806results about How to "The detection data is accurate" patented technology

The invention discloses an insulation monitoring device and method of a power cell of an electric vehicle. The insulation monitoring device comprises an electricity leakage detection circuit, a microprocessor, a signal generator and a signal collector, wherein the signal generator is connected with the chassis of the electric vehicle and the signal collector is connected with a sampling resistor. The signal generator is used for generating low-frequency voltage signals, and the signal collector is used for collecting voltage signals on the sampling resistor and transmitting the voltage signals to the microprocessor through a signal conditioning circuit; because the current flowing through the sampling resistor is the sum of the leakage current of the high-voltage system of the power cell and current generated by a low-frequency voltage signal transmitted by the signal generator, the microprocessor calculates an insulation resistance of a high-voltage system of a power cell on the chassis of the electric vehicle according to a current variation value; and when the insulation resistance of the high-voltage system of the power cell on the chassis of the electric vehicle is reduced to a preset response value, the microprocessor drives an alarming device to open and reminds a user to quickly carry out fault diagnosis, therefore ensuring the regular operation of the power cell and avoiding the potential safety hazard due to drop of insulation.

The invention relates to equipment for testing the bending and torsion resisting performances of an electrical insulator. The equipment is characterized in that: the equipment comprises a slewing worktable, an upright post, a cross beam assembly and a lifting driving mechanism; the upright post is vertically fixed above the slewing worktable; the lifting driving mechanism arranged at the top end of the upright post comprises a screw rod, a speed reducer and a lifting coder; the screw rod is connected with a screw rod nut in the upright post, the top part of the screw rod is connected with the speed reducer, a linear guide rail is arranged on the side wall of the upright post, and the cross beam assembly is connected with the upright post by the linear guide rail in a sliding manner; a bending pressure head, a bending load sensor, a bending displacement coder and a torsion block are arranged on the cross beam assembly; a bending oil cylinder is connected at the rear of the bending pressure head, the bending displacement coder is arranged on the bending oil cylinder, a torsion load sensor is arranged on the torsion block, and the position of a groove of the torsion block is corresponding to that of a test piece fixing seat on the slewing worktable. With the characteristics of saving space and being convenient for use, the equipment can accurately detect the bending and torsion resisting performances of the electrical insulator.

The invention relates to a system and a method for detecting detectivity of a space optical system. The system comprises a light source system, an alignment system, a star point unit, a spectrum acquisition unit, a master control system, a data processing unit and a display unit, wherein the alignment system and the spectrum acquisition unit are arranged on an emitting optical path of the light source respectively; the star point unit is arranged between the light source system and the alignment system, and lies on a focal plane of the light source system; a space optical system to be detected is arranged on the emitting optical path behind the alignment system; the data processing unit is respectively connected with the display unit and the space optical system to be detected; and the master control system is respectively connected with the space optical system to be detected, the light source system and the spectrum acquisition system. The invention provides a system and a method for detecting detectivity of a space optical system, which are capable of reliably and accurately acquiring detection data and are convenient for operation.

The invention provides a laser radar light path system which is used in the field of laser radar ranging. The system comprises a transmitting system body and a receiving system body. The transmitting system body is used for transmitting laser signals to target objects; the receiving system body is used for receiving laser echo signals reflected from the target objects, and comprises a main receiving lens used for focusing the first laser echo signals reflected from the target objects, a compensating mirror and a photoelectric detector, wherein the compensating mirror is arranged on the main receiving lens and used for compensating the second laser echo signals reflected from the target objects in a measuring blind zone of the main receiving lens, and the photoelectric detector is used for receiving the focused first and second echo signals and outputting corresponding electrical signals so as to obtain distance information of the target objects. Ranging of far objects and ranging of close objects can be achieved at the same time by arranging the compensating mirror on the main receiving lens, the detection range is larger, the detection data is more accurate, and the radar measuring blind zone caused by a non-coaxial optical system can be eliminated.

The invention discloses a wearing state detecting method for intelligent wearable equipment. The method comprises the following steps of acquiring a non-wearing reference value by the intelligent wearable equipment; reading a contact capacitance value between the intelligent wearable equipment and a user when the user gets in contact with the intelligent wearable equipment during each cycle every other predetermined period of time, and calculating a difference value between the contact capacitance value and the non-wearing reference value; if the difference value is within a first preset range during a predetermined wearing detection times, judging the intelligent wearable equipment to be in the wearing state. The invention also discloses a wearing state detecting device for the intelligent wearable equipment. According to the invention, the wearing state of the intelligent wearable equipment is accurately detected, so that accurate detection data are provided. Therefore, the user experience is improved.

