CN217145878U - Wake-up circuit and vehicle - Google Patents
Wake-up circuit and vehicle Download PDFInfo
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- CN217145878U CN217145878U CN202121044952.5U CN202121044952U CN217145878U CN 217145878 U CN217145878 U CN 217145878U CN 202121044952 U CN202121044952 U CN 202121044952U CN 217145878 U CN217145878 U CN 217145878U
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Abstract
The utility model provides a wake-up circuit and vehicle. The wake-up circuit comprises at least one isolation sub-circuit, and the input end of the isolation sub-circuit receives a preset abrupt change edge and then outputs a preset signal with the duration not exceeding a preset duration; when any one of the isolation sub-circuits outputs the preset signal not exceeding the preset duration, the wake-up circuit outputs a wake-up signal. With the configuration, the wake-up circuit can be used for responding to multiple wake-up source signals and outputting the wake-up signals to activate a controller of the vehicle, and meanwhile, the problem that when one wake-up source signal keeps high level (or low level), the wake-up circuit continuously outputs the wake-up signals, so that the state change of other wake-up sources cannot be responded is solved; the problem of lack among the prior art to the multichannel awakening source signal unified processing and each other not influence the awakening circuit between the way signal is solved.
Description
Technical Field
The utility model relates to a vehicle technical field, in particular to awaken circuit and vehicle up.
Background
In order to reduce power consumption, the automobile controller has two modes of sleep and active. In the sleep mode, the controller only reserves a small part of functions such as communication and the like, and the power consumption is extremely low; when the controller detects a specific signal, it enters active mode to start normal operation, and we generally refer to the specific signal for making the controller enter operating mode from sleep mode as a wake-up signal.
The traditional automobile usually only wakes up the controller through the automobile key signal, and the user inserts the automobile key, and the controller begins to work, pulls out the automobile key, and the controller enters dormancy promptly. But along with the intelligent development of car, the passenger car has more humanized designs, and present intelligent automobile awakens up the source more complicated various, if cell-phone APP long-range awakening, car key long-range awakening, pronunciation awaken up, charge and awaken up etc.. While the number of wake-up pins dedicated to responding to wake-up signals on the chip inside the controller is usually only one to two, the wake-up resources on the controller are very scarce compared to the increasingly complex wake-up requirements. Therefore, it is necessary to isolate the multiple wake-up sources, so that the multiple wake-up sources can be connected to the same wake-up pin to multiplex the wake-up pins.
In addition, when designing the wake-up circuit, the following two problems need to be noted.
1) The wake-up signal is an external input signal, and usually introduces pulse interference with high power, so that high-voltage protection is performed on the wake-up source, which is also an urgent problem to be solved.
2) When a certain path of wake-up signal keeps high level (or low level), the signal of the path cannot influence the response of the wake-up circuit to the wake-up signals of other paths.
In summary, a wake-up circuit that performs a unified processing on multiple wake-up source signals and does not affect each other is lacking in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wake-up circuit and vehicle to solve and lack among the prior art and unify the problem of handling and each other not influencing wake-up circuit between each way signal to multichannel wake-up source signal.
In order to solve the above technical problem, the present invention provides a wake-up circuit, which includes at least one isolation sub-circuit, wherein after receiving a preset abrupt change edge, an input end of the isolation sub-circuit outputs a preset signal with a duration not exceeding a preset duration; when any one of the isolation sub-circuits outputs the preset signal not exceeding the preset duration, the wake-up circuit outputs a wake-up signal.
Optionally, at least one of the isolation sub-circuits is configured as a first sub-circuit, and when an input end of the first sub-circuit receives a rising edge signal, the first sub-circuit outputs a signal higher than a first preset voltage only within a first time period, where the first time period is less than or equal to the preset time period.
Optionally, the first sub-circuit includes a first capacitor, a first resistor, and a second resistor, a first end of the first capacitor is configured to receive the rising edge signal, a second end of the first capacitor is configured to output a signal, the first end of the first capacitor is grounded through the first resistor, and the second end of the first capacitor is grounded through the second resistor.
Optionally, the first sub-circuit further includes a suppression element, and the second terminal of the first capacitor is further grounded through the suppression element; the suppression element is configured to reduce its resistance value to a safe resistance value for a safe response time period when a differential pressure across the suppression element is greater than a safe differential pressure.
Optionally, the first sub-circuit further includes a first diode, a second terminal of the first capacitor is connected to an anode of the first diode, and the second terminal of the first capacitor is configured to output a signal through the first diode.
