412results about "Voltage dividers" patented technology

The invention relates to the technical field of voltage acquisition, in particular to a battery string voltage acquisition system with a calibration system and a voltage acquisition method. Which comprises a multi-path voltage input end, a voltage signal adjusting end, a voltage follower, an analog-to-digital converter, a main control center and a communication circuit, and is characterized in that the voltage signal adjusting end comprises a dynamic voltage division network, consists of a digital potentiometer and a high-voltage operational amplifier, and dynamically adjusts the voltage division ratio to suppress common-mode voltage; the main control center is integrated with a multi-channel synchronous sampling calibration module and generates a global synchronous signal through the main MCU to control the ADC to perform synchronous acquisition; a temperature compensation module is arranged between the voltage follower and the ADC, and a digital temperature sensor is adopted to correct the gain drift of the operational amplifier in real time; the voltage division ratio of the dynamic voltage division network is dynamically adjusted according to the real-time common-mode voltage and a preset safety threshold value. According to the scheme, dynamic partial pressure adjustment, multi-channel self-calibration, nonlinear temperature compensation and a rapid protection mechanism can be integrated.

Method for estimating the voltage value relating to a live element uses five capacitors, wherein a first capacitor has its first pole connected to said live element; a second capacitor has its first pole connected to said live element; a third capacitor has its first pole connected to the second pole of the first capacitor and its second pole connected to ground; a fourth capacitor has its first pole connected to the second pole of the second capacitor and its second pole connected to the first pole of a fifth capacitor. The voltage value is estimated using: 1) a voltage value relating to a first node positioned along the conducting wire that connects the first capacitor to the third capacitor 2) a voltage value relating to a second node positioned along the conducting wire that connects the fourth capacitor to the fifth capacitor; 3) a capacitance value of the third capacitor; 4) a capacitance value of the fourth capacitor; 5) a capacitance value of the fifth capacitor.

The utility model discloses a grading regulation and control type voltage signal detection circuit, and belongs to the technical field of voltage signal detection. The circuit comprises a multi-stage voltage division module, a voltage division adjusting module and a signal detection end, and the multi-stage voltage division module is coupled to a detected load and used for achieving multi-gear voltage division of the voltage difference between the positive electrode and the negative electrode; the voltage division adjusting module controls access of divider resistors of different gears through a switching unit, and dynamic adjustment adapting to different voltage ranges is achieved. And the signal detection end is used for detecting and outputting the processed voltage signal. The circuit can automatically switch proper voltage division coefficients according to different load voltages, realizes wide-range high-precision voltage detection, effectively improves the stability and accuracy of voltage acquisition, improves the test quality and production efficiency of a PIV curve, and is especially suitable for test application of voltage fluctuation sensitive equipment such as a laser.

The invention discloses a voltage and current synchronous measurement method for a high-voltage power supply of a fusion device, which is suitable for accurately sampling and monitoring voltage and current signals of each key node of the high-voltage power supply of the fusion device. According to the method, firstly, a resistance-capacitance voltage division technology is adopted, a front-end high-voltage attenuation network is constructed by utilizing high-precision resistors and capacitors, and stable voltage division and linear attenuation of high-voltage signals are achieved; then, electrical isolation is realized through a small-signal voltage and current transformer, and multi-channel synchronous acquisition of voltage and current signals is completed respectively. Then, the ADC module adopts two multi-channel AC sampling special electric energy metering chips to realize ten-channel synchronous acquisition of high voltage and current signals. And finally, the FPGA receives, processes and analyzes the acquired data in real time, and transmits a result to an upper computer monitoring platform. According to the method, the synchronism, the precision and the anti-interference performance of a fusion power supply high-voltage measurement system are remarkably improved, and reliable data support is provided for safe and stable operation of a fusion device.

