Power amplifier test system

Abstract

The utility model provides a power amplifier test system, which relates to the technical field of test, and comprises a host, power amplifier corollary equipment, an incubator and a load box, a test environment is provided for a power amplifier to be tested through the incubator, and the temperature and the humidity of the test environment are adjusted, so that the host adjusts the temperature and the humidity of the test environment through the incubator; therefore, the automation of the environment test of the to-be-tested power amplifier is realized, the test cost of the to-be-tested power amplifier is reduced, and the accuracy of the test result can be improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a power amplifier testing system. Background Technology

[0002] A power amplifier (or power amplifier) ​​primarily amplifies audio signals to drive speakers. It is a core component of an audio system, directly determining its playback quality. Therefore, reliability testing of power amplifiers is crucial.

[0003] In existing solutions, reliability testing for power amplifiers is still in the stage of manual inspection and functional testing. This not only increases the manpower cost of testing, but also introduces human error and reduces the accuracy of test results. Utility Model Content

[0004] This invention provides a power amplifier testing system to address the deficiencies in related technologies.

[0005] This utility model provides a power amplifier testing system, including: a main unit, power amplifier supporting equipment, a temperature chamber and a load box;

[0006] The host is connected to the power amplifier accessory and the temperature chamber respectively;

[0007] The power amplifier accessories are used to connect to the power amplifier under test.

[0008] The power amplifier under test is placed inside the temperature chamber, which provides a test environment for the power amplifier under test, adjusts the temperature and humidity of the test environment, and feeds back the temperature and humidity to the host.

[0009] The load cell is connected to the power amplifier under test;

[0010] The host is used to control the power amplifier accessories to wake up or put the power amplifier under test into sleep mode and to provide the power amplifier under test with an audio source signal. The host is also used to conduct environmental tests on the power amplifier under test.

[0011] The power amplifier testing system provided by this utility model further includes a first power supply and a second power supply;

[0012] The first power supply is connected to the host, the power amplifier accessory, and the temperature chamber, respectively.

[0013] The second power supply is connected to both the host and the power amplifier under test.

[0014] According to the present invention, a power amplifier testing system is provided, wherein the power amplifier supporting equipment includes a wake-up controller, and the wake-up controller is connected to the host and the power amplifier to be tested respectively.

[0015] The host is specifically used to control the wake-up controller to wake up or put the power amplifier under test into sleep mode.

[0016] According to the present invention, a power amplifier testing system is provided, wherein the audio source signal includes a digital signal, and the power amplifier under test includes a digital power amplifier;

[0017] The power amplifier accessories also include a signal generator, which is connected to the host and the power amplifier under test respectively.

[0018] The host is also specifically used to control the signal generator to generate the digital signal and transmit the digital signal to the digital power amplifier.

[0019] According to the present invention, a power amplifier testing system is provided, wherein the audio source signal includes an analog signal, and the power amplifier to be tested includes an analog power amplifier;

[0020] The power amplifier equipment also includes a sound source controller and a sound card integrated into the host computer. The sound source controller is connected to the power amplifier under test and the sound card, respectively.

[0021] The sound card is used to generate the analog signal;

[0022] The audio source controller is used to transmit the analog signal to the analog power amplifier.

[0023] According to the power amplifier testing system provided by this utility model, the audio source signal is an AC ripple signal, and the power supply voltage range of the second power supply includes 6V-28V;

[0024] The host computer is also used to perform electrical performance tests on the power amplifier under test.

[0025] The power amplifier testing system provided by this utility model further includes a relay system, wherein the relay system includes relays;

[0026] The relay is connected between the second power supply and the power amplifier under test;

[0027] The host is connected to the relay, and the host is used to control the on / off state of the relay.

[0028] According to the power amplifier testing system provided by this utility model, the host computer is further used to control the on / off state of the relay connected to the power amplifier under test, and to perform a static current test on the power amplifier under test; or...

[0029] The power amplifier under test includes multiple components, and the relays include multiple components, with each of the multiple power amplifiers under test connected to a corresponding relay.

