840 results about "Multimeter" patented technology

The invention relates to the technical field of power detection, and discloses a power energy storage detection device and a detection method thereof.The power energy storage detection device comprises a conveying shell, a motor is fixedly connected to one side of the outer wall of the conveying shell, a rotating shaft is fixedly connected to the output end of the motor, and one end of the rotating shaft penetrates through the conveying shell and extends into the conveying shell; a transverse rod is rotationally connected to one side of the inner wall of the conveying shell, rotating rollers are fixedly connected to the outer wall of the rotating shaft and the outer wall of the transverse rod, electronic elements are placed on the top of the conveying belt, the motor is started, the motor drives the rotating shaft to rotate, the rotating shaft drives the rotating rollers to rotate, and the rotating rollers drive the conveying belt to rotate; and when the electronic components are conveyed to the bottom of the top frame, the motor is closed, the electric telescopic rod is started, the electric telescopic rod drives the transverse plate to descend, the transverse plate drives the universal meter to descend, the universal meter makes contact with the electronic components in the descending process, and then the electronic components are detected.

The invention relates to an anti-electricity-stealing monitoring method and device based on an intelligent universal meter, equipment and a medium. The method comprises the following steps: acquiring real-time electric sampling data of a universal meter, and preprocessing the data to obtain electric characteristic data; carrying out electricity stealing feature extraction on the electricity feature data by utilizing an edge electricity stealing detection model, and carrying out preliminary judgment on an electricity utilization type to obtain a preliminary judgment result; if the preliminary judgment result is at least one of an electricity larceny event and reverse feed, using a cloud electricity larceny detection model to perform secondary analysis on the electricity characteristic data to obtain an abnormal probability; and if the abnormal probability exceeds a preset threshold, generating a corresponding alarm work order, and pushing the alarm work order to a supervision platform. By adopting the method, the field acquisition capability of the intelligent multimeter can be fully combined, the local and cloud computing characteristics are combined, and the recognition and monitoring of electricity stealing behaviors such as low-current electricity stealing and reverse feed are effectively enhanced through a multi-source feature extraction and judgment mechanism.

The invention discloses a computer power-on detection device, and belongs to the technical field of computer detection, the computer power-on detection device comprises a rack, a conveyor belt is fixedly mounted on the rack, a righting assembly and a detection assembly are arranged above the conveyor belt, the detection assembly comprises a multimeter and a contact piece, the back surface of the rack is fixedly connected with a support frame and a support plate, and the support plate is fixedly connected with the support frame. The centralizing assembly moves up and down along the supporting frame, an electric push rod is fixedly connected to the top of the supporting plate, the output end of the electric push rod is fixedly connected with a universal meter, and a probe of the universal meter is fixedly connected with a contact piece. According to the technical scheme, accurate butt joint of the detection assembly and the computer is guaranteed, the detection assembly can conduct continuous detection operation on a plurality of righting computer materials, the continuity of detection work is effectively improved, and therefore the technical effect of improving the detection precision and the detection work efficiency is facilitated.

The invention relates to the technical field of diode detection, in particular to a vehicle gauge level diode detection method, which comprises the following steps of: acquiring a plurality of pieces of image information of each view of a diode to construct a spatial model of the diode, and determining the qualification of the spatial form of diode packaging based on the overall fitting degree of the spatial model. And determining the diode packaging qualification based on the straight line contact ratio of the pins. Carrying out preliminary detection by using a universal meter based on the packaged qualified diode, and determining the minimum dynamic resistance based on the volt-ampere characteristic curve of the diode under the condition that the access is qualified so as to carry out preliminary grading on the performance of the diode; and the detection voltage is matched based on the preliminary grading result, the temperature of the diode is monitored in real time in the detection process to establish a temperature fluctuation curve, and the maximum change rate and the change range of the temperature are determined based on the temperature fluctuation curve to determine whether the fluctuation evaluation value is adjusted to re-determine the performance grading of the diode. According to the invention, the performance detection efficiency of the diode is improved.

