56results about How to "Realize multi-point detection" patented technology

The invention relates to a fiber grating temperature sensor which comprises a probe and a demodulating system connected with the probe, wherein the probe comprises a needle head and a handle which are connected together. The fiber grating temperature sensor is characterized in that the needle head is an austenitic stainless steel round bar with a needle point, the center of the bottom surface at one end of the austenitic stainless steel round bar is provided with a blind hole, and the blind hole extends close to the other end of the austenitic stainless steel round bar; and a fiber bragg grating is arranged in the blind hole. The invention is mainly used for manufacturing fiber grating temperature sensors for microwave thermotherapy of bone tumors.

The invention which is suitable for a photoelectric detection technology provides a system and a method for surface plasmon resonance sensing detection. The system comprises: light sources for generating sensing lights; a first lens for adjusting the sensing lights into collimated lights; a polarizer for obtaining P-polarized lights in the collimated lights; a prism for receiving the P-polarized lights to irradiate the P-polarized lights onto a sensing surface; a controller for controlling the light sources to allow the light sources to be sequentially lightened at different positions of a focal plane of the first lens and sequentially irradiate each P-polarized light onto the sensing surface from different angles; and an imaging mechanism for recording the intensity distribution of lights reflected by the sensing surface. According to the invention, the light sources are sequentially lightened at different positions of the focal plane of the first lens through an electronic control mode, so the P-polarized lights are sequentially irradiated onto the sensing surface from different angles, the intensity distribution of the lights reflected by the sensing surface is recorded in real time, SPR angular scan curves of each point on the sensing surface are obtained in parallel, the stability is good, and the speed is fast.

The invention discloses a distributed fiber sensor for identifying foreign body intrusion and a foreign body intrusion signal sensing processing method and belongs to the technical field of optics. According to technical key points, the method comprises the following steps: dividing incident light of a laser into two paths by virtue of an optical fiber coupler I, enabling one path of probe light to pass through an acoustic optical modulator, an erbium doped optical fiber amplifier I and a circulator I to enter to-be-detected optical fibers, generating backward scattered light, enabling the light to enter a filter via an erbium doped optical fiber amplifier II and a circulator II, enabling a reflection end of the filter to pass through the circulator II, enabling the light enter an opticalfiber coupler II together with reference light, outputting beat frequency light by the optical fiber coupler II, performing photoelectric conversion by adopting a balanced detector, acquiring signalsby a data acquisition unit, and transmitting the signals into an upper computer. According to the method disclosed by the invention, the intrusion mode is identified by adopting a support vector machine (SVM) based algorithm. The method comprises the steps: acquiring signals in different intrusion modes to perform feature extraction and classification, forming a training data sample set, and training by adopting the SVM based algorithm, thereby obtaining a subsequent identification network model. The method disclosed by the invention is used for sensing and identifying foreign body intrusion events.

The invention relates to a shale gas content determining method and a determining system of the shale gas content determining method. The shale gas content determining method has the main characteristics that a computer is used as a processor and a whole determining process has no piezoresistance under the supporting of relative programs; a filtering and drying mechanism is connected with a methane component infrared gas sensor and a carbon dioxide component infrared gas sensor by pipelines; pipelines, which are output to a large-range mass flow meter and a small-range mass flow meter, of the carbon dioxide component infrared gas sensor are connected with solenoid valves; the outputs of the large-range mass flow meter and the small-range mass flow meter are connected with a gas outlet by pipelines; a pipeline, which is output to the gas outlet, of the carbon dioxide component infrared gas sensor is connected with a solenoid valve by a pipeline; acquisition mechanisms ADAM4017 receive standard analog signals output by the infrared gas sensors and the mass flow meters; and a control mechanism ADAM4068 is connected with coils of all the solenoid valves respectively. According to the shale gas content determining method and the determining system of the shale gas content determining method, the content of desorbed gas, the content of desorbed methane and the accumulated amount of the desorbed gas and the like can be calculated in real time, and the loss gas content, the gas content and the like are calculated by a loss gas calculation model which is established by corresponding standards. The content of shale gas can be accurately measured by accurately measuring the percentage contents of methane and carbon dioxide and removing the mixed air through software calculation.

