Abstract: Changes over time in a measured impedance are displayed in an easy to identify manner. A measurement result display apparatus includes a processor that executes a measurement result display process that displays measurement results on a display 5 based on measurement result data produced by encoding impedances that have been measured by a measurement apparatus. During the measurement result display process, the processor displays, on the display 5 and based on a plurality of measurement result data of impedances that satisfy a predetermined comparison condition and were produced by the measurement apparatus at different measurement times, a measurement result display screen 20 with measurement result displays 21a to 21d (graphs) in which the impedances for respective measurement result data are aligned in order of measurement time.

Abstract: Provided is a measurement system in which a measurement instrument and a terminal are configured so as to be communicatable. The measurement instrument is provided with: a measurement unit configured to execute measurement processing for measuring a physical quantity of a measurement target; a detection unit configured to detect execution of the measurement processing; and a transmission permission unit configured to permit transmission of a measurement result to the terminal, the permission being triggered by detection of the execution of the measurement processing by the detection unit. The terminal is provided with: a result reception unit configured to receive the measurement result from the measurement instrument; and an execution unit configured to execute a predetermined processing based on the measurement result received.

Abstract: The characteristics of a winding to be tested is allowed to be analyzed more easily and in a shorter time. A testing instrument 1 includes an impulse voltage application capacitor Cs having one end connected to an external terminal T2, a switch SW and a current limiting resistor Rs connected in series between another end of the impulse voltage application capacitor Cs and an external terminal T1, and a parameter calculator 5. The parameter calculator 5 calculates at least one of the value of the equivalent capacitor Cd, the value of the equivalent inductor Ld and the value of the equivalent resistor Rd by performing regression analysis using a measured value of a voltage Vcd in an analysis time period Ta from turning on of the switch SW to start of resonance based on the equivalent inductor Ld, the equivalent capacitor Cd and the equivalent resistor Rd pertaining to a winding 11.

Abstract: A current sensor includes an excitation detection winding configured such that an excitation signal for exciting a second magnetic core is input, the excitation detection winding detects magnetic flux flowing through the second magnetic core and outputs a detection signal indicating a measurement-target current. The current sensor includes an auxiliary winding that detects the magnetic flux and outputs an auxiliary signal indicating the measurement-target current. The current sensor includes a feedback winding wound around first and second magnetic cores, the feedback winding being configured such that a signal generated from the detection signal is input, and the feedback winding being wound to cancel out magnetic flux of the first and second magnetic cores. The current sensor includes a circuit to output an output signal indicating a level of the measurement-target current by modifying a signal output from the feedback winding based on a correction signal generated from the auxiliary signal.

Abstract: The probe apparatus has a probe (first metal plate) as a signal terminal and a probe (second metal plate) as a ground terminal. A probe holder has a holder main body formed of a conductor, clamps that are formed of a dielectric and capable of clamping the probes, and a fixing member and a male screw (or “fixture”) capable of fixing both clamps, which have clamped the probes, to the holder main body. The probes are clamped by the two clamps in a state where the probes have been aligned along the plate surface direction, parts at front-end portion sides of the probes protrude from the two clamps, and the parts at front-end portion sides are capable of elastic deformation along the plate thickness direction.

Abstract: A measurement apparatus of a power storage device supplies constant current to the power storage device, measures voltage of the power storage device, and computes an internal state of the power storage device on the basis of voltage change in the power storage device subjected to the measurement.

Abstract: An amplifier circuit includes an operational amplifier to amplify an input signal input to a non-inverting input terminal, first and second feedback units to feed back an output signal output from the operational amplifier to an inverting input terminal of the operational amplifier, and a coupling unit to AC couple the second feedback unit and the inverting input terminal. The first feedback unit is to, together with the coupling unit, as a frequency of the output signal of the operational amplifier is increased, reduce an electric potential to be applied to the inverting input terminal with respect to the output signal. At the same time, the second feedback unit is to generate a predetermined electric potential lower than an electric potential of the output signal, the second feedback unit being configured to apply a predetermined electric potential to the inverting input terminal via the coupling unit.

Abstract: A state determination apparatus includes: electrodes configured to apply AC signal to a mixture; a measurement unit configured to measure an impedance of the mixture for every frequency of the AC signal based on a response signal flowing through the mixture when the AC signal is applied; a setting unit configured to set an equivalent circuit including one or a plurality of parallel circuit(s) based on element(s) corresponding to electrical component(s) of a solid matter; a calculating unit configured to calculate a parameter of the parallel circuit by executing an equivalent circuit analysis for approximating impedance of the equivalent circuit to the impedance of the mixture; and a derivation unit configured to derive an index for specifying a state of the mixture based on the parameter of the parallel circuit.

Abstract: A measuring apparatus includes: N pairs of probes that are respectively connected to a positive electrode and an external member of N rechargeable batteries that have a capacitance connected in parallel between the positive electrode and the external member; a scanner that selectively switches to one pair of probes out of the N pairs; a measuring apparatus that measures the voltage between the selected probes; and a controller. A plurality of resistance configurations to be connected between each pair of probes are provided. After a standby time has elapsed in a state where the N pairs of probes are connected to the positive electrodes and external members of the N rechargeable batteries, the controller outputs control signals to the scanner to successively switch to each pair of probes and causes the measuring apparatus to measure the voltage between the selected probes every time switching is performed.

