CN216565601U - Working state detection circuit and vehicle-mounted equipment - Google Patents
Working state detection circuit and vehicle-mounted equipment Download PDFInfo
- Publication number
- CN216565601U CN216565601U CN202122825600.XU CN202122825600U CN216565601U CN 216565601 U CN216565601 U CN 216565601U CN 202122825600 U CN202122825600 U CN 202122825600U CN 216565601 U CN216565601 U CN 216565601U
- Authority
- CN
- China
- Prior art keywords
- speaker
- resistor
- signal
- module
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 117
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005236 sound signal Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000005034 decoration Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Images
Landscapes
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The embodiment of the application provides a working state detection circuit and vehicle-mounted equipment, wherein the working state detection circuit is applied to the vehicle-mounted equipment, the vehicle-mounted equipment further comprises a loudspeaker module, and the working state detection circuit comprises a detection module, wherein the loudspeaker module is used for controlling the loudspeaker to work and outputting an AD (analog-to-digital) signal for detecting the working state of the loudspeaker; the detection module is used for collecting the AD signal and determining the working state of the loudspeaker according to the voltage value of the AD signal. The embodiment of the application solves the problem that the working state detection of the loudspeaker in the vehicle-mounted equipment is too complex in the prior art.
Description
Technical Field
The application relates to the field of vehicle-mounted equipment, in particular to a working state detection circuit and the vehicle-mounted equipment.
Background
At present, the car audio almost becomes a standard device of the vehicle, and is one of the core devices of the car entertainment system. Generally, each car audio set includes at least one speaker, which is a sound generating unit of the car audio set and is a transducer device capable of converting an electrical signal into an acoustic signal.
With the increase of the on-board equipment in the vehicle, the related wire harnesses are more and more, so that the wiring is more and more complicated. For complicated wiring, it is particularly important to detect the connection state of the wire harness. Taking the speaker in the car audio as an example, in the related art, a waveform with a fixed frequency can be used to scan the speaker, and the impedance of the speaker can be calculated through coding and decoding or level jump. This approach is not only complex to operate, poor in real-time, but also relatively costly.
From the above, how to simply and conveniently realize the working state detection of the loudspeaker in the vehicle-mounted equipment needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
Embodiments of the present application provide a working state detection circuit and a vehicle-mounted device, which can solve the problem that the working state detection of a speaker in the vehicle-mounted device in the related art is too complex. The technical scheme is as follows:
according to an aspect of an embodiment of the present application, an operating state detection circuit is applied to an on-board device, the on-board device further includes a speaker module, and the operating state detection circuit includes a detection module, wherein the speaker module is configured to control a speaker to operate and output an AD signal for detecting an operating state of the speaker; the detection module is used for collecting the AD signal and determining the working state of the loudspeaker according to the voltage value of the AD signal.
In one embodiment, the detection module comprises a processor including a first control output, a second control output and an analog-to-digital converter, wherein the first control output and the second control output respectively transmit detection signals to the speaker module to operate the speaker; the analog-to-digital converter is used for collecting the AD signal to obtain a detection result, and the detection result is used for indicating the voltage value of the AD signal.
In one embodiment, the interface type of the first control output terminal and the second control output terminal is a GPIO interface.
In one embodiment, the first control output is connected to the speaker module through a first resistor.
In one embodiment, the second control output terminal is connected with the loudspeaker module through a second resistor.
In one embodiment, a resistance voltage division circuit is connected between the analog-to-digital converter and the loudspeaker module.
In one embodiment, the resistance voltage divider circuit includes a third resistor and a fourth resistor connected in series at one end, the other end of the third resistor is connected to the speaker module, and the other end of the fourth resistor is grounded.
In one embodiment, the resistor voltage-dividing circuit further includes a capacitor connected in parallel with the fourth resistor, one end of the capacitor is further connected to the analog-to-digital converter, and the other end of the capacitor is grounded.
In one embodiment, the speaker module includes a power amplifier and the speaker, the power amplifier including a pair of differential outputs, the power amplifier transmitting an audio signal to the speaker through the pair of differential outputs to operate the speaker.