The invention discloses a baby quilt kicking alarm method and device based on temperature detection and wireless data transmission. A temperature sensor is used for detecting temperature, whether data transmission is needed or not is analyzed and judged according to detected temperature change, a wireless module is turned on if data transmission is needed, the wireless module is turned off after data transmission is finished, the device runs at ultra-low power consumption, a monitoring alarm unit receives data information transmitted by a temperature detection unit, an operation processing module gives alarm commands to an audible alarm module and a visual alarm module for giving an audible and visual alarm, the operation processing module detects whether alarm interrupt is cancelled or receives temperature recovery data transmitted by the temperature detection unit or not, and the alarm is stopped if the operation processing module detects that alarm interrupt is cancelled or receives the temperature recovery data. The temperature of a baby quilt is detected in real time, whether a baby kicks a quilt or not is analyzed through a baby quilt kicking temperature change model, the audible and visual alarm is timely given when the baby kicks the quilt, baby quilt kicking can be accurately and timely discovered, and the problem that the baby catches a cold due to quilt kicking is effectively solved.

The invention discloses an in-service bridge support damage diagnosis method based on a vehicle braking effect, and belongs to the technical field of bridge support damage diagnosis. The objective ofthe invention is to solve the problems that an existing in-service bridge support damage diagnosis method cannot accurately perform structural damage positioning and is not high in measurement precision. According to the invention, the accurate bridge finite element model is established by using a model correction method, and a vehicle brake numerical simulation method is provided, so that a braketest scheme suitable for the bridge to be detected can be formulated more accurately. A proper wavelet basis function decomposition level is selected by utilizing a cost function, wavelet packet decomposition is performed on a free attenuation signal acquired at the pier top of the pier, and a damage index is constructed to diagnose the damage position and degree of the support. The method is simple to operate, economical and practical, has certain robustness and noise immunity, and does not greatly influence the bridge structure.

The invention provides a fixture used for testing thickness and deflection of a battery and a test method by using the fixture to test the thickness and the deflection of the battery. The test fixture is characterized in that: the test fixture comprises: a base plate, a pair of parallel side plates which are perpendicular to the base plate, a pair of end plates which are connected with the side plates on the ends, and more than 2 test sections which are located between the side plates; the test sections have openings at tops and inner walls of the test sections are formed into insertion grooves which can insert into the battery to be tested; gaps exist between outer walls and the side plates; the test sections can slide along a direction which is perpendicular to the direction of the sideplates.

The invention discloses an oxygen generator PSA carbon dioxide self-diagnosing system which is connected with an oxygen generator PSA system. The self-diagnosing system comprises a sampling unit which is used for sampling various paths of gas of the oxygen generator PSA system, a sampling control unit connected with the sampling unit and used for controlling the on/off of the sampling unit, an analyzer used for analyzing gas collected by the sampling unit and transmitting the analysis result to a DCS system, the DCS system connected with the analyzer, and a diagnosis unit respectively electrically connected with the DCS system and the sampling control unit. The diagnosis unit performs diagnosing according to signals transmitted by the DCS system, and controls the on/off of the sampling unit through the sampling control unit.

The invention is suitable for the technical field of photoelectric detection and provides a surface plasma resonance sensing detection system and its detection method. The surface plasma resonance sensing detection system comprises a light source, a first splitter, a first reflector, a prism, a second reflector, a polarizer, a first imaging device and a controller. With the combination of a Michelson interferometer structure and a scanning mechanism, phase variation information is reflected through a separation distance of the light intensity envelope maximum value of P polarized light, and the variation information of a sample's refractive index is further obtained, so as to avoid tedious phase extraction algorithm and increase practicality. In the meanwhile, the variation information of the refractive index of each point on the sensing surface is recorded by the imagine device to realize multi-point detection with high efficiency. The Michelson interferometer structure is formed by the light source, the first splitter, the first reflector, the second reflector and the first imaging device. The controller is used to control a stepping motor or a servo motor to drive the first reflector to carry out reciprocating motion so as to form the scanning mechanism, therefore endowing the surface plasma resonance sensing detection system with a simple structure and low cost.

The invention discloses a multispectral transceiving integrated sensor and a non-contact nondestructive glucometer. The sensor comprises a substrate, and a transmitting module, a detection module anda reading circuit which are all arranged on the substrate, and the transmitting module comprises a plurality of light sources with different wavelength ranges; the detection module comprises a plurality of detectors capable of responding to different wavelength ranges. The number of the transmitting modules and the number of the detection modules are both multiple, the wavelength range of the light source and the wavelength range responded by the detector are various, multiple sets of data are provided for subsequent blood glucose calculation through multi-point detection, the blood glucose detection precision is greatly improved, and the data can be directly provided for medical treatment.

