Vehicle-mounted sound equipment wake-up circuit and vehicle-mounted sound equipment
By designing a car audio wake-up circuit, which utilizes a communication bus and control circuit to sense communication signals and output wake-up signals, the problem of increased costs in existing technologies is solved, and a wake-up method without additional wiring harnesses is achieved, thus improving energy efficiency.
Patent Information
- Application Number
- CN202520128060.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing car audio wake-up methods require CAN transceivers and MCU control chips, increasing costs. Hard-wired wake-up strategies also require additional physical wiring harnesses, increasing costs and complexity.
Design a vehicle audio wake-up circuit that senses communication signals through a communication bus and uses a control circuit to output a wake-up signal to wake up the vehicle audio system. The circuit includes a communication bus, a control circuit, and an optocoupler, which senses communication signals on the communication bus and outputs a wake-up signal.
This technology enables the vehicle audio system to be activated via a communication bus signal without the need for additional physical wiring harnesses, thereby reducing wiring harness costs and improving energy efficiency.
Smart Images
Figure CN223778317U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of automotive electronics, in particular to a vehicle audio awakening circuit and vehicle audio. BACKGROUND
[0002] In the prior art, the mainstream of the awakening mode of the vehicle audio is to wake up through the CAN bus in the working state, which requires a CAN transceiver and an MCU control chip to make a strategy, and can also make fault diagnosis.
[0003] However, some car manufacturers will remove the CAN and MCU for cost considerations, and adopt a hard-wire awakening strategy, which requires a physical wire harness to be introduced and other automobile components to send a signal to wake up, thereby bringing additional costs. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a vehicle audio awakening circuit and vehicle audio for awakening the vehicle audio when receiving a communication signal.
[0005] To solve the above technical problems, the present application provides a vehicle audio awakening circuit, which comprises a communication bus for transmitting a communication signal; and a control circuit connected with the communication bus signal, for outputting an awakening signal when sensing a communication signal on the communication bus, so as to awaken the vehicle audio.
[0006] Preferably, the control circuit comprises a power supply end for providing a power supply signal; a first triode connected with the power supply end, the collector of the first triode being connected with the power supply end, and the emitter of the first triode being connected with the vehicle audio for controlling the power supply end to provide the awakening signal to the vehicle audio; and a control unit, the input end of the control unit being connected with the communication bus, and the output end of the control unit being connected with the base of the first triode for providing a control signal to the base of the first triode according to the communication signal on the communication bus, so as to control the on / off of the collector and the emitter of the first triode.
[0007] Preferably, the control unit comprises an optoelectronic coupler, the optoelectronic coupler comprising a light-emitting element and an internal triode, the two ends of the light-emitting element being connected with the communication bus for emitting light when sensing a communication signal on the communication bus, and the internal triode being turned on when sensing the light-emitting element emitting light, so as to provide a control signal to the base of the first triode.
[0008] Preferably, the control unit further comprises a second triode arranged between the output of the optoelectronic coupler and the base of the first triode, the base of the second triode is connected with the output of the internal triode of the optoelectronic coupler, the emitter of the second triode is connected with the base of the first triode, and the collector of the second triode is connected with the ground; wherein the first triode is a PNP triode, and the second triode is an NPN triode.
[0009] Preferably, the optoelectronic coupler is further connected with the power supply end, in particular, the input of the internal triode is connected with the power supply end, and the output of the internal triode is connected with the base of the second triode to control the on / off of the second triode.
[0010] Preferably, the control unit further comprises an inductive circuit, the inductive circuit is connected with both ends of the light-emitting element to control the light-emitting element to emit light when the inductive circuit senses a communication signal on the communication bus.
[0011] Preferably, the communication bus comprises a positive wire and a negative wire; the inductive circuit comprises a first inductor and a second inductor; the positive wire is connected with the positive electrode of the light-emitting element through the first inductor, and the negative wire is connected with the negative electrode of the light-emitting element through the second inductor to make the light-emitting element emit light when the communication bus transmits a communication signal.
