32results about How to "Guaranteed power off" patented technology

Disclosed a coiling machine for power cord comprises a coiling box, a coiling wheel inside the coiling box, limited rings on the two ends of coiling wheel, and crinkle spring inside the coiling axle sleeve to connect the coiling axle corn. The invention is characterized in that the protruded part of coiling axle sleeve is equipped a electric connecting component formed by a conducting outer layer, a insulated inner layer and a conducting axle corn; a coiling-proof wheel formed by stop arm and vertical binding post is arranged on the outside of limited ring, as a stop connecting component which can rotate to make a group of electrical contacts connect. The stop function which is synchronous to the electrical connection can reduce the tensity between plug and the power cord, to make the plug connect the adapter firmly; in addition, it coils without electric to improve the safety of household appliance which also can prevent the knotting inside the box.

The invention discloses a repeatable connecting and separating device. The repeatable connecting and separating device comprises a shell, a motor, a driving part, a locking hook, a guide part and pinshafts, wherein the motor is installed on the shell, the locking hook, the driving part and the shell sleeve the guide part in sequence, after the pin shafts are fixedly connected with the locking hook, the two ends of the pin shafts protrude on the surface of the locking hook, one ends of the pin shafts are clamped into first curve grooves of the guide part, and the other ends of the pin shafts are clamped into second curve grooves of the driving parts; the shell is fixedly connected with the guide part; the motor drives the driving part to rotate horizontally, the driving part horizontally rotates to make the pin shafts relatively move in the second curve grooves of the driving part, and meanwhile, the relative motion of the pin shafts is limited by the first curve grooves of the guide part; the pin shafts drive the locking hook to stretch out of or draw back from the shell; the locking hook is used for locking or unlocking an outer connecting and separating device. A fastening separating device of a modularized spacecraft comprises a compressing releasing device and the repeatable connecting and separating device.

The present invention relates to a steam vacuum cleaner and its handspike assembly body and hose assembly body. The cleaner comprises a cleaner body; a hose assembly body one end of which connects to the cleaner body demountably; a handspike assembly body which connects to the other end of the hose assembly body demountably; a ground brush with steam generating device which connects with the handspike assemble body demountably. A first electrical wire is arranged on the handspike assembly body, a second electrical wire is arranged on the hose assembly body, the first electrical wire connects to the ground brush demountably, one end of the second electrical wire connects to the first electrical wire demountably, and the other end of the second electrical wire connects to the cleaner body demountably. When using the cleaner, to supply power for the cleaner body and the ground brush through the first electrical wire and the second electrical wire; when packaging the cleaner, to cut off the connection of the first electrical wire and the ground brush, the connection of the second electrical wire and the cleaner body, so as to cut off the connection of the ground brush and the cleaner body completely, which ensures the volume after packaging be small and convenient for carry.

The invention relates to the field of life, and particularly provides a seat capable of correcting a sitting posture. The seat includes a warning mechanism, a controlling mechanism, a backrest plate,a fixing mechanism, a front protective plate, a supporting mechanism, a placement mechanism, a rotating shaft, an upward pulling mechanism and an adjusting mechanism. The warning mechanism is disposedin the backrest plate. When a switch is turned on and a user utilizes the seat to correct a sitting posture, if the body is offset towards the backrest plate, a follow block moves backward to extrudea spring so that first and second baffle blocks are electrically connected and a loudspeaker gives an alarm to prompt the user to adjust the sitting posture, and correction effects are good. The topof the supporting mechanism is provided with the adjusting mechanism. After the switch is turned off, a first copper sheet is electrically disconnected from the loudspeaker, thus ensuring that the loudspeaker is powered off when the first and second copper sheets are in contact. Adjustment is made according to user height by the adjusting mechanism so that a user can take a rest and use variety ofthe seat is increased. A slider block is slidingly connected inside the backrest plate and the height of the slider block can be rapidly adjusted according to height of the user so that operation issimple.

