Abstract: It discloses a system and a method for generating heralded single photons, wherein the system comprises a high-quality optical ring cavity, a PPKTP nonlinear crystal, a polarization beam splitter, a dichroic mirror, a light filtering device, a reflector module, an atomic vapor cell and a single photon detector, wherein: the high-quality optical ring cavity is formed by a first plano-concave reflector, a second plano-concave reflector, a third plano-concave reflector and a fourth plano-concave reflector; the PPKTP nonlinear crystal and the polarization beam splitter are positioned in an optical path between the first plano-concave reflector and the second plano-concave reflector; the dichroic mirror is positioned in an optical path behind a reflecting end of the polarization beam splitter.

Abstract: It discloses a system and a method for generating heralded single photons, wherein the system comprises a high-quality optical ring cavity, a PPKTP nonlinear crystal, a polarization beam splitter, a dichroic mirror, a light filtering device, a reflector module, an atomic vapor cell and a single photon detector, wherein: the high-quality optical ring cavity is formed by a first plano-concave reflector, a second plano-concave reflector, a third plano-concave reflector and a fourth plano-concave reflector; the PPKTP nonlinear crystal and the polarization beam splitter are positioned in an optical path between the first plano-concave reflector and the second plano-concave reflector; the dichroic mirror is positioned in an optical path behind a reflecting end of the polarization beam splitter.

Abstract: An evaporation closed chamber for detecting hazardous substance, having a closed chamber, an orifice plate, a pressure plate, a drive device and an elastic film, the orifice plate is mounted on any surface(s) of the closed chamber, the elastic film is arranged on the outer side of the orifice plate, the pressure plate is arranged on the outer side of the elastic film, and the drive device is in transmission connection with the pressure plate to drive the pressure plate to move forwards and backwards to press the elastic film against the orifice plate. The elastic film expands with the increase of internal temperature of the closed chamber and shrinks with the temperature decrease of the closed chamber such that the gas in the closed chamber can be timely compensated; the orifice plate prevents hazardous substance from leaving on the gas compensation device to influence test accuracy.

Abstract: The present disclosure discloses an electronic cooling anti-condensation system, and an anti-condensation method for the same. The system comprises a testing chamber, electronic cooling plates, temperature sensors, a temperature and humidity sensor, a cooling plate control unit, and a main controller. The main controller is electrically connected to the temperature sensors, the temperature and humidity sensor, and the cooling plate control unit. The main controller is capable of calculating a dew point value of the air in the testing chamber according to a temperature value and a humidity value of the interior the testing chamber acquired by the temperature and humidity sensor, and if the dew point value of the air is greater than a pre-determined threshold, the main controller controls the cooling plate control unit to reduce the number of operating electronic cooling plates or output powers of the electronic cooling plates, wherein the pre-determined threshold is a temperature T1° C.

Abstract: An evaporation closed chamber for detecting hazardous substance, having a closed chamber, an orifice plate, a pressure plate, a drive device and an elastic film, the orifice plate is mounted on any surface(s) of the closed chamber, the elastic film is arranged on the outer side of the orifice plate, the pressure plate is arranged on the outer side of the elastic film, and the drive device is in transmission connection with the pressure plate to drive the pressure plate to move forwards and backwards to press the elastic film against the orifice plate. The elastic film expands with the increase of internal temperature of the closed chamber and shrinks with the temperature decrease of the closed chamber such that the gas in the closed chamber can be timely compensated; the orifice plate prevents hazardous substance from leaving on the gas compensation device to influence test accuracy.

Abstract: The present disclosure discloses an electronic cooling anti-condensation system, and an anti-condensation method for the same. The system comprises a testing chamber, electronic cooling plates, temperature sensors, a temperature and humidity sensor, a cooling plate control unit, and a main controller. The main controller is electrically connected to the temperature sensors, the temperature and humidity sensor, and the cooling plate control unit. The main controller is capable of calculating a dew point value of the air in the testing chamber according to temperature value and a humidity value of the interior of the testing chamber acquired by the temperature and humidity sensor, and if the dew point value of the air is greater than a pre-determined threshold, the main controller controls the cooling plate control unit to reduce the number of operating electronic cooling plates or output powers of the electronic cooling plates, wherein the pre-determined threshold is a temperature T1° C.

