CN112586088A

CN112586088A - Drive system and movable platform

Info

Publication number: CN112586088A
Application number: CN202080004311.9A
Authority: CN
Inventors: 牛金涛; 邱贞平; 李彬齐
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-03-30
Also published as: WO2021212307A1

Abstract

A drive system, comprising: the device comprises a power supply (11), a protection circuit (12), a microcontroller (13) and an LED load (14). The power supply (11) is used for supplying power to a plurality of systems including the driving system in the movable platform, and the volume of a circuit in the movable platform and the cost of the circuit are reduced due to the sharing of the power supply (11); the protection circuit (12) is used for outputting a first control signal, receiving a second control signal output by the microcontroller (13) and controlling the lighting condition of the LED load (14) according to the logic processing result of the two control signals, the working state of the LED load (14) is directly controlled to be an independent protection circuit (12) instead of the microcontroller (13) with high working pressure, the driving system can realize the timely control of the LED load by virtue of the independent protection circuit, and the damage to devices caused by untimely control is avoided. Also included is a movable platform comprising the drive system described above.

Description

Drive system and movable platform

Technical Field

The invention relates to the technical field of equipment control, in particular to a driving system and a movable platform.

Background

Movable platforms such as unmanned aerial vehicles, unmanned vehicles, and the like have been widely used in numerous fields at present. Use unmanned aerial vehicle as an example, can be equipped with other loads including the LED load on the unmanned aerial vehicle, the operating conditions of unmanned aerial vehicle can be reflected to the LED load, and various flight functions of unmanned aerial vehicle's realization can be guaranteed to other loads.

In the prior art, it is typically a control signal generated by a microcontroller in the drone to directly control whether the LEDs are on. But microcontroller is when controlling whether LED lights, still need control other parts in the unmanned aerial vehicle, for example electricity is transferred, is flown to control, sensor etc. to make unmanned aerial vehicle can normally fly. Like this, microcontroller's processing pressure is great, then can appear the condition whether unable timely control LED lights to lead to the user can not be timely the understanding unmanned aerial vehicle's running state, further, still can make the maloperation because of unable timely understanding running state.

Therefore, how to ensure the timeliness of the LED load driving becomes an urgent problem to be solved.

Disclosure of Invention

The invention provides a driving system and a movable platform, which are used for timely and accurately controlling the working state of an LED load.

A first aspect of the present invention is directed to a drive system, the system comprising: the LED lamp comprises a power supply, a protection circuit, a microcontroller and an LED load;

the input end of the protection circuit is respectively connected with the power supply and the microcontroller, and the output end of the protection circuit is connected with the LED load;

the power supply is used for supplying power to a plurality of systems including the driving system in the movable platform; the protection circuit is used for outputting a first control signal according to an output result of the driving system; and performing logic processing on the first control signal and the second control signal output by the microcontroller and controlling the working state of the LED load according to the processing result.

A second aspect of the present invention is to provide a movable platform comprising: the device comprises a machine body, a power system, a driving system and a control device;

the power system is arranged on the machine body and used for providing power for the movable platform;

the drive system specifically includes: the LED lamp comprises a power supply, a protection circuit and an LED load;

the input end of the protection circuit is respectively connected with the power supply and the control device, and the output end of the protection circuit is connected with the LED load;

the power supply is used for supplying power to a plurality of systems including the driving system in the movable platform; the protection circuit is used for outputting a first control signal according to an output result of the driving system; carrying out logic processing on the first control signal and a second control signal output by the control device and controlling the working state of the LED load according to a processing result;

and the control device is used for generating the second control signal according to the working state of the movable platform.

The present invention provides a drive system including: power supply, protection circuit, microcontroller and LED load. The input end of the protection circuit is connected with the power supply and the microcontroller respectively, and the output end of the protection circuit is connected with the LED load.

And based on the connection relation, the power supply is used for supplying power to a plurality of systems including the driving system in the movable platform. And the protection circuit is used for outputting a first control signal according to the output result of the whole driving system, receiving a second control signal output by the microcontroller, performing logic processing on the two control signals, and finally controlling the lighting condition of the LED load according to the processing result.

As can be seen from the above description, in one aspect, the power supply of the drive system is used to simultaneously power a plurality of systems in the movable platform, such as the drive system, the flight control system, and the like, and the power supply is actually a common power supply. Due to the sharing of the power supply, a separate power supply for the driving system is not needed as in the prior art, so that the size and the cost of a circuit in the movable platform are reduced.

On the other hand, the control of the working state of the LED load needs to be performed simultaneously according to the first control signal output by the protection circuit and the second control signal output by the microcontroller, and the direct control of the working state of the LED load is an independent protection circuit rather than the microcontroller, and the microcontroller is only used for sending the second control signal and does not undertake any control work. Therefore, the condition that whether the LED load is lightened or not cannot be controlled in time due to overlarge working pressure of the microcontroller is avoided, the working state of the LED load can be controlled in time, and meanwhile, the LED load is prevented from being damaged due to untimely control. Due to the timely control, a user can know the working state of the movable platform in time according to the lighting condition of the LED load.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a driving system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another driving system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another driving system according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another driving system according to an embodiment of the present invention;

FIG. 5 is a schematic circuit diagram of a driving system according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a movable platform according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below may be combined with each other without conflict between the embodiments.