The invention discloses a mechanical anti-misoperation locking device for a 6kV high-voltage switch cabinet, relates to the technical field of high-voltage switch control, and aims to solve the problem that a worker cannot conveniently control a revolving door from the inner side of the revolving door while opening the revolving door since an existing anti-misoperation locking device is mainly controlled through a mechanical lock and is complex to operate. The mechanical anti-misoperation locking device for the 6kV high-voltage switch cabinet comprises a cabinet body, wherein a revolving dooris rotationally arranged on the front side of the cabinet body through hinge connection; a middle frame is fixedly arranged in the middle of the inner side of the revolving door; and a control shaft is rotationally arranged at a lower position in the middle of the inner side of the cabinet body. The revolving door can be fixed through a control rack; the revolving door can be controlled from the outside through a hand wheel; the revolving door can be controlled conveniently from the inside through a knob; and after the control shaft drives a main control gear to rotate, the control rack is meshed for moving towards one side, so that the revolving door can be aligned with the inner wall of the front side of the cabinet body by using the control rack, and can be fixed by matching insertion blocks.

The invention discloses an electronic control VE type distribution pump and a flameout method thereof. The electronic control VE type distribution pump comprises an oil pump assembly, an oil inlet pipe and an oil inlet screw, wherein an oil inlet of a pump body of the oil pump assembly is connected with the oil inlet screw, the oil inlet screw is connected to one end of the oil inlet pipe, the other end of the oil inlet pipe is connected to an oil tank, an oil inlet electromagnetic valve is arranged on a pump head of the oil pump assembly, an oil inlet hole, an oil outlet hole and a guide holewhich is formed between the oil inlet hole and the oil outlet hole are formed in the oil inlet screw, an oil cut-off electromagnetic valve is arranged at the upper part, located at of the guide hole,in the oil inlet screw, and an armature of the oil cut-off electromagnetic valve is arranged in the guide hole to move back and forth so as to enable the oil inlet hole and the oil outlet hole of theoil inlet screw to communicate with each other or to be closed. According to the electronic control VE type distribution pump and the flameout method thereof, the oil inlet screw is designed to be the provided with the oil cut-off electromagnetic valve capable of cutting off oil inlet of the electronic control VE type distribution pump, when the electromagnetic valve is powered off, oil inlet ofthe electronic control VE type distribution pump can be cut off, and by means of the coordination of the power failure and oil cut-off of an oil inlet electromagnetic valve of the pump head, the powerfailure of the electronic control VE type distribution pump can be realized so that an engine can be rapidly stopped.

The invention discloses a variable-pitch system with a rectifier device, which comprises an alternating current input end and a direct current output end. The variable-pitch system with the rectifier device is characterized in that the rectifier device for rectifying alternating current into direct current is arranged between the alternating current input end and the direct current output end. A capacitor for avoiding jitter during system power supply switching is connected between the rectifier device and the direct current output end. The capacitor is an electrolytic capacitor of 400V / 1000UF. The invention has the advantages that the rectifier device is additionally arranged in the variable-pitch system to certify alternating current into pulsating direct current; stable direct current is output after voltage divider and filter; the electrolytic capacitor with large capacity is chosen to reinforce the filtering effect; and the motor can run without jitter at the very moment when three phase alternating current is cut off and a back-up power comes into use.

A connector device comprises a connector and a mating connector which is mateable with the connector. The connector comprises a housing, a power-supply terminal and a detection terminal. The mating connector comprises a mating housing, a mating power-supply terminal and a mating detection terminal. One of the housing and the mating housing is provided with a first release portion. One of the housing and the mating housing is provided with a second release portion. One of the housing and the mating housing is provided with a prevention portion. The connector is able to take on any of three states with respect to the mating connector. When the connector is in a first state, the prevention portion is located between the first release portion and the second release portion in an operating direction and prevents the second release portion from being subsequently operated upon operation of the first release portion. The connector device can certainly ensure a sufficient time interval betweendisconnection of a detection terminal from a mating detection terminal and disconnection of a power-supply terminal from a mating power-supply terminal.

The invention provides a household electric cooker. The household electric cooker comprises a magnetic steel temperature limiter, the magnetic steel temperature limiter comprises an aluminum cover, asoft magnet, a soft support, a hard magnet, a hard support, an inner spring, a small cup and a pull rod, the soft magnet, the soft support, the hard magnet, the hard support and the inner spring are all located in the small cup, one end of the pull rod is fixedly connected with the hard support, the other end of the pull rod penetrates out of the small cup and is movably arranged, the inner springis arranged between the hard support and the aluminum cover, the soft magnet and the hard magnet are both located in the inner spring, the magnetic steel temperature limiter further comprises a temperature sensing deformation component, the temperature sensing deformation component is located in the inner spring, one end of the temperature sensing deformation component is fixedly connected with the soft support, and the other end of the temperature sensing deformation component directly faces the hard support. The problem that a magnetic steel temperature limiter is burnt down and even a firedisaster is caused due to the fact that a heat preservation piece and a contact on a lever of an electric cooker are sintered and bonded together and an inner spring in the magnetic steel temperaturelimiter cannot drive the heat preservation piece to be separated from the lever contact through a pull rod can be avoided.

