99 results about "Hydrogen sulfide sensor" patented technology

A hydrogen sulfide sensor is made from a metal acetate film, such as a thin film of copper acetate, formed on a set of monitoring electrodes, by evaporation of a metal acetate aqueous solution disposed on the electrodes, for detecting a weak gas, such as hydrogen sulfide, carried in a gas carrier, such as a nitrogen carrier, for detecting low concentration of the weak gas, such as ten ppm, when the conductivity of the film changes by several orders of magnitude, that produces a metal sulfide, such as copper sulfide, that is a good electrical conductor at room temperature, for example, as the metal acetate is converted directly to a metal sulfide upon exposure to hydrogen sulfide.

A method can be adapted for design and preparation of a matrix nanocomposite sensing film for hydrogen sulphide SAW / BAW detection at room temperature. A matrix nanocomposite can be synthesized by incorporating both single-wall and multi-wall thiolated carbon nanotubes into conductive organic polymers or ceramic nanocrystalline in a properly functionalized manner. A thin organic sensing film can be prepared based on the matrix nanocomposite. The matrix nanocomposite sensing film can be prepared on a surface of a SAW / BAW device by an additive process or a direct printing process. Finally, the sensing film can be consolidated by thermal annealing or laser annealing under ambient conditions in order to obtain the stable sensing film with higher sensitivity and electrical properties for a SAW / BAW based H2S sensor.

The invention relates to the intelligent wearable equipment field and particularly relates to a human status and behavior monitoring alarm system. The human status and behavior monitoring alarm system comprises a main chip, a display, a humiture sensor, a blood pressure sensor, a brain wave sensor, an electronic gyroscope, a heart rate sensor, a pressure sensor, a hydrogen sulfide sensor, a noise detection module, a Bluetooth module and a power supply module. The human status and behavior monitoring alarm system can monitor a human health status and can further monitor a human behavior status.

A sensor made from a metal salt film, formed on a set of monitoring electrodes, by evaporation of a metal salt aqueous solution disposed on the electrodes, is used for detecting a weak acid. Low concentrations of the weak acid, such as ten ppm, are indicated as the conductivity of the film changes by several orders of magnitude, as a result of reaction of the weak acid with the metal salt, as the metal salt converts to a metal reaction product upon exposure to the weak acid.

The invention belongs to the field of coal mine production safety. A purpose of the present invention is to solve the problem of high sulfur coal mine underground hydrogen sulfide so as to ensure the safe production of coal mine. The present invention discloses an agent for rapidly removing the high sulfur coal mine underground hydrogen sulfide gas. The agent adopts sodium carbonate as an alkaline absorbent, and is characterized in that: the agent further comprises a chloramine-T adopted as a catalytic oxidizing agent; the sodium carbonate and the chloramine-T are prepared into a solution according to a sodium carbonate mass fraction of 0.15-0.3% and a chloramine-T mass fraction of 0.3-0.5%. The invention further discloses a device for rapidly removing the high sulfur coal mine underground hydrogen sulfide gas. The device comprises four parts of a hydrogen sulfide sensor (1), a sensing switch (2), an alarm device (3) and a mist sprayer (4), wherein the agent described in the claim 1 is stored in the mist sprayer. With the device, the absorbent can be dispersed into particles with the extremely small particle sizes, such that the agent adequately contacts the hydrogen sulfide gas so as to improve the absorption efficiency.

The invention discloses a YSZ (yttria-stabilized zirconia)-based mixed potential type hydrogen sulfide (H2S) sensor with La2NiO4 used as a sensitive electrode and a method for preparing the YSZ-basedmixed potential type hydrogen sulfide sensor, and belongs to the technical field of gas sensors. The YSZ-based mixed potential type hydrogen sulfide sensor is mainly used for detecting toxic gas H2S in industrial production and daily life. The YSZ-based mixed potential type hydrogen sulfide sensor sequentially comprises an Al2O3 ceramic plate with Pt heating electrodes, a YSZ-based plate, a Pt reference electrode and the La2NiO4 sensitive electrode. The reference electrode and the sensitive electrode are independently and symmetrically prepared at two ends of the upper surface of the YSZ-basedplate, and the lower surface of the YSZ-based plate is adhered with the Al2O3 ceramic plate with the Pt heating electrodes. The YSZ-based mixed potential type hydrogen sulfide sensor and the method have the advantages that the La2NiO4 with high electrochemical catalytic activity is used as the sensitive electrode, the quantities of citric acid and the like which are added in material synthesis procedures are changed, accordingly, the electrochemical catalytic activity of sensitive electrode materials can be enhanced, and effects of improving the sensitivity characteristics of the YSZ-based mixed potential type hydrogen sulfide sensor can be realized; a short temperature pulse is applied in sensor recovery procedure, accordingly, the recovery time of the YSZ-based mixed potential type hydrogen sulfide sensor can be shortened, and the purpose of enhancing the response and recovery characteristics of the YSZ-based mixed potential type hydrogen sulfide sensor can be achieved.