The utility model relates to the technical field of power transmission and distribution control equipment detection, in particular to a power transmission and distribution control equipment detection device, which comprises a universal meter main body, a display screen is arranged at one end of the surface of the universal meter main body, and a plurality of uniformly distributed sockets are arranged in the middle of the surface of the universal meter main body; a collection mechanism which can quickly collect and arrange meter wires and improve the use effect of the device and is arranged at one end of the universal meter main body; by arranging the collecting mechanism and the storage assembly, two collecting rollers can rotate to take up and pay off inspection lines, the using effect of the device is improved, the inspection lines can be rapidly stored and arranged through the arrangement of the two collecting rollers, and the inspection lines can be prevented from being damaged when not in use; and through arrangement of a collecting roller, the knotting phenomenon of the inspection line in the using process can be reduced, the device is convenient to use, a fixing groove can store a connecting block, the meter line can be rapidly stored and arranged, and the using effect of the device is improved.

The invention discloses a testing device for an aircraft automatic throttle switch package assembly, which comprises a box body and a mounting frame mounted on the inner side of the box body, an operation panel is mounted at the top of the mounting frame, and a storage box is arranged at the left lower part of the mounting frame. A storage box cabin cover corresponding to the storage box is hinged to the top of the operation panel, and two test mounting folding frames are mounted on the storage box cabin cover; the testing device can be used for testing the automatic accelerator switch package assembly of the aircraft, is small in size, convenient to carry, safe, reliable and simple to operate, can be used for testing nine switches at the same time, is clear at a glance in testing state, and can be used for testing whether the switches are synchronous or not at the same time. And a digital multimeter can be externally connected to measure the contact resistance in each switch, so that the fault judgment accuracy of aircraft maintenance personnel and the precise adjustment of assembly correction are effectively improved, the maintenance quality and attendance rate of an aircraft are improved, and the maintenance cost is greatly reduced.

The invention discloses a system and method for detecting the accuracy of a bushing end screen current sensor, and belongs to the technical field of sensor performance detection. The system comprises a test loop and a power frequency magnetic field generator, the test loop comprises a multifunctional electrical measuring instrument calibrating device, a standard digital multimeter and a terminal acquisition and display device, and a bushing end screen current sensor to be tested is connected in series between the standard digital multimeter and the terminal acquisition and display device. And determining the accuracy of the bushing end screen current sensor to be detected according to the amplitude and the phase angle difference of the equivalent current. According to the invention, power frequency magnetic field interference suffered by the bushing end screen current sensor can be simulated, and the accuracy of the sensor under the power frequency magnetic field interference can be accurately measured.

An integrated rapid correction device for formation and capacity grading equipment comprises an upper computer which is connected with a switch through the Ethernet. The switch is in signal connection with a to-be-calibrated device and a plurality of independent working devices; the calibration unit is connected with the equipment to be calibrated through a voltage and current line and a wireless signal to achieve an equipment calibration effect; the calibration unit comprises a calibration main processor, an FPGA (Field Programmable Gate Array) coprocessor, a signal relay plate, a universal meter and a voltage and current connecting plate, and works through an external power supply; the test port of the universal meter is electrically connected with the calibration port of the to-be-calibrated device. The calibration main processor comprises a precision calibration circuit for adjusting measurement and output precision, a line sequence calibration circuit for ensuring signal synchronism and time sequence, and a coaxiality calibration circuit for ensuring coaxial cable signal accuracy; according to the utility model, the precision calibration circuit and the coaxiality calibration circuit are greatly improved on the basis of the utility model with the publication number of 115166614A, and the sensitivity of detecting the contact state of the probe, the accuracy of precision calibration and the energy utilization efficiency are improved.