[0012] Preferably, the inductive circuit further comprises a diode arranged between the communication bus and the optoelectronic coupler, the positive electrode of the diode is connected with the positive wire, and the negative electrode of the diode is connected with the positive electrode of the light-emitting element of the optoelectronic coupler to control the signal flow direction between the communication bus and the optoelectronic coupler.
[0013] Preferably, the inductive circuit further comprises a third resistor, both ends of the third resistor are connected with the positive wire and the negative wire of the communication bus respectively; wherein both ends of the light-emitting element are connected with both ends of the third resistor respectively.
[0014] To solve the above technical problems, the application further provides a vehicle-mounted audio, which comprises the vehicle-mounted audio wake-up circuit as described in any one of the above embodiments.
[0015] The application has the following beneficial effects: the control circuit senses the communication signal on the communication bus, and outputs a wake-up signal when the communication signal on the communication bus is sensed, so as to wake up the entire vehicle-mounted audio and make the vehicle-mounted audio work, and when there is no communication signal on the communication bus, the vehicle-mounted audio remains in a dormant state, thereby achieving energy saving. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.
[0017] Figure 1 The structure schematic diagram of an embodiment of the vehicle-mounted audio awakening circuit provided by the present application is shown in the figure.
[0018] Figure 2 The structure schematic diagram of a first specific embodiment of the vehicle-mounted audio awakening circuit provided by the present application is shown in the figure.
[0019] Figure 3 The structure schematic diagram of a second specific embodiment of the vehicle-mounted audio awakening circuit provided by the present application is shown in the figure.
[0020] Figure 4 The structure schematic diagram of an embodiment of the vehicle-mounted audio provided by the present application is shown in the figure. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present application.
[0022] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless otherwise clearly indicated. "Multiple" generally includes at least two, but does not exclude the case of including at least one.
[0023] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.
[0024] It should be understood that the terms "comprise", "comprising", or any other variation thereof, used in the present document are intended to encompass non-exclusive inclusions, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by an "comprising" statement is not excluded from a process, method, article, or apparatus that includes the element, even if the statement "comprising" is not recited in the specification.
[0025] It should be noted that if the application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.
[0026] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0027] The application will be further described in conjunction with the drawings and specific embodiments.
[0028] The application provides a vehicle audio awakening circuit, please refer to Figure 1 , Figure 1 The structure diagram of an embodiment of the vehicle audio awakening circuit provided by the application is shown in Figure 1 The vehicle audio awakening circuit comprises a communication bus 10 for transmitting communication signals. A control circuit 20 is connected with the communication bus 10, and is used for outputting an awakening signal to awaken the vehicle audio 100 and make the vehicle audio 100 work when sensing that there is a communication signal on the communication bus 10.
[0029] The awakening signal is an awakening voltage or an enabling voltage.
[0030] Specifically, the communication bus 10 is used for transmitting communication signals between the controller 200 and the vehicle audio 100, or receiving communication signals transmitted by the controller 200 to the vehicle audio 100.
[0031] Specifically, the control circuit 20 outputs the awakening signal to the control chip of the vehicle audio 100 to awaken the vehicle audio 100 and make the vehicle audio 100 work. The awakening signal is a power signal.
[0032] The controller 200 is a master controller, and the vehicle audio 100 is a slave controller.
[0033] In the embodiment, the communication bus 10 is an A2B communication bus, and the transmission of the communication signal between the controller 200 and the vehicle audio 100 is implemented.
[0034] Further referring to Figure 2 , Figure 2 Fig. 1 is a structural schematic diagram of a first embodiment of the vehicle audio wake-up circuit provided in the present application. Figure 2 As shown in the figure, the control circuit 20 specifically includes a power supply end IN, a first triode T1, and a control unit 21.
[0035] The power supply end IN provides a power supply signal, including a power supply voltage.