[0030] The host is also used to control the power amplifier supporting equipment to go into sleep mode among the multiple power amplifiers under test, and to control the other relays in the relay system except for the target relay corresponding to the target amplifier to disconnect, so as to perform a static current test on the target amplifier.

[0031] According to the present invention, a power amplifier testing system further includes an interface box, wherein the relay system is configured inside the interface box;

[0032] The interface box is used to provide connection interfaces for the host, the power amplifier accessories, the temperature box, the load box, the first power supply and the second power supply.

[0033] The power amplifier testing system provided by this utility model also includes a current and voltage detection device;

[0034] The current and voltage detection device is connected to the host, the first power supply, the second power supply, and the power amplifier under test, respectively. It is used to detect the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of the power amplifier under test, and to send the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of the power amplifier under test to the host.

[0035] According to the power amplifier testing system provided by this utility model, the host has a built-in data acquisition card;

[0036] The acquisition card is used to acquire the audio signal output by the power amplifier under test.

[0037] According to the present invention, a power amplifier testing system is provided, wherein the power amplifier to be tested is a vehicle-mounted power amplifier.

[0038] The power amplifier testing system provided by this utility model includes a host, power amplifier accessories, a temperature chamber, and a load box. The temperature chamber provides a testing environment for the power amplifier under test and adjusts the temperature and humidity of the testing environment. The host can then adjust the temperature and humidity of the testing environment through the temperature chamber, thereby automating the environmental testing of the power amplifier under test, reducing the testing cost of the power amplifier under test, and improving the accuracy of the test results. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is one of the structural schematic diagrams of the power amplifier testing system provided by this utility model.

[0041] Figure 2 This is the second structural schematic diagram of the power amplifier testing system provided by this utility model.

[0042] Figure 3 This is the third schematic diagram of the power amplifier testing system provided by this utility model.

[0043] Figure 4 This is a schematic diagram of the control logic of the host in the power amplifier testing system provided by this utility model.

[0044] Figure 5 This is a functional diagram of the host computer system of the power amplifier testing system provided by this utility model. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] Because existing reliability testing methods for power amplifiers still rely on manual inspection and functional testing, this increases testing costs and reduces the accuracy of test results. Therefore, this invention provides a power amplifier testing system that is an automated testing system capable of performing automated reliability testing on power amplifiers.

[0047] Figure 1 This is a schematic diagram of the structure of a power amplifier testing system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the power amplifier test system includes: host 1, power amplifier accessories 2, temperature chamber 3, and load box 4;

[0048] The main unit 1 is connected to the power amplifier accessory 2 and the temperature chamber 3 respectively;

[0049] Power amplifier accessory 2 is used to connect to the power amplifier 5 under test;

[0050] The power amplifier 5 under test is placed inside the temperature chamber 3. The temperature chamber 3 is used to provide a test environment for the power amplifier 5 under test, adjust the temperature and humidity of the test environment, and feed back the temperature and humidity to the host 1.

[0051] Load bank 4 is connected to the power amplifier 5 under test;

[0052] The host 1 is used to control the power amplifier accessory 2 to wake up or put the power amplifier 5 under test into sleep mode and to provide the power amplifier 5 under test with an audio source signal. The host 1 is also used to conduct environmental tests on the power amplifier 5 under test.

[0053] Specifically, the host computer in the power amplifier test system can be an Industrial Personal Computer (IPC). The host computer can integrate a host computer system, which enables control of other devices and automated testing of the power amplifier under test. The host computer can also be configured with physical interfaces such as USB / RS232 / RS485 / GPIB, which allow connection to power amplifier accessories and temperature chambers for control.

[0054] Power amplifier accessories can be connected to the power amplifier under test (PAT) to wake up or put the PAT into sleep mode and provide it with an audio source signal. These accessories can include multiple independent devices, each performing different functions, or they can be an integrated device combining multiple functional modules.

[0055] The power amplifier accessories can send a wake-up command to the power amplifier under test to wake it up; the power amplifier accessories can also send a sleep command to the power amplifier under test to put it into sleep mode.