The invention provides a metro gauge detecting system and a detecting method thereof and belongs to the field of urban mass transit gauge detection. The metro gauge detecting system comprises a data processing analyzing system and an image collecting system 10, a vibration compensation system and a positioning system which are respectively connected with the data processing analyzing system. The accuracy and precision can be both increased by the measurement of the metro gauge detecting system in each section of road; the system error is reduced; the control on the system is excellent; the manpower resource and the material resource are simultaneously saved; the efficiency is increased; and the metro gauge detecting system is suitable for high-speed and real-time detection requirement.

The invention relates to a beef quality rapid detection system and detection method to solve the problems of subjective and inaccurate detection of beef quality and complex detection process of detection equipment in the prior art. The system comprises a seat body, the seat body is provided with a bracket, and an irradiation light source is arranged above the bracket. The irradiation light source is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is installed on the seat body. A receiving mechanism is disposed below the bracket, and a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef quality can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention provides an artificial intelligence-based food flavor sensory evaluation system and an establishment method thereof. The food flavor sensory evaluation system comprises a component sensory detection system, a computer intelligent analysis system and a food flavor database, wherein the component sensory detection system consists of a GC-MS and a GC-O; the GC-MS is used for obtaining flavor feature original data of foods; the GC-O is used for obtaining artificial sensory evaluation data of food flavors; the computer intelligent analysis system is used for performing preprocessing and feature extraction on the flavor feature original data and the artificial sensory evaluation data, and performing dimension reduction and clustering analysis on the original data; and the food flavor database is established by performing fitting analysis on the flavor feature original data and the artificial sensory evaluation data obtained by the sensory detection system by a computer, combines the flavor original data and the artificial evaluation data, and comprises various data of mutual association of food volatile components. The instrument analysis is combined with the human body sensory evaluation, so that the one-sidedness and the defect of manual repetitive detection in an existing food flavor detection method are overcome, and an evaluation result is more comprehensive and reliable.

The invention discloses a smart watch capable of detecting blood pressure. The smart watch comprises a watch body having a smart component. The watch body is internally provided with a control mainboard, a display component and a measurement component. The measurement component comprises a blood pressure detection chip. The lower end surface of the watch body is provided with a watchband. A plane is formed at the connecting part of the watchband and the watch body. The external side surface of the lower end of the plane is provided with a silicone gasket. The blood pressure detection chip is installed in the silicone gasket, and the signal output end of the blood pressure detection chip is connected with the control mainboard. The plane is internally provided with a watchband tightening component which is controlled by the control mainboard. The lower end surface of the silicone gasket is contacted with the human skin, and blood pressure of the human body is detected by the blood pressure detection chip and blood pressure signals are transmitted to the control mainboard. One retractable watchband is used and then flexible adjustment of the size of the watchband can be realized so that the conventional connecting buckle structure is replaced, the blood pressure detection chip is arranged in the watchband, the detection sensitivity of the blood pressure detection chip is adjusted and controlled in a tightening way and thus the detection data are enabled to be more accurate.

The invention provides a gas valve provided with a pressure measuring device, pertaining to the technical filed of machinery and solving problems such as small application scope caused by inconvenient pressure measurement as the pressure measuring device of the current gas valve provided with a pressure measuring device cannot rotate. The gas valve provided with the pressure measuring device consists of a valve body provided with an air inlet pipe and an air outlet pipe, a valve stem and a valve core which is arranged in the valve body. One end of the valve stem is connected with the valve core while the other end thereof passes through the valve body; the air inlet pipe is provided with a pressure measuring hole, the outside of the air inlet pipe is provided with the pressure measuring device, a valve sleeve is arranged and axially fixed on the air inlet pipe and can rotate along circumferential direction, the pressure measuring device is fixedly connected with the valve sleeve, and a connection structure which ensures that the valve sleeve and the air inlet pipe are mutually sealed and that the pressure measuring hole and the pressure measuring device are always communicated when the valve sleeve rotates along the air inlet pipe in a circumferential manner is positioned between the valve sleeve and the air inlet pipe. The gas valve provided with the pressure measuring device is characterized by simple structure, good sealing performance, wide application scope and being capable of measuring the pressure of the gas of the pipe at any angle.