Optionally, at least one of the isolation sub-circuits is configured as a second sub-circuit, and when an input end of the second sub-circuit receives a falling edge signal, the second sub-circuit outputs a signal lower than a second preset voltage only within a second time period, where the second time period is less than or equal to the preset time period.
Optionally, the second sub-circuit includes a second capacitor, a third resistor, and a fourth resistor, a first end of the second capacitor is configured to receive the falling edge signal, a second end of the second capacitor is configured to output a signal, the first end of the second capacitor is connected to a power supply through the third resistor, and the second end of the second capacitor is connected to the power supply through the fourth resistor.
Optionally, the second sub-circuit further includes a second diode, a first end of the second capacitor is connected to a cathode of the second diode, and an anode of the second diode is grounded.
Optionally, the second sub-circuit further includes a third diode and a fourth diode, an anode of the third diode is connected to the first end of the second capacitor, a cathode of the fourth diode is connected to the second end of the second capacitor, the first end of the second capacitor is configured to receive the falling edge signal through the third diode, and the second end of the second capacitor is configured to output a signal through the fourth diode.
In order to solve the technical problem, the utility model also provides a vehicle, the vehicle includes foretell wake-up circuit and controller, wake-up circuit's output with the wake-up signal input part of controller is connected.
Compared with the prior art, in the wake-up circuit and the vehicle provided by the utility model, the wake-up circuit comprises at least one isolation sub-circuit, and after the input end of the isolation sub-circuit receives the preset abrupt change edge, a preset signal with the output length not exceeding the preset time length is output; when any one of the isolation sub-circuits outputs the preset signal not exceeding the preset duration, the wake-up circuit outputs a wake-up signal. With the configuration, the wake-up circuit can be used for responding to multiple wake-up source signals and outputting the wake-up signals to activate a controller of the vehicle, and meanwhile, the problem that when one wake-up source signal keeps high level (or low level), the wake-up circuit continuously outputs the wake-up signals, so that the state change of other wake-up sources cannot be responded is solved; the problem of lack among the prior art to the multichannel awakening source signal unified processing and each other not influence the awakening circuit between the way signal is solved.
Drawings
Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of a wake-up circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wake-up circuit according to another embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a wake-up circuit according to an embodiment of the present invention.
In the drawings:
1-an isolation sub-circuit; 2-a summary module; 3-a controller;
11-a first sub-circuit; 111-a first capacitor; 112-a first resistance; 113-a second resistance; 114-a suppression element; 115-a first diode;
12-a second sub-circuit; 121-a second capacitor; 122-a third resistance; 123-a fourth resistor; 124-a second diode; 125-a third diode; 126-fourth diode.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that there is a number of technical features being indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as a fixed connection, as a detachable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and is not to be understood as indicating or implying any spatial relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model discloses a core thought lies in providing a wake-up circuit and vehicle to solve and lack among the prior art and carry out the problem of the wake-up circuit that unifies between processing and each way signal each other not influencing to multichannel wake-up source signal.
The following detailed description refers to the accompanying figures 1-3.
Please refer to fig. 1 to 3, wherein fig. 1 is a schematic structural diagram of a wake-up circuit according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a wake-up circuit according to another embodiment of the present invention; fig. 3 is a schematic circuit diagram of a wake-up circuit according to an embodiment of the present invention.
As shown in fig. 1, the present embodiment provides a wake-up circuit, where the wake-up circuit includes at least one isolation sub-circuit 1, and an input end of the isolation sub-circuit 1 receives a preset abrupt change edge and outputs a preset signal not exceeding a preset duration; when any one of the isolation sub-circuits outputs the preset signal, the wake-up circuit outputs a wake-up signal. The preset abrupt change edge is at least one of a rising edge and a falling edge, and the preset abrupt change edge is configured according to the characteristics of the signal output by the wake-up source. It should be understood that the preset abrupt change edge corresponding to each of the isolated sub-circuits 1 may be different.
Further, the number of the isolation subcircuits 1 is adapted to the number of the wake-up sources.
With the configuration, firstly, a plurality of paths of awakening source signals can be summarized, so that the awakening port of the controller 3 is saved, and the expandability is realized, when a new awakening mode is added to the vehicle, the controller 3 of the vehicle can be modified without expanding the number of the isolation sub-circuits 1; secondly, the output signals of the isolation sub-circuit 1 are configured into pulse signals, so that whether the input signals of different isolation sub-circuits 1 meet expectations or not can be distinguished by a subsequent circuit conveniently, and influences among all paths of wake-up source signals are eliminated.
