Equipment and method for checking state of airplane fire extinguishing control system

Abstract

The invention provides equipment for checking the state of an airplane fire extinguishing control system, and the equipment comprises a fire extinguishing data collector which is used for collecting an analog quantity and converting the analog quantity into a digital quantity; the fire extinguishing data display is connected with the fire extinguishing data collector, and the fire extinguishing data display is used for receiving the digital quantity, displaying the digital quantity and determining the state of the aircraft fire extinguishing control system based on the digital quantity; meanwhile, the invention further provides a method for checking the state of the airplane fire extinguishing control system. The problems that an existing method and an original tool tester cannot effectively judge whether the working state of the trigger and the working line of the trigger are good or not, and poor contact is easily caused by a detection signal due to the fact that a used test cable is too long are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of aviation fire extinguishing system control test, and in particular, relates to a device and method for checking the status of an aircraft fire extinguishing control system. Background Art

[0002] The aircraft fire extinguishing system is one of the essential systems of the aircraft. It controls and extinguishes fires when the aircraft is on the ground or in flight. Whether the lock trigger works normally directly determines whether the fire extinguisher bottle control mechanism can be opened to effectively extinguish the fire.

[0003] At present, the installation and connection method of a certain type of fire extinguisher bottle has been changed, and the existing methods and equipment cannot determine the working status of the lock trigger and whether its working circuit is good. Summary of the invention

[0004] Purpose of the invention: The present invention overcomes the problem that the existing methods and original tooling testers cannot effectively determine the working status of the trigger and whether its working circuit is good, and the test cable used is too long and the detection signal is prone to poor contact.

[0005] In a first aspect, the present application provides a device for checking the status of an aircraft fire extinguishing control system, the device comprising:

[0006] A fire extinguishing data collector is used to collect analog quantities and convert the analog quantities into digital quantities;

[0007] A fire extinguishing data display is connected to the fire extinguishing data collector, and is used to receive the digital quantity, display the digital quantity, and determine the state of the aircraft fire extinguishing control system based on the digital quantity.

[0008] Preferably, the fire extinguishing data collector comprises:

[0009] A first box body having an opening;

[0010] A first operation panel is arranged at the opening and forms a cavity with the first box body;

[0011] A connector, disposed on the first operating panel, the connector being connected to a plug of an aircraft fire extinguishing control system;

[0012] A multi-channel power acquisition module is connected to the connector, and is used to acquire analog quantities and convert the analog quantities into digital quantities;

[0013] The first wireless transceiver module is connected to the multi-channel power collection module, and the wireless transceiver module is used to receive the digital quantity and send the digital quantity to the fire extinguishing data display.

[0014] Preferably, the first box body is also provided with heat dissipation holes and a handle.

[0015] Preferably, the fire extinguishing data display comprises:

[0016] A second wireless transceiver module is used to receive the digital quantity and send the digital quantity to a display;

[0017] A display is connected to the second wireless transceiver module, and the display is used to receive and display the digital quantity.

[0018] Preferably, the fire extinguishing data display comprises:

[0019] A communication interface connected to the display; wherein the communication interface is capable of receiving the data volume through a cable and sending the data volume to the display;

[0020] A display is used to receive and display the digital quantity.

[0021] In a second aspect, the present application also provides a method for checking the status of an aircraft fire extinguishing control system, the method comprising:

[0022] Step 1. Turn on the power switch on the fire extinguishing data display panel, the power supply indicator light is on, the display works, the system starts and enters the test page, at this time the display shows the voltage of bottles 1 to 5, and the fire extinguishing status ball changes from gray to green, indicating that the communication is normal;

[0023] Step 2. Operate the fire extinguishing switch on the aircraft to extinguish the fire in the corresponding channel. At this time, the corresponding channel indicator light on the fire extinguishing data acquisition panel will light up, the fire extinguishing ball on the corresponding channel on the fire extinguishing data display panel will change from green to red, the voltage will increase, and the current will increase. When the fire extinguishing signal disappears, the channel indicator light on the corresponding fire extinguishing data acquisition panel will go out, the fire extinguishing ball on the fire extinguishing data display panel will change from red to green, and the voltage and current will decrease, indicating that the aircraft fire extinguishing control system is working normally.

