1419 results about "Cut-off" patented technology

The invention relates to the technical field of power distribution automation auxiliary power supply control, and discloses an intelligent power distribution circuit system for a digital ring main unit, which comprises a transient voltage gradient induction bridge circuit, a hardware signal processing circuit, a power switch unit and a controlled energy release unit, according to the system, a transient voltage gradient induction bridge circuit is used for collecting a primary side bus voltage change rate signal, a hardware signal processing circuit carries out derivation operation on an induction signal and compares the induction signal with a voltage gradient threshold value, and a power switch unit is blocked at the moment that the voltage abnormally drops so as to cut off a load current path. According to the invention, a hardware parameter direct mapping mechanism is utilized to realize microsecond transient protection response, and the physical decoupling of protection logic and digital software is realized by balancing bus potential pulse caused by sudden unloading of a load through the inherent dehumidification resistor in the multiplexing cabinet.

A high-linearity grid voltage bootstrap circuit relates to the technical field of analog-to-digital conversion and comprises a first charge pump boosting unit, a second charge pump boosting unit and a grid voltage bootstrap unit, working states of a sampling switch are divided into a sampling state and a holding state, an input voltage VIN is boosted to a VG through the grid voltage bootstrap unit in a sampling stage, and the sampling switch is switched on; and the holding stage sampling switch is cut off, and charges are injected to the upper polar plates of the capacitors C3 and C4 of the gate voltage bootstrap unit through the first charge pump boosting unit and the second charge pump boosting unit respectively. According to the invention, the problem that the actual gate-source voltage is reduced due to the grid parasitic capacitance of the sampling switch is solved, and the layout area occupation is greatly reduced while the bootstrap voltage is improved; the proportion of the capacitor C3 and the capacitor C4 can be flexibly set to obtain the required bootstrap voltage; and the problem that the on-resistance of the sampling switch is increased due to the reduction of the gate-source voltage can be solved, and the linearity of the sampling switch is improved.

The invention provides an intelligent fuse, and belongs to the technical field of circuit protection, and the intelligent fuse is characterized in that an upper housing is provided with at least one excitation chamber, the excitation chamber is internally provided with at least one excitation part and at least one impact part, and the excitation part releases high-pressure gas when receiving any one of an external trigger signal and an internal trigger signal; the lower shell is provided with at least one cooling cavity; the current-conducting plate is arranged between the upper shell and the lower shell, and the impact part moves towards the direction where the cooling cavity is located under the thrust action of the high-pressure gas so as to cut off the current-conducting plate; the self-control module is arranged outside the shell and comprises a current detection unit and a processing unit, and the current detection unit is used for detecting a current signal on the conductive plate; the processing unit is used for generating an internal trigger signal according to the current signal. The beneficial effects of the invention are that a dual-trigger mechanism and redundancy design of an internal trigger signal and an external trigger signal are adopted, so that normal action can still be ensured when any signal fails, and the breaking reliability is improved.

The invention provides a combined full-range controllable protection device, which belongs to the technical field of circuit protection and comprises a trigger body, a breaker and a fuse. The trigger body and the breaker are connected in series, and the trigger body and the breaker which are connected in series are connected in parallel with the fuse; when the circuit is abnormal, the trigger body is fused to carry out primary protection on the circuit, the fused trigger body also generates an electric signal and transmits the electric signal to the breaker, the breaker cuts off the circuit to carry out secondary protection on the circuit, current flowing through the trigger body and the breaker is merged into a branch where the fuse is located, and the fuse is fused to form third-level protection on the circuit; therefore, multi-stage protection is realized through the trigger body, the breaker and the fuse, and the time sequence cooperation of multi-stage protection actions not only avoids misoperation, but also can provide redundancy protection when a serious fault occurs, so that quick response and reliable cut-off when the circuit is abnormal are realized on the basis of keeping low loss when the circuit is normal, and the circuit breaker can be suitable for high-voltage and large-current breaking.

The invention relates to an intelligent identification and conversion control method for a charging interface of a multi-standard charging pile in the field of new energy automobiles, and the method comprises the steps: carrying out the mode matching analysis of interface physical feature data and communication signal feature data, and obtaining a preliminary classification result of the type of a charging interface device; according to the loading result of the communication configuration parameters, obtaining a confirmation feedback signal of successful protocol switching; judging whether the load demand data conforms to a rated output power range of a charging interface device or not; according to the authorization instruction, current intensity data including a peak value and an average level and voltage level data including a fluctuation amplitude in the charging process are monitored in real time; if the current intensity data or the voltage level data exceed a preset safety threshold value, power supply connection is disconnected, and a circuit path is cut off; and generating a power-off record log containing abnormal fluctuation data and a power-off moment according to a result of disconnecting the power supply connection.

