CN216684355U - Startup and shutdown control circuit and electric automobile - Google Patents
Startup and shutdown control circuit and electric automobile Download PDFInfo
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- CN216684355U CN216684355U CN202123235284.7U CN202123235284U CN216684355U CN 216684355 U CN216684355 U CN 216684355U CN 202123235284 U CN202123235284 U CN 202123235284U CN 216684355 U CN216684355 U CN 216684355U
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Abstract
The utility model discloses a startup and shutdown control circuit and an electric automobile, wherein the startup and shutdown control circuit comprises: the detection end of the signal detection control circuit is connected with the vehicle door horn, and the signal detection control circuit is used for detecting the type of an electric signal output by the vehicle door horn and outputting a corresponding control signal according to the type of the electric signal; switch circuit, switch circuit's input is connected with power supply, switch circuit's output with car power amplifier's feed end is connected, switch circuit's controlled end with signal detection control circuit's output is connected, switch circuit is used for receiving switch on during the control signal, and will the electric energy output of power supply output to car power amplifier, with the drive car power amplifier work. The utility model can solve the problem of inconvenient on-off control of the automobile power amplifier.
Description
Technical Field
The utility model relates to the technical field of automobile control, in particular to a startup and shutdown control circuit and an electric automobile.
Background
When the car owner wants to add power amplifier and loudspeaker on the basis of former car stereo set, traditional repacking mode is: the sound source of the automobile console, such as the vehicle-mounted CD player, is provided with a REMOTE interface, and the interface is connected to the REMOTE interface of the added automobile power amplifier by a wire. The power amplifier of the automobile is controlled to be turned on or turned off by the high or low level of the interface REMOTE. When the vehicle-mounted CD player is started, the REMOTE interface is at a high level to trigger the automobile power amplifier to be started, otherwise, when the vehicle-mounted CD player is shut down, the REMOTE interface is at a low level to trigger the automobile power amplifier to be closed. The automobile power amplifier that adds usually installs in vapour car trunk, just needs to connect a wire to connect the trunk from the on-vehicle CD of car center console this moment, controls the automobile power amplifier through this wire and opens or close. However, installing the wires requires removing the vehicle-mounted CD from the center console, introducing the wires from the back, and then routing the wires to the back box, which is time consuming and labor intensive in the retrofitting process.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a power on/off control circuit, aiming at solving the problem of inconvenience in controlling the power on/off of an automobile power amplifier.
In order to achieve the above object, the power on/off control circuit provided by the present invention is applied to an electric vehicle, wherein the vehicle comprises a door speaker, a vehicle-mounted CD player and a vehicle power amplifier, and the power on/off control circuit comprises:
the detection end of the signal detection control circuit is connected with the vehicle door horn, and the signal detection control circuit is used for detecting the type of the electric signal output by the vehicle door horn and outputting a corresponding control signal according to the type of the electric signal;
switch circuit, switch circuit's input is connected with power supply, switch circuit's output with car power amplifier's feed end is connected, switch circuit's controlled end with signal detection control circuit's output is connected, switch circuit is used for receiving switch on during the control signal, and will the electric energy output of power supply output to car power amplifier, with the drive car power amplifier work.
Optionally, the signal detection control circuit includes:
first detection control circuit, first detection control circuit's sense terminal with door loudspeaker connects, first detection control circuit's output with switch circuit's controlled end is connected, first detection control circuit is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication is direct current signal, will direct current signal output extremely switch circuit, in order to control switch circuit switches on.
Optionally, the signal detection control circuit further includes:
the second detects control circuit, the second detect control circuit's sense terminal with door loudspeaker connects, the second detect control circuit's output with switch circuit's controlled end is connected, the second detects control circuit and is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication is alternating current signal, will alternating current signal converts and exports behind the direct current signal extremely switch circuit, in order to control switch circuit switches on.