The utility model discloses a current sampling system and an energy storage device. The current sampling system comprises a control unit, a plurality of current sampling circuits and a plurality of signal processing circuits, wherein each current sampling circuit is provided with a sampling resistor and a switching device; a connecting end after the first ends of the current sampling circuits are connected is connected with the negative electrode end of the storage battery, and a connecting end after the second ends of the current sampling circuits are connected is connected with an external power device; the signal receiving end of each signal processing circuit is connected with the sampling resistor in the current sampling circuit corresponding to the signal processing circuit, and is used for collecting differential voltage at the two ends of the sampling resistor and sending the differential voltage to the control unit; the control unit is used for receiving the differential voltage and determining the battery current of the storage battery based on the differential voltage. According to the technical scheme disclosed by the utility model, the sampling precision of the battery current of the storage battery can be improved.

The invention provides a battery capacity detection circuit and detection method. One end of a first signal link of the battery capacity detection circuit is used for being connected with a battery to be detected, and the other end is connected with a first control unit; one end of the second signal link is connected to the first signal link, and the other end is grounded; a divider resistor is arranged on the second signal link; the second control unit is configured to disconnect the second signal link before detecting the capacity of the battery to be detected; under the condition that the capacity of the battery to be detected is detected, conducting a second signal link; the first control unit is used for acquiring a first voltage signal when the second signal link is disconnected and acquiring a second voltage signal when the second signal link is connected; the first control unit is also used for obtaining the capacity of the to-be-detected battery based on the first voltage signal and the second voltage signal; the capacity of the to-be-detected battery is calculated through the first signal and the second signal, and compared with detection of a single voltage value, the detection accuracy is higher.

A test circuit (11) comprises a supply terminal (12), a reference potential terminal (13), a first number N of digital terminals (14 - 16) and a first number N of switches (17 – 19), a supply input terminal (35), and a support resistor (37). The support resistor (37) is coupled to the supply terminal (12) and to the supply input terminal (35). A switch (17) is coupled to the supply terminal (12) and to a digital terminal (14). An industrial device (50) comprises a supply line (51), a reference potential line (73), a control circuit (52), a second number M of device terminals (53 – 55) and a presence detector (83) coupled to the supply line (51) and to the reference potential line (73). The presence detector (83) is configured to detect a first value of a supply voltage (US1) at the supply line (51) when the presence detector (83) is in a high resistive state, and a second value of the supply voltage (US1) when the presence detector (83) is not in a high resistive state.

The embodiment of the utility model provides a range switching circuit and a formation and capacity grading system, and belongs to the technical field of electronic circuits. The range switching circuit comprises: a reactor circuit comprising a plurality of reactors; a sampling circuit coupled to the reactor circuit to detect a current flowing through the reactor circuit; the range switching module comprises a switch control circuit and at least one bypass switch module, the bypass switch module is connected with the at least one electric reactor in parallel, a switch control pin of the bypass switch module is connected with the switch control circuit, and the rate of a switch signal output by the switch control circuit is larger than the sampling rate of the sampling circuit; and the current compensation module is connected with the sampling loop of the sampling circuit and is used for performing current compensation under the condition that the current of the sampling loop changes suddenly. According to the embodiment of the invention, the current measurement precision of the battery in the formation and capacity grading process is improved.

The invention provides an implementation method for measuring the ignition resistance of an industrial electronic detonator, which belongs to the technical field of resistance measurement, and comprises the following steps: the measurement of the ignition resistance of the industrial electronic detonator is realized based on a detection circuit, the detection circuit comprises an MCU microcontroller U1, a single-pole double-throw physical relay U2, a relay change-over switch triode Q1, a divider resistor R1 and a divider resistor R2 of the measurement circuit, and a dual-path integrated operational amplifier. The test state of the ignition resistor is switched based on a single-pole double-throw physical relay U2 and a relay change-over switch triode Q1; a millivolt-level weak signal is output to a measuring circuit based on the MCU microcontroller U1, and specific voltage values of a point A and a point B corresponding to the divider resistor R1 and the divider resistor R2 in different test states are controlled; the specific voltage values of the point A and the point B are amplified by the same multiple based on the integrated operational amplifier of the two paths, so that the current value flowing through the measuring circuit is calculated, the ignition resistance value is calculated, and the measuring precision is effectively guaranteed.

