418results about "Base element modifications" patented technology

Systems and Methods for capacitance testing of a unit under test with parasitic capacitance directed to a guard rail. The system includes test points, wherein the plurality of test points are divided into at least two groups; a stimulus source; a first group guard relay electrically connected to each of the test points in a first; a second group guard relay electrically connected to each of the test points in a second; a guard rail coupled to the first group guard relay and the second group guard relay; a first group return relay electrically connected to each of the test points in a first group; a second group return relay electrically connected to each of the test points in a second group; a current measurement rail coupled to the first group return relay and the second group return relay; a current meter coupled to the measurement rail; and a controller.

The invention relates to the technical field of charge and discharge detection, and discloses a multichannel EIS charge and discharge in-situ test system and method, and the system comprises a DC charge and discharge module which is used for carrying out the constant-current, constant-voltage or cyclic charge and discharge test of a battery; the alternating current impedance test module is connected in parallel with the direct current charging and discharging module and is used for applying an alternating current disturbance signal to the battery and collecting impedance response in the charging and discharging process; and the unified clock module is used for providing a synchronous triggering reference signal for the direct current charging and discharging module and the alternating current impedance test module. The direct current charging and discharging module and the alternating current impedance test module are designed to be of a parallel connection normally-connected structure, no relay switching is needed, continuous and uninterrupted online EIS test in the charging and discharging process is achieved, contact resistance drift and transient errors caused by physical circuit switching in a traditional scheme are effectively avoided, and the reliability of the EIS test is improved. And the stability and repeatability of the test are obviously improved.

The invention relates to a development type single-phase earth fault real-model test device and a control method, the development type single-phase earth fault real-model test device is connected in a whole power grid and comprises a fault intelligent generation module, and the fault intelligent generation module comprises a dynamic resistance simulation unit and an intelligent switching control system. And the intelligent switching control system is used for controlling the access resistance value and the access time of the resistor in the dynamic resistance simulation unit. The dynamic resistance simulation unit structure is of a three-level resistance topology and is combined with a mixed switching matrix of a vacuum relay and a solid-state relay. The intelligent switching control system is used for realizing the switching of the resistor at a current zero crossing point, the intelligent switching control system comprises a low-power-consumption control circuit and a signal acquisition circuit, the structure is matched with the control method, the continuous or step dynamic change of the grounding resistor can be accurately simulated, the problem of transient impact in the resistor switching process is solved, and the stability of the grounding resistor is improved. And a standardized and quantifiable test platform is provided for performance assessment of power distribution network fault handling equipment.

The invention, which relates to the technical field of phased-array antenna testing, discloses an automatic phased-array testing system comprising a vector network analysis module, an antenna horn and servo control module, a phased-array antenna module, a testing tool module and an upper computer control module. The invention also discloses a phased array automatic test method. The method comprises the following steps: preparing before testing; configuring test parameters; executing an automatic test; processing and storing test data; and finishing the test and resetting the equipment. Full-process automatic testing is achieved through the upper computer automation unit, traditional testing time is shortened, large-scale phased array batch testing is adapted, personal errors are eliminated through the testing tool, the vector network module and the servo module, data credibility is improved, operation is simplified, data are automatically stored, a report is generated, modular design is adapted to multiple types of phased arrays, and testing efficiency is improved. And the cost is reduced, the application is wide, and better use prospects are brought.

This invention discloses a short-circuit and resistance detection device, comprising a circuit board assembly electrically connected to a rectangular connector. The circuit board assembly includes an MCU, which is electrically connected to a power supply unit, a switching unit, and a detection unit. The switching unit includes a short-circuit detection switch unit, a short-circuit detection interrupt switch unit, a resistance detection switch unit, and a resistance detection interrupt switch unit. The detection unit includes a short-circuit detection unit and a resistance detection unit. The MCU includes several PA pins and several PC pins. The PA pins include PA0 pins and PAn pins, and the PC pins include PCi pins; n=1…n, i=0…i. This invention can simultaneously detect whether any signal is short-circuited to multiple other signals, can detect the resistance of multiple products, reduces personnel requirements, improves product detection accuracy, and shortens detection time. This invention also discloses a detection method for the short-circuit and resistance detection device.

