48results about How to "Expand detection range" patented technology

The invention provides a shape detection device and method based on a spiral FBG (fiber bragg grating) sensor array, and the device comprises the spiral FBG sensor array, an FBG demodulator, data collection and shape reconstruction equipment, and display equipment. The device does not need other peripheral auxiliary equipment, is not affected by electromagnetic interference, is good in medical compatibility, does not emit rays, and can achieve the long-distance remote monitoring. Through the spiral configuration of the FBG sensor array, the device can achieve the multi-point deformation detection of a single optical fiber, and forms a quasi-distributed detection system. Through the packaging of the optical fiber on a nickel-titanium alloy filament, the device protects a grating point from being worn, is strong in anti-interference capability, and enlarges the detection range. The device can obtain the shape of a flexible robot in real time, and is high in real-time response. Meanwhile, the device detects the curvature and torsion, is simple in detection method, can be used for the shape sensing detection in a gastroscope, colonoscope and a flexible / soft robot, and plays an important role in the flexible robots in the fields of dibaster assistance, medical rehabilitation and national defense security.

A pen type coordinate indicator for a position input device is provided, which is capable of widening a detection range of a pressing pressure (pen pressure) while preventing erroneous (false) detection. A coil spring (i.e., a first elastic body) and a silicon rubber (i.e., a second elastic body) are interposed between an end surface of a first ferrite core, around which a coil connected to a resonance circuit is wound, and an end surface of a second ferrite core, within the pen. The first and second elastic bodies operate to controllably change (narrow) the distance between the two end faces in accordance with the pressure applied to the pen tip. As a result, an inductance value of the coil wound around the first ferrite core is controllably changed and thus a phase (frequency) of an electric wave transmitted from the resonance circuit to a position detector is controllably changed.

The invention discloses a verification device of static weight and superposition composite hook scale, which includes a baseboard, a pull up connector, a hook scale, a drop down connector and a center hanger. Two upright columns are installed in parallel on the baseboard. A supporting board is installed on the upright column. Two lead screws are installed in parallel on the supporting board. A fixed beam is installed on the top of the lead screw. A moving beam is installed between two lead screws. Standard transducers are installed on the moving beam from the left to the right. A weight pallet and several counterweights are installed vertically on the center hanger. A mechanism, which is used to release counterweights, is installed on the upright column. A link block is installed at the bottom of the center hanger. A hydro-cylinder is installed on the baseboard. A plunger is installed in the hydro-cylinder. The link block is located in the fluting groove of the plunger. The manufacturing cost of the verification device of static weight and superposition composite hook scale is low and the measuring range of the verification device of static weight and superposition composite hook scale is large.

The invention provides an MEMS (micro-electromechanical system) thermal-type flow sensor, which comprises an MEMS thermal-type flow sensing chip and a fluid passage. A groove is arranged on the inner wall of the fluid passage, the MEMS thermal-type flow sensing chip is installed in the groove, the sensitive side of the MEMS thermal-type flow sensing chip is flush with the surface of the inner wall of the fluid passage, and the fluid passage is a pipeline which has a smooth inner wall and a square transverse section. The MEMS thermal-type flow sensor has the advantages of simple structure, low cost, implementing easiness, outstanding effect and high accuracy of detection results.

The present invention relates to an apparatus and method of performing wireless communication using multiple directional antennas. The transportation means according to the present invention includes at least two communication devices, wherein one of the at least two communication devices, communication device A, includes a directional antenna group 1, and the other communication device, communication device B, includes a directional antenna group 2, and wherein the communication device A performs directional antenna selection control of the directional antenna group 1 included in the communication device A depending on whether the communication device B is connected with a network. According to the present invention, one of the communication devices gains access to a satellite station, a base station, or other ships, at least one antenna of another communication device may be used to relay wireless communication and may play a role as a base station or an AP.

The invention belongs to the technical field of water quality detection analysis and discloses a water sample diluting system and a water sample diluting method capable of enlarging on-line water quality detection range. The system comprises an overflowing bottle, a sampling pump, a diluting water pump, a tee joint, a mixing unit, a mixing pump and a control unit; water samples are diluted according to the proportion by controlling the operating time of the sampling pump and the diluting water pump, the water samples are mixed by the mixing pump, the mixed water sample is discharged after measurement, and the system automatically amplifies the diluting times when the measuring result still exceeds the detection limit after dilution is conducted according to certain times. The diluting times of the water sample is from several times to several tens of times, so that the high-concentration water sample can be diluted rapidly and accurately on line, the on-line water quality detection range is enlarged, the diluting times can be switched automatically, manual intervention is less and the automation degree is high.

