Inspection device for aircraft fire alarm system

Abstract

The utility model discloses an inspection device for an airplane fire alarm system, which comprises a fire alarm control box HKH-4A, a fire alarm control box HKH-6A, a power supply module, a test mode switching unit, a test channel selection switch, a fire simulation unit, a thermistor simulation unit and a fire alarm indicating lamp, the power supply module, the test mode switching unit and the test channel selection switch are connected in sequence; the fire simulation unit and the thermistor simulation unit are respectively connected with the test channel selection switch; the fire hazard simulation unit is connected with the fire alarm control box HKH-4A; the thermistor simulation unit is connected with the fire alarm control box HKH-6A; and the fire alarm control box HKH-4A and the fire alarm control box HKH-6A are also respectively connected with the fire alarm indicating lamp. And main components of the aircraft fire alarm system can be comprehensively and accurately checked.

Description

Technical Field

[0001] The utility model relates to the field of aviation, in particular to an inspection device for an aircraft fire alarm system. Background Art

[0002] In the field of aviation safety, the reliability and accuracy of aircraft fire alarm systems are crucial. As one of the key safety systems on an aircraft, the aircraft fire alarm system's primary function is to promptly detect fires, sound an alarm, and implement appropriate firefighting measures when a fire occurs, preventing the spread of fire and protecting the lives of passengers and crew. However, due to the complex and harsh operating environment of aircraft fire alarm systems, system components are susceptible to various factors and may malfunction. Therefore, regular inspection and maintenance of aircraft fire alarm systems is particularly important.

[0003] Traditional aircraft fire alarm system inspection methods rely primarily on manual inspection, a time-consuming and labor-intensive process that also struggles to ensure comprehensiveness and accuracy. With technological advancements, a number of devices for aircraft fire alarm system inspection have emerged on the market. However, most of these devices are limited in functionality and can only inspect a specific portion of the system, failing to meet the need for a comprehensive inspection. Furthermore, these devices are complex to operate and difficult to carry, creating significant inconveniences during operation. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an inspection device for an aircraft fire alarm system, comprising a fire alarm control box HKH-4A or HKH-6A, including a power module, a test mode switching unit, a test channel selection switch, a fire simulation unit, a thermistor simulation unit, and a fire alarm indicator light;

[0005] The power module, test mode switching unit, and test channel selection switch are connected in sequence; the fire simulation unit and the thermistor simulation unit are respectively connected to the test channel selection switch; the fire simulation unit is connected to the fire alarm control box HKH-4A; the thermistor simulation unit is connected to the fire alarm control box HKH-6A; the fire alarm control box HKH-4A and the fire alarm control box HKH-6A are also respectively connected to the fire alarm indicator light.

[0006] Preferably, the power module includes a power management module, a fuse module and a power switch; the power management module, the fuse module and the power switch are connected in sequence, and the power switch is connected to the test mode switching unit.

[0007] Preferably, the power switch is a 4-pin 2-speed switch.

[0008] Preferably, the test mode switching unit is a selection switch, and the selection switch is connected to the test channel selection switch.

[0009] Preferably, the test channel selection switch includes a first test channel selection switch and a second test channel selection switch; one end of the first test channel selection switch is connected to the selection switch; the other end of the first test channel selection switch is connected to the fire simulation unit; one end of the second test channel selection switch is connected to the selection switch; the other end of the second test channel selection switch is connected to the thermistor simulation unit.

[0010] Preferably, the thermistor simulation unit includes a 5MΩ resistance module and an 8MΩ resistance module; the 5MΩ resistance module and the 8MΩ resistance module are respectively connected to the other end of the second test channel selection switch, and the 5MΩ resistance module and the 8MΩ resistance module are also respectively connected to the fire alarm control box HKH-6A.

[0011] Preferably, the fire simulation unit adopts a potentiometer, and the potentiometer is connected to the fire alarm control box HKH-4A.

[0012] The beneficial effects of the present invention are: improved inspection efficiency and accuracy: the device integrates multiple inspection functions, can conduct comprehensive and accurate inspections of the main components of the aircraft fire alarm system, avoids omissions and misjudgments in traditional manual inspection methods, and improves inspection efficiency and accuracy.

[0013] Easy to operate and carry: The device adopts a modular design, with simple connections between components and easy operation. Furthermore, its compact size and light weight make it easy to carry and transport, greatly facilitating inspections of aircraft fire alarm systems.

[0014] Enhanced system reliability and safety: Regular inspection and maintenance of aircraft fire alarm systems can promptly identify and eliminate potential faults, ensuring the system's normal operation. This device helps improve the reliability and safety of aircraft fire alarm systems, protecting the lives of passengers and crew.

