503results about How to "Addressing Structural Complexity" patented technology

The invention is applicable to the technical field of switching power supplies, and provides a switching power supply and a multi-threshold switching circuit thereof. The multi-threshold switching circuit is characterized in that a sampling voltage judgment module is used for dividing voltage outputted by a power supply circuit, comparing the voltage with a first reference voltage, a second reference voltage and a third reference voltage outputted by a reference voltage generating module and outputting corresponding control signals to a voltage-controlled oscillation module according to comparison results; the voltage-controlled oscillation module is used for generating pulse signals with specific duty ratio according to a fourth reference voltage and a fifth reference voltage which are outputted by the reference voltage generating module and the control signals; and a power switch is used for high-frequency on-off switching with a corresponding frequency according to the pulse signals to enable a transformer to perform storage and release of electricity energy correspondingly, so that output voltage of the transformer is periodically modulated to achieve stable contact voltage output. The switching power supply is further simplified structurally by the aid of the multi-threshold switching circuit, and cost is reduced.

The invention discloses a spring-ring type inserting hole and an inserting needle thereof, wherein a ring-shaped slot with a U-shaped cross section is arranged on the inner wall of an inserting-needle hole, a spiral spring ring is arranged in the ring-shaped slot, the inside diameter of the spiral spring ring is smaller than the aperture of the inserting-needle hole, the height of the spiral spring ring is consistent with the width of the ring-shaped slot, and a spiral spring forming the spiral spring ring is an oblique spring; and arc-shaped slots surrounding the outer circumferential surface of an inserting-needle head are arranged on the inserting-needle head which is adapted to the inserting hole, and the quantity and the positions of the arc-shaped slots are adapted to the ring-shaped slot in the inserting-needle hole. Through the spring-ring type inserting hole and the inserting needle of the spring-ring type inserting hole, the problem that a connector in the prior art difficultly meets the requirement of a large-current working condition is effectively solved, and the spring-ring type inserting hole and the inserting needle of the spring-ring type inserting hole disclosed by the invention have large contact areas, small sizes and simple structures, are connector parts with bran-new structures and have high practical value.

The invention discloses a control device for a microminiature turbojet engine and a starting control method thereof. The device comprises a rotating speed sensor for collecting the rotating speed of an engine, a temperature sensor for collecting exhaust temperature, a switch controller, a throttle controller, an electronic control unit (ECU) and an executing mechanism, wherein the executing mechanism comprises a starting motor, a hot piston, a propane gas valve, a fuel protective valve and a fuel gear pump. The control method comprises the following steps: the ECU monitors the working state of the engine through the sensor, and outputs a pulse-width modulation signal to a power drive circuit to control the starting motor, the hot piston, the propane gas valve, the fuel protective valve and the fuel gear pump so as to complete starting control to the engine; functions of establishing fuel pressure and adjusting fuel quantity can be realized by the fuel gear pump after starting of the engine is completed; and fuel can be accurately supplied to ensure that the engine operates in an expected working state. The device can be used for a microminiature delivery vehicle, and the executing mechanism of the device has the advantages of simple structure, small volume and light weight, and easily realization of reliable and efficient control to the engine.

The invention discloses an annular optical filer wheel which comprises an optical filter unit, an optical filter wheel disc unit, a main supporting structure unit, a top flange unit, a driving mechanism unit and the like. The optical filter unit divides an optical system into eight imaging detection channels, namely, a red light channel, a green light channel, a blue light channel, a near-infrared channel, a panchromatic channel, a 0-degree polarized light channel, a 45-degree polarized light channel and a 90-degree polarized light channel. The annular optical filer wheel has the advantages of being capable of achieving multi-channel filtering, detecting different areas respectively at the same time and being rotated fast. After the annular optical filter wheel rotates by one circle, multi-spectral and polarization detection of each target area is finished. The annular optical filer wheel is particularly suitable for design of the filter wheels of optical systems of large diameters, large focal lengths and annular view fields.

