CN221058176U - Power supply circuit, power supply device and unmanned equipment - Google Patents

Abstract

The embodiment of the utility model discloses a power supply circuit, a power supply device and unmanned equipment. The power input port is used for being connected with a power supply; the at least two power output ports are used for being respectively connected with the sensors; the key control circuit responds to key operation and outputs a key signal; the first switch circuit responds to the key signal to execute a conducting operation; the at least two second switching circuits perform a turn-on operation in response to a control signal of the controller to turn on the power input port and the power output port. The embodiment of the utility model provides a power circuit and a device thereof, which can power down a controller MCU when unmanned equipment is shut down, so that the unmanned equipment is in an ultralow power consumption state, and the waste of electric energy resources is reduced.

Description

Power supply circuit, power supply device and unmanned equipment

Technical Field

The utility model relates to the technical field of automatic driving, in particular to a power supply circuit, a power supply device and unmanned equipment.

Background

With the high-speed development of the 5G technology and the Internet of things technology, the development of unmanned technology is faster and faster, and at present, the functions of automatic driving automobiles such as automatic parking, highway cruising control, automatic emergency braking and the like are realized by means of sensors to a great extent. The unmanned equipment adopts various sensors, including industrial cameras, laser radars, millimeter wave radars, reversing radar nuclear integrated navigation and the like, and the sensors are various in variety and quantity, and the information of the different sensors is combined together to sense the surrounding environment more accurately.

The inventors of the present utility model found in the course of implementing the present utility model that: the existing sensors and the computing unit are directly connected to the automobile storage battery, all the sensors are used for controlling power on and power off by opening and closing the mechanical switch, and before the mechanical switch is opened, the controller MCU in the circuit is in a power-on state, so that serious waste of electric energy is caused when the unmanned equipment is shut down.

Disclosure of utility model

The embodiment of the utility model aims to provide a power circuit, a power device and unmanned equipment, which can power down a controller MCU in the power circuit when the unmanned equipment is powered off, so that the unmanned equipment is in a low-power consumption state, and the waste of electric energy resources is reduced.

In order to solve the technical problems, the first technical scheme adopted by the utility model is as follows: a power supply circuit is provided, which comprises a power supply input port, at least two power supply output ports, a controller, a key control circuit, a voltage conversion circuit, a first switch circuit and at least two second switch circuits. The power input port is used for connecting a power supply; the at least two power output ports are used for being respectively connected with the sensor to supply power for the sensor; the key detection circuit is configured to respond to key operation and output a key signal; the first switch circuit and the voltage conversion circuit are sequentially connected between the power input port and the controller, the voltage conversion circuit is configured to convert a power supply voltage into a power supply voltage of the controller, the first switch circuit is configured to perform a conduction operation in response to a control signal output by the controller, and to perform a conduction operation in response to the key signal; the number of the at least two second switch circuits is the same as the number of the at least two power output ports, and the second switch circuits are connected between the power input ports and the power output ports and are configured to perform a turn-on operation in response to a control signal of the controller so as to turn on the power input ports and the power output ports.

In an embodiment of the present application, the first switching circuit includes: logic OR gate circuit, triode and MOS pipe. The logic OR gate circuit is respectively connected with the controller, the key control circuit and the triode; the triode is also connected between the MOS tube and the ground; the MOS tube is also connected between the power input port and the voltage conversion circuit.

In an embodiment of the present application, the logic or gate includes a first diode and a second diode. The first diode is connected between the controller and the first end of the triode; the second diode is connected between the key control circuit and the first end of the triode.

In an embodiment of the present application, the key control circuit includes: and a key switch. The key switch is respectively connected with the power input port and the second diode.

In an embodiment of the present application, the power supply circuit further includes a key detection circuit. The key detection circuit comprises a first resistor and a second resistor, wherein the first end of the first resistor is connected with the key control circuit, the second end of the first resistor is respectively connected with the first end of the second resistor and the controller, and the second end of the second resistor is grounded.

In an embodiment of the present application, the power supply circuit further includes: temperature detection circuit, voltage detection circuit, current detection circuit, prevent surge circuit and filter circuit. The above circuits combine to form a circuit protection mechanism that avoids surge currents, surge voltages, and other disturbances.

