A voice alarm detection device

Abstract

This utility model relates to the field of aircraft airborne equipment testing technology, and discloses a voice alarm device testing device, including a signal input circuit, a power supply circuit, an alarm information simulation source, and a working status detection circuit. The power supply circuit is electrically connected to the signal input circuit, the alarm information simulation source, and the working status detection circuit. The alarm information simulation source is connected to the voice alarm device under test through the signal input circuit, and the working status detection circuit is connected to the voice alarm device under test. This utility model can accurately simulate abnormal signals of key parts of the helicopter through the alarm information simulation source, realizing comprehensive performance testing of the voice alarm device under complex on-board conditions, and detecting voice alarm device faults in advance before installation, avoiding repeated disassembly and assembly caused by discovering the problem only when the helicopter is powered on after installation, thus significantly reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of aircraft airborne equipment testing technology, specifically to a voice alarm detection device. Background Technology

[0002] In the safety operation system of aircraft such as helicopters, voice warning systems are one of the key devices for ensuring flight safety. Their core function is to monitor the operational status of critical helicopter systems in real time, specifically including:

[0003] Fire alarm signal in the engine compartment;

[0004] The hydraulic pressure in the left and right hydraulic tanks (normal range is usually 115×10) 5 Pa ~ 145 × 10 5 Pa) and oil level (critical value is 3L);

[0005] The lubricating oil pressure of the main reducer (critical value is 1.5 × 10⁻⁶) 5 Pa) and lubricating oil temperature (critical value is 125℃).

[0006] When the above parameters exceed the safety threshold, the voice alarm will immediately report the fault information to the crew through voice signal and simultaneously output a flashing signal of the main alarm light (typically a pulse signal with a frequency of 90Hz and an amplitude of ≥15V), thereby achieving a rapid early warning of dangerous conditions.

[0007] However, existing detection methods for this voice alarm device have significant drawbacks:

[0008] Lack of dedicated testing equipment: The factory is not currently equipped with testing devices that can simulate the actual working conditions of helicopters, making it impossible to fully verify the performance of the alarm before installation, which leads to the risk of installing faulty alarms directly.

[0009] Delayed fault detection: If the fault is only discovered after the helicopter is powered on, the alarm device needs to be disassembled, repaired and reinstalled, resulting in a lot of repetitive work and significantly increasing maintenance costs.

[0010] Fault location is difficult: Due to the lack of detection methods under power-on conditions, it is impossible to accurately locate the fault point of the alarm (such as signal reception, voice output, lighting control, etc.), resulting in low maintenance efficiency and directly affecting production progress and helicopter uptime.

[0011] Safety hazards: Alarm devices that have not undergone rigorous testing may produce false alarms or miss alarms during flight, posing a potential threat to flight safety.

[0012] Therefore, developing a device that can simulate the actual working conditions of a helicopter and achieve comprehensive testing of the performance of the voice alarm system has become the key to solving the above problems. Utility Model Content

[0013] The purpose of this invention is to provide a voice alarm detection device, which can accurately simulate abnormal signals of key parts of a helicopter through an alarm information simulation source, realize comprehensive performance testing of the voice alarm under complex on-board conditions, and detect voice alarm faults in advance before installation, avoiding repeated disassembly and reassembly caused by discovering the problem only when the helicopter is powered on after installation, thus greatly reducing maintenance costs.

[0014] This utility model is achieved through the following technical solution:

[0015] A voice alarm detection device includes a signal input circuit, a power supply circuit, an alarm information simulation source, and a working status detection circuit. The power supply circuit is electrically connected to the signal input circuit, the alarm information simulation source, and the working status detection circuit. The alarm information simulation source is connected to the voice alarm to be tested through the signal input circuit, and the working status detection circuit is connected to the voice alarm to be tested.

[0016] In this solution, the power supply circuit provides power to the signal input circuit, alarm information simulation source, and working status detection circuit, ensuring stable operation of each module. The alarm information simulation source transmits simulated on-board abnormal signals to the voice alarm device under test through the signal input circuit, simulating actual operating conditions to trigger the alarm device's alarm response. The working status detection circuit is directly connected to the voice alarm device under test to capture and analyze the alarm device's output parameters after receiving the simulated signal. The three circuits are connected to form a complete detection closed loop, enabling the device to realize the entire process from analog signal input to alarm device status detection, and to achieve comprehensive testing of the voice alarm device's performance.

