Abstract: An element array circuit includes one or more first wiring lines, second wiring lines, impedance elements, one or more operational amplifiers, one or more conversion elements, and one or more switchers. The second wiring lines each extend in a direction different from a direction of extension of the first wiring lines. The impedance elements are each coupled to one each of the first and second wiring lines. The operational amplifiers each include a positive input terminal, a negative input terminal couplable to one of the second wiring lines, and an output terminal. The conversion elements are each coupled to the negative input terminal and the output terminal, and each convert a current flowing through the second wiring line coupled to the negative input terminal into a voltage. The switchers are each coupled to one of the conversion elements and come into a conducting state or a nonconducting state.

Abstract: Electromagnetic wave sensor (infrared sensor) 1 has: a first substrate; a second substrate that faces the first substrate and that allows infrared rays to pass through at least a part of the second substrate; first circumferential wall 4a that is positioned between the first substrate and the second substrate and that forms first space 8a together with the first and second substrates; bolometer structures 7 that are provided in first space 8a; first measuring element 9a that is provided in first space 8a and that is used for taking a first measurement relating to pressure P1 in first space 8a; and a monitoring portion. The monitoring portion acquires the first measurement that is taken using first measuring element 9a and outputs a predetermined signal indicating an abnormality based on at least the first measurement.

Abstract: Provided is a measuring device capable of enhancing convenience. The measuring device 1 comprises a first sensor 2 provided on a surface of an object 11 to be measured, an elastic body 3 that clamps the first sensor 2 between the elastic body 3 and the object 11 to be measured, a protective sheet 4 provided on the surface of the elastic body 3 on the side of the object 11 to be measured, a case 5 provided on the surface of the elastic body 3 on a side opposite from the object 11 to be measured, and a processing circuit 8 which is provided inside the case 5 and processes an output signal from the first sensor 2. The first sensor 2 is provided between the elastic body 3 and the protective sheet 4. The first sensor 2 is a strain sensor and includes a thin film piezoelectric element. The elastic body 3 is made of foamed rubber.

Abstract: A tire attaching position detection system is provided which can suppress influence by an intensity of a reception signal from a tire. In the system, a sensor unit is mounted on each tire, the sensor unit has a geomagnetic sensor for acquiring data on direction change of the tire, a distortion sensor for acquiring data on number of rotations of the tire and a transmitting part for transmitting the direction change data and number of rotations data of the tire. A calculation part of a user terminal judges the attaching position of each tire based on the direction change data and the number of rotations data of each tire transmitted from the transmitting part.

Abstract: A tire deterioration detection system, a tire wear detection system and a tire wear detection method can suppress influences caused by curving of a vehicle. The tire deterioration detection system estimates deterioration state, for example, wear state of each tire of a vehicle. A calculation part derives a moving length of each tire in view of an effect caused by curving based on a traveling path of the vehicle obtained from position data by a GPS receiver and an outer diameter of the tire from the moving length of the tire, so that calculation part derives a wear loss of the tire and estimate the wear state of the tire from the wear loss of the tire.

Abstract: A wireless power receiving device includes a voltage detection unit that detects an output voltage value of a rectifying unit, a power reduction unit that includes a switching element connected to a charging unit in parallel, and a control unit that controls operations of the switching element. In a case where the output voltage value detected by the voltage detection unit exceeds a first reference voltage value set in advance, the control unit controls and turns the switching element on by applying a voltage to the switching element, and controls the value of the voltage to be applied to the switching element so that the difference between the voltage value calculated on the basis of a current flowing in the switching element and a second reference voltage value set in advance decreases.

Abstract: A wireless power receiving device includes a voltage detection unit that detects an output voltage value of a rectifying unit, a power reduction unit that includes a switching element connected to a charging unit in parallel, and a control unit that controls operations of the switching element. In a case where the output voltage value detected by the voltage detection unit exceeds a first reference voltage value set in advance, the control unit controls and turns the switching element on by applying a voltage to the switching element, and controls the value of the voltage to be applied to the switching element so that the difference between the voltage value calculated on the basis of a current flowing in the switching element and a second reference voltage value set in advance decreases.

Abstract: A number of cells can be determined before control for a battery without providing cell number setting and input means. The cell number determination device comprises voltage measuring units that select an “i”th cell among cells that are connected in series and that configure a battery, and that measure a voltage value between a terminal in which the “i”th cell and an (i?1)th cell, which is in one location higher than the “i”th cell, are connected and a ground potential line, voltage comparators that determine an existence, nonexistence or normality of the cells by comparing a voltage value of an (i+1)th cell that is in one location lower than the “i”th cell with the voltage value of the “i”th cell measured by the voltage measuring units and a cell number determination unit that determines a number of assembled cells and normal cells and cell assembled locations in the battery.

Abstract: A reusable period of a battery can be maintained for a long time by recharging while avoiding abnormal heating of the battery due to over discharge. A battery protection circuit comprises a control part that cuts off a discharge switch which is a discharge path to a load for a battery when a voltage value of the battery is equal to or less than a first threshold value, or when the voltage value of the battery is less than the first threshold value, wherein the control part cuts off a power switch as a power supply path to the control part itself when the voltage value of the battery is equal to or less than a second threshold value, or when the voltage value of the battery is less than the second threshold value which is lower than the first threshold value.