The invention discloses a fuel battery-based emergency power generation vehicle. The vehicle comprises a vehicle body and is characterized in that: a hydrogen supply module, a fuel battery system, a high-power boost DC / DC converter, a DC / AC inverter and a distribution box are arranged on the vehicle body and electrically connected in turn; a secondary battery pack is connected between the high-power boost DC / DC converter and the DC / AC inverter through a low-power bidirectional DC / DC converter which is connected in parallel with the high-power boost DC / DC converter and the DC / AC inverter; a start-stop switch module, a 24V DC / DC converter and the input end of a 12V DC / DC converter are also connected in parallel between the low-power bidirectional DC / DC converter and the secondary battery pack; the start-stop switch module is connected with a control panel; the 24V DC / DC converter and the output end of the 12V DC / DC converter are connected with a monitoring module respectively; and the monitoring module is also connected with the hydrogen supply module, the fuel battery system, the high-power boost DC / DC converter and the start-stop switch module respectively. The fuel battery-based emergency power generation vehicle has the advantages of simple structure, convenient use and capacity of effectively solving the problems of high noise, easy environmental pollution and the like in the prior art by using hydrogen energy sources.

This invention relates to rigidity and charging extension plane frame supportive structure, which solves the current solar sailboard and plane antenna plane frame supportive structure mechanic extension and complex existence structure and bad reliability and low efficiency of folding. The frame rack is loaded with frame rack longitude baseboard, wherein, the baseboard and frame rack is connected through band; the baseboard upper end has sticking layer; the wire left end is fixed on frame rack supportive tube and is connected to supportive tube with electricity layer; the charging channel left end is fixed inside supportive tube with control valve.

The invention provides a focusing method and system, and relates to the technical field of focusing. The method comprises the following steps that: projection equipment controls a driving device to perform focusing operations in sequence according to a first preset step length, and projects a pre-stored identification picture under different focal distances to generate projection pictures; terminal equipment acquires a projection picture corresponding to a current focal distance before performing a next focusing operation under the action of the driving device, and calculates the definition of the projection picture; the terminal equipment generates a focusing stopping instruction when the definition of the projection picture acquired at the current focal distance is smaller than the definitions of projection pictures corresponding to previous N adjacent focal distances; and the projection equipment controls the driving device to stop the focusing operations according to the focusing stopping instruction. Through the method, the problem of incapability of automatically and accurately focusing in the absence of an image acquisition device in the projection equipment in the prior art can be solved, so that the problems of complex structure and high manufacturing cost due to the need of specially arranging the image acquisition device are solved.

The invention provides a 3D printer head for solving the problems that the 3D printer head in the prior art has a complex structure, is easy to cause material blockage and leakage and has poor cooling effect. The 3D printer head comprises an extruding part, a ventilation part, a heating part and a line outgoing part, wherein the line outgoing part comprises a fixed base and a line bank, the line bank is arranged at the rear end of the fixed base, and the extruding part, a ventilation part and the heating part are all arranged on the fixed base; the ventilation part adopts an interior-drafting type axial fan, air blown by the interior-drafting type axial fan is enabled to flow into a stepping motor at the extruding part, so as to lower the temperature of the stepping motor, ensure the stepping motor to work normally and prolong the life of the stepping motor; besides, downward airflows can directly cool the 3D printer head during printing, use of double fans is avoided; the design of the ventilating channel can effectively reduce the volume and the weight of the 3D printer head.

The intelligence valve electrically controlled installment belongs uses the sensor monitor and the micro electron technology control valves uses the electrically operated installment. The main characteristic is: In the mechanism which has has partially established the non- electronic contact type examination output shaft torque value the strength value sensor and the examination valve operates the electro-optical sensor, in the electric motor supposes the temperature sensor; Its electric control are partial is the modular microcomputer control system, in is equipped with AVR high speed to insert the type monolithic integrated circuit the controller module, receives various sensors the monitor signal to control the power control module after processing, then control motor active status. This invention solved the traditional technology to plant the structure complex, security bad, difficult problem and so on reliability, this equipment was the light integration of machinery high tech product, its structure simple, security good, precision high, the reliability was high, could to the valve entire work process realization automatic monitor and the monitoring.

The invention relates to a strain tower with a shape like a Chinese character 'gan' of a compact transmission line, comprising tower legs (8), a tower body (7), a tower head (13), a conducting wire strain string (11), a common jumper suspension string (9) and a united jumper suspension string (10), wherein a second conducting wire strain string (11-2) is connected with an upper-phase jumper suspension wire clamp (10-3) of the interphase united jumper string (10) by a second jumper (12-2), and a third conducting wire strain string (11-3) is connected with a lower-phase jumper suspension wire clamp (10-7) of the interphase united jumper string (10) by a third jumper (12-3). The invention has simple structure, increases the earth height of the lower-phase jumper, solves the detects of higher calling height, complicated structure and high self cost of the traditional compact type strain tower structure and reduces tree felling and earth and rock extraction. The compact ultra-high-voltage transmission line has more advanced technology, is more reasonable in economy and more environment-friendly in ecology.