In this embodiment, the output terminal of the isolation sub-circuit 1 is configured as the output terminal of the wake-up circuit and is used for being directly connected to the wake-up port of the controller 3, and the preset signal is also configured as the wake-up signal. In other embodiments, referring to fig. 2, the wake-up circuit may further include a summarizing module 2, an output end of the isolating sub-circuit 1 is connected to the summarizing module 2, and the summarizing module 2 outputs the wake-up signal according to logic inside itself. The specific structure and the working principle of the summarizing module 2 can be set by those skilled in the art according to actual needs, and are not described in detail herein. However, the embodiment shown in fig. 1 is a preferred solution in view of the simplified structure.
Referring to fig. 3, at least one of the isolation sub-circuits 1 is configured as a first sub-circuit 11, and when an input terminal of the first sub-circuit 11 receives a rising edge signal, the first sub-circuit outputs a signal higher than a first preset voltage only within a first time period. At least one isolation sub-circuit 1 is configured as a second sub-circuit 12, and when the input end of the second sub-circuit 12 receives a falling edge signal, the input end outputs a signal lower than a second preset voltage only in a second time period. The first time length is less than or equal to the preset time length, and the second time length is less than or equal to the preset time length. With such a configuration, wake-up sources with different characteristics can be connected to the input end of the corresponding first sub-circuit 11 or the second sub-circuit 12, and are suitable for different application scenarios. The first preset voltage and the second preset voltage are configured according to a wake-up trigger logic of the controller 3. For example, in an embodiment, when the controller 3 receives a rising edge signal greater than or equal to 5V, it wakes up itself, and at this time, the first preset voltage is 5V; when the controller 3 receives a falling edge signal smaller than or equal to 0.1V, it wakes up itself, and at this time, the second preset voltage is 0.1V. The signal higher than the first preset voltage and the signal lower than the second preset voltage are the preset signals.
It is to be understood that in other embodiments, if the overall wake-up scheme of the vehicle includes only one format of wake-up source signal, the wake-up circuit may include only the first sub-circuit 11 or only the second sub-circuit 12. In other embodiments, the specific form of the isolation sub-circuit 1 may not be limited to the form of the first sub-circuit 11 or the second sub-circuit 12.
Referring to fig. 3, the first sub-circuit 11 includes a first capacitor 111, a first resistor 112 and a second resistor 113, a first end of the first capacitor 111 is used for receiving the rising edge signal, a second end of the first capacitor 111 is used for outputting a signal, the first end of the first capacitor 111 is grounded through the first resistor 112, and the second end of the first capacitor 111 is grounded through the second resistor 113.
Taking the V +1 port as an example, when the first sub-circuit 11 is in a steady state, since the first terminal and the second terminal of the first capacitor 111 both perform sufficient charge exchange with the ground, the voltage at both ends of the first capacitor 111 is the voltage of the ground, that is, 0V. If the first sub-circuit 111 receives a high-level active wake-up signal (e.g. a car key signal), since the first capacitor 111 has a characteristic that the voltage difference between two terminals is not changed instantaneously, the voltage at point a (as will be understood with reference to fig. 3) also becomes high, and then the voltage at point a is discharged through the second resistor 113 and returns to 0V, that is, after the first sub-circuit 11 captures the rising edge of the input signal, the input signal is converted into an upward spike, which is input to wake-up pinA, and for pinA, this spike is also an active rising edge signal, so the controller 3 can be woken up. And because the voltage of the pinA point is finally restored to 0V after being discharged through the resistor, the pinA point can continuously respond to the rising edge of other wake-up sources, such as the signal of the V +2 port. The first time period is a time period during which the voltage at the point a changes from the high level to 0V.
Further, the first sub-circuit 11 further includes a suppression element 114, and the second terminal of the first capacitor 111 is further grounded through the suppression element 114; the suppression element 114 is configured to reduce its resistance value to a safe resistance value for a safe response time period when the differential pressure across it is greater than the safe differential pressure. In this embodiment, the suppressing element 114 is a transient suppression diode, and in other embodiments, the suppressing element 114 may also select other elements or circuits with similar functions.
Since the first capacitor 111 acts as a capacitive isolation between the external input V +1 and the controller 3. When a large power pulse is externally input, the pulse is a very narrow peak after passing through the first capacitor 111, and the peak can be absorbed by the suppressor 114 (i.e. transient suppressor diode), thereby protecting the controller 3. The mode of capacitance isolation and transient suppression diode absorption can achieve extremely high-voltage protection level which is more than ten times of the protection capability of the conventional means (such as adding the transient suppression diode at an input port).
