32results about How to "Strong measurement accuracy" patented technology

The invention provides a weak light signal spectrum fast measuring device and method. On the basis of a light source spectrum power distribution test method of a light splitting type spectrum measurement system, a face array CCD (charge coupled device) is adopted for replacing an original line array CCD, tiny light signals can simultaneously complete multiple times of measurement, the intensity of output signals can be improved through the processing on measuring results, meanwhile, the random noise is eliminated, and the fast measurement of the tiny light signal spectrum power distribution is realized. The weak light signal spectrum fast measuring method has the advantages that the measurement speed is high, the precision is high, the operation is simple, the universality is high, and the technical support is provided for the spectrum test of other kinds of spectrum instruments.

Provided in the invention is a fiber type ultra-high-temperature pressure sensor with the temperature compensation function. The ultra-high-temperature pressure sensor comprises a sensor chip; a signal output of the sensor chip is connected with a high-temperature-resistant fiber; and the sensor chip is installed in a sensor probe. The high-temperature-resistant fiber passes through a packaging board and a fiber casing tube; the fiber casing tube is connected to the packaging board; and packaging of the sensor chip and the high-temperature-resistant fiber is realized by connection of the packaging board and the sensor probe. The sensor chip consists of a pressure-sensitive film and a sensor chip substrate that are combined by thermocompression bonding. A circular concave cavity is formed in the center of the sensor chip substrate; the front side of the pressure-sensitive film is roughened to form a non-smooth surface; and a light reflection film is formed in an area, facing the circular concave cavity, of the back side of the pressure-sensitive film. According to the invention, the ultra-high-temperature pressure sensor is resistant to the ambient temperature of 1000 DEG C and hasthe temperature compensation function; and the influence on the pressure measurement accuracy by the ambient temperature change can be eliminated effectively. The fiber type ultra-high-temperature pressure sensor has characteristics of small size, good corrosion resistance performance and high precision.

A random code external modulation distributive-type optical-fiber sensing method comprises the following steps of dividing a beam of continuous laser with the linear width being smaller than or equal to 100kHz into two paths of light after being externally modulated to be random-code laser, wherein one path of the light is used as reference light, and the other path is used as detection light to be transmitted to a sensing optical fiber; and adopting a correlation method to process Brillouin scattered light and reference light, which are scattered backwards by the sensing optical fiber, after being converted to an electric signal, and acquiring the information containing the temperature variation and stress distribution in the optical fiber to be measured. A random code external modulation distributive-type optical-fiber sensing device comprises a laser transmitting device, and a light splitting device, a detection optical fiber device, a photoelectric conversion device and a signal collection processing display device, which are arranged on a light emitting path of the laser transmitting device. Due to the adoption of the random code external modulation distributive-type optical-fiber sensing method and device, contradiction among the positioning precision, temperature and stress measuring precision of the existing distributive-type optical-fiber sensor can be solved, and long-distance and high-resolution temperature and stress measurement can be realized.

The invention discloses an absolute linear displacement sensor based on decimal shift coding. The absolute linear displacement sensor based on decimal shift coding comprises a light emitting component, a movable ruler base, a fixed ruler base, a photoelectric detector and a signal processing circuit; an absolute code channel and an incremental code channel are on the movable ruler base; decimal shift codes are engraved on the absolute code channel; uniformly distributed rectangular light transmission surfaces I are engraved on the incremental code channel; light emitted by the light emitting component can form a light intensity alternative illumination area acting on the absolute code channel and the incremental code channel; a long strip-shaped light transmission surface and four sets oflight transmission surfaces are on the fixed ruler base, and arranged according to a specific space position; after an electric signal reflecting the absolute position output by the photoelectric measuring head of the photoelectric detector is processed, an absolute position value is obtained; after four light current signals reflecting incremental displacement are processed, an incremental displacement value is obtained; and the absolute position value is added with the incremental displacement value, so that an absolute linear displacement value is obtained. According to the absolute lineardisplacement sensor based on decimal shift coding disclosed by the invention, the absolute linear displacement can be precisely measured; the graph coding difficulty can be reduced; and the measurement reliability can be improved.