The invention belongs to the technical field of automobile control systems and provides a vehicle-mounted charging mode end phase control method. The method comprises steps as follows: whether a vehicle-mounted charging relay is disconnected is detected after a command for disconnecting the vehicle-mounted charging relay is sent; if yes, whether a main positive sequence relay and a main negative sequence relay are disconnected is detected after a command for disconnecting the main positive sequence relay and the main negative sequence relay is sent; if the main positive sequence relay and the main negative sequence relay are both disconnected, the vehicle-mounted charging relay is successfully disconnected. With the adding of the process of detecting whether a vehicle-mounted charger, the main positive sequence relay and the main negative sequence relay are disconnected, disconnection of the whole high-voltage relay is guaranteed, damage to a battery pack due to unsuccessful disconnection of the high-voltage relay is avoided, and the service life of the battery pack is prolonged. Meanwhile, the safety level of the vehicle is improved with the control method, and the vehicle performance is optimized.

The invention discloses a switch core part structure capable of preventing an action dead point. The switch core part structure comprises a base, a base assembly and a movable assembly; a pass-through hole is formed in the top surface of the base; the base assembly comprises a lower cover, a left normally-open connecting-inserting assembly, a right normally-open connecting-inserting assembly, a left normally-closed connecting-inserting assembly and a right normally-closed connecting-inserting assembly; rectangular holes are formed in the two side edges of the lower cover; positioning blocks are embedded on the rectangular holes respectively; the movable assembly comprises a movable rod, a pressing block, elastic assemblies, a movable contact piece base, a movable contact piece and a reset spring; a groove is formed in the top end of the movable rod; a convex block is arranged at the bottom end of the pressing block; the convex block is embedded in the groove; the reset spring is arranged below the movable contact piece base; the bottom end of the movable rod is connected with the top end of the reset spring; the elastic assemblies are connected with the two sides of the movable rod; through holes are formed in the side walls of the movable contact piece base; the elastic assemblies passes through the through holes to be in contact with the corresponding positioning blocks; and the movable contact piece is arranged on the movable contact piece base. By virtue of the switch core part structure, the phenomena of signal flickering or power failure can be solved, and switch action parameters and repeated precision can be improved.

The invention belongs to the technical field of automobile control systems and provides a vehicle-mounted charging mode end phase control method. The method comprises steps as follows: whether a vehicle-mounted charging relay is disconnected is detected after a command for disconnecting the vehicle-mounted charging relay is sent; if yes, whether a main positive sequence relay and a main negative sequence relay are disconnected is detected after a command for disconnecting the main positive sequence relay and the main negative sequence relay is sent; if the main positive sequence relay and the main negative sequence relay are both disconnected, the vehicle-mounted charging relay is successfully disconnected. With the adding of the process of detecting whether a vehicle-mounted charger, the main positive sequence relay and the main negative sequence relay are disconnected, disconnection of the whole high-voltage relay is guaranteed, damage to a battery pack due to unsuccessful disconnection of the high-voltage relay is avoided, and the service life of the battery pack is prolonged. Meanwhile, the safety level of the vehicle is improved with the control method, and the vehicle performance is optimized.

The present invention disclose a motor line protection device which comprises a shell, two power connection blocks are inserted in the two side walls of the shell in a penetrating manner, a partition plate is fixed to the inner wall of the shell, a connecting rod is slidably connected to the side wall of the partition plate in a sealing and penetrating manner, and a speed limiting box and a power connection rod are fixed to the two ends of the connecting rod respectively. An electromagnet is fixed to the inner wall of the shell, a speed control mechanism is arranged in the speed limiting box, and power connection mechanisms are arranged at the two ends of the power connection rod. The device has the advantages that by arranging the transfer groove, when large-amplitude overload occurs, the larger the overload amplitude is, the larger the extension degree of the telescopic rod is, the larger the displacement amount of the baffle is, hydraulic oil can pass through the transfer groove in a larger amplitude, the larger the overload amplitude is, the stronger the magnetism is, the stronger the adsorption capacity to the speed limiting box is, and on the whole, the larger the overload amplitude is, the higher the moving speed of the speed limiting box is, the higher the power-off speed is, and the electrical safety of the motor is effectively protected.

