Automobile intelligent cabin audio power amplifier testing device and system

Abstract

The utility model discloses an automobile intelligent cabin audio power amplifier test device and system, and is characterized in that the automobile intelligent cabin audio power amplifier test device comprises a radiator pedestal, a load channel, a main control board, a fan, and a temperature sensor; wherein the load channels, the main control board and the fan are mounted on the surface of the radiator base, and each load channel comprises a plurality of load resistors; the temperature sensor is connected with the main control board, and the main control board is used for controlling the fan to be started under the condition that the temperature is higher than a preset threshold value. According to the utility model, a loudspeaker load is replaced by the load resistor in the load channel, and the main control board and the load channel are arranged in the same testing device, so that the mutual interference of the testing wire harnesses is reduced, the testing environment of the automobile power amplifier test is simplified, and the efficiency of the automobile power amplifier test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile power amplifier testing, in particular to an automobile intelligent cockpit audio power amplifier testing device and system. Background Art

[0002] As the automotive industry is transforming from the era of traditional fuel vehicles to the era of smart vehicles, the related automotive cockpit industry is entering the era of smart cockpits. As an important function of smart cockpits, the in-car audio experience is becoming a highlight that is being redefined by various brands. In the test of in-car audio, the power amplifier is tested by building a complete A2B topology system, which includes new peripherals such as power supply and digital MIC.

[0003] However, in the current use of the A2B topology system for car amplifier testing, the complete A2B topology system contains many peripheral devices, and the test harnesses of each peripheral device interfere with each other. In addition, it is difficult to set up a test environment for car amplifier testing, resulting in low efficiency of car amplifier testing. Summary of the invention

[0004] A technical problem to be solved by the embodiments of the utility model is to improve the efficiency of automobile power amplifier testing.

[0005] In a first aspect, the present application provides a vehicle intelligent cockpit audio amplifier testing device.

[0006] The automotive intelligent cockpit audio amplifier test device comprises: a radiator base, a load channel, a main control board, a fan and a temperature sensor; wherein:

[0007] The load channel, the main control board and the fan are installed on the surface of the radiator base, and each load channel includes a plurality of load resistors;

[0008] The temperature sensor is connected to the main control board, and the main control board is used to control the fan to start when the temperature is higher than a preset threshold.

[0009] In one embodiment,

[0010] The automobile intelligent cockpit audio power amplifier test device also includes:

[0011] A2B interface, one end of the A2B interface is connected to the main control board, and the other end is connected to the power amplifier to be tested.

[0012] In one embodiment, the main control board includes an A2B module and a micro control unit.

[0013] In one of the embodiments, the A2B interface is connected to an A2B configuration board, and the A2B configuration board configures the test logic of the A2B module through a terminal.

[0014] In one embodiment, the load resistors in each of the load channels are connected in series.

[0015] In one of the embodiments, the automobile intelligent cockpit audio amplifier testing device includes four load channels.

[0016] In one embodiment, the load channel includes a switch module corresponding to each load resistor, and the total load is adjusted by the switch module.

[0017] In one of the embodiments, the heat sink base is disposed in the middle of the fan, and the wind direction of the fan is directed toward the load resistor and the main control board.

[0018] In one of the embodiments, thermal conductive glue is included between the load resistor and the heat sink base, and is fastened to the surface of the heat sink base by screws.

[0019] In a second aspect, the present application also provides a car smart cockpit audio amplifier testing system, the system comprising the car smart cockpit audio amplifier testing device described in the first aspect and an amplifier to be tested.

[0020] The above-mentioned automobile intelligent cockpit audio amplifier test device and system include: a radiator base, a load channel, a main control board, a fan and a temperature sensor; wherein: the load channel, the main control board and the fan are installed on the surface of the radiator base, and each load channel includes multiple load resistors; the temperature sensor is connected to the main control board, and the main control board is used to control the fan to start when the temperature is higher than a preset threshold. By adopting this device, the load resistor in the load channel replaces the speaker load, and the main control board and the load channel are set in the same test device, which reduces the mutual interference of the test harness, simplifies the test environment of the automobile amplifier test, and improves the efficiency of the automobile amplifier test.