The invention relates to the technical field of circuit breakers, and discloses a fast-to-install primary and secondary fusion pole-mounted circuit breaker which comprises an installation frame and a circuit breaker body arranged on the installation frame, and core power electronic components such as an insulated gate bipolar transistor (IGBT) chip and a module are integrated in the pole-mounted circuit breaker body. The mounting rack is used for mounting a circuit breaker body to realize the functions of automatically cutting off a circuit and remote communication when a fault occurs, the mounting rack comprises a clamping assembly and a supporting piece, the supporting piece is used for mounting the circuit breaker body, and the clamping assembly is used for fastening the supporting piece on a telegraph pole. According to the pole-mounted circuit breaker, assembling and wiring of the circuit breaker body are completed on the ground firstly, then the circuit breaker body is rapidly fixed to the telegraph pole through the installation frame, the effect of improving the installation efficiency and reliability of the pole-mounted circuit breaker is achieved, and meanwhile the use flexibility of the installation frame is high.

The invention provides a power cooperative control method, device and system based on load removal and a medium. The method is applied to a micro-grid configuration flexible interconnection device for micro-grid fault protection. After the fault is positioned, a VSG low-voltage ride-through strategy is adopted to carry out current limiting, an importance quantification model is constructed for loads, and according to a real-time operation condition, a shearable load with the minimum influence on the system is screened to carry out priority removal; and dynamic power transmission adjustment of the flexible interconnection device is synchronously triggered, a micro-grid power flow path is reconstructed, and finally a fault is removed based on a current limiting and directional element protection method. According to the invention, system protection is realized by fusing intelligent load removal and flexible power adjustment, and the fault isolation speed and the stability of the microgrid system are effectively improved.

Technology for programing NAND memory. A memory system has control circuitry that applies a low voltage (e.g., VSS) to SGS lines in one or more unselected blocks that neighbor a block that has been selected for programming. This low voltage keeps source select transistors off, which cuts off the NAND channels in the neighbor unselected block(s) from the source line. The control circuit may float the SGS lines in other unselected blocks, which allows the source line voltage to ramp up quickly to provide for a faster programming operation.

The invention discloses a semiconductor laser and a preparation method thereof, which can be used in the field of semiconductor device preparation, and the method comprises the steps: firstly, providing a first conductive type substrate; then, epitaxially growing a buffer layer of a first conduction type, a lower optical waveguide limiting layer, a quantum well active light-emitting layer, an upper optical waveguide limiting layer, a corrosion barrier layer, a current injection layer and an intrinsic ohmic contact layer on the substrate in sequence to obtain a multi-layer epitaxial layer; then, etching the multi-layer epitaxial layer to the corrosion barrier layer based on a preset pattern to form a ridge-shaped table which starts from the intrinsic ohmic contact layer and is deeply cut off to the corrosion barrier layer; and finally, performing particle doping in a region corresponding to the ridge-shaped table, and converting one sides, close to the corrosion barrier layer, of the intrinsic ohmic contact layer, the current injection layer, the corrosion barrier layer and the upper optical waveguide limiting layer into a second conduction type. Therefore, current limitation can be realized without performing multiple epitaxy like a traditional buried heterojunction, and the production cost and the process difficulty are greatly reduced.

The invention belongs to the technical field of electrical equipment monitoring, and provides an intelligent monitoring method and system for building construction electrical equipment in order to solve the problems that the monitoring dimension is single and hidden dangers such as electrical fires and mechanical faults are difficult to find in advance, and the method comprises the steps that a data collection module collects electrical parameter data and images; the data processing module processes the data; the image analysis module identifies abnormal conditions; the data analysis module identifies abnormal conditions; the comprehensive evaluation module is used for comprehensively evaluating and predicting potential risks; and the intelligent decision support module optimizes a dynamic power supply strategy. According to the invention, early warning of hidden dangers such as electrical fire and mechanical faults is realized; the fault trend of the equipment is predicted, the downtime of the equipment is reduced, the fault is quickly positioned, and the power supply is quickly cut off when abnormality of the electrical equipment is detected; and the operation temperature of the equipment is maintained in a safe interval.