The invention discloses an intelligent home circuit control system. According to the system, a plurality of switches controlled by infrared thermal sensors respectively are connected in series with astrong current / weak current home circuit; and the infrared thermal sensors are respectively arranged by taking the room as a unit. Power on-off of electric lamps and appliances in the rooms can be generally controlled by virtue of the infrared thermal sensors in the various rooms; the power off time is prolonged by a time-delay relay, and power on-off linkage of each room is ensured; due to an independent energized circuit, continuous power consumption requirements of electric appliances such as a refrigerator and the like are ensured; due to a multi-control circuit, continuous use of other electric appliances is ensured, and when a user is not at home, power outage is ensured. The intelligent home circuit control system is simple in structure and convenient to use, power consumption is based on a principle of people first, the circuit is turned on and off in time, lots of energy is saved, the home circuit is simplified, and the control system has excellent practicality and wide applicability.

A power cord winder, which includes a winding box, a winding wheel located in the winding box and wire limiting rings at both ends, a coil spring connected to the winding shaft core at one end inside the winding sleeve, and is characterized in that An electrical connection assembly consisting of a conductive outer layer, an insulating inner layer and a conductive shaft core is provided on the protruding part of the bobbin sleeve; the outer side of the wire limiting ring is provided with a stopping rod connected to a vertical terminal to prevent the reel from rotating. Detent engagement assembly that simultaneously engages a set of electrical contacts. The synchronous interlocking function of the stopper and the electrical connection of the present invention can reduce the tension of the plug and the power cord so that the plug and the socket can be joined firmly, and there is no electricity when winding the wire, which increases the safety of household appliances and can effectively prevent random winding or breaking in the box. Knot.

The invention discloses a mechanical error-proof locking device for a 6kV high-voltage switchgear, relates to the technical field of high-voltage switch control, and solves the problem that the currently used anti-mistake locking device is mainly controlled by a mechanical lock, and the operation is cumbersome. Sometimes, it is inconvenient to control the revolving door from the inner position of the revolving door. A 6kV high-voltage switch cabinet mechanical anti-mistake locking device, including a cabinet body; the front side of the cabinet body is twisted and connected with a revolving door; the inner side of the revolving door is fixed with an intermediate frame; the cabinet body There is a control shaft rotating at the lower part of the inner side of the inner side. By setting the control rack, the revolving door can be fixed. The revolving door can be controlled from the outside by using the hand wheel, and the revolving door can be controlled from the inside by using the knob. The control is convenient. Through the control The shaft drives the main control gear to rotate and then engages the control rack to move to one side. The control rack can be used to align the revolving door with the front inner wall of the cabinet and fix it with the insert block.

The invention discloses an LED (Light-Emitting Diode) underwater lamp with high security. The LED underwater lamp comprises a triangular support base, a rotary disk, a U-shaped frame and a shell, wherein an inner frame clings to the inner wall of the shell; an inner frame flange is arranged at the top end of the inner frame; a light-transmitting lens clings to the inner frame flange; a limiting ring is clamped on the inner frame flange; the bottom of the inner frame is provided with a water seepage hole; a stabilizing groove is formed inside the inner frame; a groove flange is arranged at thetop end of the stabilizing groove; the groove flange clings to the inner wall of the inner frame; an LED integrated lamp panel assembly is arranged in the stabilizing groove; the space between the stabilizing groove and the inner frame is filled with a filling agent swelling with water; a sealing ring is arranged on the groove flange; and press-fit sealing is formed between the sealing ring and the limiting ring. The bottom end of the LED lamp panel is filled with the filling agent, the filling agent swells with water and ejects internal elements of the lamp and the inner frame out, the press-fit sealing is formed between the sealing ring and an annular connection ring, and a shell is replaced directly, so that the influence of water ingress of the shell on the security of the lamp duringworking is lowered.

The invention provides a connector device, which includes a connector and a mating connector that can cooperate with the connector. The connector includes a housing, a power supply terminal and a detection terminal, and the mating connector includes a mating housing, a mating power supply terminal and a mating detection terminal. One of the housing and the mating housing is provided with a first release part, one of the housing and the mating housing is provided with a second releasing part, and one of the housing and the mating housing is provided with a protective part, and the connector can be connected with the mating The connector fits in any of the three states. When the connector is in the first state, in the operation direction, the protective part is located between the first release part and the second release part, which can prevent the second release part from operating after the first release part is operated. be operated accordingly. The invention can ensure that there is a sufficient time interval between the disconnection of the detection terminal and the coordination detection terminal, and the disconnection of the power supply terminal and the coordination power supply terminal.