Fig. 1 is a schematic structural diagram of a driving system according to an embodiment of the present invention. As shown in fig. 1, the system may include: a power supply 11, a protection circuit 12, a microcontroller 13 and an LED load 14.

Wherein, the input end of the protection circuit 12 is respectively connected with the power supply 11 and the microcontroller 13, and the output end of the protection circuit 12 is connected with the LED load 14.

The work engineering of the drive system can be described as: the power supply 11 supplies power to the entire drive system. After the power supply is started, the protection circuit 12, on the one hand, can output the first control signal according to the output result of the entire driving system, wherein the output result may be the current value or the voltage value of the driving system. On the other hand, it is also possible to receive a second control signal issued by the microcontroller 13. The second control signal output by the microcontroller 13 is not related to the driving system, but related to the working state of other systems or functional modules and devices in the movable platform, such as the working state of sensors, electric actuators, flight control systems of the movable platform, and so on.

Then, the protection circuit 12 further performs logic processing on the two control signals, and controls the operating state of the LED load 14 according to the processing result, that is, whether to light the LED load 14.

In practical applications, when the first control signal output by the protection circuit 12 is a low level signal and the microcontroller 13 outputs a high level signal, it may be considered that the driving system is in a normal operating state at this time, and the processing result obtained after the logic processing by the protection circuit 12 is a low level signal. The protection circuit 12 outputs the low signal to light the LED load 14.

In another case, when the first control signal output by the protection circuit 12 is a low level signal and the microcontroller 13 outputs the low level signal, the protection circuit 12 performs logic processing to obtain a processing result that the output state of the protection circuit 12 is a high impedance state, and the LED load 14 is turned off.

In another case, when the first control signal output by the protection circuit 12 is a high-level signal and the microcontroller 13 outputs a high-level signal, it may be considered that an overcurrent condition occurs in the driving system at this time, and the processing result obtained after the protection circuit 12 performs logic processing is: the output state of the protection circuit 12 is a high impedance state. The high resistance state of the protection circuit 12 causes the LED load 14 to extinguish, thereby avoiding damage to the LED load 14 due to overcurrent.

Based on the above description, it should be noted that the power supply 11 supplies power to the driving system and other power modules, devices or systems in the movable platform. Such as simultaneously powering sensors, electrical tilt, flight control systems, etc. deployed in the movable platform. It can be seen that this power supply 11 is actually a power supply common to the modules and systems in a mobile platform.

In addition, as for the above-mentioned movable platform, it may be an intelligent robot having a motion capability, or the like, in addition to the unmanned aerial vehicle, unmanned ship, or the like mentioned in the background. And the driving system provided by the embodiment of the invention is also suitable for any electronic equipment with an LED load.

In the driving system of the present embodiment, on the one hand, the power supply 11 of the driving system is a common power supply. It is due to the common use of the power supply 11 that the size and cost of the circuitry in the movable platform is reduced. On the other hand, the control of the operating state of the LED load 14 needs to be performed simultaneously according to the first control signal output by the protection circuit 12 and the second control signal output by the microcontroller 13, and the operating state of the LED load 14 is controlled by an independent protection circuit 12, and the microcontroller 13 is only used for sending the second control signal and does not undertake any control operation. Therefore, the situation that the microcontroller 13 cannot control whether the LED load 14 is lighted or not in time due to overlarge working pressure is avoided, and the damage to the LED load 14 caused by untimely control is also avoided while the working state of the LED load 14 can be controlled in time is ensured. It is also due to this timely control that the user can know the operating state of the movable platform in time based on the lighting of the LED load 14.

On the basis of the embodiment shown in fig. 1, fig. 2 is a schematic structural diagram of another driving system provided in the embodiment of the present invention, and as shown in fig. 2, the system may further include: and a switching circuit 15.

Wherein, the input end of the switch circuit 15 is connected with the output end of the protection circuit 12, and the output end of the switch circuit 15 is connected with the LED load 14.

The processing result output from the protection circuit 12 is input to the switching circuit 15. The switching circuit 15 controls its own switching state based on the processing result. When the switch circuit 15 controls itself to be turned on, the LED load 14 is turned on; when the control itself is turned off, the LED load 14 is extinguished.

In this embodiment, on the basis of the beneficial effects achieved by the embodiment shown in fig. 1, a switch circuit 15 is further added to the front end of the LED load 14. The processing result output by the protection circuit 12 is input to the switch circuit 15, and finally the operating state of the LED load 14 is controlled by the switching state of the switch circuit 15 itself. The use of the switch circuit 15 is equivalent to adding a protective barrier to the LED load 14, so as to prevent the LED load 14 from being damaged when an overcurrent or other faults occur in the driving system.

On the basis of the driving system provided by each of the above embodiments, in an alternative manner, as shown in fig. 3, the protection circuit 12 in the driving system may specifically include: a logic processing sub-circuit 121, a sampling sub-circuit 122, a threshold setting sub-circuit 123, and a comparison sub-circuit 124.

