99results about How to "Realize remote detection" patented technology

The invention supplies a method and system used to test electrolyte type storage battery performance. The method includes the following steps: connecting the storage battery to the test load with different resistance values at different time quantum; controlling the test load unit and the connection state; utilizing the discharge characteristic to gain internal resistance detecting value; correcting the detecting value and comparing it with given initial state to gain current residual capacity state value according to the relation curve between the different residual capacity state values and internal resistance; then testing the storage battery performance. Thus the invention can be used to improve the test precision, realize remote testing, and further satisfy the routine maintenance demand for valve controlled sealed type lead-acid battery.

The invention relates to a sensing unit in a sensor system used for detecting the air concentration in the environment. The sensing unit comprises: an optical head which comprises a cylindrical hollow part with openings on the two ends and a collimator arranged in the cylindrical hollow part, wherein, one end of the cylindrical hollow part is connected with optical fiber; a column cylinder, one end of which is coupled with the other end of the optical head; a plurality of stomas which are formed on the lateral wall of the column cylinder; at least one reflecting device which is arranged in the column cylinder and is used for reflecting beams to lead to the result that the beams emit and enter the fiber again through the collimator. The beams transmitted by the fiber are coupled in the column cylinder through the collimator to cause that the beams are parallel with the axial direction of the column cylinder. The sensing unit also comprises the sensor system used for detecting the air concentration in the environment and a method using the sensor system for detecting the air concentration in the environment.

The invention relates to a fibre optic gas detector for the fire hazard of a coal gab area, comprising a light source, a probe, a photodetector and a signal processing unit, wherein light emitted by the light source is led into the photodetector by the probe so as to be converted into electrical signals, and the electrical signals are led into the signal processing unit to be processed. The fibre optic gas detector is characterized in that an optical circulator is arranged on a light path between the light source and the probe, the light source is connected with the first port of the optical circulator, the probe is connected with the second port of the optical circulator, the third port of the optical circulator is connected with a photoelectric converter, the probe is of a multi-time reflection type white cell structure, and a terminal optical fiber collimator and a fibre reflecting mirror are arranged on the exit end of the white cell.

The invention discloses a liquid level detection device, which comprises at least one magnetic sensor with zero power consumption; a track vertically arranged in the liquid to be measured in a position opposite to the magnetic sensor; a floating ball on the liquid surface; a positioning sheet fixed on the floating ball; and a magnet fixed at one end of the positioning sheet, wherein the other end of the magnet is arranged in the track. The magnetic sensor made of magnetically bistable alloy filaments can induce the position of the floating magnet to convert liquid level into an electric signal, which is transmitted remotely through a cable wire, and the sensor detects the level height according to the induction of magnets at corresponding height without using a power supply and mechanical contacts, thus obviating the generation of electrical sparkles, saving power and achieving safe operation, no mechanical contacts and high reliability. The detection result can be transmitted remotely beyond 1,000 meters to achieve remote detection. The liquid level detection device has the advantages of simple structure, practical use, and wide application range, and is used for remote level detection of inflammable liquid and for remote level detection of liquids of other fields such as chemical engineering, mine and civil fields.

The invention relates to an online comprehensive error calibration method for intelligent electric energy meters. The method comprises steps: (1) the intelligent electric energy meter cluster is arranged to form a tree topology structure; (2) a flow conservation algorithm model is acquired; (3) the flow data of the intelligent electric energy meter cluster during operation are recorded for multiple times, and the operation conditions of the intelligent electric energy meter cluster are recorded at the same time; (4) the flow data is subjected to equivalent conversion; (5) errors during the current period are calculated; (6) the calculation result in the former step is corrected and uncertainty evaluation is carried out; and (7) comprehensive errors are calculated and acquired. The method of the invention aims in that in a non laboratory condition, after the scope of the influence amount beyond the laboratory condition, the environment condition and the test wiring condition are quantized preliminarily, the online operating meter data in different conditions are used as available values for calculation, correct calibration in the non laboratory condition is realized, a full data sample thinking mode is applied, mass computer data of a power user power consumption information acquisition system are mined, the use of an external standard instrument is not needed, the cost is reduced, and the efficiency is improved.