[0017] In a further technical solution, the alarm information simulation source can simulate multiple alarm signals, including the right hydraulic system abnormal signal, the left hydraulic system abnormal signal, the main reducer abnormal signal, and the engine compartment fire alarm signal. This ensures that the detection device can fully reproduce the complex alarm triggering conditions on the aircraft, so that the entire detection device not only has basic detection capabilities, but can also specifically verify the alarm device's identification and response performance for different fault types.

[0018] A further technical solution is that the abnormal signal of the right hydraulic system is that the right hydraulic pressure is lower than 115×10. 5 Pa ~ 145 × 10 5 The simulated signal is Pa and the right liquid level is below 3L; the abnormal signal of the left hydraulic system is that the left hydraulic pressure is below 115×10. 5 Pa ~ 145 × 105 The simulated signal of Pa and the left liquid level being lower than 3L is used to limit the specific parameters of the abnormal signals of the right and left hydraulic systems. This ensures that the signal generated by the alarm information simulation source is completely matched with the real fault threshold of the hydraulic system in actual helicopter operation, and that the response of the voice alarm device under test under the trigger of the simulated signal can truly reflect its ability to identify abnormalities in the hydraulic system.

[0019] A further technical solution is that the abnormal signal of the main reducer is that the lubricating oil pressure of the main reducer is lower than 1.5 × 10⁻⁶. 5 The simulated signal with Pa or lubricating oil temperature above 125℃, by clearly defining the specific parameters and triggering conditions of the main gearbox abnormal signal, ensures that the signal generated by the alarm information simulation source is completely matched with the actual fault threshold of the helicopter main gearbox in actual operation, and ensures that the response of the voice alarm device under test under the action of the simulated signal can truly reflect its ability to identify and alarm the main gearbox fault.

[0020] A further technical solution also includes an alarm indicator light, which is connected in series between pin 20 of the plug of the voice alarm device under test and ground. The alarm indicator light can directly reflect whether the alarm device has output an alarm signal through its own on / off state, providing the testing personnel with a convenient real-time judgment basis, enabling them to quickly confirm whether the alarm device has triggered an alarm response after receiving a simulated abnormal signal.

[0021] A further technical solution is provided: when the voice alarm device under test has an alarm message, its plug pin 20 outputs a pulse signal with a frequency of 90Hz and an amplitude of not less than 15V. The alarm indicator light is lit during the pulse, thereby further improving the accuracy of the test results and ensuring that the verification of the alarm function of the voice alarm device is both intuitive and accurate.

[0022] A further technical solution also includes a reset circuit, which is connected to the voice alarm device under test. The reset circuit can provide working voltage to the internal sound deactivation circuit of the voice alarm device under test through a reset switch, so that the tester can complete multiple rounds of testing in different scenarios in a single device connection state without repeatedly disassembling or restarting the device. This not only improves the testing efficiency, but also avoids the damage to the device caused by frequent operation.

[0023] In a further technical solution, the working status detection circuit is connected to an earphone, multimeter, or oscilloscope for detecting alarm sound quality, frequency, and alarm amplitude parameters, thereby further improving the professionalism of the detection device and the reliability of the detection results.

[0024] A further technical solution also includes a detection interface, which includes an audio voltage detection interface and a light signal interface. Both the audio voltage detection interface and the light signal interface are connected to the voice alarm device under test, so that different types of detection parameters can be independently acquired through the corresponding interface, avoiding signal mixing that affects detection accuracy.

[0025] In a further technical solution, the audio voltage detection interface is used to connect to an oscilloscope to detect the amplitude of the audio voltage output by the voice alarm device under test; the light signal interface is used to connect to an oscilloscope to detect the frequency of the light signal output by the voice alarm device under test, ensuring the consistency and accuracy of parameter measurements under different testing scenarios.

[0026] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0027] 1. This utility model solves the problem of lacking dedicated equipment to simulate on-board conditions in traditional technology by integrating signal input circuit, power supply circuit, alarm information simulation source and working status detection circuit, as well as designing to simulate abnormal signals of key helicopter systems. It realizes comprehensive performance testing of the voice alarm device before installation and avoids repeated disassembly and assembly and increased maintenance costs caused by directly installing faulty equipment.