[0015] Scalability: The design of the device takes into account possible future expansion needs. For example, additional resistance modules or potentiometers can be added to simulate more fire and temperature signals to meet the inspection requirements of fire alarm systems on different models of aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the principle of an inspection device for an aircraft fire alarm system;

[0017] Figure 2 This is the test principle block diagram;

[0018] Figure 3 The figure is a circuit diagram of an inspection device for an aircraft fire alarm system. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0020] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0021] like Figure 1 As shown, an inspection device for an aircraft fire alarm system includes a fire alarm control box HKH-4A or HKH-6A, including a power module, a test mode switching unit, a test channel selection switch, a fire simulation unit, a thermistor simulation unit, and a fire alarm indicator light;

[0022] The power module, test mode switching unit, and test channel selection switch are connected in sequence; the fire simulation unit and the thermistor simulation unit are respectively connected to the test channel selection switch; the fire simulation unit is connected to the fire alarm control box HKH-4A; the thermistor simulation unit is connected to the fire alarm control box HKH-6A; the fire alarm control box HKH-4A and the fire alarm control box HKH-6A are also respectively connected to the fire alarm indicator light.

[0023] The power supply module includes a power management module, a fuse module and a power switch; the power management module, the fuse module and the power switch are connected in sequence, and the power switch is connected to the test mode switching unit.

[0024] The power switch is a 4-pin 2-speed switch.

[0025] The test mode switching unit is a selection switch, and the selection switch is connected to the test channel selection switch.

[0026] The test channel selection switch includes a first test channel selection switch and a second test channel selection switch; one end of the first test channel selection switch is connected to the selection switch; the other end of the first test channel selection switch is connected to the fire simulation unit; one end of the second test channel selection switch is connected to the selection switch; the other end of the second test channel selection switch is connected to the thermistor simulation unit.

[0027] The thermistor simulation unit includes a 5MΩ resistor module and an 8MΩ resistor module; the 5MΩ resistor module and the 8MΩ resistor module are respectively connected to the other end of the second test channel selection switch, and the 5MΩ resistor module and the 8MΩ resistor module are also respectively connected to the fire alarm control box HKH-6A.

[0028] The fire simulation unit adopts a potentiometer, and the potentiometer is connected to the fire alarm control box HKH-4A.

[0029] An inspection device for an aircraft fire alarm system specifically includes the following components: a fire alarm control box HKH-4A, a fire alarm control box HKH-6A, a power module, a test mode switching unit, a test channel selection switch, a fire simulation unit, a thermistor simulation unit, and a fire alarm indicator light.

[0030] The power module, which provides energy for the entire inspection device, includes a power management module, a fuse module, and a power switch. The power management module converts and distributes incoming electrical energy to meet the power needs of the various components within the device. The fuse module protects the circuitry from damage caused by excessive current. The power switch is a four-pin, two-position switch used to control the device's power on and off, as well as switching between different operating modes. The power switch is connected to the test mode switching unit, enabling different test functions by switching between different positions.

[0031] The test mode switching unit is a selection switch for selecting the test mode of the device. The selection switch is connected to the test channel selection switch. By switching the different gears of the selection switch, the fire simulation unit or the thermistor simulation unit can be selected for testing.

[0032] The test channel selector switch includes a first test channel selector switch and a second test channel selector switch. One end of the first test channel selector switch is connected to the selector switch, and the other end is connected to the fire simulation unit. The second test channel selector switch also has one end connected to the selector switch, and the other end is connected to the thermistor simulation unit. By switching the test channel selector switch, different test channels can be selected, thereby testing different fire alarm control boxes.

[0033] The fire simulation unit uses a potentiometer connected to the fire alarm control box HKH-4A. The potentiometer can simulate the electrical signal generated when a fire occurs, thereby testing the fire alarm control box HKH-4A's ability to respond to fire signals.

[0034] The thermistor simulation unit includes a 5MΩ resistor module and an 8MΩ resistor module, each connected to the other end of the second test channel selector switch and to the HKH-6A fire alarm control box. The 5MΩ and 8MΩ resistor modules simulate thermistor resistance values at different temperatures, thereby testing the HKH-6A fire alarm control box's ability to respond to temperature signals.

[0035] The fire alarm control box HKH-4A and fire alarm control box HKH-6A are also connected to fire alarm indicator lights. When the fire alarm control box receives a simulated fire or temperature signal, it will trigger the fire alarm indicator lights to light up, thereby prompting the tester whether the fire alarm control box is working properly.

[0036] The specific inspection device for aircraft fire alarm systems uses a box-type frame structure. The box is divided into two parts by stainless steel plates. The left side is used to store cables, and the upper part of the right side is the operation panel. The system consists of a function conversion switch, impedance network, plug socket, digital resistance meter, high resistance meter and cable. The function conversion switch can be used to check the different working conditions of different parts of the fire alarm system. The test principle block diagram of the inspection device for aircraft fire alarm systems is shown below. Figure 2 shown

[0037] like Figure 3 The circuit diagram of a device for checking aircraft fire alarm systems and the test principle of the fire alarm control box (HKH-4A) are shown.

[0038] Select "HKH-4A" on the test mode selection switch to put the HKH-4A into the test state.

[0039] 1) Alarm status test

[0040] The sensor simulation selection switch selects "5MΩ", and the simulation unit simulates a 5MΩ sensor signal to the fire alarm detection control device.