An on-line program control excitation power supply with quench protection for a high-temperature superconducting magnet comprises a single-chip microcomputer for receiving control data, outputting control voltage through digital-to-analog conversion (DAC) of the single-chip microcomputer, and magnetizing a magnet coil through current stepping; a sampling signal is output to the liquid crystal screen to display corresponding voltage and current values in real time after being processed by the single-chip microcomputer analog-to-digital conversion ADC; voltage signals at the two ends of the magnet coil are sampled and returned to the single-chip microcomputer to be processed, when high voltage occurs, it is judged that the voltage signals are abnormal voltage signals, quench protection is carried out, the single-chip microcomputer outputs control signals to cut off connection between the magnet coil and the excitation power source, and residual energy of the magnet coil is released through the high-power thyristor. The provided excitation power supply has the characteristics of high power, high stability, good repeatability and good linearity; performing numerical control stepping output, gradually applying current to the superconducting coil, and slowly establishing a magnetic field; effective quench protection is achieved, and it is guaranteed that a magnet coil is not damaged by quench.

The invention provides a leakage protection method and device of a high-voltage charging system and a charging pile, and relates to the technical field of charging piles, and the method comprises the steps: obtaining leakage current data of the high-voltage charging system collected based on a fluxgate sensor or a tunnel magnetoresistance effect chip in a first time period; fitting a change curve by applying a third-order moving average algorithm according to the leakage current data, and judging whether the high-voltage charging system is subjected to insulation degradation or not according to the change curve; if it is determined that insulation degradation occurs, a high-voltage line of the high-voltage charging system is controlled to be cut off; according to the method, tiny electric leakage can be identified, and the tiny electric leakage can be prevented from developing into a serious fault through insulation degradation trend analysis, so that the detection performance is greatly improved.

The invention discloses an output overvoltage protection self-locking circuit and a switching power supply. The circuit comprises a first switching module, a second switching module, a first control self-locking module and a second control self-locking module, the first control self-locking module is used for determining that the output voltage exceeds the reference voltage, controlling the first switch module to cut off the power supply input, and self-locking and maintaining the cut-off state of the first switch module to the power supply input; and the second control self-locking module is used for determining that the output voltage exceeds the reference voltage, controlling the second switch module to cut off the output loop, and self-locking and maintaining the cut-off state of the second switch module to the output loop. According to the invention, two completely independent overvoltage protection loops are adopted to form a heterogeneous redundancy design, so that the reliability is greatly improved; in addition, self-locking after overvoltage protection can be achieved, the protection function can be released only when input power supply is restarted, and it is ensured that the system can be in a safe state continuously and stably.

The invention provides a charging system with high-voltage protection, which relates to the technical field of elevator emergency power supply and comprises a transformer, a voltage stabilizing circuit, a sampling circuit, an on-off circuit, a surge protection circuit, a constant current and voltage stabilizing circuit and a control circuit. The transformer reduces commercial power high voltage to low voltage; the voltage stabilizing circuit provides a stable direct-current power supply for the sampling and control circuit; the sampling circuit is used for conditioning the AC voltage and outputting a feedback signal; and the control circuit performs mode analysis by utilizing a pre-judgment algorithm according to the feedback signal so as to control the on-off circuit to cut off the mains supply input or switch the output mode of the constant current and voltage stabilizing circuit. Through an intelligent protection mechanism comprising sampling, control and on-off circuits, the device can be suitable for single-phase electric equipment, and quick and accurate response to abnormal high voltage is realized. And the transformer is adopted for voltage conversion and isolation, and the surge protection circuit and the on-off circuit are combined, so that the protection performance is ensured, and the overall cost and size of the system are effectively controlled.

The utility model provides a refrigerant filling machine to solve the problem that in the prior art, a large amount of manpower and time cost are consumed for achieving high-precision filling. The refrigerant filling machine comprises a booster pump, a storage tank, an electronic scale, a control system, a filling pipeline, a pressure sensor, a roller and a storage chip. The refrigerant filling machine is excellent in cost control, traditional complex assemblies are abandoned, the booster pump and the high-precision online electronic scale are combined, and the manufacturing, debugging and maintaining cost is reduced. The electronic scale monitors the weight in real time, the control system performs comparison operation, and the error of the filling amount is controlled within five thousandths. The whole filling process is automatically executed by a control system, and an operator only needs to simply set parameters and start operation to complete a refrigerant filling task. The outer wall of the storage tank is connected with an external power supply through the leakage protector, the power supply is automatically cut off during leakage, and the alarm sends out a signal during abnormity.