The invention discloses a snake-like amphibious robot provided with modular joints. The robot comprises multiple universal modules which are connected in series end to end, one of two adjacent universal modules which are movably connected can have pitching motion or / and yawing motion relative to the other universal module, and the first universal module and the last universal module of the snake-like amphibious robot are provided with a cylindrical head protective case and a cone-like tail protective case respectively. The snake-like amphibious robot provided with the modular joints has the advantages of flexible action, simple structure, low cost, reliable and stable performance and the like which existing products do not have.

The invention discloses a pulse condition tester. The pulse condition tester comprises a first probe, a second probe, a third probe and a support. The first probe, the second probe and the third probe are sequentially arranged in parallel, are the same in structure, and all comprise casing pipes, air bags and sensors. The air bags and the sensors are all matched and accommodated in the casing pipes, and the air bags are clamped between the casing pipes and the sensors and used for conducting inflation and deflation to drive the sensors to slide in the casing pipes. A first sliding chute and a second sliding chute are formed in the surface of the support in a penetrating mode, the first probe is connected into the first sliding chute in a sliding mode, the second probe is connected into the second sliding chute in a sliding mode, and the third probe is fixedly connected to the support. According to the pulse condition tester, the first probe and the second probe can be manually adjusted, and the pulse condition tester can more easily align with inch, bar and cubit acupuncture points. The pulse condition tester is simple in structure, convenient to operate, maintain and assemble, small in size, easy to wear, low in cost, and high in universality, and pulses can be taken for multiple crowds.

The invention relates to dialyzing paper winding equipment which comprises a bottom plate. Two mounting supports are arranged on the right side of the bottom plate; the two mounting supports are connected with the bottom plate; two transmission mechanisms are mounted between the two mounting supports; the transmission mechanisms comprise driven rotary drums and driving rotary drums, and the driven rotary drums are connected with the driving rotary drums by conveyor belts; two V-shaped belt pulleys are respectively mounted at the front ends of the two driving rotary drums; the two V-shaped belt pulleys connected with each other by a V belt; a support plate is welded on the right side of the bottom plate; a first driving motor is mounted on the support plate; the first driving motor is connected with the driving rotary drums; a first fixing plate is welded on the bottom plate; two V-shaped tension mechanisms are symmetrically welded on the first fixing plate; each V-shaped tension mechanism comprises three tension shafts; a double-winding device is welded on the left side of the upper end surface of the bottom plate. The dialyzing paper winding equipment has a bidirectional dialyzing paper winding function on the premise of low cost, and has the advantages of low cost, easiness and convenience in operation, high work efficiency, wide application range and the like.

The invention pertains to the technical field of complementary metal-oxide semiconductors, which discloses a complementary metal-oxide semiconductor monolithic integrated peak value detection circuit, comprising: a peak value point seeking circuit which is used for generating a rising edge signal at the time of inputting the peak value point of a sine wave signal A; a peak value point discharge circuit which is used for generating a discharge waveform signal E at the site of inputting the peak value point of the sine wave signal; a digital logic, a digital frequency division signal G and a digital waveform signal F are used for controlling the counting of time intervals of an external clock input I, thus generating a digital output signal H of the characteristic time intervals. The circuit of the invention only carries out the sampling of the peak value point, thus simplifying the requirements on a sampling circuit. The peak value detection circuit utilizes the voltage-time conversion (or voltage-duty ratio conversion); the circuit resolution of the invention is controlled by the frequency of a counting clock, thus being much higher than the resolution of the ordinary analog-to-digital converter with the same digital number. The peak value detection circuit can reduce the volume power consumption and meet the needs of the integration of a sensor and the circuits.

The invention discloses an automatic feeding and discharging machining device of a numerically-controlled machine tool. The automatic feeding and discharging machining device of the numerically-controlled machine tool comprises a mounting rack; working spindle assemblies, a working platform and a horizontal movement assembly are disposed on the mounting rack; positioning jigs are arranged on the working platform; glass lifting assemblies are mounted on the horizontal movement assembly; rotary assemblies are disposed on the glass lifting assemblies; glass sucker devices are disposed on the rotary assemblies. The automatic feeding and discharging machining device further comprises a glass feeding rack and a glass discharging rack, and the glass feeding rack and the glass discharging rack are used for placing to-be-machined glass and machined glass respectively. The automatic feeding and discharging machining device of the numerically-controlled machine tool has the advantages of high work efficiency, convenient installation and maintenance, high quality stability of machined products and the like which existing equipment cannot achieve.

