An Ion-type Fire Alarm Detection System Tester

Abstract

This utility model relates to the field of aviation equipment testing technology, and in particular to a tester for an ionization fire alarm detection system. The tester includes: an insulation resistance detection module connected to an ionization alarm sensor in the ionization fire alarm detection system via a first socket; a fire alarm detection module connected to a fire alarm control box in the ionization fire alarm detection system via a second socket; and a power supply module connected to both the insulation resistance detection module and the fire alarm detection module. This tester can perform rapid and accurate testing of ionization fire alarm detection systems.

Description

Technical Field

[0001] This utility model relates to the field of aviation equipment testing technology, and in particular to an ion-type fire alarm detection system tester. Background Technology

[0002] Fire detection systems are a crucial component of ensuring aircraft flight safety. Because aircraft engines operate at very high temperatures, malfunctions in the engine itself or surrounding fuel lines, or damage during combat, can potentially cause a fire. When a fire occurs in the aircraft engine compartment, a fire alarm signal should be promptly sent to the pilots so they can make the correct assessment and initiate firefighting operations. Therefore, the proper functioning of the fire detection system directly impacts flight safety.

[0003] Ionization fire detection systems work on the principle of gas ionization under the influence of flames. When an aircraft engine catches fire, the ionization fire sensor sends a signal to the fire control box. The fire control box compares and amplifies this signal before outputting it to the alarm circuit. Based on the fire alarm signal, the alarm circuit sends light, sound, and display warnings to the pilot, allowing the pilot to take timely action.

[0004] When replacing or repairing components of an ionization fire detection system, or during routine inspections, its operational status must be tested. It can only be put into use after its performance indicators are deemed satisfactory. Currently, the testing method primarily employs a manual operation mode using external resistors and a multimeter. Specifically, the testing personnel use a multimeter to manually measure the insulation resistance between the ionization fire detectors in channels I and II and the aircraft fuselage. This value is crucial for determining whether the insulation performance between the sensor and the fuselage meets standards, directly affecting the accuracy of the system's signal acquisition. Furthermore, to verify the effectiveness of the fire alarm control box, the testing personnel connect two standard resistors to channels I and II of the fire alarm control box respectively. Then, by observing the illumination status of the fire alarm lights in the cockpit, a rough judgment is made regarding the trigger response performance of the fire alarm control box. If the alarm lights illuminate as expected, the fire alarm control box is considered to be functioning normally; otherwise, a malfunction is considered to be present.

[0005] However, existing testing devices suffer from low accuracy and efficiency. Specifically, in insulation resistance measurement, contact resistance easily arises at the contact points between the multimeter probes and the sensor / body. This contact resistance is directly added to the actual measured value, leading to reduced measurement accuracy. Similarly, in the fire alarm control box performance testing, contact resistance is generated at the connection point between the external standard resistor and the control box channel. This contact resistance alters the actual equivalent resistance of the external resistor, causing a deviation between the signal input to the control box and the preset standard signal. This, in turn, reduces the reliability of the alarm light illumination status judgment, making it impossible to accurately assess the true performance of the control box. Furthermore, the entire testing process relies on manual operation, which is not only inefficient but also susceptible to subjective factors such as the operator's operational standards and experience level, further increasing the uncertainty of the test results.

[0006] Therefore, how to provide a device that can quickly and accurately detect ion fire alarm detection systems is a technical problem that urgently needs to be solved. Utility Model Content

[0007] To address the technical problem of low detection accuracy caused by contact resistance in ionization fire alarm detection systems, this invention provides the following solution.

[0008] Specifically, this utility model provides an ionization fire alarm detection system tester, comprising: an insulation resistance detection module connected to an ionization alarm sensor in an ionization fire alarm detection system via a first socket; a fire alarm detection module connected to a fire alarm control box in an ionization fire alarm detection system via a second socket; and a power supply module connected to the insulation resistance detection module and the fire alarm detection module.

[0009] Furthermore, the insulation resistance detection module includes a first insulation resistance meter and a second insulation resistance meter; wherein, the positive terminal of the first insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft body; the positive terminal of the second insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft body.

[0010] Furthermore, the tester also includes a voltage detection module, one end of which is connected to the power supply module.