The invention belongs to the field of fuses, and provides an intelligent fuse which comprises a conductor used for bearing main loop current; the fuse body is connected in the conductor in series and can be fused when the current of the main loop exceeds a preset threshold value; a first cutting unit configured to cut off the melt based on an external trigger signal; and a second cutting unit configured to cut off the conductor based on an internal trigger signal, where the internal trigger signal is a voltage signal across the melt. The intelligent fuse solves the technical problems that an intelligent fuse in the prior art is complex in structure and high in cost, and is low in cost, small in size, simple in structure and easy to operate.

The invention belongs to the technical field of power supply and distribution of a data center, and provides an electrical protection method and system for power supply and distribution of the data center, aiming at the data center of a 2N power distribution architecture, electric energy parameters of two paths of external mains supply are collected and transmitted to an EMS of an energy storage system, and system charging and discharging power is controlled and adjusted through the EMS. According to the fact that the sum of the power on the two alternating current buses is larger than a set protection threshold value, the first switch device is controlled to cut off the connection between the energy storage system and the second alternating current bus, overload of a superior line or a transformer during charging or power supply switching is prevented, and in addition, through the measures of a reverse power detection device, first-path voltage loss linkage and the like, the energy storage system can be effectively protected. An external electrical protection system independent of the energy storage system is added to form dual protection, so that a dual fault superposition scene of energy storage system faults or power grid faults is effectively isolated, and the reliability of an originally designed power supply network of the data center is guaranteed.

The invention relates to the field of high-voltage ring main units, in particular to a high-voltage ring main unit with an internal protection device, which comprises an internal installation part, an installation slot position used for installing an electrical assembly in the internal installation part needs to be formed by a precise numerical control machining technology manufactured by power electronic components, and three groups of external expansion parts are arranged in the internal installation part. Two groups of mounting parts are arranged in the internal mounting part, two groups of opposite breaking parts are arranged in each of the two groups of mounting parts, internal adjusting parts are arranged in each of the two groups of mounting parts, a telescopic rod of a control cylinder extends outwards to drive a clamping block to move upwards, a plug is separated from a through hole of a locking side block, and locking is released; the displacement ejector block moves under the action of the spring, so that the blocking insertion plate is pushed through the inclined plane, the blocking insertion plate is inserted between the guide push blocks, the two guide push blocks in contact are separated, and conductive connection of the electrical components in the two sub-loading cavities is cut off.

The invention relates to the technical field of electric energy metering, in particular to a high-precision voltage and current synchronous metering system of an alternating current and direct current integrated standard electric energy meter, which is characterized in that a hysteresis analysis module and an eddy current analysis module are used for respectively analyzing current signals to obtain a hysteresis intensity factor and an eddy current loss factor of the electric energy meter; a time scale weight and an instantaneous energy loss proportion are introduced through a hysteresis and eddy current coupling module, a comprehensive loss factor of an eddy current effect and a hysteresis effect is analyzed, self-adaptive distribution of weights of the eddy current effect and the hysteresis effect is realized, and primary compensation is performed on a current signal; the temperature compensation module analyzes the influence of the temperature on the electric energy meter, and performs temperature compensation on the voltage signal and the current signal. The system can effectively cope with complex dynamic working conditions, guarantees the temperature stability of measurement, cuts off the transmission and accumulation paths of errors from the source, improves the metering precision under AC / DC mixed signals, and guarantees the interpretability and reliability of the system.

The invention discloses a battery cluster short circuit rapid identification method and device based on voltage sag. The method comprises the following steps: acquiring a total voltage real-time value of a battery cluster in a current detection period; calculating an inter-frame total voltage change real-time value of the battery cluster based on the total voltage historical value of the battery cluster in the previous detection period; judging whether the inter-frame total voltage change real-time value is greater than or equal to a preset voltage abrupt change threshold value or not; and if yes, judging that the battery cluster has a short-circuit fault, and triggering a protection action. The inter-frame change of the total voltage of the battery cluster is monitored in real time and compared with the preset threshold value, millisecond-level rapid identification and protection of the full-range short-circuit current are achieved, and the technical problem that in an existing energy storage system protection system, due to the inverse time limit characteristic of a circuit breaker and the BMS delay criterion, medium and low short-circuit current cannot be rapidly cut off is effectively solved.