The invention relates to a fast and accurate beef quality detection system and method to solve the problems of subjective and inaccurate detection of beef quality and complex detection process of detection equipment in the prior art. The system comprises a seat body, the seat body is provided with a bracket, and an irradiation light source is arranged above the bracket. The irradiation light source is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is installed on the seat body. A receiving mechanism is disposed below the bracket, and a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef quality can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention discloses a polymorphic sampling system and method for sulfur trioxide in exhaust of a stationary pollution source. The polymorphic sampling method comprises the following steps: according to the form of SO3 in the exhaust, based on a selective condensation principle, collecting aerosol-state SO3 in the exhaust by adopting a front-stage collector under the temperature of the exhaust; and enabling the temperature of the exhaust flowing in a rear-stage collector to be reduced below an acid dew point through a water bath or water bath circulation so that the original gaseous SO3 under the temperature of the exhaust is transformed into the aerosol-state SO3 to be deposited in the rear-stage collector so as to realize the purpose that the aerosol-state SO3 and the gaseous SO3 are respectively measured. According to the scheme provided by the invention, the aerosol-state SO3 and the gaseous SO3 in the exhaust can be distinguished, and respectively quantified; a proportion of the aerosol-state SO3 to the gaseous SO3 is calculated, and the total concentration of the SO3 can also be measured. The measured concentration of the aerosol-state SO3 and the gaseous SO3 under the temperature of the exhaust provides basic data for researching acid corrosion at the tail of a boiler; meanwhile, the polymorphic sampling system can be applied to detection of SO3 emission concentration of exhaust of other pollution sources.

The invention relates to a gas detector, in particular to a portable photo-ionization gas detector, which solves the problems of low detection accuracy and flexibility existing in the prior photo-ionization gas detector. The detector comprises an electrodeless ultraviolet lamp and an ionization chamber of which the inside is provided with two offsetting electrode plates and a collecting electrode plate, wherein the ionization chamber is fixedly provided with a gas inlet end cover and provided with a gas outlet, the electrode plates in the ionization chamber are arranged in parallel and front faces of the electrode plates face each other, and are parallel to a light-transporting direction of the electrodeless ultraviolet lamp; the distance between the two offsetting electrode plates is equal to the height of an optical window of the electrodeless ultraviolet lamp, and the collecting electrode plate is arranged between two offsetting electrode plates; the gas inlet end cover is provided with a gas inlet window where a metallic micro dust filter net and a double-layer microporous filter membrane are arranged. The gas detector has the advantages of simple and reasonable structure, small volume, convenient carrying, accurate detection data, high flexibility and wide application range; moreover, gas detector also meets the real-time and continuous detection requirements in the operating field.

The invention discloses a wearing state detecting method of an intelligent wearable device. The method comprises the following steps that the temperature value detected by the intelligent wearable device and the capacitance value generated through contact between the intelligent wearable device and the user skin are obtained; and if the temperature value and the capacitance value meet the preset conditions within the preset number of wearing detection times, it is judged that the intelligent wearable device is in the wearing state. The invention further discloses a detection device and an air conditioner. The wearing state of the intelligent wearable device is comprehensively judged through capacitance detection, and the environment temperature or skin temperature detected by the intelligent wearable device, accordingly, accurate detection data can be provided, and the user experience is improved.

A detection device of a multi-layer nanometer film tunneling micro-gyroscope consists of a glass substrate, a fixed electrode cathode, a comb electrode anode, a sensitive mass block, a fixed seat, a fixed comb, a damping hole, a detection beam, a driving beam, a connecting block, a tunneling device, and a nano film, wherein a fixed seat and a comb are mounted on the sensitive mass block, the detection consists of the detection beam, the driving beam and the tunneling device, the tunneling device consists of a substrate, an insulating layer, an electrode and a nano film, the fixed electrode cathode and the comb electrode anode are mounted on the glass substrate, the damping hole comprises 96 square via holes, the tunneling device can form a multi-barrier pressure sensitive structure because of the nano film, and the sensitivity of the silicon piezoresistive pressure sensor can increased by 1-2 order of magnitude. The device has reasonable and compact structure, convenient detection, high detecting precision, high sensitivity and high resolution, which is not effected by temperature. Compared with prior art, the detection precision is increased by 2-3 times, the detection data is detailed, accurate and reliable.

