Abstract: A physical quantity measuring device is configured to measure a physical quantity of a fluid. The physical quantity measuring device includes: at least two humidity detection parts configured to output a humidity signal corresponding to a humidity of the fluid; and an abnormality determination part configured to determine that an abnormality has occurred in the humidity detection parts in response to that a difference between the humidity signals obtained from the two humidity detection parts exceeds an abnormality determination threshold.

Abstract: A gas flow rate measurement device includes a flow rate sensor that outputs a voltage that includes variations due to differences in an external environment and variations due to individual differences, a correction coefficient storage unit that stores a correction coefficient for correcting the output voltage of the flow rate sensor based on a corresponding relationship between the output voltage of the flow rate sensor and the flow rate of the gas, and a correction calculation unit that corrects the output voltage of the flow rate sensor by using the correction coefficient. The correction coefficient is a coefficient for directly converting the output voltage of the flow rate sensor into an ideal voltage value that does not include the variations due to the differences in the external environment and does not include the variations due to the individual differences in the flow rate sensor.

Abstract: A magnetic field detection device includes an IC package, a terminal, a resin mold member. The IC package includes a magnetism detection element, a lead frame located on a first side of the magnetism detection element, and a resin member covering the magnetism detection element and the lead frame. The resin mold member includes a base portion and a head portion. The head portion includes a thickest portion. An outer wall surface of the thickest portion located on a second side of the magnetism detection element is a detection reference surface. An element corresponding surface that is an outer wall surface of the IC package located on the second side is exposed to an outside of resin mold member or covered with a detection side thin portion thinner than a thickness from the element corresponding surface to the detection side reference surface.

Abstract: The present disclosure provides a rotational angle detecting device. An IC substrate has a flat surface extending along a rotational axis of a throttle valve. Yokes forms, together with the magnets, a closed magnetic circuit. A first Hall element outputs a first signal according to the magnetic flux density in a first direction along the flat surface. A second Hall element outputs a second signal according to the magnetic flux density in a second direction intersecting the flat surface. The first and second Hall elements are positioned within a region that is surrounded by the magnets and the yoke and that is between an edge surface and an edge surface.

Abstract: A physical quantity measuring device is configured to measure a physical quantity of a fluid. The physical quantity measuring device includes: at least two humidity detection parts configured to output a humidity signal corresponding to a humidity of the fluid; and an abnormality determination part configured to determine that an abnormality has occurred in the humidity detection parts in response to that a difference between the humidity signals obtained from the two humidity detection parts exceeds an abnormality determination threshold.

Abstract: A method for manufacturing semiconductor devices is provided. The method includes bonding a semiconductor element to a first surface of a planar lead frame, clamping a partial area of the lead frame to hold the lead frame and the semiconductor element in molding dies, and covering at least a part of the lead frame and the semiconductor element with a resin member by resin molding which fills the molding dies with resin. A thin-walled portion having a relative small thickness is previously formed on a shortest virtual line connecting a clamp area of the lead frame to an area where the semiconductor element is bonded.

Abstract: A magnetic field detection device includes an IC package, a terminal, a resin mold member. The IC package includes a magnetism detection element, a lead frame located on a first side of the magnetism detection element, and a resin member covering the magnetism detection element and the lead frame. The resin mold member includes a base portion and a head portion. The head portion includes a thickest portion. An outer wall surface of the thickest portion located on a second side of the magnetism detection element is a detection reference surface. An element corresponding surface that is an outer wall surface of the IC package located on the second side is exposed to an outside of resin mold member or covered with a detection side thin portion thinner than a thickness from the element corresponding surface to the detection side reference surface.

Abstract: A method for manufacturing semiconductor devices is provided. The method includes bonding a semiconductor element to a first surface of a planar lead frame, clamping a partial area of the lead frame to hold the lead frame and the semiconductor element in molding dies, and covering at least a part of the lead frame and the semiconductor element with a resin member by resin molding which fills the molding dies with resin. A thin-walled portion having a relative small thickness is previously formed on a shortest virtual line connecting a clamp area of the lead frame to an area where the semiconductor element is bonded.