[0021] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] The present invention can be more clearly understood from the following detailed description with reference to the accompanying drawings, wherein:

[0024] Figure 1This is an application environment diagram of a car intelligent cockpit audio amplifier test system in one embodiment;

[0025] Figure 2 Schematic diagram of the structure of a vehicle intelligent cockpit audio amplifier test device in one embodiment;

[0026] Figure 3 It is a structural schematic diagram of the configuration of an automobile intelligent cockpit audio amplifier testing device in an embodiment. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] The present invention provides a vehicle intelligent cockpit audio power amplifier test device 120, which can be used for example Figure 1 The automobile intelligent cockpit audio power amplifier test system 100 is shown. In the automobile intelligent cockpit audio power amplifier test system 100, it includes: an amplifier to be tested 110 and an automobile intelligent cockpit audio power amplifier test device 120. Among them, the automobile intelligent cockpit audio power amplifier test device 120 is connected to the power amplifier to be tested 110 for controlling and monitoring the power amplifier to be tested 110 to test the power amplifier to be tested 110.

[0033] Optionally, the power amplifier 110 to be tested refers to an audio power amplifier device that needs to be tested and evaluated, for example, a car smart cockpit audio power amplifier. The car smart cockpit audio power amplifier is a power amplifier device installed inside the car cockpit, which is used to amplify audio signals and drive speakers to realize the audio output function of the audio system. It is usually composed of a digital signal processor (DSP, Digital Signal Processing / Processor), a power amplifier and an output interface. The embodiment of the utility model does not limit the type and number of hardware devices that can be integrated in the car smart cockpit audio power amplifier test device 120. Specifically, the internal connection structure and achievable application functions of the car smart cockpit audio power amplifier test device 120 are described in detail in the subsequent embodiments of the utility model.

[0034] In one embodiment, Figure 2 As shown, a vehicle intelligent cockpit audio power amplifier test device is provided, and the vehicle intelligent cockpit audio power amplifier test device is applied to Figure 1 In the automobile intelligent cockpit audio amplifier test system, the automobile intelligent cockpit audio amplifier test device 120 includes: a radiator base 121, a load channel 122, a main control board 123, a fan 124 and a temperature sensor 125, wherein the load channel 122, the main control board 123 and the fan 124 are installed on the surface of the radiator base 121, and each load channel 122 includes a plurality of load resistors 126;

[0035] The temperature sensor 125 is connected to the main control board 123 , and the main control board 123 is used to control the fan 124 to start when the temperature is higher than a preset threshold.

[0036] In practice, the radiator base 121 is a component used to support the automotive intelligent cockpit audio amplifier test device and provide heat dissipation function. The radiator base 121 is a base structure made of metal, including a large heat dissipation area and good heat dissipation performance. The surface of the radiator base 121 can be made of metal materials such as aluminum alloy or copper. The metal material has good thermal conductivity and helps to conduct the heat generated by the load resistor 126 in the load channel 122 to the outside. On the surface of the base, support positions for various components are provided, such as installation positions for the load channel, main control board, fan and other accessories. The support position includes appropriate dimensions and interfaces to facilitate the installation and fixing of various components to ensure the stability and reliability of the automotive intelligent cockpit audio amplifier test device.

[0037] There can be multiple load channels 122, each of which includes a load interface. The multiple load interfaces are used to simulate different load conditions of different audio devices. For example, the load channel 122 can be designed as a pluggable interface module, and each interface module includes multiple load resistors 126 or adjustable load elements to simulate the impedance of different speakers or sound boxes. Optionally, the load channel 122 includes a protection circuit to avoid damage to the power amplifier under test due to overload or short circuit during the test. In addition, the interface design of the load channel 122 should facilitate the operator to quickly change or set different load conditions for comprehensive and effective testing. Each load channel 122 can set different total load resistance values ​​according to the multiple load resistors 126. For example, each load channel 122 can provide commonly used loads such as 2Ω, 4Ω, 6Ω, 8Ω, 10Ω, etc. for testing.

[0038] The main control board 123 is connected to the temperature sensor 125 and the fan 124 in communication. The communication between the main control board 123 and the temperature sensor 125 is used to monitor the working temperature inside the automotive intelligent cockpit audio amplifier test device in real time, and to determine whether the fan 124 needs to be turned on to assist in heat dissipation by reading the data of the temperature sensor 125. The temperature sensor 125 is used to measure the temperature of the surrounding environment, convert the temperature into an electrical signal and transmit it to the main control board 123. When the temperature is higher than a preset threshold, the main control board 123 controls the fan 124 to start, and the fan 124 assists the radiator base 121 in removing heat by generating air flow.

