Circuit convenient for self-detection of aviation earphone

Abstract

The utility model discloses a convenient aviation earphone self-detection circuit, which comprises an LM385 module, a capacitor C1 is connected in parallel between a pin 1 and a pin 8 of the LM385 module, a pin 6 of the LM385 module is connected with a power supply and a capacitor C2, a pin 3 of the LM385 module is a signal input end, a pin 5 of the LM385 module is a signal output end, a pin 2 and a pin 4 of the LM385 module are grounded, and a pin 7 of the LM385 module is vacant. According to the utility model, power amplification matching is carried out according to the microphone and the earphone loudspeaker of the aviation ground earphone, the sidetone function of the aviation ground earphone in the onboard digital communication circuit board is simulated, and signals are amplified and reproduced, so that whether the earphone has faults or not is judged according to the sound emitted by the earphone; and the effect of quickly detecting the earphone is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation headset detection, in particular to a device that facilitates self-detection and maintenance of aviation headsets. Background Art

[0002] The aviation headset self-test circuit is an intelligent monitoring system integrated into aviation communication headsets. It is used to evaluate the device status in real time to ensure flight safety. Through the microprocessor core, this circuit automatically detects power supply stability, signal transmission path integrity, audio output clarity, and noise reduction module effectiveness.

[0003] The prior art discloses a headphone testing device, including a function signal generator, a power amplifier circuit, a microphone amplifier circuit, a power supply circuit, a mode switching circuit, a level indication circuit and an external interface circuit. The function signal generator includes a chip U1, a potentiometer RP1 and a potentiometer RP5, the power amplifier circuit includes a chip U2, a diode D2 and a diode D2, the microphone amplifier circuit includes a chip U3 and a speaker L, the mode switching circuit includes a switch S1, and the level indication circuit includes a chip U4. The utility model can perform functional testing on aviation and ground service headphones, saving maintenance personnel time wasted due to functional problems of headphones. At the same time, it provides convenience for headphone maintenance personnel, allowing them to quickly locate headphone faults and facilitate maintenance.

[0004] The circuit of the above device includes a chip U1, a potentiometer RP1 and a potentiometer RP5, and the power amplifier circuit includes a chip U2, a diode D2 and a diode D3. Its structure is relatively complex, so the failure rate is higher.

[0005] Therefore, it is necessary to provide a kind of convenient aviation headset self-detection and maintenance equipment to solve the above-mentioned technical problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the existing technology, the utility model provides a convenient aviation headset self-detection and maintenance device that can simulate the sidetone function of aviation headsets on an aircraft and match the corresponding maintenance combination kit, which can shorten the headset detection time to the greatest extent.

[0007] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0008] The invention provides a convenient aviation headset self-test circuit, including an LM385 module, wherein a capacitor C1 is connected in parallel between pins 1 and 8 of the LM385 module, pin 6 of the LM385 module is connected to a power supply and a capacitor C2, pin 3 of the LM385 module is a signal input terminal, pin 5 is a signal output terminal, pins 2 and 4 of the LM385 module are grounded, and pin 7 of the LM385 module is vacant.

[0009] Preferably, a capacitor C3 is connected in parallel to the 5-pin output terminal of the LM385 module.

[0010] Preferably, the microphone signal is connected to the capacitor C4 and the adjustable resistor R2 through the input terminal.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The utility model matches the power amplifier of the microphone and the earphone speaker of the aviation ground headset, simulates the sidetone function of the aviation ground headset in the digital communication circuit board on the aircraft, and amplifies and reproduces the signal, thereby judging whether the headset has a fault through the sound emitted by the headset, thereby achieving a rapid detection effect on the headset;

[0013] (2) The utility model adjusts the strength of the input signal through the capacitor C4 and the adjustable resistor R2 to achieve stable signal output and amplification effect at the OUT end, thereby driving the full function of the sidetone of the aviation ground headset to detect through signals of different strengths, achieving comprehensive coverage; BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a circuit diagram of the convenient aviation headset self-testing and maintenance equipment provided by the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0016] First embodiment:

[0017] like Figure 1 The figure shows a convenient aviation headset self-test circuit provided by the present invention. It includes an LM385 module with a capacitor C1 connected in parallel between pins 1 and 8 of the LM385 module. An AC / DC transformer provides a 9V power supply to the system through voltage conversion. During power quality testing, a capacitor is coupled to the module to create a subtle ripple in the power supply. This power is then supplied to the circuit's VCC pin to power the module. This ensures that when there is no input signal at the IN pin, a slight current sound can be heard in the headset when an aviation ground headset is plugged into the OUT pin. Initially, due to insufficient gain within the circuit, the output at the OUT pin was insufficient, resulting in no sound. Therefore, a capacitor C1 was connected in parallel between pins 1 and 8 of the module to adjust the gain. To ensure proper output, points 2 and 4 of module A were grounded, and point 7 of module A was disconnected from the circuit, leaving it unused. This ensures that the module and the power supply are compatible, allowing the system to output AC power at the OUT pin with minimal ripple, without damaging the speaker circuit, even when no-loaded.

[0018] This device matches the power amplifier according to the microphone and headphone amplifier speaker of the aviation ground headset, simulates the sidetone function of the aviation ground headset in the on-board digital communication circuit board, amplifies and reproduces the signal, and thus determines whether the headset has a fault through the sound emitted by the headset, achieving a rapid detection effect on the headset.

[0019] Second embodiment:

[0020] like Figure 1 As shown, a capacitor C3 is connected in parallel to the 5-pin output terminal of the LM385 module.

[0021] By setting capacitor C3, the circuit can be decoupled at output, further improving the audio output quality of module A and achieving quiet noise reduction.

[0022] Third embodiment:

[0023] like Figure 1 As shown, the microphone signal is connected to the capacitor C4 and the adjustable resistor R2 through the input terminal.

[0024] The strength of the input signal is adjusted by capacitor C4 and adjustable resistor R2 to achieve stable signal output and amplification effect at the OUT end, thereby driving the full function of the sidetone of the aviation ground headset for detection through signals of different intensities to achieve comprehensive coverage.

[0025] Working Principle: The power amplifier is matched according to the microphone and headphone amplifier speaker of the aviation ground headset, and the sidetone function of the aviation ground headset in the onboard digital communication circuit board is simulated to amplify and reproduce the signal. In this way, the sound emitted by the headset can be used to determine whether the headset has a fault, thereby achieving a rapid detection effect on the headset.

[0026] The above embodiment is only one of the preferred implementation methods of the present invention and should not be used to limit the scope of protection of the present invention. Any changes or modifications that have no substantive meaning made to the main design concept and spirit of the present invention, as long as the technical problems they solve are still consistent with the present invention, should be included in the scope of protection of the present invention.

Claims

1. A convenient aviation headset self-test circuit, characterized in that: include: LM385 module, a capacitor C1 is connected in parallel between pins 1 and 8 of the LM385 module, pin 6 of the LM385 module is connected to the power supply and capacitor C2, pin 3 of the LM385 module is the signal input end, pin 5 is the signal output end, pins 2 and 4 of the LM385 module are grounded, and pin 7 of the LM385 module is vacant.

2. The convenient aviation headset self-test circuit according to claim 1, characterized in that: A capacitor C3 is connected in parallel to the 5-pin output terminal of the LM385 module.

3. The convenient aviation headset self-test circuit according to claim 2, characterized in that: The microphone signal is connected to capacitor C4 and adjustable resistor R2 through the input terminal.

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