[0011] Furthermore, a first switching switch is connected in series between the voltage detection module and the second socket.

[0012] Furthermore, the voltage detection module includes a first voltmeter and a second voltmeter; wherein, the positive terminal of the first voltmeter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft body; the positive terminal of the second voltmeter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft body.

[0013] Furthermore, the fire alarm detection module includes a fire alarm light, a first resistor, a second resistor, a third resistor, a fourth resistor, a second switch, and a third switch; wherein, one end of the second switch is connected to the positive terminal of the power supply module and the first switch, and the other end is connected to the first resistor, or to the second resistor and the positive terminal of the fire alarm light; one end of the third switch is connected to the positive terminal of the power supply module and the first switch, and the other end is connected to the third resistor, or to the fourth resistor and the positive terminal of the fire alarm light; the negative terminal of the fire alarm light is connected to the negative terminal of the power supply module.

[0014] Furthermore, the first switch, the second switch, and the third switch are all six-pin, three-position rocker switches.

[0015] Furthermore, the power supply module includes a battery pack, a switch, a fuse, and a third voltmeter; wherein, the positive terminal of the third voltmeter is connected to the positive terminal of the battery pack through the switch, and the negative terminal is connected to the negative terminal of the battery pack through the fuse.

[0016] Furthermore, the tester also includes a charging module, which is connected to the power supply module via a third socket for charging the power supply module.

[0017] The beneficial effects of this invention are as follows: By integrating the insulation resistance detection module and the fire alarm detection module into a single tester, testers can easily detect the insulation resistance of the ionization fire alarm sensor and the performance of the fire alarm control box simply by inserting the plug into the corresponding socket. Furthermore, it eliminates the contact resistance issues that arise when using external resistors and multimeters in existing technologies, thus improving the accuracy and efficiency of the test. In addition, it reduces the degree to which the accuracy of the test is affected by the tester's operational procedures, further enhancing the accuracy of the test. Finally, the inclusion of a power supply module improves the portability of the tester. Attached Figure Description

[0018] Figure 1 This is a schematic block diagram illustrating the structure of an ion-type fire alarm detection system tester according to an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the topology of an ion-type fire alarm detection system tester according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the control display panel of an ionization fire alarm detection system tester according to an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] To make this invention clear and easy to understand, the working principle of the ionization fire detection system will be explained first: When a fire breaks out in the engine compartment and flames pass between the ionization fire sensor and the aircraft fuselage, some molecules in the air gain sufficient energy under the influence of the light and heat energy of the flames, causing some electrons in some molecules to detach from the molecules. Thus, neutral gas molecules dissociate into positive ions and electrons, while some electrons combine with neutral gas molecules to form negative ions. If a voltage is applied between the ionization fire sensor and the aircraft fuselage at this time, these positive and negative ions and electrons move in specific directions under the influence of the electric field, making the air conductive. The resistance value will be less than or equal to 5MΩ. At this time, a resistance change signal indicating the presence of a flame is generated between the ionization fire sensor and the aircraft fuselage. The ionization fire sensor transmits this weak signal to the fire alarm control box. After transformation and amplification, it controls the fire alarm circuit to send a fire alarm signal to the pilot.

[0022] The fire alarm control box is a dual-channel design, containing two identical but independent circuits. An alarm will sound if a flame is detected between any ionization fire sensor and the engine housing (i.e., the resistance value of the gap between either sensor and the engine housing is less than or equal to 5 MΩ). The alarm will only be deactivated when the resistance value between both sensors and the engine housing is greater than or equal to 8 MΩ. The insulation resistance between these two sensors and the engine housing must always be greater than or equal to 20 MΩ.

[0023] In view of the working principle of ion fire alarm detection systems and the defects of existing devices, this invention develops an ion fire alarm detection system tester to quickly and accurately detect whether the ion fire alarm detection system of an aircraft engine is working properly.