The utility model discloses a brushless motor Hall plate detection device, which comprises a test board and a Hall plate arranged at the top of the test board, and is characterized in that the side edge of the test board is provided with a press-down driving mechanism, and the press-down driving mechanism is provided with a display control mechanism; the output end of the pressing driving mechanism is provided with a test piece, and the test piece can be in contact with the detection point under the driving of the pressing driving mechanism; the test piece can be driven by the pressing driving mechanism to do reciprocating motion, and the motion direction of the test piece points to the detection point; according to the utility model, through the arrangement of the downward pressing driving mechanism, the test piece can be driven to move downwards horizontally, so that the test contact of the test piece can be in stable contact with the detection point of the Hall plate, thereby replacing the operation of manually connecting the universal meter with the Hall plate by detection personnel, greatly reducing the labor intensity of the detection personnel, and improving the detection efficiency.

The invention relates to the technical field of battery pack evaluation, and discloses an echelon utilization power battery evaluation method, which comprises the following steps: performing appearance and smell inspection, and screening batteries without damage, liquid leakage and peculiar smell; safety performance tests are sequentially carried out, and the safety performance tests comprise insulation tests, voltage-withstanding tests and elimination of unqualified batteries; performing dynamic environment simulation, performing health state detection through room-temperature and high-low-temperature charging and discharging, rate testing and internal resistance analysis, and evaluating residual capacity and consistency; a high-precision universal meter is adopted for voltage consistency evaluation, the resolution ratio is 0.1 mV, and the measurement error is smaller than or equal to + / -0.5 mV; the temperature consistency is detected by a distributed temperature sensor, the precision is + / -0.5 DEG C, and the sampling interval is less than or equal to 2s; bMS function verification is carried out, and SOC estimation and voltage / current measurement precision are calibrated; and integrating the detection data, and generating a battery health state report and echelon utilization suggestions. The detection efficiency and safety are improved, the resource utilization rate is maximized, and the cost is reduced.

The invention discloses a TBOX offline detection system, and relates to the technical field of offline detection. The feedback states of the five groups of indicator lamps are controlled through an ECU, namely, a light 3 is lightened after binding succeeds, a light 5 is lightened after remote shutdown, a light t1 is lightened after first-stage vehicle locking and 2V is displayed by a universal meter, and a light t1 and a light t2 are lightened after second-stage vehicle locking and 0V is displayed; the 279 ECU simulates a vehicle control unit, virtual vehicle number binding and unbinding are input through the cloud platform, and a relay is controlled to switch a power supply. When a vehicle is searched, the buzzer responds, and the rack integrates all the modules to realize physical connection and operation. The detection includes connection initialization, function detection, fault simulation and data storage, and efficiency and accuracy are improved. According to the invention, the detection efficiency is improved through the fast-plug wire harness and an automatic instruction, and the time consumed by a single machine is shortened to 15 minutes or less; errors are reduced through voltage simulation and acousto-optic feedback, and the fault omission ratio is reduced; the real-time evidence storage of the cloud platform ensures the data traceability, supports multi-dimensional retrieval and report generation, solves the problems of low efficiency, large error and difficult traceability of the traditional scheme, and improves the detection reliability and standardization level.

The invention discloses a metal material electrochemical polishing optimization method and system based on an LSV curve, and relates to the technical field of electrochemical polishing, an electrochemical polishing system and equipment are configured, and the system comprises an electrochemical polishing tank, a high-power power supply with a scanning function and a high-precision universal meter for receiving trigger signals; setting an external trigger signal, and determining a measuring range, an acquisition speed, a cycle index and trigger edge selection. According to the invention, the LSV curve is accurately monitored, the current limiting platform area is identified, the constancy of the current value in a certain potential range is reflected by using the stability index of the current limiting platform area, the width of the current limiting platform area is measured by using the width index of the current limiting platform area, and the current size index is analyzed to observe the size of the current limiting. The polishing parameters are automatically adjusted according to the indexes of stability, width and current magnitude, it is ensured that the optimal conditions are kept all the time in the polishing process, and therefore the high-precision and consistent polishing effect is achieved.