The invention relates to the field of agriculture, in particular relates to the field of utilization of straw, and more in particular relates to a detection method of a straw phenolic acid compound. In accordance with main phenolic acid substances in straws from different sources, namely gallic acid, protocatechuic acid, gentisic acid, p-hydroxybenzoic acid, chlorogenic acid, vanillic acid, caffeic acid, syringic acid, p-coumaric acid, ferulic acid, sinapic acid and salicylic acid, a reverse-phase high performance liquid chromatography detection method which is capable of achieving separation and detection in one time in a relatively comprehensive manner is disclosed, and the method can be used for keeping the relative standard deviations (RSD) of retention times and peak areas of 12 phenolic acids respectively within 0.01-0.1% and 0.25-2.26%, showing good reproducibility; the minimum detection limit is 0.005-0.01ug / ml; and the method is reliable and effective.

The invention provides a measuring device used for measuring the volume elastic modulus of a solid buoyant material. The measuring device comprises a bearing device, a pressure-regulating deice and a measurement control device. The bearing device comprises a hydraulic cylinder and a hydraulic cylinder cover; a pressure meter and a pressure-regulating valve are arranged on the upper part of the hydraulic cylinder cover; the pressure-regulating device comprises a hydraulic pump and a corresponding plunger; the lower end of the hydraulic pump is communicated with a water supply; the upper end of the plunger is connected with a motor; the measurement control device comprises a programmable controller, a pressure sensor and a linear scale; the pressure sensor and the pressure meter are arranged on a pipeline communicating the hydraulic cylinder and the hydraulic pump; the finger of the linear scale and the plunger moves synchronously; and the pressure sensor, linear scale and motor all can be controlled by the programmable controller. The invention also discloses a test method used for solving the problem in the prior art that the volume elastic modulus cannot be measured. The invention is provided with the guidance for the study of solid buoyant material.

The invention relates to a telecontrol channel on-line detecting system of a scheduling automatic system, which comprises an analog channel detecting module, a digital channel detecting module and a network channel detecting module, and the output of the three detecting modules is input into a computer through a converting circuit. The invention aims at the problem of telecontrol detection with delay to provide the channel detecting system controlled by the computer, and the quality and the index of a telecontrol channel can be detected on line at any moment. The system detects an analog channel by a loop channel method, detects a digital channel by an accessory channel method and detects a network channel by a server landing method, and then, detecting results are collected to the computer, are controlled by a program instruction and are programmed by adopting high-level languages. The telecontrol channel on-line detecting system has the advantages of visual operation interface, simple and novel detecting method, accurate detecting date and high detecting speed and can complete fault detection in one minute.

The invention discloses a metal plate defect online detection method and metal plate defect online detection device. Based on the fact that the heat conductivity of a homogeneous metal plate and the heat conductivity of internal holes, air bubbles or other impurities are different and the fact that the metal plate has a higher heat conductivity and higher heat conducting speed, when the metal plate is instantly sprayed with a cooling or heating medium at a certain temperature, the part, without defects, of the metal plate can restore the temperature quickly and has a uniform infrared image and no abnormal spots, while the part with defects of internal holes, air bubbles or impurities have abnormal spots due to the deference between the heat conductivity of the holes, air bubbles or impurities and the heat conductivity of the metal plate. The metal plate defect online detection device consisting of thermal infrared imagers, a cooling or heating medium spraying or blowing device and a digital program control device synchronously performs control, captures an infrared image and compares and analyzes the obtained infrared image at a fixed time according to preset process steps and canaccurately and conveniently detect the defects including through holes in the metal plate on line.

The invention relates to a rail vehicle body structure large-size component fatigue test method and device. A finite element model simulation technology is utilized to simulate test conditions of a vehicle body structure member to be tested under the fatigue state of the whole vehicle so that steps of test loading conditions of the vehicle body structure member to be tested are confirmed; and corresponding loads are applied to the vehicle body structure member to be tested according to the test loading conditions obtained in the last step, and fatigue strength is detected. The method combining simulation analysis and test is adopted, and welding seam fatigue strength of stainless steel vehicle body structure large-size components like a side wall is rapidly and accurately tested so that operation is simple and feasible. With application of the test technology, accurate detection data can be provided, large amounts of real and effective test data can be accumulated, and analysis and research of vehicle fatigue safety and reliability are facilitated so that powerful basis is provided for vehicle fatigue safety and reliability.