The invention relates to a method for contactlessly providing a function in a motorized vehicle, the method comprising the steps of: a) recognizing (S2) the approach of a person towards the motorized vehicle; b) recognizing (S4) a gesture of the person; and c) providing (S5) a function in response to the recognition by steps a) and b), wherein ultrasonic signals are transmitted and received for the recognition in steps a) and b), and (i) the signal repetition rate of the transmitted ultrasonic signals is higher in step b) than in step a), and / or (ii) the repetition rate for receiving the ultrasonic signals is higher in step b) than in step a).

Disclosed techniques relate to a system for testing a capacitor. An example system includes an inverter to convert DC power from a battery to AC power to drive a motor. The inverter includes a noise filter including a first capacitor connected in series with a second capacitor and a testing circuit configured to test one or more of the first capacitor or the second capacitor. The testing circuit includes a voltage divider including resistors; a voltage detector configured to measure a voltage at the voltage divider; a switch configured to connect the noise filter to the voltage divider; and one or more controllers configured to control an operation of the switch to connect the noise filter to the voltage divider, and to determine, from an output of the voltage detector, whether one or more of the first capacitor or the second capacitor are connected to the noise filter.

A measuring system comprises a voltage converter circuit that converts and outputs a voltage between a first terminal and a second terminal, and a computing device that detects anomalies in the voltage converter circuit. The voltage converter circuit comprises: a first output circuit that outputs a first output voltage obtained by multiplying a potential of the first terminal with respect to a predetermined reference potential by a conversion gain; a second output circuit that outputs a second output voltage obtained by multiplying a potential of the second terminal with respect to the reference potential by a conversion gain; and a third output circuit that outputs a third output voltage obtained by multiplying a voltage between the first terminal and the second terminal by a conversion gain.The conversion gains of the first output circuit, the second output circuit, and the third output circuit can be set to values ​​of at least one first group and one second group, and the ratio between a first group conversion gain and a second group conversion gain set in the third output circuit differs from the ratio between a first group conversion gain and a second group conversion gain set in the first output circuit or the second output circuit.The computing device comprises the following: a voltmeter which measures the first output voltage, the second output voltage and the third output voltage, and a diagnostic unit which, using conversion gains of a selected group, which is one of the first group and the second group, calculates a first conversion value, a second conversion value and a third conversion value corresponding to input voltages of the first output circuit, the second output circuit and the third output circuit, based on the first output voltage, the second output voltage and the third output voltage, and determines that an anomaly exists if the sum of the first conversion value and the second conversion value deviates from the third conversion value by at least one predetermined value.

The invention discloses a self-adaptive high-precision voltage detection device and method for a high-voltage bushing end screen, the device comprises a high-voltage arm unit, a low-voltage arm unit, a signal acquisition unit, a control unit and a power supply unit, and the high-voltage arm unit takes the capacitance characteristic of a high-voltage bushing as a high-voltage arm; the high-voltage arm unit is connected with the low-voltage arm in parallel, the low-voltage arm is connected with the signal acquisition unit, and the signal acquisition unit is connected with the control unit; the power supply unit is connected with the low-voltage arm unit and the control unit. Wherein the signal acquisition unit is used for monitoring partial voltage and current signals of the low-voltage arm unit, the partial voltage and current signals are fed back to the control unit for processing, parameters of the low-voltage arm unit are dynamically adjusted to maintain a stable partial voltage ratio, and the capacitance value of the high-voltage bushing is measured and monitored. By means of the device, the influence of high-frequency parameter changes on the high-voltage bushing can be quantified, and more accurate and stable online monitoring is achieved.

The present invention discloses a DC voltage transformer, comprising: a resistor-capacitor voltage divider, a primary converter, and a secondary photoelectric conversion unit; the primary converter comprising a resistor-capacitor matching adjustment unit and a signal processing unit; the resistor-capacitor matching adjustment unit being configured to calculate the value ranges of an adjustable resistor and an adjustable capacitor based on stray capacitance parameters obtained by electric field simulation of the resistor-capacitor voltage divider when the resistor-capacitor matching relationship in the resistor-capacitor voltage divider is disrupted, and to adjust the adjustable resistor and the adjustable capacitor respectively; the signal processing unit being electrically connected to the resistor-capacitor matching adjustment unit and performing buffering, amplification, and low-pass filtering on a voltage signal passing through the resistor-capacitor matching adjustment unit, thereby converting the processed voltage signal into an optical signal, which is then transmitted to the secondary photoelectric conversion unit via an optical fiber. The present invention solves the technical problems in the prior art in that the stray capacitance of the resistor-capacitor voltage divider has a significant impact on frequency characteristics and that the analog signal transmission process is easily interfered with.