[0036] The first triode T1 is connected with the power supply end IN, and is used to control the power supply end IN to provide a wake-up signal to the control chip MUC of the vehicle audio 100. Specifically, the collector of the first triode T1 is connected with the power supply end IN, and the emitter of the first triode T1 is connected with the vehicle audio 100, specifically connected with the control chip MUC of the vehicle audio 100, to provide the power supply signal to the control chip MUC of the vehicle audio 100.
[0037] The input end of the control unit 21 is connected with the communication bus 10, and the output end is connected with the base of the first triode T1, which is used to provide a control signal to the base of the first triode T1 according to the communication signal on the communication bus 10, to control the on / off of the collector and the emitter of the first triode T1, and further control the first triode T1 to provide the wake-up signal to the control chip MUC of the vehicle audio 100, to wake up the vehicle audio 100.
[0038] In a specific embodiment, the first triode T1 can be a PNP triode, or can be an NPN triode, which is not limited here.
[0039] Specifically, further referring to Figure 3 , Figure 3 Fig. 2 is a structural schematic diagram of a second embodiment of the vehicle audio wake-up circuit provided in the present application. Figure 3 As shown in the figure, the control unit 21 includes an optoelectronic coupler 210, which includes a light-emitting element 211 and an internal triode 212. The two ends of the light-emitting element 211 are connected with the communication bus 10, and are used to emit light when the communication signal on the communication bus 10 is sensed. The internal triode 212 is turned on when the light-emitting element 211 emits light, to provide a control signal to the base of the first triode T1.
[0040] In the embodiment, the photoelectric coupler 210 is used to convert the optical signal into an electrical signal to control the conduction of the first triode T1, and then provide the wake-up signal to the car audio 100.
[0041] In the specific embodiment, the control unit 21 further comprises a second triode T2, which is arranged between the output of the photoelectric coupler 210 and the base of the first triode T1, the base of the second triode T2 is connected with the output of the internal triode 212 of the photoelectric coupler 210, the emitter of the second triode T2 is connected with the base of the first triode T1, and the collector of the second triode T2 is connected with the ground wire.
[0042] In the embodiment, the first triode T1 is a PNP type triode, and the second triode is an NPN type triode.
[0043] In the embodiment, the emitter of the internal triode 212 in the photoelectric coupler 210 is connected with the collector of the first triode T1 at the same power supply end IN, so as to avoid using one signal to wake up the car audio 100. In other embodiments, the internal triode 212 and the first triode T1 are connected with different signals, then the second triode T2 can be used to control the on / off of the first triode T1, or the second triode T2 can be omitted, which is not limited herein.
[0044] In the embodiment, the collector of the first triode T1 is further connected with the base of the first triode T1 through the first resistor R1, and the collector and the base of the first triode T1 are divided by the first resistor R1 to ensure that the voltage difference between the collector and the base of the first triode T1 is 0.7V, so that the collector and the emitter of the first triode T1 are conducted, and the power supply signal is transmitted to ensure that the power supply end IN provides a stable wake-up signal to the control chip MUC of the car audio 100.
[0045] In the embodiment, the collector of the second triode T2 is further connected with the ground wire through the second resistor R2, which is equivalent to connecting the collector of the second triode T2 with the second resistor R2, to ensure that the voltage difference between the collector and the base of the second triode T2 is 0.7V, and the collector and the emitter of the second triode T2 are conducted.
[0046] In the embodiment, the opto-coupler 210 is also connected with the power terminal IN. Specifically, the input terminal of the internal triode 212 is connected with the power terminal IN, the output terminal of the internal triode 212 is connected with the base of the second triode T2, for controlling the on / off of the second triode T2, and thus controlling the on / off of the first triode T1. The base of the internal triode 212 is inductively connected with the light emitting element 211, for controlling the connection of the input terminal and the output terminal of the internal triode 212 when the light emitting element 211 emits light. The input terminal of the internal triode 212 is the emitter of the triode, and the output terminal of the internal triode 212 is the collector of the triode.