The present application relates to the technical field of circuit, in particular to a non-mechanical touch button detection circuit and method.The non-mechanical touch button detection circuit provided by the present application comprises a plurality of external IO channels for connecting external sensors, a detection circuit main body comprising a plurality of function detection channels, at least including a capacitance detection channel and a pressure detection channel, and a programmable analog array switch configured to selectively switch any one or more of the external IO channels to the corresponding one or more function detection channels based on different detection modes, to realize multiplexing or combination of capacitance detection function, pressure detection function or capacitance and pressure fusion detection function.The present application realizes deep fusion and flexible reconstruction of capacitance detection and pressure detection through the programmable analog array switch, realizes automatic adaptation and time division multiplexing of a single chip to multiple detection modes, and improves the versatility, reliability and environmental adaptability of the touch button.

The application discloses a kind of digital primary-secondary fusion pole-mounted circuit breaker and its travelling wave ranging time method. The circuit breaker includes feeder terminal and transformer digitizing unit, the feeder terminal is connected with satellite synchronous clock, and the feeder terminal and transformer digitizing unit are connected by cable to realize the uplink communication connection from the feeder terminal to the transformer digitizing unit. In the application, the feeder terminal periodically and uniformly sends data frame to the transformer digitizing unit based on second pulse signal, the transformer digitizing unit obtains time stamp synchronized with second pulse signal based on the received data frame, and obtains travelling wave data with time stamp, thereby improving the accuracy of ranging.

A battery cell inspection apparatus according to the present invention may comprise: a frame; an assembly loading member which is mounted on the frame so as to be liftable / lowerable, and on which a cell tray assembly is loaded; a lifting / lowering driving means mounted on the frame so as to lift / lower the assembly loading member; an inspection jig which is disposed above the assembly loading member within the frame, and which comes into contact with a battery cell so as to measure the voltage of the battery cell; and a stopping member which is disposed above the assembly loading member, and which has at least two stopping surfaces formed at different heights. The lifting height of the assembly loading member can be adjusted through selective contact of a portion of the assembly loading member with the stopping surfaces.

An integrated circuit (100A) includes an H-bridge circuit (102) having a first output node (OUT1) for coupling to the high-side terminal of an inductor (103) and a second output node (OUT2) for coupling to the low-side terminal of the inductor. A current-sensing FET (SNS-DRV) is coupled between a current source (110) and a lower supply voltage to provide a reference current (Itrip), including a peak current limit at the sensing node. A current-sensing comparator (104) has a first input coupled to the sensing node, a second input coupled to the second output node, and an output (113) coupled to send an output signal to a driver control circuit. A FET linearity detection circuit (112) is coupled to receive the gate voltage (LS2) of an active low-side power FET (Mls2) and has an output (CMP EN) coupled to enable the current-sensing comparator when the active low-side power FET operates in the linear region.

The application relates to the field of artificial network control, in particular to an artificial network control method, device and system for shielding across a darkroom. By using a fiber link and an internal battery power supply architecture in a fully-closed shielding darkroom, the interference of personnel on a test environment is completely eliminated, monitoring of parameters such as internal temperature and voltage of the integrated darkroom is added, zero-crossing synchronization noiseless operation of phase switching is realized, in addition, user end environment adaptive identification, driving parameter dynamic calibration and equipment life prediction are realized, and the needs of high-precision, unattended automatic phase switching and testing are met.

A tool module (14) for grounding and short-circuiting a conductor of a high- or medium-voltage system by means of at least one terminal (18), wherein the tool module (14) has a connection interface (26) via which the terminal (18) can be connected. The tool module (14) has a wireless communication unit (56) which is configured to detect at least one terminal parameter associated with the terminal (18). Depending on the at least one terminal parameter detected via the communication unit (56), the tool module (14) is configured to block or enable the connection interface (26).

The invention provides a surface mount filter temperature characteristic testing device, which belongs to the technical field of electronic component testing and comprises an in-box testing unit and a main control and data acquisition system. The in-box test unit comprises a multi-station test fixture system, a high and low temperature control system and an automatic switch switching system; the multi-station test fixture system comprises a PCB circular plate; the automatic switch switching system comprises a signal input interface, a signal output interface, an upper layer radio frequency switch and a lower layer radio frequency switch. And the master control and data acquisition system is in communication connection with the high and low temperature control system. According to the integrated PCB test module, the multiple radio frequency switches and the transmission lines with the same length, the uncertainty and loss of radio frequency paths are reduced to the maximum extent, and the consistency and accuracy of test data are ensured. The invention further discloses a testing method of the surface mount filter temperature characteristic testing device.