The embodiment of the invention provides a multi-power-domain power management method, a power management system and electronic equipment, and relates to the technical field of power consumption management. The method is applied to a power supply normally open domain of the power supply management system, the power supply management system further comprises a main low dropout linear regulator, a plurality of power supply domains, a power supply switch array and an analog domain, the main low dropout linear regulator and the analog domain are connected with an external power supply, and the main low dropout linear regulator is connected with the power supply domains through the power supply switch array. The analog domain comprises a high-speed clock; the method comprises the following steps: in response to a standby mode entering instruction, sending a first control signal to an analog domain to turn off a high-speed clock; sending a group of second control signals to the power switch array to cut off power supply to at least one target power domain; and sending a third control signal to the main low-dropout linear voltage regulator to regulate the main low-dropout linear voltage regulator to enter a low-power-consumption working mode Therefore, the time for entering the low-power-consumption mode can be reduced.

The invention discloses semiconductor equipment and an exhaust pipeline maintenance method. The maintenance method comprises the steps that a target pipe section and a non-target pipe section are defined on an exhaust pipeline; the target pipe section is at a first temperature, and the non-target pipe section and the process cavity are at a second temperature lower than the first temperature, so that a temperature gradient is formed between the target pipe section and the non-target pipe section and between the target pipe section and the process cavity; coating gas is introduced into the exhaust pipeline through the bottom in the process cavity and the exhaust port, the inner wall of the target pipe section is selectively coated with a coating through the temperature gradient, and meanwhile coating of the coating on the inner wall of the process cavity and the inner wall of the non-target pipe section is restrained. Under the condition that the equipment is not disassembled, a high-corrosion-resistance coating is only formed on the area, needing to be protected, of the exhaust pipeline of the equipment, a pollution source is cut off, and therefore the effects of pipeline corrosion prevention, pollutant attachment and the like are achieved to the maximum extent, and efficiency is improved.

The invention provides a particle accelerator beam pipeline support member design method and a support system, and relates to the technical field of particle accelerators, and the particle accelerator beam pipeline support member design method comprises the following steps: classifying devices on a beam transport line into interference source devices and sensitive devices based on the electromagnetic characteristics of the devices and the structural relationship between the devices and a beam pipeline; supporting pieces are independently configured for a beam pipeline and various devices, and specific electrical isolation, grounding and filtering measures are adopted for different device types: an interference source device is connected with an electrostatic protection ground and is added with a filter; sensitive equipment and a beam pipeline are electrically isolated and are connected with a signal ground. Through systematic supporting and grounding architecture design, a coupling path of electromagnetic interference is fundamentally cut off, electromagnetic noise on a beam pipeline is remarkably reduced, a clean reference ground is provided for beam diagnosis and other weak signal systems, and high-reliability and high-precision operation of an accelerator is guaranteed.

The invention provides a time-delay-free voltage sag method and equipment, and relates to the technical field of intelligent control. When voltage sag is caused by a power grid side fault, an energy storage device automatically injects current into a power grid side through an electric reactor, voltage drop is formed on the electric reactor, and stability of load side voltage is guaranteed; during treatment, the main control device CCU monitors the duration of voltage drop of the power grid; and if the duration exceeds a preset time-delay constant value, a continuous fault is determined, a control signal is output immediately, a power grid side switch S1 of each energy storage unit is tripped off, current injection to the fault power grid is cut off, and at the moment, the load is independently supported by the energy storage device T. According to the invention, when slight voltage sag occurs at the power grid side, the load does not need to be cut off from the power grid, and real non-delay treatment is realized.

An electric circuit breaker device includes: an igniter provided to a housing; a projectile disposed in an accommodating space formed in the housing, the projectile being configured to be projected along the accommodating space by energy received from the igniter; a conductor piece forming a portion of an electric circuit, and includes a cutoff portion crossing the accommodating space and configured to be cut off by the projectile that moves by the energy received from the igniter; a coolant material disposed in an arc-extinguishing region and positioned within the accommodating space while opposing the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile; and a resin material disposed in the accommodating space and configured to be modified by heat associated with actuation of the igniter.

