The invention provides a high-temperature target material infrared emissivity measurement device and method. By adopting an energy contrast method based on a CVF spectrum radiometer, the quick and accurate measurement on the solid sample material at the high temperature of 50-800 DEG C and the spectrum emissivity in the spectrum range of 1.3-14 microns. The devices comprises a varying-temperaturestandard black body radiation source system, a sample heating radiation system, a positioning/orienting system, and a radiation measurement system. By measuring a standard diffuse reflection board signal, the influence of the measurement environment factor is reduced, and an accuracy rate of the measurement result is improved; a sample radiation uniformity problem is solved by designing a unique graphite thin-layer heating radiation module; the spectrum emissivity of multiple included angle directions can be measured by controlling the positioning/orienting system. Various module components ofthe device are independent, and easy to dismount and move; the data result accuracy rate is high; the device can be popularized and applied to the field of the aerospace and weapons, thereby providing basic condition guarantee for further developing the solid material infrared radiation characteristic research.

High-temperature target material infrared emissivity measurement device and method

The invention discloses a radio frequency shielding box, a power amplifier and a radio frequency shielding method. The shielding box comprises a shielding box body, first isolation pieces and second isolation pieces, wherein the shielding box body comprises a cavity for accommodating a power amplification circuit module; the first isolation pieces are arranged in the cavity to divide the cavity to a first cavity room and a second cavity room; each second isolation piece and each first isolation piece form an included angle, and each second isolation piece is arranged between each path of power amplification input circuit and an output circuit. In the case of work, the shielding box body and the power amplification circuit module are matched mutually, and the power amplification circuit module is arranged in the shielding box body. When the above layout mode is adopted to improve the shielding box, the problem that miniaturization of the radio frequency shielding box can not be realized in a condition of considering both the basic performance of the radio frequency shielding box and small circuit influences in the prior art can be solved, and effects of realizing miniaturization of the radio frequency shielding box while good performance and stability of the radio frequency shielding box are both considered are achieved.

Radio frequency shielding box, power amplifier and radio frequency shielding method

The invention provides a radar cross section (RCS) calibration method and device. The method comprises steps: RCS measurement is executed to a satellite to form an RCS two-dimensional data table, wherein the satellite has an incompletely-regular shape, and the incompletely-regular shape is formed by loading a radar reflector load with a regular geometric shape on a satellite platform; and by usinga radar equation and in combination of the RCS two-dimensional data table, the RCS measurement K value is calibrated. By using the technical scheme provided in the invention, space-based RCS calibration standard can be provided for a ground multi-band pulse radar, and in comparison with the traditional balloon tracking calibration mode, significant economic effects are achieved.

Radar cross section (RCS) calibration method and device

The invention discloses a demodulator of a transmission type coaxial cable Fabry-Perot sensor The demodulator comprises a VCO circuit, an amplifier, a power divider, a detector, a first transmittingport, a second transmitting end, a first receiving port, a second receiving port and a sensor, the VCO circuit is connected with the power divider through the amplifier; wherein the power divider is shunted through a first transmitting port and a second transmitting port, the first transmitting port and the second transmitting port are respectively connected with a first receiving port and a second receiving port through sensors, and the first receiving port and the second receiving port are connected with a detector By means of the mode, the demodulator and the demodulation method of the transmission type coaxial cable Fabry-Perot sensor dynamically monitor the state of the sensor in real time, obtain dynamic frequency deviation through cyclic scanning, calculate deformation quantity according to the frequency deviation, and are high in precision, small in error and high in environment adaptability

Demodulator and demodulation method of transmission type coaxial cable Fabry-Perot sensor

The invention discloses a radar-type moisture detection system. The radar-type moisture detection system comprises a mounting bottom plate, an antenna array, a channel assembly and a signal processing assembly, wherein the antenna array is used for transmitting a continuous microwave signal to a detected material and receiving a microwave signal reflected from the detected material; the signal processing assembly is used for receiving output data of the channel assembly and calculating the water content of the detected material sample; the antenna array is mounted on one side of the mounting bottom plate; the channel assembly and the signal processing assembly are mounted on the other side of the mounting bottom plate; a radome is mounted above the antenna array; a back cover is arranged below the mounting bottom plate. The moisture detection system integrates a detection system into an all-in-one machine, and has good detection accuracy and relatively strong universality; meanwhile, the moisture detection system has strong mobility, can be carried to any place or any environment for moisture detection, and is not subject to limitations of detection equipment itself, so that the using diversity and the using flexibility of the moisture detection system are improved.