In order to solve the technical problems, the utility model adopts another technical scheme that: providing a power supply device comprising a power supply circuit as described above and a housing; the power supply circuit is accommodated in the shell, the shell comprises at least two external ports, and the external ports are respectively connected with the power supply input port and the power supply output port of the power supply circuit.

In order to solve the technical problems, the utility model adopts a further technical scheme that: there is provided an unmanned apparatus comprising a power supply device as described above.

The embodiment of the utility model has the beneficial effects that: different from the situation of the prior art, the embodiment of the utility model provides a power supply circuit, which comprises a power supply input port, at least two power supply output ports, a controller, a key control circuit, a voltage conversion circuit, a first switch circuit and at least two second switch circuits, wherein the power supply input port is used for being connected with a power supply, and the at least two power supply output ports are used for being respectively connected with a sensor so as to supply power for the sensor. The key control circuit is configured to output a key signal in response to a key operation, the first switch circuit and the voltage conversion circuit are sequentially connected between the power input port and the controller, the voltage conversion circuit is configured to convert a power supply voltage into a power supply voltage of the controller, the first switch circuit is configured to perform a conducting operation in response to a control signal output by the controller, and to perform a conducting operation in response to the key signal. The second switching circuit is connected between the power input port and the power output port and is configured to perform a turn-on operation in response to a control signal of the controller.

In the embodiment of the application, the first switch circuit can perform the conduction operation in response to the control signal output by the controller and perform the conduction operation in response to the key signal. The user executes key operation through the key control circuit, and when the key signal is output to the first switch circuit, the first switch circuit is conducted. The power input port provides an electrical signal provided by an external power source to a voltage conversion circuit that converts the direct current to a voltage for powering the controller. After the controller is electrified, a control signal is output to the first switch circuit, and the control signal replaces a key signal to maintain the first switch circuit in a conducting state. So that the external power supply can continuously supply power to the controller, and the power supply circuit can work normally. The embodiment of the application does not need the controller to be in the power-on state all the time so as to control the on and off of the second switch circuit, thereby reducing the power consumption and saving the electric energy resource.

In addition, each second switch circuit is connected between one power output port and one power input port, so that the power supply of each sensor can be independently controlled, a plurality of sensors can be prevented from being electrified simultaneously to generate surge current, and the damage of devices is prevented.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a circuit configuration diagram of a power supply circuit according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of the key control circuit, the key detection circuit and the first switch circuit in fig. 1.

FIG. 3 is a schematic diagram of the logic OR gate in FIG. 2.

Fig. 4 is a schematic diagram of the voltage conversion circuit in fig. 1.

Fig. 5 is a schematic structural diagram of a protection circuit according to an embodiment of the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like are used in this specification for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the utility model described below can be combined with one another as long as they do not conflict with one another.

Referring to fig. 1, fig. 1 is a circuit configuration diagram of a power supply circuit according to an embodiment of the present utility model, where the power supply circuit includes a power input port 100, a first switch circuit 200, a key control circuit 300, a voltage conversion circuit 400, a controller 500, second switch circuits (610 and 620), and a power output port 710 corresponding to the second switch circuit 610 and a power output port 720 corresponding to the second switch circuit 620 (two second switch circuits and two power output ports are shown in the figure as an example).

The power input port 100 is used for being connected to an external power source (not shown in the figure, for example, may be a battery power source), the power output ports are used for being respectively connected to sensors (not shown in the figure) to supply power to the sensors, the number of the power output ports may be more than two, specifically, the number of the power output ports may be the same as the number of the sensors, and each power output port is connected to one sensor to supply power to each sensor.

A second switching circuit (610, 620) is connected between the power input port 100 and the power output ports (710, 720) for controlling the on and off between the power input port and each of the power output ports. The number of the second switch circuits may be at least two, specifically, the number of the second switch circuits may be the same as the number of the power output ports and the sensors, and each second switch circuit is connected between one power output port and one power input port. Therefore, the power supply of each sensor can be controlled independently, for example, the second switch circuits can be controlled to be conducted sequentially according to related time sequences, the condition that a plurality of sensors are electrified simultaneously to generate surge current is avoided, and the devices are prevented from being damaged.