The utility model provides a voltage sampling circuit based on electric field coupling and a radio frequency matcher. The voltage sampling circuit based on electric field coupling comprises a voltage sampling probe and an adjustable voltage dividing unit. The voltage sampling probe is used for acquiring a high-frequency high-voltage signal output by the radio frequency matcher through electric field coupling based on a distributed capacitor formed by the voltage sampling probe and sampling points of the radio frequency matcher, and outputting the acquired high-frequency high-voltage signal to the adjustable voltage dividing unit; and the adjustable voltage division unit is used for performing voltage division on the high-frequency and high-voltage signal by using the adjusted voltage division multiple after being triggered and adjusted, and outputting the high-frequency and high-voltage signal after voltage division to the processing module. According to the utility model, based on a distributed capacitor formed by the voltage sampling probe and the sampling points of the radio frequency matcher, an output voltage signal is obtained through electric field coupling, voltage sampling with electrical isolation is realized, and the problem of long installation and debugging time of the voltage sampling probe and the radio frequency matcher is solved by adjusting the voltage division multiple of the adjustable voltage division unit.

The semiconductor device includes: an insulating layer provided on a semiconductor substrate; a first resistor embedded in the insulating layer and electrically connected to a node on a first potential side; a second resistor embedded in the insulating layer; a third resistor embedded in the insulating layer; and a reference electrode electrically connected to a node on a second potential side of the third resistor. An absolute value of the first potential is greater than an absolute value of the second potential. The first resistor, the second resistor, and the third resistor are connected in series. The first resistor is formed by connecting N resistors in parallel, the second resistor is formed by connecting M resistors in parallel, and the third resistor is formed by connecting L resistors in parallel, with N<L and M<L satisfied.

The present invention relates to a battery pack voltage measurement circuit and a method for operating the same, and more particularly, to a battery pack voltage measurement circuit for measuring a voltage of a battery pack and outputting a result value thereof, and a method for operating the same. According to the present invention, it is possible to reduce the manufacturing cost of the battery pack voltage measuring circuit by providing an environment in which a relay element of low specifications can be used through a series connection structure and a parallel connection structure of a plurality of resistors.

A system and method for compensating for drift in a switch gear voltage sensor. The system includes a circuit, and an electronic processor. The circuit is configured to receive a first signal from a first capacitor of the voltage sensor and receive a second signal from a second capacitor of the voltage sensor. The circuit is further configured to generate a third signal and a fourth signal based on the first signal and the second signal. The electronic processor is configured to receive the third signal and the fourth signal and determine an angular frequency, a phase difference, a resistance value, a voltage across a compensation capacitor, an initial gain, a capacitance of the second capacitor, a capacitance and a voltage of the compensation capacitor, and a final gain.

The utility model discloses a current detection amplifying circuit in the technical field of direct current motor detection, which comprises a detection resistor R0, the detection resistor R0 is connected in series in an armature main loop, two ends of the detection resistor R0 are connected with a voltage division loop, the voltage division loop is respectively connected with a detection circuit and an amplitude limiting circuit, and the detection circuit is connected with a zero setting filter circuit; the voltage loaded on the detection circuit is in a safe range through the voltage division loop, the amplitude limiting loop controls a voltage signal input to the detection circuit, the detection circuit outputs a voltage signal reflecting the armature current of the direct current motor, and the change of the current is reflected through the change of the voltage signal. The circuit is simple, practical, good in portability, high in detection precision and low in cost.

