CN218570473U - Testing device - Google Patents
Testing device Download PDFInfo
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- CN218570473U CN218570473U CN202222501597.0U CN202222501597U CN218570473U CN 218570473 U CN218570473 U CN 218570473U CN 202222501597 U CN202222501597 U CN 202222501597U CN 218570473 U CN218570473 U CN 218570473U
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Abstract
The embodiment of the utility model discloses testing arrangement. The testing device comprises an audio signal transmission unit, a simulation load, a relay and an audio signal processing circuit. The audio signal transmission unit is connected to the plurality of speakers and used for transmitting original audio signals from an audio signal source to the speakers through corresponding audio signal transmission channels respectively, the analog load is used for extracting audio signals to be tested of the connected audio signal transmission channels, the relay is arranged between the analog load and each audio signal transmission channel and used for selectively connecting the analog load with a target audio signal transmission channel, and the audio signal processing circuit is connected with the analog load and used for converting the original audio signals and the audio signals to be tested into corresponding digital signals to perform comparison testing. By the test device, the test efficiency of a multi-loudspeaker audio channel scene can be improved, and the test cost is reduced.
Description
Technical Field
The utility model relates to a test field, concretely relates to testing arrangement.
Background
With the development of vehicle intelligence, the types of systems mounted on a vehicle are increasingly complex, but most of the systems usually have at least one independent speaker, so that the number of speakers mounted on the vehicle is increased.
In order to test the transmission quality of audio channels of a plurality of loudspeakers arranged on a vehicle, the prior art generally uses a plurality of audio test instruments to build a test environment, and then uses a high-performance host to control each audio test instrument to realize the test work of each loudspeaker audio channel, but the test efficiency of the prior test system is low, and meanwhile, because the price of the prior audio test instrument is usually very expensive, the prior art uses a plurality of audio test instruments to build the test environment, so that the overall test cost is relatively high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a testing arrangement is provided to improve the efficiency of software testing to many speakers audio frequency passageway scenes, reduce the test cost simultaneously.
In a first aspect, an embodiment of the present invention provides a testing apparatus, the apparatus includes:
the audio signal transmission unit is connected to the plurality of loudspeakers and is used for transmitting original audio signals from the audio signal source to the loudspeakers through corresponding audio signal transmission channels;
the analog load is used for extracting the audio signal to be detected of the connected audio signal transmission channel;
a relay disposed between the analog load and each of the audio signal transmission channels, the relay for selectively connecting the analog load with a target audio signal transmission channel;
and the audio signal processing circuit is connected with the analog load and used for converting the original audio signal and the audio signal to be tested into corresponding digital signals for comparison test.
Further, the audio signal transmission unit includes an audio signal transmission interface or an audio signal line.
Further, the audio signal transmission unit is connected with each loudspeaker through the vehicle-mounted device system.
Further, the audio signal source comprises an upper computer.
Furthermore, the relay is a USB programmable relay, and the relay is also connected with the upper computer through a USB interface.
Further, the relay is used for connecting the corresponding target audio signal transmission channel with the analog load according to the control instruction output by the upper computer.
Further, a filter circuit is further included in the relay and is used for suppressing pulse spikes.
Further, the audio signal processing circuit comprises a mono sound card.
Further, the audio signal processing circuit includes a multi-channel sound card.
Further, the number of the target audio signal transmission channels corresponds to the number of channels of the multi-channel sound card.
The utility model discloses testing arrangement includes audio signal transmission unit, dummy load, relay and audio signal processing circuit. The audio signal transmission unit is connected to the plurality of speakers and used for transmitting original audio signals from an audio signal source to the speakers through corresponding audio signal transmission channels respectively, the analog load is used for extracting audio signals to be tested of the connected audio signal transmission channels, the relay is arranged between the analog load and each audio signal transmission channel and used for selectively connecting the analog load with a target audio signal transmission channel, and the audio signal processing circuit is connected with the analog load and used for converting the original audio signals and the audio signals to be tested into corresponding digital signals to perform comparison testing. By the test device, the test efficiency of a multi-loudspeaker audio channel scene can be improved, and the test cost is reduced.
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The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a prior art test system;
fig. 2 is a schematic diagram of a testing apparatus according to an embodiment of the present invention;
fig. 3 is an application schematic diagram of the testing apparatus according to the embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Meanwhile, it should be understood that, in the following description, a "circuit" refers to a conductive loop constituted by at least one element or sub-circuit through electrical or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or element/circuit is referred to as being "connected between" two nodes, it may be directly coupled or connected to the other element or intervening elements may be present, and the connection between the elements may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that there are no intervening elements present.
Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be understood that the testing device in the embodiments of the present invention is not limited to testing multiple speaker channels of a vehicle, and any scenes such as dance hall, school, or song hall that possess multiple speaker channels can be tested through the testing device in the embodiments of the present invention.
FIG. 1 is a schematic diagram of a prior art test system. As shown in fig. 1, in the prior art, a plurality of audio test devices 12 are generally connected to audio channels 13 of speakers respectively to establish a corresponding test environment, and then a high performance host 11 is used to control each audio test device 12 to implement a test operation on each audio channel 13 of speakers.