The invention discloses a comprehensive detecting device for detecting internal defects of a drainage pipeline. The comprehensive detecting device comprises an equipment carrier capable of floating on water, wherein a camera capable of detecting the part above the pipeline water is arranged on a water part of the equipment carrier, and a camera illuminating lamp is arranged; a sonar sensor capable of detecting the pipeline underwater part is arranged on an underwater part of the equipment carrier; and controlling and receiving signals of the camera and the controlling and receiving signals of the sonar sensor are respectively connected with a controller by virtue of a cable. The comprehensive detecting device disclosed by the invention has the characteristics of complete functions, wide detecting range, safe and reliable work, and the like, and can be used for comprehensively detecting the internal conditions of the drainage pipeline.

The invention relates to a method for measuring the parameter of an omega welding seam defect, in particular to a method for measuring the parameter of an omega welding seam defect, which is applied to a control rod drive mechanism of a nuclear power plant. The method adopts a welding technique estimation test piece of the omega welding seam to manufacture a contrast test block, adopts an automatic detection device containing an ultrasonic detection method and a vortex detection method to measure the parameter of the defect and judges the parameter of the defect integrally. The method can effectively measure the parameter of the omega welding seam defect of the control rod drive mechanism of the nuclear power plant accurately, provides data support for the preventive maintenance of the control rod drive mechanism, provides guarantee for the nuclear safety and is suitable for detecting the parameter of the welding seam defect in nuclear industry system.

The invention discloses a sensing / detecting device capable of reflecting an internal force change and internal displacement of rock-soil. The sensing / detecting device comprises a sensor, sensing rods and pulling ropes, wherein two ends of the sensor are respectively connected with one end of each pulling rope; the other ends of the pulling ropes are connected with the sensing rods; and two sensing rods are fixed into the rock-soil; the sensor is composed of a sliding rod assembly, an outer sleeve and an inner resistance wire ring; the sliding rod assembly and the inner resistance wire ring are installed inside a sleeve; one end of a sliding rod is connected with a sliding rod connecting bolt; the other end of the sliding rod is fixed on a spring support ring on the rear end of the sliding rod; a stressed spring is sleeved on the sliding rod; a sliding brush is installed on the spring support ring on the rear end of the sliding rod and is contacted and communicated with resistance wires; stress changes of the sensing rods are transmitted to the sensor, then a displacement change is generated at a position where the sliding brush is contacted with the resistance wires, output leads of the resistance wires and a output lead of the sliding brush are changed in length, resistance is changed, therefore, a change of the the rock-soil is obtained by measuring the resistance between the output leads of the resistor wires and the output lead of the sliding brush. The sensing / detecting device is simple in structure, low in cost, high in reliability and convenient and practical.

The invention relates to an operation error remote calibrating method of an intelligent ammeter. The method comprises the following steps: (1) installing an intelligent ammeter cluster to form a tree-shaped topological structure; (2) to obtain a flow conservation foundation model of the intelligent ammeter cluster; (3) importing a virtual branch circuit to dynamically correct an intelligent ammeter cluster topological model, to obtain a flow conservation algorithm model; (4) to obtain electric current incremental data of the intelligent ammeter cluster repeatedly, and calculating a relative error; (5) correcting a calculation result and uncertainty evaluation; and (6) to obtain an error calculation result. The method is capable of, in allusion to 0.48 billion of the on-line operated intelligent ammeters in state grid corporations, applying a full data sample thinking mode, mining mass electric energy data of a power consumer electricity information collection system without the help ofan external standard instrument, carrying out the remote verification technical research of the intelligent ammeters, enabling both power supplier and consumer to master the accuracy of an electric energy metering device in real time, satisfying the expected requirement of clients, and improving the corporate image.

The invention relates to a THz radiation reinforcing method through a light line array, which comprises the following steps: calibrated femtosecond laser are focused by a focusing lens to generate light line; a BBO crystal is mounted behind the focusing lens to generate a two-color field; a step-type phase plate is mounted in front of the focusing lens to generate controllable light line array to reinforce the THz radiation. Compared with the conventional THz radiation reinforcing method, the method provided by the invention has the advantage that a simple, compact, and feasible structure is provided; the generated THz is impulse light wave, has higher average power and signal-to-noise ratio compared with THz generated without the phase plate, and can be applied to THz remote detection; the THz radiation reinforcing method can reinforce THz radiation power, increases the signal-to-noise ratio, and can be applied to THz spectral analysis.