Optionally, the second detection control circuit includes:
the input end of the first amplifying circuit is connected with the vehicle door horn, and the first amplifying circuit is used for amplifying the voltage output by the vehicle door horn;
the input end of the rectifying circuit is connected with the output end of the first amplifying circuit, and the rectifying circuit is used for rectifying the voltage output by the first amplifying circuit and outputting direct-current voltage;
and the input end of the second amplifying circuit is connected with the output end of the rectifying circuit, the output end of the second amplifying circuit is connected with the controlled end of the switching circuit, and the second amplifying circuit is used for amplifying the direct-current voltage output by the rectifying circuit.
Optionally, the second detection control circuit further includes:
the input end of the third amplifying circuit is connected with the output end of the rectifying circuit, and the third amplifying circuit is used for amplifying the direct-current voltage output by the rectifying circuit;
the energy storage circuit is arranged between the output end of the third amplifying circuit and the input end of the second amplifying circuit, and the energy storage circuit is used for discharging to maintain the voltage of the input end of the second amplifying circuit when the input end of the second amplifying circuit is detected to be powered down.
Optionally, the first amplifying circuit includes a first resistor, a second resistor, a third resistor, a first operational amplifier, and a second operational amplifier; the negative electrode input end of the first operational amplifier is connected with the vehicle door horn, the positive electrode input end of the first operational amplifier is connected with the power supply, the output end of the first operational amplifier is connected with the input end of the rectifying circuit, the negative electrode input end of the second operational amplifier is connected with the vehicle door horn, the positive input end of the second operational amplifier is connected with the positive input end of the first operational amplifier, the output end of the second operational amplifier is connected with the negative input end of the first operational amplifier through the second resistor, the first resistor is arranged between the negative input end of the first operational amplifier and the output end of the first operational amplifier in series, the third resistor is arranged between the negative electrode input end of the second operational amplifier and the output end of the second operational amplifier in series.
Optionally, the second amplifying circuit includes a third operational amplifier, a negative input end of the third operational amplifier is connected to the power supply, a positive input end of the third operational amplifier is connected to the output end of the rectifying circuit, and an output end of the third operational amplifier is connected to the controlled end of the switching circuit.
Optionally, the first operational amplifier, the second operational amplifier and the third operational amplifier are integrated in the same chip.
Optionally, the power on/off control circuit further includes:
the gating switch circuit is provided with a first input end, a second input end, a third input end and an output end, the first input end of the gating switch circuit is connected with the first output end of the signal detection control circuit, the second input end of the gating switch circuit is connected with the second output end of the signal detection control circuit, the third input end of the gating switch circuit is connected with the vehicle-mounted CD player, and the output end of the gating switch circuit is connected with the controlled end of the switch circuit; the gating switch circuit is used for controlling the first output end of the signal detection control circuit to be communicated with the switch circuit, or controlling the second output end of the signal detection control circuit to be communicated with the switch circuit, or controlling the vehicle-mounted CD player to be communicated with the switch circuit.
The utility model further provides an electric automobile which comprises the switch control circuit.
According to the technical scheme, the signal detection control circuit and the switch circuit are arranged, the signal detection control circuit can control the switch circuit to be conducted by detecting the type of the electric signal output by the car door horn and outputting a corresponding control signal according to the type of the electric signal, so that the electric energy output by the power supply is controlled to be output to the car power amplifier to drive the car power amplifier to work; the utility model solves the problem of inconvenient on-off control of the power amplifier of the automobile by arranging the signal detection control circuit and the switch circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of an embodiment of a switching control circuit according to the present invention;
FIG. 2 is a functional block diagram of an embodiment of a power on/off control circuit according to the present invention;
FIG. 3 is a functional block diagram of an embodiment of a second detection control circuit in the power on/off control circuit according to the present invention;
fig. 4 is a schematic circuit diagram of an embodiment of the power on/off control circuit of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a startup and shutdown control circuit which is applied to an electric automobile, wherein the automobile comprises an automobile door loudspeaker, an automobile-mounted CD player and an automobile power amplifier.
At present, when a car owner wants to add a power amplifier and a loudspeaker on the basis of an original car audio, the commonly added car power amplifier is installed in a car trunk, at the moment, a wire is connected to the trunk from a car-mounted CD of a car center console, and the car power amplifier is controlled to be opened or closed through the wire. However, installing the wires requires removing the vehicle-mounted CD from the center console, introducing the wires from the back, and then routing the wires to the back box, which is time consuming and labor intensive in the retrofitting process.
