Portable automatic testing device for digital in-vehicle interphone

Abstract

The utility model provides a portable automatic testing device for a digital in-vehicle interphone. The portable automatic testing device comprises a controller, a measurer and a power supply module which are electrically connected, the controller comprises a central processing unit, a display, a mouse, a touch panel and an interface adapter; the measurer comprises a sound card, a controllable relay module, a 2Hz oscillation module and an audio resistance potential-divider network; the power supply module supplies power to the tested interphone, the interface adapter, the controllable relay module and the 2Hz oscillation module. The utility model provides a portable automatic testing device for a digital in-vehicle interphone, which can realize quick fault positioning of in-vehicle interphones such as armors and tanks in a vehicle, and avoids the complexity that a traditional in-vehicle interphone testing device needs a plurality of instruments and equipment and the in-vehicle interphone can be detected and maintained only after being detached out of the vehicle. And meanwhile, required reports and tables are automatically generated according to automatically tested numerical values, so that the requirement of troop rapid guarantee is met.

Description

Technical Field

[0001] This utility model relates to the field of audio, and in particular to a portable automatic testing device for digital in-vehicle intercoms. Background Technology

[0002] Intercoms are currently the dominant communication method in military armored vehicles and tanks, playing a crucial role in field training, live-fire exercises, and actual combat. Armored vehicles and tank radios now employ frequency hopping and key technologies to enhance their security and anti-jamming capabilities. Correspondingly, this places higher demands on the security and anti-jamming capabilities of the intercoms and their auxiliary testing equipment.

[0003] Traditional testing equipment for vehicle intercoms has the following shortcomings: First, vehicle intercoms require constant maintenance during intensive training and live-fire exercises. However, traditional maintenance equipment is diverse and bulky. If a vehicle intercom malfunctions, it must be disassembled one by one and taken to the outside of the armor or tank for testing and repair. Therefore, disassembly and assembly are cumbersome and the repair time is long, failing to meet the requirements of rapid support for the troops. Second, military armor and tank overhaul units often need to perform secondary testing on various vehicle intercoms. Traditional testing and maintenance rely on manual testing and recording, which consumes a lot of time, manpower, material resources, and financial resources, resulting in low efficiency and high costs.

[0004] Currently, there is no automated testing device in China capable of detecting intercom malfunctions inside armored vehicles or tanks.

[0005] Therefore, it is necessary to provide a portable automatic testing device for digital in-vehicle intercoms to solve the above-mentioned technical problems. Utility Model Content

[0006] To address the aforementioned deficiencies and shortcomings, the purpose of this invention is to provide an automatic testing device for digital in-vehicle intercoms. This device utilizes a ruggedized laptop equipped with a dedicated intelligent test circuit board to meet the testing requirements of existing in-vehicle intercoms, namely, various performance tests on the input audio signal amplitude of 7mV, the time interval of 500ms, and the audio signal output from the passenger box.

[0007] This utility model provides a portable automatic testing device for a digital in-vehicle intercom, comprising: an electrically connected controller, a measuring instrument, and a power module; the controller includes a central processing unit, a display, a mouse and touchpad, and an interface adapter; the measuring instrument includes a sound card, a controllable relay module, a 2Hz oscillation module, and an audio resistor voltage divider network; the power module supplies power to the intercom under test, the interface adapter, the controllable relay module, and the 2Hz oscillation module; the power supply voltages are: 27V for the intercom under test; 5V for the interface adapter; and 12V for the controllable relay module and the 2Hz oscillation module; the 2Hz oscillation module synthesizes square wave signals with intervals of approximately 500ms using an integrated circuit CD4060BE and a 2048kHz crystal.

[0008] Preferably, the controller is powered by AC220V, and the power supply for the self-made control motherboard is provided by a power module. The central processing unit is connected to the monitor and touchpad through the internal interface of the industrial control computer, connected to the mouse through the USB interface, and connected to the control motherboard in the industrial control computer through the RS232 interface, RS485 interface, and discrete interface. The control motherboard includes the original motherboard of the industrial control computer and the self-made control motherboard. The self-made control motherboard consists of a power filtering circuit, a power protection circuit, various interface circuits, and various interface protection circuits.

[0009] Preferably, the power supply of the measuring device is DC12V and DC5V. The first resistor divider network divides the 1kHz audio signal output from the sound card into a continuous 7mV or 220mV audio signal. This signal is modulated by a 2Hz oscillation module to generate an intermittent audio signal with an interval of about 500ms. This signal is output to the noise reduction module of the tested occupant box 1 via a controllable relay module and an interface adapter. The 7V continuous audio signal output from occupant box 2 is sent to the second resistor divider network via a controllable relay module to attenuate the higher amplitude audio signal. The attenuated lower amplitude audio signal is sent to the sound card of the industrial control computer. After processing by the sound card testing stage, the final data is saved to the database by the central processing unit for easy retrieval when needed.

