Airplane handset audio test bench

Abstract

The utility model relates to the technical field of airplane handset testing, and specifically discloses an airplane handset audio test bench. The airplane handset audio test bench comprises an audio signal generator, a sound production device, a connector, a frequency spectrograph, a voltage tester and an oscilloscope. The audio signal generator is connected to the sounding device. One end of the connector is connected with the frequency spectrograph, the voltage tester and the oscilloscope, and the other end of the connector is a terminal which can be adaptively connected with the handset. The audio signal generator emits audio signals with set decibel values and frequency values, the sounding device receives the audio signals and converts the audio signals into sound signals with standard decibel values and frequency values required by testing, and the handset receives the sound signals and converts the sound signals into the audio signals. The frequency spectrograph, the voltage tester and the oscilloscope are used for testing whether various technical parameters of the audio signals meet the testing requirements or not, so that the performance of the handset can be accurately tested, including the call audio quality of the handset, and various analysis means are configured to accurately detect the call noise fault of the handset.

Description

Technical Field

[0001] This application relates to the field of testing aircraft handheld devices, and more specifically, to an aircraft handheld device audio test stand. Background Art

[0002] Handheld devices are crucial intercom system equipment on aircraft, serving as vital communication tools between flight attendants, pilots, and passengers. Providing high-quality calls adds an extra layer of assurance for flight safety and the quality of service offered by flight attendants. Currently, handheld devices can only be tested by following the test connection diagrams provided in the aircraft's Component Maintenance Manual (CMM). The CMM provides the test connection diagrams as follows: Figure 1 The test connection diagram mainly consists of a DC power supply, a power interface, and the handheld device under test.

[0003] However, sound performance testing requires standard sound source conditions. CMM lacks standard sound sources. Connecting the test according to the connection diagram provided by CMM cannot accurately detect handheld phone call noise faults, and therefore cannot accurately determine whether the sound performance of the handheld phone meets the requirements. Utility Model Content

[0004] To address the issue of inaccurate performance testing of airborne handheld devices, particularly regarding call audio quality, where the CMM testing scheme cannot accurately detect call noise faults, this application provides a dedicated device for testing the sound performance of handheld devices to meet testing requirements and ensure accurate test results. To this end, this application adopts the following technical solution.

[0005] An audio test bench for an aircraft handheld device includes an audio signal generator, a sound-generating device, a connector, a spectrum analyzer, a voltage tester, and an oscilloscope. The audio signal generator is connected to the sound-generating device. One end of the connector is connected to the spectrum analyzer, the voltage tester, and the oscilloscope, while the other end is a terminal block adapted for connecting a handheld device.

[0006] By adopting the above technical solution, the audio signal generator emits an audio signal with a set decibel and frequency value. The sound-generating device receives the audio signal and converts it into a sound signal with the standard decibel and frequency values ​​required for testing. The handheld device receives the sound signal and converts it into an audio signal. The spectrum analyzer, voltage tester, and oscilloscope test whether the various technical parameters of the audio signal meet the test requirements. Therefore, the performance of the handheld device can be accurately tested, including the call audio quality of the handheld device. With multiple analysis methods, the call noise fault of the handheld device can be accurately detected.

[0007] As a preferred embodiment of the aircraft handheld audio test bench, the spectrum analyzer, the voltage tester, and the oscilloscope are connected in parallel and then connected to one end of the connector.

[0008] By adopting the above technical solution, these three instruments are connected in parallel and then connected to the handheld device via a connector. The audio signal of the handheld device can be detected separately, thereby obtaining the call audio performance of the handheld device.

[0009] In a preferred embodiment of the aircraft handheld audio test bench, the test bench further includes a chassis. The audio signal generator, the sound-generating device, the connector, the spectrum analyzer, the voltage tester, and the oscilloscope are all mounted within the chassis. The chassis has a mounting bracket for securing the handheld device; a terminal block is fixedly disposed within the mounting bracket; the terminal block is configured to electrically connect to a handheld device inserted into the mounting bracket. The sound-generating device has a sound outlet; the sound outlet is fixed to the surface of the chassis.

[0010] By adopting the above technical solution, the tester is built into the chassis, and a limiting seat for fixing the handheld unit and a terminal for electrically connecting the handheld unit are set. A fixed sound port is also set. On the one hand, the audio performance of the handheld unit is tested in a system integration manner, which is convenient for wiring. On the other hand, a fixed sound transmission distance is set to ensure the accuracy of the test results.

[0011] In a preferred embodiment of the aircraft handheld audio test bench, the test bench further includes a power input jack. The power input jack is located on the surface of the chassis; the power input jack is electrically connected to the spectrum analyzer, the voltage tester, and the oscilloscope, which are connected in parallel.

[0012] By adopting the above technical solution, the power input port can be used to connect a power source to power the instruments built into the audio test bench.

[0013] In a preferred embodiment of the aircraft handheld audio test bench, the test bench further includes a DC power supply. The DC power supply is connected to the power input jack.