To solve the above problem, referring to fig. 1 to 4, in an embodiment, the power on/off control circuit includes:
the detection end of the signal detection control circuit 10 is connected with the vehicle door horn, and the signal detection control circuit 10 is used for detecting the type of an electric signal output by the vehicle door horn and outputting a corresponding control signal according to the type of the electric signal;
When the vehicle-mounted CD player is started, the anode and the cathode of the door horn both output electric signals, and the types of the electric signals output by the anode and the cathode of the door horn depend on a chip applied by the vehicle-mounted CD player. For example, when the on-board CD player uses a BTL bridge output, the positive and negative poles of the door speaker of the on-board CD player will both output a dc voltage and an ac voltage when the door speaker is turned on. When the vehicle-mounted CD player adopts OTL single-end output, the anode of the door horn can output alternating voltage, and the cathode is 0V.
In this embodiment, a signal detection control circuit 10 is provided for detecting the type of the electrical signal output by the door speaker, and converting the electrical signal output by the door speaker into a corresponding control signal, i.e., outputting a dc high level signal, so as to control the switching circuit 20 to be turned on, so that the switching circuit 20 outputs the electrical energy output by the power supply to the car power amplifier, so as to drive the car power amplifier to operate. The signal detection control circuit 10 may select a plurality of resistors to form a high-level dc detection resistor, and output the dc voltage output by the door horn to the switch circuit 20 after the dc voltage is mixed by the resistors, so as to control the switch circuit 20 to be turned on. The signal detection control circuit 10 may also be implemented by a comparison circuit, a filter circuit, etc., so as to convert an ac signal output by the door speaker into a dc signal and output the dc signal to the switch circuit 20, so as to control the switch circuit 20 to be turned on. The switch circuit 20 may be formed by a resistor, a transistor, etc., and specifically, as shown in fig. 4, when the switch circuit 20 receives the dc high level signal output by the signal detection control circuit 10, the transistor is turned on, so that the power supply is electrically connected to the car power amplifier to drive the car power amplifier to work. Thus, when the vehicle-mounted CD player is turned on, the signal detection control circuit 10 can control the on/off of the switch circuit 20 by detecting and acquiring the dc potential and the ac signal on the door speaker, thereby controlling the turning on/off of the car power amplifier. It can be understood that, when on-vehicle CD stop work, just also there is not the signal of telecommunication output on the door loudspeaker, switch circuit 20 cuts off this moment, power supply stops to the power supply of car power amplifier, thereby make car power amplifier stop work, so, through setting up signal detection control circuit 10 and switch circuit 20, the automatic start and shutdown function of car power amplifier has been realized, only need add signal detection control circuit 10 in the door loudspeaker outside, the change to former car stereo set has been reduced, repacking efficiency has been improved.
According to the utility model, by arranging the signal detection control circuit 10 and the switch circuit 20, the signal detection control circuit 10 can detect the direct current potential and the alternating current signal on the door horn and output a control signal to control the conduction of the switch circuit 20, so that the electric energy output by the power supply is controlled to be output to the automobile power amplifier to drive the automobile power amplifier to work. The utility model realizes the automatic start-up and shut-down functions of the automobile power amplifier by arranging the signal detection control circuit 10 and the switch circuit 20, improves the convenience and reliability of using the automobile power amplifier, reduces the change of the original automobile sound equipment during modification and improves the modification efficiency.
Referring to fig. 1 to 4, in an embodiment, the signal detection control circuit 10 includes:
first detection control circuit 11, first detection control circuit 11's sense terminal with door loudspeaker connects, first detection control circuit 11's output with switch circuit 20's controlled end is connected, first detection control circuit 11 is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication was direct current signal, will direct current signal output extremely switch circuit 20, in order to control switch circuit 20 switches on.
