145results about How to "Accurate and stable detection" patented technology

Provided is a highly accurate optical pumping magnetometer, in which a static magnetic field and an oscillating field to be applied to a vapor cell are stabilized. To this end, the optical pumping magnetometer includes: Helmholtz coils for applying a constant static magnetic field to a vapor cell serving as a magnetic field detector; fluxgate magnetometers for detecting environmental magnetic noise in two directions of X-axis direction and Y-axis direction other than Z-axis direction which is a direction for detecting a magnetic field coming out of a measurement object while locating the vapor cell in the center thereof; magnetometer drive circuits for driving the fluxgate magneotometers; current converters for converting outputs of the magnetometer drive circuits into amount of currents; and magnetic field generating coils for generating a magnetic field in a phase opposite to the environmental magnetic noise in the two directions.

Provided is a highly accurate optical pumping magnetometer, in which a static magnetic field and an oscillating field to be applied to a vapor cell are stabilized. To this end, the optical pumping magnetometer includes: Helmholtz coils for applying a constant static magnetic field to a vapor cell serving as a magnetic field detector; fluxgate magnetometers for detecting environmental magnetic noise in two directions of X-axis direction and Y-axis direction other than Z-axis direction which is a direction for detecting a magnetic field coming out of a measurement object while locating the vapor cell in the center thereof; magnetometer drive circuits for driving the fluxgate magneotometers; current converters for converting outputs of the magnetometer drive circuits into amount of currents; and magnetic field generating coils for generating a magnetic field in a phase opposite to the environmental magnetic noise in the two directions.

A transfer point of a transfer arm is detected accurately and stably by using a position detecting wafer having an electrostatic capacitance sensor. A position detecting wafer S is formed in a wafer shape transferable by a transfer arm 20 and includes an electrostatic capacitance sensor 50 for detecting a relative position with respect to a reference object by detecting an electrostatic capacitance in relation with the reference object for a position detection. The electrostatic capacitance sensor 50 includes a detection electrode 52 for forming the electrostatic capacitance in relation with the reference object, and the detection electrode 52 is installed on a rear surface of a main body of the wafer shape. Installed on the main body is a guard electrode 100 covering the detecting electrode 52 when viewed from a front surface thereof, for blocking an electric field oriented toward the detection electrode 52 from the front surface.

The invention relates to a detection instrument for the bonding strength of a ferromagnetic coating of remanufactured parts. The detection instrument comprises a load driving mechanism, a control device, a detection device and a supporting mechanism, wherein the load driving mechanism comprises a servo motor as a power device, a transmission mechanism, and a pressure head assembly connected with the transmission mechanism, the servo motor is arranged on one end surface of a driving mechanism shell, the transmission mechanism comprises a screw and a nut moving sleeve, the screw is connected with the servo motor, and a pressure spring, a pressure-bearing annular washer and a force transducer are sequentially arranged on one side of the nut moving sleeve; one side of the force transducer is adjoined with a pressure head seat, the pressure head assembly is embedded in the pressure head seat, a pressure head is embedded in the tip end of the pressure head assembly, and the nut moving sleeve and the pressure-bearing annular washer are arranged in the driving mechanism shell in a peripheral fixed axial sliding manner; the detection device comprises the force transducer, a magnetic memory probe on a loading platform, and a magnetic memory signal acquisition device; the control device controls the servo motor to run. The detection instrument has the advantages of being simple in structure, and accurate and stable in detection.

A guide pipe is formed from a metal material, and its internal cross section has a circular shape whose diametric dimension gradually becomes smaller with a distance from an ultrasonic sensor. That is, the guide pipe is formed so that a route for transmitting an ultrasonic wave generated from the ultrasonic sensor may be tapered from this ultrasonic sensor toward a reflector plate. Thus, the acoustic pressure level of the ultrasonic wave which enters the reflector plate can be made higher than a value in a prior-art liquid level detecting apparatus. Accordingly, the energy of the ultrasonic wave generated from the ultrasonic sensor can be utilized for liquid level detection at a high efficiency, so that a fuel liquid level detecting apparatus capable of accurate liquid level detection can be provided.

