40results about How to "No calibration required" patented technology

The invention provides a nondestructive detection method and device for absorber absorption coefficient measurement and photoacoustic imaging simultaneously. The detection method comprises the steps that optical fibers are adopted to perform opto-acoustic excitation in a body through a tissue channel; upper and lower boundary opto-acoustic signals P1 and P2 and a time interval D of an absorber are obtained by utilizing a focusing-type ultrasonic transducer with a long focal region in a nondestructive mode; according to the absorption coefficient a of the absorber and the relation of opto-acoustic pressure amplitude ratio P2/P1 of upper and lower boundaries of the absorber and thickness 1, the absorption coefficient a is inversed; an opto-acoustic image of the absorber is obtained while linear scanning of the transducer is combined. The detection device comprises an opto-acoustic excitation portion based on dispersing optical fibers, an electrical control mechanical scanning portion and an ultrasonic acquisition and processing portion based on the water-immersed focusing-type ultrasonic transducer with the long focal region. The detection method can achieve opto-acoustic excitation and opto-acoustic signal acquisition in a nondestructive mode, the influence of the energy flow rate relevant to wave length is overcome, result correction is not needed, and two-dimensional opto-acoustic imaging of the absorber can be performed simultaneously. The detection device is simple, easy, simple and convenient to operate and convenient to popularize clinically.

The invention provides a wavelength modulation optical fiber acoustic sensor which comprises a laser, an optical fiber FP (fabry-perot) interference cavity acoustic probe, a first photoelectric detector and a signal processing and controlling module, wherein a laser power supply provides driving current to the laser, and the wavelength of the laser can be continuously adjusted; laser emitted by the laser is reflected after entering the optical fiber FP interference cavity acoustic probe, and an optical signal is output; the first photoelectric detector is used for receiving the optical signal output by the optical fiber FP interference cavity acoustic probe; the signal processing and controlling module is used for determining the optimal working wavelength of the wavelength modulation optical fiber acoustic sensor according to a direct current component of the output signal of the first photoelectric detector, and regulating the output wavelength of the laser to be the optimal working wavelength of the wavelength modulation optical fiber acoustic sensor by controlling the laser power supply to apply a driving current value corresponding to the optimal working wavelength to the laser. When the wavelength modulation optical fiber acoustic sensor is used, the optimal working wavelength is automatically selected without manual operation and calibration, so that the wavelength modulation optical fiber acoustic sensor is convenient to use and high in environmental adaptability.

The invention provides a downhole formation porosity determination method. The method comprises the steps that the rock framework longitudinal wave slowness at the downhole set depth is determined according to the formation mineral volume content; the formation longitudinal wave slowness and formation transverse wave slowness at the downhole set depth are extracted according to array acoustic wave logging data; the formation porosity at the downhole set depth is determined according to the rock framework longitudinal wave slowness, the formation longitudinal wave slowness and the formation transverse wave slowness at the downhole set depth. According to the downhole formation porosity determination method, the formation porosity value is determined by adopting both the formation longitudinal slowness and the formation transverse wave slowness, the downhhole formation porosity can be precisely obtained, the obtained formation porosity value does not need to be corrected, the utilization rate of the array acoustic wave logging data is increased, and the accuracy of the formation porosity value is improved.

The invention discloses a temperature sensor for the interior of an oil immersed transformer. The temperature sensor comprises an optical fiber, an optical fiber connector arranged at the first end of the optical fiber, a thermosensitive element packaged at the second end of the optical fiber, a first protective sleeve and a second protective sleeve. The outer periphery of the second end of the optical fiber is sleeved with the first protective sleeve, the other outer peripheries of the optical fiber are sleeved with the second protective sleeve, and the first protective sleeve is provided with multiple through holes which are through in the radial direction. The invention further discloses a manufacturing method of the temperature sensor for the interior of the oil immersed transformer. The temperature sensor is small in size, simple in structure and high in reliability, structural damage, precision reduction and other situations are avoided, the requirements that the temperature sensor is embedded into a winding or an iron core can be well met, and the temperature of the interior of the oil immersed transformer is convenient to monitor.