In this embodiment, the first sub-circuit 11 further includes a first diode 115, a second terminal of the first capacitor 111 is connected to a positive electrode of the first diode 115, and the second terminal of the first capacitor 111 is configured to output a signal through the first diode 115. Preferably, the first diode 115 is a schottky diode. With such a configuration, the influence of the output signal of other circuits on the output end of the first sub-circuit 11 can be reduced or avoided, and meanwhile, the schottky diode has good response characteristics, can quickly reflect the voltage change of the circuit, and improves the effectiveness of the output signal of the first sub-circuit 11.
Referring to fig. 3, in the present embodiment, the second sub-circuit 12 includes a second capacitor 121, a third resistor 122 and a fourth resistor 123, a first end of the second capacitor 121 is configured to receive the falling edge signal, a second end of the second capacitor 121 is configured to output a signal, the first end of the second capacitor 121 is connected to a power source through the third resistor 122, and the second end of the second capacitor 121 is connected to the power source through the fourth resistor 123.
Taking V-1 as an example, when the second sub-circuit 12 is in a steady state, since the first terminal and the second terminal of the second capacitor 121 are fully charge exchanged with the power supply, the voltage across the second capacitor 111 is the voltage of the power supply, i.e. UBD. If the second sub-circuit 12 receives a low-level active wake-up signal (e.g. a gun-in-gun charging signal), since the second capacitor 121 has a characteristic that the voltage difference between two terminals is not changed instantaneously, the voltage at the point b also becomes low, and then the voltage at the point b is discharged through the fourth resistor 123 and returns to UBD, that is, after the second sub-circuit 12 captures the falling edge of the input signal, the input signal is converted into a downward spike, which is input to wake-up pinB, and for pinB, the spike is also an active falling edge signal, so that the controller 3 can be woken up. And because the voltage at pinB is discharged through the fourth resistor 123 and finally returns to UBD, it can continue to respond to the rising edge of other wake-up sources, such as V-2. And the time length for changing the voltage at the point b from the low level to the UBD is the second time length.
In this embodiment, the second sub-circuit 12 further includes a second diode 124, a first end of the second capacitor 121 is connected to a cathode of the second diode 124, and an anode of the second diode 124 is grounded. The second diode 124 is a freewheeling diode that allows a large current in the forward direction. When a negative high voltage pulse is inputted from the outside, the voltage at the point c is clamped to about 0.7V after the negative voltage passes through the second diode 124, and the internal circuit is not damaged.
Preferably, the second sub-circuit 12 further includes a third diode 125 and a fourth diode 126, an anode of the third diode 125 is connected to the first end of the second capacitor 121, a cathode of the fourth diode 126 is connected to the second end of the second capacitor 121, the first end of the second capacitor 121 is configured to receive the falling edge signal through the third diode 125, and the second end of the second capacitor 121 is configured to output a signal through the fourth diode 126. The third diode 125 is a rectifier diode having a high reverse withstand voltage. The third diode 125 can be used for blocking externally input positive high voltage pulses, and the scheme of combining the third diode 125 and the second diode 124 can effectively block externally input high voltage pulses, so that the high voltage protection level is extremely high, which is more than ten times of the protection capability of a conventional means (such as adding a transient suppression diode at an input port). In this embodiment, the fourth diode 126 is a schottky diode, the fourth diode 126 can reduce or prevent the output end of the second sub-circuit 12 from being affected by the output signals of other circuits, and meanwhile, the schottky diode has a good response characteristic, can quickly reflect the voltage change of the circuit, and improves the effectiveness of the output signal of the second sub-circuit 12.
The embodiment further provides a vehicle, the vehicle includes the above-mentioned wake-up circuit and the controller 3, and the output end of the wake-up circuit is connected with the wake-up signal input end of the controller 3. In this embodiment, referring to fig. 3, the controller 3 has two wake-up signal input terminals, a part of output terminals of the wake-up circuit is connected to one of the wake-up signal input terminals, and another part of output terminals of the wake-up circuit is connected to the other of the wake-up signal input terminals. In other embodiments, the controller 3 may have only one wake-up signal input, and the wake-up circuit is connected to the wake-up signal input through the aggregation module 2.
Other parts of the vehicle and the corresponding connection and working principles can be arranged by those skilled in the art according to the prior art and the actual needs, and will not be described in detail herein.
The vehicle adopts the wake-up circuit, so that the vehicle has the beneficial effects that the multipath wake-up source signals are uniformly processed and the signals are not influenced mutually.
