Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.

Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.

Abstract: A vane pump is provided with: a pump housing having an accommodating concave portion; and a pump cartridge accommodated in the accommodating concave portion, wherein the pump cartridge has: a rotor; a plurality of vanes received in a plurality of slits formed in the rotor; a cam ring formed with a cam face on an inner circumference of the cam ring; and a first side plate provided at the opposite side from a bottom surface of the accommodating concave portion such that the cam ring is located therebetween, the first side plate has a first projected portion projected radially outward, and the pump cartridge is anchored to the pump housing via the first projected portion.

Abstract: In a resonance generation method, a Ramsey resonance is generated by repeating a first period and a second period. In the first period, an atomic cell, in which an alkali metal atom is accommodated and a hydrocarbon film is disposed on an inner wall, is irradiated with light having a first intensity while sweeping a center frequency within a sweep range, and a center frequency of light with which the atomic cell is to be irradiated in a next first period is determined based on a light intensity signal obtained by detecting light transmitted through the atomic cell. In the second period, an intensity of light incident on the atomic cell is reduced as compared with the first intensity.

Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.

Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.

Abstract: In a resonance generation method, a Ramsey resonance is generated by repeating a first period and a second period. In the first period, an atomic cell, in which an alkali metal atom is accommodated and a hydrocarbon film is disposed on an inner wall, is irradiated with light having a first intensity while sweeping a center frequency within a sweep range, and a center frequency of light with which the atomic cell is to be irradiated in a next first period is determined based on a light intensity signal obtained by detecting light transmitted through the atomic cell. In the second period, an intensity of light incident on the atomic cell is reduced as compared with the first intensity.

Abstract: An atomic oscillator includes an atom cell that includes walls defining an internal space in which alkali metal atoms are contained, a light emitting element that emits light for exciting the alkali metal atoms, and a light detecting element that detects the light transmitted through the atom cell, in which the atom cell includes a first portion in which gaseous alkali metal atoms are contained and through which light from the light emitting element passes along an x-axis, a second portion in which liquid or solid alkali metal atoms are contained, and a third portion that is positioned between the first portion and the second portion and couples the first portion and the second portion, and in the third portion, a distance between two walls facing each other along a y-axis orthogonal to the x-axis decreases from the first portion toward the second portion along the y-axis at a constant decrease rate.

Abstract: A timing signal output device includes a receiver configured to output a reference signal on the basis of satellite signals received from a plurality of positioning satellites, an oscillator configured to output a clock signal, and a processor configured to switch, on the basis of statistical value information concerning a statistical value obtained by performing statistical processing of elevation angles of the plurality of positioning satellites, a first mode for generating a timing signal based on the reference signal and a second mode for generating a timing signal based on the clock signal.

Abstract: A frequency signal generation device includes a substrate, a light source that is disposed on a surface of the substrate, and an atom cell that is disposed on the surface of the substrate. The atom cell contains gaseous alkali metal atoms and includes a first portion through which light emitted from the light source passes, a second portion housing a liquid alkali metal atom, and a third portion which connects the first portion to the second portion. A marker is provided that indicates a direction in which the liquid alkali metal atoms move to the third portion by gravity when the surface is vertically oriented.

Abstract: An atomic oscillator includes: a light emitting element; a temperature control element that controls a temperature of the light emitting element; an atomic cell which is irradiated with a light from the light emitting element and in which an alkali metal atom is contained; a light detection element that detects a light transmitted through the atomic cell; an oscillator that outputs an oscillation signal; a wave detection circuit that detects a wave of a signal, which is based on an output of the light detection element, using the oscillation signal of the oscillator, and outputs a wave detection signal; and a drive circuit that includes a constant current circuit generating a current of a specified value for driving the light emitting element and superimposes a modulation current, which is based on the oscillation signal of the oscillator, on the current to output a drive current to the light emitting element.

Abstract: An atomic oscillator includes an atom cell that includes walls defining an internal space in which alkali metal atoms are contained, a light emitting element that emits light for exciting the alkali metal atoms, and a light detecting element that detects the light transmitted through the atom cell, in which the atom cell includes a first portion in which gaseous alkali metal atoms are contained and through which light from the light emitting element passes along an x-axis, a second portion in which liquid or solid alkali metal atoms are contained, and a third portion that is positioned between the first portion and the second portion and couples the first portion and the second portion, and in the third portion, a distance between two walls facing each other along a y-axis orthogonal to the x-axis decreases from the first portion toward the second portion along the y-axis at a constant decrease rate.