The connection relationship among the sub-circuits may be: the input of the sampling sub-circuit 122 is connected to the power supply 11, and the output of the sampling sub-circuit 122 is connected to the input of the threshold setting sub-circuit 123 and the input of the comparison sub-circuit 124, respectively. The output of the threshold setting sub-circuit 123 is connected to the input of the comparison sub-circuit 124, and the output of the comparison sub-circuit 124 is connected to the logic processing sub-circuit 121. The output of the logic processing sub-circuit 121 is connected to the LED load 14.

The operation of the plurality of sub-circuits may be: the sampling sub-circuit 122 is used to collect the output result of the driving system, and in practical applications, the output result is usually a current value. The sampling sub-circuit 122 will then convert it to a corresponding voltage value, but both the pre-conversion current value and the post-conversion voltage value can be considered as the actual output of the drive system. The threshold setting sub-circuit 123 is used for outputting a preset reference output result, i.e., a preset voltage value. Alternatively, the preset voltage value may be set according to actual requirements.

And the comparison sub-circuit 124 is configured to receive the actual voltage value collected by the sampling sub-circuit 122 and the preset voltage value output by the threshold setting sub-circuit 123, compare the actual voltage value and the preset voltage value, and input a comparison result to the logic processing sub-circuit 121.

As for the comparison result, if the actual voltage value is greater than or equal to the preset voltage value, the comparison sub-circuit 124 outputs a high level signal, which indicates that an overcurrent condition occurs in the driving system. If the actual voltage value is smaller than the preset voltage value, the comparison sub-circuit 124 outputs a low level signal, which indicates that the driving system is working normally. The high level signal or the low level signal outputted by the comparison sub-circuit 124 may be equivalent to the first control signal in the embodiments shown in fig. 1-2.

The logic processing sub-circuit 121, while receiving the high-low level signal outputted by the comparing sub-circuit 124, may also receive a second control signal sent by the microcontroller 13, and perform logic processing on the two control signals, so as to control the operating state of the LED load 14 by using the processing result.

As for the processing result, in one case, if the comparison sub-circuit 124 outputs a low signal and the microcontroller 13 outputs a high signal, the logic processing result is a low signal, that is, the logic processing sub-circuit 121 outputs a low signal, and the LED load 14 is turned on.

In another case, if the comparison sub-circuit 124 outputs a low signal and the microcontroller 13 outputs a low signal, the logic processing result is: the output state of the logic processing sub-circuit 121 is a high impedance state, at which the LED load 14 is off.

Alternatively, if the comparison sub-circuit 124 outputs a high signal and the micro-controller 13 outputs a high signal, the logic processing result is: the output state of the logic processing sub-circuit 121 is a high impedance state, at which the LED load 14 is off.

In this embodiment, the sampling sub-circuit 122, the threshold setting sub-circuit 123 and the comparing sub-circuit 124 are used in combination to determine whether there is an over-current phenomenon in the driving system. Meanwhile, the independent logic processing sub-circuit 121 is used to perform logic processing on the control signals output by the comparison sub-circuit 124 and the microcontroller 13, so as to drive the LED load 14 to work. That is, the working state of the LED load 14 is controlled by the independent logic processing sub-circuit 121 in the separate protection circuit 12, and the microcontroller 13 is not needed in the control process, so that the working state of the LED load 14 is controlled in time, and the damage to the LED load 14 caused by untimely control is avoided.

On the basis of the embodiment shown in fig. 3, as for the protection circuit 12 in the driving system, in another optional manner, as shown in fig. 4, the protection circuit 122 in the driving system may specifically further include: a capability enhancer circuit 125 and a delay subcircuit 126.

The connection relationship among the circuits may be: an input of the capability enhancer circuit 125 is connected to an output of the comparison sub-circuit 124. The input of the delay sub-circuit 126 is connected to the output of the capability enhancer circuit 125; an output of the delay sub-circuit 126 is connected to an input of the logic processing sub-circuit 121.

The operation of the plurality of sub-circuits may be described as: the comparison sub-circuit 124 may input the comparison result output in the manner shown in fig. 3 to the capability enhancer circuit 125. The ability enhancer circuit 125 further determines its own operation state according to the comparison result.

When the comparison sub-circuit 124 outputs a high level signal, the capability enhancer circuit 125 determines that it starts operating to enhance the loaded capability of the comparison sub-circuit 124, and the capability enhancer circuit 125 outputs a high level signal corresponding to the operating state. The capability enhancer circuit 125, the delay sub-circuit 126, and the logic processing sub-circuit 121 may be considered as loads of the comparison sub-circuit 124.

The delay sub-circuit 126, after receiving the high level signal outputted from the capability enhancer circuit 125, controls itself to continuously output the high level signal within a predetermined time period, where the high level signal is the first control signal in the example shown in fig. 1-2. At this time, the LED load 14 stops operating for a preset time. The overcurrent phenomenon occurring in the driving system within the preset time can be gradually relieved until the overcurrent phenomenon disappears, so that the damage of the system overcurrent to the LED load 14 is avoided. The preset duration can be set manually according to the requirement.