The invention provides a submerged-arc welding technology for 304L stainless steel thick plates. The submerged-arc welding technology comprises the steps that firstly, welding grooves are machined; secondly, preparation before welding is carried out; thirdly, welding is carried out, wherein a welding trolley is adopted for carrying out priming coat welding on the grooves in the front surfaces, andthen front surface submerged-arc welding is carried out after priming coat welding is completed; the two 304L stainless steel thick plates with the front surface submerged-arc welding completed are turned over, and then plasma carbon arc air gouging back chipping is carried out on the grooves in the back surfaces; and the welding trolley is adopted for carrying out back surface submerged-arc welding on the back surface grooves with back chipping completed; and fourthly, postweld treatment is carried out. According to the submerged-arc welding technology for the 304L stainless steel thick plates, according to the components and the performance of 304L stainless steel, the dimensions of the welding grooves and the welding technology are optimized, and welding materials are reasonably matched to ensure the quality of welded joints, defects such as shrinkage distortion, slag inclusion, air holes and bulky crystal particles are avoided, good mechanical performance at minus 20 DEG C is achieved, and good low temperature impact toughness is achieved especially.

The invention belongs to the technical field of quality analysis and particularly discloses a quality analysis method based on the restricted theory of relativity and a mass spectroscope. The method comprises the following steps of: introducing irons of an object to be measured into an iron source area; accelerating the irons to 3*105m/s or more by using an accelerating electric field; introducing the irons into a field-free flying area to freely fly; introducing the irons into an iron detector; and determining the static mass of the irons according to the flying time of the irons in the field-free flying area. The mass spectroscope based on the method comprises the iron source area, the accelerating electric field, a field-free drift tube and the iron detector, wherein the accelerating electric field consists of three or more pulsed high voltages; and the pulsed high voltages are provided by corresponding electrodes. Data measured by the method and the mass spectroscope is the real mass-to-charge ratio of the irons, so the mass is accurate and is not required to be corrected; the mass spectroscope is high in sensitivity and resolution; the quality detection up limit is only limited by the detector; and the mass spectroscope is high in analysis speed, does not require scanning and can realize full-spectrum analysis within tens of seconds.

The invention provides a transformer insulating oil moisture and hydrogen system detection device and a detection method thereof. The transformer insulating oil moisture and hydrogen system detectiondevice comprises an oil line system, a hydrogen detection module, a communication module and a system software module; the oil line system comprises a filter, a deaeration chamber, and an oil pump connected through pipeline in order; a liquid level controller is arranged in the deaeration chamber, a moisture sensor is arranged at the bottom, an electromagnetic valve is arranged between the filterand the deaeration chamber, and a second electromagnetic valve is arranged between the deaeration chamber and the oil pump; the hydrogen detection module comprises a deaeration chamber, an air pump and a hydrogen sensor connected in order through the pipeline; a third electromagnetic valve is arranged between the air pump and the hydrogen sensor, and a fourth electromagnetic vale is arranged at anoutlet of the hydrogen sensor; the oil line system and the hydrogen detection module are in signal connection with the system software module, the system software module and the communication moduleare in data transmission connection, and the communication module and the master station computer are in data transmission connection.

The invention discloses a flat panel detector for X-ray phase-contrast imaging and a use method of the flat panel detector. The flat panel detector for the X-ray phase-contrast imaging comprises a detector pixel layer, wherein a scintillator layer grows or is attached to the detector pixel layer; the scintillator layer is covered with a coded mask consistent with a detection pixel period; the coded mask is covered with a protecting layer. The flat panel detector for the X-ray phase-contrast imaging, disclosed by the invention, can be used for CBI phase-contrast imaging, and also can be used for effectively inhibiting scattering and reducing photon interference between every two adjacent pixels in conventional X-ray absorption-contrast imaging application, so that the image resolution is improved.

The invention provides a water ions sensor which can realize high-precision measurement, no calibration requirement and remote monitoring. The water ions sensor has a positive electrode and a negative electrode, a transition metal is welded on each electrode, the other end of the transition metal is welded with a lead, the other end of the lead is connected to a conversion module, the conversion module is fixed with one end of two electrodes by a case, and an output end of the conversion module outputs the signals through the lead.