[0047] In the embodiment, the control unit 21 further comprises an inductive circuit 220, which is connected with both ends of the light emitting element 211, for controlling the light emitting element 211 to emit light when the communication bus 10 has a communication bus.
[0048] The communication bus 10 comprises a positive wire and a negative wire.
[0049] The inductive circuit 220 comprises a first inductor L1 and a second inductor L2. The positive wire is connected with the positive terminal of the light emitting element 211 through the first inductor L1, and the negative wire is connected with the negative terminal of the light emitting element 211 through the second inductor L2, for making the light emitting element 211 emit light when the communication bus 10 transmits a communication signal.
[0050] The inductive circuit 220 further comprises a diode D1, which is arranged between the communication bus 10 and the opto-coupler 210. The positive terminal of the diode D1 is connected with the positive wire, and the negative terminal of the diode D1 is connected with the positive terminal of the light emitting element 211, for controlling the signal flow direction between the communication bus 10 and the opto-coupler 210. When the signal of the positive wire flows to the negative wire, the light emitting element 211 emits light, and when the signal reverses or there is no signal, the light emitting element 211 does not emit light.
[0051] The inductive circuit 220 further comprises a third resistor R3, both ends of which are connected with the positive wire and the negative wire of the communication bus 10. The communication bus 10 forms the inductive circuit 220 through the inductors and the third resistor R3. Both ends of the light emitting element 211 are connected with both ends of the third resistor R3, for making the light emitting element 211 emit light when a current is induced to pass through the third resistor R3. Further, the inductive circuit 220 further comprises a first capacitor C1, both ends of which are connected with both ends of the third resistor R3, for forming a feedback loop, which is not limited here.
[0052] Further, the positive and negative lines of the communication bus 10 are respectively provided with capacitors, the capacitors on the communication bus 10 play a role of isolating direct current and passing alternating current, and the communication signals are transmitted to the control chip MUC of the car audio 100 through the capacitors on the communication bus 10 for signal decoding. The wake-up signals on the communication bus 10 are coupled out of the direct current power signal through the first inductor L1 and the second inductor L2, and the direct current power signal is loaded to the light emitting element 211 of the photoelectric coupler 210.
[0053] Further, the positive line is grounded through a capacitor, and the negative line is also grounded through a capacitor, and the capacitors are used for filtering the communication bus 10 to ensure the stability of the output direct current power signal.
[0054] In the embodiment, the power supply end IN transmits a stable voltage of 12V.
[0055] In the embodiment, the communication signals on the communication bus are converted into direct current power signals through the first inductor and the second inductor, and the direct current power signals are loaded to both ends of the light emitting element of the photoelectric coupler, and then the collector and the emitter of the internal triode in the photoelectric coupler are instructed to be turned on. At this time, the power supply signal of the power supply end is output to the second triode through the photoelectric coupler, and then the first triode is controlled to be turned on through the second triode, so that the control circuit outputs the wake-up signal to wake up the entire power amplifier system of the car audio. The wake-up signal is a power supply signal or a power voltage or an enable signal, etc. It should be noted that when the communication bus is used for data transmission, the power supply on the controller 200 will be automatically turned off, and at this time, the power supply on the car audio 100 will not be woken up.
[0056] The application also provides a car audio, which will be described in detail below. Figure 4 , Figure 4 The application provides a structure schematic diagram of an embodiment of the car audio. The car audio 100 comprises the car audio wake-up circuit in any of the above embodiments. Specifically, the car audio 100 comprises the communication bus 10, the control circuit 20, and the control chip MUC for supplying power to the car audio.
[0057] The communication bus 10 is used for receiving the communication signal line transmitted from the outside to the car audio 100. The communication signals transmitted on the communication bus 10 are data signals. The communication signals can be transmitted by the controller, or can be transmitted by other devices.
[0058] The control circuit 20 supplies power to the control chip MUC according to whether there is a communication signal on the communication bus 10, so that the control chip MUC works, and then controls the entire car audio to work, so as to realize the wake-up function.
