630 results about "Intrinsic safety" patented technology

The invention discloses a side-mounted vacuum circuit breaker ring main unit, which relates to the technical field of ring main units, and comprises a multi-source sensing module used for collecting and converting state parameters from equipment in the ring main unit and the environment of the ring main unit; the state fusion processing module is used for configuring rules according to a set sampling period and a threshold value; the intelligent auxiliary identification module is used for establishing a mapping relation between the multi-dimensional state parameters and the potential risk factors; the digital twin modeling module is used for constructing a virtual simulation model consistent with the ring main unit; the authority control and interlocking judgment module is used for fusing the state vector, the risk index value and the operator instruction parameter according to a preset authority strategy rule; the closed-loop control module comprises a control logic unit and a simulation verification unit and is configured to respond to the state event trigger signal, call a control instruction generation mechanism and call a virtual model to perform forward deduction on a control effect; according to the invention, the stability of equipment operation and the intrinsic safety level of operation are greatly improved.

The present invention relates to the field of power distribution technology, and in particular to an explosion-proof and intrinsically safe permanent magnet high-voltage vacuum distribution device for mine use, which includes a chassis and an explosion-proof box body. The explosion-proof box body is fixedly connected to the top of the chassis. A dust removal box is fixedly connected inside the chassis. A condensation box is provided at the top of the dust removal box. At least one ventilation channel is connected between the dust removal box and the condensation box. A filter screen arranged in a meandering path is provided inside the dust removal box. The filter screen slidably penetrates through the ventilation channel. The filter screen is used to filter dust and debris in the air passing through the ventilation channel. A driving component for driving the filter screen to move along the meandering path and a cleaning component for cleaning the filter screen are also provided inside the dust removal box. The driving component drives the filter screen to continuously move, and a rotary brush is used to clean the moving filter screen, so as to keep the filter screen clean and unobstructed, thereby ensuring smooth air circulation and heat dissipation effect.

The invention provides a coal mine underground MR safety training system, which comprises an intrinsically safe MR head display device, a multi-mode communication center module, a roadway environment sensing unit, a virtual-real fusion training engine and an intelligent evaluation system, and is characterized in that the intrinsically safe MR head display device comprises an annular distributed antenna array and a wide bandgap semiconductor circuit; the antenna is embedded in an anti-collision beam of the mining helmet, and intrinsic safety is achieved through dynamic power control; the multi-mode communication central module forms a dual-channel redundant architecture by an industrial Ethernet interface and a mining wireless unit, is internally provided with a dynamic routing chip, and automatically switches communication modes according to methane concentration and dust detection values to ensure low-delay and high-reliability transmission; the roadway environment sensing unit integrates a geological radar and a micro-seismic monitoring device, constructs a three-dimensional dynamic geological model in real time, and continuously updates roof displacement data.

The invention discloses a hanging basket motion control method and system based on operation state recognition, particularly relates to the technical field of bridge construction automation, and is used for solving the problem of poor synchronous control of hanging basket movement. According to the method, working conditions are accurately recognized through multi-source sensing data fusion and a finite-state machine, servo system parameter self-adaptive setting is achieved based on working condition parameter mapping, and an anti-interference movement track is generated by adopting a model prediction control algorithm fusing pose feedback and wind load feedforward; walking synchronization and platform stability are achieved through cross coupling control and posture closed-loop fine adjustment, emergency response is provided through the independent safety guarding thread, control and protection double closed loops are formed, and therefore the motion precision, the anti-interference capacity and the intrinsic safety level of the hanging basket under the variable-load and strong-disturbance working conditions are effectively improved, and the safety of the hanging basket is improved. And the energy consumption and the mechanical vibration frequency in the moving process of the hanging basket are reduced.