[0010] Compared with related technologies, the portable automatic testing device for digital in-vehicle intercoms provided by this utility model has the following advantages:

[0011] This utility model provides a portable automatic testing device for digital vehicle intercoms, which can quickly locate faults in vehicle intercoms such as armored vehicles and tanks inside the vehicle. It avoids the cumbersome process of traditional vehicle intercom testing equipment that requires numerous instruments and equipment and the need to disassemble the intercom to the outside of the vehicle for testing and repair. At the same time, it automatically generates the required reports and forms from the test values, meeting the requirements of rapid support for the military.

[0012] Specifically, the portable automatic testing device for digital in-vehicle intercoms can automatically turn on or off the following modules according to the instructions of the human-machine interface: power module, 2Hz oscillation module, controllable relay module, various interface modules, audio and radio working mode switching interface, and various channel switching interfaces such as audio, radio, and passenger box. This allows for the automatic testing of the functions of passenger box 1 and passenger box 2, the audio interfaces of box 1 and box 2, and the radio interface performance of box 1. Its built-in sound card, acquisition card, and 2Hz oscillation module replace the audio signal source, millivoltmeter, and distortion tester required by traditional in-vehicle intercom testing equipment; the built-in power module replaces the regulated DC power supply required by traditional in-vehicle intercom testing equipment; and the controllable relay module replaces dozens of audio cables required by traditional in-vehicle intercom testing equipment. These measures greatly save on the use of complex and diverse testing instruments and various testing cables. The portability and miniaturization save testing space, significantly reducing testing and maintenance costs and improving testing and maintenance efficiency. Attached Figure Description

[0013] Figure 1 This is a structural block diagram of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0014] Figure 2 This is a block diagram illustrating the composition and principle of the controller of this utility model;

[0015] Figure 3 This is a block diagram illustrating the composition and principle of the measuring instrument of this utility model;

[0016] Figure 4 This is a schematic diagram of the 2Hz oscillation principle of this utility model;

[0017] Figure 5 This is a block diagram of the power supply principle of this utility model;

[0018] Figure 6 This is a block diagram of the external interface of this utility model;

[0019] Figure 7 This utility model relates to a user interface for a portable automatic testing device for a digital in-vehicle intercom;

[0020] Figure 8 This is a front view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0021] Figure 9 This is a left view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0022] Figure 10 This is a right view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0023] Figure 11 This is a rear view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0024] Figure 12 This is a top view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0025] Figure 13 This is a bottom view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model;

[0026] Figure 14 This is an outline drawing of a portable automatic testing device for a digital in-vehicle intercom, according to this utility model. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Please refer to the following: Figures 1 to 14 ,in, Figure 1 This is a structural block diagram of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 2 This is a block diagram illustrating the composition and principle of the controller of this utility model;

[0029] Figure 3 This is a block diagram illustrating the composition and principle of the measuring instrument of this utility model; Figure 4 This is a schematic diagram of the 2Hz oscillation principle of this utility model; Figure 5 This is a block diagram of the power supply principle of this utility model; Figure 6 This is a block diagram of the external interface of this utility model; Figure 7 This utility model relates to a user interface for a portable automatic testing device for a digital in-vehicle intercom; Figure 8 This is a front view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 9 This is a left view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 10 This is a right view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 11 This is a rear view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 12 This is a top view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 13 This is a bottom view of a portable automatic testing device for a digital in-vehicle intercom according to this utility model; Figure 14 This is an outline drawing of a portable automatic testing device for a digital in-vehicle intercom, according to this utility model.

[0030] This utility model provides a portable automatic testing device 1 for digital in-vehicle intercoms, including an electrically connected controller 2, a measuring device 3, and a power supply module 4.

[0031] The controller 2 includes a central processing unit 6, a display 7, a mouse and touchpad 8, and an interface adapter 9.

[0032] The measuring device 3 includes a sound card 10, a controllable relay module 11, a 2Hz oscillation module 12, and an audio resistor divider network 13.

[0033] The power supply module 4 supplies power to the transceiver device 5, interface adapter 9, controllable relay module 11, and 2Hz oscillation module 12. The power supply voltages are as follows: 27V for transceiver device 5; 5V for interface adapter 9; and 12V for controllable relay module 11 and 2Hz oscillation module 12.

