Abstract: A static electricity distribution measuring apparatus (1) according to the present disclosure measures the static electricity distribution on a measurement surface of a measurement target (200), and is provided with: an array antenna (2) that receives electric fields generated from each of a plurality of areas (211) on the measurement surface through vibration; a vibrator (3) that vibrates the measurement target (200) or the array antenna (2); a measurer (4) that measures at least one from among intensity, frequency and phase of the electric fields in each of the plurality of areas (211) received by the array antenna (2); a calculator (5) that calculates an amount of static electricity for each of the plurality of areas (211) based on measurement results by the measurer (4); and a drawer (6) that draws the static electricity distribution on the measurement surface based on the amount of static electricity in each of the plurality of areas (211).

Abstract: A static electricity distribution measuring apparatus (1) according to the present disclosure measures the static electricity distribution on a measurement surface of a measurement target (200), and is provided with: an array antenna (2) that receives electric fields generated from each of a plurality of areas (211) on the measurement surface through vibration; a vibrator (3) that vibrates the measurement target (200) or the array antenna (2); a measurer (4) that measures at least one from among intensity, frequency and phase of the electric fields in each of the plurality of areas (211) received by the array antenna (2); a calculator (5) that calculates an amount of static electricity for each of the plurality of areas (211) based on measurement results by the measurer (4); and a drawer (6) that draws the static electricity distribution on the measurement surface based on the amount of static electricity in each of the plurality of areas (211).

Abstract: Light from a light source device is polarized through a polarizer and is caused to impinge obliquely onto an object to be inspected. The resulting scattered light is received by a CCD imaging device having an element for separating scattered polarized light disposed in a dark field. Component light intensities are worked out for an obtained P-polarized component image and an obtained S-polarized component image and a polarization direction is determined as a ratio of them. The component light intensities and the polarization directions are determined from images obtained by imaging of the light scattering entities in a state where static stress is not applied to the object to the inspected and in a state where static load is applied thereto so as to generate tensional stress on the side irradiated by light. The component light intensities and the polarization directions are compared with predetermined threshold values.

Abstract: A static-electricity-quantity measuring apparatus and a static-electricity-quantity measuring method are optimum for a manufacturing site under a difficult-to-measure situation and measure the quantity of static electricity of electronic parts, machine parts, etc. simply with high accuracy. A static-electricity-quantity measuring apparatus of the present invention has: a receiving unit which receives virtual electromagnetic waves generated by vibrations applied to a measured object; a measuring unit which measures at least one of the intensity, frequency, and phase of the virtual electromagnetic waves received by the receiving unit; and a calculating unit which calculates the quantity of static electricity of the measured object based on the measurement result of the measuring unit.

Abstract: Light from a light source device (4) is polarized through a polarizer (5) and is caused to impinge obliquely on an object (W) to be inspected. The resulting scattered light (SB) is received by a CCD imaging device (7) having an element (9) for separating scattered light disposed in a dark field. Component light intensities are worked out for an obtained P-polarized component image and an obtained S-polarized component image and a polarization direction is determined as a ratio of them. The component light intensities and the polarization directions are determined from images obtained by imaging of the light scattering entities in a state where stress is applied to the object to be inspected and in a state where stress is not applied thereto. The component light intensities and the polarization directions are compared with predetermined threshold values.

Abstract: [Problem to be Solved] A static-electricity electrification measurement method and apparatus that satisfy, at the same time, three conditions: (1) to measure static-electricity electrification non-destructively, (2) to reduce environmental influence of a measured object wherein metals and insulators are mixed to measure the static-electricity electrification, and (3) to measure the static-electricity electrification without getting close thereto is provided. [Solution] A static-electricity electrification measurement method of the present invention includes: an adding step of adding vibrations having a vibration frequency and an amplitude selected in advance to a measured object; an intensity measuring step of measuring intensity of electromagnetic waves generated along with the vibrations of the measured object; and a state measuring step of measuring a static-electricity electrification state of the measured object based on intensity of the electromagnetic waves measured in the measuring step.

Abstract: Light from a light source device is polarized through a polarizer and is caused to impinge obliquely onto an object to be inspected. The resulting scattered light is received by a CCD imaging device having an element for separating scattered polarized light disposed in a dark field. Component light intensities are worked out for an obtained P-polarized component image and an obtained S-polarized component image and a polarization direction is determined as a ratio of them. The component light intensities and the polarization directions are determined from images obtained by imaging of the light scattering entities in a state where static stress is not applied to the object to the inspected and in a state where static load is applied thereto so as to generate tensional stress on the side irradiated by light. The component light intensities and the polarization directions are compared with predetermined threshold values.

Abstract: An inverter controller comprising an AC motor as a load. A rectifying circuit converts AC power from an AC power source into DC power. A smoothing capacitor smoothens a DC voltage from the rectifying circuit. An inverter circuit converts DC power supplied via the smoothing capacitor into a desired frequency. A current detection circuit detects a output current of the inverter circuit. A voltage detection circuit detects a terminal voltage (Vpn) of the smoothing capacitor. A voltage command calculation circuit calculates a voltage command to the AC motor. A speed command calculation circuit calculates a speed command to be used when it is determined that the AC power source is in a power failure state or when the terminal voltage (Vpn) reaches a certain value.

