10 results about "Resistive type" patented technology

The utility model discloses a kind of high-efficiency heat dissipation resistance bimetallic strip, it is related to bimetallic strip technical field, including upper metal sheet, the bottom of the upper metal sheet is equipped with lower metal sheet, and the inside of the upper metal sheet and lower metal sheet is equipped with inner metal sheet, the side of the upper metal sheet is equipped with connecting plate, the inside of the connecting plate is fixedly connected with connecting column, the inside of the connecting column is threadedly connected with fixed bolt one, the side of the inner metal sheet is fixedly connected with heat-conducting sheet, the utility model is equipped with inner metal sheet inside the upper metal sheet and lower metal sheet, inner metal sheet inside fixedly connected heat-conducting sheet can absorb the heat on inner metal sheet, upper metal sheet and lower metal sheet inside the arc-shaped groove inside and heat-conducting sheet are clamped, the copper sheet of arc-shaped groove inside is in contact with heat-conducting sheet, heat is quickly discharged by radiating bump one and radiating bump two, improve the heat dissipation of resistance bimetallic strip.

This invention discloses a resistance testing method, relating to the technical field of intelligent testing, comprising the following steps: Step S100, testing a resistor of any type, independently analyzing the test results to obtain its own characteristics; Step S200, performing forward and reverse tests on the resistor under test according to the testing method, obtaining positive and negative results; Step S300, classifying the resistor under test into grades based on the positive and negative results and its own characteristics. This invention improves the scientific nature of subsequent analysis and the rationality of test parameters by screening effective historical data, avoiding irreversible damage to the resistor, and improving the economy of testing. By taking the average value of forward and reverse tests and analyzing the difference, it eliminates unidirectional systematic errors such as contact resistance, lead resistance, and thermoelectric potential.

The application discloses a resistance type airflow sensor, comprising: a front shell; a rear shell clamped at the rear end of the front shell; and a sensing element packaged between the front shell and the rear shell, wherein the sensing element comprises a hard plate base material and a sensing chip, the hard plate base material is fixedly installed with the front shell, the sensing chip is fixedly installed with the rear shell, one side of the hard plate base material is provided with a sensitive membrane, and the sensing chip is connected with the sensitive membrane through a wire harness. The protective plate is arranged on the front shell and the rear shell, the fan-shaped rubber pieces on the inner wall of the protective plate are mutually adsorbed and closed through rubber magnetic strips in the absence of airflow, a barrier is formed, and particulate matters and condensate in the airflow are effectively blocked from directly contacting the sensitive membrane; when the airflow passes, the airflow pressure pushes away the rubber pieces, allows the airflow to pass, but blocks most of the pollutants, thereby protecting the sensitive membrane from being polluted, ensuring long-term stability and accuracy of the sensor; meanwhile, the protective plate is connected with the groove through a threaded ring, is convenient to disassemble and clean, and maintenance convenience is improved.

The application discloses a resistance testing method, and relates to the technical field of intelligent testing, and comprises the following steps: step S100, testing any resistance model of resistance, independently analyzing the testing result, and obtaining self characteristics; step S200, performing positive testing and reverse testing on the resistance to be tested according to the testing method, and obtaining positive result and reverse result; and step S300, dividing the grade of the resistance to be tested according to the positive result, the reverse result and the self characteristics. Through screening of effective historical data, the application improves the scientificity of subsequent analysis and the rationality of testing parameters, avoids irreversible damage to the resistance, improves the economy of testing, eliminates one-way system errors such as contact resistance, lead resistance and thermoelectric potential through mean value taking of positive and reverse testing and difference value analysis.

An RTD (Resistant Temperature Detector) test terminal and device are disclosed, relating to the field of PLC testing technology. Addressing the problems of excessive manual wiring and switching operations, low testing efficiency, susceptibility to connection errors or omissions, and difficulty in achieving rapid and stable multi-channel measurements in existing PLC testing processes, this invention provides an RTD test terminal. The terminal includes a main body with a circuit board, probes and pin sleeves, a cover plate, an upper cover plate, a back clamp bracket, a back clamp, a back clamp baffle, and pin sleeve slots. The probes and pin sleeves are used to contact the tested terminal. The circuit board is used for electrical connection with the probes and switching output levels. The cover plate and upper cover plate are used for encapsulation, and the back clamp bracket, back clamp, and back clamp baffle are used for clamping and mounting. This test terminal is suitable for rapid testing and switching measurements of RTD signal channels in PLC cabinets.