[0056] The power amplifier's accessories can also generate an audio source signal and transmit it to the power amplifier under test. This audio source signal can be a digital signal or an analog signal, depending on the type of power amplifier under test. If the power amplifier under test is a digital power amplifier, the audio signal will be a digital signal; if the power amplifier under test is an analog power amplifier, the audio signal will be an analog signal.

[0057] It is understood that the power amplifier under test (PAT) may include one or more. The power amplifier accessories can support waking up or putting each PAT into sleep mode, and providing audio source signals to each PAT. When there are multiple PATs, they can be of the same or different types. Furthermore, the power amplifier accessories can generate multiple audio source signals, which are transmitted to the corresponding PATs. These multiple audio source signals can be all digital signals, all analog signals, or a combination of both.

[0058] After receiving the audio source signal, the power amplifier under test amplifies the signal and outputs the amplified audio signal. The number of signal output terminals of the power amplifier under test can be configured as needed, such as 24, 36, 48, etc., without specific limitations here.

[0059] The power amplifier under test can be placed in a temperature chamber, which can provide an adjustable temperature and humidity testing environment for the power amplifier under test. The temperature and humidity of the testing environment can be adjusted and fed back to the host, which receives the temperature and humidity.

[0060] The chamber can be equipped with a temperature and humidity sensor, or both a temperature sensor and a humidity sensor, to detect temperature and humidity.

[0061] The main unit can also be equipped with a start button, which is used to start the power amplifier test system with one click. When the user presses the start button, the power amplifier test system can be started, and the host computer system in the main unit can then perform environmental testing on the power amplifier under test, that is, perform reliability testing on the power amplifier under test.

[0062] Environmental testing can determine whether a power amplifier under test can function properly at a specific temperature and humidity level, i.e., whether it can output audio signals correctly and whether the audio signals are normal. The host computer can store audio signal thresholds, and by comparing the audio signal with the audio signal thresholds, it can determine whether the audio signal is normal. The host computer can adjust the temperature and humidity of the test environment inside the chamber to determine whether the power amplifier under test can function properly at a specific temperature and humidity level, thus achieving environmental verification.

[0063] If the power amplifier under test fails to function properly under certain temperature and humidity conditions, the host computer can record the abnormal information and send it to the client terminal. Here, the client terminal communicates with the host computer, and the abnormal information includes the current temperature and humidity, as well as information related to the audio signal output by the power amplifier under test.

[0064] The power amplifier test system also includes load boxes, which are connected to the power amplifier under test (DUT) to ensure stable operation within the test chamber. It is understood that multiple load boxes can be included, with each DUT corresponding to one load box. Each load box can contain multiple loads of different resistance values, and these loads can be connected one-to-one with the signal output terminals of the corresponding DUT. The resistance values ​​of the loads within the load box can include 2Ω, 4Ω, 8Ω, etc.

[0065] The power amplifier testing system provided in this embodiment includes a host, power amplifier accessories, a temperature chamber, and a load chamber. The temperature chamber provides a testing environment for the power amplifier under test and adjusts the temperature and humidity of the testing environment. The host adjusts the temperature and humidity of the testing environment through the temperature chamber, thereby automating the environmental testing of the power amplifier under test, reducing the testing cost of the power amplifier under test, and improving the accuracy of the test results.

[0066] Based on the above embodiments, such as Figure 2 As shown, the power amplifier test system also includes a first power supply 6 and a second power supply 7.

[0067] The first power supply 6 is connected to the host 1, the power amplifier accessory 2 and the temperature chamber 3 respectively;

[0068] The second power supply 7 is connected to the host 1 and the power amplifier 5 under test, respectively.

[0069] Specifically, the host 1 can control the on / off state of the first power supply 6 and the second power supply 7.

[0070] When the host 1 controls the first power supply 6 to turn on, the first power supply 6 can supply power to the entire power amplifier test system, such as power amplifier accessories 2 and temperature chamber 3.

[0071] When the host 1 controls the second power supply 7 to be turned on, the second power supply 7 can be dedicated to powering the power amplifier 5 under test. In this way, the entire power amplifier test system and the power supply circuit of the power amplifier under test can be independently controlled, which is convenient for electrical performance testing and static current testing of the power amplifier under test.