Certain aspects relate to systems and usage techniques for modular lateral flow assay reader devices that can receive a number of different modules having a barcode scanning input device and optional network connectivity capabilities. A barcode scanning module can provide a simple input method that reduces errors compared to manual data entry. A network connectivity module can enable transmission of test results over a public network for standardizing, tracking and electronically connecting test results from assay reader devices located throughout a network. Such devices can programmatically implement a simplified workflow whereby pressing a single button readies the device for imaging, analyzing, and data storage / transmission and, in some implementations, configures the device to operate in one of a plurality of device operation modes.

The utility model discloses an insulation detection circuit and device based on unbalanced bridge mode, insulation detection circuit includes power, upper bridge arm, lower bridge arm and the first switch of connecting between upper bridge arm and lower bridge arm, one end of upper bridge arm is connected with the positive pole of power, one end of lower bridge arm is connected with the negative pole of power, and upper bridge arm includes first resistance to be measured, second switch and first voltage dividing resistance, and lower bridge arm includes second resistance to be measured, third switch and third voltage dividing resistance. The efficient, stable, sensitive insulation detection scheme based on unbalanced electric bridge mode of the application can monitor the insulation state of electrical equipment under complex environment in real time, and through effective signal processing, the safety and reliability of equipment are improved.

The invention discloses a flywheel energy storage offline dynamic test system and test method based on compressed air energy storage. A flywheel energy storage unit is used for executing charging and discharging operation under the simulated power grid working condition and receiving a dynamic performance test; the compressed air energy storage unit is used for providing the power supply / absorption capability of the simulated power grid for the flywheel energy storage unit in the test process; the energy management and cooperative control unit is used for cooperatively controlling energy flow between the compressed air energy storage unit and the flywheel energy storage unit according to a preset long-time-history complex dynamic power grid working condition curve; the data acquisition and analysis unit is used for acquiring operation parameters of the flywheel energy storage unit and the compressed air energy storage unit in real time and feeding back abnormal conditions recognized in real time in the testing process to the energy management and cooperative control unit; the compressed air energy storage unit serves as a controllable power supply / load, performance evaluation and optimization of the flywheel energy storage unit under the simulated complex power grid working condition are achieved, and the function of flexible switching of grid-connected / off-grid modes is achieved.

The utility model discloses a miniature electronic load instrument applied to production, which comprises an instrument body, one end of the instrument body is provided with a to-be-tested switching power supply connecting port, the instrument body is provided with a liquid crystal display screen and a plurality of function keys, and the function keys comprise a start key, a setting key, a + key and a-key. A main control board is arranged in the instrument body, the main control board comprises a single chip microcomputer, a to-be-tested switching power supply connecting port, a liquid crystal display screen, a start key, a setting key, a + key and a-key are electrically connected with the main control board, and the to-be-tested switching power supply connecting port, the single chip microcomputer, the liquid crystal display screen, the start key, the setting key, the + key and the-key form a main control circuit. According to the utility model, the conventional professional equipment is replaced, the cost of instruments, equipment and materials is greatly reduced, the parameter adjustment of a test experiment product can be quickly responded, and meanwhile, various test parameters of the test product can be intuitively observed through the 1602 liquid crystal on the surface, so that the use is convenient.

The invention relates to a power semiconductor module having a power current path (17) in which a shunt resistor (1), in particular a resistor less than or equal to 50 milliohms, is arranged, the shunt resistor (1) having two mutually spaced main measuring contacts (2, 3) of different polarities (+,-) and an auxiliary measuring contact (4) being arranged immediately adjacent to the shunt resistor (1), the auxiliary measuring contacts are not directly electrically connected to the shunt resistor, and wherein a measuring line (20, 21, 22) leads from each measuring contact (2, 3, 4) to the evaluation unit (6) and forms a loop (18, 19) having an approximately identical area.

This invention discloses an insulation resistance detection method and system, relating to the field of battery testing technology. The method includes: after disconnecting a first switching switch, a second switching switch, and a grounding switch, acquiring a first voltage of a first resistor and calculating the total voltage of the battery pack; after closing the grounding switch and the first switching switch, and after disconnecting the second switching switch, acquiring a second voltage of the first resistor and calculating a first positive voltage to ground and a first negative voltage to ground; after closing the grounding switch and the second switching switch, and after disconnecting the first switching switch, acquiring a third voltage of the first resistor and calculating a second positive voltage to ground and a second negative voltage to ground; and calculating the insulation resistance between the positive terminal and ground of the battery pack and the insulation resistance between the negative terminal and ground of the battery pack. This invention enables insulation resistance detection through switching operations using a series-connected switching arm and a fixed arm, improving detection accuracy and reliability while reducing costs.