The invention discloses a laser cutting machine tool security early warning system based on multi-parameter analysis, which relates to the technical field of laser cutting equipment and comprises a front-end sensing layer, a core processing layer and an early warning distribution layer, the front-end differential conditioning circuit is matched with the electric-optical-electric optical fiber transmission link, a high-frequency radiation path of the laser generator and the servo motor is cut off in a physical layer, millisecond-level real-time stripping of dynamic electromagnetic noise is achieved, the problem of weak sensing signal distortion is fundamentally solved, and the detection precision is improved. And meanwhile, the characteristic frequency of the servo motor is stripped in combination with variational mode decomposition, so that the reconstructed monitoring signal has an extremely high signal-to-noise ratio, the crossing from simple early warning to intelligent diagnosis is realized through collaborative analysis of current, vibration and optical data, the risk of mistaken shutdown caused by interference is greatly reduced, the machining continuity is guaranteed, and the working efficiency is improved. And the data transmission delay is greatly reduced, and the security of the equipment is protected to the greatest extent in cooperation with the multi-stage synchronous notification of the early warning distribution layer.

An electric circuit breaker device includes: an igniter provided to a housing; a projectile disposed in an accommodating space formed in the housing, the projectile being to be projected along the accommodating space by energy received from the igniter; a conductor piece that is provided to the housing, forms a portion of an electric circuit, includes in a portion thereof a cutoff portion to be cut off by the projectile, and is disposed with the cutoff portion crossing the accommodating space; an arc-extinguishing region positioned on a side opposite to the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile; a first coolant material disposed in the arc-extinguishing region; and a second coolant material disposed between the projectile and the cutoff portion in the accommodating space prior to actuation of the igniter.

This method diagnoses whether a circuit breaker wire is effective while the relay is disconnected, without actually connecting the relay. [Solution] In a vehicle power supply system comprising a relay attached to the battery side of the smoothing capacitor of the power line, a driver that drives the relay, a first control unit, a second control unit that receives a command from the first control unit and outputs a drive signal to the driver, and a cutoff wire that the first control unit uses to directly cut off the relay in priority to the drive signal from the second control unit to the driver, the first control unit, when terminating the system, outputs a command to cut off the relay to the second control unit, diagnoses whether the relay is welded based on whether or not there is a voltage drop in the smoothing capacitor, sets the cutoff wire to the cutoff side and outputs a command to connect the relay to the second control unit, and monitors the output status of the driver to diagnose whether or not the cutoff wire is effective.

This invention provides a circuit emergency protection device for high-voltage switchgear, belonging to the technical field of circuit emergency protection equipment. The device includes a switchgear body, an internal mounting frame, a leakage current protection mechanism mounted on the top of the mounting frame, an inspection light mounted on the top of the switchgear body, a temperature sensor mounted inside the switchgear body, a cooling mechanism mounted at the bottom of the switchgear body, a ventilation mechanism mounted on the top of the switchgear body, and a leakage current protector mounted on the top of the mounting frame. The leakage current protector contains a magnetic ring, with a copper wire sleeved on its outer wall. A connecting wire is attached to the top of the copper wire, and the top of the connecting wire is connected to a circuit board. This invention can quickly detect abnormal current and cut off the power supply, providing more direct protection for operators. By monitoring leakage current, it can cut off the power supply before a fire hazard occurs, significantly reducing the risk.

A laser apparatus (121), an emission module (120), a lidar (100), and a terminal device, relating to the technical field of lidars. By means of providing laser emitting circuits (1211_1 to 1211_n) and switches (S1, S2, S3) in the laser apparatus (121), lasers (D1_1 to D1_n) in the laser emitting circuits (1211_1 to 1211_n) can be controlled to emit light. Furthermore, when the laser apparatus (121) is in a failure scenario, the switches (S1, S2, S3) can be controlled to cut off paths between a power supply (HV) and first capacitors (C1_1 to C1_n), such that the power supply (HV) is prevented from continuing to charge the first capacitors (C1_1 to C1_n) in the laser emitting circuits (1211_1 to 1211_n), thereby effectively dispersing energy in an internal capacitor (C0) of the power supply (HV) and the first capacitors (C1_1 to C1_n), reducing the light-emitting duration of the lasers (D1_1 to D1_n), and accordingly reducing the risk of the emission power and radiation intensity of laser pulse signals emitted by the lasers (D1_1 to D1_n) exceeding the AEL values required for human eye safety.