When the comparison sub-circuit 124 outputs a low level signal, the ability enhancer circuit 125 does not operate, and the output state of the ability enhancer circuit 125 is a high impedance state.

The delay sub-circuit 126 outputs a low signal, which is the first control signal in the above embodiment, when the output state of the capability enhancer circuit 125 is in a high impedance state. At this time, whether the LED load 14 is normally operated may be controlled based on the level signal output from the microcontroller 13.

In this embodiment, when the driving system is in an overcurrent state, the capability enhancer circuit 125 starts to operate to enhance the loaded capability of the comparison sub-circuit 124, so that the logic processing sub-circuit 121 can perform logic operation timely and accurately to ensure that the LED load 14 is turned off timely. Meanwhile, the delay sub-circuit 126 may also provide a delay of a predetermined duration, and the LED load 14 is turned off for the predetermined duration. The overcurrent phenomenon can be gradually relieved to be eliminated through time delay, and the LED load 14 is prevented from being damaged. After a certain time delay, the driving system can continue to work normally.

The operation of the drive system has been described in the form of modules in the above embodiments. In practical applications, for different situations of the output states of the individual sub-circuits and the final operating state of the LED load 14, there may be the following situations:

in one case, if the sampling sub-circuit 122 collects that the actual voltage value is greater than or equal to the preset voltage value output by the threshold setting sub-circuit 123, the comparison sub-circuit 124 outputs a high level signal corresponding to the comparison result; the ability enhancer circuit 125 is in an active state, and outputs a high level signal; the delay sub-circuit 126 outputs a high level signal, which is also the first control signal.

If the first control signal is a high level signal and the second control signal output by the microcontroller 13 is also a high level signal, the processing result of the logic processing sub-circuit 121 is: when the output state of the logic processing sub-circuit 121 is a high impedance state, the switch circuit 15 is in an off state, and the LED load 14 is turned off. This is the case when an overcurrent occurs in the drive system.

In another case, if the sampling sub-circuit 122 collects that the actual voltage value is smaller than the preset voltage value output by the threshold setting sub-circuit 123, the comparison sub-circuit 124 outputs a low level signal corresponding to the comparison result; the capability enhancer circuit 125 is inactive and the output state of this sub-circuit is high impedance; the delay sub-circuit 126 outputs a low level signal, which is also the first control signal.

If the first control signal is a low level signal and the second control signal output by the microcontroller 13 is a high level signal, the logic processing sub-circuit 121 outputs a low level signal, the switch circuit 15 is in an open state, and the LED load 14 is turned on. This is the case when the drive system is operating normally.

In a similar manner to the above case, in another case, if the sampling sub-circuit 122 collects that the actual voltage value is smaller than the preset voltage value output by the threshold setting sub-circuit 123, the obtained first control signal is a low level signal.

If the first control signal is a low level signal and the second control signal output by the microcontroller 13 is a low level signal, the processing result of the logic processing sub-circuit 121 is: the output state of the logic processing sub-circuit 121 is a high impedance state, the switch circuit 15 is in an off state, and the LED load 14 is off.

The operation of the drive system has been described in the form of modules in the above embodiments. A corresponding circuit schematic of this drive system can be seen in fig. 5. The specific configuration and operation of the drive system will be described in the form of specific electronic components with reference to fig. 5.

Optionally, the switch circuit 15 in the embodiment shown in fig. 2 may specifically include: a first resistor R1, a second resistor R2 and a first field effect transistor Q1.

A first terminal of the first resistor R1 is connected to the output terminal of the logic processing sub-circuit 121, and a second terminal of the first resistor R1 is connected to the sampling sub-circuit 122. In conjunction with the following, the first terminal of the first resistor R1 is connected to the drain D of the third fet Q3 in the logic processing sub-circuit 121. The second terminal of the first resistor R1 is connected to the second terminal of the fifth resistor R5 in the sampling sub-circuit 122.

The gate G of the first fet Q1 is connected to the first terminal of the first resistor R1, the source S of the first fet Q1 is connected to the second terminal of the first resistor R1, and the drain D of the first fet Q1 is connected to the first terminal of the second resistor R2.

A first terminal of the second resistor R2 is connected to the LED load 14, and a second terminal of the second resistor R2 is connected to ground.

The first resistor R1 and the second resistor R2 are voltage dividing resistors. The first fet Q1 is a PMOS transistor that is turned on high.

Optionally, the logic processing sub-circuit 121 in the embodiment shown in fig. 2 may specifically include: a third resistor R3, a fourth resistor R4, a second field effect transistor Q2 and a third field effect transistor Q3.

A first terminal of the third resistor R3 is connected to the microcontroller 13, and a second terminal of the third resistor R3 is grounded.

A first end of the fourth resistor R4 is connected to a first end of the third resistor R3, a second end of the fourth resistor R4 is connected to the gate G of the third fet Q3, the source S of the third fet Q3 is grounded, and the drain D of the third fet Q3 is connected to a first end of the first resistor R1.