An environment controller for livestock and poultry breeding or similar purposes comprises a control circuit. House inner temperature and humidity and harmful gas are collected in real time through a temperature sensor, a humidity sensor, a carbon dioxide sensor, an ammonia gas sensor and a hydrogen sulfide sensor which are arranged in a livestock and poultry house. According to the preset temperature or humidity or harmful gas control points in a single chip microcomputer by a user, when data collected by the sensors are higher than or lower than the set control points, the controller controls opening of a fan, a small ventilation window, a roller blind, a wet curtain and a heating device in the livestock and poultry house for adjusting through relays, so that the data are in the set control points, and accordingly the requirements for livestock and poultry growing environments can be well met. Each relay can control turning on and off of an equipment device independently. The controller can be connected with a computer through an RS485 serial interface, network monitoring is achieved, a user can know about the operation situation of equipment in the livestock and poultry house through the Internet at any time in any place and various environment data collected in the controller, and the management efficiency of the user is greatly improved.

The invention discloses an intelligent safety helmet based on 5G. A 5G high-speed communication chip is arranged in the intelligent safety helmet and supports full Netcom high-speed networking so as to implement real-time data transmission; an illumination temperature humidity sensor, a dust sensor, a combustible gas sensor, an oxygen sensor, a carbon monoxide sensor and a hydrogen sulfide sensorare arranged in the intelligent safety helmet so as to monitor an operation environment in real time; an audio and video acquisition module is arranged in the intelligent safety helmet and supports automatic video recording and automatic sound recording after startup so as to implement video real-time field monitoring; a system core module and a 5G communication module transmits environment information in real time to a cloud platform; after the cloud platform stores and analyzes collected data, the cloud platform compares the data with a set threshold and once the data reaches the set threshold, automatically sends a control instruction back to the system core module via a data transmission module, and illumination is automatically started up and stopped by the system core system, or a voice broadcasting module is started up to remind an operator. Terminals, such as a mobile phone, a computer and the like, can voluntarily access the cloud platform, background command staff knows the condition of an operation field in real time and makes the latest instruction, and the control instruction is directly transmitted to the system core module via a 5G network so as to carry out voice commanding or start up and stop illumination.

The invention relates to an online hydrogen sulfide detecting-alarming device especially used for fish holds of a fishing vessel, comprising a detecting-alarming host-processor arranged on a navigation bridge of the fishing vessel, a hydrogen sulfide sensor installing cover arranged on a soleplate of the detected fish hold and a hydrogen sulfide concentration probe which is provided with two synchronous-working semiconductor sensors inside and is connected with the detecting-alarming host-processor through a four-core signal cable. The alarming adopts an internal voice and indicator alarm to realize the automatic detection and hidden-trouble elimination. The host-processor has big capability and one host can be connected with four hydrogen sulfide concentration probes so as to realize the online detection and alarm to the hydrogen sulfide concentration of four fish holds. The online hydrogen sulfide detecting-alarming device has higher sensitivity and reliability in rigid environment and can adapt to the long-term online stable working in an actual severe environment of the fishing vessel, with constant service life of more than 12 months, simple installing process, convenient operation and concise alarming-indication meaning.

The invention provides an offshore wind turbine generator set and an environment control method thereof. The offshore wind turbine generator set comprises an environment control system. The environment control system comprises a hydrogen sulfide sensor, a hydrogen sulfide removing device and a controller, wherein the hydrogen sulfide sensor is arranged in a tower tube of the offshore wind turbinegenerator set and used for detecting the content of hydrogen sulfide in air in the tower tube; the hydrogen sulfide removing device is used for reducing the content of the hydrogen sulfide in the airin the tower tube; and the controller controls starting or closing of the hydrogen sulfide removing device according to the detected content of the hydrogen sulfide. According to the environment control system, the content of the hydrogen sulfide in the tower tube can be reduced, and thus the hydrogen sulfide gas cannot influence operation and maintenance staff and electrical components in the offshore wind turbine generator set.