[0024] Preferably, before step 1, the step further includes:

[0025] Connect one end of the special test cable to the connector on the operation panel of the fire extinguishing data collector, and the other end to the 5-way plug of the aircraft fire extinguishing control system. Turn on the power switch of the fire extinguishing data collector, and the power switch indicator light will come on. Press the "Self-Test" button on the operation panel of the fire extinguishing data collector, and the 5 indicator lights on the operation panel of the fire extinguishing data collector will come on, indicating that the special test cable is reliably connected.

[0026] Preferably, the step 2 further includes:

[0027] When the fire extinguishing data collector has communication failure or power outage, the voltage and current indication of the corresponding channel of the fire extinguishing data display is at a fixed value and no longer fluctuates slightly. At this time, you need to press the "reset" button on the display. The system will reset. If the communication returns to normal, the voltage and current display of the 5 channels of the fire extinguishing data collector display will fluctuate slightly. At this time, the equipment is working normally.

[0028] Beneficial technical effects of this application:

[0029] Compared with the previous methods, this test equipment can be operated by one person independently to complete all the adjustment and measurement work, without the need for coordination and cooperation of multiple people. The measurement is stable and reliable, the monitoring data is intuitive and visible, and it is not easy to produce poor contact and difficult to identify the status indicator light. The present invention can be completed by one person independently and efficiently. By using it multiple times and comparing it with the original operation method, it effectively saves working time, reduces the number of coordinated operators, improves work efficiency, shortens working time, and reduces waste of human resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a fire extinguishing data collector provided in an embodiment of the present application;

[0031] Figure 2 It is an exploded diagram of a fire extinguishing data collector provided in an embodiment of the present application;

[0032] Figure 3 It is a structural schematic diagram of a fire extinguishing data display provided in an embodiment of the present application;

[0033] Figure 4 is an exploded diagram of a fire extinguishing data display provided in an embodiment of the present application;

[0034] Figure 5 This is a circuit schematic diagram of a fire extinguishing data display provided in an embodiment of the present application;

[0035] Figure 6 It is a circuit schematic diagram of a fire extinguishing data collector provided in an embodiment of the present application;

[0036] Among them, 1. the first box, 2. the first operation panel, 3. the relay J1, 4. the RS485 relay module, 5. the first power module, 6. the multi-channel power acquisition module, 7. the first battery pack, 8. the first wireless transceiver module, 9. the 5-way working indicator light, 10. the transceiver antenna, 11. the RS485 wired communication interface, 12. the connector, 13. the debugging reserved interface, 14. the first power switch, 15. the self-test switch, 16. the second box, 17. the second operation panel, 18. the display, 19. the second power module, 20. the second wireless transceiver module, 21. the interlocking relay, 22. the second battery pack, 23. the second power switch, 24. the wired communication interface, 25. the charging interface, 26. the transmitting antenna. DETAILED DESCRIPTION

[0037] It should be noted that this application has developed a set of special wireless transmission and reception digital display inspection equipment to solve the above problems. In order to ensure the normal test work of the modified aircraft fire extinguishing system, this test equipment can monitor the status of the new aircraft fire extinguishing system and has the compatibility of multiple models of aircraft fire extinguishing testers. The test equipment should have the fire extinguishing circuit voltage and current detection function. The use of this tester can simplify the relevant operating procedures, prevent measurement errors caused by human factors, reduce the number of debugging personnel required for related processes, and prevent the safety hazards of the system caused by too many operators and poor communication. It provides a device that can quickly determine the working status of the trigger and whether the working circuit is good.

[0038] The present application develops a set of special equipment, which converts the voltage signal of the working status of the fire extinguishing control into a digital signal and sends it out via a wireless signal, and then converts it via a special receiving device, and displays the working status data on a liquid crystal display to solve the above problems.