The invention discloses a breather valve positive-negative opening pressure online detecting device. The device comprises a vacuum pressure cover, a pressure stabilizing tank, an adjusting valve, a gas flow meter, a vacuum pump or an air compressor and the like. The vacuum pressure cover can directly cover the outer side or the inner side of a breather valve to be measured so as to enable the breather valve to be measured to form closed space under positive-pressure or negative-pressure condition; the adjusting valve and the gas flow meter are arranged between the vacuum pressure cover and the pressure stabilizing tank; the pressure change in the vacuum pressure cover is controlled by the adjusting valve; the gas flow meter records the leakage in pressure opening; the pressure stabilizing tank is connected with the vacuum pump or the air compressor; and the vacuum pump or the air compressor enables the pressure in the pressure stabilizing tank to reach a certain vacuum pressure value before testing. The device realizes detection of performances of the oil tank breather valve under online condition, prevents disassembly of the breather valve and adjustment of the pressure in a tank, can realize detection of positive-negative pressure opening pressure of the breather valve by single vacuum pump or air compressor, greatly improves the detecting efficiency and safety, and is simple in structure, convenient for operation method, wide in adaptation range and stable and accurate in detecting data.

The invention relates to a micro-mechanical gyroscope, in particular to an electromagnet driven gyroscope based on a nanometer film quantum tunneling effect, solving the problem of the existing micro-mechanical gyroscope that an applied drive mode, an applied detection mode and the structures corresponding to the drive mode and the detection mode limit the performance of the gyroscope to be further improved. The gyroscope comprises a carrier plate embedded with a permanent magnet and a gyroscope tube core, wherein the gyroscope tube core is internally enveloped with a gyroscope sensitive mechanism which comprises a support frame body, a glass base plate, a composite beam and a mass block; the composite beam is formed by a detection beam and pentacle-shaped drive beams symmetrically positioned at the two sides of the detection beam; the connection place between the detection beam and support frame body is provided with a nanometer film quantum tunneling apparatus; the mass block is provided with a feedback lead wire and a drive lead wire; a connection lead wire at the two ends of the feedback lead wire and the drive lead wire, which is positioned along the composite beam, is connected with a lead wire pad corresponding to the support frame body. The gyroscope has simple, rescannable and compact structure, is suitable for microminiaturization, and greatly improves performance parameters such as sensitivity, and the like, compared with the existing micro gyroscope.

The invention relates to a beef freshness rapid detection system and method to solve the problems of subjective and inaccurate detection of beef freshness and complex detection process of detection equipment in the prior art. The system comprises a seat body, the seat body is provided with a bracket, and an irradiation light source is arranged above the bracket. The irradiation light source is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is installed on the seat body. A receiving mechanism is disposed below the bracket, a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef freshness can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention relates to a full-automatic lock cylinder assembling machine and an assembling method adopting the same. The machine comprises a rack, a disk, a rotating mechanism, a lock cylinder feeding mechanism, a spring assembling mechanism, a key bit identification mechanism, lock plate assembling mechanisms, a key inserting mechanism and a product classifying mechanism; the rotating mechanism is mounted inside the rack; a lock cylinder fixing seat is fixedly mounted above the disk; the disk is located above the rack; the rotating mechanism drives the disk to rotate; and the disk drives the lock cylinder fixing seat to change stations to sequentially pass through the lock cylinder feeding mechanism, the spring assembling mechanism, the key bit identification mechanism, the lock plate assembling mechanisms, the key inserting mechanism and the product classifying mechanism. The overall structure is reasonably designed, the disk drives the lock cylinder fixing seat to change the stations to sequentially pass through the lock cylinder feeding mechanism, the spring assembling mechanism, the key bit identification mechanism, the lock plate assembling mechanisms, the key inserting mechanism and the product classifying mechanism, all the mechanisms work cooperatively to complete corresponding procedures respectively, lock cylinders are assembled quickly, the production speed is high, and the automation degree is high.

The invention discloses an LED on-line detection control system for detecting and controlling all display terminals on line, which comprises a display unit, a control unit, a detection unit and a judging unit; the control unit is connected with all elements of the display terminals for sending control signals; the detection unit is connected with all elements of the display terminals for detecting the circuit parameters and the signal parameters of all the elements to generate detection data; the judging unit is provided with a first judging module and a second judging module; the first judging module is used for judging whether connection faults or unit faults occur according to the detection data; the second judging module is connected with the first judging module for judging whether signal faults occur; the control unit generates fault state data according to the judging results; and the display unit serves as a man-machine operation display interface for sending video files, receiving the fault state data and displaying the fault states. The LED on-line detection control system has the advantages of precise detection data, accurate judging results, good detection effect and high control intelligent level.