The invention belongs to the technical field of water quality detection, and particularly relates to an online water quality detection method based on an unmanned aerial vehicle, which comprises the following steps: step 1, debugging equipment, a sampling module and a detection module are installed on the unmanned aerial vehicle, and normal communication between the unmanned aerial vehicle and a remote terminal is ensured; step 2, sampling: the unmanned aerial vehicle releases the sampling module, and the sampling module enters the water body of the target water area to collect samples of thewater body; step 3, detection: the sampling module releases the water body sample to the detection module, and the detection module detects the water body sample; and step 4, the steps 2 and 3 are repeated to complete water quality detection of all target water areas. According to the unmanned aerial vehicle water quality detection method provided by the invention, fixed-point rapid sampling of alarge-area water area can be realized; meanwhile, an airborne detection module is carried, so that remote detection of water quality parameters and remote transmission of data are realized, the waterquality detection efficiency of a large-area water area is improved, a water area water quality distribution diagram can be established, and more intuitive and accurate detection data is provided.

The invention belongs to the range of heavy metal ion detection equipment and particularly relates to an optical fiber sensing system for simultaneously and rapidly detecting multiple types of heavy metal ions.The detection system is composed of a light source module (1), a transmission module (2), a sample loading and detecting module (3) and a photoelectric detection module (4) which are sequentially connected; a wavelength-division multiplexing technology in optical fiber communication and novel fluorescent dye quantum dots are adopted for the system, and two light paths are not needed to be separated through an optical loop device.By means of the optical fiber sensing system for simultaneously and rapidly detecting multiple types of heavy metal ions, simultaneous and rapid detection of multiple types of heavy metal ions can be achieved, miniaturization and portability of an instrument are achieved at the same time, and remote detection, real-time analysis, filed detection and dynamic monitoring are achieved; instrument cost is lowered; by means of the system, multiple types of heavy metal ions in a solution can be detected simultaneously and rapidly, and the optical fiber sensing system is widely applied to the fields of environmental detection, industrial sewage treatment, soil heavy metal pollution, food hygiene inspection, medical application and the like.

The invention relates to an error control method for online operating smart electric energy meters based on full sample data thinking. The method comprises the following steps: (1) installing a smartelectric energy meter cluster to form a tree topological structure; (2) introducing a virtual branch to correct a smart electric energy meter cluster topological model; (3) eliciting a flow conservation algorithm model; (4) acquiring the sample data of all smart electric energy meters; (5) substituting all the sample data into the flow conservation algorithm model to calculate the errors of all the smart electric energy meters; and (6) realizing precise control according to the error results of all the smart electric energy meters. The method applies the full sample data thinking to the 480 millions online operating smart electric energy meters of the state grid corporation, excavates massive electric energy data of a power user electric information acquiring system, measures the error data of all electric energy meters, uses whole data instead of a random sample, requires no external standard equipment, carries out smart electric energy meter remote calibration technology research, and enable power supplier and consumers to be able to understand the accuracy of energy metering devices in real time.

The invention discloses a remote automatic controlled switching device which comprises a signal transceiver and a controller. The signal transceiver emits signals to cover a certain space around the switching device and receives the signals that are fed back by signals emitted by the signal transceiver and exist in a to-be-detected object existing in the space, or the signals emitted by the to-be-detected itself. The controller can read information carried by the signals received by the signal transceiver and control the on-off operation of the switching device according to a judging process preset in the controller and based on the information. The remote automatic controlled switching device of the invention can enhance the convenience of the user and the security of the switching device.

The invention relates to the technical field of material conveying, and particularly provides a cable pipe belt conveying structure and a conveyor. The conveying structure comprises a cable mechanismwhich is arranged on a supporting object and is used for providing a conveying path for material conveying and a pipe belt conveying mechanism which is installed on the cable mechanism and is used forconveying materials. According to the cable pipe belt conveying structure and the conveyor, the cable structure is combined with a pipe belt machine, so that the problem of limited large-scale long-distance conveying of bulk materials in mountain areas is effectively solved; and meanwhile, a detection mechanism is adopted to replace a maintenance walkway, so that the efficiency is improved, the labor intensity is reduced, the investment cost is saved, the construction difficulty is reduced, the construction period is reduced, the comprehensive investment of projects is reduced, the social resources are saved, and practicability is achieved.

