69results about How to "Not susceptible to external interference" patented technology

The invention relates to a method for evaluating the construction quality of a tunnel, and discloses a method for evaluating the construction quality of tunnel drilling and blasting based on three-dimensional laser scanning. The method comprises the following steps of: acquiring data by adopting a tunnel data acquisition module at first, and then processing the acquired data by adopting a tunnel data pre-processing module, building a tunnel three-dimensional model building module according to the processed result, performing post-processing by adopting a tunnel three-dimensional model post-processing module, and finally, evaluating the result by adopting a tunnel drilling and blasting quality evaluation module. The method discloses by the invention has the advantages of being wide in measurement range, strong in applicability, high in automation degree, and good in reliability.

The invention discloses a CO2 displacement simulated testing method and belongs to the field of coal bed gas exploitation. A rock sample is placed in a model system (1), pressure pulse is applied on the rock sample; a gas control system (2) supplies test gas to the model system (1); a temperature control system (3) controls the temperature of the model system (1); a three-axis loading system (4) applies a confining pressure and an axial pressure on the rock core clamp of the model system (1); a vacuumizing system (5) vacuumizes the testing device; a gas sample collection system (6) detects thegas components after the test; and an electric controlling and monitoring system monitors the test process. The method comprises following steps: filling a sample into a tank, checking the air tightness, simulating the displacement, and cleaning the test system. The provided method can simulate the high temperature and high pressure environment in a deep coal layer in a lab; by applying pressurepulse on the rock sample inlet port, a simulated CO2 displacement test can be realized; the test efficiency is high, the external influence on the test is small, and the test result is more accurate.

The invention relates to a numerical word wheel of a direct-reading gage. The numerical word wheel comprises a main wheel with numerical words marked on the side surface, wherein an annular magnet is arranged on the right side wheel surface of the main wheel, one half circle of the annular magnet is an N-pole, the other half circle of the annular magnet is an S-pole, a shaft installation hole is arranged in the center of the main wheel, a shielding cover is arranged at the left side of the main wheel, and the shielding cover covers the left side wheel surface of the main wheel. A first drive gear is arranged on the edge of the left side wheel surface of the main wheel, and a second drive gear is arranged on the edge of the right side wheel surface of the main wheel. The numerical word wheel of the direct-reading gage is simple in structure, not high in processing requirements, lowered in cost, and convenient to manufacture and assemble. When the direct-reading gage provided by the invention is used, a magnetic sensor is adopted to acquire the rotating angle of the numerical word wheel, only one magnetic sensor is installed corresponding to one numerical word wheel, so that convenience is brought, the processing requirement is not high, the external interference is less, the precision of a metered electric signal is high, and the electronic type reading accuracy of the direct-reading gage is improved.

The invention discloses a glue injection and injection molding method for inductors, which includes inner glue injection and outer injection molding. In inner glue injection, at least a through hole of one inductor is filled with a circular glue layer the same as the through hole in shape, two ends of the circular glue extend out of two end faces of the inductor, the outer peripheral face of the extension end is serrated, and accordingly a semi-finished inductor is obtained. In outer injection molding, subjecting the outer periphery and the through hole of the semi-finished inductor element are subjected to injection molding. A plastic layer at least covers an extension end of the circular glue, so that the plastic layer is meshed with the serrated outer periphery of the extension end. The inductors produced by the method are high in temperature and humidity resistance, fine in insulativity, stable in inductance and low in cost.

The invention discloses a Fabry-Perot (F-P) cavity. The F-P cavity is a folded confocal cavity which is integrally formed by a single optical element, wherein the folded confocal cavity is provided with three reflecting surfaces; a first reflecting surface is a plane and is used as an input and output coupled surface; a second reflecting surface is a plane; a third reflecting surface is a spherical surface; and the curvature radius of the spherical surface is half of the geometrical length of a round trip of a light ray in the folded confocal cavity. The invention also discloses a laser based on the F-P cavity. Through the technical scheme, the problems that the conventional F-P cavity has poor stability, is easily interfered by surroundings, has a too large volume and a complicated system and the like are solved.

The invention provides a weak current measuring device of an ATE system and a measuring method. The measuring device comprises at least one group of I-V conversion circuits and a V/I source. The I-V conversion circuit is used to carry out current-to-voltage conversion, two measurement input ends are connected in series with a tested loop, and the I-V conversion circuits are connected to the V/I source through a Kelvin circuit. The V/I source is connected to positive and negative power supply terminals of the I-V conversion circuits through a Force H wire and a Force L wire of the Kelvin circuit so as to provide a work voltage. An output terminal of each I-V conversion circuit is connected through a Sense H wire of the Kelvin circuit, and an output voltage is measured. And a grounding terminal of each I-V conversion circuit is connected through a Sense L wire of the Kelvin circuit. The device has a simple structure, a small size and low power consumption, can be placed very close to a measured device and is not interfered by the outside world. And measurement accuracy is high.

The invention discloses a data processing method of a chip for fault detection and diagnosis in a multistage reciprocating compressor, and the chip for fault detection and diagnosis is subdivided into eight processing units which can operate in parallel, namely an IO unit, a control unit, a parent individual storage unit, a child individual storage unit, a crossover operation unit, a mutation operation unit, an adaptability degree calculation unit and a section operation unit, and data processing is performed in the eight processing units and comprises three phases: A, an initiation process; B an evolutionary computation continuity process; and C, a process for terminating evolutionary computation. In the invention, by changing the timing sequence of an on-line fault detection and diagnosis algorithm into a parallel one, the computation speed of the algorithm is improved, and the computation time is reduced, thus achieving the requirement of an embedded system on instantaneity.