[0039] See also Figure 1 , Figure 2 and Figure 6 , a fire extinguishing data collector provided in an embodiment of the present application includes:

[0040] The first box body is made of aluminum alloy, with an open hollow design at the top, and heat dissipation holes on the side panels. The first box body is also provided with a handle for easy handling. The box body is the main structural part of the fire extinguishing data collector, used to install the above components, ensure reliable connection, and facilitate the movement of the equipment.

[0041] The first operation panel is connected to the first box to form a closed whole of the fire extinguishing data collector. A connector, a self-test switch, a first power switch, an RS485 wired communication interface, a debugging interface, a first wireless transceiver module, a transceiver antenna, and 5-way working indicator lights are installed on it to ensure that the above components are reliably connected to the operation panel.

[0042] Relay J1, 5 pairs of contact intermediate relays. The common end of the first pair of contacts is connected to the + end of the 1st indicator light, and the normally closed end of the first pair of contacts is respectively connected to the pin of connector 1 and the V1+ of the 1st channel of the multi-channel power acquisition module; the common end of the second pair of contacts is connected to the + end of the 2nd indicator light, and the normally closed end of the second pair of contacts is respectively connected to the pin of connector 2 and the V1+ of the 2nd channel of the multi-channel power acquisition module; the common end of the third pair of contacts is connected to the + end of the 3rd indicator light, and the normally closed end of the third pair of contacts is respectively connected to the pin of connector 3 and the V1+ of the 3rd channel of the multi-channel power acquisition module; the common end of the fourth pair of contacts is connected to the + end of the 4th indicator light, and the normally closed end of the fourth pair of contacts is respectively connected to the pin of connector 4 and the V1+ of the 4th channel of the multi-channel power acquisition module; the common end of the fifth pair of contacts is connected to the + end of the 5th indicator light, and the normally closed end of the fifth pair of contacts is respectively connected to the pin of connector 5 and the V1+ of the 5th channel of the multi-channel power acquisition module; the normally open ends of the five pairs of contacts are connected in parallel with fuse 2.

[0043] One end of the relay J1 coil is connected to the normally open end of the self-test switch, and the other end of the relay J1 coil is connected to the battery pack.

[0044] The RS485 relay module receives RS485 digital signals and controls the operation of 5 groups of relays. The normally closed end of the first group of relays is connected to the - end of the 1st indicator light, the normally closed end of the first group of relays is connected to the 1st I1+ of the multi-channel power acquisition module, and the normally open end of the first group of relays is respectively connected to the - end of the battery pack, the connector 6 pin, and the 1st V1- of the multi-channel power acquisition module; the normally closed end of the second group of relays is connected to the - end of the 2nd indicator light, the normally closed end of the second group of relays is connected to the 2nd I2+ of the multi-channel power acquisition module, and the normally open end of the second group of relays is respectively connected to the connector 7 pin and the 2nd V2- of the multi-channel power acquisition module; the normally closed end of the third group of relays is connected to the - end of the 3rd indicator light, the normally closed end of the third group of relays is connected to the multi-channel power acquisition module The 3rd group of relays are connected to I3+ of the multi-channel power acquisition module, the normally open end of the 3rd group of relays are respectively connected to the 8th pin of the connector and the 3rd V3- of the multi-channel power acquisition module; the normally closed end of the 4th group of relays is connected to the - end of the 4th indicator light, the normally closed end of the 4th group of relays is connected to I4+ of the 4th multi-channel power acquisition module, and the normally open end of the 4th group of relays is respectively connected to the 9th pin of the connector and the 4th V4- of the multi-channel power acquisition module; the normally closed end of the 5th group of relays is connected to the - end of the 5th indicator light, the normally closed end of the 5th group of relays is connected to I5+ of the multi-channel power acquisition module, and the normally open end of the 5th group of relays is respectively connected to the 10th pin of the connector and the 5th V5- of the multi-channel power acquisition module.

