A full metal sealed EMCCD(Electron Multiplication Charge Coupled Device) camera refrigeration dewar comprises a thermoelectric cooler(TEC), a cold finger, a CCD socket, an EMCCD, a window, an outer shell, a copper seal ring and a base. A full metal sealed vacuum cavity is formed by the window, the outer shell and the base, the window and the outer shell are welded through anode welding, the outer shell and the base are sealed through knife edge flanges, the TEC, the cold finger, the EMCCD and the like are placed in the vacuum cavity, and the TEC serves as a cold source of a system. The interior of the vacuum cavity is vacuated, heat exchange between the EMCCD and the external environment is reduced to the minimum though the vacuum environment in the cavity, and thus the refrigeration effect is guaranteed. The system is suitable for the field of EMCCD camera refrigeration.

Full metal sealed EMCCD camera refrigeration dewar

The invention provides an automatic missile resistance testing system. The system comprises first matrix switches, second matrix switches, a multimeter pen clip, a computer and a standard resistor, wherein the first matrix switches, the second matrix switches and the multimeter pen clip are connected with the computer; the standard resistor is connected with the second matrix switches, and to-be-tested missile resistance is connected with the first matrix switches; the multimeter pen clip is selectively connected with the first matrix switch or the second matrix switch; during self-test, the standard resistor and the multimeter pen clip form a test loop through the second matrix switches, and when resistance is measured, the to-be-tested missile resistance and the multimeter pen clip form a test loop through the first matrix switches. The automatic missile resistance testing system realizes automation of a missile resistance test, reduces errors of a traditional manual test, greatly improves the test efficiency, shortens the test time, reduces the complication of missile resistance and greatly improves the flexibility.

Automatic missile resistance testing system

The invention discloses a multichannel value of resistance automation measuring system The multichannel value of resistance automation measuring system comprises a burn-in power source, a multichannel electronic switch array, a data collector, a current-limiting resistance, a circuit protection unit and a computer, wherein the multichannel electronic switch array is a multichannel single-pole double-bladed switch array, according to a test requirement of arbitrary one-channel component in multichannel infrared devices, the channel component is disconnected with the burn-in power source and is connected with the data collector to finish automatic switch between a try state and a test state of the component; simultaneously, the data collector is used for measuring value of resistance of the switched component to achieve the aim that the value of the resistance is automatically measured By the adoption of a method that the computer sends command to a RS232 interface means of the data collector, the measured data are transferred to the computer to be stored; by the adoption of the system, the facts that the value of the resistance of the multichannel component is automatically measured and the data of the multichannel component is automatically stored are achieved, the rate, the accuracy and the data size of collecting component burn-in data are improved

Multichannel value of resistance automation measuring system

A sealed cavity signal output device of an EMCCD camera refrigeration system is characterized by being composed of an upper half shell (1), O-shaped rings (2), a signal output board (3), an EMCCD (4) and a lower half shell (5) The signal output board (3) is clamped between the upper half shell (1) and the lower half shell (5) and connected with the upper half shell (1) and the lower half shell (5) in a sealed mode through the O-shaped rings (2) to constitute a sealed cavity; the EMCCD (4) is placed on the signal output board (3) in the sealed cavity and prevented from having heat exchange with the external environment through the sealed environment; the signal output board (3) is a multilayer printed board, copper is laid on the portions, making contact with the sealing rings, of the utmost layer of the board, and therefore sealing reliability of the O-shaped rings (2) is guaranteed; the layers in the board are provided with signal wires, and signals of the EMCCD (4) in the cavity are output through the signal wires Compared with a conventional vacuum socket, the sealed cavity signal output device has the advantages of being compact in structure and low in signal loss

Sealed cavity signal output device of EMCCD camera refrigeration system

The invention discloses a system for measuring the resistance of a thermal control device. The system includes a measurement controller, a holder, a resistance test card, a thermocouple test card andthe like. The holder is of a pressing buckle type or a pressing type. An array of more than 40 circuits is formed. Upon measuring the resistance, the measurement controller designates in the array a measurement channel which corresponds to the holder. The resistance test card closes the designated corresponding measurement channel by controlling a multi-circuit matrix switch card via a DO. A measurement circuit loop of the designated channel is established. The resistance test card measures the resistance Rx of a resistor, and the resistance is feedbacked to the measurement controller throughan interface. Therefore, the measurement of one channel is completed, and the system completes the entire measurement until measurement of all measurement channels is completed. According to the invention, the system adopts the single-channel pressing buckle type, and has the characteristics of easy operation, large contact area, firm connection and small size, light weight, easy moving and fast deployment.

System for measuring resistance of thermal control device

The patent discloses a multipath resistance automation measure system. The system comprises an aged power supply, a multipath electronic switch array, a data collector, current-limiting resistors, a circuit protection unit and a computer. The multipath electronic switch array is a multipath single-pole double-gate switch array, which can break the connection between a component and the aged power supply according to test requirement of any component in a multipath infrared device and connect the component to the data collector, in order to complete automatic switching between experiment state and test state of the component; and the data collector conducts resistance measurement on the switched component to realize automatic test of resistance. Through an RS232 interface mode command sent from the computer to the data collector, the measurement data is transferred into the computer for storage. The system realizes automatic resistance test on the multipath components and automatic data storage, and increases rate, accuracy and data bulk of component aged data acquisition.

Multipath resistance automation measure system

The invention discloses a multi-station vacuum air exhaust device for an infrared detector. The multi-station vacuum air exhaust device for the infrared detector comprises a main cavity body, a main cavity body sealing valve, a molecular pump, an inserting plate valve, a side drawing valve, a mechanical pump and a front-level pump. The main cavity body is a public vacuum chamber of the whole vacuum air exhaust device. A plurality of external connectors are distributed on the periphery of the main cavity body. The public chamber is divided into a plurality of air exhaust branches. Two air exhaust passages are arranged between the public vacuum chamber of the main cavity body and a pump unit. All the valves are ultrahigh vacuum pneumatic valves. The sealing form of the device is the metal sealing. The multi-station vacuum air exhaust device for the infrared detector is simple in structure and easy to dismantle and install. The number of the stations is many. High level of a vacuum degree can be achieved. Pressure difference of the main cavity body and the station is small. All the selected valves and the pump unit can be automatically controlled.

Ji Peng

Papers

Multipath resistance automation measure system

Multi-station vacuum air exhaust device for infrared detector

Multichannel value of resistance automation measuring system