In this embodiment, the signal detection control circuit 10 includes a first detection control circuit 11, and the first detection control circuit 11 may select a plurality of resistors to form a high-level dc detection resistor, and outputs the dc voltage output by the door horn to the switch circuit 20 after being mixed by the resistors, so as to control the switch circuit 20 to be turned on. The first detection control circuit 11 can be specifically shown in fig. 4, wherein the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 are isolation diodes for isolating the ac signals output from the positive pole and the negative pole of the door speaker to prevent signal crosstalk. Specifically, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14 and the fifteenth resistor R15 constitute a high-level dc detection resistor, and are configured to mix the dc signals output by the door speakers and output the mixed dc signals to the switch circuit 20, so as to control the switch circuit 20 to be turned on, and thus control the electric energy output by the power supply to be output to the car power amplifier, so as to drive the car power amplifier to work.
Referring to fig. 1 to 4, in an embodiment, the signal detection control circuit 10 further includes:
second detection control circuit 12, second detection control circuit 12's sense terminal with door loudspeaker connects, second detection control circuit 12's output with switch circuit 20's controlled end is connected, second detection control circuit 12 is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication was alternating current signal, will alternating current signal converts and exports behind the direct current signal to switch circuit 20, in order to control switch circuit 20 switches on.
In this embodiment, the signal detection control circuit 10 further includes a second detection control circuit 12, and the second detection control circuit 12 may be implemented by a comparator circuit, a rectifying and filtering circuit, or the like. The second detection control circuit 12 may also select a plurality of resistor sets to detect the ac signal, specifically as shown in fig. 4, the ac signal is detected by the ac signal detection resistor and then output to the comparator circuit for comparison, and the comparator circuit outputs to the rectification filter circuit after comparison, so that the rectification filter circuit rectifies the ac signal into the dc signal and outputs the dc signal to the switch circuit 20 to control the switch circuit 20 to be switched on, thereby controlling the electric energy output by the power supply to be output to the car power amplifier to drive the car power amplifier to work.
Referring to fig. 1 to 4, in an embodiment, the second detection control circuit 12 includes:
the input end of the first amplifying circuit 121 is connected to the door horn, and the first amplifying circuit 121 is configured to amplify the voltage output by the door horn;
a rectifying circuit 122, an input end of the rectifying circuit 122 is connected to an output end of the first amplifying circuit 121, and the rectifying circuit 122 is configured to rectify the voltage output by the first amplifying circuit 121 and output a direct-current voltage;
an input end of the second amplifying circuit 123 is connected to an output end of the rectifying circuit 122, an output end of the second amplifying circuit 123 is connected to a controlled end of the switching circuit 20, and the second amplifying circuit 123 is configured to amplify the dc voltage output by the rectifying circuit 122.
In the present embodiment, the second detection control circuit 12 may be divided into a first amplification circuit 121, a second amplification circuit 123, and a rectification circuit 122. The first amplifier circuit 121 and the second amplifier circuit 123 may be implemented by operational amplifiers, and the first amplifier circuit 121 is configured to amplify the ac signal output by the door horn and output the amplified ac signal to the rectifier circuit 122. The rectifying circuit 122 may be formed by an electric component such as a resistor, a capacitor, and a diode, and the rectifying circuit 122 may rectify the ac signal output by the first amplifying circuit 121 into a dc signal, and output the dc signal to the switching circuit 20 after the second amplifying circuit 123 performs amplification processing again, so that the switching circuit 20 is turned on. This embodiment is through setting up first amplifier circuit 121, second amplifier circuit 123 and rectifier circuit 122 for the second detects control circuit 12 and can be converted the alternating current signal of door loudspeaker output into direct current signal, thereby realizes the control to switching circuit 20, and then realizes the on-off control of automobile power amplifier.
Referring to fig. 1 to 4, in an embodiment, the second detection control circuit 12 further includes:
a third amplifying circuit 124, an input end of the third amplifying circuit 124 is connected to an output end of the rectifying circuit 122, and the third amplifying circuit 124 is configured to amplify the dc voltage output by the rectifying circuit 122;
a tank circuit 125, where the tank circuit 125 is disposed between the output terminal of the third amplifying circuit 124 and the input terminal of the second amplifying circuit 123, and the tank circuit 125 is configured to discharge to maintain the voltage at the input terminal of the second amplifying circuit 123 when detecting that the input terminal of the second amplifying circuit 123 is powered down.