[0039] The above-mentioned automobile intelligent cockpit audio amplifier test device and system include: a radiator base, a load channel, a main control board, a fan and a temperature sensor; wherein: the load channel, the main control board and the fan are installed on the surface of the radiator base, and each load channel includes multiple load resistors; the temperature sensor is connected to the main control board, and the main control board is used to control the fan to start when the temperature is higher than a preset threshold. By adopting this device, the load resistor in the load channel replaces the speaker load, and the main control board and the load channel are set in the same test device, which reduces the mutual interference of the test harness, simplifies the test environment of the automobile amplifier test, and improves the efficiency of the automobile amplifier test.

[0040] In one embodiment, Figure 2 As shown, the automotive intelligent cockpit audio amplifier test device also includes:

[0041] A2B interface 130 , one end of the A2B interface 130 is connected to the main control board 123 , and the other end is connected to the power amplifier 110 to be tested.

[0042] In practice, the A2B interface is a digital audio bus interface for automotive audio applications, which can achieve high-quality audio data transmission and control. In the automotive intelligent cockpit audio amplifier test device, the A2B interface 130 is used to connect the main control board 123 and the amplifier to be tested 110.

[0043] One end of the A2B interface 130 is connected to the main control board 123, and the main control board 123 sends audio data and control signals to the power amplifier 110 to be tested through the interface to drive the power amplifier to output according to the preset power. The main control board 123 can send audio signals to the power amplifier 110 to be tested through the A2B interface 130 to test the performance indicators of the power amplifier under different loads and audio input conditions, such as output power, distortion, etc. At the same time, the main control board 123 can also send control signals to the power amplifier 110 to be tested through the A2B interface 130 to adjust the working mode and parameters of the power amplifier.

[0044] The A2B interface 130 at the other end is connected to the power amplifier 110 to be tested, so that the main control board 123 can communicate with the power amplifier in a two-way manner. Through the A2B interface 130, the main control board 123 can receive audio data, status information and feedback signals sent back by the power amplifier 110 to monitor the working status of the power amplifier in real time and perform corresponding control.

[0045] In this embodiment, the design of the A2B interface 130 has the characteristics of high bandwidth, low latency and strong anti-interference ability to meet the high requirements for audio data transmission in the car audio system. By using the A2B interface 130 to connect the main control board 123 and the power amplifier 110 to be tested, the transmission and control of digital audio signals can be easily realized, and the test efficiency and accuracy can be improved.

[0046] In one embodiment, the main control board 123 includes an A2B module and a micro control unit.

[0047] In implementation, the main control board 123 is used for temperature monitoring, controlling the fan 124 and configuring the A2B module. The main control board 123 includes an A2B module and a micro-control unit, wherein the A2B module is used to store the configuration logic for the power amplifier to be tested. Through the A2B module, the user can configure the test logic of the power amplifier to be tested, including audio data transmission parameters, control signal settings, etc. At the same time, the A2B module is also responsible for communicating with the power amplifier to be tested, controlling the working state and parameters of the power amplifier, so as to realize the control of the power amplifier to be tested.

[0048] The microcontrol unit is used to monitor the system temperature and implement temperature control, and when it detects that the temperature exceeds a preset threshold, it controls the start and stop of the fan 124 and controls the operating power of the fan 124, that is, controls the air volume of the fan 124.

[0049] In this embodiment, the main control board 123 of the automobile intelligent cockpit audio amplifier test device is integrated with an A2B module and an A2B interface. The A2B module reduces the peripheral devices that drive the power amplifier, such as digital MIC, etc. When testing the power amplifier to be tested, it can be avoided by the equipment on the external A2B link, simplifying the test environment of the power amplifier test and improving the test efficiency of the automobile power amplifier test.

[0050] In one embodiment, Figure 3 As shown, the A2B interface 130 is connected to the A2B configuration board 140, and the A2B configuration board 140 configures the test logic of the A2B module through the terminal.

[0051] In implementation, the main control board 123 includes an A2B module, which is used to configure the test logic of the power amplifier to be tested. When the test logic of the A2B module needs to be configured, one end of the A2B configuration board 140 is connected to the main control board 123 through the A2B interface, and the other end of the A2B configuration board 140 is connected to the terminal, and the main control board 123 is configured through the terminal.