[0072] Based on the above embodiments, the power amplifier supporting equipment includes a wake-up controller, which is connected to the host and the power amplifier under test respectively;

[0073] The host is specifically used to control the wake-up controller to wake up or put the power amplifier under test into sleep mode.

[0074] Specifically, the wake-up controller can be a Controller Area Network (CAN) controller. CAN is a serial data communication bus. The microcontroller (MCU) of the power amplifier under test can have a built-in CAN transceiver. With both the first and second power supplies on, the host can control the CAN controller to send response CAN commands to the power amplifier under test. Upon receiving the CAN command, the CAN transceiver wakes up or puts the power amplifier under test into sleep mode. By setting a wake-up controller in the power amplifier's accessories, the wake-up or sleep control of the power amplifier under test can be tested. When the wake-up controller is a CAN controller, the functionality of the CAN transceiver in the microcontroller of the power amplifier under test can also be tested.

[0075] Based on the above embodiments, the audio source signal includes a digital signal, and the power amplifier under test includes a digital power amplifier;

[0076] The power amplifier accessories also include a signal generator, which is connected to both the main unit and the power amplifier under test.

[0077] The main unit is also specifically used to control the signal generator to produce digital signals and transmit the digital signals to the digital power amplifier.

[0078] Specifically, the signal generator can be an arbitrary waveform signal generator, such as a digital signal that can generate a sine wave. With both the first and second power supplies on, the host computer wakes up the digital power amplifier via the wake-up controller. It can then control the signal generator to generate a digital signal and transmit it to the digital power amplifier. The digital power amplifier receives the digital signal, amplifies it, and outputs an audio signal. This process enables automated testing of the digital power amplifier.

[0079] Based on the above embodiments, the audio source signal includes an analog signal, and the power amplifier under test includes an analog power amplifier;

[0080] The power amplifier accessories also include a source controller and a sound card integrated into the host. The source controller is connected to the power amplifier under test and the sound card, respectively.

[0081] Sound cards are used to generate analog signals;

[0082] The audio source controller is used to transmit analog signals to the analog power amplifier.

[0083] Specifically, the host computer can generate an analog signal as an audio source signal through a sound card integrated within it. Then, with both the first and second power supplies on, the host computer wakes up the analog power amplifier via a wake-up controller. The analog power amplifier then transmits the analog signal to the amplifier through the audio source controller. Upon receiving the analog signal, the amplifier amplifies it and outputs an audio signal. This process enables automated testing of the analog power amplifier. Here, the audio source controller can be a device with the function of transmitting analog signals to the analog power amplifier, such as an A2B controller.

[0084] Based on the above embodiments, the audio source signal is an AC ripple signal, and the power supply voltage range of the second power supply includes 6V-28V;

[0085] The main unit is also used to perform electrical performance tests on the power amplifier under test.

[0086] Specifically, when the power amplifier under test is working normally, an AC ripple signal can be applied to the power amplifier under test as an audio source signal through a signal generator, and a 6V-28V DC voltage can be provided to the power amplifier under test through a second power supply to realize electrical performance tests such as overvoltage, reverse voltage, and superimposed AC. The host can be started and the status monitored with one click.

[0087] Based on the above embodiments, the power amplifier test system also includes a relay system, which includes relays;

[0088] The relay is connected between the second power supply and the power amplifier under test;

[0089] The host is connected to the relay, and the host is used to control the on / off state of the relay.

[0090] Specifically, the number of relays in the relay system can be determined based on the number of power amplifiers under test, so that each power amplifier under test is connected to a relay, thereby controlling the connection status between the power amplifier under test and the second power supply.

[0091] Each relay in the relay system is connected to the host, and the host controls the on / off state of each relay to control the connection state between the power amplifier under test and the second power supply.

[0092] In this embodiment of the invention, by introducing a relay system, conditions can be provided for performing static current tests on the power amplifier under test.

[0093] Based on the above embodiments, the host is also used to control the on / off state of the relay connected to the power amplifier under test, and to perform a static current test on the power amplifier under test.