The drain D of the second fet Q2 is connected to the second terminal of the fourth resistor R4, the source S of the second fet Q2 is grounded, and the gate G of the second fet Q2 is connected to the delay sub-circuit 126. In conjunction with the following, the gate G of the second fet Q2 is connected to the first terminal of the fourth capacitor C4 in the delay sub-circuit 126.

The third resistor R3 is a pull-down resistor, and the second resistor R2 is a current-limiting resistor. The first fet Q1 and the second fet Q2 are both NMOS transistors that are turned on at a low level. And in practical applications, the logic processing function of the logic processing sub-circuit 121 can also be realized by a logic processing device.

Optionally, the sampling sub-circuit 122 in the embodiment shown in fig. 2 may specifically include: and a fifth resistor R5.

A first terminal of the fifth resistor R5 is connected to the power supply VCC (i.e., the power supply 11 in the above embodiments), and a second terminal of the fifth resistor R5 is connected to the second terminal of the first resistor R1.

It should be noted that, in addition to the function of collecting the output result of the driving system, the fifth resistor R5 may be multiplexed into the switching circuit 15 and the comparison sub-circuit 124. The size of the circuit can be reduced by multiplexing the elements. In addition, the second resistor R2 and the fifth resistor R5 can be used in combination to adjust the operating voltage of the LED load 14, so that the driving system provided by the embodiments of the present invention can be applied to the LED load 14 of each specification.

Optionally, the threshold setting sub-circuit 123 in the embodiment shown in fig. 2 may specifically include: a sixth resistor R6, a seventh resistor R7, and a first capacitor C1.

A first end of the sixth resistor R6 is connected to a first end of the fifth resistor R5, a second end of the sixth resistor R6 is connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is connected to the comparator circuit 124. With the following, the second terminal of the seventh resistor R7 is connected to the second terminal of the third capacitor C3 in the comparison sub-circuit 124. The sixth resistor R6 and the seventh resistor R7 are voltage dividing resistors.

A first terminal of the first capacitor C1 is connected to a first terminal of the seventh resistor R7, and a second terminal of the first capacitor C1 is connected to a second terminal of the seventh resistor R7.

It should be noted that the threshold value can be customized by designing the parameters of the fifth resistor R5 and the sixth resistor R6.

Optionally, the comparing sub-circuit 124 in the embodiment shown in fig. 2 may specifically include: an eighth resistor R8, a ninth resistor R9, a second capacitor C2, a third capacitor C3 and an amplifier U.

A first terminal of the eighth resistor R8 is connected to a second terminal of the fifth resistor R5, and a second terminal of the eighth resistor R8 is connected to the inverting input terminal of the amplifier U.

A first end of the ninth resistor R9 is connected to a second end of the eighth resistor R8, and a second end of the ninth resistor R9 is connected to a second end of the second capacitor C2.

A first terminal of the second capacitor C2 is connected to a first terminal of the ninth resistor R9, and a second terminal of the second capacitor C2 is grounded.

A first terminal of the third capacitor C3 is connected to the power supply VCC (i.e., the power supply 11), and a second terminal of the third capacitor C3 is grounded.

The eighth resistor R8 and the ninth resistor R9 are voltage dividing resistors. In addition, the comparison sub-circuit 124 may also be implemented by an operational comparator.

Optionally, the ability enhancer circuit 125 in the embodiment shown in fig. 3 may specifically include: and a triode D. The emitter e of the transistor D is connected to the delay sub-circuit 126, and in combination with the following, the emitter e of the transistor D is connected to the first end of the tenth resistor R10 in the delay sub-circuit 126.

The base b of the triode D is connected with the output end of the amplifier U, and the collector c of the triode D is connected with the power supply VCC (i.e., the power supply 11). In practical applications, the transistor D may be a MOSFET transistor.

Optionally, the delay sub-circuit 126 in the embodiment shown in fig. 3 may specifically include: a tenth resistor R10 and a fourth capacitor C4.

A first end of the tenth resistor R10 is connected to the emitter e of the transistor D, and a second end of the tenth resistor R10 is grounded. The tenth resistor R10 is a discharge resistor.

A first terminal of the fourth capacitor C4 is connected to a first terminal of the tenth resistor R10, and a second terminal of the fourth capacitor C4 is grounded.

It should be noted that the failure recovery time of the circuit can be customized by the parameter design of the tenth resistor R10 and the fourth capacitor C4.

According to the above-described components of the circuits, the driving systems provided by the embodiments of the present invention are all composed of simpler devices such as resistors, capacitors, and transistors, so that the circuit size can be ensured.

For the three cases described before the embodiment shown in fig. 5, the operating states of the components in the circuit diagram are explained in each case separately below:

in one case, if the sampling sub-circuit 122 collects that the actual voltage value is greater than or equal to the preset voltage value output by the threshold setting sub-circuit 123, the comparison sub-circuit 124 outputs a high level signal corresponding to the comparison result. At this time, the ability enhancer circuit 125 is in an active state, and outputs a high level signal, that is, the transistor D in the ability enhancer circuit 125 is in a conducting state. The first control signal output by the delay sub-circuit 126 is a high level signal.