The invention discloses a scraper conveyor chain breakage fault monitoring system and a chain breakage interval positioning method, and belongs to the technical field of coal mine fully mechanized coal mining equipment. The system comprises a command programming system, a scraper distance sensor, a machine head distance sensor, a local signal base station box and a data processing system; the scraper distance sensors are numbered in two types, are mounted in end grooves of scrapers, and only interact with adjacent sensors of the same type; when the upstream sensor and the downstream sensor at the fault point detect that the distance is abnormally increased during chain breakage, data are transmitted to the data processing system in real time through the signal base station box, and shutdown locking is triggered; after shutdown, the machine head distance sensor is automatically started, the number of the scraper distance sensor closest to the broken chain side is recognized, and the category of a broken chain, the position of a chain groove and the interval of a support are accurately judged through calculation by combining preset parameters. According to the method, fault sudden stop intrinsic safety can be achieved, a secondary chain shooting accident is avoided, the chain breakage area is rapidly positioned, time consumed by manual troubleshooting is remarkably shortened, and production efficiency is comprehensively improved.

The invention discloses a thermal power plant limited space operation safety and environment multi-parameter monitoring system, and relates to the technical field of operation safety monitoring. A structure parameter model is constructed based on a space volume structure, a gas exchange path, a risk type and an operation position, and multi-parameter sensing nodes are configured; extracting abnormal fluctuation characteristics of the environmental parameters through edge computing nodes; a gas flow model and a heat distribution model are combined to carry out space-time inversion, a risk source is positioned, a space risk heat map is dynamically generated, the position and action state of an operator can be obtained in real time, the exposure probability is calculated, and automatic identification and graded early warning of a high-risk area are realized; the system has high-precision, low-delay and full-coverage monitoring capability, and the intrinsic safety of limited space operation of the thermal power plant is improved.

The utility model discloses an intrinsic safety power supply circuit and a fuel electrochemical oxygen analyzer. The intrinsic safety power supply circuit comprises a first MOS tube, a first capacitor, a second capacitor, a first resistor, a first Schottky diode, a first Zener diode and a second Zener diode, the power supply module of the fuel electrochemical oxygen analyzer comprises the intrinsic safety power supply circuit and further comprises a sensor module, an AD conversion module, a key module, a single chip microcomputer module, an analog output module and a display driving module which are connected with the power supply module, and the single chip microcomputer module is connected with the AD conversion module, the key module, the analog output module and the display driving module. The sensor module is connected with the AD conversion module, and the analog output module is connected with external equipment; the fuel electrochemical oxygen analyzer adopts the intrinsically safe power supply circuit to limit the working current and voltage in the circuit so as to control the power consumption of the whole machine, so that explosion prevention is realized, and the fuel electrochemical oxygen analyzer can measure the oxygen concentration in a flammable and explosive environment.

The invention discloses an amino mixed fuel explosion characteristic visualization and explosion suppression coordinated regulation and control system and method, and the system comprises an explosion suppression device which is disposed in a combustion chamber and is in communication connection with a holographic monitoring device and an explosion overpressure real-time prediction model. A graded explosion suppression scheme is set according to the safety early warning grade, so that active intervention of explosion suppression intensity and mode matched with combustion or explosion development stages with different intensities in the combustion cavity is implemented. Therefore, visualization of the mixed gas combustion and explosion dynamic process under the multi-parameter coupling condition can be achieved, and the comprehensiveness and reliability of combustion and explosion research are remarkably improved; through real-time monitoring and intelligent prediction of the explosion process, the explosion process in the device can be rapidly started, the explosion suppression response can be optimized, the explosion development can be suppressed, the integrity and operation safety of an experiment system can be guaranteed, and the intrinsic safety and the system protection capability of the experiment process can be effectively enhanced.

The invention relates to the technical field of plasma ignition, in particular to a split type plasma ignition device and ignition system for passivating gunpowder, which comprises an ignition tube assembly and an oscillation control assembly, the ignition tube assembly comprises an ignition tube, gunpowder and a hollow resonance coil; the oscillation control assembly comprises a coil support, an excitation coil and an oscillator circuit module. The excitation coil on the coil support is used for being matched with an insulation tube in an ignition tube in an inserted mode. An ignition pulse excites an oscillator circuit module to generate a high-frequency excitation signal, the high-frequency excitation signal is released by an excitation coil and coupled to a hollow resonance coil in an electromagnetic induction mode to form LC resonance, the LC resonance enables a discharge part to generate a high-intensity electric field, the high-intensity electric field excites plasmas on the surface of gunpowder to ignite the gunpowder, and ignition is completed. The device breaks through multiple limitations of a traditional ignition mode, and intrinsic safety and high reliability of passivation agent ignition are achieved.