The invention relates to the technical field of power semiconductor wafer testing, and discloses a power semiconductor wafer electrical parameter testing system and method, and the system comprises a dynamic testing device which is electrically connected with a wafer bearing device, a static testing device which is electrically connected with the wafer bearing device, and a wafer bearing device which is electrically connected with a switching device. The wafer bearing device is electrically connected with the static testing device, the dynamic testing device is electrically connected with the wafer bearing device, the switching device is electrically connected with the static testing device and the dynamic testing device, and the control device is electrically connected with the switching device and used for controlling the switching device to conduct the wafer bearing device and the dynamic testing device or conduct the wafer bearing device and the static testing device. Two types of tests can be completed by only using one test needle seat, and the two types of tests can be completed through one-time needle pressing, so that the damage to the wafer is reduced.

A busbar (11, 14) for measuring a direct and / or alternating current, in particular with current intensities of greater than 100 amperes, has connection regions (11a) and at least one resistance region (11b) which is arranged between the connection regions (11a) and has two measuring contacts (12) arranged in the resistance region (11b), wherein the busbar (11, 14) has a geometry in which the regions of the measuring contacts (12) are substantially deenergized during operation of the busbar (11, 14), wherein the busbar (11, 14) is formed in one piece. An apparatus (10) for determining current and having such a busbar (11, 14) and a power converter having such an apparatus are also disclosed.

The application discloses a voltage measurement circuit, method, device, equipment and storage medium. The circuit comprises a first resistance unit, a first end of the first resistance unit being connected with a sampling input end; N second resistance units with different resistance values, the N second resistance units corresponding to N different ranges, a first end of each second resistance unit being connected with a result output end; N first switch units, a first end of each of the N first switch units being connected with a second end of the first resistance unit, a second end of each of the N first switch units being connected with a second end of each of the N second resistance units one by one; N second switch units, a first end of each of the N second switch units being connected with a second end of each of the N second resistance units one by one; and a negative feedback unit, an input end of the negative feedback unit being connected with a second end of each of the N second switch units, and an output end of the negative feedback unit being connected with the result output end. The application can realize higher-precision voltage measurement.

The utility model relates to the technical field of motors, and provides a detection device for a power module of an industrial personal computer, which is applied to the power module of the industrial personal computer and comprises a power supply conversion module used for accessing commercial power and converting the commercial power into a 24V power supply signal for output; the load module is in coupled connection with the industrial personal computer power supply module, comprises a plurality of load units and is used for accessing power supply signals with different voltage values; the restart fault detection circuit comprises a heavy-load timing unit and a heavy-load counting unit, the heavy-load timing unit and the heavy-load counting unit are both in signal connection with the industrial personal computer power module, the heavy-load timing unit receives and displays the heavy-load loading duration, and the heavy-load counting unit receives and displays the heavy-load loading times. According to the invention, a purpose of facilitating a worker to timely obtain an operation state and a heavy load test result of the industrial personal computer power supply module under a heavy load condition is realized.

The application discloses a voltage acquisition circuit, a bipolar direct-current power supply and a voltage acquisition method. A voltage difference between a near-end voltage and a far-end voltage is calculated by a subtracter. First, second and third switch switching units combine the positive and negative states of a power supply output voltage to switch the connection relationship between the voltage difference output by a positive voltage compensation voltage unit, a negative voltage compensation voltage unit and the subtracter and two input ends of a comparator. When a positive voltage is output, the positive voltage compensation voltage unit is connected to the inverting input end of the comparator, and the output end of the subtracter is connected to the non-inverting input end of the comparator; when a negative voltage is output by the power supply, the negative voltage compensation voltage unit is connected to the non-inverting input end of the comparator, and the output end of the subtracter is connected to the inverting input end of the comparator. A control unit determines whether far-end sensing sampling is normal according to the high and low levels of an abnormal comparison voltage output by the comparator. The application can identify the situations of disconnection and reverse connection when the bipolar direct-current power supply outputs a negative voltage.