However, the construction process of such a test system shown in fig. 1 is complicated, so that the test efficiency is low. Meanwhile, since the price of the audio testing device 12 is usually very expensive, the existing testing system using a plurality of audio testing devices 12 to build a testing environment may cause the overall testing cost to be relatively high.
Therefore, the embodiment of the utility model provides a testing arrangement is provided to improve the efficiency of software testing to many speakers audio frequency passageway scenes, reduce the test cost simultaneously.
It is noted that each in-vehicle system typically includes a corresponding audio processing circuit. The audio processing circuit is used for processing the received audio signals after the vehicle-mounted system receives the audio signals, and transmitting the processed audio signals to subordinate speakers so that the speakers can play the processed audio signals. But at the in-process of handling and transmitting audio signal, audio signal can inevitable receive the interference or the loss appears, the utility model discloses testing arrangement in each embodiment specifically can be used for testing the audio signal transmission channel of each speaker.
Fig. 2 is a schematic diagram of a testing apparatus according to an embodiment of the present invention. As shown in fig. 2, the test apparatus includes an audio signal transmission unit 211, a relay 212, an analog load 213, and an audio signal processing circuit 214.
The audio signal transmission unit 211 is connected to the audio signal source 24 and the plurality of speakers 23, and the audio signal transmission unit 211 is configured to transmit the original audio signal from the audio signal source 24 to each of the speakers 23 through a corresponding audio signal transmission channel.
It should be understood that the audio signal source 24 may specifically be an upper computer for generating an original audio signal. Alternatively, the audio signal source 24 may be other related devices capable of generating audio signals. The plurality of speakers 23 may be speakers subordinate to each in-vehicle system. It is to be noted that the audio processing circuit of each vehicle-mounted system is omitted in the dotted line portion in the figure.
Further, the on-board systems may be connected to each other via a bus to transfer data. In this embodiment, for convenience of management and control, the audio signal transmission unit 211 may be specifically connected to a vehicle-mounted device 22 of a vehicle, and the vehicle-mounted device 22 is connected to the speakers 23 in each vehicle-mounted device through a corresponding bus, so as to transmit the audio signal to each of the speakers 23.
In an alternative embodiment, the audio signal transmission unit 211 may also be connected directly to the speakers 23 in the respective vehicle systems via a corresponding bus.
Optionally, the bus may specifically include at least one or a combination of a CAN (Controller Area Network) bus, a LIN (Local Interconnect Network), a FlexRay bus, or a MOST (Media organized System Transport) bus.
Alternatively, the Audio signal transmission unit 211 may specifically be an Audio signal transmission interface, such as a TRS interface, an XLR interface, an RCA interface, an AES (Audio Engineering Society/European Broadcast Union) interface, an S/PDIF (Sony/Philips Digital interconnection Format) interface, or an OPTICAL interface, which is not limited in this respect, or the Audio signal transmission unit 211 may also be a corresponding Audio signal line.
It should be understood that, other components related to audio signal transmission in the testing apparatus of this embodiment may also be connected by using any interface in the related types described above, and details thereof are not described later.
The relay 212 is provided between the analog load 213 and each audio signal transmission channel. The relay 212 is used to selectively connect the analog load 213 with a target audio signal transmission channel.
It should be understood that, in order to ensure the test accuracy, the analog load 213 may be specifically connected to the audio signal output terminal of each audio signal transmission channel, that is, the audio signal input terminal of each of the speakers 23.
Optionally, in order to enable a tester to adjust the currently tested audio channel according to actual requirements, the relay 212 in this embodiment may specifically be a USB programmable relay, and at this time, the relay 212 may be connected to the upper computer through a USB interface. The upper computer can output a corresponding control instruction under the control of a tester, and the relay 212 can switch and adjust a target audio signal transmission channel connected with the analog load 213 according to the control instruction after receiving the control instruction.
It should be appreciated that in an alternative implementation, the relay 212 may also implement the test alone without relying on the control of the host computer. Specifically, the relay 212 may cyclically switch the target audio signal transmission channel connected to the analog load 213 in a predetermined sequence set in advance by a tester.
Optionally, since the relay 212 may generate current during the on/off process, in order to avoid voltage oscillation caused by the generated pulse spike, the relay 212 in this embodiment may further include a filter circuit, and the filter circuit may be configured to suppress the pulse spike generated by the relay 212 during the on/off process.
The analog load 213 is used to extract the audio signal to be tested of the connected audio signal transmission channel. Optionally, the analog load 213 may specifically be a power resistor for simulating an impedance of a speaker.
The audio signal processing circuit 214 is connected to the audio signal source 24 and the analog load 213, and the audio signal processing circuit 214 is configured to convert an original audio signal and an audio signal to be tested into corresponding digital signals for performing a contrast test.
It should be understood that the comparison may be performed by comparing the matching degrees of the two digital signals to determine the loss or interference degree of the original audio signal during transmission, and then determining the transmission quality of each audio signal transmission channel according to the loss or interference degree.