The invention provides a method for detecting the roadbed strain by an optical fiber sensing technology. The method comprises the following steps: collecting virtual strain parameters of multiple monitoring points in a structural layer by utilizing a strain optical fiber sensor in multiple structural layers of roadbed, and collecting temperature parameters of multiple monitoring points by utilizing a temperature optical fiber sensor laid in the structural layer; acquiring virtual strain parameters from multiple monitoring points of a strain optical sensor, and acquiring temperature parametersfrom multiple monitoring points of a temperature optical sensor; calculating the differential value of corresponding virtual strain parameters by utilizing the temperature parameters to obtain accurate strain parameters of the multiple monitoring points; and determining the strain situation of the roadbed according to the accurate strain parameters of multiple monitoring points. According to the method, the detection steps can be simplified, deformation characteristics of the roadbed in the constructing period and operation period can be completely mastered, automatic monitoring and data collection of unattended operation can be realized, and far-distance detection can be realized.

The invention discloses a dynamic-sounding automatic test instrument. The dynamic-sounding automatic test instrument comprises a hammer base. A drill stem is detachably mounted at the bottom of the hammer base. A probe is mounted at the bottom of the drill stem. A guide rod is mounted at the top of the hammer base. A center penetration hammer is movably mounted on the guide rod. A data processingmodule, a laser ranging module and an acceleration module are arranged at the bottom of the hammer base, and the laser ranging module and the acceleration module are connected with the data processingmodule. The laser ranging module is used for measuring distance data between the bottom of the hammer base and the ground and sending the distance data to the data processing module. The center-penetration hammer hammers the hammer base repeatedly, the distance data are measured every time hammering is completed, and the data processing module works out the sounding depth according to the multiple pieces of distance data. The acceleration module is used for measuring the acceleration speed and speed of downward movement of the drill stem after every time of hammering and sending measured datato the data processing module. The data processing module determines whether every time of hammering is effective according to the acceleration speed and speed data. The dynamic-sounding automatic test instrument can achieve automatic measurement, judgment, recording and data processing and is high in efficiency and precision.

The invention belongs to the technical field of water quality detection, and particularly relates to a water quality detection system based on an unmanned aerial vehicle. The system comprises the unmanned aerial vehicle, a sampling module and a detection module, and the detection module and the sampling module are both carried on the unmanned aerial vehicle; and the unmanned aerial vehicle is alsoprovided with a retracting and releasing device for releasing the sampling module into a to-be-detected water body and recovering the sampling module from the to-be-detected water body to the unmanned aerial vehicle, the sampling module is used for collecting a to-be-detected water body sample, the detection module is used for detecting the sampled water body sample, the unmanned aerial vehicle is provided with a wireless communication module, and detection data of the detection module are sent to a remote terminal through the wireless communication module. The unmanned aerial vehicle water quality detection system provided by the invention can realize fixed-point rapid sampling of a large-area water area; and meanwhile, the airborne detection module is carried, so that remote detection of water quality parameters and remote transmission of data are realized, the water quality detection efficiency of the large-area water area is improved, a water area water quality distribution diagram can be established, and more intuitive and accurate detection data are provided.

The invention relates to the technical field of analysis and detection, and discloses a wireless photoelectrochemical indirect analysis and detection device and a manufacturing method thereof. According to the device, a first control electrode is located in a first electrolyte in a first electrolytic tank; a second control electrode is located in a second electrolyte in a second electrolytic tank;a closed bipolar electrode is composed of a conductor, a detection electrode and a photoelectrode loaded with a photoelectric semiconductor material; the detection electrode and the photoelectrode are positioned in the first electrolytic tank and the second electrolytic tank respectively; the first electrolytic tank is connected with the second electrolytic tank through the conductor; a light source is fixed above the photoelectrode; a to-be-detected substance is contained in the first electrolyte; a stabilizer is contained in the second electrolyte; an electrochemical workstation is connected with the first control electrode and the second control electrode through wires; and potential control is carried out on the detection electrode and the photoelectrode. A bipolar electrode technology is utilized for the first time, and the remote detection of a target object is realized on the basis of the principles of charge conservation and limited current.