[0024] Specifically, such as Figure 1 As shown, the ionization fire alarm detection system tester of this utility model includes a power supply module, an insulation resistance detection module, a fire alarm detection module, a voltage detection module, a first socket, a second socket, and a first switch. The insulation resistance detection module is connected to the ionization alarm sensor in the ionization fire alarm detection system via the first socket, and is used to detect whether the insulation resistance of the ionization alarm sensor meets the requirements. The fire alarm detection module is connected to the fire alarm control box in the ionization fire alarm detection system via the first switch and the second socket, and is used to detect whether the fire alarm control box can correctly respond to alarm actions and extinguish alarm actions. The voltage detection module is connected to the fire alarm control box in the ionization fire alarm detection system via the first switch and the second socket, and is used to detect whether the power supply voltage of the fire alarm control box is normal / meets the requirements. The first switch is used to switch between fire alarm detection and voltage detection to meet different detection needs. The power supply module is connected to the insulation resistance detection module, the fire alarm detection module, and the voltage detection module, and is used to supply power to these modules.

[0025] In this embodiment, the first and second sockets use aviation electrical connectors that conform to military aviation standards. Specifically, the first socket is model P20K2AQ, and the second socket is model P20J2Q. It should be noted that the first and second sockets should be consistent with the aircraft's model to ensure reliable plug contact. The electrical contact area of ​​the metal contacts between the plug and socket is large, and the contact resistance of the plug contacts is extremely small and negligible. Furthermore, no external resistor or multimeter is required, thus avoiding the problem of low detection accuracy caused by contact resistance in existing technologies.

[0026] The following is combined with Figure 2 The various modules of the tester are explained.

[0027] Specifically, the power supply module includes a battery pack and a switch (i.e., Figure 2 S2 in the middle), fuse (i.e. Figure 2 The test instrument consists of a third voltmeter (F2). The positive terminal of the third voltmeter is connected to the positive terminal of the battery pack via a switch, and the negative terminal is connected to the negative terminal of the battery pack via a fuse. The battery pack used is an aviation-grade 1800mAh, 20.0Wh rechargeable lithium-ion battery pack. This rechargeable lithium-ion battery pack can output a 12V DC voltage and has overcurrent, short-circuit, and temperature control protection functions. It also features long lifespan, low self-discharge, small size, and good safety performance. Furthermore, the third voltmeter is a digital high-precision voltmeter used to monitor the battery pack voltage in real time to ensure the stability and normal operation of the test instrument's voltage.

[0028] By setting a third voltmeter to monitor the battery pack voltage in real time, voltage anomalies (too high, too low, or fluctuating) can be detected in advance, allowing testing personnel to take timely measures. For example, if the voltage is too high, the testing of the ionization fire alarm detection system can be interrupted, and the tester can be repaired to avoid inaccurate test results due to tester malfunctions. This improves the accuracy of the test and extends the service life of the tester.

[0029] When testing ionization fire detection systems, the external resistors and multimeters used in existing technologies are bound to specific areas by wires, making them unusable in scenarios without power supply. In contrast, this invention eliminates the dependence on external power by setting up a power supply module, enabling it to be applied in various scenarios and improving the tester's adaptability and portability.

[0030] In one embodiment, the tester of this invention further includes a charging module, which is connected via a third socket ( Figure 2 (Not shown) Connects to the power supply module for charging the power supply module. This charging module has internal overvoltage, overcurrent, short circuit, and over-temperature protection functions, ensuring high safety and reliability. Specifically, the input 220V AC power is transformed, rectified, filtered, and regulated within the charging module, outputting 12.6V DC power to charge the battery pack within the power supply module.

[0031] The insulation resistance detection module includes a first insulation resistance meter and a second insulation resistance meter. The first insulation resistance meter measures the insulation resistance of the channel I ionization fire alarm sensor, and the second insulation resistance meter measures the insulation resistance of the channel II ionization fire alarm sensor. Specifically, the positive terminal of the first insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft fuselage. Similarly, the positive terminal of the second insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft fuselage. It should be noted that the insulation resistance referred to is the insulation resistance between the ionization fire alarm sensor and the aircraft fuselage.

[0032] In this embodiment, both the first insulation resistance meter and the second insulation resistance meter are high-sensitivity, isolated digital display insulation resistance meters. These insulation resistance meters can display the measured resistance value in real time and have the characteristics of high reliability, strong anti-interference ability, accurate detection and long service life.

