5 results about "Catalytic sensor" patented technology

The utility model relates to a digital processing circuit of a catalytic combustion sensor, in the digital processing circuit, one end of a first detection resistor R1 is connected with one end of an internal compensation element C of a catalytic sensor CG1, the other end of the first detection resistor R1 is connected with the other end of a second detection resistor R2, and one end of the second detection resistor R2 is connected with one end of an internal detection element D of the catalytic sensor CG1; the other end of the compensation element C and the other end of the detection element D are connected with the first input end of the microprocessor IC1. The other end of the second detection resistor R2 is connected with the second input end of the microprocessor IC1. The wiring plug-in JP1 is used for performing serial port communication with the microprocessor IC1 and the outside; and the linear voltage-stabilized power supply IC2 is used for converting a power supply of the wiring plug-in JP1 into a voltage-stabilized power supply so as to supply power to the catalytic sensor CG1. The device has the beneficial effect that the sensor can be conveniently and independently replaced.

Embodiments of the present disclosure describe a mixed-matrix membrane (MMM), and methods of fabricating a MMM, that includes a filler and a seamless polymer matrix forming a first zone and a second zone. The density of the filler is asymmetric with a greater density of filler within the polymer matrix forming the second zone. A MMM of the present disclosure may be an integrally skinned asymmetric (ISA) MMM or a dense MMM. MMMs of the present disclosure may be utilized in numerous industries. e.g., in the field of organic solvent nanofiltration membranes (OSN), gas separation, fuel cell, battery, catalysis, sensors, pharmaceutical, food and beverages, cosmetics, and composite materials, among others.

The invention relates to a long-acting fuel gas alarm with a self-calibration function, and belongs to the technical field of fuel gas leakage alarms, and the long-acting fuel gas alarm comprises a laser methane sensor which is used for outputting a first detection signal in real time, and the first detection signal represents the gas concentration value of methane gas; the catalytic sensor is used for outputting a second detection signal in real time, the second detection signal represents the voltage value of the combustible gas, and the catalytic sensor and the laser methane sensor are installed in the same detection area; the mechanical sealing structure is used for dynamically controlling the on-off of a gas channel of the catalytic sensor according to the gas concentration value; and the self-calibration algorithm module is used for carrying out zeroing processing on the catalytic sensor when the gas concentration value meets a zeroing condition, and carrying out calibration processing on the catalytic sensor when the gas concentration value meets a calibration condition. The gas alarm has the beneficial effects that the detection cost of a user is reduced, and the self-calibration of the gas alarm is realized.

The application discloses a kind of gas alarm detection systems based on power bus, it is related to gas detection technical field, including first cable, second cable, controller, detector and full-bridge rectifier module;The bus output end of controller is connected with the one end of first cable and the one end of second cable respectively;The other end of first cable and the other end of second cable are commonly connected with the bus interface of detector electrically;First cable and second cable form two-wire power bus;Full-bridge rectifier module is arranged at the interface of detector and controller, so that the bus interface is non-polar.The application is from gas concentration threshold to the response delay of valve action ≤80ms, the communication error rate is less than 10-9 in 30dB strong interference environment, bus supports ≥5A peak current output, can drive high-power catalytic sensor array, detector hot plug replacement operation time is reduced;Maintenance personnel do not need special tool or circuit knowledge, the risk of misoperation is reduced.

The invention discloses a fuel gas alarm detection system based on a power bus, which relates to the technical field of fuel gas detection and comprises a first cable, a second cable, a controller, a detector and a full-bridge rectifier module. The bus output end of the controller is connected with one end of the first cable and one end of the second cable. The other end of the first cable and the other end of the second cable are electrically connected with a bus interface of a detector; the first cable and the second cable form a two-wire system power bus; and a full-bridge rectifier module is arranged at the interface of the detector and the controller, so that the bus interface is non-polar. The response delay from gas concentration threshold exceeding to valve closing action is less than or equal to 80ms, and the communication error rate is 1t in a 30dB strong interference environment; 10, the bus supports peak current output greater than or equal to 5A, a high-power-consumption catalytic sensor array can be driven, and the hot plug replacement operation time of the detector is shortened; maintenance personnel do not need special tools or circuit knowledge, and the misoperation risk is reduced.