An automatic classification type garbage can comprises a garbage outer barrel, a garbage classification scanner, an inner storage barrel, a locating device, a rotating push-conveying mechanism, a controller and a power supply, wherein the inner storage barrel, the locating device, the rotating push-conveying mechanism, the power supply and the controller are arranged in an inner cavity of the garbage outer barrel; the bottom of the locating device is in detachable connection with the inner storage barrel; the power output end of the locating device is connected with the driving end of a rotating pushing mechanism arranged at the top of the inner storage barrel; the signal output end of the garbage classification scanner is electrically connected with the signal input end of the controller, and the control end of the locating device and the control end of the rotating push-conveying mechanism are separately and electrically connected with the signal output end of the controller; and the power transmission end of the garbage classification scanner, the power transmission end of the locating device and the power transmission end of the controller are separately electrically connected with the corresponding power supply ends of the power supply. The automatic classification type garbage can has the beneficial effect that the problems that the classification type garbage can is high in cost, complicated in structure and difficult to repair are solved, manual operation is not needed, and the garbage classification work of a user is reduced.

The invention relates to a speckle eliminating device, in particular to a follow-up distributed perturbation screen secondary speckle eliminating device, and solves a series of problems, such as serious optical loss, complex structure and high cost, of the conventional device for eliminating secondary speckles on a screen. The follow-up distributed perturbation screen secondary speckle eliminating device comprises a screen 101, wherein a vibration excitation source 103 with periodic or random vibration is arranged in the center of the screen 101, or a plurality of vibration excitation sources 103 with periodic or random vibration are uniformly distributed at the periphery or within the area of the screen 101; and the amplitude A of vibration of the vibration excitation source 103 during random vibration is greater than or equal to 0.05 mm, or the frequency f of the vibration excitation source 103 during periodic vibration is greater than or equal to 10 Hz and the amplitude A of vibration of the vibration excitation source 103 during periodic vibration is greater than or equal to 0.05 mm. The follow-up distributed perturbation screen secondary speckle eliminating device is reasonably designed and has a simple structure.

The invention is suitable for the field of charge control, and provides a charger and an over-current protection circuit thereof. The over-current protection circuit comprising a sampling resistor R1, a reference voltage generating unit, a voltage comparing unit and a feedback control unit is arranged in the charger, and the circuit is simple in structure and low in cost; when the short circuit over-current phenomenon occurs in the output end of the charger, feedback voltage in a Boost circuit of the charger can be adjusted rapidly so that the Boost circuit can adjust output currents of the charger according to the feedback voltage, therefore, over-current protection of the charger is achieved, and the charger is prevented from being damaged.

The invention discloses a flexible robot variable stiffness joint, comprising a main motor module, an intermediate cam roller module, a stiffness adjusting module and a measuring system. An output flange II in the main motor module is fixedly connected with a spline shaft in the intermediate cam roller module, and torque of the main motor module is transmitted to the intermediate cam roller module. A cam roller module includes an upper cam disk, the upper cam disk can slide axially and roll circumferentially on the spline shaft; a mold spring is arranged between the upper cam disk and the flange in the main motor module; the upper cam disk compresses the mold spring to change the torque of the upper cam disk; The lower cam disk is fixedly connected to the output flange I in the stiffness adjustment module.

The invention discloses an electric precipitator and a cathode ray thereof. The cathode ray comprises a metal pipe, wherein the metal pipe is connected with a power supply so as to form an electric field with an anode pipe of the electric precipitator under the current action; the cathode ray also comprises at least one nozzle; each nozzle is arranged on the peripheral wall of the metal pipe and is communicated with the metal pipe; and one end of the metal pipe is communicated with a high-pressure water source, and the other end of the metal pipe is plugged. When the cathode ray is in a cleaning mode, high-pressure water is sprayed to the anode pipe by virtue of the nozzle, the metal pipe and discharge metal wire of the cathode ray are cleaned by utilizing the pressure of the spraying water and bounce force of the water column. Compared with the prior art, the electric precipitator has the advantages that after the cathode ray structure is adopted, a complex spraying pipeline net does not need to be arranged above the electric field, only a primary pipe needs to be connected into each electric field, the structural parts inside the equipment are simplified, the construction cost of the equipment is reduced, a self-spraying mode is formed inside the electric field, the cathode rays and anode pipes in the electric field are sprayed and cleaned one by one, the spraying coverage rate is 100 percent, and the electric field cleaning effect is enhanced.