In this embodiment, the second detection control circuit 12 may further include an energy storage circuit 125, the energy storage circuit 125 may be formed by an energy storage capacitor and a resistor, and the energy storage circuit 125 may store a certain electric energy, so that when the user pauses to play the CD, the energy storage circuit 125 may output the stored electric energy to the switch circuit 20 through the second amplifying circuit 123, thereby maintaining the on-state of the switch circuit 20, avoiding the auto-shutdown of the car power amplifier when the user pauses to play the CD, and implementing the function of the car power amplifier. It is understood that the on-time maintained by the energy storage circuit 125 is related to the amount of the electric energy stored in the capacitor, so that the on-time maintained by the energy storage circuit 125 can be adjusted by adjusting the size of the energy storage capacitor. A third amplifying circuit 124 can be further disposed between the rectifying circuit 122 and the energy storage circuit 125, and the third amplifying circuit 124 is configured to amplify the electrical signal output by the rectifying circuit 122, so that the voltage is charged to the energy storage circuit 125 sufficiently, and reliability and stability of the delay function are improved.
Referring to fig. 1 to 4, in an embodiment, the first amplifying circuit 121 includes a first resistor R1, a second resistor R2, a third resistor R3, a first operational amplifier U1 and a second operational amplifier U2; the negative input end of the first operational amplifier U1 is connected with the door horn, the positive input end of the first operational amplifier U1 is connected with the power supply, the output terminal of the first operational amplifier U1 is connected to the input terminal of the rectifying circuit 122, the negative input end of the second operational amplifier U2 is connected with the door horn, the positive input end of the second operational amplifier U2 is connected with the positive input end of the first operational amplifier U1, the output end of the second operational amplifier U2 is connected with the negative input end of the first operational amplifier U1 through the second resistor R2, the first resistor R1 is serially connected between the negative input terminal of the first operational amplifier U1 and the output terminal of the first operational amplifier U1, the third resistor R3 is serially connected between the negative input terminal of the second operational amplifier U2 and the output terminal of the second operational amplifier U2.
In the present embodiment, the first amplifying circuit 121 includes a first operational amplifier and a second operational amplifier, as shown in fig. 4. When the vehicle-mounted CD player adopts BTL bridging output, after the vehicle-mounted CD player is started, the positive pole on the door horn can output positive half-cycle alternating voltage, and the negative pole on the door horn can output negative half-cycle alternating voltage. And the negative electrode input end of the first operational amplifier U1 is connected with the negative electrode of the door horn and is used for amplifying the negative half-cycle alternating-current voltage output by the negative electrode of the door horn. And the negative electrode input end of the second operational amplifier U2 is connected with the positive electrode of the door horn and is used for amplifying the positive half-cycle alternating voltage output by the positive electrode of the door horn. The first operational amplifier U1 and the second operational amplifier U2 amplify the ac signals output by the positive and negative electrodes of the door horn and output the amplified ac signals to the rectifier circuit 122, so that the rectifier circuit 122 rectifies the ac signals into dc signals and outputs the dc signals to the switch circuit 20, thereby turning on the switch circuit 20 to control the power on of the car power amplifier.
Referring to fig. 1 to 4, in an embodiment, the second amplifying circuit 123 includes a third operational amplifier U3, a negative input terminal of the third operational amplifier U3 is connected to the power supply, a positive input terminal of the third operational amplifier U3 is connected to the output terminal of the rectifying circuit 122, and an output terminal of the third operational amplifier U3 is connected to the controlled terminal of the switching circuit 20.
Further, the first operational amplifier U1, the second operational amplifier U2 and the third operational amplifier U3 are integrated in the same chip.