The invention discloses an environmental safety monitoring system with the advantages that the cost is low, the safety is high, the field environment can be remotely monitored in real time, and emergency processing equipment such as warners, fans and the like are started in time. The environmental safety monitoring system is provided with a carbon monoxide sensor, an ammonia gas sensor, a hydrogen sulfide sensor, an iso-butane sensor, a temperature sensor, a humidity sensor, a methane sensor and an oxygen gas sensor, wherein the outputs of the sensors are connected with a single chip microcomputer, the output of the single chip microcomputer is connected with a ZigBee transmitting circuit, the output end of the single chip microcomputer is also connected with a field warning device, a field display and a driving executing circuit, and the output of the driving executing circuit is connected with emergency processing equipment. The environmental safety monitoring system is provided with a ZigBee router corresponding to the ZigBee transmitting circuit and a ZigBee coordinator corresponding to the ZigBee router, the output of the ZigBee coordinator is connected with an upper computer, and the upper computer is connected with a center warning device and a center display.

The utility model relates to the field of smart wearable devices, in particular to a human body condition and behavior monitoring alarm system. The human body condition and behavior monitoring alarm system comprises a master chip, a display, a temperature and humidity sensor, a blood pressure sensor, a brain wave sensor, an electronic gyroscope, a heart rate sensor, a pressure sensor, a hydrogen sulfide sensor, a noise detection module, a Bluetooth module and a power supply module. The human body condition and behavior monitoring alarm system is capable of monitoring both physical health conditions and behavior conditions of human bodies.

The invention discloses an electrochemical hydrogen sulfide sensor. The device comprises a shell with a detachable top cover, a top cover of the shell is provided with an air inlet hole for air to enter; a liquid storage tank is arranged at the bottom of the shell; a supporting plate covering the liquid storage tank is arranged at the top of the liquid storage tank; support plate with porous structure, a working electrode, a reference electrode and a counter electrode are sequentially stacked in the shell in the direction from the air inlet to the liquid storage tank; electrolyte is stored inthe liquid storage tank; a liquid absorbing material III is arranged in the liquid storage tank; the liquid absorbing material III is of a drum-shaped structure, a liquid absorbing material I is arranged between the working electrode and the reference electrode, a liquid absorbing material II is arranged between the reference electrode and the counter electrode, pins respectively connected with the working electrode, the reference electrode and the counter electrode are arranged at the bottom of the shell, and an O-shaped ring is arranged between the working electrode and a top cover of the shell. The sensor is not interfered by foreign gas, has good selectivity, and is simple in structure, low in manufacturing difficulty and low in cost. The invention also provides a preparation method ofthe electrochemical hydrogen sulfide sensor.

The invention relates to an integrated intelligent fermentation system and a method of livestock and poultry excrement and urine. The system comprises a fermentation chamber, a modification tank, turnover stirring device, a video monitoring system, a temperature and humidity sensor, a temperature sensor, an ammonia sensor, a hydrogen sulfide sensor, a PH (potential of hydrogen) sensor and a liquidlevel sensor. The video monitoring system transmits video frames to a central control room to achieve unmanned fully intelligent control of a whole fermentation process. The ammonia sensor, the hydrogen sulfide sensor, the PH sensor and the liquid level sensor transmit detection data to the central control room in real time; the central control room correspondingly adjust a fermentation progressaccording to a detection parameter; and the precise and intelligent control of the fermentation process is achieved. All field operation and remote monitoring of field situations can be truly achievedby a user beside a computer in an office. A safe and environment-friendly fermentation mode without waste gas emission or waste generation in the fermentation process is achieved; environmental pollution problems arising from the livestock and poultry culture excrement and urine are solved; reclamation utilization of waste is achieved; and the waste is into valuables.