[0052] In a specific embodiment, first, the A2B configuration board 140 is connected to the terminal device through an appropriate interface (for example, USB, Ethernet, etc.) to ensure that the A2B configuration board 140 can communicate with the terminal. A communication connection is established with the A2B module in the main control board 123 through the A2B configuration tool software in the terminal, and the user sets the test logic and parameters of the power amplifier to be tested in the A2B configuration tool software. This may involve settings in terms of audio sampling rate, channel configuration, clock synchronization mode, etc. After the test logic configuration is completed, the configured parameters and logic are sent to the A2B module of the main control board 123 through the A2B configuration tool software to complete the configuration of the test logic in the A2B module.

[0053] In one embodiment, the load resistors 126 in each load channel 122 are connected in series.

[0054] In implementation, the load resistors 126 in each load channel 122 are connected in series, that is, one port of the load resistor 126 is connected to the positive electrode of the previous load resistor 126, and the other port is connected to the negative electrode of the next load resistor 126, and so on. The load resistors 126 connected in series play a role of voltage division in the circuit. When the input signal passes through each load resistor 126, a corresponding voltage drop will be generated according to the size of the resistance value. Through the load resistors 126 connected in series, the input signal can be distributed to different load channels 122 to achieve signal distribution and adjustment.

[0055] In addition, the series-connected load resistor 126 can also be used for applications such as matching circuit impedance, adjusting circuit gain, and achieving voltage distribution.

[0056] In this embodiment, a load resistor is used instead of a speaker, which can protect human ears from being harmed by noise during long-term testing.

[0057] In one embodiment, the automobile intelligent cockpit audio power amplifier testing device includes four load channels 122 .

[0058] In implementation, the four load channels 122 included in the automotive intelligent cockpit audio amplifier test device can test the performance of four amplifier audio channels at the same time. For example, by testing multiple channels at the same time, the consistency between these channels can be compared and evaluated. Consistency refers to whether the performance of each channel in terms of output power, frequency response, distortion, etc. is consistent. Through testing, the consistency level between the channels can be determined to help eliminate the adverse effects of channel differences on the audio experience. Testing the performance of the four channels can also help adjust and calibrate the output power and frequency response of each channel to achieve the desired sound balance and ideal effect. In the car cockpit, different audio channels may be connected to different speaker positions or frequency bands. By testing the performance of each channel at the same time, the parameters of the amplifier can be adjusted in real time to ensure the balance and clarity of the car cockpit audio system. Testing four channels at the same time can also help detect faults and problems. If a channel is abnormal, the fault can be located faster by comparing it with other channels. This helps to improve the efficiency of troubleshooting and reduce maintenance time. By testing the performance of four channels at the same time, the normal operation of the automotive intelligent cockpit audio amplifier under various load conditions can be ensured. This helps verify the output quality and stability of the audio amplifier and ensures that it meets the design and specification requirements. Through testing and verification, the quality and reliability of the car cabin audio system can be guaranteed.

[0059] In one embodiment, the load channel 122 includes a switch module corresponding to each load resistor 126 , and the total load is adjusted by the switch module.

[0060] In implementation, through the switches corresponding to the load resistors 126, the total load can be dynamically adjusted when the load resistors 126 are connected in series, for example, Figure 2 As shown, the load resistors 126 of each load channel 122 are 2Ω, 4Ω and 4Ω respectively. By opening a 2Ω load resistor 126 and closing other 4Ω load resistors 126, a total load of 2Ω can be achieved. According to the same principle, each load channel 122 can provide commonly used total loads such as 2Ω, 4Ω, 6Ω, 8Ω, 10Ω for testing.

[0061] In this embodiment, load resistors of different structures are combined with switches to form a variety of electronic loads for testing.

[0062] In one embodiment, Figure 2 As shown, the radiator base 121 is disposed in the middle of the fan 124 , and the wind direction of the fan 124 points to the load resistor 126 and the main control board 123 .

[0063] In practice, the radiator base 121 is arranged in the middle of the fan 124, so that the upper and lower surfaces of the radiator base 121 can be cooled simultaneously, and the load resistor 126 can be directly cooled. The forced air convection provided by the fan 124 can accelerate the heat transfer and heat dissipation on the radiator, thereby helping to reduce the operating temperature of the load resistor 126 and the main control board 123.