The invention discloses a deep mine rockburst risk dynamic assessment and active prevention and control system, and relates to the technical field of rockburst risk assessment and prevention and control. Comprising a data acquisition module, a preprocessing module, a dynamic evaluation module, an active prevention and control decision module, a prevention and control execution module, a system monitoring and feedback module and a data storage and authority management module, is interacted through a mining intrinsic safety type communication network, adapts to underground working conditions and supports 24-hour operation; the data acquisition module deploys multiple types of monitoring equipment, and dynamically adjusts frequency encryption transmission; the preprocessing module filters noise and interpolates to ensure data integrity; the dynamic evaluation module updates the risk level in combination with indexes and algorithms; the decision-making module matches the prevention and control scheme and needs to be audited; the execution module is in butt joint with equipment control parameters; the monitoring module measures the state calculation effect; and the storage and authority module performs dual-backup, and performs hierarchical authorization trace leaving. According to the method, the problems of lag and low efficiency of traditional rockburst prevention and control are solved, evaluation accuracy and prevention and control efficiency are improved, risk closed-loop management is realized, safety and cost are balanced, and mining safety is guaranteed.

The utility model provides a near-bit measurement-while-drilling nipple based on an eccentric water hole. The near-bit measurement-while-drilling nipple structurally comprises an outer pipe, an electronic bin framework, a wireless transmitting nipple, a battery assembly, a gamma measurement module, an inclination angle measurement module and a measurement circuit board. The electronic bin framework is fixed in the outer pipe, the battery assembly, the gamma module and the inclination angle module are annularly arranged, near-bit track and geological parameter measurement is achieved, and occupied space is reduced. One end of the wireless transmitting short section is connected with the outer pipe through straight threads, and the other end is connected to the screw motor through taper threads. The wireless transmitting short section transmits measurement data through wireless signals, and transmission of the measurement data across the screw motor is achieved. The intrinsic safety type circuit design ensures that the explosion-proof requirement of a coal mine is met. The device is compact in structure, meets the requirement of small-diameter drilling of a coal mine, and realizes high-precision and real-time measurement and stable data transmission.

The invention relates to the technical field of shaft lifting system control, and discloses a shaft lifting system and method based on intelligent control. According to the system, an acquisition module collects an operation table signal and an acousto-optic annunciator state to obtain an operation instruction and equipment state data; the marking module adds a timestamp and constructs an intrinsic safety type distributed control topological structure; the input module sends the state data to the sensor network to identify the lifting state; the implementation module establishes a dependency graph to realize a horizontal forwarding locking function; the matching module performs feature extraction and fault identification; and the association module analyzes and processes the strategy and the process record, and outputs a parameter optimization value and a locking logic adjustment scheme. According to the application, the distributed control network is constructed, state analysis is realized in combination with the node link sensor network, and continuous improvement of system performance is realized through data-driven fault diagnosis and parameter optimization, so that the safety, reliability and operation efficiency of the mine hoisting system are remarkably improved.

The invention provides a safe and stable section operation regulation and control method for a wind-thermal bundled delivery system and a related device, and provides a piecewise linear section pre-control method by analyzing system stability conditions in different operation modes according to off-line simulation calculation of massive operation modes. And when the current thermal power of the wind-thermal bundled sending-out system is smaller than or equal to the thermal power critical value, the constraint on the wind power is released, so that the output of the wind turbine generator is not constrained by the section pre-control requirement. And when the current thermal power is greater than the thermal power critical value, pre-controlling the wind-thermal bundled delivery system so as to adjust the operation power of each unit in the wind-thermal bundled delivery system to be in the safe and stable operation control domain to ensure that the N-1 transient state delivered by the system is stable. Therefore, the intrinsic safety of the system net rack under the background of large-scale new energy production can be ensured, and meanwhile, the problem that the regional sending-out capability is limited due to an excessively harsh N-1 section pre-control strategy is avoided.

