fixing the oscillating bar at one side of a shear blade shaft of a left circle shear; fixing an inside micrometer at an upper end of a vertical rod of the oscillating bar; rotating the shear blade shaft of the circle shears to measure; reading and recording reading value of the inside micrometer; measuring the other side of the shear blade shaft of the circle shears and the shear blade shaft of another circle shear according to the steps; and comparing read and recorded reading values, if the reading value error of the inside micrometer is larger than a range, repeatedly measuring and adjusting until a standard error requirement is reached. By the method, a horn mouth state of two circle shears can be accurately and rapidly measured and adjusted, the problems of accurate measurement and accurate adjustment on the horn mouth state of a shear blade of a double-head circle shear are effectively solved, the shear blade is prevented from being damaged, the shearing edge quality is improved, and waste quantity and quality problem of products are reduced.

The invention relates to a heterodyne laser interference angle vibration measuring device and method, and belongs to the technical field of photoelectric measurement. The device comprises a polarization laser (1), a spectroscope (2), a first right-angle prism (2), an acoustic-optical modulator (4), a first reflection mirror (5), a second reflection mirror (6), a second right-angle prism (7), a third reflection mirror (8), a fourth reflection mirror (9), a grating (10), a lens (12), a fifth reflection mirror (13), a sixth reflection mirror (14), a photoelectric converter (15), a data collecting system (16) and a computer (17). The heterodyne laser interference angle vibration measuring device and method is characterized in that a model segment smaller than a carrier cycle is used for digital frequency demodulation of a vibration laser Doppler signal waveform with a low signal-to-noise ratio and a non-stationary angle, and therefore an angular vibration velocity waveform and an angular vibration acceleration waveform are obtained.