The invention discloses a controller-based active radial bogie and an active steering control method thereof. The controller-based active radial bogie comprises an active radial bogie body, a drivingcircuit, a displacement sensor and the controller; the active radial bogie body comprises a main framework, an auxiliary framework and a radial driving mechanism; the main framework is hinged to the auxiliary framework; the two ends of the radial driving mechanism are connected with a front rotating arm and a rear rotating arm of the main framework respectively; the displacement sensor is installed on the main framework; the displacement sensor and an pulse encoder are connected with the controller; the controller is connected with a motor of the radial driving mechanism through the driving circuit. With the controller-based active radial bogie and the active steering control method thereof, the active steering control effect of the active radial bogie can be improved; the running stability and curve trafficability of a railway vehicle are improved; control is stable; steering control precision is high; immunity to external interference is almost realized; accurate active steering is achieved; the abrasion of wheel sets is effectively reduced; and the service lives of the wheel sets are prolonged.

The invention provides a method and a device for testing skin water content by infrared spectroscopy, and belongs to the technical field of infrared spectrum measurement. In order to solve the problemthat the electric method for measuring skin moisture content is susceptible to external interference, the invention discloses a method for measuring skin moisture content, which is characterized in that: a short-wave infrared light source is irradiated on a selected measuring position; extracting information from light reflected from skin tissue; The concentrations of the components to be measured were calculated by using short-wave infrared spectroscopy. Short-wave infrared spectroscopy is a rapid, non-invasive and non-contact technique for the accurate measurement of skin moisture.

The invention discloses a green liquid adhesive bandage with an antibacterial function and a preparation method thereof. The formula of the liquid adhesive bandage comprises the following components in percentage by mass: 10-40% of a film-forming agent, 0.1-3% of octenidine, 0.2-20% of a humectant, 0.1-5% of a wound healing promoting substance, 0.01-0.03% of a blood coagulation factor and 31.9-84.7% of water, the film-forming agent is prepared from the following components in percentage by mass: 3 to 13 percent of polyvinyl alcohol, 3 to 13 percent of polyvinylpyrrolidone and 4 to 14 percent of polyvinyl butyral; the product prepared according to the formula and the method has the advantages of being good in antibacterial effect, fast in film forming, small in skin irritation, fast in hemostasis, fast in wound healing, free of peculiar smell and the like.

The invention provides a bridge girder erection machine bearing performance rapid detection device and an evaluation method. The detection device comprises a double-layer frame, a standard counterweight, a distance measurement module, an operation module, a storage module and a storage battery. Wherein the distance measurement module comprises a circuit controller, a laser emission unit, a photoelectric conversion unit, a phase identification unit and a distance calculation unit; the standard counterweight is mounted on the upper layer of the frame; the distance measuring module is installed on the lower layer of the frame and used for determining the real-time distance between a crown block and a bridge floor through laser phase changes under carrying of the crown block moving at the constant speed. Carrying out bearing performance calculation on data of the distance measurement module by adopting a processor, carrying out real-time displacement and bearing performance data instant storage by adopting a cache unit, and fixing an operation module and a storage module at the top of the distance measurement module; all the devices are powered by the storage battery. According to the invention, the test module, the counterweight module, the calculation module, the power supply module and the like are integrated, the convenience of the detection process can be greatly improved, the misoperation probability of the detection process is reduced, and the reliability of the evaluation result of the bearing performance of the bridge girder erection machine is effectively improved.

The invention discloses a novel countable root canal file, belonging to dental medical devices. The novel countable root canal file comprises a handle, wherein the handle is provided with a counter; the upper end surface of the handle is provided with a hole, the inner side wall of the hole is provided with an annular groove, and the side wall of the annular groove is provided with a display hole;the counter comprises a character wheel sleeving the annular groove, and a pawl device arranged on a side wall of the hole, the outer side wall of the character wheel is provided with a digital sign,the upper end surface of the character wheel is fixedly connected with a ratchet wheel, the pawl device is connected with the ratchet wheel, an end surface of the character wheel is provided with a through hole, the axis of the through hole is collinear with the axis of the character wheel, a circular ring is sheathed in the through hole, the inner side wall of the circular ring is provided witha chute, a button sleeves the upper end of the hole, the button can move in the hole along the axis of the hole, the bottom of the button is connected with a connecting rod, the side wall of the connecting rod is provided with an inclined block, and the inclined block adapts to the chute. According to the novel countable root canal file, the number of uses of the root canal file can be visually read on the handle.

The present invention discloses a low-error capacitance liquid level detection device which comprises: a shell, wherein a detection bottle body is placed in the shell, a connection shell is clamped and connected in the inner wall of the right side of the shell, a bearing shell is clamped and connected outside the right side of the connection shell, and an abutting block is fixedly connected to the inner wall of the right side of the bearing shell and plays a role in pushing and extruding the connecting shell; and bearing blocks which are evenly distributed outside the bearing shell, wherein adjusting bolts are connected to the interiors of the bearing blocks in a penetrating mode, a first capacitor block is connected to the interior of the upper side of the connecting shell, a second capacitor block is connected to the interior of the lower side of the connecting shell, and an adjusting rod is connected to the right side of the upper end of the connecting shell in a penetrating mode. According to the low-error capacitance liquid level detection device, in the using process, the capacitance module can be tightly attached to the bottle body, the detection effect is prevented from being influenced, the stability is high when the capacitance module is attached to the bottle body, the capacitance module is not prone to being interfered by the outside world, and therefore errors are reduced, and the detection accuracy is prevented from being influenced.