Ultraviolet diode used in electric spark detection of internal circuit board of explosion-proof fire truck

When an explosion-proof fire truck (vehicle) is used in explosive hazardous locations, every electrical component and non-electrical component on the vehicle should be an explosion-proof component that does not produce high temperature, (static) electric sparks and other dangerous factors. In the normal operation of the explosion-proof fire truck, the dangerous temperature that can ignite the explosive environment will not be generated on the car, but in the fault state or abnormal situation, such as insufficient cooling water, etc., if the timely measures are not detected in time, dangerous temperatures may be generated So as to detonate the surrounding explosive and dangerous gas, the temperature monitoring platform of explosion-proof fire truck should be used at this time. The circuit board and monitoring equipment of the monitoring station may generate electric sparks. If it is used in an explosive and dangerous environment without treatment, it may also cause accidents. Therefore, it should also be an explosion-proof product.

An explosion-proof fire-fighting vehicle temperature monitoring platform capable of promptly alarming or sending control signals to factors that can generate dangerous temperatures on an explosion-proof fire-fighting vehicle and self-explosion-proof. The technical solution adopted is: an explosion-proof fire truck temperature monitoring platform, including a monitoring display platform, a cooling water pump, an ultraviolet detector, a temperature detector, a water level sensor, and a solenoid valve. The monitoring display platform is equipped with an explosion-proof alarm display lamp and an explosion-proof box . The explosion-proof box is provided with an intrinsically safe processing circuit and a control circuit, and the intrinsically safe processing circuit is connected with the control circuit. The control circuit is respectively connected with the explosion-proof alarm display lamp, the cooling water pump, and the solenoid valve through a signal line. The intrinsically safe processing circuit is respectively connected with the ultraviolet detector, the temperature detector, and the water level sensor through a signal line.
The temperature monitoring station for explosion-proof fire trucks. The explosion-proof box isolates the circuit of the temperature monitoring station for explosion-proof fire trucks from the external explosive gas environment. Even if the electric spark is generated in the circuit part, it will not cause danger; the circuit of the temperature monitoring station adopts intrinsically safe processing circuit This circuit limits the current and voltage of the ultraviolet detectors, temperature detectors and water level sensors that cannot be placed in the explosion-proof box, so that they cannot generate electric sparks; when the ultraviolet detector detects that the wavelength of the electric spark reaches the limit value, control The circuit makes the explosion-proof alarm indicator light, and the temperature detector detects that the temperature of each part of the explosion-proof fire truck has reached the limit value, and the explosion-proof alarm indicator light is lit; the water level sensor monitors the water level of the water tank, and when the water level is too low, the control circuit The explosion-proof alarm indicator will light up, and the solenoid valve will open the water. When the water level is too high, the control circuit will light up the explosion-proof alarm indicator, reminding firefighters to take corresponding measures; whether there is water circulating in the cooling system, just check Whether the circulating water pump is working or not, the control circuit can monitor whether the cooling water pump fails. If there is a failure, the explosion-proof alarm indicator will light up to remind firefighters to take measures. The utility model monitors various key parts of an explosion-proof fire truck, such as water jacket, exhaust pipe, cylinder block, power take-off, water level, water pump, exhaust port, etc., on the premise that it takes explosion-proof measures to avoid becoming a source of danger. Before the occurrence of factors that can detonate explosive gas, an alarm signal should be issued in time to remind firefighters to take corresponding measures, so as to eliminate hidden accidents and ensure the safety of on-site personnel.

Finally, the editor recommends a UV sensor used in the internal circuit board of an explosion-proof fire truck. The UV photodiode-SG01D-5LENS introduced by Gongcai.com from abroad. SiC has unique characteristics, can withstand high-intensity radiation, and is resistant to visible light. Almost insensitive, low dark current generated, fast response speed and low noise. These characteristics make SiC an excellent material for semiconductor ultraviolet detectors in the visible blind area. SiC detectors can always operate at temperatures up to 170°C (338°F). The temperature coefficient of the signal (response rate) is also very low, <0,1%/K. Due to the low noise (fA level of dark current), extremely low ultraviolet radiation intensity can be effectively detected. Please note that this device needs to be equipped with a corresponding amplifier.
SiC photodiodes have seven different effective sensitive areas to choose from, from 0.06 mm2 to 36 mm2. The standard version is broadband UVA-UVB-UVC. The four filtered versions result in a tighter sensitivity range. All photodiodes have a sealed metal housing (TO type), with a diameter of 5.5mm TO18 housing or 9.2mm TO5 housing. Further options are 2 pins (1 insulated, 1 grounded) or 3 pins (2 insulated, 1 grounded).