The invention discloses a mining air volume monitoring and control system, which relates to the technical field of coal mine safety ventilation and comprises a plurality of intrinsically safe sensors, at least one group of intrinsically safe control boxes, a controller and a power supply, the GQQ5 smoke sensor is connected with the sensor through a flame-retardant communication cable for a coal mine or in an infrared correlation mode to realize data convergence and instruction issuing, and the at least one intrinsic safety type base station is connected with a ground control center through a communication optical cable to support TCP / IP protocol transmission monitoring data. Dust concentration response is dynamically analyzed in combination with the wind speed change trend, linkage control over wind speed and dust concentration is achieved, the opening degree of an air door can be automatically adjusted or a spraying device can be controlled according to the dust raising trend, the underground dust treatment effect is effectively improved, and the method has the advantages of being high in practicability and improving the automation level of ventilation dispatching.

The invention relates to the technical field of electric digital data processing and energy storage system safety control, in particular to an optical storage and charging integrated station energy storage system. Comprising a data acquisition module which is used for acquiring a state feature vector of an energy storage system, planned scheduling power of an upper-layer energy management system, an external power grid interference index, and a real-time safety state and an economic value index of a battery management system in real time; the risk assessment module is used for generating a predictive risk score; the decision threshold module is used for calculating a dynamic intervention threshold; the arbitration decision module is used for generating a negative sign; the instruction correction module is used for determining a derating factor in response to the override mark and generating a correction scheduling instruction; or when the negative sign is not generated, outputting the planned scheduling power as a corrected scheduling instruction. According to the invention, early warning and active prevention of the potential thermal runaway risk are realized, and the intrinsic safety level and the operation reliability of the system are obviously improved.

The invention discloses a metal dust explosion risk comprehensive index early warning method and system, and particularly relates to the technical field of metal dust. The method comprises the following steps: standardizing real-time dust environment data collected in a working site and standard dust data, generating a feature vector, calculating similarity, and identifying a potential abnormal state; processing temperature deviation characteristics and charge concentration fluctuation characteristics are further extracted, a multi-dimensional risk assessment model is constructed, a metal dust explosion risk comprehensive index is calculated by using a polynomial regression algorithm and is compared with a gradient risk threshold value, and multi-stage early warning signal triggering and linkage response control are realized; the method has a self-adaptive recognition capability on a novel or unknown dust state, the accuracy and response timeliness of risk early warning are remarkably improved, and the intrinsic safety guarantee capability of the system under a complex working condition is enhanced.

The invention relates to a coal mine underground intrinsic safety wireless charging type bionic visual inspection system and method.The system comprises a walking mechanism, a photoelectric pod, a charging module, an electrical control system, a sensing module, a charging cabin and a walking track, the walking mechanism is driven by symmetrically-arranged motors, and through cooperation of walking wheels, auxiliary wheels and a clamping device, the photoelectric pod is driven by the charging module; the inspection system can stably run on a walking track, the photoelectric pod can conduct pitching and rotation control so that the visual detection module can conduct all-dimensional and accurate monitoring on the surrounding environment, and the visual detection module comprises a visible light camera, an infrared camera, a laser radar and other sensor equipment. The sensing module comprises a laser dust sensor, an illuminance temperature and humidity sensor, a gas sensor and the like, the charging cabin is fixed on the inspection track, it can be ensured that the inspection robot is automatically charged in a closed environment, the inspection robot can adapt to complex environments such as an underground coal mine, comprehensive, real-time and accurate monitoring of the environment is achieved, and therefore the production safety performance is improved.