[0033] By incorporating an insulation resistance detection module, the insulation resistance of the ionization fire alarm sensor can be tested simply by inserting the corresponding plug into the first socket, avoiding the contact resistance issues encountered when using a multimeter and thus improving detection accuracy. Furthermore, using a higher-precision insulation resistance meter further enhances the accuracy of the test.

[0034] The fire alarm detection module includes fire alarm lights (i.e. Figure 2 LED in the first resistor (i.e.) Figure 2 R1 in the middle), the second resistor (i.e. Figure 2 R2 in the middle), the third resistor (i.e. Figure 2 R3 in the middle), the fourth resistor (i.e. Figure 2 R4 in the middle), the second switching switch (i.e. Figure 2 SA2) and the third switching switch (i.e. Figure 2 (SA3 in the text). The second switch is used to switch between the alarm suppression test and the alarm test for channel II to check whether the channel II fire alarm control box can correctly respond to alarm actions and alarm suppression actions; the third switch is used to switch between the alarm suppression test and the alarm test for channel I to check whether the channel I fire alarm control box can correctly respond to alarm actions and alarm suppression actions; the fire alarm light is used to display the results of the alarm test and the alarm suppression test.

[0035] Specifically, one end of the second switch is connected to the output terminal of the power supply module and the first switch (i.e., the first contact of the second switch is connected to the positive terminal of the power supply module, and the second contact is connected to the first switch), and the other end is connected to the first resistor, or to the second resistor and the positive terminal of the fire warning light (i.e., the third contact of the second switch is connected to the aircraft body through the first resistor or the second resistor; when the third contact is connected to the aircraft body through the second resistor, the fourth contact is connected to the positive terminal of the fire warning light); similarly, one end of the third switch is connected to the output terminal of the power supply module and the first switch. The switch (i.e., the first contact of the third switch is connected to the positive terminal of the power supply module, and the second contact is connected to the first switch), and the other end is connected to the third resistor, or to the fourth resistor and the positive terminal of the fire warning light (i.e., the third contact of the third switch is connected to the aircraft body through the third or fourth resistor; when the third contact is connected to the aircraft body through the fourth resistor, the fourth contact is connected to the positive terminal of the fire warning light); the negative terminal of the fire warning light is connected to the negative terminal of the power supply module. When the alarm test is performed, the fire warning light should illuminate; when the alarm extinguishing test is performed, the fire warning light should extinguish.

[0036] The first and third resistors are 5W high-power metal film resistors with a resistance of 8MΩ, while the second and fourth resistors are 5W high-power metal film resistors with a resistance of 5MΩ. The resistance values ​​of these resistors are accurate and less affected by changes in ambient temperature, thus improving the accuracy of fire alarm tests.

[0037] In this embodiment, the first switch, the second switch, and the third switch (corresponding to) Figure 2 The SA1 switches used in this system employ aviation-grade six-pin, three-position rocker switches. These switches have three states, each corresponding to a different action. For example, if the first switch is switched to the position where the voltage detection module is located, voltage detection is performed; if switched to the position where the fire alarm test module is located, fire alarm detection is performed. Similarly, if the second switch is switched to the position where the first resistor is located, the alarm suppression test for the channel II fire alarm control box is performed; if switched to the position where the second resistor is located, the alarm test for the channel II fire alarm control box is performed. Likewise, if the third switch is switched to the position where the third resistor is located, the alarm suppression test for the channel I fire alarm control box is performed; if switched to the position where the fourth resistor is located, the alarm test for the channel I fire alarm control box is performed. By setting the first, second, and third switches, different testing requirements can be met, and the channel I and channel II fire alarm control boxes can be tested separately, improving the accuracy of fire alarm testing, and thus improving the accuracy of fire alarm control box performance testing.

[0038] By setting up a fire alarm detection module, the performance of the fire alarm controller can be tested simply by inserting the corresponding plug into the second socket, avoiding the contact resistance generated when using external resistors, thus improving the accuracy of the test. Furthermore, using a higher-precision voltmeter further enhances the accuracy of the test.