[0059] The application has the advantages that: the communication signal on the communication bus is sensed by the control circuit, and a wake-up signal is output when the communication signal on the communication bus is sensed, so as to wake up the whole vehicle audio and make the vehicle audio work, and when there is no communication signal on the communication bus, the vehicle audio is kept in a dormant state, so that energy saving is realized. Compared with the prior art which needs to additionally increase a power signal to wake up the circuit, the application realizes the wake-up through the signal on the communication bus, does not occupy an additional signal line bundle, reduces the cost of the line bundle, and thus reduces the development amount of the car machine hardware.
[0060] The above is only the embodiment of the application, and does not limit the patent protection scope of the application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.
Claims
1. An in-vehicle audio wake-up circuit, characterized by comprising: The vehicle-mounted audio awakening circuit comprises: a communication bus for transmitting a communication signal; a control circuit connected with the communication bus for outputting an awakening signal to awaken the vehicle-mounted audio when a communication signal is sensed on the communication bus; the control circuit comprises: a power supply end for providing a power supply signal; a first triode connected with the power supply end, the collector of the first triode being connected with the power supply end, and the emitter of the first triode being connected with the vehicle-mounted audio for controlling the power supply end to provide an awakening signal to the vehicle-mounted audio; a control unit, the input end of the control unit being connected with the communication bus, and the output end of the control unit being connected with the base of the first triode for providing a control signal to the base of the first triode according to the communication signal on the communication bus to control the on / off of the collector and the emitter of the first triode.
2. The car audio awakening circuit according to claim 1, wherein the control unit comprises: an optoelectronic coupler, the optoelectronic coupler comprising a light-emitting element and an internal triode, the two ends of the light-emitting element being connected with the communication bus for emitting light when a communication signal is sensed on the communication bus, and the internal triode being turned on when the light-emitting element emits light to provide a control signal to the base of the first triode.
3. The car audio awakening circuit according to claim 2, wherein the control unit further comprises: a second triode arranged between the output end of the optoelectronic coupler and the base of the first triode, the base of the second triode being connected with the output end of the internal triode of the optoelectronic coupler, the emitter of the second triode being connected with the base of the first triode, and the collector of the second triode being connected with the ground wire; wherein the first triode is a PNP triode, and the second triode is an NPN triode.
4. The car audio awakening circuit according to claim 3, wherein the optoelectronic coupler is further connected with the power supply end, specifically, the input end of the internal triode is connected with the power supply end, and the output end of the internal triode is connected with the base of the second triode to control the on / off of the second triode.
5. The car audio awakening circuit according to claim 2, wherein the control unit further comprises a sensing circuit; the sensing circuit is connected with the two ends of the light-emitting element for controlling the light-emitting element to emit light when a communication signal is sensed on the communication bus.
6. The vehicle-mounted audio awakening circuit according to claim 5, wherein the communication bus comprises a positive wire and a negative wire; the sensing circuit comprises a first inductor and a second inductor; the positive wire is connected with the positive pole of the light-emitting element through the first inductor, and the negative wire is connected with the negative pole of the light-emitting element through the second inductor to make the light-emitting element emit light when a communication signal is transmitted on the communication bus.
7. The vehicle-mounted audio awakening circuit according to claim 6, wherein the sensing circuit further comprises a diode, the diode being arranged between the communication bus and the optoelectronic coupler, the positive pole of the diode being connected with the positive wire, and the negative pole of the diode being connected with the positive pole of the light-emitting element of the optoelectronic coupler for controlling the signal flow direction between the communication bus and the optoelectronic coupler.
8. The vehicle-mounted audio awakening circuit according to claim 7, wherein The inductive circuit further comprises a third resistor, two ends of the third resistor are connected with the positive wire and the negative wire of the communication bus respectively; wherein two ends of the light emitting element are connected with two ends of the third resistor respectively.
9. A car audio, characterized by comprising: The vehicle-mounted audio system comprises the vehicle-mounted audio system wake-up circuit according to any one of claims 1-8.