The invention discloses an automatic ore loading method of an unmanned electric locomotive. The method specifically comprises the steps that when an unmanned electric locomotive is driven into an ore drawing station and runs to a positioning position, an alignment device detects that alignment of a mine car and a vibration ore drawing machine is completed; confirming that the mine car and the vibratory ore drawing machine are successfully aligned through video AI analysis, braking after successful alignment, and sending out a first automatic ore loading request; starting the vibratory ore drawing machine to load ore to the mine car according to the material level condition; when foreign matter is detected, early warning is given out and pause is carried out, when it is detected that the ore lumpiness exceeds an early warning value, early warning information is given out, and otherwise ore loading continues; and the material level detection device detects the material level of the mine car in real time, when the material level reaches a set value, ore loading of the vibration ore drawing machine is stopped till all the mine cars are fully filled, ore loading is completed, and the unmanned electric locomotive is driven out of the ore drawing station. According to the method, both the mining electric locomotive and the vibration ore drawing machine do not need to be operated by personnel on site, so that less and unmanned on-site operation is realized, and the intrinsic safety of mine operation is improved.

The invention relates to a low-concentration gas intrinsically safe combustion device, which relates to the technical field of coal resource utilization and comprises a safe ignition unit, a multi-stage backfire prevention unit, a multi-blow-off prevention unit, a combustion chamber, a control unit and an explosion venting unit. The safety ignition unit adopts a staged ignition mode, and the 100% ignition success rate is achieved through a high-energy igniter and a combustion starter; the anti-backfire unit forms three-stage protection through a micro-channel, a quick shut-off valve and an anti-detonation flame arrester, and flame returning is blocked; the anti-blow-off unit is combined with a high-heat-insulation labyrinth type combustion chamber by means of the entrainment effect of a swirler and a flame retention module, so that flame is stable and does not break away; the control unit achieves automatic interlocking control through various sensors, and the explosion venting unit conducts directional explosion venting during overpressure. According to the device, the low-concentration gas with the concentration lower than 30% is subjected to intrinsic safety combustion, and the risks of backfire, blow-off and explosion can be avoided.

The invention discloses a coal mine intrinsic safety variable structure open space robot catastrophe detection system, which belongs to the technical field of catastrophe robots and comprises a coal mine intrinsic safety variable structure open space robot consisting of a rack unit, a rotor wing mechanism, a battery unit, a control unit, an airborne sensor unit and the like. The invention further discloses a coal mine intrinsic safety variable structure open space robot catastrophe detection method. The method comprises the steps of collecting underground coal mine disaster photos, making a data set, building a YOLO10m network model and building an underground coal mine catastrophe detection system. And finally, a YOLO10m algorithm is improved, a TSample module is constructed, an up-sampling module in the neck network is replaced, the number of model parameters is reduced, the operation load is reduced, and a low-illumination loss function is provided to optimize the detection precision of the network on the underground coal mine catastrophe, so that the underground coal mine fire, flood and roof catastrophe are detected in the underground coal mine low-illumination environment.

The invention relates to the technical field of aluminum processing production safety, and provides an aluminum processing deep well casting molten aluminum leakage identification and early warning system and method.The system comprises a leakage identification subsystem, a linkage circuit is formed by arranging special aluminum wires at an outlet of a crystallizer, and instant leakage alarm and leakage point positioning are achieved; the leakage rate judgment subsystem is used for judging the leakage rate of the molten aluminum; and the control terminal is used for simultaneously receiving and processing the information of the leakage identification subsystem and the leakage rate judgment subsystem and giving an emergency processing instruction. Through double-judgment cross validation of aluminum conductor leakage triggering and temperature sensing data, the molten aluminum leakage judgment accuracy is remarkably improved, the method can stably adapt to the high-temperature, humid and high-noise environment of deep well casting, early warning lag and positioning fuzziness are effectively eradicated, the risk of explosion accidents caused when molten aluminum encounters water is practically reduced, and the service life of the molten aluminum is prolonged. And reliable support is provided for deep well casting intrinsic safety.