[0039] The voltage detection module includes a first voltmeter and a second voltmeter. The first voltmeter measures the power supply voltage of the channel I fire alarm control box, and the second voltmeter measures the power supply voltage of the channel II fire alarm control box. Specifically, the positive terminal of the first voltmeter is connected to the positive terminal of the power supply module, and the negative terminal is connected to the negative terminal of the power supply module. The first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft fuselage. Similarly, the positive terminal of the second voltmeter is connected to the positive terminal of the power supply module, and the negative terminal is connected to the negative terminal of the power supply module. The first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft fuselage.

[0040] In this embodiment, both the first voltmeter and the second voltmeter are high-sensitivity, isolated high-impedance voltmeters. These voltmeters can display the measured voltage values ​​in real time and have the characteristics of accurate measurement, strong anti-interference ability and long service life.

[0041] By setting up a voltage detection module, the power supply quality of the ionization fire alarm sensor supplied to the fire alarm control box can be tested. When the detected voltage is outside the specified range, it indicates that the sensitivity of the ionization fire alarm sensor does not meet the requirements, and in the event of a fire, it may fail to provide timely fire alarm signals, or even fail to provide any feedback (i.e., no alarm is triggered). Therefore, when the voltage detected by the voltage detection module is outside the specified range, the power supply voltage of the fire alarm control box is deemed unqualified.

[0042] In one embodiment, such as Figure 3 As shown, the tester of this utility model also has an operation display panel. This panel features a symmetrical left-right channel design, providing intuitive display and easy interpretation by the operator. Furthermore, the operation display panel also includes a quick-opening battery compartment for easy battery replacement. In addition, the panel is made of galvanized steel, offering high mechanical strength and a long service life.

[0043] Among them, the first insulation resistance meter corresponds to Figure 3 The insulation resistance of the I-channel sensor, and the corresponding second insulation resistance meter. Figure 3 The insulation resistance of the II channel sensor, corresponding to the first voltmeter. Figure 3 The voltage of the control box in channel I, and the corresponding voltage of the second voltmeter. Figure 3 The voltage of the control box in channel II, and the corresponding voltage of the third voltmeter. Figure 3 The voltmeter in the middle, the first switching switch corresponds to Figure 3 The control box voltage detection / fire alarm test, the second switch corresponds to channel II fire alarm / alarm suppression, and the third switch corresponds to... Figure 3 Channel I fire alarm / fire suppression, the third socket corresponds to Figure 3 The charging port is located in the center. It should be noted that... Figure 3 The detection socket in the middle is connected to the first socket and the second socket via an adapter cable (one-to-two wire).

[0044] The testing process of the ionization fire detection system is described in detail below.

[0045] The insulation resistance testing process is as follows: Connect the cable plug from the aircraft, which is connected to the ionization fire alarm sensor, to the socket (i.e., the first socket) marked for connecting the sensor on the tester of this invention, and turn on the power switch below the operation display panel (i.e., Figure 3 The switch in, that is Figure 2 (S2 in the process), then the tester begins to detect the insulation resistance of the ionization fire alarm sensor, and displays the measured resistance value on the corresponding channel insulation resistance meter on the operation display panel (i.e., the measurement result of the first insulation resistance meter is displayed). Figure 3 The measurement results of the second insulation resistance meter are displayed in the area where the insulation resistance of the I-channel sensor is located. Figure 3The area where the insulation resistance of channel II sensor is located (the region where the insulation resistance is measured). When the first insulation resistance meter displays 1 (infinity), the channel I ionization fire alarm sensor is considered normal, meaning its insulation performance is unaffected; when the second insulation resistance meter displays 1 (infinity), the channel II ionization fire alarm sensor is considered normal. When the insulation resistance value measured by either the first or second insulation resistance meter is less than 20MΩ, it indicates that the insulation resistance of the ionization fire alarm sensor has decreased, and its performance does not meet the specified requirements. Further investigation is needed to determine the cause, and it can only be put into use after meeting the corresponding performance indicators.