The invention discloses a strength detection device for a wind wheel blade of a fan generator set. The strength detection device comprises a bottom plate, a box body, a hydraulic cylinder and a forward and reverse rotation motor, a notch is formed in the inner side of the bottom plate, a fixing base is fixedly connected to the upper end of the bottom plate, a fixing groove is formed in the fixing base, a blade is inserted into the fixing groove, a fixing rod is connected in the fixing base through threads, the lower end of the fixing rod is in close contact with the surface of the blade, the box body is fixedly connected to the upper end of the bottom plate, the inner side of the box body is fixedly connected with the fixing base, and a first switch and a second switch are fixedly installed at the right end of the box body; the first switch and the hydraulic cylinder are connected with an external power source in series through wires, and the second switch and the forward and reverse rotation motor are connected with the external power source in series through wires. According to the strength detection device for the wind wheel blade of the fan generator set, the strength detection device has the characteristics of convenience in transferring and clamping, capability of realizing multi-point detection and safety protection.

The invention discloses a sampling time delay distributed multi-point laser methane detection system and method. The method is characterized by converting a laser light wave with a specific spectrum into several beams of light waves, and then using a photoelectric detection unit to detect a light signal generated after the waves are absorbed by methane in each methane detection chamber and converting into an electrical signal, then, calculating and acquiring a sampling coefficient X of the electrical signal through a processor; when the sampling coefficient X is greater than or equal to 0.98,carrying out methane concentration calculation on the sampled electrical signal; when a cross-correlation coefficient X is less than 0.98, automatically delaying a sampling point for a sampling signalwaveform till that a correlation coefficient X obtained through carrying out cross-correlation processing on the corrected signal waveform and a driving signal is greater than or equal to 0.98; and finally, carrying out calculation processing on the electric signal after delay correction to obtain a methane gas concentration corresponding to the signal waveform sampled by each channel. In the invention, long-distance and wide-range multi-point detection can be realized, measurement accuracy is high and an anti-interference capability is high.

The invention provides a micro-fluidic flow velocity detection device based on surface plasmon resonance, which comprises a micro-fluidic chip, a flexible layer and noble metal particles. The surfaceof the micro-fluidic chip is provided with a fluid channel, the flexible layer covers the fluid channel, the flexible layer is provided with openings at the inlet and the outlet of the fluid channel respectively, the noble metal particles are arranged in the flexible layer, and the flexible layer is made of a transparent material. During application, fluid flows in the fluid channel, the flexiblelayer is bent outwards under pressure, the distance between the noble metal particles is changed, the surface plasmon resonance wavelength of the noble metal particles is changed, and flow velocity detection is achieved by detecting the surface plasmon resonance wavelength of the noble metal particles. The device has the advantage of high flow velocity detection precision.

The invention provides a vehicle body spatial position intelligent detection device and method and application thereof. Specifically, the information of each trolley is read through an RFID reader-writer, and then the information is compared with the information detected by a laser correlation photoelectric switch; if consistent, the detection is passed; and if inconsistent, the position and the mounting condition of a coating workpiece on the transport trolley along the vertical direction can be obtained through the triggering condition of the n laser correlation photoelectric switches; the position of the coating workpiece in the horizontal direction can be obtained through the triggering conditions of m proximity switches, meanwhile, an alarm is given, and a conveying chain of the section is stopped, thus facilitating confirmation by the production personnel, and preventing waste of manpower, energy and the like caused by collision, scrappage and re-spraying due to poor workpiece feeding or poor hanging tool flowing into coating; compared with a purely-used visual system, the device is simple, good in reliability, high in flexibility, low in cost and convenient to maintain; theplurality of proximity switches are arranged on the transport line, multi-point detection can be achieved, and the transverse fault-tolerant capacity is high.

The invention discloses a slot type multi-point insulation detection device and method of an insulated operating rod. The device comprises a detection module and multiple slot type electrodes, and theslot type electrode is used to hold the insulated operating rod; and the detection module comprises a test power supply, a current detection unit and a microprocessor, the test power supply comprisesa DC power supply U0 and a high frequency interference resistant circuit, a voltage output by the DC power supply passes the high frequency interference resistant circuit and then a constant voltageis applied between two adjacent slot type electrodes, the current detection unit detects a current between the two adjacent slot type electrodes, and the microprocessor calculates the insulation resistance of part, between the two adjacent slot type electrodes, of the insulated operating rod according to the voltage of the DC power supply U0 and the current detected by the current detection unit.On the premise that an operator needs not to translate or rotate the insulated operating rod, insulation detection is carried out on the full surface of the insulated operating rod, and friction losscaused by measurement of the insulation resistance is avoided.