According to an aspect of the embodiments of the present application, an in-vehicle apparatus includes the operating state detection circuit as described above.
The beneficial effect that technical scheme that this application provided brought is:
in the above technical solution, the vehicle-mounted device controls the processor to output the first detection signal, so as to enable the power amplifier to transmit the audio signal to the speaker based on the first detection signal, so as to enable the speaker to operate, and as the speaker starts to operate, the vehicle-mounted device controls the processor to perform AD signal acquisition on the speaker, so as to determine the operating state of the speaker according to the voltage value of the acquired AD signal, that is, the operating state detection on the speaker in the vehicle-mounted device is simply and conveniently realized through the output control and the AD acquisition of the processor, thereby effectively solving the problem that the operating state detection on the speaker in the vehicle-mounted device in the related art is too complex.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
FIG. 1 is a schematic diagram illustrating an operational status detection circuit in accordance with an exemplary embodiment;
FIG. 2 is a schematic diagram of an operating condition detection circuit according to another exemplary embodiment;
FIG. 3 is a flow chart illustrating a method of operating condition detection according to an exemplary embodiment;
FIG. 4 is a flowchart of a method in an exemplary embodiment of step 370, shown in the embodiment of FIG. 3;
FIG. 5 is a detailed block diagram of an operation status detection circuit in an application scenario;
FIG. 6 is a diagram illustrating an implementation of a method for detecting a working state in an application scenario;
fig. 7 is a block diagram illustrating a configuration of an operation state detection apparatus according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an operation state detection circuit shown in an exemplary embodiment. Referring to fig. 1, in an exemplary embodiment, the vehicle-mounted device 100 includes an operating state detection circuit 110 and a speaker module 130, and the operating state detection circuit 110 includes a detection module. The speaker module 130 is configured to control the operation of the speaker and output an AD signal for detecting the operating state of the speaker. And the detection module is used for acquiring the AD signal and determining the working state of the loudspeaker according to the voltage value of the AD signal.
It should be noted that the AD signal may also be understood as a current signal or a voltage signal, which is not limited herein. In one embodiment, the detection module may include an Analog to Digital Converter (ADC) to collect the current/voltage signal through the ADC.
Fig. 2 is a schematic diagram of an operation state detection circuit shown in another exemplary embodiment. Referring to fig. 2, in an exemplary embodiment, the operation status detecting circuit 110 includes a detecting module 111, and the detecting module 111 includes a processor 1111. Further, the processor 1111 includes a first control output, a second control output, and an analog-to-digital converter.
With continued reference to fig. 2, in an exemplary embodiment, the speaker module 130 includes a power amplifier 131 and at least one speaker 133. The power amplifier 131 includes a pair of differential output terminals, so as to transmit the audio signal to the speaker 133 through the pair of differential output terminals, so that the speaker 133 operates. The impedance of the speaker can be flexibly adjusted according to the actual needs of the application scenario, and is not limited herein, for example, the impedance of the speaker includes but is not limited to: 4 Ω or 8 Ω.
Thus, the first control output terminal and the second control output terminal can transmit the detection signal to the speaker module 130 to operate the speaker 133. The analog-to-digital converter is configured to perform AD signal acquisition on the speaker 133 to obtain a detection result, so as to determine an operating state of the speaker 133 according to a voltage value of the AD signal indicated by the detection result.
In one embodiment, the interface type of the first control output terminal and the second control output terminal is a General-purpose input/output (GPIO) interface.
Further, as shown in fig. 2, in an exemplary embodiment, the first control output is connected to the speaker module 130 through a first resistor. The second control output terminal is connected to the speaker module 130 through a second resistor. A resistance voltage division circuit is connected between the analog-to-digital converter and the speaker module 130.
In one embodiment, the resistor divider circuit includes a third resistor and a fourth resistor connected in series at one end, the other end of the third resistor is connected to the speaker module 130, and the other end of the fourth resistor is grounded.