The invention discloses an anti-collision transfer box for ceramic tiles. The anti-collision transfer box comprises a bottom plate, wherein the two sides of the top of the bottom plate are fixedly connected with supporting rods; the top ends of the supporting rods are fixedly connected with slide plates; a movable plate is in sliding connection between the two slide plates; the middle part of thetop of the movable plate is fixedly connected with a box body through a base; the middle part of the bottom of the inner cavity of the box body is fixedly connected with a fixed rod; the top end of the fixed rod is fixedly connected with the top of the inner cavity of the box body; the middle parts of the two sides of the fixed rod are fixedly connected with mobile plates; and one side of each mobile plate is fixedly connected with the inner wall of the box body. The invention relates to the technical field of ceramic tile transfer. According to the anti-collision transfer box for the ceramictiles disclosed by the invention, the two sides of the top of the bottom plate are fixedly connected with the supporting rods, so that the ceramic tiles can be stably transferred, are especially stable during transfer, are not liable to shake, and not liable to have position changes, and therefore, the problem that an existing anti-collision transfer box for the ceramic tiles does not have stability is solved.

The invention provides an automatic component insertion machine. The automatic component insertion machine comprises a material supplying apparatus, a material conveying apparatus, a PCB conveying apparatus and a component insertion mechanical arm apparatus; the material conveying apparatus is provided with a capturing station for allowing the component insertion mechanical arm apparatus to capture a material; the material conveying apparatus is connected to the tail end of the material supplying apparatus; the PCB conveying apparatus is provided with an operation region for allowing the component insertion mechanical arm apparatus to perform material insertion and connection, and is used for conveying the PCB; the PCB conveying apparatus is arranged on one side, back to the material supplying apparatus, of the capturing station; the PCB conveying apparatus comprises a PCB conveying mechanism and a PCB fixing driving mechanism; the component insertion mechanical arm apparatus is used for performing material insertion and connection on the PCB; and the component insertion mechanical arm apparatus is arranged above the PCB conveying apparatus. By virtue of the setting of the material supplying apparatus, the material conveying apparatus, the component insertion mechanical arm apparatus and the PCB conveying apparatus, the structure of the automatic component insertion machine is simplified, the cost is lowered and working efficiency is improved.

The invention discloses an ultrasonic treating device and an achieving method of the ultrasonic treating device. The ultrasonic treating device comprises a power supply module, a control module, a display module, a drive signal generating module, a plurality of driving modules and a plurality of ultrasonic transducers. The power supply module is respectively connected with the display module, the control module, the drive signal generating module and the driving modules; the display module, the control module, the drive signal generating module, the driving module and the ultrasonic transducers are successively connected; the driving modules and the ultrasonic transducers are correspondingly connected; the control module controls treating time, controls the power supply module to adjust output power, and controls the drive signal generating module to generate primary drive signals which are corresponding in frequency, duty ratio, pulse repetition period and coding type; a device overall structure adopts a micro-programmed control unit (MCU)+field programmable gate array (FPGA) framework theory; the modularized design achieves many adjustable parameters, wide range, much transducer depth focusing treating of the treating ultrasonic waves, and meets requirements of clinical treating and experimental research.

The invention relates to a double-winding device for a dialyzing paper winding device. The double-winding device comprises a base plate. A fixing plate is welded to the base plate. Two winding branched chains are installed on the upper side and the lower side of the fixing plate through bearings. The winding branched chains comprise step shafts, installing sleeves are arranged on the outer sides of the middles of the step shafts, two sides of the step shafts are sleeved with two limiting shaft barrels respectively, and the upper end and the lower end of each limiting shaft barrel are connected with an upper strip-shaped groove and a lower strip-shaped groove of the corresponding step shaft through two limiting screws respectively. A supporting disc is arranged on the two step shafts through bearings respectively. Two transmission gears are arranged at the tail ends of the two step shafts through keys respectively. An idle pulley is meshed between the two transmission gears and installed on a fixing shaft through a ball bearing. The fixing shaft is welded to the middle of the supporting disc. A drive motor is installed at the left ends of the step shafts through a coupler. The two-direction winding function of dialyzing paper can be achieved on the premise that cost is low, and the double-winding device has the advantages of being low in cost, easy and convenient to operate, high in working efficiency, wide in application range and the like.