The utility model provides a reverse breakdown voltage tester and testing equipment. The reverse breakdown voltage tester comprises a voltage input module, a current control module and a measuring module, the measuring module is connected with the voltage input module and the current control module. One end of the tested transistor is respectively connected with the voltage input module and the current control module; and the other end of the measured transistor is connected with the measuring module. In the mode, the universal meter and the variable resistor are connected in series to form the current control module, so that the reverse breakdown voltage test cost of the transistor is reduced.

The utility model relates to the field of electric power maintenance toolboxes, in particular to a portable electric power maintenance toolbox. Comprising a box body, the inner wall of the box body is fixedly connected with a storage bin, the inner wall of the storage bin is provided with a limiting device, the limiting device comprises two fixing plates, the two fixing plates are fixedly connected with the storage bin, the upper surfaces of the fixing plates are fixedly connected with adjusting plates, and the inner walls of the adjusting plates are slidably connected with sliding blocks; a top plate is fixedly connected to one side of the sliding block, and a spring is fixedly connected to the lower surface of the top plate. The portable electric power maintenance tool box has the advantages that when a user places a universal meter in the storage bin, the limiting device can limit the universal meter in the storage bin, the situation that the universal meter collides with the box body when the user carries the box body to move is avoided, and the use safety of the user is improved. And the limiting device can protect the universal meter.

The automatic test system comprises a primary direct current source, an industrial personal computer, a tested power supply, an electronic load and a universal meter, the tested power supply is the programmable power supply, the primary direct current source is connected with the input end of the tested power supply and used for supplying power to the tested power supply, and the output end of the tested power supply is connected with the electronic load and used for supplying power to the electronic load. The universal meter is connected to the output end of the tested power supply and is used for measuring the output voltage of the tested power supply; the primary direct current source, the tested power supply, the electronic load and the universal meter are respectively connected with the industrial personal computer, and the industrial personal computer realizes control and data backward reading of the tested power supply, the electronic load, the universal meter and the primary direct current source through a communication interface. Compared with a manual test method, the automatic test system provided by the invention can realize automatic test by controlling the primary source, the electronic load, the programmable power supply and the universal meter only by setting up a test environment by a tester, so that the test efficiency is improved, and the labor cost is reduced at the same time.

The invention belongs to the field of tapping machine fault early warning, and particularly relates to a tapping machine fault early warning mechanism and early warning method for battery cabinet machining, which comprises a tapping machine, a tapping machine brake system, a workbench, a fixing module, a gravitation early warning module, a tightening module, a counting early warning module, a pressing module and a power connection detection module, the fixing module is used for keeping the tapping machine stable during power-on detection; the gravitation early warning module is used for displaying the distance that the assembly is pulled by gravitation generated by the drilling and tapping brake coil and the brake clutch plate when the tapping machine is powered on; the tightening module is used for limiting the position of the drilling and tapping brake back plate without preventing the drilling and tapping brake back plate from rotating; the counting early warning module is used for counting the number of rotation turns of the end not passing through the brake system and the end passing through the brake system. The pressing module is used for temporarily fixing the detached brake coil to be tested; and the electric connection detection module is used for detecting whether the inner wall coil of the brake coil to be detected is in good access or not and whether the insulation effect of the insulation coating is perfect or not by using a universal meter.

The utility model discloses a battery cell performance test and electric quantity automatic equalization tool, which comprises a charging and discharging device, a digital multimeter and a bottom plate, the charging and discharging device is electrically connected with the digital multimeter, and the bottom plate is connected with a first fixing plate and a second fixing plate which are oppositely arranged. A limiting plate for fixing the battery cell is arranged between the fixing plate I and the fixing plate II on the bottom plate; the first fixing plate is connected with a sliding rod, the end, away from the limiting plate, of the sliding rod is connected with a push-pull clamp, the end, close to the limiting plate, of the sliding rod is connected with a first pole piece, the side, facing the limiting plate, of the second fixing plate is connected with a second pole piece, and the first pole piece and the second pole piece are connected with charging and discharging equipment and a digital multimeter through connecting wire harnesses respectively. The bottom plate is provided with a supporting plate used for being connected with and supporting the push-pull type clamp. According to the utility model, the rapid, reliable and safe connection between the battery cell and the test equipment can be realized, multiple types of battery cells can be compatible, the voltage can be automatically detected, and the electric quantity required to be balanced can be calculated for electric quantity balancing.