[0046] The fire alarm test process is as follows: After switching the middle switch (i.e., the first switch) on the operation display panel from the neutral position to the fire alarm test position, switch the left-side switch (i.e., the third switch) of channel I on the operation display panel from the neutral position to the fire alarm (5MΩ) position. The fire alarm light on the operation display panel should illuminate. If the fire alarm lights in the aircraft cockpit illuminate simultaneously, and the voice alarm and display alarm also issue corresponding warnings, then the alarm test of channel I is deemed to meet the requirements (i.e., the fire alarm control box of channel I can correctly respond to the alarm action); otherwise, it does not meet the requirements. When the switch of channel I is switched from the fire alarm (5MΩ) position to the alarm extinguishing (8MΩ) position, the fire alarm light on the operation display panel should extinguish. If the fire alarm lights in the aircraft cockpit extinguish simultaneously, and the voice alarm and display alarm disappear, then the alarm extinguishing test of channel I is deemed to meet the requirements (i.e., the fire alarm control box of channel I can correctly respond to the alarm extinguishing action); otherwise, it does not meet the requirements. After the fire alarm test of Channel I is completed, the switch for Channel I is switched to the neutral position, and the same operating method is used to test the fire alarm of Channel II. Since the test process is similar, it will not be described in detail here.

[0047] The voltage detection process is as follows: Switch the switch in the middle of the operation display panel from the neutral position to the control box voltage detection position. At this time, the I-channel control voltmeter and II-channel control voltmeter above the operation display panel should display the output voltage of the fire alarm control box (this voltage is the working power supply of the fire alarm control box to the ionization fire alarm sensor). When the measured voltage value is DC 90±2V and the voltage is stable without fluctuation, it is determined that the power supply voltage of the fire alarm control box meets the requirements; otherwise, it does not meet the requirements.

[0048] While this specification has shown and described various embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention.

Claims

1. An ionization-type fire alarm detection system tester, characterized in that, include: The insulation resistance detection module is connected to the ionization alarm sensor in the ionization fire alarm detection system via the first socket; The fire alarm detection module is connected to the fire alarm control box in the ionization fire alarm detection system via the second socket. The power supply module is connected to the insulation resistance detection module and the fire alarm detection module.

2. The ionization fire detection system tester of claim 1, wherein, The insulation resistance detection module includes a first insulation resistance meter and a second insulation resistance meter; wherein, the positive terminal of the first insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft body; the positive terminal of the second insulation resistance meter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first socket, and the second detection terminal is connected to the aircraft body.

3. The ionization fire detection system tester of claim 1, wherein, It also includes a voltage detection module, one end of which is connected to the power supply module, and the other end is connected to the fire alarm control box through the second socket.

4. The ionization fire detection system tester of claim 3, wherein, A first switching switch is connected in series between the voltage detection module and the second socket.

5. The ionization fire detection system tester of claim 4, wherein: The voltage detection module includes a first voltmeter and a second voltmeter; wherein, the positive terminal of the first voltmeter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft body; the positive terminal of the second voltmeter is connected to the positive terminal of the power supply module, the negative terminal is connected to the negative terminal of the power supply module, the first detection terminal is connected to the first switching switch, and the second detection terminal is connected to the aircraft body.

6. The ionization fire detection system tester of claim 4 wherein, The fire alarm detection module includes a fire alarm light, a first resistor, a second resistor, a third resistor, a fourth resistor, a second switch, and a third switch; wherein, one end of the second switch is connected to the positive terminal of the power supply module and the first switch, and the other end is connected to the first resistor, or to the second resistor and the positive terminal of the fire alarm light; one end of the third switch is connected to the positive terminal of the power supply module and the first switch, and the other end is connected to the third resistor, or to the fourth resistor and the positive terminal of the fire alarm light; the negative terminal of the fire alarm light is connected to the negative terminal of the power supply module.

7. The ionization fire detection system tester of claim 6 wherein, The first switch, the second switch, and the third switch are all six-pin, three-position rocker switches.

8. The ionization fire detection system tester of any of claims 1-7, wherein, The power supply module includes a battery pack, a switch, a fuse, and a third voltmeter; wherein, the positive terminal of the third voltmeter is connected to the positive terminal of the battery pack through the switch, and the negative terminal is connected to the negative terminal of the battery pack through the fuse.

9. The ionization fire detection system tester of claim 8, wherein, It also includes a charging module, which is connected to the power supply module via a third socket and is used to charge the power supply module.

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