The invention provides a method for detecting repeated heating of edible vegetable oil by use of an electronic nose. The method includes the steps of placing the edible vegetable oil into a sealing sample bottle to prepare a headspace sample; sucking headspace gas in the sample bottle with a sampling needle, injecting the headspace gas into a sampling port of the electronic nose and detecting the headspace gas by use of a provided gas sensor array, wherein the gas sensor array comprises a chlorine / fluorine / nitrogen / oxygen / ammonia compound sensor, an ethanol sensor, a hydrogen sulfide sensor, a methane / propane / butane sensor, a hydrocarbon compound sensor, a methylbenzene / xylene sensor and a combustion product sensor; and collecting numerical values acquired by the gas sensors, performing data analysis and constructing a model, thereby distinguishing whether the edible vegetable oil suffers from repeated heating. The sample treatment method is simple without any organic solvent, sample using amount is little, and rapid and nondestructive detection can be realized. Besides, the overall information of the sample is provided, and therefore, the method can be used for effectively distinguishing whether the edible vegetable oil suffers from repeated heating. The simple and rapid analysis and detection method is high in reliability.

The invention belongs to the field of intelligent nursing equipment, and concretely provides an intelligent diaper with a urine and excrement reminding function. The intelligent diaper comprises a surface layer (1), an absorption core layer (2), a pressure sensor (3), a bottom cloth layer (4), a temperature and humidity sensor (5), an electrode (6), a hydrogen sulfide sensor (7), a sulfur dioxide sensor (8), a signal conditioning circuit B (9), a single chip microcomputer (10), an LED (Light Emitting Diode) (11), a driving circuit (12), a loudspeaker (13), a case (14), a lithium battery (15), a voltage stabilizing circuit (16), a Wifi module (17) and a signal conditioning circuit A (18). Whether a diaper user urinates or defecates or not can be detected through multi-sensor information merging. If the detection result shows that the diaper user urinates or defecates, the reminding can be given to others through music playing by the loudspeaker or LED illumination; and reminding information and real-time temperature and humidity measuring data can be sent to a mobile phone user through Wifi. The intelligent diaper with the urine and excrement reminding function has the characteristics that the detection is accurate; and the use is convenient, and the like.

The invention belongs to an environment control system for a pigeonry. The environment control system for the pigeonry comprises an information collecting unit, an automatic control unit, an execution unit and a power supply unit. The information collecting unit comprises a camera, a temperature and humidity sensor, an illumination intensity sensor, a carbon dioxide sensor, an ammonia sensor and a hydrogen sulfide sensor, and is connected with the automatic control unit through a wireless network; the automatic control unit comprises a single-chip-microcomputer controller connected with the information collecting unit, a mobile terminal connected with the single-chip-microcomputer controller and a database server connected with the mobile terminal; the execution unit comprises a humidifier, a manure cleaning machine, a spraying sterilizer, a lighting lamp and a temperature-adjustable draught fan, and is connected with the single-chip-microcomputer controller; the power supply unit comprises a relay and is electrically connected with the automatic control unit and the execution unit through the relay. By means of the environment control system for the pigeonry, the inner environment of the pigeonry can be scientifically regulated and controlled, and labor is saved.

The invention discloses a gas monitoring device and method for carbon dioxide flooding gas channeling. The gas monitoring device is mainly composed of a carbon dioxide sensor, a carbon monoxide sensorand a hydrogen sulfide sensor, the carbon dioxide gas concentration, the carbon monoxide gas concentration and the hydrogen sulfide gas concentration can be collected in real time, all the gas sensors adopt electrochemical gas sensors or infrared gas sensors, infrared detection elements and electrochemical detection elements have the advantages of high stability and high precision, the gas concentrations can be transmitted to a terminal accurately while all the gas concentrations are collected in real time, the change of the content of all gas is displayed at the terminal, the gas channelingtime of carbon dioxide and the situation of changing of the gas channeling degree of the carbon dioxide along with the time are accurately monitored, and the gas monitoring device and method are of great significance for timely discovery and prevention of gas channeling.

The invention relates to the field of intelligent wearable devices, in particular to a body condition and behavior monitoring and warning system, comprising a main chip, a display, a temperature-humidity sensor, a blood pressure sensor, an electroencephalogram sensor, an electronic gyroscope, a heart rate sensor, a pressure sensor, a hydrogen sulfide sensor, a noise detection module, a Bluetooth module, and a power supply module. The body condition and behavior monitoring and warning system is capable of monitoring both health condition of a human body and behavior condition of the human body.