Abstract: The present disclosure provides a rotational angle detecting device. An IC substrate has a flat surface extending along a rotational axis of a throttle valve. Yokes forms, together with the magnets, a closed magnetic circuit. A first Hall element outputs a first signal according to the magnetic flux density in a first direction along the flat surface. A second Hall element outputs a second signal according to the magnetic flux density in a second direction intersecting the flat surface. The first and second Hall elements are positioned within a region that is surrounded by the magnets and the yoke and that is between an edge surface and an edge surface.

Abstract: A rotation angle and stroke amount detection device includes a sensor unit, a rotation angle calculation unit, and a stroke amount calculation unit. The sensor unit includes sin and cos sensors which are magnetic sensing elements that detect changes in a magnetic field caused by rotation or linear displacement of a detection target. The sensor unit outputs sin and cos signals based on detection values of the sin and cos sensors. The rotation angle calculation unit calculates a rotation angle of the detection target based on the sin and cos signals output by the sensor unit. The stroke amount calculation unit calculates a stroke amount of the detection target based on the same signals as those used by the rotation angle calculation unit, i.e., the sin and cos signals. Accordingly, the configuration of the sensor unit may be simplified and the physical size of the device may be reduced.

Abstract: A rotation angle detection device includes: a magnetic field generation portion that generates a magnetic field; and a first magnetism detection element and a second magnetism detection element disposed to have an angle of 90° therebetween in a rotation direction of the detection target and to rotate relative to the magnetism generation portion. The first magnetism detection element outputs a first output signal, and the second magnetism detection element outputs a second output signal. An amplitude shift correction circuit matches amplitudes of the first output signal and the second output signal which differ in phase by 90° from each other. A rotation angle computation circuit connected to the amplitude shift correction circuit computes and outputs a rotation angle of a detection target based on the first output signal and the second output signal having matched amplitudes.

Abstract: A first opposing surface of a first yoke has a constant radius of curvature and has a center of curvature that lies on a center of rotation. At least two rotation direction end portions of a second opposing surface of the second yoke are formed such that toward either end in the rotation direction, the two end portions are increasingly spaced away from a reference curved surface in a direction away from the first opposing surface. The first and second opposing surfaces face each other to define a gap thereinbetween. Accordingly, the gap between the yokes is wider at its end portions than at its center, and increases in magnetic flux density flowing through a Hall element is curtailed at the end portions of the gap. Further, it is not necessary for the first yoke to protrude outward when widening the end portions of the gap.

Abstract: A rotation angle detection device includes a magnetic field generation section, a yoke, and a magnetism detection section. The magnetic field generation section has a first end portion and a second end portion. The yoke has such a tube shape that the magnetic field generation section and a rotation axis of a rotating body are located therein. The yoke has a gap at a part in a circumferential direction in a cross section perpendicular to the rotation axis. The magnetism detection section is disposed in the gap and outputs an electrical signal in accordance with a magnetic field strength in the gap. The magnetic field generation section is disposed in such a manner that a magnetic force line passing through the magnetic field generation section passes through the rotation axis regardless of the rotation angle of the rotating body and the rotation axis passes through the first end portion.

Abstract: A position detector includes a Hall element that detects a magnetic flux density and a temperature detection element that detects the temperature of the Hall element. In a rotation angle calculation process, a temperature correction value a is calculated by substituting a detection temperature t of the temperature detection element and a reference maximum voltage V0 at a reference temperature t0 for a=V0×k (t?t0). Next, a correction maximum voltage Vt is calculated by substituting the temperature correction value a for a temperature characteristic formula of Vt=V0+a. Further, a rotation angle ? of a magnet relative to the Hall element is calculated by substituting an output voltage VH of the Hall element and the correction maximum voltage Vt for ?=sin?1 (VH/Vt). Since the correction maximum voltage Vt is corrected according to the temperature, the rotation angle is accurately detected.