[0094] or,

[0095] The power amplifier under test includes multiple components, and the relays also include multiple components. The multiple power amplifiers under test are connected to the multiple relays in a one-to-one correspondence.

[0096] The host is also used to control the power amplifier accessories to put the target amplifier among multiple power amplifiers under test into sleep mode, and to control the other relays in the relay system to disconnect except for the target relay corresponding to the target amplifier, so as to perform static current test on the target amplifier.

[0097] Specifically, the power amplifier under test may include one or more. In this case, the host can control the on / off state of the relays connected to each power amplifier under test to perform a static current test on each power amplifier under test. The static current test process is as follows: the host controls the relays to first disconnect and then connect, and detects the power amplifier under test's power-on non-operating current, i.e., the static current, when the power amplifier under test is not working, thus completing the static current test.

[0098] When there are multiple power amplifiers under test, there are also multiple relays, with each power amplifier under test connected to a corresponding relay. In this case, the host can control the power amplifier's accessories to put the target amplifier among the multiple power amplifiers under test into sleep mode, and control the relay system to disconnect all relays except the target relay corresponding to the target amplifier. Afterwards, the power amplifier's accessories are controlled to wake up the target amplifier, and the target amplifier's power-on non-operating current (quiescent current) is detected when the target amplifier is not working, thus completing the quiescent current test.

[0099] Here, the target amplifier can be any one of multiple power amplifiers under test, thus enabling static current testing of each power amplifier under test.

[0100] During static current testing, static current can be detected using a current detection device. This current detection device refers to a device with current detection function, such as an ammeter, multimeter, etc., without specific limitations here.

[0101] Based on the above embodiments, the power amplifier test system also includes an interface box, and the relay system is configured inside the interface box;

[0102] The interface box provides connection interfaces for the host, power amplifier accessories, temperature box, load box, first power supply and second power supply.

[0103] Specifically, such as Figure 3 As shown, the power amplifier test system also includes an interface box 8. The relay system 81 can be configured inside the interface box 8. The interface box 8 can be configured with multiple connection interfaces, which may include physical interfaces such as USB / RS232 / RS485 / GPIB.

[0104] All devices in the power amplifier test system can be interconnected through the connection interfaces on the interface box. This avoids the complicated wiring caused by direct connection of devices in the power amplifier test system, and also allows the location of the abnormality to be determined by detecting parameters such as voltage and current at the connection interfaces when an abnormality occurs.

[0105] like Figure 3 As shown, the main unit 1 and the power amplifier accessories 2 include a wake-up controller 21, a signal generator 22, an audio source controller 23, a temperature chamber 3, a load box 4, a power amplifier under test 5, a first power supply 6, and a second power supply 7, all of which are connected to the interface box 8.

[0106] Based on the above embodiments, the power amplifier testing system further includes a current and voltage detection device; the current and voltage detection device is connected to the host, the first power supply, and the second power supply respectively;

[0107] The current and voltage detection device is connected to the host, the first power supply, the second power supply and the power amplifier under test respectively. It is used to detect the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply and the signal output voltage and / or signal output current of the power amplifier under test, and send the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply and the signal output voltage and / or signal output current of the power amplifier under test to the host.

[0108] Specifically, current and voltage detection devices can be devices with current and voltage detection functions. They can include independent current and voltage detection devices, such as ammeters and voltmeters, or single devices that integrate current and voltage detection functions, such as multimeters.

[0109] The current and voltage detection device can be connected to the host, a first power supply, a second power supply, and the power amplifier under test, respectively. After the power amplifier under test is operating stably, the host can control the current and voltage detection device to detect the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of the power amplifier under test. Alternatively, the current and voltage detection device can operate independently of the host and only feed data back to the host.

[0110] The current and voltage detection device can also detect the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and send the voltage and / or current of the signal output terminal of the power amplifier under test to the host.