The invention discloses a ring-down light cavity precision pressure control method and device based on enhanced data-driven PID, and the method comprises the steps: 1) building a ring-down light cavity pressure control device, and integrating a pressure sensor, a proportional valve, a digital multimeter, a DC power supply, a vacuum pump and other key parts; 2) acquiring a proportional valve driving voltage and a pressure feedback signal based on LabVIEW, and constructing a discrete time ARX model of the system; (3) on the basis of the model residual error and the real-time error, an enhanced data driving algorithm is adopted to carry out online self-adaptive updating on PID parameters; 4) filtering high-frequency noise by using a second-order Bessel low-pass filter to improve the signal stability; and 5) realizing closed-loop control under the LabVIEW platform, and monitoring and maintaining the operation performance of the system in real time. The method has the advantages of model self-learning, parameter self-tuning, high robustness, high control precision and the like, is particularly suitable for scenes such as high-precision spectral measurement with extremely high requirements on pressure stability, and has remarkable engineering practical value and popularization and application prospects.

The utility model provides a battery effectiveness detection device for a new energy automobile, which belongs to the technical field of battery detection and comprises a universal meter main body, two connecting wires are mounted on the rear side of the universal meter main body, and detection probes are mounted at the tail ends of the two connecting wires; the universal meter comprises a universal meter main body, the rear surface of the universal meter main body is provided with a storage disc, the storage disc is provided with a spiral storage groove, the rear surface of the universal meter main body at one side of the storage disc is provided with a positioning assembly, the positioning assembly comprises a lower combination frame and an upper combination frame, and a through groove hole is formed between the lower combination frame and the upper combination frame. According to the device, two connecting wires can be combined and regularly wound in the storage groove through the storage glue and the limiting disc, and a detection probe area can be limited and fixed through the positioning assembly, so that the connecting wires can be stably wound on the limiting disc, and the connecting wires of the universal meter can be conveniently arranged and stored; and the effectiveness of the battery of the new energy automobile can be conveniently detected through a universal meter subsequently.

The automatic testing device comprises a verification mother board, a verification daughter board, a program control direct current power supply, a digital multimeter, an angle simulation instrument, a signal generator and an upper computer, and the upper computer is provided with upper computer software of the automatic testing device for the synchronous-to-digital converter. Power input, reference input voltage and angle synchronous input signals needed by the synchronous-digital converter are provided, and normal work of the two-channel synchronous-digital converter is achieved. Synchronous conversion angle signals and reference voltage are input through the angle simulation instrument, the converter outputs corresponding binary bit angle digital signals, and the controller collects the corresponding angle digital signals, converts the angle digital signals into angles and transmits the angles to the upper computer through a serial port. And the high and low levels output by the synchronous-digital converter are measured by the digital multimeter and then are transmitted to the upper computer. And finally, the upper computer judges whether the standard is reached or not. Test indexes comprise shaft angle conversion, resolution, output high level, output low level and the like.

The invention belongs to the technical field of avionics detection, and particularly provides a rapid fault detection system and method for an avionics equipment transmitter, and the system comprises an electronic equipment detection system, an auxiliary device, an oscilloscope, a frequency spectrograph, a digital multimeter, a high-voltage probe and a current clamp which are connected through a cable. And a ground wire of the auxiliary device is connected with the avionics equipment. According to the invention, fault detection and positioning of components can be carried out by means of a complete machine to which the transmitter belongs without splitting a product to be tested, particularly, fault components are determined under the condition that the high voltage is applied to the transmitter, after various instructions, excitation signals and power supply troubleshooting confirmation are carried out, various functional loops are detected on line, and a special klystron is designed to replace a load. And finally, one-time fault positioning is realized, so that the fault positioning efficiency of the product is improved, and continuous power-on startup verification is reduced.