If the first control signal is a high level signal and the second control signal output by the microcontroller 13 is also a high level signal, the processing result of the logic processing sub-circuit 121 is: the output state of the logic processing sub-circuit 121 is a high impedance state, the switch circuit 15 is in an off state, and the LED load 14 is off. Specifically, the second fet Q2 in the logic processing sub-circuit 121 is in the on state, and the third fet Q3 is in the off state; the first field effect transistor Q1 in the switching circuit 15 is in the off state. This is the case when an overcurrent occurs in the drive system.

In another case, if the sampling sub-circuit 122 collects that the actual voltage value is smaller than the preset voltage value output by the threshold setting sub-circuit 123, the comparing sub-circuit 124 outputs a low level signal. At this time, the ability enhancer circuit 125 does not operate, and the output state of the ability enhancer circuit 125 is a high-impedance state, that is, the transistor D in the ability enhancer circuit 125 is in a cut-off state. Meanwhile, the first control signal output by the delay sub-circuit 126 is a low level signal.

If the first control signal is a low level signal and the second control signal output by the microcontroller 13 is a high level signal, the logic processing sub-circuit 121 outputs a low level signal, the switch circuit 15 is in an open state, and the LED load 14 is turned on. Specifically, the second fet Q2 in the logic processing sub-circuit 121 is in the off state, and the third fet Q3 is in the on state; the first fet Q1 in the switching circuit 15 is in a conducting state.

If the first control signal is a low level signal and the second control signal output by the microcontroller 13 is a low level signal, the processing result of the logic processing sub-circuit 121 is: the output state of the logic processing sub-circuit 121 is a high impedance state, the switch circuit 15 is in an off state, and the LED load 14 is off. Specifically, the second fet Q2 in the logic processing sub-circuit 121 is in the on state, and the third fet Q3 is in the off state; the first field effect transistor Q1 in the switching circuit 15 is in the off state.

Fig. 6 is a schematic structural diagram of a movable platform according to an embodiment of the present invention; referring to fig. 6, an embodiment of the present invention provides a movable platform, which is at least one of the following: unmanned aerial vehicles, unmanned boats, unmanned vehicles, mobile intelligent robots, and the like; specifically, the movable platform includes: body 21, power system 22, drive system 23, and control device 24.

The power system 22 is disposed on the machine body 21 and configured to provide power for the movable platform.

The driving system 23 specifically includes: a power supply 231, a protection circuit 232, and an LED load 233.

The input end of the protection circuit 232 is connected to the power supply 231 and the control device 24, respectively, and the output end of the protection circuit 232 is connected to the LED load 233.

The power supply 231 is configured to supply power to a plurality of systems including the driving system in the movable platform. The protection circuit 232 is configured to output a first control signal according to an output result of the driving system; the first control signal and the second control signal output by the control device 24 are logically processed and the operating state of the LED load 233 is controlled according to the processing result.

The control device 24 is configured to generate the second control signal according to the working state of the movable platform.

Optionally, the drive system further comprises: a switching circuit 234.

An input end of the switch circuit 234 is connected to an output end of the protection circuit 232, and an output end of the switch circuit 234 is connected to the LED load 233.

The switch circuit 234 is configured to determine a switching state thereof and an operating state of the LED load 233 according to a processing result output by the protection circuit 232.

Optionally, the protection circuit 232 specifically includes:

and the output end of the logic processing sub-circuit 2321 is connected with the LED load 223.

The logic processing sub-circuit 2321 is configured to perform logic processing on the received first control signal and the second control signal.

Optionally, the protection circuit 222 further includes: a sampling sub-circuit 2322, a threshold setting sub-circuit 2323, and a comparison sub-circuit 2324.

The input end of the sampling sub-circuit 2322 is connected to the power supply 231, the output end of the sampling sub-circuit 2322 is connected to the input end of the threshold setting sub-circuit 2323 and the input end of the comparison sub-circuit 2324, the output end of the threshold setting sub-circuit 2323 is connected to the input end of the comparison sub-circuit 2324, and the output end of the comparison sub-circuit 2324 is connected to the logic processing sub-circuit 2221.

The comparison sub-circuit 2324 is configured to compare the actual voltage value of the driving system collected by the sampling sub-circuit 2322 with a preset voltage value output by the threshold setting sub-circuit 2323; a level signal corresponding to the comparison result is input to the logic processing sub-circuit 2321.

Optionally, the protection circuit 232 further includes:

a capability enhancer circuit 2325 having an input connected to the output of the comparison subcircuit 2224.

The ability enhancer circuit 2325 is configured to determine an operating state of the device according to the level signal corresponding to the comparison result; the circuit output state corresponding to the operating state is input to the logic processing sub-circuit 2221.

Optionally, the protection circuit further comprises:

a delay subcircuit 2326.

The input end of the delay sub-circuit 2326 is connected with the output end of the ability enhancer circuit; the output of the delay sub-circuit 2326 is connected to the input of the logic processing sub-circuit 2321.

The delay sub-circuit 2326 is configured to determine, if the capacity enhancer circuit 2325 in the working state outputs a high level signal, that the high level signal output by itself within a preset time period is the first control signal, so that the LED load 233 stops working within the preset time period; and the number of the first and second groups,

if the output state of the capability enhancer circuit 2325 in the non-operating state is a high impedance state, a low level signal output by itself is determined as the first control signal, so that the LED load 233 operates normally.