[0034] The 2Hz oscillation module 12 generates square wave signals with an interval of about 500ms by synthesizing integrated circuit CD4060BE and crystal 2048KHz.

[0035] The power supply for controller 2 is AC220V, and the power supply for the self-made control motherboard is provided by power module 4. The central processing unit 6 is connected to the display 7 and touchpad 8 through the internal interface of the industrial control computer, connected to the mouse 8 through the USB interface, and connected to the control motherboard in the industrial control computer through RS232 interface, RS485 interface, and discrete interface. The control motherboard includes the original motherboard of the industrial control computer and the self-made control motherboard. The self-made control motherboard consists of power filtering circuit, power protection circuit, various interface circuits, and various interface protection circuits.

[0036] The power supply for the measuring device 3 is DC12V and DC5V. The first resistor divider network divides the 1kHz audio signal output from the sound card into a continuous 7mV or 220mV audio signal. This signal is modulated by the 2Hz oscillation module 12 to generate an intermittent audio signal with an interval of about 500ms. This signal is output to the noise reduction module of the tested occupant box 1 via the controllable relay module 11 and the interface adapter 9. The 7V continuous audio signal output from occupant box 2 passes through the controllable relay module to the second resistor divider network, which attenuates the higher amplitude audio signal. The attenuated lower amplitude audio signal is sent to the sound card of the industrial control computer. After processing by the sound card testing stage, the final data is saved to the database by the central processing unit 6 for easy retrieval when needed.

[0037] The controllable relay module 11 is an RS232 / RS485 control relay module. It can be connected to the controller 2 via a serial port (or a USB-to-serial adapter if there is no serial port) using an industrial computer to control the required terminals. The interface uses a switch output with normally open and normally closed contacts. The control software allows users to freely set the status of each channel and has a simple interface for easy use.

[0038] The RS232 uses a common DB9 serial port interface (using a straight-through cable, not a crossover cable), and the communication protocol uses a checksum verification, which can effectively prevent controller malfunctions caused by interference.

[0039] The controllable relay module 11 displays the status of each channel. When the mouse is clicked, the corresponding relay will activate. After reading, the status changes with the module. The name of each channel in the channel status can be modified, and the software name can also be modified. It can realize the control of different channels with a single command.

[0040] Power module 4 consists of AC 220V to DC 12V and DC 5V converters, plus a DC 12V power filter, a DC 5V power filter, a DC 12V filter circuit, a DC 5V filter circuit, and a 3.3V power chip. It converts AC 220V to DC 12V / 5A, DC 5V / 4A, and DC 3.3V / 2A power supplies to power modules such as the controller and measuring instruments.

[0041] Interface adapter 9 is a portable automatic testing device 1 for digital in-vehicle intercoms, providing various interfaces. The discrete interface has 3 inputs and 3 outputs (belonging to the 188# series). Inputs are provided as 7mV or 220mV intermittent audio signals to the passenger box and radio input ports, while outputs are provided as 7V continuous audio signals to the interface adapter 9 input ports. Two interfaces conforming to the RS-232 bus standard are included: one for switching between different radio models; the other for RS-232 bus data monitoring. Two USB ports provide users with USB device interfaces. Two power interfaces provide power to the testing equipment.

[0042] This utility model discloses a portable automatic testing device for a digital vehicle intercom. Based on a tablet computer, it is equipped with a military-grade external casing to facilitate portability and maintenance for the PLA's armored and tank units during field training environments. The tablet computer housed within this casing is waterproof, dustproof, shockproof, and resistant to electromagnetic interference, ensuring the proper storage of important test data even in harsh environments. Various communication interfaces required for testing are provided on the outer perimeter of the casing.

[0043] The controller's central processing unit (CPU) is the core of the controller, internally including a display and control module and an interface adapter. The display and control module includes the CPU, a monitor, and a mouse or touchpad. The CPU connects to the monitor via the motherboard's display interface and to the mouse via a USB interface. The interface adapter includes a 485 bus interface module, a 232 bus interface module, and a discrete signal interface module. External interfaces of the interface adapter include an RS232 bus interface, a discrete signal interface, a power interface, an audio signal input / output interface, a radio interface, a passenger interface, and a USB interface. The controller host is based on the Windows 7 operating system and installs our company's self-developed 188 series in-vehicle intercom test system [referred to as: 188 series intercom test program] V1.0, realizing full-function control and bus data monitoring of the device under test. This system was registered with the National Copyright Administration on January 17, 2025, registration number: 2025SR0119538, certificate number: Software Copyright Registration No. 14775736.