In one embodiment, the resistor voltage-dividing circuit further includes a capacitor connected in parallel with the fourth resistor, one end of the capacitor is further connected with the analog-to-digital converter, and the other end of the capacitor is grounded to achieve the interference filtering effect.
In one embodiment, the first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance. The resistance value can be flexibly set according to the actual needs of the application scene. In one application scenario, the value is in the order of K Ω, for example, the resistance value is 10K Ω.
In one embodiment, the capacitance value of the capacitor can be flexibly set according to the actual needs of the application scenario. In one application scenario, the value is nF level, for example, the capacitance value is 10 nF.
Through the working state detection circuit, the working state detection of the loudspeaker in the vehicle-mounted equipment can be simply and conveniently realized, the operation is simple, the real-time performance is good, the fault of the loudspeaker can be timely found, and the cost is favorably reduced.
Now, the operation state detection process of the speaker in the in-vehicle device will be described in detail with reference to the above operation state detection circuit.
Referring to fig. 3, an embodiment of the present application provides an operating state detection method, which is suitable for the vehicle-mounted device 100 shown in fig. 2.
In the following method embodiments, for convenience of description, the execution subject of each step is described as an in-vehicle device, but the method is not particularly limited thereto.
As shown in fig. 3, the operation detection method may include the steps of:
in step 310, the control processor outputs a first detection signal.
As shown in fig. 2, the processor 1111 includes a first control output and a second control output. The first control output terminal is connected to the speaker module 130 through a first resistor, and the second control output terminal is connected to the speaker module 130 through a second resistor.
Accordingly, step 310 may include the steps of: and controlling the first control output end to output a first detection signal with high level, and controlling the second control output end to output a first detection signal with high resistance state.
In one embodiment, the voltage value of the first detection signal in the high level state is 3.3v, and the voltage value of the first detection signal in the high impedance state is 0 v.
Therefore, the first detection signal can be transmitted to the loudspeaker module through the first control output end and the second control output end so as to enable the loudspeaker to work.
Based on the first detection signal, the power amplifier transmits an audio signal to the speaker to operate the speaker, step 330.
As shown in fig. 2, as the first detection signal is transmitted to the speaker module 130 through the first control output terminal and the second control output terminal, respectively, in the speaker module 130, the power amplifier 131 can transmit the audio signal to the speaker 133, so that the speaker 133 operates.
And 350, controlling the processor to acquire the AD signal of the loudspeaker to obtain a first detection result.
As shown in fig. 2, the processor 1111 further includes an analog-to-digital converter connected to the speaker module 130 through a resistor divider circuit.
Based on this, as the speaker enters the working state, the processor 1111 can control the analog-to-digital converter to perform the AD signal acquisition on the speaker, so as to obtain a first detection result indicating the voltage value of the AD signal. The first detection result is used for indicating the voltage value of the acquired AD signal.
In one embodiment, the voltage values indicated by the first detection result include at least 1.1v, 3.3v, 0 v.
And step 370, determining the working state of the loudspeaker according to the voltage value indicated by the first detection result.
As the speaker enters an operational state, it will be appreciated that if the speaker is not installed in place, or the wiring harness of the speaker ages, an open circuit condition of the speaker may result. In addition, the inventor also finds that as the number of the vehicle-mounted devices in the vehicle increases, the wiring in the vehicle is more complicated, the power line and the wiring harness of the loudspeaker can be bundled together, and then, as the wiring harness of the loudspeaker ages, after the vehicle-mounted devices are powered on, the power line and the wiring harness of the loudspeaker can be caused to be short-circuited together, so that the phenomenon of short power supply of the loudspeaker occurs, or the ground line and the wiring harness of the loudspeaker are caused to be short-circuited together, so that the phenomenon of short ground of the loudspeaker occurs.
Based on this, in one embodiment, the operational state of the speaker includes at least a first state, a second state, a third state, and a fourth state. Specifically, the first state is normal connection, the second state is short power, the third state is open circuit, and the fourth state is short ground.
Thus, step 370 may include the steps of:
and if the first detection result indicates that the voltage value is the first set value, determining that the working state of the loudspeaker is the first state. In one embodiment, the first set point is 1.1 v.