[0014] By adopting the above technical solution, the DC power supply provides power to the instruments built into the audio test bench when testing handheld devices.

[0015] As a preferred embodiment of the aircraft handheld audio test bench, the voltage tester is a millivoltmeter.

[0016] By adopting the above technical solution, the millivoltmeter can accurately sense the voltage changes of audio signals and accurately represent the relevant properties of audio signals.

[0017] As a preferred embodiment of the aircraft handheld audio test bench, the connector is a D-SUB connector.

[0018] By adopting the above technical solution, the D-SUB connector can be compatible with spectrum analyzers, voltage testers, and oscilloscopes.

[0019] As a preferred embodiment of the handheld audio test bench for this aircraft, the sound-generating device is a speaker or loudspeaker.

[0020] By adopting the above technical solution, the speaker or loudspeaker can convert audio signals into sound signals, which are then received and converted by the handheld device to test the audio performance of the handheld device.

[0021] In summary, this application, by designing and manufacturing a dedicated aircraft handheld audio test bench (including test circuitry), and in conjunction with a spectrum analyzer, oscilloscope, millivoltmeter, and audio source, adopts a system integration approach to achieve comprehensive testing of handheld devices, thereby improving the accuracy and efficiency of handheld device audio performance testing.

[0022] The audio signal generator can provide sound signals with standard decibel and frequency values ​​to test whether the output level of the aircraft handheld device meets the requirements. It can also provide audio signals with set decibel and frequency values ​​to the handheld device to test whether the audio emitted by the handheld device's speaker meets the requirements. In conjunction with external instruments such as spectrum analyzers, ammeters, and voltmeters (distortion meters), the handheld device audio test is realized through system integration. Attached Figure Description

[0023] Figure 1 The diagram below illustrates the handheld device test connection principle in CMM, provided as background technology.

[0024] Figure 2 This is a connection schematic diagram of the aircraft handheld audio test stand of this application.

[0025] Figure 3 This is a schematic diagram of the external structure of the aircraft handheld audio test stand of this application.

[0026] Figure reference numerals: 1. Audio signal generator; 2. Sound-generating device; 3. Connector; 4. Spectrum analyzer; 5. Voltage tester; 6. Oscilloscope; 7. Chassis; 8. Limit seat; 9. Sound port; 10. Power input socket; 11. DC power supply. DETAILED DESCRIPTION

[0027] The following description, in conjunction with the accompanying drawings, details the aircraft handheld audio test stand of this application.

[0028] Reference Figure 2 An audio test bench for aircraft handheld devices includes an audio signal generator 1, a sound-generating device 2, a connector 3, a spectrum analyzer 4, a voltage tester 5, and an oscilloscope 6.

[0029] The audio signal generator 1 is connected to the sound-generating device 2.

[0030] One end of the connector 3 is connected to the spectrum analyzer 4, the voltage tester 5, and the oscilloscope 6, while the other end is a connector that can be used to connect a handheld device. The handheld device can be a handheld device for various models of the N40 series aircraft.

[0031] In the aircraft handheld audio test bench, the audio signal generator 1 emits an audio signal with a set decibel and frequency value. The sound-generating device 2 receives the audio signal and converts it into a sound signal with the standard decibel and frequency values ​​required for the test. The handheld device receives the sound signal and converts it into an audio signal. The spectrum analyzer 4, voltage tester 5, and oscilloscope 6 test whether the various technical parameters of the audio signal meet the test requirements. Therefore, the performance of the handheld device can be accurately tested, including the call audio quality of the handheld device. With multiple analysis methods, the handheld device can accurately detect call noise faults.

[0032] To simplify the wiring, the spectrum analyzer 4, the voltage tester 5, and the oscilloscope 6 are connected in parallel and then connected to one end of the connector 3. These three instruments, connected in parallel, are connected to the handheld device via connector 3, allowing for individual detection of the handheld device's audio signal and thus determining its call audio performance.

[0033] Please refer to Figure 3 To improve the accuracy of the test results, the aircraft handheld audio test bench is integrated into a chassis 7. The audio signal generator 1, the sound-generating device 2, the connector 3, the spectrum analyzer 4, the voltage tester 5, and the oscilloscope 6 are housed within the chassis 7. The chassis 7 has a mounting bracket 8 that accommodates and secures the handheld device. The terminal block is also fixed within the mounting bracket 8 and is configured to electrically connect to the handheld device inserted into the mounting bracket 8. The sound-generating device 2 has a sound outlet 9, which is fixed to the surface of the chassis 7.

[0034] In the above scheme, the tester is built into the chassis 7, and a limiting seat 8 for fixing the handheld unit and a terminal for electrically connecting the handheld unit are set. A fixed sound port 9 is also set. On the one hand, the audio performance of the handheld unit is tested in a system integration manner, which is convenient for wiring. On the other hand, a fixed sound transmission distance is set to ensure the accuracy of the test results.