One end of the key control circuit 300 is electrically connected to the first switch circuit 200, and the other end thereof may be connected to a power source (e.g., a battery power source), and is configured to output a key signal in response to a key operation, wherein the key signal is used to control the first switch circuit to perform a turn-on operation.

The first switch circuit 200 and the voltage conversion circuit 400 are sequentially connected between the power input port 100 and the controller 500, and the voltage conversion circuit is configured to convert the power voltage into the power voltage of the controller 500, for example, may convert the dc voltage 12V into the dc voltage 3.3V. The first switching circuit 200 is configured to perform a turn-on operation in response to a control signal output from the controller 500, and to perform a turn-on operation in response to a key signal output from the key control circuit 300.

The controller is electrically connected to the first switch circuit 200 and the second switch circuit, and is used for controlling the first switch circuit and the second switch circuit to be turned on or turned off.

When the unmanned device is in a shutdown state, a user performs a key operation through the key control circuit 300, and the key control circuit 300 outputs a key signal to the first switch circuit 200 to turn on the first switch circuit 200. The power input port 100 supplies a direct current (e.g., 12V) supplied from an external power source to the voltage conversion circuit 400, and the voltage conversion circuit 400 converts the direct current into a direct current (e.g., 3.3V) for powering the controller 500. After the controller 500 is powered on, a control signal is output to the first switch circuit, and the control signal maintains the first switch circuit in a conductive state instead of the key signal. So that the external power supply can continuously supply power to the controller, and the power supply circuit can work normally.

Taking the second switching circuit 610 as an example, the controller 500 may control the second switching circuit 610 to be turned on, and the power input port 100 outputs the direct current 12V to the second switching circuit 610, and the direct current passes through the second switching circuit 610 to the power output port 710 for supplying power to the sensor.

When the unmanned equipment is in a power-on state, a user executes key operation through the key control circuit 300 to close the power supply circuit, the key control circuit 300 outputs a key signal, the controller 500 sends out a power-off signal after detecting the key signal, the first switch circuit 200 is disconnected to stop supplying power to the controller 500, and the controller 500 is powered down, so that the controller can be in a power-off state at the same time when the unmanned equipment is in the power-off state, and the unmanned equipment is in a low-power-consumption state to save electric energy resources.

In one embodiment of the present utility model, referring to fig. 2, the key control circuit 300 includes a key switch 310, one end of the key switch 310 is connected to the power input port 100, and the other end is connected to the first switch circuit, when the key switch 310 is pressed. The power input port 100 is turned on with the first switch circuit, and provides an electrical signal (i.e., a key signal) to the first switch circuit, so that the first switch circuit is turned on.

In some embodiments, referring to fig. 2, the first switch circuit 200 includes a MOS transistor 210, a transistor 220 and a logic or gate 230, wherein a first end of the transistor 220 is connected to the logic or gate 230, a second end of the transistor 220 is grounded, and a third end of the transistor 220 is connected to the MOS transistor 210, and is turned on when the transistor 220 detects that the logic or gate 230 outputs a high level signal, so as to control the MOS transistor 210 to be turned on. The MOS tube 210 is further connected to the power input port 100 and the voltage conversion circuit 400, and when the MOS tube 210 is turned on, the external power source outputs a direct current to the voltage conversion circuit to supply power to the controller.

In some embodiments, referring to fig. 3, the logic or gate 230 further includes a first diode 2301 and a second diode 2302, the first diode 2301 is connected to the first terminals of the controller 500 and the triode 220, the second diode 2302 is connected to the first terminals of the key control circuit 300 and the triode 220, the first diode 2301 is used for detecting a control signal sent by the controller 500, and the second diode 2302 is used for detecting a key signal of the key control circuit 300.