The invention discloses a repeatable connecting and separating device. The repeatable connecting and separating device comprises a shell, a motor, a driving part, a locking hook, a guide part and pinshafts, wherein the motor is installed on the shell, the locking hook, the driving part and the shell sleeve the guide part in sequence, after the pin shafts are fixedly connected with the locking hook, the two ends of the pin shafts protrude on the surface of the locking hook, one ends of the pin shafts are clamped into first curve grooves of the guide part, and the other ends of the pin shafts are clamped into second curve grooves of the driving parts; the shell is fixedly connected with the guide part; the motor drives the driving part to rotate horizontally, the driving part horizontally rotates to make the pin shafts relatively move in the second curve grooves of the driving part, and meanwhile, the relative motion of the pin shafts is limited by the first curve grooves of the guide part; the pin shafts drive the locking hook to stretch out of or draw back from the shell; the locking hook is used for locking or unlocking an outer connecting and separating device. A fastening separating device of a modularized spacecraft comprises a compressing releasing device and the repeatable connecting and separating device.

The invention discloses a spraying station XY shafting safety detection system. According to the technical scheme, the system comprises a transversely-arranged safety grating and a longitudinally-arranged safety grating, the transversely-arranged safety grating and the longitudinally-arranged safety grating are used for detecting operators entering a spraying station, when the gratings are blocked, the transversely-arranged safety grating or the longitudinally-arranged safety grating outputs a blocking signal, the transversely-arranged safety grating and the longitudinally-arranged safety grating are both coupled with a processor, the processor outputs a control signal when receiving the blocking signals output by the safety gratings, the processor is further coupled with a relay, the normally-closed contact of the relay is coupled with a power supply circuit of the spraying station, when the relay receives the blocking signals, the normally-closed contact is controlled to be disconnected, and therefore the occurrence of accidents caused when the operators enter the spraying station can be reduced.

An electric appliance zero lock device comprises a mounting plate, a position adjusting lock arranged on the right side of the mounting plate, a handle wheel arranged on the left side of the mounting plate and a transmission wheel arranged between the position adjusting lock and the handle wheel. Due to the fact that the handle wheel, the position adjusting lock and the transmission wheel between the handle wheel and the position adjusting lock are adopted by the zero lock device, when the position adjusting lock is in an automatic or a manual state, an electric appliance product can run normally under and automatic or manual situation, when the handle wheel and the position adjusting lock are in the situation that a zero position is locked, no auxiliary equipment needs to be added, mechanical zero lock can be carried out on electric appliances conveniently, it is guaranteed that the electric appliances and loads are powered off under the condition that the zero position is locked, the using safety of the electric appliances is guaranteed, and the device is simple in structure and convenient and reliable to use.

The invention discloses a spraying station XY shafting safety detection system. According to the technical scheme, the system comprises a transversely-arranged safety grating and a longitudinally-arranged safety grating, the transversely-arranged safety grating and the longitudinally-arranged safety grating are used for detecting operators entering a spraying station, when the gratings are blocked, the transversely-arranged safety grating or the longitudinally-arranged safety grating outputs a blocking signal, the transversely-arranged safety grating and the longitudinally-arranged safety grating are both coupled with a processor, the processor outputs a control signal when receiving the blocking signals output by the safety gratings, the processor is further coupled with a relay, the normally-closed contact of the relay is coupled with a power supply circuit of the spraying station, when the relay receives the blocking signals, the normally-closed contact is controlled to be disconnected, and therefore the occurrence of accidents caused when the operators enter the spraying station can be reduced.