The invention discloses a multifunctional automatic aging system and method, and the system comprises a multi-parameter measurement module, an integrated oscilloscope, a universal meter and a temperature sensor, and is used for measuring the output voltage ripple, the output voltage value, the output current value and the surface temperature of an aging module in real time; the data comparison and judgment unit is used for automatically comparing the real-time measurement data of the multi-parameter measurement module with a preset standard value, recording unqualified data and identifying the corresponding aging module; the abnormity monitoring and processing unit is used for monitoring over-temperature, over-current and overload abnormal states in the aging process in real time, triggering alarm and executing preset processing operation; the database module is used for storing all test data and supporting production process tracking and problem tracing based on the stored data; the report generation module is used for automatically screening test data according to customer requirements and generating a standardized test report; and the control software unit is provided with modules for setting aging time, selecting models of products to be tested, configuring test functions, reporting templates and the like.

The invention discloses an automatic test system for detecting an IO port on an MCU controller, and particularly relates to the technical field of automatic test and hardware-in-the-loop verification, the system takes a TSMaster as an upper computer, a programmable power supply, a digital multimeter and a controllable relay matrix are combined, and input injection, output measurement and controlled power supply disturbance are realized through a CAN / Ethernet / SCPI. The system comprises an input injection and channel switching module, an output drive and high-resistance isolation module, a power supply disturbance and alarm verification module, a unified acquisition and self-calibration compensation module, a criterion evaluation / report module, a regression module and the like, completes alignment and online small signal calibration and crosstalk compensation under a unified time base, constructs a minimum evidence unit, and implements interval criterion and time sequence robustness evaluation. And outputting an auditing report and triggering regression scheduling to realize high coverage of IO port functions and boundary working conditions and repeatable verification.

The utility model relates to the technical field of automatic testing of sensors, and discloses an automatic testing mechanism of a current sensor, which comprises a deck plate, a testing assembly is mounted on the deck plate, and a pressure head and a probe assembly are arranged at the top of the testing assembly. According to the utility model, the test assembly and the pressure head and probe assembly are arranged on the countertop and work together, so that parameters of the current sensor can be automatically tested, and the current sensor parameter testing device has the advantages of simple operation, high test efficiency, high precision, high automation degree, good safety, reliable result, simple mechanism, low equipment cost, convenience and rapidness, and the like. Therefore, the trouble that multiple sets of equipment such as a digital oscilloscope, a program-controlled voltage-stabilized source and a desk-type digital multimeter are needed to test each current sensor in the traditional mode is avoided, the time is effectively saved, and the labor cost is greatly reduced.

The invention discloses a multi-channel automatic calibration tool, and relates to the technical field of equipment calibration, and the tool comprises a middle computer, a plurality of calibration plates, a switching plate, a universal meter reading switching plate, and a universal meter. The calibration plates and the switching plate are connected with the middle computer. The universal meter reading switching plate and the universal meter are connected with the switching plate. Each calibration plate is connected with the multimeter reading switching plate; each calibration board corresponds to a channel of a mainboard of the battery detection equipment, and the middle computer sends a channel switching instruction to the switching board; the switching board controls gating of the corresponding calibration board according to the channel switching instruction; after gating the corresponding calibration board, the middle computer sends a test instruction to the gated calibration board; the multimeter reading switching board switches the test data acquired from the gated calibration boards into the multimeter one by one for reading; the switching board also uploads the test data read by the universal meter and the physical addresses corresponding to the test data to the middle computer. The detection efficiency of the battery detection equipment can be improved.