[0111] The host computer can, after receiving the operating voltage and / or current of the first power supply and the second power supply, determine whether the operating voltage and / or current of the first power supply and the second power supply are normal. Here, the host computer can store operating voltage and / or current thresholds for the first power supply, operating voltage and / or current thresholds for the second power supply, and signal output voltage and / or current thresholds for the power amplifier under test. By comparing the operating voltage and / or current of the first power supply with its corresponding thresholds, the host computer can determine whether the operating voltage and / or current of the first power supply is abnormal. Similarly, by comparing the operating voltage and / or current of the second power supply with its corresponding thresholds, the host computer can determine whether the operating voltage and / or current of the signal output terminal is abnormal. Finally, by comparing the voltage and / or current of the signal output terminal with its corresponding thresholds, the host computer can determine whether the voltage and / or current of the signal output terminal is abnormal.

[0112] If the operating voltage and / or operating current of the first power supply becomes abnormal, the host can record the abnormal information and send it to the client terminal. Here, the abnormal information includes the abnormal voltage and / or abnormal current of the first power supply at that moment.

[0113] If the operating voltage and / or operating current of the second power supply becomes abnormal, the host can record the abnormal information and send it to the client terminal. Here, the abnormal information includes the abnormal voltage and / or abnormal current of the second power supply at that moment.

[0114] If the voltage and / or current at the signal output terminal are abnormal, the host can record the abnormal information and send it to the client terminal. Here, the abnormal information includes the abnormal voltage and / or abnormal current at the signal output terminal at that moment.

[0115] like Figure 4 As shown, in the power amplifier testing system, the host computer system controls the sound card, wake-up controller, signal generator, audio source controller, temperature chamber, first power supply, and second power supply. The power amplifier under test can be placed inside the temperature chamber. It is understandable that... Figure 4 The host computer system is not shown.

[0116] The power amplifier under test can include 6. If each power amplifier under test has 24 signal output terminals, then the 6 power amplifiers under test have a total of 144 signal output terminals, realizing the output of 144 audio signals. The sound card can realize the acquisition of 144 audio signals.

[0117] The current and voltage detection equipment detects the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of each power amplifier under test, and feeds them back to the host.

[0118] The temperature and humidity chamber can provide feedback to the host computer regarding the test environment temperature and humidity of each power amplifier under test. The wake-up controller can send wake-up or sleep commands to each power amplifier under test. The signal generator can send digital signals to the digital power amplifiers in each power amplifier under test, and the sound card can generate analog signals and transmit them to the analog power amplifiers via the audio source controller.

[0119] Based on the above embodiments, the host has a built-in acquisition card;

[0120] The acquisition card is used to acquire the audio signal output by the power amplifier under test.

[0121] Specifically, the audio signal output by the power amplifier under test can be actively acquired through the built-in acquisition card of the host computer. The acquisition card can also receive the audio signal output by the power amplifier under test.

[0122] The host can also display the waveform of the audio signal to the user.

[0123] Based on the above embodiments, the power amplifier under test is an on-board power amplifier. Through this power amplifier testing system, static current tests, electrical performance tests, environmental tests, and other tests can be performed on the on-board power amplifier.

[0124] like Figure 5 As shown, the host computer system integrated within the host provided in this embodiment of the present invention can perform the following functions: audio signal threshold setting, temperature chamber operation program setting, power control program, CAN control program, A2B control program, relay system control program, fault acquisition and reporting, audio signal waveform display, test report generation, static current curve display, electrical performance test curve display, equipment operation status display, and equipment usage progress status display.

[0125] The generated test report can include test process data, test results, and graphs. It also displays information such as test time, test details, voltage, current, temperature and humidity, test results, and test status.

[0126] In summary, the power amplifier testing system provided in this embodiment is applicable not only to the automated testing of vehicle-mounted power amplifiers but also to the automated testing of other types of power amplifiers. By integrating hardware devices such as a temperature chamber, acquisition card, programmable power supply, audio controller, wake-up controller, signal generator, and multimeter, along with conventional software logic, the system enables one-click control of power supplies, temperature chambers, signal generators, sound cards, and other devices during environmental testing of multiple power amplifiers under test. It also allows for parameter configuration of the power amplifiers under test, acquisition and monitoring of multiple audio signals, and fault reporting, thus overcoming the incompleteness and reduced fault tolerance of manual testing. Furthermore, it can simulate actual audio input and output and required loads, as well as actual usage environmental conditions. By simulating environmental stress, it accelerates the aging of the power amplifiers under test and monitors audio, voltage, current, and output status in real time. This allows for the estimation of the lifespan of the power amplifiers under test and the early detection of design defects.