Abstract: A power supply control device for controlling power supply to a pair of terminals to which a load is connected, comprising a voltage measuring part for measuring a voltage which has a predetermined relationship with the voltage of the pair of terminals, a short circuit detecting part for detecting whether a short circuit exists between the pair of terminals based on the measured voltage and for making power supply to the pair of terminals stop when existence of a short circuit is detected, and a constant current supplying part for supplying a constant current though the pair of terminals; wherein the short circuit detecting part is configured to detect that the previously detected short circuit is eliminated when the voltage measured by the voltage measuring part is equal to or greater than a predetermined threshold value upon supplying the constant current through the pair of terminals.

Abstract: A power supply control device for controlling power supply to a pair of terminals to which a load is connected, comprising a voltage measuring part for measuring a voltage which has a predetermined relationship with the voltage of the pair of terminals, a short circuit detecting part for detecting whether a short circuit exists between the pair of terminals based on the measured voltage and for making power supply to the pair of terminals stop when existence of a short circuit is detected, and a constant current supplying part for supplying a constant current though the pair of terminals; wherein the short circuit detecting part is configured to detect that the previously detected short circuit is eliminated when the voltage measured by the voltage measuring part is equal to or greater than a predetermined threshold value upon supplying the constant current through the pair of terminals.

Abstract: A number of cells can be determined before control for a battery without providing cell number setting and input means. The cell number determination device comprises voltage measuring units that select an “i”th cell among cells that are connected in series and that configure a battery, and that measure a voltage value between a terminal in which the “i”th cell and an (i?1)th cell, which is in one location higher than the “i”th cell, are connected and a ground potential line, voltage comparators that determine an existence, nonexistence or normality of the cells by comparing a voltage value of an (i+1)th cell that is in one location lower than the “i”th cell with the voltage value of the “i”th cell measured by the voltage measuring units and a cell number determination unit that determines a number of assembled cells and normal cells and cell assembled locations in the battery.

Abstract: A reusable period of a battery can be maintained for a long time by recharging while avoiding abnormal heating of the battery due to over discharge. A battery protection circuit comprises a control part that cuts off a discharge switch which is a discharge path to a load for a battery when a voltage value of the battery is equal to or less than a first threshold value, or when the voltage value of the battery is less than the first threshold value, wherein the control part cuts off a power switch as a power supply path to the control part itself when the voltage value of the battery is equal to or less than a second threshold value, or when the voltage value of the battery is less than the second threshold value which is lower than the first threshold value.

Abstract: A temperature detection circuit includes a temperature dependent voltage generation circuit for generating a temperature dependent voltage VR, a bandgap circuit for generating a temperature independent voltage VBG, and a comparator for comparing the temperature dependent voltage VR generated in the temperature dependent voltage generation circuit with the temperature independent voltage VBG generated in the bandgap circuit, and based on the above comparison result, outputting a temperature detection signal which indicates the high-low relationship between the temperature dependent voltage VR and the temperature independent voltage VBG.

Abstract: A voltage-frequency conversion apparatus which comprises a variable current source for charging a capacitor; a current amount adjustment circuit which has a first resistor for applying a first voltage and a second resistor for applying a second voltage and adjusts the amount of a current from the variable current source to be corresponding to a differential voltage between the first voltage and the second voltage; a comparator that compares a charging voltage across the capacitor and a reference voltage; and a discharge circuit that discharges the capacitor when the charging voltage exceeds the reference voltage. The comparator generates a frequency signal according to the differential voltage.

Abstract: A voltage-frequency conversion apparatus which has a variable current source for charging a capacitor; a current amount adjustment unit that adjusts a current amount of the variable current source for charging the capacitor to be corresponding to a differential voltage between a first voltage and a second voltage; a comparator that compares in level a charging voltage produced at one end of the capacitor and a reference voltage; a discharge unit that discharges the charging voltage of the capacitor according to the comparison result of the comparator when the charging voltage exceeds the reference voltage; and a reference voltage fluctuation unit that makes the reference voltage fluctuate. A frequency signal is generated from the comparator corresponding to the differential voltage between the first voltage and the second voltage.

Abstract: A temperature detection circuit includes a temperature dependent voltage generation circuit for generating a temperature dependent voltage VR, a bandgap circuit for generating a temperature independent voltage VBG, and a comparator for comparing the temperature dependent voltage VR generated in the temperature dependent voltage generation circuit with the temperature independent voltage VBG generated in the bandgap circuit, and based on the above comparison result, outputting a temperature detection signal which indicates the high-low relationship between the temperature dependent voltage VR and the temperature independent voltage VBG.

Abstract: A voltage-frequency conversion apparatus which comprises a variable current source for charging a capacitor; a current amount adjustment circuit which has a first resistor for applying a first voltage and a second resistor for applying a second voltage and adjusts the amount of a current from the variable current source to be corresponding to a differential voltage between the first voltage and the second voltage; a comparator that compares a charging voltage across the capacitor and a reference voltage; and a discharge circuit that discharges the capacitor when the charging voltage exceeds the reference voltage. The comparator generates a frequency signal according to the differential voltage.

Abstract: A voltage-frequency conversion apparatus which has a variable current source for charging a capacitor; a current amount adjustment unit that adjusts a current amount of the variable current source for charging the capacitor to be corresponding to a differential voltage between a first voltage and a second voltage; a comparator that compares in level a charging voltage produced at one end of the capacitor and a reference voltage; a discharge unit that discharges the charging voltage of the capacitor according to the comparison result of the comparator when the charging voltage exceeds the reference voltage; and a reference voltage fluctuation unit that makes the reference voltage fluctuate. A frequency signal is generated from the comparator corresponding to the differential voltage between the first voltage and the second voltage.