A slant-plate flow sensor is composed of shell, measuring tube fixed in the shell and with hollow space as measuring channel, measuring plate in the measuring tube linked to the lower end of measuring plate, restoration spring between measuring tube and plate, a magnet on the measuring plate and magnetosensitive element fixed to shell and opposite to said magnet. When fluid pushes the measuring plate to make it slant, said mangnetosensitive element can measure the change of magnetic field and output flow signal. Its advantages are high precision, low resistance to fluid, simple structure and long service life.

The invention belongs to the technical field of vision measurement, and discloses a vision measurement method and device. The device comprises a parallel light source which generates parallel light beams after passing through a group of optical lenses through a point light source; a to-be-measured product which is placed in a flatness range irradiated by the parallel light beams; a projection screen, wherein the front surface of the projection screen receives contour projection generated after the parallel light source irradiates the part; a lens which is used for projecting and converging theoutline of an object on the projection screen onto the target surface of a camera; and the camera which is fixedly arranged on the back surface of the projection screen, and converts the image into digital information to be processed by a computer. The visual measurement method and device for object contour measurement have the advantages of high detection efficiency, large detection range, low system construction cost and easy implementation.

The invention belongs to the technical field of pressure detection, and particularly relates to a flexible pressure sensor and a preparation method thereof. The flexible pressure sensor comprises a flexible substrate, a patterned electrode in close contact with the flexible substrate, a signal transmission electrode electrically connected with the patterned electrode, a pressure-sensitive layer covering the patterned electrode, and a protective layer covering the pressure-sensitive layer or the signal transmission electrode. The preparation method comprises the following steps: S1, selecting a flexible film or a textile fabric as a flexible substrate; S2, manufacturing a patterned electrode layer; S3, preparing a pressure-sensitive layer; S4, preparing a first protection layer; S5, manufacturing a signal transmission electrode; and S6, preparing a second protection layer. The patterned electrode, the pressure-sensitive layer and the protective layer are all directly processed layer by layer through printing or etching, so that the processes of fitting processing, packaging and the like are omitted, the deformation of a film material can be effectively avoided, and the sensor is light, thin, small and exquisite in size, low in power consumption, suitable for application requirements in various occasions and high in universality.

The invention provides an electronic level meter based on liquid metal for angle measurement. The electronic level meter comprises a first field effect transistor, a second field effect transistor anda friction nano generator, wherein the second field effect transistor is arranged side by side with the first field effect transistor; the friction nano generator is located above the first field effect transistor and the second field effect transistor, and comprises a friction layer and a liquid metal; the friction layer is a cavity structure; and the liquid metal is located in the cavity. The electronic level meter has the characteristics of high sensitivity, large detection range and good stability, and has important application prospects in the fields of mechanical manufacturing, civil engineering, geological exploration and the like.

The invention discloses a TOF sensing device and a distance detection method thereof, and the method comprises the steps: transmitting pulse detection light to irradiate a detected view field, and thepulse detection light at least comprising two types of pulses with different pulse widths; receiving the reflected pulse detection light, and obtaining initial distance information of each position in the detected view field according to the time interval of the pulse of the pulse detection light from emission to reception; and combining the initial distance information obtained according to thepulses with different pulse widths to obtain the measured distance information of each position in the measured field of view. According to the TOF sensing device and the distance measuring method thereof, the influence of multi-path reflected light can be reduced, and the distance detection accuracy is improved.