[0041] When the left test switch of the fire alarm indicator light is turned on, the sensor signal is supplied to the left channel of the fire alarm control box. At this time, the fire alarm control box should detect the fire state and light up the left fire alarm indicator light. If the left fire alarm indicator light does not light up, it means that the left detection channel of the fire alarm control box is faulty.

[0042] When the right test switch of the fire alarm indicator light is pressed, the sensor signal is supplied to the right channel of the fire alarm control box. At this time, the fire alarm control box should detect the fire status and light up the right fire alarm indicator light. If the right fire alarm indicator light does not light up, it means that the right detection channel of the fire alarm control box is faulty.

[0043] 2) Non-alarm state test

[0044] The sensor simulation selection switch selects "8MΩ", and the simulation unit simulates the 8MΩ sensor signal to the fire alarm detection control device.

[0045] When the left test switch with the fire alarm indicator light is pressed, the sensor signal is supplied to the left channel of the fire alarm control box. At this time, the fire alarm control box should detect that there is no fire and the left fire alarm indicator light will not light up. If the left fire alarm indicator light is on, it means that the left detection channel of the fire alarm control box is faulty.

[0046] When the right test switch with the fire alarm indicator light is pressed, the sensor signal is supplied to the right channel of the fire alarm control box. At this time, the fire alarm control box should detect that it is not in a fire state and will not light up the right fire alarm indicator light. If the right fire alarm indicator light is on, it means that the right detection channel of the fire alarm control box is faulty.

[0047] D.2.2.2.2 Fire alarm control box (HKH-6A) test principle

[0048] Select "HKH-6A" on the test mode selection switch to put HKH-6A into the test state. The fire alarm detector simulates the thermistor through the potentiometer to test the fire alarm detection device. Adjust the potentiometer "R.ADJ" to the maximum value and turn on the power switch of the tester.

[0049] 1) Set the selector switch to "EXT", slowly reduce the potentiometer from the maximum value until the "Fire" light comes on, set the selector switch to "INT", and read the resistance value on the meter. If the resistance value is 1.35KΩ±100Ω, the fire alarm detection device is working properly; otherwise, the fire alarm detection device is faulty. Continue to reduce the potentiometer resistance to 230±20Ω and set the selector switch to "EXT". If the "Short circuit" indicator light comes on, the over-temperature control box is normal; otherwise, the over-temperature control box is faulty.

[0050] 2) When testing the thermal sensor, turn the selector switch to "EXT", insert the instrument probe into the "SENSOR" jack, and the value read on the instrument should not be greater than 25Ω. The resistance value between the test core wire and the sleeve should be greater than 500KΩ. If it is not within the specified range, the thermal sensor is faulty.

[0051] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. An inspection device for aircraft fire alarm systems, comprising a fire alarm control box HKH-4A or a fire alarm control box HKH-6A, characterized in that: It includes a power supply module, a test mode switching unit, a test channel selection switch, a fire simulation unit, a thermistor simulation unit and a fire alarm indicator light; The power module, test mode switching unit, and test channel selection switch are connected in sequence; the fire simulation unit and the thermistor simulation unit are respectively connected to the test channel selection switch; the fire simulation unit is connected to the fire alarm control box HKH-4A; the thermistor simulation unit is connected to the fire alarm control box HKH-6A; the fire alarm control box HKH-4A and the fire alarm control box HKH-6A are also respectively connected to the fire alarm indicator light.

2. The inspection device for an aircraft fire alarm system according to claim 1, characterized in that: The power supply module includes a power management module, a fuse module and a power switch; the power management module, the fuse module and the power switch are connected in sequence, and the power switch is connected to the test mode switching unit.

3. The inspection device for an aircraft fire alarm system according to claim 2, characterized in that: The power switch is a 4-pin 2-speed switch.

4. The inspection device for an aircraft fire alarm system according to claim 1, characterized in that: The test mode switching unit is a selection switch, and the selection switch is connected to the test channel selection switch.

5. The inspection device for an aircraft fire alarm system according to claim 1, characterized in that: The test channel selection switch includes a first test channel selection switch and a second test channel selection switch; one end of the first test channel selection switch is connected to the selection switch; The other end of the first test channel selection switch is connected to the fire simulation unit; One end of the second test channel selection switch is connected to the selection switch; The other end of the second test channel selection switch is connected to the thermistor simulation unit.

6. The inspection device for an aircraft fire alarm system according to claim 5, characterized in that: The thermistor simulation unit includes a 5MΩ resistor module and an 8MΩ resistor module; the 5MΩ resistor module and the 8MΩ resistor module are respectively connected to the other end of the second test channel selection switch, and the 5MΩ resistor module and the 8MΩ resistor module are also respectively connected to the fire alarm control box HKH-6A.

7. The inspection device for an aircraft fire alarm system according to claim 1, characterized in that: The fire simulation unit adopts a potentiometer, and the potentiometer is connected to the fire alarm control box HKH-4A.

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