In the embodiment, the second amplifying circuit 123 includes a third operational amplifier U3, and the first operational amplifier U1, the second operational amplifier U2 and the third operational amplifier U3 may be integrated in the same chip. In this embodiment, an operational amplifier chip with a model LM324 may be selected, in which pins 5, 6, and 7 of the LM324 constitute a first operational amplifier U1, pins 8, 9, and 10 of the LM324 constitute a second operational amplifier U2, and pins 12, 13, and 14 of the LM324 constitute a third operational amplifier U3. In addition, the pins 1, 2, and 3 of the LM324 may form a fourth operational amplifier U4 in the third amplifying circuit 124, the pin 4 of the LM324 is a power supply terminal, and the pin 11 of the LM324 is a ground terminal, that is, the second signal detection control circuit 10 may select an operational amplifier chip with the model of the LM324 as a comparator, and a rectifying circuit 122 is added to implement the function of converting an ac signal into a dc signal.
Referring to fig. 1 to 4, in an embodiment, the power on/off control circuit further includes:
the gating switch circuit 20 is provided with a first input end, a second input end, a third input end and an output end, the first input end of the gating switch circuit 20 is connected with the first output end of the signal detection control circuit 10, the second input end of the gating switch circuit 20 is connected with the second output end of the signal detection control circuit 10, the third input end of the gating switch circuit 20 is connected with the vehicle-mounted CD player, and the output end of the gating switch circuit 20 is connected with the controlled end of the switch circuit 20; the gate switch circuit 20 is used for controlling the first output end of the signal detection control circuit 10 to be communicated with the switch circuit 20, or controlling the second output end of the signal detection control circuit 10 to be communicated with the switch circuit 20, or controlling the on-vehicle CD player to be communicated with the switch circuit 20.
In this embodiment, the gating switch circuit 20 may be implemented by a single-pole-three-throw switch or other switch circuits 20, and the gating switch circuit 20 may gate different branches, so as to select different car power amplifier control modes. Specifically, three selection terminals of the gate switch circuit 20 are respectively connected to the first detection control circuit 11, the second detection control circuit 12 and the REMOTE interface of the on-board CD player, for example, when the on-board CD player uses a BTL bridge output, the positive electrode and the negative electrode of the on-board CD player on the rear door horn both output a dc voltage and an ac voltage, and at this time, the gate switch can selectively connect the first detection control circuit 11 or the second detection control circuit 12. When the on-vehicle CD player adopts OTL single-ended output, the positive pole of the door loudspeaker can output alternating voltage, the negative pole is 0V, and the gating switch can be selectively communicated with the second detection control circuit 12 at the moment. Meanwhile, the third input terminal of the gating switch circuit 20 is connected with the REMOTE interface of the vehicle-mounted CD player, and the traditional mounting method is reserved, so that a user can select a switch gear according to actual requirements during mounting, and only one or two gears can be reserved during mounting, thereby improving the selectivity of the user.
The utility model further provides an electric vehicle, which includes the switch control circuit, and the specific structure of the switch control circuit refers to the above embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a switch on/off control circuit, is applied to electric automobile, the car includes door loudspeaker, on-vehicle CD machine and car power amplifier, its characterized in that, switch on/off control circuit includes:
the detection end of the signal detection control circuit is connected with the vehicle door horn, and the signal detection control circuit is used for detecting the type of an electric signal output by the vehicle door horn and outputting a corresponding control signal according to the type of the electric signal;
switch circuit, switch circuit's input is connected with power supply, switch circuit's output with car power amplifier's feed end is connected, switch circuit's controlled end with signal detection control circuit's output is connected, switch circuit is used for receiving switch on during the control signal, and will the electric energy output of power supply output to car power amplifier, with the drive car power amplifier work.
2. The switching control circuit according to claim 1, wherein the signal detection control circuit comprises:
first detection control circuit, first detection control circuit's sense terminal with door loudspeaker connects, first detection control circuit's output with switch circuit's controlled end is connected, first detection control circuit is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication is direct current signal, will direct current signal output extremely switch circuit, in order to control switch circuit switches on.