The invention discloses a preparation method and application of a hydrogel flexible touch sensor, and belongs to the field of flexible wearable sensing. The preparation method mainly comprises the following steps: (1) preparing double-network cross-linked hydrogel from polyacrylamide and polyvinylpyrrolidone which have a hydrogen bond complexing effect; (2) initiating cross-linking polymerization of an acrylamide monomer through an initiator ammonium persulfate and a cross-linking agent N, N'-methylene bisacrylamide to form supramolecular hydrogel with a chemical cross-linking structure and a hydrogen bond cross-linking structure; (3) adding a conductive polymer complex poly(3, 4-ethylenedioxythiophene): polystyrolsulfon acid into the hydrogel preparation solution to improve the conductivity of the hydrogel; and (4) injecting the conductive hydrogel precursor solution into a fixed mold, and preparing the flexible touch sensor by adopting an ultraviolet-initiated free radical polymerization means. The prepared conductive stretchable hydrogel film has high stretch rate and sensitive stress responsiveness, and can be used for monitoring the movement or health condition of a human body in real time.

The invention relates to an asphalt mixture smoke concentration detection device and method, and belongs to the technical field of asphalt detection devices. The device comprises detection mechanisms,each detection mechanism comprises a bottom plate, stand columns perpendicular to the bottom plates are arranged on the bottom plates, smoke detection devices are arranged on stand columns, display devices are arranged on the stand columns, universal wheels are arranged at the lower portions of the bottom plates, there are the plurality of detection mechanisms, rod bodies are arranged between thestand columns of the adjacent detection mechanisms, fixed plates are oppositely arranged at the positions, located at the end portions of the rod bodies, on the stand columns, through holes are arranged at the fixed plates at the two sides, rotating shafts penetrating and rotationally connected with the internal portions of the through holes on the fixed plates at the two sides are fixedly arranged on the end portions of the rod bodies, the plurality of detection mechanisms are arranged to drive the smoke detection devices to detect the asphalt smoke at the same time to improve the detectionrange of the asphalt mixture smoke concentration detection device so as to improve the use effect of the asphalt mixture smoke concentration detection device.

The invention relates to a homogeneous chemiluminiscence detection kit and application thereof and belongs to the technical field of chemiluminiscence. The kit comprises an acceptor reagent and a donor reagent; the acceptor reagent comprises at least two acceptor microspheres with different particle sizes; and the acceptor microspheres can react with singlet oxygen active oxygen to generate detectable chemiluminiscence signals; and the donor reagent comprises donor microspheres which can generate singlet oxygen active oxygen under an excited state. The kit disclosed by the invention not only has ultrahigh sensitivity, but also has a very wide detection range. Besides, the reaction speed of the small-particle-size light-emitting microspheres is high, and thus, with the immunoassay method adopted for detection, detection time can be shortened, and reaction speed is increased.

A pressure sensor unit and a pressure sensor are provided. The pressure sensor unit comprises a microstructure layer, a flexible conductive film layer and an interdigital electrode layer which are sequentially arranged, and a plurality of convex-concave microstructures are formed on the surface of the side, facing the flexible conductive film layer, of the structure layer. The pressure sensor unithas high intrinsic repeatability, sensitivity and resolution.

The invention discloses an ultrasonic surface position monitoring device with an energy converter adopting a self-adaptive impedance matching method. According to differences among measurement ranges,surface conditions of surface positions of material and surroundings, different ultrasonic energy converters are replaced. In combination with influence of temperature factors, static capacitance ofan ultrasonic energy converter in use can be measured in a real-time manner. Additionally, self-adaptive impedance matching of the ultrasonic energy converter is performed. The ultrasonic surface position monitoring device is featured by being convenient in application, easy in operation, broad in range of application, high in detection speed and detection precision and wide in detection range.

The invention discloses an electrostatic detection device which comprises a shell, a metal shielding cover arranged in the shell, a metal support, an induction metal sheet arranged in the metal support, a circuit board and net ports formed in the two ends of the electrostatic detection device. The induction metal sheet, the metal support and the metal shielding cover are all installed on the circuit board, and the circuit board is fixedly installed on the shell. A piezoelectric ceramic piece is attached to the inner side of the metal support. And the metal shielding cover and the shell thereof are correspondingly provided with windows as a detection area at the position of the metal induction sheet. The electrostatic detection device can improve the electrostatic detection precision and the electrostatic detection range.

The invention relates to a chemiluminiscence analysis method and belongs to the technical field of chemiluminiscence analysis. According to the chemiluminiscence analysis method, the intensity of chemiluminiscence signals generated by the reaction of at least two receptor microspheres with different particle sizes in a to-be-detected sample and active oxygen is detected, so that whether the to-be-detected sample contains to-be-detected target molecules and / or the concentration of the to-be-detected target molecules can be analyzed and judged. The method provided by the invention not only has ultrahigh sensitivity, but also has a very wide detection range. Besides, the reaction speed of small-particle-size light-emitting microspheres is high, and thus, with the immunoassay method adopted, detection time can be shortened, and reaction speed is increased.