[0064] In one embodiment, a thermal conductive adhesive is included between the load resistor 126 and the heat sink base 121 , and the load resistor 126 is fastened to the surface of the heat sink base 121 by screws.

[0065] In implementation, the thermally conductive adhesive can increase the contact area between the load resistor 126 and the radiator base 121 and improve the efficiency of heat transfer. The thermally conductive adhesive has good thermal conductivity and can quickly transfer the heat generated by the load resistor 126 to the radiator base 121, making it easier to be absorbed and dissipated by the radiator base 121. At the same time, the thermally conductive adhesive can also provide a certain degree of buffering between the load resistor 126 and the radiator base 121 to reduce the impact of instantaneous impact on the load resistor 126 and the radiator base 121. This helps to reduce the thermal stress and thermal expansion caused by instantaneous temperature changes, thereby improving the stability and reliability of the system. By fixing the load resistor 126 on the radiator base 121 with screws, the load resistor 126 can be prevented from loosening due to vibration during operation. The tightening of the screws can ensure that the load resistor 126 always maintains good contact with the radiator base 121, ensuring effective heat transfer.

[0066] Based on the same inventive concept, as mentioned above Figure 1 As shown, the embodiment of the utility model also provides a car intelligent cockpit audio amplifier test 100. The implementation scheme for solving the problem provided by the car intelligent cockpit audio amplifier test system 100 is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more car intelligent cockpit audio amplifier test system embodiments provided below can refer to the above limitations on the car intelligent cockpit audio amplifier test device 120, which will not be repeated here.

[0067] In one embodiment, a vehicle smart cockpit audio power amplifier testing system 100 is provided. The system 100 includes a vehicle smart cockpit audio power amplifier testing device 120 and an amplifier to be tested 110 .

[0068] In an embodiment of the utility model, the automobile intelligent cockpit audio amplifier test device 120 is connected to the amplifier to be tested 110 through appropriate wiring. According to the test requirements, the input and output interfaces of the amplifier are connected to input and output the test signal. The automobile intelligent cockpit audio amplifier test 120 is used to generate an appropriate test signal, such as a sine wave or an audio signal within a frequency range. Through the connecting line, the test signal is input into the amplifier to be tested 110, and the signal output by the amplifier to be tested 110 is monitored to complete the test of the automobile intelligent cockpit audio amplifier (automobile intelligent cockpit audio amplifier).

[0069] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0070] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. A car intelligent cockpit audio amplifier test device, characterized in that: The automotive intelligent cockpit audio amplifier test device comprises: a radiator base, a load channel, a main control board, a fan and a temperature sensor; wherein: The load channel, the main control board and the fan are installed on the surface of the radiator base, and each load channel includes a plurality of load resistors; The temperature sensor is connected to the main control board, and the main control board is used to control the fan to start when the temperature is higher than a preset threshold.

2. The device according to claim 1, characterized in that The automobile intelligent cockpit audio power amplifier test device also includes: A2B interface, one end of the A2B interface is connected to the main control board, and the other end is connected to the power amplifier to be tested.

3. The device according to claim 1, characterized in that The main control board includes an A2B module and a micro-control unit.

4. The device according to claim 2, characterized in that The A2B interface is connected to an A2B configuration board, and the A2B configuration board configures the test logic of the A2B module through a terminal.

5. The device according to claim 4, characterized in that The load resistors in each of the load channels are connected in series.

6. The device according to claim 1, characterized in that The automobile intelligent cockpit audio power amplifier testing device includes four load channels.

7. The device according to claim 1, characterized in that The load channel includes a switch module corresponding to each load resistor, and the total load is adjusted by the switch module.

8. The device according to claim 1, characterized in that The radiator base is arranged in the middle of the fan, and the wind direction of the fan points to the load resistor and the main control board.

9. The device according to claim 1, characterized in that A heat-conducting glue is included between the load resistor and the radiator base, and is fastened to the surface of the radiator base by screws.

10. An automotive intelligent cockpit audio amplifier test system, characterized in that: The system comprises the automobile intelligent cockpit audio power amplifier testing device according to any one of claims 1 to 9 and an amplifier to be tested.

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