Radar-type moisture detection system

Relating to the field of radar wave absorbing coating reflectivity measurement, the invention discloses a portable wave-absorbing coating reflectivity self-calibration test probe. The test probe comprises a box cover, a box, a circuit board and a loudspeaker. The box consists of a base plate and four lateral plates, any lateral plate is provided with several ports, the upper end of the box is provided with an opening, the box cover covers the box opening so as to form a sealed cavity with the box, the circuit board is disposed in the sealed cavity, a radio-frequency circuit is integrated on the circuit board, and the radio-frequency circuit is in electric connection with the ports on the lateral plates of the box. The loudspeaker adopts a waveguide structure and is connected to the base plate of the box. Because of the use of the radio-frequency integrated circuit and a radio-frequency circuit and probe integrated encapsulation structural form, the temperature consistency and the long-term use consistency of the microwave system circuit are greatly guaranteed. Therefore, the mode of one-time calibration and regular calibration inspection before delivery is employed to solve the calibration problem during daily use once for all, and recalibration is no longer needed during field use.

Portable wave-absorbing coating reflectivity self-calibration test probe

The invention relates to the technical field of microwave devices, and relates to a reflectivity test integrated microwave probe. A conduction probe is of an H-face horn structure and is sequentiallydivided into four parts: the front end of the conduction probe is a measuring port tightly attached to a wave absorbing coating; secondly, an expansion section is horn-shaped and has a special expansion angle and an expansion length; next, a standard waveguide section; finally, a standard waveguide flange. A microwave circuit is connected with a front-end signal feeding circuit through a solidified circuit, a constant-temperature crystal oscillator serves as a standard time base so as to provide a frequency standard for the whole system, and the frequency output precision is stable and not affected by the environment temperature; the constant-temperature crystal oscillator is used as a reference source, the frequency output precision is equal to that of a standard source, and the measurement repeatability and a dynamic range are ensured; double phase-locked sources are controlled in a timing sequence to simultaneously convert the output frequency; the microwave probe has the characteristics of high measurement stability, good repeatability, small environmental temperature influence, excellent vector cancellation effect and high reliability and automation degree.

Reflectivity test integrated microwave probe

The invention discloses a high-precision testing method for infrared emittance. Through a mechanical device, a standard reference black body is accurately moved to be within a view field range of a radiometer to be measured, it is avoided that ambient environment temperature changes and stray light have bad influences on testing results, and the precision of testing is improved; the mechanical device is a mechanical arm capable of conducting accurate positioning on automatic control. During testing, position information is recorded so as to be controlled accurately so that position informationtested by two persons can be identical as much as possible, and meanwhile, during calculating, errors caused by elimination of the position information are eliminated. During detecting, the to-be-tested object is accurately moved to be within the view field range of the radiometer to be tested, meanwhile, the position information during testing is recorded in real time, the measurement errors, caused by the ambient environment changes and stray light, of radiation signals generated during testing are avoided, the precision of testing the infrared emittance is improved, and practicability is good.

High-precision testing method for infrared emittance

The invention discloses a novel outdoor-field static RCS prepositioned linkage calibration testing method. The novel outdoor-field static RCS prepositioned linkage calibration testing method mainly comprises the steps that a prepositioned calibrator is tested, wherein the calibration calibrator is placed in front of a target calibrator, and the echo power of the calibration calibrator and the echopower of the target calibrator are respectively measured; the transfer calibration relation between the calibration calibrator and the target calibrator is established; the target calibrator is removed, and an objected to be tested is erected at a target testing position; an RCS measurement value of the objected to be tested is calibrated and calculated. By adopting the prepositioned calibrationmethod, the problems caused by work amount, time, potential safety hazards and cost caused by repeatedly alternative erection of a target and a standard body of an alternative calibration method are solved. By adopting the test processing method adopting linkage calibration, calibration errors caused by the nonideal field intensity distribution relation of different distance places in an actual testing field can be eliminated, the efficiency and precision of tests are greatly improved, and on-time high-quality completion of scientific research production tasks is guaranteed.

Novel outdoor-field static RCS prepositioned linkage calibration testing method

The invention belongs to the field of calibration or calibration of infrared detection instruments in the fields of aerospace, weapons, military camouflage, radiation detection and thermal imaging. The invention relates to a double-area temperature control large-caliber high-temperature infrared surface source blackbody device. The device comprises a radiating surface, a central heating body, an outer ring heating body, a central temperature sensor, an outer ring temperature sensor, a double PID type temperature controller, a convection shielding case and a heat insulation layer. Convection shielding covers are arranged on the upper portion and the lower portion of the device. The radiating surface is arranged in the device; the central heating body and the outer ring heating body are arranged in the device; the outer ring heating body is arranged at the upper end and the lower end of the central heating body, the outer ring temperature sensor is connected with the outer ring heating body, the central temperature sensor is connected with the central heating body, and the central temperature sensor and the outer ring temperature sensor are connected with the double PID type temperature controller.

Double-area temperature control large-caliber high-temperature infrared surface source blackbody device

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