The invention relates to a reconstructable multi-legged robot which is formed by a plurality of leg units and connection plates. Any two leg units are connected through the corresponding connection plates to achieve multi-legged robots of different types. Regarding each leg unit of the reconstructable multi-legged robot, a single motor drives leg rods on the two sides to achieve the alternative walking action. When the reconstructable multi-legged robot walks, multiple leg rods support the robot on the ground at any moments so as to ensure the stability of the robot. Marching, retreating and turning of the robot are achieved by controlling the rotating speeds and rotating directions of the motors of different leg units. The reconstructable multi-legged robot is simple in structure, easy to control, and high in movement stability, adaptability to different environments and practical value in the fields of military, exploration, entertainment and the like.

The invention discloses a head-up display and a display control method. The head-up display comprises a display module and a reflecting layer, wherein the display module comprises a light modulation layer, the light modulation layer is arranged along a laser propagation direction and used for alternately modulating the propagation direction of laser so as to enable the laser to have two differentpropagation directions after passing through the light modulation layer and be projected to a reflective display; the reflective display is used for alternately generating a first image and a second image and projecting the first image and the second image to a reflective imaging layer; the reflective imaging layer is used for respectively performing reflective imaging on the first image and second image which are reflected by the reflective display; and the reflecting layer is used for reflecting the imaged first image and second image so as to be received by the human eyes, so that an observer can observe two independent images. According to the scheme provided by the embodiment of the invention, the light modulation layer divides the light source into two paths of light with different propagation directions and projects the two paths of light to the reflective display device so as to form two images, and the reflective imaging layer behind is matched to achieve double-layer display.

The invention belongs to the field of electronic lighting and provides an LED driving circuit and an LED lamp. The LED driving circuit which is composed of an electromagnetic compatibility (EMC) filtering unit, a first rectifying and filtering unit, a voltage reduction unit, a voltage transformation unit, a constant-current output unit, a pulse-width modulation (PWM) control unit, a switching unit, a second rectifying and filtering unit, a voltage supply unit, an output stage voltage comparison unit, a load current tracing unit and a secondary feedback unit is used for providing a constant current for an LED load at an output stage, and the circuit is simple in structure, low in cost and capable of improving the electrical efficiency, so that the problems that output current of existing LED driving circuits cannot be kept stable for a long term and the existing circuit is complex in structure and high in cost can be solved.

The invention discloses an adjustable type electromagnetic damping vibration absorption boring bar, and belongs to the field of mechanical machining. The problems that an existing vibration absorptionboring bar based on a damping device is prone to failing, or complex in structure and large in manufacturing difficulty are solved. The vibration absorption boring bar is characterized in that corresponding relation tables of process parameter combinations and optimal exciting current are preset in a master controller, each process parameter combination comprises rotating speed, the feeding amount, the back cutting depth amount, the workpiece material and boring cutter geometric parameters, the electromagnetic damping device is motivated by the optimal exciting current to enable the radial vibration of a bar body under the corresponding process parameter combination to be minimum, and the master controller searches the process parameter combination closest to the input actual process parameter combination and the corresponding optimal exciting current from the corresponding relation table before the vibration absorption boring bar is used for boring and machining, the master controller is further used for controlling an excitation current source to carry out excitation on an electromagnetic damping device when the vibration absorption boring bar is used for boring, and the electromagnetic damping device is motivated by the optimal exciting current to carry out vibration absorption on the bar body.

The present invention discloses an insulation detection device with integrated multiple functions. The device comprises: a main controller, a power circuit, a high-voltage switching unit, an insulation detection circuit, a voltage and current sampling circuit, a metering chip, a built-in bleeder resistor, a bleeder control circuit, a LCD / LED display, a clock circuit, an EEPROM, a key, a battery circuit, a 485 communication circuit and a CAN communication circuit. A direct current bus between a charging module and a main relay of a charging pile and a PE line are accessed into the high-voltageswitching unit, and insulation state detection is performed by the insulation detection circuit; and the direct current bus of the charging pile after outputting the main relay is accessed into the voltage and current sampling circuit, and electric energy metering, battery voltage measurement and charging current measurement can be performed by employing the metering chip. The device provided by the invention can solve the problems that the internal structure of the charging pile is complex and the cost is high, so that the circuit integrates a direct current metering function, a bleeder function, a battery voltage detection function and an insulation detection function, and a battery optimization performance is completed.