The invention discloses a radar exploration device for detecting the internal structure of an object and relates to the technical field of geological exploration. The radar exploration device comprises an annular guiding member, at least two radar monitoring components, an annular guiding mechanism and a lifting mechanism, wherein the at least two radar monitoring components are installed on the inner wall of the annular guiding member and each comprises a box body, a transmitter and a receiver; the transmitter and the receiver are both mounted on the box body, are oriented to the object to bedetected, and are connected to a computer through wire harnesses; each radar monitoring component is slidably connected in the annular guiding mechanism and is circumferentially movable around the axis of the annular guiding member; the annular guiding mechanism is mounted on the lifting mechanism and is movable up and down along the axis of the annular guiding member. The radar exploration device detects the interior of the object with a curved surface, and is high in detection accuracy, simple in structure and convenient to operate.

The invention discloses a fiber bragg grating strain detection device which comprises a base, a supporting frame is movably installed on the base, a mounting base is connected to the end, deviating from the base, of the supporting frame, and a driving chamber is fixed to the upper end face of the mounting base. According to the fiber bragg grating strain detection device, vertical feeding of the fixing base is controlled through a lifting lead screw, the distance between the fiber bragg grating and the pressurizing block is convenient to adjust, and therefore the fiber bragg grating strain detection device is suitable for detection of fiber bragg gratings of different specifications; an eccentric wheel is driven to operate through meshing of a worm wheel and a worm, the feeding amount of the pressurizing plate is conveniently controlled, and detection precision is improved; a limiting block is arranged in a limiting groove, so that the clamping force of the fiber bragg grating is convenient to control, and damage is avoided; through cooperation of a guide rod and a guide spring, the fixed seat operates stably and is convenient to adjust; in addition, the straight movement of the mounting base is controlled through the feeding screw rod, so that the relative positions of the pressurizing block and the fiber bragg grating are conveniently controlled, and multi-point detection is realized.

The invention discloses an oil pan capable of automatically detecting engine oil. The oil pan comprises an oil pan body, an engine oil detector and a hard coil pipe, wherein the hard coil pipe comprises a pipe body and a plug; the pipe body is fixed on the top surface of the oil pan body, and a plurality of through grooves are formed in the outer wall of the pipe body; one end of the pipe body isclosed, and the other end of the pipe body is connected with the plug; the engine oil detector comprises a detector main body, a wire, a detection head, a permanent magnet, electromagnets and a guiderope; one end of the wire is connected with the detector main body, and the other end of the wire penetrates through the oil pan body and the plug in sequence, then extends into a channel of the pipebody and is connected with the detection head; the permanent magnet is positioned in the channel of the pipe body and is connected with the detection head through the guide rope; the plurality of electromagnets are respectively arranged on the outer wall of the pipe body; and a central controller in the detector main body is provided with a communication module and is electrically connected with avehicle body controller of a vehicle. The condition of the engine oil in a crankcase can be monitored in real time.

The invention discloses a self-lubricating gear meshing transmission thermal analysis test bench, and belongs to the field of gear detection. The test bed comprises a test bed bottom plate, a self-lubricating gear driving device, a test bed lower guide rail, an imaging device and a self-lubricating gear load device. According to the device, free movement of the self-lubricating gear driving device and the self-lubricating gear loading device can be realized through the translation guide rail, so that gears with different size parameters can be replaced for testing, the thermal infrared imager and the high-speed camera can move along the camera annular slide rail, and three-dimensional detection of the gear meshing process is realized; the thermal infrared imager is used for detecting the heat generation and heat dissipation processes in the meshing transmission process of the self-lubricating gear, and the high-speed camera is used for observing the tooth surface thermal deformation and abrasion conditions in the high-speed meshing transmission process of the self-lubricating gear. According to the technical scheme, the heat generation and dissipation process and the high-speed meshing process of self-lubricating gears of different working conditions, different sizes and different types can be detected, and research and design of novel self-lubricating gears are facilitated.