The invention relates to a remote calibration method for an operation error of a generalized flow instrument, and the method comprises the steps: (1), installing a generalized flow instrument clusterto form a tree-shaped topological structure; (2), obtaining a flow conservation algorithm model of the generalized flow instrument cluster based on the tree-shaped topological structure formed by thegeneralized flow instrument cluster; (3), correcting a line loss error, introducing a virtual branch to correct the topological model of the generalized flow instrument cluster, and correcting the flow conservation algorithm model; (4), calculating a relative error; (5), correcting a calculation result and estimating the degree of uncertainty; (6), obtaining an error calculation result. The methodemploys a full data sample thinking mode for 0.48 billion online operating intelligent electric energy meters of the State Grid Corporation, achieves the mining of mass electric energy data of a power utilization information collection system for power users, does not need an external standard instrument, achieves the performing of the remote calibration technology of the intelligent electric energy meters, enables the power supply side and a power utilization side to know the accuracy of an electric energy metering device in real time, meets the expected demands of customers, and improves the enterprise image.

The embodiment of the invention provides a method and a system for remotely detecting an intelligent card, and solves a technical problem that a client sends a request locally by adopting a B / S mode at present, a detection operation is carried out on a local intelligent card of the client, then a detection result is transmitted to a server to analyze, only the local intelligent card can be detected, and an intelligent card at a different place cannot be detected remotely. The method for remotely detecting the intelligent card comprises the steps that an execution client acquires a detection instruction sent by a remote client through a server; the execution client calls execution middleware according to the detection instruction, and calls a card reader dynamic link library through the execution middleware; the detection instruction is sent to the intelligent card through a card reader by being combined with the card reader dynamic link library; and a detection result returned back by the intelligent card after the detection instruction is executed is acquired and sent to the remote client.

The present invention discloses a remotely-detectable emergency lighting and evacuation indication system. The system includes an intelligent control unit, a data transmission unit, a centralized control display unit and a mobile phone client type; the intelligent control unit is connected with a fire alarm and a system terminal device; the intelligent control unit carries out data interaction with the system terminal device; the data transmission unit is used for the intelligent control unit to transmit data; and the central control display unit and the mobile phone client are used for displaying the data of the intelligent control unit. The remotely-detectable emergency lighting and evacuation indication system is a centralized control type intelligent fire emergency lighting and evacuation system, can communicate with a fire automatic alarm system, and receives the alarm position information of the fire alarm system; the host of the evacuation indication system automatically generates an optimal evacuation line according to an alarm point, so that people can be guided to evacuate rapidly along a safe passage through a safe exit; and the remote detection of the intelligent evacuation indication system can be realized effectively, so that unified management and resource integration can be realized, and management efficiency can be improved.

The invention provides a line fault detection device mounted on an aircraft. The detection device comprises a detection module and a signal module with a signal generator. The signal generator inputsdetection signals into a detection point of a power line with a power failure fault successively or simultaneously; the detection module detects electric features of the two sides of the detection point to determine that a fault range is at a certain side of the detection point. When the detection device is in use, an unmanned aerial vehicle is remotely controlled to mount the circuit fault detection device on a power line so as to carry out fault detection. The circuit fault detection device is especially suitable for a road with block up or a line high above the ground; and remote detectionof the power line fault is realized.

The invention discloses an underwater structure surface defect detection robot system. The underwater structure surface defect detection robot system comprises an underwater robot detection unit, a cable device unit and a positioning array unit; the underwater robot detection unit comprises a frame; a binocular camera is fixed at the front part of the frame; a six-degree-of-freedom propeller is fixed at the rear part of the frame; a positioning module and a control module are fixed at the upper part of the frame; a battery compartment is fixed at the middle part of the frame; the cable deviceunit is connected with the control module through a cable; a wire net card module is arranged in the cable device unit; multiple hydrophones are arranged at the lower part of the positioning array unit; a bin body is arranged in the positioning array unit; and a signal processing module and an optical fiber module are arranged on the bin body. The invention further discloses a corresponding working method. According to the underwater structure surface defect detection robot system and the working method thereof, underwater structure surface defect images can be remotely collected and analyzedin real time; and meanwhile, defects can also be measured and analyzed to improve the intelligence level of underwater structure surface defect detection.