Abstract: A rotation angle detection device includes: a magnetic field generation portion that generates a magnetic field; and a first magnetism detection element and a second magnetism detection element disposed to have an angle of 90° therebetween in a rotation direction of the detection target and to rotate relative to the magnetism generation portion. The first magnetism detection element outputs a first output signal, and the second magnetism detection element outputs a second output signal. An amplitude shift correction circuit matches amplitudes of the first output signal and the second output signal which differ in phase by 90° from each other. A rotation angle computation circuit connected to the amplitude shift correction circuit computes and outputs a rotation angle of a detection target based on the first output signal and the second output signal having matched amplitudes.

Abstract: A first opposing surface of a first yoke has a constant radius of curvature and has a center of curvature that lies on a center of rotation. At least two rotation direction end portions of a second opposing surface of the second yoke are formed such that toward either end in the rotation direction, the two end portions are increasingly spaced away from a reference curved surface in a direction away from the first opposing surface. The first and second opposing surfaces face each other to define a gap thereinbetween. Accordingly, the gap between the yokes is wider at its end portions than at its center, and increases in magnetic flux density flowing through a Hall element is curtailed at the end portions of the gap. Further, it is not necessary for the first yoke to protrude outward when widening the end portions of the gap.

Abstract: A rotation angle and stroke amount detection device includes a sensor unit, a rotation angle calculation unit, and a stroke amount calculation unit. The sensor unit includes sin and cos sensors which are magnetic sensing elements that detect changes in a magnetic field caused by rotation or linear displacement of a detection target. The sensor unit outputs sin and cos signals based on detection values of the sin and cos sensors. The rotation angle calculation unit calculates a rotation angle of the detection target based on the sin and cos signals output by the sensor unit. The stroke amount calculation unit calculates a stroke amount of the detection target based on the same signals as those used by the rotation angle calculation unit, i.e., the sin and cos signals. Accordingly, the configuration of the sensor unit may be simplified and the physical size of the device may be reduced.

Abstract: A position detection apparatus includes a magnetic generator, a magnetic detector, a storage, and a rotation angle calculator. The rotation angle calculator calculates a relative rotation angle of the magnetic generator with respect to the magnetic detector based on a voltage output from the magnetic detector and a relational expression of ?=sin?1((VH?c)/V0)?b. In the relational expression, the relative rotation angle is defined as ?, the voltage output from the magnetic detector is defined as VH, a true maximum value of the voltage output from the magnetic detector is defined as V0, a first true correction value is defined as b, and a second true correction value is defined as c.

Abstract: A rotation angle detection device has a first yoke, an inside surface of which is formed of a first concave curved surface and a second concave curved surface, and a second yoke, an inside surface of which is formed of a third concave curved surface and a fourth concave curved surface. Each concave curved surface does not extend in a second direction but extends toward a first flat surface or a second flat surface in an inclined manner. The first flat surface and the second flat surface face each other sandwiching a Hall element therebetween and are parallel to each other. The magnetic flux, which leaks from the first yoke into an inside space and reaches the second yoke, flows in the second direction over a wider area around the Hall element.

Abstract: In a rotation angle detecting device, a signal from a first magnetism detecting element is outputted to a signal output part of a first IC package. A first signal output terminal outputs the signal from the first magnetism detecting element to outside. A signal from a second magnetism detecting element is outputted to a signal output part of a second IC package. A second signal output terminal outputs the signal from the second magnetism detecting element to outside. At least one of a power supply terminal and a ground terminal is located between the first and second signal output terminals. A rotary drive unit includes the device, a motor that rotates a detection object, and a motor power source wire. The ground terminal and a motor power source terminal are adjacent to each other.