[0028] 2. This utility model, with the help of alarm indicator lights, reset circuits, and dedicated testing interfaces, can intuitively determine the alarm status, conveniently control alarm activation and deactivation, and accurately detect alarm sound quality, frequency, amplitude, and other parameters using tools such as oscilloscopes. This solves the problem of traditional methods being unable to locate faults, significantly improving fault diagnosis efficiency and ensuring production progress. At the same time, by strictly simulating actual fault thresholds, it ensures that the test results are highly consistent with the actual operating conditions on the aircraft, effectively reducing the safety hazards of false alarms or missed alarms during flight, providing strong protection for helicopter flight safety, and comprehensively improving the professionalism, reliability, and ease of operation of the testing. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the experiment of this utility model;

[0031] Figure 2 This is the internal circuit diagram of this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0033] Example

[0034] This embodiment provides a voice alarm detection device, such as Figures 1-2 As shown, it includes a signal input circuit, a power supply circuit, an alarm information analog source, and a working status detection circuit.

[0035] like Figures 1-2 As shown, the power supply circuit consists of a 220V AC input interface, a rectifier and filter unit, a DC-DC converter chip, and a voltage regulator circuit. It can output two DC voltages, +12V and +5V, to provide stable power to the signal input circuit, alarm information analog source, working status detection circuit, and voice alarm device under test of the entire detection device, ensuring that each module operates reliably under rated voltage.

[0036] like Figures 1-2 As shown, the alarm information simulation source consists of a microcontroller, a D / A conversion module, and a signal conditioning circuit. It can generate six independent analog alarm signals to simulate abnormal signals of critical helicopter systems, specifically including:

[0037] Right hydraulic system abnormal signal: Simulated right hydraulic pressure is lower than 115×10 5 Pa ~ 145 × 10 5 A composite signal where Pa and the right liquid level is below 3L;

[0038] Left hydraulic system abnormal signal: Simulated left hydraulic pressure is lower than 115×10 5 Pa ~ 145 × 10 5 A composite signal where Pa and the left liquid level is below 3L;

[0039] Main reducer abnormal signal: Simulated lubricating oil pressure is lower than 1.5 × 10⁻⁶. 5 The selection signal is Pa or lubricating oil temperature above 125℃;

[0040] Engine compartment fire alarm signals: including switch signals for engine compartment fire alarm No. 1 and engine compartment fire alarm No. 2 (including 2-way redundant design).

[0041] The above signals can be output individually or in combination as needed to accurately reproduce onboard fault scenarios.

[0042] like Figures 1-2As shown, the signal input circuit consists of terminals, a signal isolation unit, and an impedance matching circuit. The input terminal is connected to the alarm information analog source, and the output terminal is connected to the signal input terminal of the voice alarm device under test via a dedicated plug. During operation, the analog signal generated by the alarm information analog source is isolated and impedance matched before being safely and without distortion transmitted to the voice alarm device under test, thus avoiding damage to the alarm device caused by signal interference or voltage fluctuations.

[0043] like Figures 1-2 As shown, the working status detection circuit consists of a signal acquisition module, a filtering circuit, and a data interface. The input end is connected to the output end of the voice alarm device under test, and the output end can be connected to an external testing tool. During operation, it acquires the output parameters of the voice alarm device under test after receiving the analog signal, including the sound quality, frequency, and voltage amplitude of the voice alarm signal, as well as the pulse characteristics of the light alarm signal, and modulates the signal into a form suitable for the testing tool to recognize.

[0044] In this embodiment, an alarm indicator light is also included. The alarm indicator light is an NXD-212 LED indicator light, which is connected in series with the plug pin 20 of the voice alarm device under test and ground via a wire. The surface of the indicator light is provided with a light-transmitting protective cover. When the alarm device outputs an alarm signal, its plug pin 20 will generate a pulse signal with a frequency of 90Hz and an amplitude of ≥15V, which drives the indicator light to flash synchronously, making it easy for the testing personnel to quickly determine whether the alarm device has responded.