And if the first detection result indicates that the voltage value is the second set value, determining that the working state of the loudspeaker is the second state. In one embodiment, the second set point is 3.3 v.
And if the first detection result indicates that the voltage value is the third set value, determining that the working state of the loudspeaker is the third state or the fourth state. In one embodiment, the third set value is 0 v.
Further, the inventor has realized that when the working state of the speaker is the third state or the fourth state, and the first detection result indicates that the voltage value of the collected AD signal is the same, it cannot be determined which kind of fault occurs in the speaker, and for this reason, referring to fig. 4, in an exemplary embodiment, if the first detection result indicates that the voltage value is the third set value, the step of determining that the working state of the speaker is the third state or the fourth state may include the following steps:
in step 371, when the first detection result indicates that the voltage value is the third set value, the control processor outputs a second detection signal.
As shown in fig. 2, the processor 1111 includes a first control output and a second control output. Accordingly, in one embodiment, step 371 may include the steps of: and controlling the first control output end to output a second detection signal in a high-impedance state, and controlling the second control output end to output a second detection signal in a high level.
In one embodiment, the voltage value of the second detection signal in the high impedance state is 0v, and the voltage value of the second detection signal in the high level is 3.3 v.
Thereby, the second detection signal will be transmitted to the speaker module via the first control output and the second control output in order to determine whether the operational state of the speaker is the third state or the fourth state.
And step 373, based on the second detection signal, controlling the processor to perform AD signal acquisition on the speaker to obtain a second detection result.
As shown in fig. 2, the processor 1111 further includes an analog-to-digital converter, and when the processor 1111 controls to output the second detection signal, the processor 1111 can control the analog-to-digital converter to perform AD signal acquisition on the speaker 133 to obtain a second detection result indicating a voltage value of the AD signal.
And the second detection result is used for indicating the voltage value of the acquired AD signal.
In one embodiment, the voltage values indicated by the second detection result include at least 0v, 1.1 v.
In step 375, if the second detection result indicates that the voltage value of the collected AD signal is the fourth set value, it is determined that the working state of the speaker is the third state.
In one embodiment, the fourth set point is 1.1 v.
In step 377, if the second detection result indicates that the voltage value of the collected AD signal is the fifth set value, it is determined that the working state of the speaker is the fourth state.
In one embodiment, the fifth set value is 0 v.
Of course, the above setting values can be flexibly adjusted according to the actual needs of the application scenario, and are not limited in this respect.
Through the mutual cooperation of the above-mentioned embodiment, the vehicle-mounted device just can judge the operating condition of speaker through the voltage value that detects AD signal, and not only easy operation, real-time good can in time discover the trouble that the speaker exists, are favorable to reduce cost moreover.
Fig. 5 shows a specific structure diagram of a working state detection circuit in an application scenario, and fig. 6 shows a specific implementation diagram of a working state detection method in an application scenario. Now, with reference to fig. 5 and fig. 6, the principle of detecting the operating state of the speaker in this application scenario is described as follows:
as shown in fig. 5, in this application scenario, the vehicle-mounted device includes but is not limited to: vehicle-mounted sound, a vehicle-mounted multimedia host and a vehicle-mounted T-BOX.
Further, the in-vehicle apparatus includes an operating state detection circuit and a speaker module. The working state detection circuit comprises a detection module U2, and the loudspeaker module comprises a power amplifier U1 and a loudspeaker U3.
Further, the detection module U2 includes a processor MCU.
Further, the processor MCU includes a first control output terminal GPIO1, a second control output terminal GPIO2, and an analog-to-digital converter ADC.
Further, the power amplifier U1 includes a pair of differential output terminals OUT + and OUT-.
Further, the first control output terminal GPIO1 is connected to the speaker module through a first resistor R2, i.e., a; the second control output terminal GPIO2 is connected to the speaker module, i.e., B, through a second resistor R1; the analog-to-digital converter ADC is connected with the loudspeaker module through a resistance voltage division circuit, namely B.