Abstract: A uniformity output device for outputting a uniformity of particles in a slurry, in which an insoluble solid matter is mixed in liquid, includes: a pair of electrodes configured to apply AC voltage to the slurry; a measurement unit configured to measure impedance of the slurry on the basis of the response current flowing through the slurry when AC voltage with changing frequency is applied to the slurry; and a processing unit configured to determine the uniformity by executing a particle equivalent circuit analysis with a parallel circuit formed of a resistor and a capacitor as an element on the basis of the impedance measured by the measurement unit in accordance with the frequency.

Abstract: A clamp sensor includes: a pair of clamp arms that construct a ring-shaped sensor in a closed state and rotate about a rotational shaft provided near base ends of the clamp arms so that other ends of the clamp arms come in to contact and move apart; and a pair of operating arms that extend from the base ends of the clamp arms and are capable, by rotating about the rotational shaft so as to approach each other, of shifting the clamp arms into an open state. The operating arms are formed in arc shapes where, when looking along an axial direction of the rotational shaft, an outer edge of one operating arm and an outer edge of the other operating arm are curved in a same direction.

Abstract: To provide a measuring apparatus that can detect a wide range of capacitance values with high sensitivity.

Abstract: A measurement apparatus detects a voltage change in a power storage device. The measurement apparatus supplies constant current to the power storage device; measures voltage related to the power storage device supplied with the constant current; and detects the voltage change in the power storage device subjected to the measurement. The measurement apparatus also acquires the voltage change in the power storage device based on an electrical property serving as a reference of the power storage device.

Abstract: A current sensor for detecting a magnitude of a current flowing through a measuring object has a magnetic core having a first magnetic core and a second magnetic core that is arranged magnetically in parallel to the first magnetic core, wherein the first magnetic core has a magnetic permeability that is higher than that of the second magnetic core in a first frequency band, and the first magnetic core has a magnetic permeability that is lower than that of the second magnetic core in a second frequency band, the second frequency band being higher than the first frequency band, and the current sensor detects the magnitude of the current in a frequency band that is constituted by combining the first frequency band and the second frequency band.

Abstract: A current sensor includes an excitation detection winding configured such that an excitation signal for exciting a second magnetic core is input, the excitation detection winding detects magnetic flux flowing through the second magnetic core and outputs a detection signal indicating a measurement-target current. The current sensor includes an auxiliary winding that detects the magnetic flux and outputs an auxiliary signal indicating the measurement-target current. The current sensor includes a feedback winding wound around first and second magnetic cores, the feedback winding being configured such that a signal generated from the detection signal is input, and the feedback winding being wound to cancel out magnetic flux of the first and second magnetic cores. The current sensor includes a circuit to output an output signal indicating a level of the measurement-target current by modifying a signal output from the feedback winding based on a correction signal generated from the auxiliary signal.

Abstract: A uniformity property acquisition apparatus is the uniformity property acquisition apparatus configured to acquires a uniformity property of a mixture in which an insoluble solid matter is mixed in liquid, and the uniformity property acquisition apparatus includes: a pair of electrodes configured to apply the AC signal to the mixture; measurement unit configured to measure impedance of the mixture on the basis of a response signal flowing through the mixture when the AC signal is applied to the mixture; and processing unit configured to acquire the uniformity property of the mixture on the basis of the impedance measured by the measurement unit.

Abstract: A waveform shaping circuit includes a capacitor, an impedance element, a switch circuit, and a switch control circuit. Opposite ends of the capacitor are connected to the input and output, respectively. One end of the impedance element supplies a target constant voltage to the output end of the capacitor. The switch circuit has a switch without a diode. When on, the switch applies the target constant voltage to the output. When off, it does not. The switch control circuit switches the switch on during a high voltage period in an AC component of an input pulse signal and switches the switch off during a low voltage period of the AC component. The circuit shapes the input pulse signal into an output pulse signal whose peak-to-peak voltage is equivalent to a peak-to-peak voltage of the AC component and whose voltage during the high voltage period is at the target constant voltage.

Abstract: A measurement device configured to measure a state of a target device that is capable of switching at least one transmission direction of a channel among transmission directions of electric power transmitted through a plurality of channels. The measurement device retains information indicating whether a reference transmission direction of the electric power transmitted to each of the channels is an input direction in which the electric power is input to the target device or an output direction in which the electric power is output from the target device, acquires a signal indicating a direction and intensity of the electric power, and computes at least one of an input electric power and an output electric power of the target device on the basis of the sign indicating the direction of the above-described signal with respect to the reference transmission direction of the electric power of each of the channels.

Abstract: A clamp sensor includes: a pair of clamp arms that construct a ring-shaped sensor in a closed state and rotate about a rotational shaft provided near base ends of the clamp arms so that other ends of the clamp arms come in to contact and move apart; and a pair of operating arms that extend from the base ends of the clamp arms and are capable, by rotating about the rotational shaft so as to approach each other, of shifting the clamp arms into an open state. The operating arms are formed in arc shapes where, when looking along an axial direction of the rotational shaft, an outer edge of one operating arm and an outer edge of the other operating arm are curved in a same direction.

Abstract: A measurement apparatus of a power storage device supplies constant current to the power storage device, measures voltage of the power storage device, and computes an internal state of the power storage device on the basis of voltage change in the power storage device subjected to the measurement.