[0045] The + end of the RS485 relay module is connected to fuse 2, and the - end of the RS485 relay module is connected to the battery pack; the A end of the RS485 relay module is connected to the RS485 wired communication interface 2 pin, the RS485A end of the multi-channel power acquisition module, and the A end of the wireless transceiver module; the B end of the RS485 relay module is connected to the RS485 wired communication interface 1 pin, the RS485 B end of the multi-channel power acquisition module, and the B end of the wireless transceiver module.

[0046] The RS485 relay module receives the remote digital signal sent by the fire extinguishing data display. After working, the 5 relays work, that is, the common end of the 5 relays is connected to the normally open section. After the self-test signal disappears, the 5 relays reset, that is, the common end of the 5 relays is connected to the normally closed end. When the RS485 relay module is working, the multi-channel power acquisition module collects the working voltage of the 5 fire extinguishing lines on the machine.

[0047] The first power supply module converts the battery voltage into the working voltage of the wireless transceiver module to ensure that the wireless transceiver module will not be burned due to excessive power supply voltage.

[0048] The first power module in+ terminal is connected to the first fuse, the first power module in- terminal is connected to the first battery pack - terminal; the first power module out+ terminal is connected to the common terminal of the relay J2 contact, and the first power module out- terminal is connected to the battery pack - terminal. Power is supplied to each electrical device in the fire extinguishing data collector. The + terminal of the battery pack is connected to the common terminal of the power switch. The connection of the - terminal of the battery pack is supplemented below.

[0049] The multi-channel power acquisition module collects the real-time power of 5 indicator lights, that is, the voltage at both ends of the indicator lights and the current flowing through the indicator lights; the analog signal is converted into a digital signal and sent to the wireless transceiver module and the RS485 wired communication interface respectively. It should be pointed out that the voltage is measured in parallel and the current is measured in series.

[0050] Supplementary description of the multi-channel power collection module: the + end of the multi-channel power collection module is connected to the first fuse, and the - end of the multi-channel power collection module is connected to the battery pack.

[0051] The first battery pack supplies power to various electrical equipment of the fire extinguishing data collector.

[0052] The first wireless transceiver module receives the digital signal, converts it into a wireless signal and sends it out; the + end of the wireless transceiver module is connected to the normally closed contact of the relay J2; the - end of the wireless transceiver module is connected to the battery pack.

[0053] The 5-way working indicator light uses 5-way incandescent lamps as the carrier. The power of the incandescent lamp when it is lit should be consistent with the detonation power of the aircraft fire extinguishing system electric squib, that is, the power of the 5-way fire extinguishing circuit on the aircraft can be checked by checking the incandescent lamp. If the incandescent lamp can be lit, it means that the power of the 5-way fire extinguishing circuit on the aircraft meets the technical requirements.

[0054] The transceiver antenna is used in conjunction with the wireless transceiver module to transmit the wireless signal of the wireless transceiver module at a frequency of 433MHz, and can also receive 433MHz frequency signals.

[0055] RS485 wired communication interface is used for wired communication between fire extinguishing data display and fire extinguishing data collector, and is redundant with wireless transceiver module. It should be noted that after connecting RS485 wired communication cable, the power supply line of wireless transceiver module is cut off, that is, wireless transceiver module and RS485 wired communication cannot work at the same time.

[0056] The RS485 wired communication interface pin 3 is connected to the battery pack, and the RS485 wired communication interface pin 4 is connected to the relay coil. The internal holes 3 and 4 of the plugs at both ends of the RS485 wired communication cable are short-circuited.

[0057] Relay J2 ensures that the wireless transceiver module and the RS485 wired communication function cannot work at the same time. One end of the relay J2 coil is connected to the first fuse.

[0058] When the RS485 wired communication cable is connected, the RS485 wired communication interface pins 3 and 4 are short-circuited; after the power switch is turned on, the positive electricity passes through the positive end of the battery pack to the common end and the normally open end of the power switch, and then to the first fuse, and then through the relay J2 coil to the RS485 wired communication interface pins 4 and 3, and returns to the negative end of the battery pack. Relay J2 works. The common end of relay J2 is disconnected from the normally closed end. The wireless transceiver module is powered off, and the wireless transceiver module does not work.