Optionally, the switching circuit 234 includes: a first resistor R1, a second resistor R2 and a first field effect transistor Q1.

A first terminal of the first resistor R1 is connected to the output terminal of the logic processing sub-circuit 2321, and a second terminal of the first resistor R1 is connected to the sampling sub-circuit 2322.

The gate G of the first fet Q1 is connected to the first end of the first resistor R1, the source S of the first fet Q1 is connected to the second end of the first resistor R1, and the drain D of the first fet Q1 is connected to the first end of the second resistor R2.

A first terminal of the second resistor R2 is connected to the LED load 233, and a second terminal of the second resistor R2 is grounded.

Optionally, the logic processing sub-circuit 2321 in the protection circuit 232 includes: a third resistor R3, a fourth resistor R3, a second field effect transistor Q2 and a third field effect transistor Q3.

A first terminal of the third resistor R3 is connected to the control device 24, and a second terminal of the third resistor R3 is connected to ground.

The drain D of the second fet Q2 is connected to the second terminal of the fourth resistor R4, the source S of the second fet Q2 is grounded, and the gate G of the second fet Q2 is connected to the delay sub-circuit 2326.

Optionally, the sampling sub-circuit 2322 in the protection circuit 232 includes: and a fifth resistor R5.

A first terminal of the fifth resistor R5 is connected to the power supply 231, and a second terminal of the fifth resistor R5 is connected to the second terminal of the first resistor R1.

Optionally, the threshold setting sub-circuit 2323 in the protection circuit 232 includes: a sixth resistor R6, a seventh resistor R7, and a first capacitor C1.

A first end of the sixth resistor R6 is connected to a first end of the fifth resistor R5, a second end of the sixth resistor R6 is connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is connected to the comparison sub-circuit 2324.

A first end of the first capacitor C1 is connected with a first end of the seventh resistor R7, and a second end of the first capacitor C1 is connected with a second end of the seventh resistor R7.

Optionally, the comparison sub-circuit 2324 in the protection circuit 232 includes: an eighth resistor R8, a ninth resistor R9, a second capacitor C2, a third capacitor C3 and an amplifier U.

A first terminal of the ninth resistor R9 is connected to a second terminal of the eighth resistor R8, and a second terminal of the ninth resistor R9 is connected to a second terminal of the second capacitor C2.

The first end of the second capacitor C2 is connected to the first end of the ninth resistor R9, and the second end of the second capacitor C2 is grounded.

The first terminal of the third capacitor C3 is connected to the power supply 231, and the second terminal of the third capacitor C3 is grounded.

Optionally, the capability enhancer circuit 2325 in the protection circuit 232 includes: and a triode D. The emitter e of the triode D is connected to the delay sub-circuit 2326, the base b of the triode D is connected to the output terminal of the amplifier U, and the collector c of the triode D is connected to the power supply 231.

Optionally, the time delay sub-circuit 2326 in the protection circuit 232 includes: a tenth resistor R10 and a fourth capacitor C4.

A first terminal of the tenth resistor R10 is connected to the emitter e of the transistor D, and a second terminal of the tenth resistor R10 is grounded.

The specific operation and construction of the drive system in the movable platform shown in fig. 6 can be seen in the embodiments shown in fig. 1 to 5, which are not described in detail,

reference may be made to the description relating to the embodiments shown in figures 1 to 5. The implementation process and technical effect of the technical solution refer to the descriptions in the embodiments shown in fig. 1 to 5, and are not described herein again.

The technical solutions and the technical features in the above embodiments may be used alone or in combination in case of conflict with the present disclosure, and all embodiments that fall within the scope of protection of the present disclosure are intended to be equivalent embodiments as long as they do not exceed the scope of recognition of those skilled in the art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drive system for a movable platform, the system comprising: the LED lamp comprises a power supply, a protection circuit, a microcontroller and an LED load;

2. The system of claim 1, further comprising:

and the switching circuit is used for determining the switching state of the switching circuit and the working state of the LED load according to the processing result output by the protection circuit.

3. The system of claim 2, wherein the protection circuit comprises: and the logic processing sub-circuit is used for carrying out logic processing on the received first control signal and the second control signal.

4. The system of claim 3, wherein the protection circuit further comprises: a sampling sub-circuit, a threshold setting sub-circuit and a comparison sub-circuit;

the comparison sub-circuit is used for comparing the actual voltage value of the driving system collected by the sampling sub-circuit with a preset voltage value output by the threshold setting sub-circuit; and inputting a level signal corresponding to the comparison result into the logic processing sub-circuit.

5. The system of claim 4, wherein the protection circuit further comprises: the ability enhancer circuit is used for determining the working state of the ability enhancer circuit according to the level signal corresponding to the comparison result; and inputting the circuit output state corresponding to the working state into the logic processing sub-circuit.