[0035] Optionally, the aircraft handheld audio test bench also includes a power input jack 10. The power input jack 10 is located on the surface of the chassis 7; the power input jack 10 is electrically connected to the spectrum analyzer 4, the voltage tester 5, and the oscilloscope 6, which are connected in parallel. The power input jack 10 can be used to connect a power source to power the instruments built into the audio test bench.

[0036] Optionally, the aircraft handheld audio test bench also includes a DC power supply 11. The DC power supply 11 is connected to the power input port 10. The DC power supply 11 provides power to the instruments built into the audio test bench when testing the handheld device.

[0037] Furthermore, this aircraft handheld audio test bench can also perform Hall switch tests, self-test functions, and button / display tests on the handheld device. The test steps are as follows:

[0038] 1. When the handheld device is inserted into the limit seat 8, the Hall switch of the handheld device is turned off, the power of the handheld device is turned off, and the button lights and display screen are turned off.

[0039] 2. After the handheld device is powered on, it will automatically start a self-test program and enter standby mode after the self-test is completed.

[0040] 3. With the handheld device in standby mode, press each button on the handheld device one by one. The display screen will light up and show the corresponding button symbols.

[0041] Optionally, the voltage tester 5 can be a millivoltmeter. A millivoltmeter can accurately sense voltage changes in audio signals and precisely represent the relevant properties of the audio signals.

[0042] Optionally, the connector 3 is a D-SUB connector 3, which is compatible with connecting the spectrum analyzer 4, voltage tester 5, and oscilloscope 6.

[0043] Optionally, the sound-generating device 2 can be a speaker enclosure or a loudspeaker. The speaker enclosure or loudspeaker can convert audio signals into sound signals, which are received and converted by the handheld device to test its audio performance. In the generating device, the electrical signal is first converted into alternating current by an amplifier. This current interacts with the coil and magnet in the loudspeaker, causing the coil to be driven and generating mechanical vibration. This vibration is transmitted through the loudspeaker diaphragm into the gaseous medium, ultimately converting into a sound signal.

[0044] This aircraft handheld radio audio test bench can provide standard decibel and frequency audio values ​​to test whether the output level of the aircraft handheld radio meets the requirements. It can also provide a standard voltage to the handheld radio to test whether the audio emitted by its speaker meets the requirements. Combined with external instruments such as a spectrum analyzer, ammeter, and voltmeter (distortion meter), it achieves handheld radio audio distortion testing through system integration, solving the problem of difficult-to-accurate diagnosis of noise faults in aircraft handheld radios, improving the testing quality and efficiency of aircraft handheld radios, and meeting the needs of handheld radio maintenance.

[0045] The above are merely some embodiments of this application. The scope of protection of this application is not limited to the above embodiments. For those skilled in the art, any improvements and modifications made without departing from the inventive design of this application should also fall within the scope of protection claimed by this application.

Claims

1. An aircraft handheld audio test stand, characterized in that, It includes an audio signal generator (1), a sound-generating device (2), a connector (3), a spectrum analyzer (4), a voltage tester (5), and an oscilloscope (6). The audio signal generator (1) is connected to the sound-generating device (2); One end of the connector (3) is connected to the spectrum analyzer (4), the voltage tester (5) and the oscilloscope (6), and the other end is a terminal that can be adapted to connect to a handheld device.

2. The aircraft handheld audio test stand according to claim 1, characterized in that, The spectrum analyzer (4), the voltage tester (5), and the oscilloscope (6) are connected in parallel and then connected to one end of the connector (3).

3. The aircraft handheld audio test stand according to claim 2, characterized in that, The aircraft handheld audio test bench also includes a chassis (7); the audio signal generator (1), the sound-generating device (2), the connector (3), the spectrum analyzer (4), the voltage tester (5) and the oscilloscope (6) are all installed in the chassis (7); The chassis (7) has a limiting seat (8) that can be fitted to fix a handheld device; the terminal is fixedly disposed in the limiting seat (8); the terminal is configured to be electrically connected to a handheld device inserted into the limiting seat (8); The sound-generating device (2) has a sound-generating port (9); the sound-generating port (9) is fixed to the surface of the chassis (7).

4. The aircraft handheld audio test stand according to claim 3, characterized in that, The aircraft handheld audio test bench also includes a power input port (10); the power input port (10) is located on the surface of the chassis (7); the power input port (10) is electrically connected to the spectrum analyzer (4), the voltage tester (5) and the oscilloscope (6) connected in parallel.

5. The aircraft handheld audio test stand according to claim 4, characterized in that, The aircraft handheld audio test stand also includes a DC power supply (11); the DC power supply (11) is connected to the power input port (10).

6. The aircraft handheld audio test stand according to claim 1, characterized in that, The voltage tester (5) is a millivoltmeter.

7. The aircraft handheld audio test stand according to claim 1, characterized in that, The connector (3) is a D-SUB connector (3).

8. The aircraft handheld audio test stand according to claim 1, characterized in that, The sound-generating device (2) is a speaker or loudspeaker.

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