The invention relates to an electric hoist for mechanical equipment transferring in a workshop manufacturing and scheduling process. The problem that in the prior art, safety is poor when outages and overload often happen is effectively solved. According to the technical scheme, the electric hoist comprises a lifting device and a braking device. The braking device comprises a first driving rotating shaft, wherein the first driving rotating shaft drives a roller to rotate. A rolling wheel is arranged on the first driving rotating shaft, and a brake is arranged on the rolling wheel. A clamping plate is connected to a fixing plate in a rotating mode, the end of the clamping plate makes contact with a first protruding block of a cross-shaped rotating plate, an arc-shaped groove is formed in the lower end of the clamping plate, and a push rod is arranged in the arc-shaped groove. A first sliding shaft is arranged at the lower end of the fixing plate, a push rod sleeve is arranged on the first sliding shaft, and one end of the push rod abuts against the arc-shaped groove so that the push rod cannot penetrate through the clamping plate. Push plates are connected with the two ends of the cross-shaped rotating plate in a rotating mode, and the two push plates are connected through a first spring with high toughness. A second protruding block is arranged on the push rod, the push plates are blocked by the second protruding block, and the ends of the push plates are connected with the brake. By the adoption of the electric hoist, the situation that the danger appears is greatly reduced.

The invention discloses an energy-saving lamp time-delay circuit. A 220V alternating current voltage is reduced by a capacitor C3, rectified by a diode D3 and a diode D2, stabilized by a voltage stabilizing tube DW and filtered by a capacitor C2, so as to obtain a direct current voltage; a series circuit is connected in parallel with two sides of the capacitor C2; a capacitor C1 and a resistor R4 are connected in series with the series circuit; two sides of the resistor R4 are connected in parallel with a composite tube electronic switch circuit; the output end of the composite tube electronic switch circuit is connected with a base b of a base transistor VT1; a collector c of the transistor is connected with a pin 1 of a bidirectional silicon-controlled rectifier BCR; a pin 2 and a pin 3 of the bidirectional silicon-controlled rectifier BCR are connected in parallel on two sides of a button AN. The composite tube electronic switch comprises a transistor VT2 and a transistor VT3, so that the input resistance is improved, and the delay amount is ensured; after the bulb goes out, the whole circuit is completely powered off, and the energy-saving effect is obvious; the bidirectional silicon-controlled rectifier serves as a breakpoint switch, only one trigger circuit is needed, the response is extremely fast, non-contact operation is realized, and the energy-saving lamp time-delay circuit is free of spark and noise, high in efficiency and low in cost.

The invention discloses a phase change power strip and belongs to the field of electrical components. The phase change power strip structurally comprises a shell, a switch, a jack area and a power line. The other surface, in connection with the power line, of the shell is provided with a switch; the center of the surface of the shell is provided with the jack area; one end, in connection with the power line, of the shell is provided with a phase change outlet; one end of the power line is connected with a power plug; the other end of the power plug is connected with a phase change plug; the phase change plug is connected with the phase change outlet by insertion fit. Compared with the prior art, the phase change power strip has the advantages such as reasonable design, simple structure, ease of processing, convenience of use, safety and reliability; concealment and attractiveness are improved; when breakage of a zero wire of the switch leads to an electric appliance being live when powered off, a live wire of the switch can be disconnected by turning the phase change plug at 180 degrees, and thus the electric appliance can be thoroughly powered off.

The invention discloses power-on inspection equipment for a power connecting line. The technical problem of the invention is to provide the power-on inspection equipment for a power connecting line, and the equipment is convenient for batch inspection of power connecting lines, automatic pressing and fixing of the power connecting lines and automatic unlocking of the power connecting lines, and for providing fuses to ensure safe operation of the equipment. The power-on inspection equipment for a power connecting line comprises a shell, wherein the middle part of the shell is provided with a placing assembly; a prompting assembly arranged on one side of the upper part of the shell; a supporting assembly arranged between the upper side of the interior of the shell and the prompting assembly; and a socket arranged on the supporting assembly. The power-on inspection equipment for the power connecting line disclosed by the invention has the advantages that the power connecting line is automatically pressed and fixed, the power connecting line is automatically unlocked, and power failure and safety are ensured when the equipment breaks down.

The invention discloses an engine switch automatic control method and system and engine test run equipment. The method comprises the following steps: acquiring T15 switch message data sent by an upper computer; transmitting the T15 switch message data to a switch control device through a first communication channel, so as to enable the switch control device to control the T15 switch to be connected or disconnected according to the T15 switch message data; and acquiring state detection data of the T15 switch by using a second communication channel, and transmitting the state detection data to an upper computer, so as to enable the upper computer to judge whether the T15 switch is completely powered off according to the state detection data. The upper computer and the switch control device are provided with two channels, the on-off state of the T15 is monitored while the on-off automatic control of the T15 is realized, the influence of the abnormal power failure of the T15 on the controller is eliminated, the potential safety hazard is reduced, and the safety performance is improved.