The invention relates to a device for measuring liquid sloshing force, which belongs to the technical fields of shipbuilding and ocean engineering, and experiment testing. This device for measuring liquid sloshing force includes a force-measuring frame and a liquid cabin mechanism. The force-measuring frame includes a rectangular force-measuring frame mechanism, a pocket frame mechanism, a rotating shaft mechanism and a force-measuring mechanism. The liquid cabin mechanism is placed in the pocket frame mechanism, and the pocket frame The mechanism is connected to the rectangular force-measuring frame mechanism through the rotating shaft mechanism, and the force-measuring mechanism is connected to the rectangular force-measuring frame mechanism and the pocket frame mechanism. The device has the characteristics of light weight, simple structure, convenient combination, convenient operation, high measurement accuracy and strong versatility. This device for measuring liquid sloshing force can be placed on the swaying excitation platform for use. When a certain amount of liquid is filled in the liquid chamber mechanism, the swaying excitation platform shakes, causing the liquid in the liquid chamber mechanism to slosh, and the liquid sloshing force passes through the pocket frame. The mechanism is transmitted to the force measuring mechanism, and the tension meter can measure parameters such as liquid sloshing force.

The invention relates to a supersonic measuring sensor for a water meter, a heat meter and a flowmeter and a using method of the sensor, and belongs to the field of acoustic and sensing technologies. A measuring tube segment is composed of a butt clamp body (6) and a guiding beam pipe (7), the guiding beam pipe is arranged at one side of the butt clamp body instead of being arranged at the two sides of the butt clamp body symmetrically or asymmetrically, a sensor installation hole (5) is arranged in the guiding beam pipe, and the supersonic sensor is arranged in the sensor installation hole (5); and the guiding beam pipe is internally provided with a reflector which matches the supersonic sensor. According to the invention, the guiding beam pipe is arranged at one side of the butt clamp body, so that the difficulty in onsite installation is reduced greatly, and an instrument is protected effectively against damage in the installation process; and the measuring tube segment is free of a flange connecting piece, so that the appearance and structure are simple, the installation size is small, no movable parts are included, a dead lock preventive mechanism is not needed, and the measuring sensor can be widely applied to supersonic liquid metering in the water meter, the heat meter and the flowmeter.

The invention discloses a method and a device for tracking the sun by a solar panel. The method comprises the following steps of: 1) determining an optimal placing dip angle of a light intensity sensor used for testing, arraning the light intensity sensor on a test plate, rotating the light intensity sensor used for testing for 180 degrees in an east-west vertical plane or a south-north vertical plane by starting from the fact that the test plate is vertical to the ground plane on the test plate, recording a light intensity value and a corresponding angle value in the rotating process, making a difference between the light intensity values of adjacent items to obtain a point with the maximum difference value, taking the point as a jump point of the light intensity, taking an angle corresponding to the jump point as an optimal placing dip angle of the light intensity sensor used for testing, and according to the optimal placing dip angle, fixing the light intensity sensor used for testing; and 2) on the basis of the light intensity sensor used for testing, which is arranged on a surface plate, executing an automatic light following step, and regulating the dip angle of the surface plate to enable the surface plate to track the sun in real time. The method and the device for tracking the sun by the solar panel have the advantages of high precision and easiness in implementation.

The invention relates to coal-rock interface recognition technology in unmanned mining of thin coal seams, in particular to an ultra-wideband chaotic radar based coal-rock interface recognition device for thin coal seams. The ultra-wideband chaotic radar based coal-rock interface recognition device for the thin coal seams comprises a transmitter, transmitting and receiving antennas, a two-channel receiver, a data acquisition module, a signal processing module, a communication module and an intrinsic safety power source. The transmitter comprises an ultra-wideband chaotic signal generator, a first band-pass filter, a first power divider and a power amplifier. The transmitting and receiving antennas include a transmitting antenna and a receiving antenna. The two-channel receiver comprises a second band-pass filter, a third band-pass filter, a low-noise amplifier, an IQ demodulator and an intrinsic signal generator. The ultra-wideband chaotic radar based coal-rock interface recognition device for the thin coal seams is applicable to unmanned mining of the thin coal seams and solves the problems of limited application range, poor utilization safety, low measurement precision, low resolution, poor anti-jamming capability and poor electromagnetic compatibility of existing coal-rock interface recognition devices.

The invention discloses a smart cup mat which comprises a control module, a weighing and acquiring module, a water cup communication interface, a charging management module, a battery, a USB charging interface, a wireless charging interface and a wireless data transmission module. The weighing and acquiring module acquires and converts weight information of a water cup into digital quantity information and transmits the information to the control module, the water cup communication interface acquires and transmits water quality parameters and water volume information to the control module, the control module corrects the weight information of the water cup according to the water volume information, the charging management module is connected with the control module, the USB charging interface is connected with the charging management module and used for charging the battery in a wired mode, the wireless charging interface is connected with the charging management module and charges the battery in a wireless mode, and the control module performs information interaction with the wireless data transmission module. The cup mat measurement accuracy can be improved, inconvenience and danger in the charging process can be avoided, and ductility is stronger.