The invention discloses a steel heat treatment deformation treatment method aiming at easily deformable parts during a heat treatment process, such as a part manufactured from 25Cr2Ni4WA steel and the like. Before heat treatment, certain heat shrinkage deformation amount is reserved, such that the part is restored to an original size after heat treatment. Also, according to the method, with a direct air-cooling quenching method, the part does not deform or slightly deforms. Therefore, with the steel heat treatment deformation treatment method provided by the invention, a problem of severe deformation of a part prepared form easily deformable materials such as 25Cr2Ni4WA steel during the heat treatment process can be effectively solved.

The present invention provides a confocal fundus imaging optical coherence tomography (OCT) system based on an optical fiber controller, including an OCT light source, an optical fiber coupler, an optical switch, a spectrometer, a computer, a control circuit, a photoelectric detector, a photoswitch, a reference arm and a sample arm; the OCT light source is connected with the optical fiber coupler,the optical fiber coupler is connected with the spectrometer through the optical switch, the spectrometer, the computer and the control circuit are connected in turn, the optical switch, the photoelectric detector and the computer are connected in turn, the optical fiber coupler is connected with the reference arm through the photoswitch, the optical fiber coupler is connected with the sample arm, and the control circuit is connected with the optical switch and the photoswitch. On the basis of OCT fundus imaging, existing optical devices are used to realize high-signal-to-noise-ratio and high-resolution fundus confocal imaging by adding a small number of devices, the cost is low, an optical fiber path is adopted, debugging and maintenance are facilitated, and the size of the system is greatly reduced.

The invention provides an optical fiber temperature and vibration series integrated sensor based on a blazed grating and an optical fiber grating. The sensor is used for solving the problems that in the prior art, a temperature and vibration integrated sensor is large in zero drift, needs regular maintenance and calibration and is poor in sampling precision. The sensor comprises a shell and a cable, wherein the shell is internally provided with the optical fiber grating and a blazed grating vibration measuring structure; one end of the cable extends into the shell and leads out a path of optical fiber, the optical fiber grating is engraved on the upper portion of the path of optical fiber, and the blazed grating vibration measuring structure is connected with the tail end of optical fiber.The sensor is small in size, simple in structure assembly, small in zero drift, high in electromagnetic interference resistance, free of electric noise, high in measurement precision and high in connection reliability.

The invention relates to a braking system having a correction device (1) for correcting an opening time of a valve (103), which braking system comprises a signal input interface for a signal of a mostrecently input effective valve opening time (154), a signal input interface for a pressure (156) before the valve (103) after the most recently input effective valve opening time (154), a signal input interface for a pressure difference (125) between a pressure after the valve (103) before and after a current specification of the effective valve opening time (153), a valve opening time determination apparatus, which determines an effective reference system valve opening time (160) from the pressure difference (125) after the valve (103), the pressure (156) after the most recently input specification of the effective valve opening time (154) before the valve (103) and a parameter of the reference system (111) defining the pneumatic properties of a reference system (111), a correction timedetermination apparatus (127), which determines a correction time (162) as a difference between the most recently input effective valve opening time (154) and the effective reference system valve opening time (160), an addition apparatus (129), which adds up the correction times (162) after a current effective valve opening time (152) to form a summed correction time (164), and a signal output forthe summed correction time (164), by means of which summed correction time the current effective valve opening time (153) is corrected.

Disclosed is a quick wiring construction method for the multi-core control cable that comprises the following steps: matching equipment needing to be connected with the control cable; performing corresponding matching on the wiring terminal function and the terminal number of the matched equipment to form a wiring scheme of a control cable core; determining the number of wire cores of the control cable needing to be connected according to a matching result; and setting each wire core of the control cable connected to the equipment room to be a unique color, so that the terminal number, the terminal function and the wire core color of the equipment are matched and corresponding after the control cable is connected. According to the quick wiring construction method for the multi-core control cable, the control cable with the unique color core is adopted, the wiring scheme is deepened before construction, the unified matching principle of the terminal, the terminal definition and the core color is determined, and then the number of the cores of the control cable and the core color matching requirement are determined; an operator only needs to perform matching wiring on the colored wire core and the terminal without wire checking, so that the wiring efficiency and accuracy can be greatly improved.