[0059] The connector uses a 10-pin connector and is used in conjunction with a special test cable. The special test cable is a one-to-five design, with one end connected to the connector and the other five ends connected to the 5-way fire extinguishing line on the aircraft; it should be pointed out that connector pin 1 and pin 6 are the first line, connector pin 2 and pin 7 are the second line, connector pin 3 and pin 8 are the third line, connector pin 4 and pin 9 are the fourth line, and connector pin 5 and pin 10 are the fifth line.

[0060] The first power switch is a metal button self-locking switch with an indicator light. Press it to connect the self-locking state and the indicator light will turn on. Press it again to disconnect and the indicator light will go out.

[0061] It should be added that the normally open end of the power switch is connected to the first fuse and the second fuse.

[0062] Self-check switch, metal button self-reset switch with indicator light, press the switch to turn on the indicator light, the switch is turned on, and the switch automatically resets and disconnects after releasing the switch, and the indicator light goes out.

[0063] It should be additionally explained that the common terminal of the self-test switch is connected to the second fuse 2 .

[0064] Charging interface, charge the battery pack through a dedicated charger. Charging interface CD+ is connected to fuse 3, and charging interface CD- is connected to the negative terminal of the battery pack.

[0065] The diode D1 provides reverse polarity protection for the charging state to prevent the charger from being connected in reverse. The positive end of the diode is connected to the third fuse, and the negative end of the diode is connected to the positive end of the battery pack.

[0066] Fire extinguishing collection working status description

[0067] When the power switch is turned on, the positive electricity flows from the positive terminal of the battery to the common terminal of the power switch, and then is divided into two paths through the normally open terminal of the first power switch;

[0068] It passes through the first fuse to the + end of the multi-channel power collection module, and then returns from the - end of the multi-channel power collection module to the negative end of the battery pack, and the multi-channel power collection module works; it passes through the first fuse to the in+ end of the first power module, and then returns from the in- end of the first power module to the negative end of the battery. The first power module works, transforms the battery pack voltage and supplies power to the wireless transceiver module, and the wireless transceiver module works.

[0069] The other route passes through the second fuse to supply positive power to the common end of the self-test switch, the + end of the RS485 relay module, and the normally open end of the five pairs of contacts of relay 1. The - end of the RS485 relay module is connected to the negative end of the battery pack, and the RS485 relay module is in standby mode.

[0070] Use a special test cable to connect the fire extinguishing data collector to the 5-way fire extinguishing line on the aircraft, and press the self-test button:

[0071] The positive electricity passes through the common terminal and the normally open terminal of the self-test switch to the coil of relay 1, and then returns from the other end of the coil of relay 1 to the negative terminal of the battery pack. Relay 1 works, and the common terminal and the normally open terminal of the 5 pairs of contacts are short-circuited.

[0072] The positive electricity passes through the normally open ends of 5 pairs of contacts to the common end and the + end of 5 indicator lights, and then to the common end and normally closed end of 5 groups of relays of RS485 relay module, and then to the multi-channel power acquisition module I1+, I2+, I3+, I4+, I5+, and then to the multi-channel power acquisition module I1-, I2-, I3-, I4-, I5-, and then to the special test cable through the connector 6, 7, 8, 9, 10 pins. When the special test cable is connected reliably, the 6, 7, 8, 9, 10 pins are short-circuited through the aircraft body. The negative return is returned to the negative end of the battery pack through the connector 6 pin. 5 indicators are lit, and the multi-channel power acquisition module collects the power of the 5 indicator lights, converts it into a digital signal and transmits it to the wireless transmission module and the RS485 wired communication interface.