The invention relates to the technical field of semiconductor power devices, in particular to a GaN power module. The GaN power module based on improved current sampling comprises a copper-clad ceramic substrate, and the copper-clad ceramic substrate is provided with a main power loop; the at least one GaN switching device is arranged on the copper-clad ceramic substrate; at least one electrical breakpoint is arranged in the main power loop, a sampling resistor is integrated at the electrical breakpoint, and the two ends of the sampling resistor serve as current sampling points and are used for collecting main loop current flowing through the GaN switching device. According to the invention, the electrical breakpoint is arranged on the main power loop, and the sampling resistor is arranged at the electrical breakpoint, so that the real current flowing through the switching device is directly sampled, the resonance current is effectively avoided, and the sampled current waveform is pure and has no resonance interference.

The invention relates to a power semiconductor module with a power current path (17) in which a shunt resistor (1), in particular a resistor ≤50mOhm, is arranged, wherein the shunt resistor (1) has two main measurement contacts (2, 3) spaced apart from one another and having different polarities (+,-) and an auxiliary measurement contact (4) is arranged in the direct vicinity of the shunt resistor (1) without being in direct electrical connection to same, wherein a measurement line (20, 21, 22) leads from each measurement contact (2, 3, 4) to an evaluation unit (6) and forms loops (18, 19) which are practically identical in terms of area.

The invention relates to a radio frequency resonant cavity based on a short-circuit sliding block. The radio frequency resonant cavity comprises an input coaxial transmission line; the connector is connected with the input coaxial transmission line; the first output coaxial transmission line and the second output coaxial transmission line are connected with the connector. The first shifting mechanism is arranged on the first output coaxial transmission line, and the second shifting mechanism is arranged on the second output coaxial transmission line; each of the first output coaxial transmission line and the second output coaxial transmission line comprises an inner conductor, a short-circuit sliding block and an outer conductor, the outer conductor coaxially sleeves the inner conductor, a coaxial cavity is formed between the outer conductor and the inner conductor in a matching manner, and the short-circuit sliding block is connected with the first displacement mechanism and the second displacement mechanism; the short-circuit sliding block is movably arranged in the coaxial cavity. According to the ion cyclotron wave power transmission system, the effect of obtaining large voltage by means of small power is achieved, possible sparking points can be detected under the working condition of large voltage, then measures are taken in advance to prevent the sparking phenomenon, and stable operation of the ion cyclotron wave power transmission system is guaranteed.

The invention relates to a magnet device (11) for a magnetic resonance apparatus (10), the magnet device (11) comprising: a superconducting magnet (12); a discharge system (35); a switch (37) which is designed to interrupt a closed circuit in the superconducting magnet (12) and to transfer electrical energy which has accumulated in the superconducting magnet (12) to the discharge system (35); wherein the discharge system (35) comprises a supercapacitor (30) which is designed to buffer the electrical energy transport from the superconducting magnet (12) to the discharge element in the discharge system (35).

The invention discloses a detection circuit and a detection method for ground insulation resistance of a photovoltaic panel. The detection circuit for the ground insulation impedance of the photovoltaic panel comprises a first switch, a second switch and a third switch, wherein the first end of the first switch is connected to a connection point of a first insulation impedance and a second insulation impedance; the second end of the first switch is connected to a second grounding point; the first end of the voltage dividing module is connected with the first output end of the photovoltaic panel, the second end of the voltage dividing module is connected with the second output end of the photovoltaic panel, and the third end of the voltage dividing module is connected with the second end of the first switch; the voltage division module at least comprises a resistance voltage division unit which performs voltage division on the first end and the second end of the voltage division module and outputs the voltage through the third end of the voltage division module; the voltage sampling module is used for detecting the output voltage of the photovoltaic panel and detecting the voltage between the second end and the third end of the voltage division module; and judging whether the first grounding point and the second grounding point are in common ground according to the detected voltage change.

The application discloses a partial discharge signal generation method and system, computer equipment and a storage medium, comprising: generating a PRPS atlas, converting the PRPS atlas into a pulse sequence, importing the pulse sequence into a partial discharge signal generation device and saving it locally, obtaining the pulse sequence, analyzing the pulse sequence to convert it into a PRPS atlas, selecting the PRPS atlas, setting output parameters according to the phase coordinates, amplitude coordinates and real-time power frequency information of the PRPS atlas, and outputting corresponding signals. The application can obtain a power frequency in real time, output any very high frequency or high frequency partial discharge signal, has two independent output channels, can simultaneously output very high frequency or high frequency partial discharge signals respectively, the signal type, amplitude, pulse number, carrier frequency and other parameters can be adjusted, and the function test, calibration, sensitivity test, time difference positioning test and partial discharge type identification test of a partial discharge detection device can be realized. The application has multiple function applications such as remote control, cluster work and competition mode.