The present invention discloses a current detection circuit, a leakage current detection method and a charging system. The current detection circuit can output an excitation signal to a first winding in a magnetic induction coil, and then determine whether there is leakage current in a first conductor passing through the magnetic induction coil based on a feedback signal and a reference signal induced by the first winding. In other words, it can be determined whether there is leakage in the process of a charging device providing electric energy to the outside, and the determination result can be provided to a control circuit. When leakage occurs, the control circuit can promptly cut off the circuit of the charging device providing electric energy to the outside, so that the charging device stops providing electric energy to the outside, thereby reducing the occurrence of hazards and improving the safety and reliability of the charging process. At the same time, the reaction speed of the charging process control can be improved, and the timeliness can be improved. In addition, the application range of the current detection circuit is not limited by region and climate, which greatly broadens the application range of the current detection circuit.

The utility model relates to measuring alternating current parameter technical field discloses alternating current parameter tester, include: the signal acquisition module for carrying out the collection to the product parameter signal of measurement, prevent the short circuit protection module of instrument appearance short circuit or reverse connection and influence test process, signal acquisition module includes the voltage division unit, filter unit, AD conversion unit that connect gradually, short circuit protection module includes signal amplification unit, signal isolation unit, on-off control unit that connect gradually. The utility model has the advantages of high collection precision, fast speed, good stability by precision resistance voltage division, then filtering processing, and the analog signal is converted into digital signal and handles, can use in high temperature and normal temperature environment, newly added short circuit protection module that can test the protection of product, no matter what kind of circuit problem appears in the process of testing the product, can realize automatic protection, will not influence the alternating current parameter measurement of test instrument to product.

A circuit and method for measuring an average current of a solenoid valve, relating to the technical field of automotive electronics. The circuit comprises a solenoid valve (110), a first power supply (120), a sampling resistor, a field effect transistor drive circuit (130), a current acquisition circuit (140), an integrator circuit (150), and an integration reset circuit (160); the field effect transistor drive circuit (130) is used for controlling an on-off state of a first field effect transistor on the basis of a pulse width modulation gating signal; the first power supply (120) is used for providing a drive current for the solenoid valve (110) when the first field effect transistor is in an on state, and the drive current flows through the sampling resistor; the current acquisition circuit (140) is used for sampling voltage signals on two sides of the sampling resistor, and outputting the voltage signals to the integrator circuit (150); the integrator circuit (150) is used for performing integration processing on the voltage signals, and determining an average current of the solenoid valve (110) on the basis of an integration result; and the integration reset circuit (160) is used for performing periodic reset processing on the integrator circuit (150) on the basis of the pulse width modulation gating signal.

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 embodiment of the invention provides a voltage monitoring circuit, and belongs to the technical field of integrated circuits. The voltage monitoring circuit comprises a specification configuration circuit, a voltage monitoring module and a latch module. The specification configuration circuit is used for acquiring a to-be-tested signal, and performing voltage division on the to-be-tested signal through a divider resistor with preset parameters to obtain an upper limit voltage and a lower limit voltage corresponding to the to-be-tested signal; the voltage monitoring module is connected with the specification configuration circuit, and is used for comparing the upper limit voltage with the rising threshold voltage through a window comparator, comparing the lower limit voltage with the falling threshold voltage, and outputting a comparison result; and the latch module is connected with the voltage monitoring module and is used for outputting an abnormal indication signal and latching the abnormal indication signal under the condition that the comparison result represents abnormity. According to the embodiment of the invention, the processing speed of the abnormal signal is improved, and the instant abnormal phenomenon of the to-be-detected signal is monitored.

The invention relates to a measuring transducer arrangement (1) with an annular carrier element (7), which is made of an electrically conductive material, and a voltage sensor (3), which comprises a conductor film (15) arranged on the carrier element (7) and having a first layer (23) and a second layer (24). The first layer (23) has at least one strip-like measuring electrode (27), which is connected to an electrical measurement potential. The second layer (24) has at least one strip-like earth electrode (28), which is connected to an electrical earth potential. The carrier element (7) is connected either to the measurement potential or to the earth potential.