[0073] When the onboard fire extinguishing circuit works, after the 1-way fire extinguishing signal is triggered, the positive electricity passes through the special test cable to the connector 1 pin and is divided into two paths: one path to the power acquisition module 1-way V1+, through the multi-way power acquisition module 1-way V1- and the connector 6 pin, to the onboard 1-way fire extinguishing circuit, and the multi-way power acquisition module collects the voltage of the 1-way indicator light. One path goes to the first pair of contacts of relay 1, the normally closed end, to the 1-way indicator light, and then to the first pair of contacts of the RS485 relay module, the common end and the normally closed end, to the multi-way power acquisition module 1-way I1+, I1- and the connector 6 pin, to the onboard 1-way fire extinguishing circuit, and the multi-way power acquisition module collects the working current of the 1-way indicator light.

[0074] After the 2-way fire extinguishing signal is triggered, the positive electricity is divided into two paths through the special test cable to the connector 2 pin: one path to the 2-way V2+ of the power acquisition module, through the 2-way V2- of the multi-way power acquisition module and the connector 7 pin, to the 2-way fire extinguishing line on the aircraft, and the multi-way power acquisition module collects the voltage of the 2-way indicator light. One path goes to the normally closed end of the second pair of contacts of relay 1 to the 2-way indicator light, then to the common end and normally closed end of the second pair of relays of the RS485 relay module, to the 2-way I2+, I+- of the multi-way power acquisition module and the connector 7 pin, to the 2-way fire extinguishing line on the aircraft, and the multi-way power acquisition module collects the working current of the 2-way indicator light.

[0075] After the 3-way fire extinguishing signal is triggered, the positive electricity is divided into two paths through the special test cable to the connector 3 pin: one path to the power acquisition module 3-way V3+, through the multi-way power acquisition module 3-way V3- and connector 8 pin, to the 3-way fire extinguishing line on the aircraft, and the multi-way power acquisition module collects the voltage of the 3-way indicator light. One path goes to the normally closed end of the third pair of contacts of relay 1 to the 3-way indicator light, then to the common end and normally closed end of the third pair of relays of the RS485 relay module, to the 3-way I3+, I3- and connector 8 pin of the multi-way power acquisition module, to the 3-way fire extinguishing line on the aircraft, and the multi-way power acquisition module collects the working current of the 3-way indicator light.

[0076] After the 4-way fire extinguishing signal is triggered, the positive electricity is divided into two paths through the special test cable to the connector 4 pin: one path to the power acquisition module 4-way V4+, through the multi-way power acquisition module 4-way V4- and connector 9 pin, to the 4-way fire extinguishing line on the machine, and the multi-way power acquisition module collects the voltage of the 4-way indicator light. One path goes to the 4th pair of contacts of relay 1 to the 4-way indicator light, then to the 4th pair of relay common and normally closed ends of the RS485 relay module, to the 4-way I4+, I4- and connector 9 pin of the multi-way power acquisition module, to the 4-way fire extinguishing line on the machine, and the multi-way power acquisition module collects the working current of the 4-way indicator light.

[0077] After the 5-way fire extinguishing signal is triggered, the positive electricity is divided into two paths through the special test cable to the connector 5 pin: one path to the power acquisition module 5-way V5+, through the multi-way power acquisition module 5-way V5- and the connector 10 pin, to the 5-way fire extinguishing line on the machine, and the multi-way power acquisition module collects the voltage of the 5-way indicator light. One path goes to the normally closed end of the 5th pair of contacts of relay 1 to the 5-way indicator light, then to the common end and normally closed end of the 5th pair of relays of the RS485 relay module, to the 5-way I5+, I5- and the connector 10 pin of the multi-way power acquisition module, to the 5-way fire extinguishing line on the machine, and the multi-way power acquisition module collects the working current of the 5-way indicator light.

[0078] The multi-channel power acquisition module collects the voltage and current of the 5-channel fire extinguishing indicator lights, converts them into digital quantities, and transmits the signals to the wireless transceiver module and the RS485 limited communication interface through the A and B terminals of the multi-channel power acquisition module.

[0079] After receiving the digital signal, the wireless transceiver module converts it into a wireless signal and sends it out at a frequency of 433MHz.