[0044] The central processing unit (CPU) is connected to the interface adapter via an RS232 interface and a discrete interface.

[0045] The measuring device mainly includes a sound card, an audio resistor voltage divider network, a 2Hz oscillation module, and a controllable relay module, which realizes the measurement of various functions and performance indicators of the in-vehicle intercom and the transmission of measurement data.

[0046] The controllable relay module is powered by software to control the switching of the relay path, allowing different audio signals to be transmitted through the relay path, thereby automatically testing the performance indicators of the in-vehicle intercom.

[0047] The power module enables the distribution and management of the external 220V AC power supply to the relevant internal modules of the automatic testing device, as well as the conversion and filtering of DC power; it provides AC 220V / 2A and DC 5V / 3A power to the controller; it provides DC 12V / 3A power to the intercom under test; and it provides DC 5V / 5A power to the measuring instrument.

[0048] Compared with related technologies, the portable automatic testing device for digital in-vehicle intercoms provided by this utility model has the following advantages:

[0049] This utility model provides a portable automatic testing device for digital vehicle intercoms, which can quickly locate faults in vehicle intercoms such as armored vehicles and tanks inside the vehicle. It avoids the cumbersome process of traditional vehicle intercom testing equipment that requires numerous instruments and equipment and the need to disassemble the intercom to the outside of the vehicle for testing and repair. At the same time, it automatically generates the required reports and forms from the test values, meeting the requirements of rapid support for the military.

[0050] Specifically, the portable automatic testing device for digital in-vehicle intercoms can automatically turn the following modules on or off according to the instructions of the human-machine interface: (1) power module, (2) 2Hz oscillation module, (3) controllable relay module, (4) various interface modules, (5) audio and radio working mode switching interface, and (6) audio, radio, and passenger box channel switching interfaces, so as to automatically test the functions of passenger box 1 and passenger box 2, the audio interfaces of box 1 and box 2, and the performance of the radio interface of box 1. Its built-in sound card, acquisition card, and 2Hz oscillation module replace the audio signal source, millivoltmeter, and distortion tester required by traditional in-vehicle intercom testing equipment; the built-in power module replaces the regulated DC power supply required by traditional in-vehicle intercom testing equipment; and the controllable relay module replaces the dozens of audio cables required by traditional in-vehicle intercom testing equipment. These measures greatly save on the use of complex and diverse testing instruments and various testing cables. Portability saves testing space while miniaturizing the device, significantly reducing testing and maintenance costs and improving testing and maintenance efficiency.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A portable automatic test device for a digital intercom, characterized in that, The controller, the measurer and the power module are electrically connected; the controller comprises a central processing unit, a display, a mouse and a touchpad, and an interface adapter; the measurer comprises a sound card, a controllable relay module, a 2Hz oscillation module and an audio resistance voltage division network; the power module supplies power to the measured telephone, the interface adapter, the controllable relay module and the 2Hz oscillation module; the supply voltages are respectively 27V for the measured telephone, 5V for the interface adapter, and 12V for the controllable relay module and the 2Hz oscillation module; the 2Hz oscillation module generates a square wave signal with an interval of about 500ms by using an integrated circuit CD4060BE and a crystal 2048KHz.

2. A portable automatic test device for a digital intercom according to claim 1, characterized in that The power supply of the controller is AC220V, wherein the power supply of the self-made control mainboard is provided by the power module; the central processing unit is connected with the display, the touchpad through the internal interface of the industrial computer, connected with the mouse through the USB interface, and connected with the control mainboard in the industrial computer through the RS232 interface, the RS485 interface and the discrete interface; the control mainboard comprises the original mainboard of the industrial computer and the self-made control mainboard, and the self-made control mainboard is composed of a power filter circuit, a power protection circuit, various interface circuits and various interface protection circuits.

3. A portable automatic test device for a digital intercom according to claim 1, characterized in that, The power supply of the measurer is DC12V and DC5V; the first resistance voltage division network converts the 1kHz audio signal output by the sound card into a 7mV or 220mV continuous audio signal; the signal is modulated by the 2Hz oscillation module to generate an intermittent audio signal with an interval of about 500ms; the signal is output to the noise reduction module end of the measured passenger No.1 box through the controllable relay module and the interface adapter; the 7V continuous audio signal output by the passenger No.2 box is sent to the second resistance voltage division network through the controllable relay module, and the audio signal with high amplitude is attenuated; the audio signal with low amplitude after attenuation is sent to the sound card of the industrial computer, processed by the sound card test link, and finally the data is saved to the database by the central processing unit, so that the data can be found at any time when needed.

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