3. The switching control circuit of claim 1, wherein the signal detection control circuit further comprises:
the second detects control circuit, the second detect control circuit's sense terminal with door loudspeaker connects, the second detect control circuit's output with switch circuit's controlled end is connected, the second detects control circuit and is used for detecting the signal of telecommunication of door loudspeaker output, and when the signal of telecommunication was alternating current signal, will alternating current signal converts and exports behind the direct current signal extremely switch circuit, in order to control switch circuit switches on.
4. The switching control circuit according to claim 3, wherein the second detection control circuit comprises:
the input end of the first amplifying circuit is connected with the car door horn, and the first amplifying circuit is used for amplifying the voltage output by the car door horn;
the input end of the rectifying circuit is connected with the output end of the first amplifying circuit, and the rectifying circuit is used for rectifying the voltage output by the first amplifying circuit and outputting direct-current voltage;
and the input end of the second amplifying circuit is connected with the output end of the rectifying circuit, the output end of the second amplifying circuit is connected with the controlled end of the switching circuit, and the second amplifying circuit is used for amplifying the direct-current voltage output by the rectifying circuit.
5. The power on/off control circuit of claim 4, wherein the second detection control circuit further comprises:
the input end of the third amplifying circuit is connected with the output end of the rectifying circuit, and the third amplifying circuit is used for amplifying the direct-current voltage output by the rectifying circuit;
the energy storage circuit is arranged between the output end of the third amplifying circuit and the input end of the second amplifying circuit, and the energy storage circuit is used for discharging to maintain the voltage of the input end of the second amplifying circuit when the input end of the second amplifying circuit is detected to be powered down.
6. The power on/off control circuit as claimed in claim 5, wherein the first amplifying circuit comprises a first resistor, a second resistor, a third resistor, a first operational amplifier and a second operational amplifier; the negative electrode input end of the first operational amplifier is connected with the vehicle door horn, the positive electrode input end of the first operational amplifier is connected with the power supply, the output end of the first operational amplifier is connected with the input end of the rectifying circuit, the negative electrode input end of the second operational amplifier is connected with the vehicle door horn, the positive input end of the second operational amplifier is connected with the positive input end of the first operational amplifier, the output end of the second operational amplifier is connected with the negative input end of the first operational amplifier through the second resistor, the first resistor is arranged between the negative input end of the first operational amplifier and the output end of the first operational amplifier in series, the third resistor is arranged between the negative input end of the second operational amplifier and the output end of the second operational amplifier in series.
7. The on-off control circuit according to claim 6, wherein the second amplifying circuit comprises a third operational amplifier, a negative input terminal of the third operational amplifier is connected to the power supply, a positive input terminal of the third operational amplifier is connected to the output terminal of the rectifying circuit, and an output terminal of the third operational amplifier is connected to the controlled terminal of the switching circuit.
8. The power on/off control circuit of claim 7, wherein the first operational amplifier, the second operational amplifier and the third operational amplifier are integrated in a same chip.
9. The switching control circuit according to claim 1, wherein the switching control circuit further comprises:
the gating switch circuit is provided with a first input end, a second input end, a third input end and an output end, the first input end of the gating switch circuit is connected with the first output end of the signal detection control circuit, the second input end of the gating switch circuit is connected with the second output end of the signal detection control circuit, the third input end of the gating switch circuit is connected with the vehicle-mounted CD player, and the output end of the gating switch circuit is connected with the controlled end of the switch circuit; the gating switch circuit is used for controlling the first output end of the signal detection control circuit to be communicated with the switch circuit, or controlling the second output end of the signal detection control circuit to be communicated with the switch circuit, or controlling the vehicle-mounted CD player to be communicated with the switch circuit.
10. An electric vehicle characterized by comprising the on-off control circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123235284.7U CN216684355U (en) | 2021-12-20 | 2021-12-20 | Startup and shutdown control circuit and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123235284.7U CN216684355U (en) | 2021-12-20 | 2021-12-20 | Startup and shutdown control circuit and electric automobile |
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| CN216684355U true CN216684355U (en) | 2022-06-07 |
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| CN202123235284.7U Active CN216684355U (en) | 2021-12-20 | 2021-12-20 | Startup and shutdown control circuit and electric automobile |
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| CN (1) | CN216684355U (en) |
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