In some embodiments, referring to fig. 2, the power supply circuit further includes a key detection circuit 800, the key detection circuit 800 includes a first resistor 810 and a second resistor 820, the first end of the first resistor 810 is grounded, the second end of the first resistor 810 is connected to the first end of the second resistor 820 and the controller 500, the first end of the second resistor 820 is connected to the second end of the first resistor 810 and the controller 500, the second end of the second resistor 820 is connected to the key control circuit 300 and the first switch circuit 200, when the unmanned device is in an on state, the key control circuit 300 is turned on, the key detection circuit detects a high level signal (i.e. a shutdown signal) between the first resistor 810 and the second resistor 820, the controller 500 receives the shutdown signal and then controls the first switch circuit to be turned off, thereby completing the power-down of the device.

In some embodiments, referring to fig. 4, the voltage conversion circuit 400 includes a first voltage conversion chip 410 and a second voltage conversion chip 420, the first voltage conversion chip 410 and the second voltage conversion chip 420 are sequentially connected between the first switch circuit 200 and the controller 500, when the unmanned device is turned on, the first switch circuit 200 outputs direct current (e.g. 12V) to the first voltage conversion chip 410, the first voltage conversion chip 410 converts direct current 12V into direct current (e.g. 5V) to the second voltage conversion chip 420, and the second voltage conversion chip 420 converts direct current 5V into direct current (e.g. 3.3V) to the controller 500, so as to realize power supply to the controller 500, wherein the first voltage conversion chip 410 may be a DCDC chip, and the second voltage conversion chip 420 may be an LD0 voltage conversion chip.

In an embodiment of the present utility model, referring to fig. 5, the power supply circuit further includes a voltage detection circuit 910, a temperature detection circuit 920, a current detection circuit 930, an anti-surge circuit 940, and a filter circuit 950, where the voltage detection circuit 910, the temperature detection circuit 920, and the current detection circuit 930 are sequentially connected between the power supply input port 100 and the controller 500, and are used for detecting information such as voltage, current, and temperature of the power supply input port 100, where the anti-surge circuit 940 is connected to the power supply input port 100, and may be a TVS tube, when the unmanned device is started, the direct current 12V is first output to the anti-surge circuit 940 through the power supply input port 100, the anti-surge circuit 940 determines whether the voltage exceeds a rated voltage value, if yes, the voltage is shunted to ground, so as to prevent damaging circuit devices, if the voltage is a normal value, the anti-surge circuit 940 outputs the direct current 12V to the filter circuit 950, the filter circuit 950 may be composed of a common mode inductance and a capacitor, high frequency noise and interference existing in the filter circuit, so as to ensure the stability of the power supply, and the filter circuit 950 outputs the filtered direct current 12V to the voltage conversion circuit 400. By arranging the circuit, the surge voltage and the surge current of the storage battery and high-frequency noise and interference possibly existing in the circuit can be prevented when the unmanned equipment is started, so that unmanned equipment devices are protected.

In the following, a specific embodiment is taken as an example to illustrate the working principle of the present invention, when the unmanned device is in the off state and the key switch 310 is pressed, the key switch is turned on, the power source (e.g. battery power source) outputs the direct current to the second diode 2302, the second diode 2302 receives the high level, the second diode 2302 is turned on, the high level is output to the triode 220, the triode 220 is turned on, the MOS 210 is turned on after the triode 220 is turned on, the external power source outputs the direct current 12V to the voltage conversion circuit 400 through the power input port 100, the voltage conversion circuit 400 converts the direct current 12V into the direct current 3.3V, and outputs the direct current to the controller 500, the controller 500 is powered on, the high level is output to the first diode 2301, the first diode 2301 is turned on, then the key switch 301 is turned off, the second diode 2302 is turned off, and the controller 500 is still in the powered on state, so as to complete the power supply to the controller 500.

Taking the second switch circuit 610 as an example, after the controller 500 is in the power-on state, the second switch circuit 610 is controlled to be turned on, and the power input port 100 outputs the direct current 12V to the power output port 710 through the second switch circuit 610, so as to supply power to the sensor.

In a specific implementation, when the controller 500 is in a power-on state, the second switch circuit 610 and the second switch circuit 620 are controlled to be turned on sequentially according to related time sequences, so that a plurality of sensors are prevented from being powered on simultaneously to generate surge current, and damage to devices is prevented.