Abstract: A simple chamber for a formaldehyde or VOC release test and pretreatment, having a chamber (1) provided with a chamber door (2), an air inlet (3), and an exhaust port (4). At least one semiconductor refrigeration sheet (5) or a liquid temperature regulating jacket (16) is mounted on the chamber (1), and a stirring fan (6) is mounted inside the chamber (1). A temperature sensor (7) located in the semiconductor refrigeration sheet (5) or used for temperature measurement of the liquid temperature regulating jacket (16) is mounted on the chamber (1). A temperature and humidity sensor (17) is installed inside the chamber (1), and a filtering duct (8) communicating with the interior of the chamber (1) is connected to the exterior of the chamber (1). An intake switch valve (9), an outlet switch valve (10), a filter device, and a filtering fan (11) are mounted on the filtering duct (8).

Abstract: A method for treating surface of releasing chamber in contact with test object comprising the following steps: (1) with regard to components made by processing stainless steel or glass, if the component is stainless steel, the stainless steel component is oxidized with an acid and then washed with an organic solvent and water, or electrolyzed after oxidation and then washed with an organic solvent and water; if the component is glass, the glass component is corroded by HCL or HF, or the surface thereof is roughened by a physical method; and (2) then follows production of a deactivated layer by processing the surface of the component washed in step (1), or first production of an intermediate layer by processing the surface of the component washed in step (1), and then production of a deactivated layer by processing the surface of the intermediate layer.

Abstract: A low pressure and high-low temperature test box capable of controlling humidity comprises a test box body (1), a first heater (2) and a first evaporator (3) which are installed in the test box body (1), a humiture sensor (4) for detecting the humiture inside the test box body (1) and a vacuum manometer (5) for detecting the pressure inside the test box body (1) which are both installed on the test box body (1), an air circulation device (6) for circulating the air inside the test box body (1), and a humidity adjusting device (7) which is connected to the test box body (1) and used for adjusting the humidity inside the test box body (1). A vacuum pump (8) for vacuumizing the test box body (1) is also provided on the test box body (1).

Abstract: Detection system and humidity detection method for detecting volatile organic compound comprises a device for introducing clean air and a controller, wherein the device for introducing clean air is connected with a test chamber; a test chamber sheath is sleeved outside the test chamber; the test chamber is provided with a temperature sensor for detecting the temperature in the test chamber, a high-temperature test exhaust device is connected with a high-temperature exhaust pipeline of the test chamber, and a low-temperature test exhaust device is connected with a low-temperature exhaust pipeline of the test chamber; a pipeline connecting the test chamber with the low-temperature test exhaust device is also provided with a dew point sensor for detecting dew point of the air in the low-temperature exhaust pipeline; and the temperature sensor and the dew point sensor are connected with the controller.

Abstract: A low pressure and high-low temperature test box capable of controlling humidity comprises a test box body (1), a first heater (2) and a first evaporator (3) which are installed in the test box body (1), a humiture sensor (4) for detecting the humiture inside the test box body (1) and a vacuum manometer (5) for detecting the pressure inside the test box body (1) which are both installed on the test box body (1), an air circulation device (6) for circulating the air inside the test box body (1), and a humidity adjusting device (7) which is connected to the test box body (1) and used for adjusting the humidity inside the test box body (1). A vacuum pump (8) for vacuumizing the test box body (1) is also provided on the test box body (1).

Abstract: Detection system and humidity detection method for detecting volatile organic compound comprises a device for introducing clean air and a controller, wherein the device for introducing clean air is connected with a test chamber; a test chamber sheath is sleeved outside the test chamber; the test chamber is provided with a temperature sensor for detecting the temperature in the test chamber, a high-temperature test exhaust device is connected with a high-temperature exhaust pipeline of the test chamber, and a low-temperature test exhaust device is connected with a low-temperature exhaust pipeline of the test chamber; a pipeline connecting the test chamber with the low-temperature test exhaust device is also provided with a dew point sensor for detecting dew point of the air in the low-temperature exhaust pipeline; and the temperature sensor and the dew point sensor are connected with the controller.