Further, the resistance voltage division circuit comprises a third resistor R3 and a fourth resistor R4 which are connected in series. One end of the third resistor R3 is connected to the speaker module, i.e., B, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, i.e., C, and the other end of the fourth resistor R4 is grounded.
Further, the resistance voltage-dividing circuit further comprises a capacitor C1 connected in parallel with the fourth resistor R4, so as to achieve the purpose of interference filtering. One end of the capacitor C1 is connected to the analog-to-digital converter ADC, i.e. D, and the other end of the capacitor C1 is grounded.
Further, in the working state detection circuit, the resistances of the first resistor R2, the second resistor R1, the third resistor R3 and the fourth resistor R4 are the same and are all 10K Ω; the capacitance value of the capacitor C1 is 10 nF; the impedance of the speaker U3 is 8 Ω.
As shown in fig. 6, after the vehicle-mounted device is powered on, the processor MCU controls the first control output terminal GPIO1 to output the first detection signal with a high level voltage value of 3.3v, and controls the second control output terminal GPIO2 to output the first detection signal with a high impedance voltage value of 0v, so that the speaker U3 enters a working state.
When the speaker U3 is normally connected, on one hand, since the second control output terminal GPIO2 outputs the first detection signal in the high impedance state with the voltage value of 0v, the second resistor R1 can be ignored; on the other hand, since the speaker U3 having the impedance of 8 Ω can be ignored compared to the resistance values of the first resistor R2, the third resistor R3, and the fourth resistor R4 being 10K Ω, the voltage value Vspk of the AD signal is calculated from the first detection signal having the voltage value of 3.3V, the first resistor R2, the third resistor R3, and the fourth resistor R4, that is:
when the speaker U3 is short-circuited to the power supply (12V), on one hand, the impedance of the speaker U3 with impedance of 8 Ω is negligible compared with the resistances of the first resistor R2, the third resistor R3 and the fourth resistor R4 which are 10K Ω; on the other hand, since the second control output terminal GPIO2 outputs the first detection signal with a voltage value of 0V in a high impedance state, the second resistor R1 is negligible, and since the speaker U3 is shorted to the 12V power supply, which is equivalent to the 12V power supply directly acting on the third resistor R3, the first resistor R2 is also negligible, so the voltage value Vspk of the AD signal is calculated by the 12V power supply, the third resistor R3, and the fourth resistor R4, that is:
it is noted here that since the processor MCU is powered at 3.3V, the maximum voltage that the analog-to-digital converter ADC can detect is also 3.3V, and then when the calculated voltage value Vspk is equal to 6V, the actual voltage value Vspk of the AD signal is equal to 3.3V.
When the speaker U3 is open or short-circuited, the voltage value Vspk of the AD signal is equal to 0 v.
Based on this, as the speaker U3 enters the working state, the processor MCU controls the analog-to-digital converter ADC to acquire the AD signal, so as to obtain a first detection result indicating the voltage value Vspk of the AD signal.
If the voltage value Vspk is equal to 1.1v, the operation state of the speaker U3 is normally connected.
If the voltage value Vspk is equal to 3.3v, the operation state of the speaker U3 is a short power supply.
If the voltage value Vspk is equal to 0v, the operating state of the speaker U3 is an open circuit or a short circuit, at this time, the processor MCU further controls the first control output terminal GPIO1 to output the second detection signal with the voltage value of 0v in the high impedance state, and controls the second control output terminal GPIO2 to output the second detection signal with the voltage value of 3.3v in the high level, so as to further determine whether the operating state of the speaker U3 is an open circuit or a short circuit based on the second detection result obtained by the processor MCU.
When the speaker U3 is open, on one hand, since the first control output terminal GPIO1 outputs the second detection signal in the high impedance state with the voltage value of 0v, and the speaker U3 is open, the first resistor R2 can be ignored; on the other hand, since the speaker U3 having the impedance of 8 Ω can be ignored compared to the resistance values of the second resistor R1, the third resistor R3, and the fourth resistor R4 being 10K Ω, the voltage value Vspk of the AD signal is calculated from the second detection signal having the high level voltage value of 3.3V, the second resistor R1, the third resistor R3, and the fourth resistor R4, that is:
when the speaker is short, the voltage value Vspk of the AD signal is equal to the voltage value of the ground, and both are equal to 0 v.