[0080] After the wireless transceiver module receives the wireless remote self-test signal, it converts the wireless signal into a digital signal and transmits it to the RS485 relay module. The RS485 relay module works, the 5 pairs of relay groups work, and the normally open ends of the 5 pairs of relays are short-circuited with the common end. At this time:

[0081] The 5-way fire extinguishing circuits on the machine are connected to the multi-way power collection module through connectors 1, 6, 2, 7, 3, 8, 4, 9, 5, and 10 respectively through 5-way indicator lights. The multi-way power collection module collects the no-load voltage of the 5-way fire extinguishing circuits on the machine.

[0082] See also Figure 3 , Figure 4 and Figure 5 , a fire extinguishing data display provided by an embodiment of the present application includes:

[0083] Second box: It adopts aluminum alloy box, with open hollow design at the top, heat dissipation holes on the side panels, and a handle for easy handling. The second box is the main structural part of the fire extinguishing data collector, used to install the above components, ensure reliable connection, and facilitate equipment movement.

[0084] The second operation panel is connected to the box body to form a closed whole of the fire extinguishing data collector. A display, a second wireless transceiver module, a second power switch, a wired communication interface, a charging interface, and a transceiver antenna are installed on it to ensure that the above components are reliably connected to the operation panel.

[0085] The display uses an industrial control touch screen display to display the data collected by the fire extinguishing data collector. After the display is started, a remote self-test switch is set on the main interface. Touch it to turn it on, and the self-test signal disappears after releasing it. The display shows 1 to 5 fire extinguishing status balls, voltage, and current data. When the display receives a standby signal from the fire extinguishing data collector, the fire extinguishing status ball changes from gray to green. When the fire extinguishing signal is received, the fire extinguishing status ball changes from green to red, and the voltage and current change accordingly.

[0086] The display com terminal is divided into two paths: one path is connected to the A and B terminals of the wireless transceiver module through the normally closed terminals and common terminals of the first and second pairs of contacts of relay J2; the other path is connected to the pins 1 and 2 of the wired communication interface.

[0087] The positive terminal of the display power interface is connected to the normally open terminal of the power switch, and the negative terminal of the display power interface is connected to the negative terminal of the battery pack.

[0088] The second power supply module converts the battery voltage into the working voltage of the wireless transceiver module to ensure that the wireless transceiver module will not be burned due to excessive power supply voltage.

[0089] The in+ end of the second power module is connected to the fuse 4, the in- end of the second power module is connected to the - end of the battery pack; the out+ end of the second power module is connected to the normally open end of the third pair of contacts of the relay J2, and the out- end of the second power module is connected to the - end of the battery pack. Power is supplied to various electrical devices in the fire extinguishing data display. The + end of the battery pack is connected to the common end of the power switch.

[0090] The second wireless transceiver module receives the digital signal and converts it into a wireless signal to send out; the + end of the wireless transceiver module is connected to the common end of the relay J3; the - end of the wireless transceiver module is connected to the battery pack.

[0091] Interlock relay J3 ensures that the wireless transceiver module and the wired communication function cannot work at the same time. One end of the relay J3 coil is connected to the negative end of the battery pack. The other end of the relay J3 coil is connected to the wired communication interface 4 pin.

[0092] When the wired communication cable is connected, the wired communication interface pins 3 and 4 are short-circuited; after the power switch is turned on, the positive electricity passes through the positive end of the battery pack to the common end and the normally open end of the power switch, and then to the fifth fuse, and then through the relay J3 coil to the wired communication interface pins 4 and 3, and returns to the negative end of the battery pack. Relay J3 works. The common end of relay J3 is disconnected from the normally closed end. The wireless transceiver module is powered off, and the wireless transceiver module does not work.

[0093] The second power switch is a metal button self-locking switch with an indicator light. Press it to connect the self-locking state and the indicator light will turn on. Press it again to disconnect and the indicator light will go out.

[0094] It should be added that the normally open end of the second power switch is connected to the fourth fuse and the fifth fuse.