Optionally, the audio signal processing circuit 214 may specifically be an audio card, that is, a sound card, for implementing interconversion between sound waves and digital signals. Optionally, in order to further save the test cost, the audio signal processing circuit 214 may specifically use a monaural sound card.
In an alternative implementation, the audio signal processing circuit 214 may also be a multi-channel sound card. At this time, the target audio signal transmission channels may be multiple, that is, the test device may simultaneously compare the audio signals to be tested transmitted by the multiple target audio signal transmission channels. It should be understood that the number of target audio signal transmission channels may correspond to the number of channels of the multi-channel sound card.
Specifically, in practical applications, the audio signal transmission unit 211 sends the original audio signal to the subordinate speakers 23 of each vehicle-mounted system through the vehicle-mounted system 22. The relay 212 may selectively switch a target audio signal transmission channel connected to the analog load 213. The analog load 213 extracts the audio signal to be tested in the currently connected target audio signal transmission channel and transmits the audio signal to be tested to the audio signal processing circuit 214. The audio signal processing circuit 214 converts the audio signal to be tested and the original audio signal into corresponding digital signals and compares the digital signals to determine the transmission quality of the audio signal transmission channel of the speaker.
Therefore, the testing device in the embodiment can complete the construction of the testing environment only by the USB programming relay, the sound card and the additional simple power supply and the simulation load, and can realize the testing of multiple audio signal transmission channels on the basis.
Fig. 3 is an application schematic diagram of the testing apparatus according to the embodiment of the present invention. Fig. 3 shows the transmission process of the audio signal during the application process of the testing device.
Specifically, the upper computer 31 may transmit the original audio signal to the audio signal transmission unit 32 and the audio signal processing circuit 37, respectively, after generating the original audio signal. After receiving the original audio signals, the audio signal transmission unit 32 transmits the original audio signals to the speakers 34 of each vehicle-mounted system through the vehicle-mounted system 33. The relay 35 can switch and adjust a target audio signal transmission channel connected with the analog load 36 by receiving a control instruction sent by the upper computer 31. The analog load 36 extracts the audio signal to be tested in the currently connected target audio signal transmission channel and transmits the audio signal to be tested to the audio signal processing circuit 37. After receiving the audio signal to be tested, the audio signal processing circuit 37 may convert the audio signal to be tested and the original audio signal into corresponding digital signals and compare the digital signals, so as to determine the transmission quality of the audio signal transmission channels of the speakers.
The utility model discloses testing arrangement includes audio signal transmission unit, dummy load, relay and audio signal processing circuit. The audio signal transmission unit is connected to the plurality of speakers and used for transmitting original audio signals from an audio signal source to the speakers through corresponding audio signal transmission channels respectively, the analog load is used for extracting audio signals to be tested of the connected audio signal transmission channels, the relay is arranged between the analog load and each audio signal transmission channel and used for selectively connecting the analog load with a target audio signal transmission channel, and the audio signal processing circuit is connected with the analog load and used for converting the original audio signals and the audio signals to be tested into corresponding digital signals to perform comparison testing. By the test device, the test efficiency of a multi-loudspeaker audio channel scene can be improved, and the test cost is reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A test apparatus, the apparatus comprising:
the audio signal transmission unit is connected to the plurality of loudspeakers and is used for transmitting original audio signals from the audio signal source to the loudspeakers through corresponding audio signal transmission channels;
the analog load is used for extracting the audio signal to be detected of the connected audio signal transmission channel;
a relay disposed between the analog load and each of the audio signal transmission channels, the relay for selectively connecting the analog load with a target audio signal transmission channel;
and the audio signal processing circuit is connected with the analog load and used for converting the original audio signal and the audio signal to be tested into corresponding digital signals for comparison test.
2. The apparatus of claim 1, wherein the audio signal transmission unit comprises an audio signal transmission interface or an audio signal line.
3. The apparatus of claim 1, wherein the audio signal transmission unit is connected to each of the speakers through a car-in-vehicle system.
4. The apparatus of claim 1, wherein the audio signal source comprises an upper computer.
5. The device of claim 4, wherein the relay is a USB programmable relay, and the relay is further connected with the upper computer through a USB interface.
6. The device of claim 5, wherein the relay is configured to connect the corresponding target audio signal transmission channel with the analog load according to a control command output by the upper computer.
7. The apparatus of claim 5, further comprising a filter circuit in the relay, the filter circuit configured to suppress pulse spikes.
8. The apparatus of any of claims 1-4, wherein the audio signal processing circuit comprises a mono sound card.
9. The apparatus of claim 1, wherein the audio signal processing circuit comprises a multi-channel sound card.
10. The apparatus of claim 9, wherein the number of target audio signal transmission channels corresponds to the number of channels of the multi-channel sound card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222501597.0U CN218570473U (en) | 2022-09-21 | 2022-09-21 | Testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222501597.0U CN218570473U (en) | 2022-09-21 | 2022-09-21 | Testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218570473U true CN218570473U (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222501597.0U Active CN218570473U (en) | 2022-09-21 | 2022-09-21 | Testing device |
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| CN (1) | CN218570473U (en) |
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