The invention discloses an on-line monitoring system of poultry house environmental sensors and a monitoring method thereof. The on-line monitoring system of the poultry house environmental sensors comprises an ammonia sensor, a carbon dioxide sensor, a hydrogen sulfide sensor, a temperature sensor, a humidity sensor, a light intensity sensor, a wind speed sensor, a normalization module, a filtration module and a noise reduction module. The ammonia sensor is used for detecting the ammonia content in a poultry house. The carbon dioxide sensor is used for detecting the carbon dioxide content inthe poultry house. The hydrogen sulfide sensor is used for detecting the hydrogen sulfide content in the poultry house. The temperature sensor is used for detecting the temperature in the poultry house. The humidity sensor is used for detecting the humidity in the poultry house. The light intensity sensor is used for detecting the light intensity in the poultry house. The wind speed sensor is usedfor detecting the wind speed in the poultry house. The normalization module is used for performing normalization processing on data collected by the sensors, and performing annotation and marking oneach type of data. The filtering module is used for performing filtering processing on the data. The noise reduction module is used for performing noise reduction processing on the data. According tothe on-line monitoring system of the poultry house environmental sensors and the monitoring method thereof, the deficiency of the prior art can be improved, and the processing accuracy of data of multiple types of environmental sensors is improved.

The invention discloses an odor gas and control system device. The odor gas and control system device comprises an odor gas detector, a controller, multiple kinds of on-site sensors for a public facility and multiple kinds of multilayer circuit processing units, wherein the on-site sensors are an ammonia gas sensor, a hydrogen sulfide sensor, a carbon dioxide sensor, a carbon dioxide sensor, an air voice sensor, a wind direction sensor, an ambient temperature sensor, a noise sensor, an ozone sensor, a toluene sensor, a formaldehyde sensor, a nitrogen dioxide sensor, a sulfur dioxide sensor, an illuminance sensor, a humidity sensor, a rain and snow sensor, a mobile data sensor and a sensor expanding unit; the multi-layer circuit processing units are an oxygenating unit, a humidifying unit, a deodorizing unit, a sterilizing unit, a gas filtering unit, a gas replacing unit, a fumigating unit, a space pressurizing and decompressing unit and a processing expanding unit. The odor gas and control system device can effectively control odor gas.

The invention discloses a hydrogen sulfide sensor based on a Cu7S4-CuO hierarchical structure micron flower sensitive material and a preparation method thereof, and belongs to the technical field of semiconductor oxide gas sensors. The sensor structure adopted by the invention consists of a commercially available Al2O3 insulating ceramic tube with two annular gold electrodes, a semiconductor sensitive material coated on the annular gold electrodes and the Al2O3 insulating ceramic tube, and a nichrome heating coil penetrating through the Al2O3 insulating ceramic tube. According to the invention, thioacetamide is utilized to synthesize the Cu7S4-CuO hierarchical structure microflower semiconductor sensitive material, so that a great leap of the gas sensitive characteristic is realized. The sensor shows excellent selectivity, high sensitivity (156-50ppm) and low detection lower limit (1.8-50ppb) on hydrogen sulfide, and has better long-term stability and fast response recovery time. The device disclosed by the invention is simple in process, small in size and suitable for mass production, and has a wide application prospect in the aspect of detecting hydrogen sulfide pollutants.

The invention belongs to the technical field of intelligent food packaging, and particularly relates to a preparation method of a gel colorimetric hydrogen sulfide sensor for indicating the freshnessof meat. The specific steps are as follows: adding sodium hydroxide to ultrapure water, carrying out stirring and dissolving to obtain sodium hydroxide solution, and adjusting the pH; adding gellan gum powder, and carrying out heating, stirring and dissolving to obtain gellan gum solution; adding silver nitrate to the gellan gum solution, carrying out heating and stirring to obtain gellan gum-silver nano solution, and adjusting the pH; and adding agar solution, and carrying out stirring evenly and cooling at room temperature to form solid gel, that is, a colorimetric hydrogen sulfide sensor. The sensor prepared in the invention has highly sensitive and selective response to hydrogen sulfide gas, and can react specifically with hydrogen sulfide gas produced by meat to produce visible colorchange, so as to indicate the freshness of meat. The sensor can be used in intelligent food packaging, and has the advantage of non-destructive, real-time and in-situ indication of food freshness.