[0095] Specific working conditions of fire extinguishing data display:

[0096] Turn on the power switch, the positive electricity flows from the positive end of the battery pack to the common end of the power switch, and is divided into three paths. One path goes to the display power interface and then returns to the negative end of the battery pack, and the display works.

[0097] The second path passes through the fourth fuse to the second power module In+, and then returns to the negative end of the battery pack through in-, and the second power module works. The battery pack voltage is converted into the wireless transceiver module working voltage to power the wireless transceiver module, and the wireless transceiver module works;

[0098] The three paths pass through the fifth fuse and are used to interlock the wireless transceiver module with the wired communication interface.

Claims

1. A device for checking the status of an aircraft fire extinguishing control system, characterized in that: The device comprises: A fire extinguishing data collector is used to collect analog quantities and convert the analog quantities into digital quantities; A fire extinguishing data display is connected to the fire extinguishing data collector, and is used to receive the digital quantity, display the digital quantity, and determine the state of the aircraft fire extinguishing control system based on the digital quantity.

2. The device according to claim 1, characterized in that The fire extinguishing data collector comprises: A first box body having an opening; A first operation panel is arranged at the opening and forms a cavity with the first box body; A connector, disposed on the first operating panel, the connector being connected to a plug of an aircraft fire extinguishing control system; A multi-channel power acquisition module is connected to the connector, and is used to acquire analog quantities and convert the analog quantities into digital quantities; The first wireless transceiver module is connected to the multi-channel power collection module, and the wireless transceiver module is used to receive the digital quantity and send the digital quantity to the fire extinguishing data display.

3. The device according to claim 2, characterized in that The first box body is also provided with heat dissipation holes and a handle.

4. The device according to claim 2, characterized in that The fire extinguishing data display comprises: A second wireless transceiver module is used to receive the digital quantity and send the digital quantity to a display; A display is connected to the second wireless transceiver module, and the display is used to receive and display the digital quantity.

5. The device according to claim 2, characterized in that The fire extinguishing data display comprises: A communication interface connected to the display; wherein the communication interface is capable of receiving the data volume through a cable and sending the data volume to the display; A display is used to receive and display the digital quantity.

6. A method for checking the status of an aircraft fire extinguishing control system, characterized in that: The method comprises: Step 1. Turn on the power switch on the fire extinguishing data display panel, the power supply indicator light is on, the display works, the system starts and enters the test page, at this time the display shows the voltage of bottles 1 to 5, and the fire extinguishing status ball changes from gray to green, indicating that the communication is normal; Step 2. Operate the fire extinguishing switch on the aircraft to extinguish the fire in the corresponding channel. At this time, the corresponding channel indicator light on the fire extinguishing data acquisition panel will light up, the fire extinguishing ball on the corresponding channel on the fire extinguishing data display panel will change from green to red, the voltage will increase, and the current will increase. When the fire extinguishing signal disappears, the channel indicator light on the corresponding fire extinguishing data acquisition panel will go out, the fire extinguishing ball on the fire extinguishing data display panel will change from red to green, and the voltage and current will decrease, indicating that the aircraft fire extinguishing control system is working normally.

7. The method according to claim 6, characterized in that The step 1 also includes: Connect one end of the special test cable to the connector on the operation panel of the fire extinguishing data collector, and the other end to the 5-way plug of the aircraft fire extinguishing control system. Turn on the power switch of the fire extinguishing data collector, and the power switch indicator light will come on. Press the "self-test" button on the operation panel of the fire extinguishing data collector, and the 5 indicator lights on the operation panel of the fire extinguishing data collector will come on, indicating that the special test cable is reliably connected.

8. The method according to claim 6, characterized in that The step 2 further includes: When the fire extinguishing data collector fails in communication or loses power, the voltage and current indication of the corresponding channel of the fire extinguishing data display is at a fixed value and no longer fluctuates slightly. At this time, you need to press the "reset" button on the display. The system will reset. If the communication returns to normal, the voltage and current display of the 5 channels of the fire extinguishing data collector display will fluctuate slightly. At this time, the equipment is working normally.

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