36results about How to "Reflect authenticity" patented technology

The invention provides a temperature experiment based fiber ring characteristics testing system, which is composed of a wide-spectrum light source for high-precision fiber gyroscope (1), a polarization-maintaining coupler (2), Y-shaped waveguides (3,4), a fiber ring to be tested (5), a quick temperature control testing box (6), high-sensitivity optical power meters (7,8,9), computer and software (10.11, 12) for data reception of computer serial port or GPIB port. The invention provides a fiber ring characteristics testing method without circuit matching based on temperature excitation experiment, which comprises: reflecting the influence of temperature change to optical signal polarization according to change of output power polarized by the Y-shaped waveguide, detecting symmetry of outputsignal at two ends of the fiber ring by a symmetric optical path, and detecting the influence of thermal nonreciprocal phase shift to interference effect. When applying the same testing device and testing method, the invention is capable of providing comparative index value with reliable quality of the fiber ring, and providing standard for selecting high-performance fiber ring.

The invention discloses a method for synchronously measuring structural rigidity in guy cable structure construction. The method comprises the following steps of: adopting two pressure sensors, always monitoring the internal force of a first tensioned steel strand by using a first pressure sensor, and tensioning the residual steel strands one by one by using a second pressure sensor together witha lifting jack to track and measure the internal forces of various tensioned steel strands; tensioning the internal force of the first steel strand to reach a design value and anchoring; tensioning the second steel strand; and when the readings of the two pressure sensors are the same, stopping tensioning the second steel strand and anchoring, and recording the reading of the first pressure sensor; tensioning all residual steel strands one by one and anchoring according to a process of tensioning the second steel strand, and recording the reading of the first pressure sensor when the readingsof the two pressure sensors are the same; and substituting all measured data into a measurement formula to obtain a structural rigidity value of an anchoring structure at two ends of a guy cable.

The invention discloses a pig house environment temperature detection system based on a CAN (controller area network) bus. The pig house environment temperature detection system is characterized by comprising a CAN bus based pig house environment parameter collection platform and a pig house environment multipoint temperature fusion model, wherein pig house environment factor parameters are detected, adjusted and monitored by the CAN bus based pig house environment parameter collection platform, and the pig house environment multipoint temperature fusion model realizes pig house environment multipoint temperature fusion on the basis of support degree fusion weight and grey relational degree fusion weight which are obtained by a support degree matrix and a grey relational degree matrix of temperature fuzzy values of multiple detection point temperature sensors of the pig house environment as well as linear combination weight. According to the system, the problem that regulation and control for the temperature of the pig house environment is greatly affected by the fact that a conventional pig house monitoring system does not detect the temperature of the pig house environment according to the characteristics of nonlinearity and large lag of the pig house environment temperature change, large area of a pig house, complicated temperature change and the like is effectively solved.

The invention discloses a calibration device and method for a laser displacement measurement system, and the device and method are used for carrying out on-site calibration on the laser displacement measurement system on a high-precision rigidity measurement instrument, and belong to the field of measurement and test standards. According to the invention, a gauge block is reliably positioned and conveniently placed on the three beads through a workbench tool and a three-bead measuring mechanism with magnetism, so that the problem that the measurement precision is influenced by the gas film generated between the gauge block and the three-bead measuring mechanism due to installation, repeated positioning of the gauge block and the like is solved, and the field calibration of the laser displacement measurement system is realized.

The invention discloses a method of measuring the concrete pore structure. The method comprises the following steps: pouring slurry to be measured into a forming device, after the slurry solidifies, carrying out maintenance for a required period; adopting a solvent to stop hydration, drying the mould in a vacuum drying box to obtain a sample with a cavity; melting temperature variable alloy, pouring alloy into the cavity of the dried sample, placing the sample in a thermal insulation apparatus, placing the sample on a centrifuge to carry out a centrifugal treatment to obtain a sample with a measurable pore structure, and using electron microscope and CT to measure the positions, which are occupied by the temperature variable alloy, of the sample, namely the pore structure. The molten temperature variable alloy is pressed into the pores by the centrifugal force, the shortage that the pore structure is broken by a conventional sampling method is avoided; moreover, the temperature variable alloy is nontoxic and harmless, no pollution is generated during the operation process, the human body is not harmed, the pore structure of concrete is not changed, and the reality of the concrete pore structure is represented.

The invention provides a cowhouse environment temperature detection system based on a wireless sensor network which consists of a cowhouse environment parameter collection platform based on a wireless sensor network and a cowhouse environment multi-point temperature fusion model. The cowhouse environment parameter collection platform based on a wireless sensor network is used for cowhouse environment temperature detection, regulation and monitoring. The cowhouse environment multi-point temperature fusion model achieves cowhouse environment multi-point temperature fusion based on a similarity fusion weight, a distance fusion weight and a game theory combination weight calculated from a similarity matrix and a distance matrix of temperature Vague values of temperature sensors of multiple detection points in a cowhouse environment, so that the accuracy, reliability and robustness of cowhouse environment temperature fusion are improved. The system effectively solves the problems that a conventional cowhouse monitoring system does not detect the temperature of a cowhouse environment according to the characteristics such as nonlinearity and large lag of temperature changes of cow environment, large area of cowhouses and complicated temperature changes, so that cowhouse environment temperature detection is greatly influenced.

The invention relates to a CAN bus-based pig house environmental temperature intelligent monitoring system. The system is characterized in that the intelligent monitoring system is composed of a CAN bus-based pig house environment parameter acquisition and intelligent prediction platform, a pig house environment multi-point temperature fusion model and a pig house environment intelligent prediction model. With the CAN bus-based pig house environmental temperature intelligent monitoring system of the present invention adopted, an existing pig house monitoring system cannot intelligently monitor and predict the temperature of the environment of a pig house according to the non-linearity and large lag of the environmental temperature change of the pig house, the large area of the pig house, complicated temperature change and other characteristics, as a result, control and adjustment of the environmental temperature of the pig house are seriously affected, while, with the CAN bus-based pig house environmental temperature intelligent monitoring system adopted, the above problem can be solved.

The invention provides an audio frequency end-to-end time delay measurement method of non-intrusive single end acquisition and an apparatus thereof. The audio frequency end-to-end time delay measurement method comprises the following steps: placing a measurement signal generator locally, closing an echo elimination function of a far-end terminal, taking a microphone close to a loudspeaker at a far end to form an audio frequency loop. One audio frequency measuring signal emitted by the signal generator directly enters into a measurement apparatus, and the other audio frequency measuring signal enters into a local terminal of a detected system, and both of them returns through a remote terminal audio frequency loop respectively. Delay inequalities of the two signals are divided by 2, and a result is taken as a measured value of audio frequency end-to-end time delay. The measurement apparatus provided in the invention comprises an audio frequency measuring signal generator, an audio frequency multipath acquisition module, an audio frequency time delay measurement unit and a data storage and display unit. The method is a non-intrusive type. Compared with the prior art, the method is not influenced by internal realization of the detected system, time delay of all link are included comprehensively, and the method has the characteristics of accuracy and convenience.