The invention discloses a pulling tool capable of generating power of a pipeline detector, and the pulling tool is used for pulling the pipeline detector. The pulling tool consists of a supporting body, a power generating system and a speed regulating system, wherein the two ends of a framework are provided with leather cups to form the supporting body; a motor is sequentially connected to a speed reducer and a speed regulating valve so as to form the speed regulating system with a speed sensor and a control unit; a pressing wheel mechanism, a power generator gearbox and a power generator are sequentially connected so as to form the power generating system with a storage battery. The control unit, the power generator, the storage battery and the motor are sealed in a sealed cabin; and the sealed cabin is mounted in the framework. Under the action of a tension spring, a pressing wheel clings to a pipeline inner wall; when a fluid in a pipeline drives the pulling tool to move, the pressing wheel is driven to rotate, and the power generator is driven to generate powder after the speed of the pulling tool changes, and the electric energy is stored in the storage battery. Under the action of the speed regulating system, the whole detector is almost stable in operation speed, so that the detection data is more precise and reliable; and meanwhile, in the operation process of the detector, the power generating system is always in a power generating state, so that sufficient electric quantity is provided for the whole detector.

The invention provides a device and method for testing the noise immunity of a power frequency magnetic field of an electric energy meter. The device comprises a 0.02 level standard equipment cabinet, an exciting current source and an automatic coil overturning device. The automatic coil overturning device comprises a proximate matter frame, a motor driving device, an electric energy meter rotating mechanism and an electromagnetic coil. The exciting current source is placed on the bottom layer of the automatic coil overturning device. An automatic power frequency magnetic field detecting coil module is placed inside the automatic coil overturning device. The method includes the steps that (1) a working power supply is supplied to the electric energy meter by a 0.02 level power source, and the electric energy meter is placed on a tray; (2) electricity is supplied to the coil by the exciting source; (3) the coil is driven by a motor to rotate; (4) test data are uploaded to a computer, so that a test is completed. According to the device and method, the degree of automation is high, the reliability of the test data is greatly improved, the automation verification of the electric energy meter can be achieved, manual intervention is needless, the test data are accurate and reliable, and the performance is stable.

The invention relates to a fast and accurate beef quality detection system and method to solve the problems of subjective and inaccurate detection of beef quality and complex detection process of detection equipment in the prior art. The system comprises a seat body, which is provided with a bracket. An irradiation light source is disposed over the bracket and is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is mounted on the seat body. A receiving mechanism is disposed below the bracket, and a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef quality can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention discloses a dynamic adsorption toxic gas detection device. According to the invention, compressed air is delivered into one of the gas inlets of a gas mixer through an air purifier, a gas humidity regulator, an electronic thermometer / hygrometer, and a gas flowmeter; an outlet of a toxic gas source communicates with a second one of the gas inlets of the gas mixer. The gas outlet of the gas mixer communicates with a gas inlet of a toxic gas concentration detector and a gas inlet of a toxic gas absorption filter. The outlet of the toxic gas absorption filter is connected with a penetration concentration detector. The gas humidity regulator, the electronic thermometer / hygrometer, and the gas flowmeter form an air flow rate and air humidity regulation circuit. The toxic gas concentration detector, the toxic gas absorption filter, and the penetration concentration detector form a dynamic absorption and toxic gas detection circuit. The device provided by the invention has the advantages of simple structure, convenient operation, and precise detection data. With a waste absorption device, pollution to the atmosphere and harm to operators caused by residual toxic gas are avoided.

The invention relates to a green tea quality analysis apparatus based on an intelligent electronic nose system, and a method. In the prior art, detection on volatile gases in beverage samples is performed through human body organs, such that technical problems of subjective difference and harm on human body exist. A purpose of the invention is to solve the technical problems in the prior art. The apparatus comprises a gas collection unit, a gas sampling unit, a treatment unit and a control unit, wherein the gas collection unit comprises a gas chamber, a sample chamber, a first communication pipe and a second communication pipe, the gas chamber, the sample chamber, the first communication pipe and the second communication pipe form a loop-shaped circulation path, the gas sampling unit is connected with the gas chamber, the treatment unit and the gas sampling unit are connected, and a gas inlet mechanism, a gas outlet electromagnetic valve and the gas sampling unit are respectively connected with the control unit. According to the present invention, the electronic nose system is built, such that the detection result is comprehensive and objective, and hazard of sample gas on human health is avoided; and gas is subjected to circulation flow during gas sampling, such that gas mixing is uniform, and detection data is accurate.