This invention discloses an isolated current source converter based on an SP-type pseudohermite coreless transformer, comprising a negative resistor, an SP-type pseudohermite coreless transformer, a full-bridge rectifier, and a load resistor. The negative resistor is connected to the input terminal of the SP-type pseudohermite coreless transformer. The full-bridge rectifier includes a first rectifier arm, a second rectifier arm, an output filter inductor, and an output filter capacitor. The switching nodes of the first and second rectifier arms are connected to the output terminal of the SP-type pseudohermite coreless transformer. The output filter inductor and output filter capacitor are connected in series and then in parallel with the first and second rectifier arms, respectively. The output filter capacitor is connected in parallel with the load resistor. This invention, using an SP-type pseudohermite coreless transformer as its core, realizes a coreless isolated current source converter with constant current output characteristics independent of the load. This invention achieves corelessness, greatly reducing the weight, size, and cost of the isolated current source converter.

This application discloses a calibration device and method for an active rod antenna, relating to the field of antenna calibration. The device includes a metal shielding housing and a resistive T-network module and a capacitor integrated within the metal shielding housing. The resistive T-network module simulates the input impedance of the active rod antenna, and the capacitor simulates the distributed capacitance. When the input RF interface is connected to a standard signal source, the output RF interface is connected to a spectrum analyzer, and the ground terminal is connected to the active antenna host, the antenna factor of the active rod antenna is calculated by measuring the first signal strength at the output RF interface and the second signal strength at the output port of the active antenna host, thus completing the calibration. This application enables portable, accurate, and efficient calibration of active rod antennas.

The utility model relates to the field of automobile manufacturing, concretely relates to a low pressure wire harness for mistake proofing of resistance type circuit. It includes cabin wire harness, front protection wire harness, left front bluetooth slave module and right front bluetooth slave module, is provided with the joint pressure point between front protection wire harness and left front bluetooth slave module, right front bluetooth slave module, forms the branch wire harness of left front bluetooth slave module and right front bluetooth slave module, the branch wire harness length of left front bluetooth slave module and right front bluetooth slave module is same and all is less than or equal to 1m. The utility model relates to the improvement cost of wire harness circuit is low, and the risk of wrong installation is solved forever, and other negative influence will not be brought.

The application relates to the technical field of energy monitoring, in particular to a temperature monitoring circuit, method, device and energy management system. The circuit comprises a plurality of resistance type temperature sensors, the temperature sensors are arranged at temperature monitoring points with different heat capacity characteristics respectively, are used for monitoring the temperature of the corresponding monitoring points, and a sensor network is formed by the plurality of temperature sensors in parallel, and the plurality of temperature sensors have different temperature-electricity characteristics. A signal acquisition circuit is connected with the sensor network, is used for converting the equivalent resistance of the sensor network into a single analog signal output, a signal processing unit is connected with the output end of the signal acquisition circuit, is used for collecting the analog signal, and performs characteristic analysis on the analog signal to determine the temperature monitoring point with abnormal temperature rise. On the one hand, the problem that the complexity is high and the cost sharply rises with the number of monitoring points is solved, and on the other hand, the temperature states of a plurality of monitoring points with different heat capacities and response characteristics such as battery cells and welding points are distinguished.

This invention discloses a low-area comparator offset calibration circuit suitable for sub-ADCs, relating to the field of integrated circuit design technology. The circuit includes a capacitive digital-to-analog converter (DAC) module, a resistive DAC module, a comparator module, and a successive approximation logic module. The capacitive DAC module is a fully differential structure, including a positive-terminal capacitor array and a negative-terminal capacitor array. This invention utilizes a high-area-efficiency R-DAC to replace the traditional large-area capacitor calibration array, and further reduces the number of resistors through a segmented structure. Comparator offset is compensated by injecting an adjustable voltage into the calibration capacitor base plate. This invention significantly reduces circuit area overhead and power consumption while maintaining calibration accuracy, with minimal impact on main circuit performance, making it particularly suitable for area-constrained sub-ADC applications.