The invention provides a mine rescue flying variable-structure robot and a detection method thereof. The mine rescue flying variable-structure robot comprises a machine body frame, a transmission module, an energy module, a navigation module, a task mounting interface and an anti-explosion safety assembly. The robot adopts an intrinsically safe explosion-proof design and is provided with electronic element explosion-proof components; the transmission module comprises a wheel-wing integrated driving mechanism, a dual-mode switchable transmission system and an intelligent switching control unit, the wheel-wing integrated driving mechanism comprises a multi-rotor wing arm and a propeller in a flight mode, the wheel-wing integrated driving mechanism is folded to form a wheel flange in a moving mode, and automatic mode switching is achieved through an intelligent control algorithm; the navigation module is a multi-mode navigation module and integrates ultra wide band, inertial navigation and mine radio pulse signal positioning; the task mounting interface carries an extensible environment sensor module to detect various complex terrains. Innovation is carried out on the basis of single-mode operation of traditional rescue equipment, land-air dual-mode detection rescue is achieved, and the detection efficiency of the underground post-disaster environment is remarkably improved.

The intrinsically safe power supply comprises a safety isolation transformer, a fuse, a rectification filtering and reverse connection prevention circuit, a lightning protection circuit, a surge and overvoltage protection circuit, a DC / DC conversion circuit and a two-stage overcurrent and overvoltage protection circuit. An R-type safety isolation transformer is matched with a primary side fuse and a secondary side fuse to provide a reliable SELV power supply, a DC / DC circuit is formed based on an LM2676-ADJ chip, a two-stage over-current and over-voltage rapid turn-off protection circuit is formed through a surge protection chip ADM1270, and the nonlinear rectangular power supply output characteristic is provided. The two-stage TVS is arranged at the input end of the DC / DC circuit and the input end of the ADM1270 chip and matched with the fuse for protection, the fuse is fused under the condition that the input voltage is abnormal or the DC / DC fails, the overvoltage protection effect is achieved, and the safety of the chip and the reliability of the power supply are ensured.

The utility model discloses an oil online monitoring system, and belongs to the technical field of oil monitoring. The oil online monitoring system comprises an intrinsic safety cavity, an explosion-proof type through-wall terminal and an explosion-proof cavity, the intrinsic safety cavity is provided with a pipeline and an intrinsic safety oil monitoring sensor, and the intrinsic safety oil monitoring sensor is used for monitoring oil in the pipeline; one end of the explosion-proof wall-through terminal is in communication connection with the intrinsic safety oil monitoring sensor through the explosion-proof wall-through terminal; the explosion-proof cavity is provided with a data acquisition board, an intrinsic safety power supply and a non-intrinsic safety power supply, the non-intrinsic safety power supply is used for supplying power to the data acquisition board, and the intrinsic safety power supply is used for supplying power to the intrinsic safety oil monitoring sensor; and the data acquisition board is in communication connection with the external terminal equipment and the other end of the explosion-proof wall-through terminal, so that explosion-proof protection is realized, the structure is prevented from being damaged, and the safety and reliability are improved.

The utility model provides a mining oil liquid on-line monitoring and collecting instrument which comprises an explosion-proof box body, an intrinsic safety cavity, an explosion-proof cavity, an intrinsic safety cavity device and an explosion-proof cavity device, wherein the intrinsic safety cavity and the explosion-proof cavity are arranged on the inner side of the explosion-proof box body and are isolated from each other, and the intrinsic safety cavity device and the explosion-proof cavity device are respectively arranged in the intrinsic safety cavity. The explosion-proof box body is provided with an oil inlet and an oil outlet which are formed by penetrating through the cavity wall of the intrinsic safety cavity, the intrinsic safety cavity device comprises a detection oil way and an intrinsic safety detection sensor group, oil to be detected enters the detection oil way from the oil inlet and is detected through direct contact of the intrinsic safety detection sensor group, and the intrinsic safety detection sensor group is connected with the explosion-proof box body. The oil to be detected flows out of the oil outlet after being detected by the intrinsic safety detection sensor group; the explosion-proof cavity comprises an intrinsically safe power supply, and the intrinsically safe power supply is used for supplying power to the intrinsically safe detection sensor group. The acquisition instrument disclosed by the utility model can be used for realizing oil liquid detection and also can meet the anti-explosion requirement at the same time.