[0127] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0128] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power amplifier test system, characterized by, include: Main unit, power amplifier accessories, temperature chamber and load box; The host is connected to the power amplifier accessory and the temperature chamber respectively; The power amplifier accessories are used to connect to the power amplifier under test. The power amplifier under test is placed inside the temperature chamber, which provides a test environment for the power amplifier under test, adjusts the temperature and humidity of the test environment, and feeds back the temperature and humidity to the host. The load cell is connected to the power amplifier under test; The host is used to control the power amplifier accessories to wake up or put the power amplifier under test into sleep mode and to provide the power amplifier under test with an audio source signal. The host is also used to conduct environmental tests on the power amplifier under test.

2. The power amplifier test system of claim 1, wherein, It also includes a first power supply and a second power supply; The first power supply is connected to the host, the power amplifier accessory, and the temperature chamber, respectively. The second power supply is connected to both the host and the power amplifier under test.

3. The power amplifier test system of claim 2, wherein, The power amplifier accessory includes a wake-up controller, which is connected to both the host and the power amplifier under test. The host is specifically used to control the wake-up controller to wake up or put the power amplifier under test into sleep mode.

4. The power amplifier test system of claim 2, wherein, The audio source signal includes a digital signal, and the power amplifier under test includes a digital power amplifier; The power amplifier accessories also include a signal generator, which is connected to the host and the power amplifier under test respectively. The host is also specifically used to control the signal generator to generate the digital signal and transmit the digital signal to the digital power amplifier.

5. The power amplifier test system of claim 2, wherein, The audio source signal includes an analog signal, and the power amplifier under test includes an analog power amplifier. The power amplifier equipment also includes a sound source controller and a sound card integrated into the host computer. The sound source controller is connected to the power amplifier under test and the sound card, respectively. The sound card is used to generate the analog signal; The audio source controller is used to transmit the analog signal to the analog power amplifier.

6. The power amplifier test system of claim 2, wherein, The audio source signal is an AC ripple signal, and the power supply voltage range of the second power supply includes 6V-28V; The host computer is also used to perform electrical performance tests on the power amplifier under test.

7. The power amplifier test system of claim 2, wherein, It also includes a relay system, which includes relays; The relay is connected between the second power supply and the power amplifier under test; The host is connected to the relay, and the host is used to control the on / off state of the relay.

8. The power amplifier test system of claim 7, wherein, The host computer is also used to control the on / off state of the relays connected to the power amplifier under test, and to perform a static current test on the power amplifier under test; or, The power amplifier under test includes multiple components, and the relays include multiple components, with each of the multiple power amplifiers under test connected to a corresponding relay. The host is also used to control the power amplifier supporting equipment to go into sleep mode among the multiple power amplifiers under test, and to control the other relays in the relay system except for the target relay corresponding to the target amplifier to disconnect, so as to perform a static current test on the target amplifier.

9. The power amplifier test system of claim 7, wherein, It also includes an interface box, in which the relay system is configured; The interface box is used to provide connection interfaces for the host, the power amplifier accessories, the temperature box, the load box, the first power supply and the second power supply.

10. The power amplifier test system of claim 2, wherein, It also includes current and voltage detection equipment; The current and voltage detection device is connected to the host, the first power supply, the second power supply, and the power amplifier under test, respectively. It is used to detect the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of the power amplifier under test, and to send the operating voltage and / or operating current of the first power supply, the operating voltage and / or operating current of the second power supply, and the signal output voltage and / or signal output current of the power amplifier under test to the host.

11. The power amplifier test system of any of claims 1-10, wherein, The host computer has a built-in data acquisition card; The acquisition card is used to acquire the audio signal output by the power amplifier under test.

12. The power amplifier test system of any of claims 1-10, wherein, The power amplifier under test is an in-vehicle power amplifier.

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