The invention discloses a laser ring-down detection method which comprises the following steps: laser wavelength output by a laser is regulated, so that the output laser wavelength avoids from a central wavelength corresponding to a to-be-detected gas absorption peak; absorption cross-section parameters corresponding to the output laser wavelength are set according to the output laser wavelength, so that the absorption cross-section is reduced to further expand the detection range of a to-be-detected gas concentration; or the sampling rate is correspondingly improved according to ring-down time of to-be-detected gases of different concentrations, and further the detection range of the to-be-detected gas concentration is expanded. According to the laser ring-down detection method disclosed by the invention, the defect in the prior art that the detection range is limited is overcome, the detection range of the laser ring-down detection is widened, and accurate detection of high-concentration gases is realized.

The invention discloses a Pu'er tea pile fermentation Internet of Things monitoring system and monitoring method, and the system comprises a temperature and humidity monitor which is used for detecting Pu'er tea pile fermentation environment parameter data; a cloud server which is used for receiving the environmental parameter data uploaded by the temperature and humidity monitor and carrying outdata processing on the environmental parameter data to obtain environmental parameter information; and a receiving terminal which is in network connection with the cloud server and is used for receiving the environmental parameter information pushed by the cloud server. According to the invention, the problems of low efficiency, poor accuracy, poor real-time performance, incomplete monitoring andthe like caused by experience and limb perception of Pu'er tea pile fermentation for a long time can be solved. In the Pu'er tea pile fermentation process, the functions of real-time, remote and accurate monitoring, alarming and the like of the temperature and humidity in the pile are achieved, and the Pu'er tea pile fermentation technology digitization and standardization are achieved, the pile fermentation quality stability is guaranteed, and the innovative technology of Pu'er tea brands is created.

The invention discloses an intelligent correction anti-interference high-precision salinity detector. The intelligent correction anti-interference high-precision salinity detector comprises a shell, acircuit board, a display screen, a control key and three arc metal bodies, wherein the outer circumferential surface of the front end of the shell is provided with a recessed groove, the three arc metal bodies are embedded into an exposed opening of the recessed groove and are completely lower than the outer circumferential surface of the front end of the shell; when in detection, the phenomenonthat the arc metal body contacts the inner wall of a container can be completely prevented, the problem of the traditional detector that whether detection ring contacts the inner wall of the containerneeds to be always watched can be prevented, the interference resistance is high, and the detection precision is high; and meanwhile, a first salinity value and a second salinity value are correspondingly acquired by virtue of a first salinity detection module and second salinity detection module in the circuit board, whether the two groups of data are in a designed range can be determined by virtue of intelligent analysis, two groups of data can be acquired by virtue of one-step insertion detection for comparison, the accuracy of the detection value can be effectively ensured, the display error result is avoided, the detection procedures are also simplified, and the detection efficiency is improved at the same time.

The invention a method for performing supersensitive detection on mercury ions by using a T-Hg(II)-T structure-based AgNCs probe. The method comprises the following steps: synthesizing a siliver nano-cluster (DNA1-AgNCs) by taking DNA1 as a template, performing hybrid combination on the DNA1-AgNCs and DNA2 to obtain a DNA1 / DNA2-AgNCs fluorescent probe, and detecting the Hg(II) concentration of the solution by utilizing the fluorescence change of the DNA1 / DNA2-AgNCs fluorescent probe. The method has the advantages of label-free property, strong signal, high specificity, high sensitivity, wide detection concentration range, low detection limit and the like.

The invention relates to a compact high-sensitivity MEMS micro-capacitance type sensor. The device comprises a substrate (10), a lower isolation layer (11), a lower electrode layer (12), an upper isolation layer (13), Sacrificial layer (14), and a diaphragm layer (15), an upper electrode layer (16), an insulating layer (17) which are sequentially arranged from bottom to top, The lower electrode layer (12) and the upper electrode layer (16) comprise at least one electrode array unit (22), the electrode array unit (22) comprises a plurality of electrode units, and the edges of the electrode units (19a) of the lower electrode layer (12) and / or the electrode units (19b) of the upper electrode layer (16) are provided with a plurality of notches (20). The overlapping area of the fixed parts of the electrodes of the capacitor structure is reduced, so that when the vibrating diaphragm vibrates, the larger the capacitance change amplitude is, the more obvious the impedance conversion can be caused after the characteristic frequency offset.