The invention discloses a wireless gas measurement and control system with early warning function. The wireless gas measurement and control system includes a controller. The controller is connected with a data acquisition unit, a GPRS terminal and a wireless communication module at the same time, wherein the data acquisition unit comprises an FPGA main controller, an A / D converter, an eight-channel analog switch and a signal conditioning circuit; the A / D module converter and the eight-channel analog switch are connected with the FPGA main controller at the same time; the eight-channel analog switch is further connected with the signal conditioning circuit and the A / D converter. The signal conditioning circuit is connected with a hydrogen sulfide sensor and a sulfur dioxide sensor. The controller is further connected with an alarm module used for alarming when a collected data triggers an alarm threshold value. Based on the above principle, the wireless gas measurement and control system with early warning function, can collect a data triggering alarm threshold value for reminding the alarm, and transmit alarm information through the wireless transmission, accordingly the wiring difficulty is reduced, signal interference in the transmission process is also reduced, to help customers reduce the cost of the project.

The present invention relates to the use of internally-generated hydrogen sulfide as a calibration gas for hydrogen sulfide sensors. The present invention also relates to an apparatus and methods for self-calibration of hydrogen sulfide sensors.

The invention discloses a Michelson interference type hydrogen sulfide sensor based on a cladding-coated sensitive film. Each of two ends of endless-wavelength photonic crystal optical fiber is weldedwith a single-mode optical fiber end surface, and the welded tapering is performed at one end close to a light source, so that a collapse layer is comparatively long and the interference is enhanced;the other end is normally welded to form the collapse layer, and the other end of the single-mode optical fiber is connected with a Faraday polariscopy, thereby forming a sensor in a Michelson structure. The Cu / rGO sensitive film is coated at the photo crystal optical fiber cladding. The sensor provided by the invention has obvious selectivity on the hydrogen sulfide gas, in the range that the hydrogen sulfide concentration is 0-70ppm, the interference spectrum represents obvious red shift along with the continuous increasing of the detected gas concentration, the linearity is good, and the response recovery time is respectively 70s and 88s. The sensor disclosed by the invention is low in cost, high in sensitivity, strong in selectivity, simple in structure and suitable for the low-concentration hydrogen sulfide gas sensitivity detection.

A mine environmental monitoring device comprises a box body, wherein an air blower is arranged below the box body, a display screen is hinged above the box body, the display screen is supported by a support frame, an electric push rod is arranged at one side above the box body, a micro motor is arranged above the electric push rod, an output shaft of the micro motor is connected with a rotary bar,the rotary bar is connected with a camera, a PLC monitoring host electrically connected with the display screen is arranged at the inner side of the box body, and the PLC monitoring host is electrically connected with a hydrogen sulfide sensor, a methane sensor, a carbon monoxide sensor, a carbon dioxide sensor, a dust concentration sensor, an oxygen concentration sensor, a ventilation opening air velocity sensor and a temperature sensor. The mine environmental monitoring device provided by the invention is simple in structure, can comprehensively monitor a mine environment and also can improve the mine environment, so that the situation that time is not created for rescue when a danger happens is avoided.

The embodiment of the invention provides a device and a method for monitoring the freshness of frozen fresh meat. The device includes an interdigital electrode hydrogen sulfide sensor, a paper batteryand an electrochromic apparatus. The interdigital electrode hydrogen sulfide sensor is connected to a fresh meat package, and the two ends of the paper battery are connected with the interdigital electrode hydrogen sulfide sensor and the electrochromic device respectively, so as to form an equivalent circuit. The interdigital electrode hydrogen sulfide sensor is connected to a fresh meat package,the equivalent circuit is judged to be switched on if the electrochromic apparatus changes color, and the impedance value of the interdigital electrode hydrogen sulfide sensor is a first preset threshold. The freshness of frozen fresh meat can be obtained according to the impedance value of the interdigital electrode hydrogen sulfide sensor and a pre-established model between the freshness of frozen fresh meat and the impedance value of the interdigital electrode hydrogen sulfide sensor. The internal quality of chilled fresh poultry can be monitored quickly and in real time. Compared with theexisting non-destructive testing technology, the method for monitoring the freshness of frozen fresh meat provided by the embodiment of the invention reduces the detection cost and makes monitoring more convenient.