Provided is a method for the simultaneous determination of parameters, in particular of at least two, three or four parameters, of at least one resin layer applied to at least one carrier material by recording and evaluating at least one NIR spectrum in a wavelength range between 500 nm and 2500 nm, preferably between 700 nm and 2000 nm, more preferably between 900 nm and 1700 nm, and particularly advantageously between 1450 nm and 1550 nm, using at least one NIR measuring head, in particular at least one NIR multimeter head.

The invention discloses a terahertz detector linearity calibration device and method. The terahertz detector linearity calibration device comprises a terahertz radiation source, a monitoring detector, a baffle, a terahertz film attenuator, a diaphragm, a standard terahertz detector, a digital multimeter, a computer and measurement and control software. The terahertz radiation source is used for radiating parallel or divergent terahertz wave beams; the monitoring detector is used for monitoring the fluctuation condition of the terahertz radiation source; the baffle plate is used for being inserted into a terahertz light path when the noise of the detector is detected so as to play a role in cutting off the terahertz light path; the terahertz thin film attenuator is used for carrying out quantitative attenuation on terahertz power without changing the transmission state of a wave beam; the digital multimeter is used for measuring an electric signal output by the detected terahertz detector, and the electric signal is collected by the computer and sent to the data processing software, and then the linearity is calculated according to the linearity. According to the invention, the interference of the attenuator on beam transmission characteristics can be effectively reduced, so that the calibration precision is improved.

The utility model discloses a photodiode dark current testing device, comprising an LED lamp, a light shield, a dual-channel power supply, a desk type universal meter, a one-chip microcomputer control board and a multi-channel test board, the light shield is covered on the multi-channel test board, the multi-channel test board is provided with PD sockets having the same number as the channels of the multi-channel test board, and the PD sockets are connected with the desk type universal meter. The PD socket is composed of a 4P socket and Y-shaped sockets arranged side by side. After the scheme is adopted, the efficiency is greatly improved through multi-channel testing, and the vertical pins can be automatically tested through the design of the Y-shaped socket.

The invention discloses a digital multimeter with an anti-misoperation function, which comprises a shell, and is characterized in that the interior of the shell is of a hollow structure, an anti-skid patch is fixedly connected to one side of the shell, a threaded column is fixedly connected to the bottom of the inner wall of the shell, a circuit module is fixedly connected to the top of the threaded column, and the anti-skid patch is fixedly connected to the bottom of the inner wall of the shell. The top of the circuit module is fixedly connected with a first needle seat and a second needle seat, one side of the inner wall of the shell is fixedly connected with a heater, the top of the circuit module is fixedly connected with an electromagnetic circuit breaker, the electromagnetic circuit breaker comprises a rear contact plate, the bottom of the rear contact plate is fixedly connected with the first needle seat, and the bottom of the rear contact plate is fixedly connected with the second needle seat. According to the universal meter, the possibility that the universal meter slips in a low-temperature and humid environment is reduced, the situation that the circuit module is touched by mistake due to short circuit or the circuit module is damaged due to the fact that the circuit module is stained with water is reduced, and the reliability and the safety of equipment are improved.

The invention discloses a testing device for a PCB (Printed Circuit Board). The testing device comprises a testing box body, a testing jig, a testing instrument and a control upper computer, a simulation battery module, a logic control module, an intermediate relay module, a reference BMS module and a power supply are arranged in the test box body; the simulation battery module outputs multiple paths of adjustable cell voltages for sampling of a PCB to be tested, the logic control module receives an instruction of an upper computer to control a test process, the intermediate relay module realizes signal switching and on-off control, the reference BMS module provides function parameter comparison, and the test instrument comprises an electronic load and a universal meter. The device is used for detecting parameters such as discharge performance, voltage and current. The test fixture is fixed and connected with a to-be-tested PCB, the contact port assembly can be replaced to adapt to different models, and the code scanning gun inputs test information and triggers a process. The device has the functions of multi-path voltage simulation, automatic signal switching and data acquisition and tracing, is modularized in structure and high in adaptability and expansibility, and can improve the batch detection efficiency and precision.