The invention relates to a smart gas meter online comprehensive error calibration method. The smart gas meter online comprehensive error calibration method includes: (1) arranging a smart gas meter cluster to form a tree topological structure, and acquiring a flow conservation basic model of the smart gas meter cluster; (2) acquiring a flow conservation algorithm model; (3) frequently recording flow data of the smart gas meter cluster in operation, and recording an operation condition of the smart gas meter cluster; (4) performing equivalent conversion on the flow data; (5) calculating a current intermediate error; (6) performing uncertainty evaluation; and (7) calculating and acquiring a comprehensive error. The objective of the invention is that in actual operation, in the operation condition beyond the influence quantity of a laboratory condition, initial quantization is performed, and then data of measurement meters in online operation in different conditions is used as a usable value to perform calculation, and accurate calibration in a non- experiment condition can be achieved; a whole data sample thinking manner is used to mine mass computer data of a user electricity consumption information acquisition system without using external standard instruments; and the cost is reduced, and the efficiency is improved.

The invention relates to a remote running error correction method for intelligent gas meters. The method comprises the steps that 1, clustering installation is conducted on the intelligent gas metersto form a tree topological structure; 2, a flow conservation basic model of a intelligent gas meter cluster is obtained; 3, pipeline loss error correction is conducted, and a virtual branch is introduced to dynamically correct a intelligent gas meter cluster topological model, so that a flow conservation algorithm model is obtained; 4, multiple pieces of gas flow increment data of the intelligentgas meter cluster is obtained, and a relative error is calculated; 5, uncertainty evaluation is conducted on a calculation result; 6, an error calculation result is obtained. By means of the method, the costs of marketing and operating can be effectively reduced, and loss of resources such as workers, vehicles and equipment in a check process can be greatly reduced; moreover, through achievement of remote checking, precise replacement of broken-down intelligent gas meters can be achieved, and the number of trouble-free intelligent gas meters which are dismounted can be lowered, which is greenand environmentally-friendly; a purpose fund is saved, so that the operational and maintenance costs of an enterprise are greatly reduced, quality and efficiency improvement is achieved, and significant economical benefits and social benefits are provided.

The invention discloses a high-accuracy handhold digital oscilloscope which comprises a data collecting circuit, a low-pass filtering circuit, an A / D converter, a data transmission module, a spectral analysis and parameter adjustment circuit, a waveform display circuit and a microprocessor. A signal output end of the data collecting circuit is connected with a signal input end of the low-pass filtering circuit. A signal output end of the low-pass filtering circuit is connected with a signal input end of the A / D converter. A signal output end of the A / D converter is connected with a signal input end of the data transmission module. Signal output ends of the data transmission module are connected with a signal input end of the spectral analysis and parameter adjustment circuit and a signal input end of the waveform display circuit. A signal output end of the spectral analysis and parameter adjustment circuit and a signal output end of the waveform display circuit are connected with a signal input end of the microprocessor. According to the technical scheme, the high-accuracy handhold digital oscilloscope overcomes the shortcoming that a traditional oscilloscope cannot store and analyze detecting results, and the measuring accuracy of a whole system is improved.

The invention discloses a novel mobile type hot-water boiler efficiency testing platform and a method. The novel mobile type hot-water boiler efficiency testing platform comprises a truck body; the truck body is provided with an integrated control room, a heat exchange room and a cooling room; a PLC control system and a display are arranged in the integrated control room; a cooling water tank is arranged in the cooling room; a first heat exchanger and a second heat exchanger are arranged in the heat exchange room; the cooling water tank, the first heat exchanger and the second heat exchanger are sequentially connected with one another through a cooling water pipe; a boiler hot water pipeline is arranged in the heat exchange room; the boiler hot water pipeline is connected with the first heat exchanger and the second heat exchanger sequentially; the boiler hot water inlet end of the first heat exchanger is provided with a first flow rate monitor and a first temperature sensor; and the boiler hot water outlet end of the second heat exchanger is provided with a second flow rate monitor and a second temperature sensor. The device is simple in structure. With the positive balance boiler efficiency detection method adopted, boiler efficiency can be quickly calculated.

The present invention relates to a low-voltage integrated distribution box, belonging to the technical field of electric equipment. The low-voltage integrated distribution box includes a box shell. The interior of the box shell is separated into four working rooms, including a measuring room, a capacitance compensation room, a cable entry room and a cable exit room. The measuring room is internally provided with a residual current operated circuit breaker. The capacitance compensation room is internally provided with a fuse. Both the left side surface and the right side surface of the shell are provided with an inner panel and an outer panel. The inner panel is provided with a first air vent, and the outer panel is provided with a second air vent, thereby promoting air circulation between interior and exterior of the box, and lowering interior temperature of the box. The box is more convenient to install and move, less rainwater enters the box, and the protection level of the box is improved.