In a belt apparatus used for image formation structured such that processing unit used for image formation are placed around a belt extended between at least two rollers and at least one of the processing unit acts on a roller so as to impart a rotational load thereto, it is possible to avoid a reduction in the image quality of a transfer image on the belt caused by the roller that supports the belt receiving variations in the load due to the movement towards or away from the belt of a cleaning blade. A drive source is connected to the roller to which directly receiving the load variation making this roller the drive roller for the belt.

The invention discloses a fluorescence immunochromatographic kit for quantitative joint detection of four urinary micro proteins and a preparation method thereof, which solves the problems that the detection of urinary micro proteins in clinical detection cannot be simultaneously carried out. A fluorescence immunochromatographic kit for quantitative joint detection of four urinary micro proteins comprises an immunochromatographic strip coated with an albumin capture antibody, an alpha 1-microglobulin capture antibody, a transferrin capture antibody, a beta 2-microglobulin capture antibody anda protein A, and a fluorescent microsphere labeled antigen solution including a fluorescent microsphere labeled albumin solution, a fluorescent microsphere labeled alpha 1-microglobulin solution, a fluorescent microsphere labeled transferrin solution and a fluorescent microsphere labeled beta 2-microglobulin solution; and fluorescent microspheres are also labeled with IgG immunoglobulin. The invention has the advantages of rapid detection and the like.

A height position of a surface of a wafer can be detected accurately and stably without being affected by variation in a thin film formed on the surface of the wafer. An AF (autofocus) device irradiates the surface of the wafer W with an AF laser beam, detects reflection light thereof for each wavelength with a detection optical system. An AF signal processing unit outputs a displacement signal indicating displacement of the surface of the wafer to a control unit on the basis of a detection result of the detection optical system. Moreover, the AF device includes a focus optical system disposed in an irradiation optical path which is an optical path from the light source unit to a light converging lens. The focus optical system adjusts a light converging point of the AF laser beam in a wafer thickness direction.

An in-situ analyzer for nutritive salt and a nutritive salt content analyzing method are disclosed. The analyzer includes a microprocessor, drive components, a multi-ported valve, an injector, a colorimetric detector, a mixing ring, a sample pipeline, a pure water bin, a standard solution bin and various agent bins. The injector, the colorimetric detector, the mixing ring, the sample pipeline, thepure water bin, the standard solution bin and various agent bins are correspondingly connected to ports of the multi-ported valve. The microprocessor is connected to a first motor driver and a firstmotor in order and is then connected to an injection pump of the injector. The microprocessor is connected to a second motor driver and a second motor in order, is then connected to the multi-ported valve, and controls a multi-ported valve port connected to the injector and other ports in the multi-ported valve to be communicated in order. The colorimetric detector is connected to the microprocessor. The analyzer can achieve continuous automatic sampling and nutritive salt content analysis, can achieve on-line analysis of a plurality of components, and has advantage of a simple structure, powerful functions, high applicability and high reliability.

The invention discloses a method and device for detecting a flame. The method comprises the following steps: a candidate flame area in a current frame image is determined; the candidate flame area is subjected to real-time light stream calculation according to a grid algorithm to acquire light stream vectors of pixels in the candidate flame area; whether the flame exists is determined according to the distribution characters of the light stream vectors of the pixels in the candidate flame area in all directions. By means of the method and device for detecting the flame, flames can be detected accurately and stably in various complex or simple environments.

A guide pipe is formed from a metal material, and its internal cross section has a circular shape whose diametric dimension gradually becomes smaller with a distance from an ultrasonic sensor. That is, the guide pipe is formed so that a route for transmitting an ultrasonic wave generated from the ultrasonic sensor may be tapered from this ultrasonic sensor toward a reflector plate. Thus, the acoustic pressure level of the ultrasonic wave which enters the reflector plate can be made higher than a value in a prior-art liquid level detecting apparatus. Accordingly, the energy of the ultrasonic wave generated from the ultrasonic sensor can be utilized for liquid level detection at a high efficiency, so that a fuel liquid level detecting apparatus capable of accurate liquid level detection can be provided.