In summary, the present embodiment provides a wake-up circuit and a vehicle. The wake-up circuit comprises at least one isolation sub-circuit 1, and the input end of the isolation sub-circuit 1 outputs a preset signal not exceeding a preset time length after receiving a preset abrupt change edge; when any one of the isolation sub-circuits 1 outputs the preset signal not exceeding the preset duration, the wake-up circuit outputs a wake-up signal. With such a configuration, the wake-up circuit can be used for responding to multiple wake-up source signals and outputting wake-up signals to activate the controller 3 of the vehicle, and meanwhile, the problem that when one of the wake-up source signals keeps high level (or low level), the wake-up circuit continuously outputs the wake-up signals, so that the state change of other wake-up sources cannot be responded is avoided; the problem of lack among the prior art to the multichannel awakening source signal unified processing and each other not influence the awakening circuit between the way signal is solved.
The above description is only for the description of the preferred embodiment of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. A wake-up circuit is characterized by comprising at least one isolation sub-circuit, wherein after an input end of the isolation sub-circuit receives a preset abrupt change edge, a preset signal with the duration not exceeding a preset duration is output; when any one of the isolation sub-circuits outputs the preset signal not exceeding the preset duration, the wake-up circuit outputs a wake-up signal.
2. The wake-up circuit according to claim 1, wherein at least one of the isolation sub-circuits is configured as a first sub-circuit, and when the input terminal of the first sub-circuit receives a rising edge signal, the first sub-circuit outputs a signal higher than a first preset voltage only for a first time period, and the first time period is less than or equal to the preset time period.
3. The wake-up circuit of claim 2, wherein the first sub-circuit comprises a first capacitor, a first resistor and a second resistor, a first end of the first capacitor is configured to receive the rising edge signal, a second end of the first capacitor is configured to output a signal, the first end of the first capacitor is grounded through the first resistor, and the second end of the first capacitor is grounded through the second resistor.
4. The wake-up circuit according to claim 3, wherein the first sub-circuit further comprises a suppression element, the second terminal of the first capacitor further being connected to ground through the suppression element; the suppression element is configured to reduce its resistance value to a safe resistance value for a safe response time period when a differential pressure across the suppression element is greater than a safe differential pressure.
5. The wake-up circuit according to claim 4, wherein the first sub-circuit further comprises a first diode, the second terminal of the first capacitor is connected to the anode of the first diode, and the second terminal of the first capacitor is configured to output a signal through the first diode.
6. The wake-up circuit according to claim 1, wherein at least one of the isolation sub-circuits is configured as a second sub-circuit, and when the input terminal of the second sub-circuit receives a falling edge signal, the second sub-circuit outputs a signal lower than a second preset voltage only for a second duration, and the second duration is less than or equal to the preset duration.
7. The wake-up circuit of claim 6, wherein the second sub-circuit comprises a second capacitor, a third resistor and a fourth resistor, a first terminal of the second capacitor is configured to receive the falling edge signal, a second terminal of the second capacitor is configured to output a signal, the first terminal of the second capacitor is connected to a power source through the third resistor, and the second terminal of the second capacitor is connected to the power source through the fourth resistor.
8. The wake-up circuit of claim 7, wherein the second sub-circuit further comprises a second diode, wherein a first terminal of the second capacitor is connected to a cathode of the second diode, and wherein an anode of the second diode is connected to ground.
9. The wake-up circuit of claim 8, wherein the second sub-circuit further comprises a third diode and a fourth diode, an anode of the third diode is connected to the first terminal of the second capacitor, a cathode of the fourth diode is connected to the second terminal of the second capacitor, the first terminal of the second capacitor is configured to receive the falling edge signal through the third diode, and the second terminal of the second capacitor is configured to output a signal through the fourth diode.
10. A vehicle comprising a wake-up circuit as claimed in any one of claims 1 to 9 and a controller, an output of the wake-up circuit being connected to a wake-up signal input of the controller.
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| CN202121044952.5U CN217145878U (en) | 2021-05-14 | 2021-05-14 | Wake-up circuit and vehicle |
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| CN202121044952.5U CN217145878U (en) | 2021-05-14 | 2021-05-14 | Wake-up circuit and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117048371A (en) * | 2023-10-13 | 2023-11-14 | 万帮数字能源股份有限公司 | New energy automobile charging awakening system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117048371A (en) * | 2023-10-13 | 2023-11-14 | 万帮数字能源股份有限公司 | New energy automobile charging awakening system and method |
| CN117048371B (en) * | 2023-10-13 | 2023-12-15 | 万帮数字能源股份有限公司 | New energy automobile charging awakening system and method |
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