Based on this, if the voltage value is equal to 1.1v, the operation state of the speaker U3 is open.
If the voltage value is equal to 0v, the operational state of the speaker U3 is short ground.
In this application scenario, GPIO control and AD sampling through treater MCU have realized simply conveniently that the operating condition to speaker among the mobile unit detects, need not artifical participation and can fix a position whether speaker breaks down among the mobile unit fast, are favorable to the car owner to in time handle this trouble to avoid influencing the car owner and experience because of the speaker trouble.
The following are embodiments of the apparatus of the present application, which can be used to perform the method for detecting an operating state of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, please refer to the method embodiments of the method for detecting an operating state referred to in the present application.
Referring to fig. 7, in an embodiment of the present application, an operating condition detecting apparatus 600 is provided, where the operating condition detecting apparatus 600 is applied to a vehicle-mounted device, and the vehicle-mounted device includes a processor, a power amplifier, and at least one speaker.
The operation status detection apparatus 600 includes, but is not limited to: an output control module 610, a speaker operation module 630, an AD acquisition module 650, and a status determination module 670.
The output control module 610 is configured to control the processor to output the first detection signal.
And a speaker operating module 630, configured to transmit the audio signal to the speaker by the power amplifier based on the first detection signal, so as to operate the speaker.
And the AD acquisition module 650 is configured to control the processor to acquire an AD signal of the speaker to obtain a first detection result, where the first detection result is used to indicate a voltage value of the acquired AD signal.
And the state determining module 670 is configured to determine an operating state of the speaker according to the voltage value indicated by the first detection result.
It should be noted that, when the operating state detection apparatus provided in the foregoing embodiment detects the operating state of the speaker in the vehicle-mounted device, the division of the functional modules is merely used as an example, and in practical applications, the functions may be distributed to different functional modules according to needs, that is, the internal structure of the operating state detection apparatus is divided into different functional modules to complete all or part of the functions described above.
In addition, the working state detection apparatus provided in the above embodiments and the working state detection method belong to the same concept, and the specific manner in which each module performs operations has been described in detail in the method embodiments, and is not described again here.
Compared with the prior art, the working state detection of the loudspeaker in the vehicle-mounted equipment is simply and conveniently realized through the output control and AD acquisition of the processor, the operation is simple, the real-time performance is good, the fault existing in the loudspeaker can be found in time, and the cost is reduced.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A working state detection circuit is applied to vehicle-mounted equipment, and the vehicle-mounted equipment also comprises a loudspeaker module, and is characterized in that the working state detection circuit comprises a detection module,
the loudspeaker module is used for controlling a loudspeaker to work and outputting an AD signal for detecting the working state of the loudspeaker;
the detection module is used for collecting the AD signal and determining the working state of the loudspeaker according to the voltage value of the AD signal.
2. The circuit of claim 1, wherein the detection module comprises a processor including a first control output, a second control output, and an analog-to-digital converter, wherein,
the first control output end and the second control output end respectively transmit detection signals to the loudspeaker module so as to enable the loudspeaker to work;
the analog-to-digital converter is used for collecting the AD signal to obtain a detection result, and the detection result is used for indicating the voltage value of the AD signal.
3. The circuit of claim 2, wherein the interface type of the first control output and the second control output is a GPIO interface.
4. The circuit of claim 2 wherein the first control output is connected to the speaker module through a first resistor.
5. The circuit of claim 2 wherein the second control output is connected to the speaker module through a second resistor.
6. The circuit of claim 2, wherein a resistive divider circuit is connected between the analog-to-digital converter and the speaker module.
7. The circuit of claim 6, wherein the resistor divider circuit comprises a third resistor and a fourth resistor connected in series at one end, the other end of the third resistor being connected to the speaker module, and the other end of the fourth resistor being connected to ground.