Abstract: Light from a light source device (4) is polarized through a polarizer (5) and is caused to impinge obliquely on an object (W) to be inspected. The resulting scattered light (SB) is received by a CCD imaging device (7) having an element (9) for separating scattered light disposed in a dark field. Component light intensities are worked out for an obtained P-polarized component image and an obtained S-polarized component image and a polarization direction is determined as a ratio of them. The component light intensities and the polarization directions are determined from images obtained by imaging of the light scattering entities in a state where stress is applied to the object to be inspected and in a state where stress is not applied thereto. The component light intensities and the polarization directions are compared with predetermined threshold values.

Abstract: The present invention provides an inverter controller and a method for operating the inverter controller, enabling continuous operation without requiring difficult adjustments and without causing a trip or unnecessary torque ripple at overvoltage or undervoltage during an instantaneous power failure or during regenerative operation. An inverter controller (20) equipped with a voltage detection circuit (5) for detecting the terminal voltage of the smoothing capacitor (2) and a speed command selection circuit (6) for detecting an instantaneous power failure in an AC power source has a power calculation circuit (36) for calculating the power output thereof and a speed command calculation circuit (7) for calculating a power output target value and a speed command value during the instantaneous power failure.

Abstract: It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an alternating-current motor in the free running state. According to the present invention, when a current that flows in an alternating-current motor (2) at a restart time 7 the alternating-current motor (2) continuously flows at a designated current level or higher for a designated period of time, it is determined that the rotational direction or the velocity of the alternating-current motor (2) is incorrectly estimated, and a direct current or a direct-current voltage is again applied to again estimate the rotational direction and the velocity.

Abstract: A mechanoluminescence material comprising a matrix of composite metal oxide containing strontium and aluminum, represented by the general formula SrM1Al6O11 (wherein M1 is an alkaline earth metal) or SrM2Al3O7 (wherein M2 is a rare earth metal), and further comprising, as luminescence centers, a metal selected from among rare earth metals and transition metals capable of emitting light when a carrier having been excited by mechanical energy returns to its ground state.

Abstract: A mechanoluminescence material comprising a mother body material and a luminescence center added to the mother body material. The mother body material is constituted of at least one kind of oxide selected from alumino silicate, aluminate, silicate, tantalate, niobate, gallium oxide, and ZrO2, and the luminescence center is at least one kind selected from a rare earth metal and a transition metal which emits light when electrons excited by mechanical energy are restored to a normal state.

Abstract: It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an alternating-current motor in the free running state. According to the present invention, when a current that flows in an alternating-current motor (2) at a restart time 7 the alternating-current motor (2) continuously flows at a designated current level or higher for a designated period of time, it is determined that the rotational direction or the velocity of the alternating-current motor (2) is incorrectly estimated, and a direct current or a direct-current voltage is again applied to again estimate the rotational direction and the velocity.

Abstract: A mechanoluminescence material comprising a matrix of composite metal oxide containing strontium and aluminum, represented by the general formula SrM1Al6O11 (wherein M1 is an alkaline earth metal) or SrM2Al3O7 (wherein M2 is a rare earth metal), and further comprising, as luminescence centers, a metal selected from among rare earth metals and transition metals capable of emitting light when a carrier having been excited by mechanical energy returns to its ground state.

Abstract: This invention is to provide a method and a system which, by making use of a stress luminescent material, renders it possible to directly observe a stress distribution on the base of a real time without electrical contacts, and to easily measure a stress or a stress distribution and a stress image. Essentially, the invention comprises the steps of adding a stress to a tested body containing a stress luminescent material whose light emission is proportional to the stress, making visually observable a stress distribution over the tested body in accordance with a luminous intensity of the stress luminescent material contained in the tested body, measuring the luminous intensity of the luminescent material of the tested body, comparing the measured value of the luminous intensity with certain correlation data indicating a relationship between the luminous intensity of the stress luminescent material and a stress, thereby obtaining a stress value or a stress distribution over the tested body.

Abstract: Disclosed is a high-sensitivity flexible ceramic sensor for detecting mechanical shocks and vibrations, which comprises a metal foil of a specified thickness as a substrate, a single-crystalline thin film of a piezoelectric ceramic material such as aluminum nitride and zinc oxide having a specified thickness formed on the substrate, a metallic electrode formed on the thin ceramic film and an external circuit connecting the metal foil and the electrode with insertion of an electric meter for measuring the piezoelectric voltage changes induced in the ceramic thin film.

Abstract: A mechanoluminescence material of the present invention is produced by adding a luminescence center to a mother body material, wherein: said mother body material is constituted of at least one kind of oxide selected from alumino silicate, aluminate, silicate, tantalate, niobate, gallium oxide, and ZrO2, and said luminescence center is at least one kind selected from a rare earth metal and a transition metal which emits light when electrons excited by mechanical energy are restored to a normal state.

Abstract: Disclosed is a high-sensitivity flexible ceramic sensor for detecting mechanical shocks and vibrations, which comprises a metal foil of a specified thickness as a substrate, a single-crystalline thin film of a piezoelectric ceramic material such as aluminum nitride and zinc oxide having a specified thickness formed on the substrate, a metallic electrode formed on the thin ceramic film and an external circuit connecting the metal foil and the electrode with insertion of an electric meter for measuring the piezoelectric voltage changes induced in the ceramic thin film.

Abstract: Disclosed is a high-sensitivity flexible ceramic sensor for detecting mechanical shocks and vibrations, which comprises a metal foil of a specified thickness as a substrate, a single-crystalline thin film of a piezoelectric ceramic material such as aluminum nitride and zinc oxide having a specified thickness formed on the substrate, a metallic electrode formed on the thin ceramic film and an external circuit connecting the metal foil and the electrode with insertion of an electric meter for measuring the piezoelectric voltage changes induced in the ceramic thin film.