The power output ports 710 correspond to the second switch circuits 610, the power output ports 720 correspond to the second switch circuits 620, and are used for connecting with external sensors, one power output port corresponds to one sensor, taking the power output ports 710 as an example, when the second switch circuits 610 are turned on, direct current 12V is output to the power output ports 710, and the power output ports 710 are connected to the external sensors, so as to supply power to the external sensors.

In a specific implementation, the second switch circuit 610 and the second switch circuit 710 are turned on one by one, and the power output port 710 and the power output port 720 are powered on sequentially, so that the external sensor is powered on independently sequentially, and the external sensor is protected.

When the unmanned device is in the on state and the key switch 310 is pressed, the key detection circuit 800 detects a high level, the controller 500 sends a shutdown signal to stop supplying power to the first diode 2301, the first diode 2301 is turned off, then the key switch 310 is turned off, the second diode 2302 cannot receive the high level and is also in the off state, so that the first switch circuit 200 is turned off to stop supplying power to the controller 500, and the controller 500 is powered down, thereby ensuring that the controller is in the powered down state at the same time when the unmanned device is in the off state, and the unmanned device is in the ultralow power consumption state to save electric energy resources.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

It should be noted that while the present utility model has been illustrated in the drawings and described in connection with the preferred embodiments thereof, it is to be understood that the utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but are to be construed as providing a full breadth of the disclosure. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (10)

1. A power supply circuit, comprising: the power input port, at least two power output ports, a controller, a key control circuit, a voltage conversion circuit, a first switch circuit and at least two second switch circuits, wherein,

The power input port is used for connecting a power supply;

the at least two power output ports are used for being respectively connected with the sensor to supply power for the sensor;

the key control circuit is configured to respond to key operation and output a key signal;

The first switch circuit and the voltage conversion circuit are sequentially connected between the power input port and the controller, the voltage conversion circuit is configured to convert a power supply voltage into a power supply voltage of the controller, the first switch circuit is configured to perform a conduction operation in response to a control signal output by the controller, and to perform a conduction operation in response to the key signal;

The number of the at least two second switch circuits is the same as the number of the at least two power output ports, and the second switch circuits are connected between the power input ports and the power output ports and are configured to perform a turn-on operation in response to a control signal of the controller so as to turn on the power input ports and the power output ports.

2. The power supply circuit of claim 1, wherein the first switching circuit comprises: logic OR gate circuit, triode and MOS tube, in which,

The logic OR gate circuit is respectively connected with the controller, the key control circuit and the triode;

The triode is also connected between the MOS tube and the ground;

The MOS tube is also connected between the power input port and the voltage conversion circuit.

3. The power circuit of claim 2, wherein the logic or gate circuit comprises a first diode and a second diode, wherein the first diode is connected between the controller and the first terminal of the transistor; the second diode is connected between the key control circuit and the first end of the triode.

4. A power supply circuit according to claim 3, wherein the key control circuit comprises:

And the key switch is respectively connected with the power input port and the second diode.

5. The power supply circuit of claim 4, further comprising:

the key detection circuit comprises a first resistor and a second resistor, wherein the first end of the first resistor is connected with the key control circuit, the second end of the first resistor is respectively connected with the first end of the second resistor and the controller, and the second end of the second resistor is grounded.

6. The power supply circuit of any one of claims 1-5, further comprising:

The temperature detection circuit is connected with the controller and used for detecting the temperature of the power supply circuit;

the voltage detection circuit is connected with the controller and the power input port and is used for collecting the voltage value of the power input port so as to realize overvoltage protection;

And the current detection circuit is connected with the power input port and the controller and is used for detecting circuit current so as to realize overcurrent protection.

7. The power supply circuit of claim 6, further comprising:

and the anti-surge circuit is connected with the power input port and is used for shunting the abnormal voltage to the ground.

8. The power supply circuit of claim 7, further comprising:

And the filter circuit is connected with the power input port and the conversion circuit and is used for filtering circuit signals.

9. A power supply device comprising the power supply circuit according to any one of claims 1 to 8 and a housing;

The power supply circuit is accommodated in the shell, the shell comprises at least two external ports, and the external ports are respectively connected with the power supply input port and the power supply output port of the power supply circuit.

10. An unmanned device comprising the power supply apparatus of claim 9.