The invention discloses a device for expanding the detection range of a current sensor. The device comprises a detection module and a bypass shunting module, the input ends of the detection module and the bypass shunting module are respectively connected with the output end of the power supply, and the output ends of the detection module and the bypass shunting module are respectively connected with the load module; the bypass shunting module is a copper laying plane on a PCB, the copper laying plane and a current detection pin of the detection module are arranged in parallel, power supply current flowing from a power supply to the load module is divided into two parts, and shunting of the power supply current is achieved. The bypass shunt module has a known shunt ratio, and the actual power supply current provided by the power supply is calculated according to the shunt ratio and the output current value of the detection module; shunting is carried out by adopting a PCB printed wire shunting scheme, so that large current detection can be realized by adopting a small-range current sensor detection mode, a large number of discrete electronic devices do not need to be used, and the circuit has the advantages of small circuit size, low cost and the like.

The invention discloses a chloride ion detector and a chloride ion detection method, and relates to the field of water quality detection equipment, the chloride ion detector comprises a sampling tank, a communication device, a titration cell, a liquid dropping mechanism, a solution storage device, a water supply device, a reagent supply device and a controller; the reagent supply device is used for containing related reagents; the sampling tank is used for acquiring and outputting liquid; the titration cell is communicated with a liquid dropping mechanism, the liquid dropping mechanism is used for dropping a titration solution into the titration cell, and a titration monitoring device is arranged on the outer side of the titration cell; the communicating device is connected with the sampling tank, the titration cell, the water supply device, the solution storage device and the reagent supply device; the controller is electrically connected with the sampling tank, the communicating device, the titration cell and the liquid dropping mechanism, and the controller is used for respectively controlling the connection and disconnection of the sampling tank, the titration cell, the solution storage device and the reagent supply device with the communicating device. According to the chloride ion detector and the chloride ion detection method, the concentration of a high-concentration chloride ion solution can be detected, and the detection precision and the detection efficiency are improved.

The invention discloses a calcium hardness detector and a calcium hardness detection method, and relates to the field of water quality detection, wherein the calcium hardness detector comprises a sampling tank, a communication device, a titration cell, a liquid dropping mechanism, a reagent supply device and a controller; the reagent supply device is used for containing reagents required by detection; the sampling tank is used for metering, acquiring and outputting liquid; the titration cell is communicated with the liquid dropping mechanism, a titration monitoring device is arranged on the outer side of the titration cell, the titration monitoring device is used for monitoring the reaction degree of a solution in the titration cell and comprises a light source and a light sensing device, and the light sensing device is not directly irradiated by light of the light source; the communicating device is connected with the sampling tank, the titration cell and the reagent supply device; and the controller is electrically connected with the sampling tank, the communicating device, the titration cell and the liquid dropping mechanism, and the controller is used for respectively controlling the on-off of the sampling tank, the titration cell, the reagent supply device and the communicating device. According to the calcium hardness detector and the calcium hardness detection method, the calcium hardness detection precision can be improved, and the detection efficiency is improved.

The invention relates to a chromatographic analysis device and method. The device comprises a detector, a first chromatographic column, a second chromatographic column, a third chromatographic columnand an electronic pressure control module; an input end of the first chromatographic column is connected with a sample, and an output end of the first chromatographic column is connected with the second chromatographic column and the third chromatographic column; an output end of the second chromatographic column is connected with the detector, an output end of the third chromatographic column isconnected with the detector, and retention time of high-sensitivity substances on the second chromatographic column is different from that of the high-sensitivity substances on the third chromatographic column; an output end of the electronic pressure control module is connected with a gas path between the first chromatographic column and the third chromatographic column, and the electronic pressure control module is used for controlling connection and disconnection between the first chromatographic column and the third chromatographic column. The device has the advantages that the detection sensitivity is guaranteed, and the detection range is increased.