8. The circuit of claim 7, wherein the resistor divider circuit further comprises a capacitor connected in parallel with the fourth resistor, one end of the capacitor being further connected to the analog-to-digital converter, and the other end of the capacitor being connected to ground.
9. The circuit of any one of claims 1 to 8, wherein the speaker module comprises a power amplifier and the speaker, the power amplifier comprising a pair of differential outputs, the power amplifier transmitting an audio signal to the speaker through the pair of differential outputs to operate the speaker.
10. An in-vehicle apparatus characterized by comprising the operation state detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122825600.XU CN216565601U (en) | 2021-11-18 | 2021-11-18 | Working state detection circuit and vehicle-mounted equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122825600.XU CN216565601U (en) | 2021-11-18 | 2021-11-18 | Working state detection circuit and vehicle-mounted equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216565601U true CN216565601U (en) | 2022-05-17 |
Family
ID=81573487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122825600.XU Active CN216565601U (en) | 2021-11-18 | 2021-11-18 | Working state detection circuit and vehicle-mounted equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216565601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257941A (en) * | 2021-11-18 | 2022-03-29 | 慧翰微电子股份有限公司 | Working state detection method and vehicle-mounted equipment |
-
2021
- 2021-11-18 CN CN202122825600.XU patent/CN216565601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257941A (en) * | 2021-11-18 | 2022-03-29 | 慧翰微电子股份有限公司 | Working state detection method and vehicle-mounted equipment |
| CN114257941B (en) * | 2021-11-18 | 2024-08-16 | 慧翰微电子股份有限公司 | Working state detection method and vehicle-mounted equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101324633A (en) | Rotary speed sensor with bus interface for automobile | |
| CN216565601U (en) | Working state detection circuit and vehicle-mounted equipment | |
| CN111443276A (en) | Detection circuit, method and device for high-voltage interlocking loop and automobile | |
| CN103778688A (en) | Car operation data acquisition device based on car diagnosis technology | |
| CN104237624B (en) | EV (electric vehicle) direct-current high-voltage sensor and sampling method thereof | |
| CN111025248A (en) | Data acquisition playback device and data acquisition playback system | |
| CN113242532B (en) | Vehicle communication device, wiFi connection method and vehicle diagnosis system | |
| CN112014673B (en) | DC charging pile detection equipment and method | |
| CN114257941B (en) | Working state detection method and vehicle-mounted equipment | |
| CN112291697A (en) | Loudspeaker open circuit detection circuit | |
| CN201903597U (en) | Detection device for engine cable | |
| CN101324634B (en) | Vehicle speed sensor with bus interface for vehicle | |
| CN102426452A (en) | Vehicle-mounted system with long-distance diagnostic function | |
| CN211554301U (en) | Data acquisition playback device and data acquisition playback system | |
| CN208255712U (en) | Hand-held type automobile diagnostic equipment based on CAN-BUS bus communication protocol | |
| CN110749798B (en) | High-power group charging direct current charging unit test system and test method | |
| CN110350473B (en) | Control circuit, method and device | |
| CN113992552A (en) | Automobile CAN/CANFD physical layer system testing device and method | |
| CN208255713U (en) | The hand-held type automobile diagnostic equipment of KWP2000 communication protocol based on K line | |
| CN108490294B (en) | Heavy-duty car generator fault detection device and method | |
| CN111694346A (en) | OBD universal protocol converter | |
| CN210270563U (en) | Data monitoring device for vehicle-mounted equipment | |
| CN212111741U (en) | Locomotive control power grounding monitoring device | |
| CN211123710U (en) | Data acquisition device and power supply unit | |
| CN204669379U (en) | A kind of CAN network fault simulation equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Building 1, 5th Floor, No. 116 Jiangbin East Avenue, Mawei District, Fuzhou City, Fujian Province, China Patentee after: FLAIRCOMM MICROELECTRONICS, Inc. Country or region after: China Address before: Building 1, 7th Floor, No.116 Jiangbin East Avenue, Mawei District, Fuzhou City, Fujian Province, China 351000 Patentee before: FLAIRCOMM MICROELECTRONICS, Inc. Country or region before: China |