[0045] In this embodiment, a reset circuit is also included. The reset circuit consists of a reset switch, a relay, and a voltage divider circuit. The input terminal is connected to the +12V output of the power supply circuit, and the output terminal is connected to the "audio deactivation" interface of the voice alarm device under test through a wire. By manually pressing the reset switch, the relay is activated, providing a +5V operating voltage to the audio deactivation circuit inside the alarm device, so that the alarm device stops the voice output and returns to the standby state. This supports cyclic testing of multiple sets of signals in a single test.

[0046] In some embodiments, an audio voltage detection interface and a light signal interface are also included. The audio voltage detection interface is used to connect to an oscilloscope to detect the amplitude of the audio voltage output by the voice alarm device under test. The light signal interface is used to connect to an oscilloscope to detect the frequency of the light signal output by the voice alarm device under test, ensuring the consistency and accuracy of parameter measurements under different testing scenarios.

[0047] Working principle: During testing, after the power supply circuit provides power, the operator selects the required analog signal (such as "Fire alarm in engine compartment No. 1") through the alarm information analog source. The signal is transmitted to the voice alarm device under test through the signal input circuit. If the alarm device functions normally, it will simultaneously output a voice alarm (the sound quality is monitored by connecting an external headphone through the working status detection circuit) and a light signal (driving the alarm indicator light to flash). At this time, an oscilloscope can be connected through the test interface to verify the audio voltage amplitude (whether it meets the design value) and the light signal frequency (whether it is 90Hz±5Hz). After the test is completed, press the reset circuit switch to stop the alarm, and you can switch to the next set of signal tests.

[0048] In summary, this embodiment, through modular design, achieves full-condition simulation testing of helicopter voice alarm devices, solving the problems of fault installation and low testing efficiency in the prior art.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A voice alarm detection device, characterized in that, It includes a signal input circuit, a power supply circuit, an alarm information simulation source, and a working status detection circuit. The power supply circuit is electrically connected to the signal input circuit, the alarm information simulation source, and the working status detection circuit. The alarm information simulation source is connected to the voice alarm device under test through the signal input circuit, and the working status detection circuit is connected to the voice alarm device under test.

2. The voice alarm detection device according to claim 1, characterized in that, The alarm information simulation source can simulate multiple alarm signals, including the right hydraulic system abnormal signal, the left hydraulic system abnormal signal, the main reducer abnormal signal, and the engine compartment fire alarm signal.

3. The voice alarm detection device according to claim 2, characterized in that, The right hydraulic system abnormal signal is an analog signal of right hydraulic pressure lower than 115 x 10 5 Pa and right liquid level lower than 3L; the left hydraulic system abnormal signal is an analog signal of left hydraulic pressure lower than 115 x 10 5 Pa and left liquid level lower than 3L. 5 Pa and left liquid level lower than 3L. 5 Pa and left liquid level lower than 3L.

4. The voice alarm detection device according to claim 2, characterized in that, The abnormal signal from the main reducer is that the lubricating oil pressure of the main reducer is lower than 1.5 × 10⁻⁶. 5 Pa or an analog signal indicating that the lubricating oil temperature is higher than 125°C.

5. The voice alarm detection device according to claim 1, characterized in that, It also includes an alarm indicator light, which is connected in series between pin 20 of the plug of the voice alarm device under test and ground.

6. The voice alarm detection device according to claim 5, characterized in that, When the voice alarm device under test has an alarm message, its plug pin 20 outputs a pulse signal with a frequency of 90Hz and an amplitude of not less than 15V, and the alarm indicator light illuminates during the pulse.

7. The voice alarm detection device according to claim 1, characterized in that, It also includes a reset circuit, which is connected to the voice alarm device under test. The reset circuit can provide operating voltage to the internal sound deactivation circuit of the voice alarm device under test through a reset switch.

8. The voice alarm detection device according to claim 1, characterized in that, The working status detection circuit is connected to an earphone, multimeter, or oscilloscope for detecting alarm sound quality, frequency, and alarm amplitude parameters.

9. The voice alarm detection device according to claim 8, characterized in that, It also includes a detection interface, which includes an audio voltage detection interface and a light signal interface, both of which are connected to the voice alarm device under test.

10. A voice alarm detection device according to claim 9, characterized in that, The audio voltage detection interface is used to connect to an oscilloscope to detect the amplitude of the audio voltage output by the voice alarm device under test; the light signal interface is used to connect to an oscilloscope to detect the frequency of the light signal output by the voice alarm device under test.

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