The invention relates to the technical field of safety control of mining equipment, in particular to a mining intrinsic safety type multi-mode cooperative control system. The system comprises a main controller, a sensor module, a voice alarm module and an equipment execution unit. According to the invention, by setting a hierarchical protection shielding function, an effect of accurately preventing and controlling major safety risks is achieved, based on a dual judgment mechanism of a comprehensive risk coefficient and an operation risk index, an early warning-alarm-emergency response three-level protection system is systematically constructed, and when risks of equipment temperature abnormity, speed overrun and the like are detected, the system can give an alarm. The method comprises the following steps: firstly, triggering voice alarm and reserving emergency disposal time, and automatically shielding a non-key protection function when the risk is upgraded to a system-level emergency state, thereby avoiding economic loss caused by whole-line production halt, breaking through the limitation of once-by-once stopping of a traditional safety system, and remarkably improving the intrinsic safety level of mine production.

The invention discloses a mining explosive-proof and intrinsic safety type track inspection robot, and relates to the technical field of mining robots, the mining explosive-proof and intrinsic safety type track inspection robot comprises a protection mechanism and an inspection camera installed in the protection mechanism, a stable inspection mechanism is arranged at the top of the protection mechanism, and a bidirectional driving motor is arranged in the stable inspection mechanism; the protection mechanism comprises a fixing disc, rotating supports are symmetrically installed on one side of the bottom of the fixing disc, a rotating motor is fixedly installed on the outer side of the rotating support on one side, the output end of the rotating motor is fixedly connected with a rotating worm, and the supporting air bag is punctured under the action of a conical needle; and meanwhile, under the action of an unfolding spring, an unfolding sliding disc is driven to move upwards, under the action of an unfolding rotating rod, a fan-shaped protection plate is closed, and the inspection camera is stored in a second protection cover, so that the inspection camera is protected.

The application provides an intrinsic safety power transient energy testing device and method, and relates to the technical field of intrinsic safety power. The device comprises a load module, a control unit, a control terminal and a detection unit. The load module has at least one load, and each load has a plurality of load units. The control unit is connected with the load module through an adaptive interface module, and is used for selecting the connected load unit. The control terminal is connected with the control unit through a communication interface, selects a load unit mapping figure through a graphical user interface, and further selects the corresponding load unit through the control unit, so as to load the selected load unit to the measured intrinsic safety power. The detection unit is used for connecting and detecting the measured intrinsic safety power loaded with the selected load unit, and is connected with the control terminal to upload the detection result to the control terminal. The device changes the test environment by selecting different loads, so that the test of the intrinsic safety power transient energy is more comprehensive.

The invention discloses a forced measurement system for an underwater hydraulic lifting stage and a digital control method. The forced measurement system comprises one or more forced measurement units; the forced measurement unit operates in a torque control mode, actively applies a constant preset pulling force to the measurement rope, and detects and measures the rotation angle or the number of turns of the winding drum in real time so as to calculate the lifting displacement of the stage; the hydraulic driving unit is used for driving the stage to lift; and the central control unit is in signal connection with the forced measurement unit and the hydraulic driving unit, and is used for receiving the lifting displacement data and outputting a control signal to the hydraulic driving unit according to a preset target position and a movement track so as to realize closed-loop control on the stage position. Through an external forced measurement unit and a torque control mode, non-contact high-precision direct measurement is realized, the water immersion of a measurement element is fundamentally avoided, the waterproof problem is solved, and the intrinsic safety and long service life of the system are ensured.

1. Name of the designed product: combined frequency starter (mine explosion-proof and intrinsically safe type). 2. Use of the designed product: used for controlling explosion-proof motor in coal mine. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best indicating the design points: front view.