To provide a means for more easily determining the internal voltage of an insulated connection used in extra-high voltage lines or high-voltage lines. [Solution] A system for measuring the internal voltage of an insulating connection 10 used in extra-high voltage lines or high voltage lines, which is provided with at least an insulator 11, a shielding electrode 12, an internal electrode 13, an open port 14, and an insulating plug 15, comprising at least a unit to be measured 20 consisting of one or more dielectrics connected in series with the insulating plug 15, a voltmeter 30 capable of measuring the voltage value of any one of the one or more dielectrics, and a calculation unit 40 that calculates the internal voltage of the insulating connection 10 by multiplying the voltage value of the dielectric to be measured by a coefficient assigned to at least each component of the unit to be measured 20.

The utility model provides a grounding monitoring circuit and a grounding monitoring device. The grounding monitoring circuit is connected with target equipment. The grounding monitoring circuit comprises a main control module and a voltage dividing module, the monitoring end of the voltage dividing module is connected with the grounding end of the target equipment, and the output end of the voltage dividing module is connected with the main control module; wherein the voltage dividing module is used for outputting a corresponding monitoring signal to the main control module according to the state of the grounding end of the target equipment; and the main control module is used for determining the grounding end state of the target equipment according to the monitoring signal sent by the voltage dividing module. The grounding condition of the grounding end of the target equipment is monitored by arranging the voltage dividing module, interference of environmental static electricity can be effectively avoided, the accuracy of grounding monitoring is guaranteed, and meanwhile, the voltage dividing module is simple in structure and convenient to maintain in practical application.

The present invention discloses a large current measurement device based on a magnetic coupling mutual inductance voltage divider structure, comprising an incoming line shunt, a multi-coupled mutual inductance voltage divider coil, a magnetic energy detection unit, a magnetic energy storage unit and a control module. By setting a plurality of magnetic energy detection units, it is determined whether the current voltage signal exceeds a measurement threshold. If so, unactivated windings and corresponding magnetic energy detection units are continuously connected to ensure that the multi-coupled mutual inductance voltage divider coil does not reach the magnetic saturation in the nonlinear region, thereby achieving high-precision and wide-range current detection. Moreover, if the total voltage signal is still greater than the measurement threshold after all magnetic energy detection units are loaded, the electric energy in the energy storage element is discharged through the magnetic energy storage unit, thereby ensuring that the multi-coupled mutual inductance voltage divider coil does not reach the magnetic saturation in the nonlinear region.

The application discloses a standard capacitance voltage divider for measuring wide-range voltage and a measuring method. The standard capacitance voltage divider for measuring wide-range voltage comprises an insulating outer cylinder, an electrode module arranged at the upper end inside the insulating outer cylinder and a low-voltage arm module arranged at the bottom outside of the insulating outer cylinder. The electrode module comprises a high-voltage electrode, a low-voltage electrode and a shielding electrode. The high-voltage electrode, the low-voltage electrode and the shielding electrode are coaxially combined. The lower end of the shielding electrode is connected with a lower flange arranged at the bottom of the insulating outer cylinder through a supporting rod. The low-voltage arm module comprises a low-voltage arm external box and a low-voltage arm. The low-voltage arm external box is fixed at the lower end of the lower flange. The low-voltage arm is arranged in the low-voltage arm external box. The wide dynamic voltage can be reliably and accurately measured.

To provide an abnormality detection device which can eliminate a pull-up resistor for voltage monitoring.SOLUTION: A pull-down resistor Rdu is composed of two voltage dividing resistors Rdu1 and Rdu2 which divide voltage between an inter-arm connection point Nu being a connection point between an upper arm element 61 and a lower arm element 64 and the ground, and connects the inter-arm connection point Nu and the ground. A determination unit 25 detects abnormality of at least the upper arm element 61 and the lower arm element 64 based on voltage of a voltage dividing point Du being the connection point of the two voltage dividing resistors Rdu1 and Rdu2. A power supply line Lp and the inter-arm connection point are not connected through a pull-up resistor. The determination unit 25 detects ON fastening abnormality and OFF fastening abnormality of the upper arm element 61 and the lower arm element 64 based on voltage of the voltage dividing point Du when leak current IL flows to the ground from an upper arm element drive circuit 31 through the pull-down resistor Rdu during operation of the upper arm element drive circuit 31.SELECTED DRAWING: Figure 2