Abstract: A timing signal generation device includes: an output terminal that outputs a standard signal; a first standard signal generation unit that generates a first standard signal based on a reference signal input from outside; a second standard signal generation unit that generates a second standard signal based on a signal output from an oscillator; and a control unit that switches the standard signal output from the output terminal from the first standard signal to the second standard signal based on prior information indicating that accuracy of the reference signal deteriorates.

Abstract: A timing signal generation device includes a GPS receiver, an atomic oscillator, a phase comparator, a frequency abnormality determination unit, a sensor unit, and a determination unit. The GPS receiver outputs 1 PPS. The atomic oscillator 30 outputs a clock signal for synchronization with 1 PPS. The phase comparator compares 1 PPS and the clock signal in phase. The frequency abnormality determination unit determines whether or not the frequency of the clock signal is abnormal, by using a comparison result of the phase comparator, and outputs frequency abnormality information including a determination result. The sensor unit detects environment information which has an influence on the comparison result. The determination unit determines a cause of the abnormality by using the frequency abnormality information and the environment information.

Abstract: An atomic oscillator includes: an atomic cell in which alkali metal atoms are sealed; a light source that radiates first light and second light with different frequencies to the atomic cell; a light detector that detects the first light and the second light transmitted through the atomic cell and outputs a detection signal according to a detection intensity; a signal generator that generates a microwave signal according to a transition frequency between two ground levels of the alkali metal atoms based on a result obtained by detecting the detection signal for each first period; and a light source adjuster that adjusts the frequencies of the first light and the second light for each second period, the second period being longer than the first period.

Abstract: An atomic oscillator includes: a light emitting element; a temperature control element that controls a temperature of the light emitting element; an atomic cell which is irradiated with a light from the light emitting element and in which an alkali metal atom is contained; a light detection element that detects a light transmitted through the atomic cell; an oscillator that outputs an oscillation signal; a wave detection circuit that detects a wave of a signal, which is based on an output of the light detection element, using the oscillation signal of the oscillator, and outputs a wave detection signal; and a drive circuit that includes a constant current circuit generating a current of a specified value for driving the light emitting element and superimposes a modulation current, which is based on the oscillation signal of the oscillator, on the current to output a drive current to the light emitting element.

Abstract: A quantum interference device includes a base having a mounting surface, an atom cell in which alkali metal atoms are encapsulated, a light source adapted to emit light adapted to excite the alkali metal atoms, a photodetector adapted to detect the light having been transmitted through the atom cell, and a support adapted to support the atom cell, the light source, and the photodetector in a lump with respect to the mounting surface in a state in which the atom cell, the light source, and the photodetector are arranged in a direction along the mounting surface.

Abstract: A vane pump includes a pump rotor having a through hole to which a driving shaft is coupled, a pump housing configured to accommodate the pump rotor and the cam ring, and a first side plate provided between the pump rotor and a bottom surface of the pump housing. The first side plate or the pump housing is formed with a projection, the projection is inserted into the through hole of the pump rotor.

Abstract: A quantum interference device includes an atomic cell, a light source, a light detector, a package, and a reflective portion. The atomic cell has alkali metal atoms disposed within, and the light source emits light to excite the alkali metal atoms in the atomic cell. The light detector detects light transmitted through the atomic cell. The package defines an internal space and houses at least the light source. The reflective portion is provided between an inner surface of the package and the light source, and has reflectance to an electromagnetic wave having a wavelength of 4 ?m, where the reflectance is greater than or equal to 50%.

Abstract: An atomic cell is filled with an alkali metal therein and includes an inner wall which is formed from a material containing a compound having a polar group, a first coating layer which coats the inner wall and is formed from a first molecule having a nonpolar group and a functional group that undergoes an elimination reaction with the polar group, and a second coating layer which coats the first coating layer and is formed from a nonpolar second molecule, wherein the second molecule is polypropylene, polyethylene, or polymethylpentene.