6. The system of claim 5, wherein the protection circuit further comprises:

the time delay sub-circuit is used for determining a high level signal output by the capacity enhancer circuit within a preset time length as the first control signal if the capacity enhancer circuit in the working state outputs the high level signal, so that the LED load stops working within the preset time length; and the number of the first and second groups,

and if the output state of the ability enhancer circuit in the non-working state is a high-impedance state, determining a low-level signal output by the ability enhancer circuit as the first control signal so as to enable the LED load to work normally.

7. The system of claim 6, wherein the capability enhancer circuit outputs a high signal if the level signal corresponding to the comparison result output by the comparison sub-circuit is a high signal, and the first control signal output by the delay sub-circuit is a high signal.

8. The system according to claim 6, wherein if the level signal corresponding to the comparison result output by the comparison sub-circuit is a low level signal, the output state of the capability enhancer circuit is a high impedance state, and the first control signal output by the delay sub-circuit is a low level signal.

9. The system according to claim 7 or 8, wherein if the second control signal and the first control signal are both a high level signal or a low level signal, the output state of the logic processing sub-circuit is a high impedance state, the switch circuit is in an off state, and the LED load stops operating.

10. The system of claim 8, wherein if the first control signal is a low signal and the second control signal is a high signal, the logic processing sub-circuit outputs a low signal, the switch circuit is turned on, and the LED load starts to operate.

11. The system of claim 6, wherein the switching circuit comprises: the first resistor, the second resistor and the first field effect transistor;

the first end of the first resistor is connected with the output end of the logic processing sub-circuit, and the second end of the first resistor is connected with the sampling sub-circuit;

the grid electrode of the first field effect transistor is connected with the first end of the first resistor, the source electrode of the first field effect transistor is connected with the second end of the first resistor, and the drain electrode of the first field effect transistor is connected with the first end of the second resistor;

the first end of the second resistor is connected with the LED load, and the second end of the second resistor is grounded.

12. The system of claim 11, wherein the logic processing sub-circuit comprises: the resistor comprises a third resistor, a fourth resistor, a second field effect transistor and a third field effect transistor;

the first end of the third resistor is connected with the microcontroller, and the second end of the third resistor is grounded;

the first end of the fourth resistor is connected with the first end of the third resistor, the second end of the fourth resistor is connected with the grid electrode of the third field-effect tube, the source electrode of the third field-effect tube is grounded, and the drain electrode of the third field-effect tube is connected with the first end of the first resistor;

the drain electrode of the second field effect transistor is connected with the second end of the fourth resistor, the source electrode of the second field effect transistor is grounded, and the grid electrode of the second field effect transistor is connected with the time delay sub-circuit.

13. The system of claim 12, wherein the sampling sub-circuit comprises: a fifth resistor;

the first end of the fifth resistor is connected with the power supply, and the second end of the fifth resistor is connected with the second end of the first resistor.

14. The system of claim 13, wherein the threshold setting sub-circuit comprises: a sixth resistor, a seventh resistor and a first capacitor;

a first end of the sixth resistor is connected with a first end of the fifth resistor, a second end of the sixth resistor is connected with a first end of the seventh resistor, and a second end of the seventh resistor is connected with the comparison sub-circuit;

the first end of the first capacitor is connected with the first end of the seventh resistor, and the second end of the first capacitor is connected with the second end of the seventh resistor.

15. The system of claim 14, wherein the comparison sub-circuit comprises: the circuit comprises an eighth resistor, a ninth resistor, a second capacitor, a third capacitor and an amplifier;

a first end of the eighth resistor is connected with a second end of the fifth resistor, and a second end of the eighth resistor is connected with an inverting input end of the amplifier;

a first end of the ninth resistor is connected with a second end of the eighth resistor, and a second end of the ninth resistor is connected with a second end of the second capacitor;

the first end of the second capacitor is connected with the first end of the ninth resistor, and the second end of the second capacitor is grounded;

and the first end of the third capacitor is connected with the power supply, and the second end of the third capacitor is grounded.

16. The system of claim 15, wherein the capability enhancer circuit comprises: and the emitting electrode of the triode is connected with the time delay sub-circuit, the base electrode of the triode is connected with the output end of the amplifier, and the collecting electrode of the triode is connected with the power supply.

17. The system of claim 16, wherein the delay subcircuit comprises: a tenth resistor and a fourth capacitor;

a first end of the tenth resistor is connected with an emitting electrode of the triode, and a second end of the tenth resistor is grounded;

and the first end of the fourth capacitor is connected with the first end of the tenth resistor, and the second end of the fourth capacitor is grounded.

18. A movable platform, the platform comprising: the device comprises a machine body, a power system, a driving system and a control device;

19. The platform of claim 18, wherein the drive system further comprises:

20. The platform of claim 19, wherein the protection circuitry in the drive system comprises in particular:

and the logic processing sub-circuit is used for carrying out logic processing on the received first control signal and the second control signal.

21. The platform of claim 20, wherein the protection circuit in the drive system further comprises: a sampling sub-circuit, a threshold setting sub-circuit and a comparison sub-circuit;

22. The platform of claim 21, wherein the protection circuit in the drive system further comprises: the ability enhancer circuit is used for determining the working state of the ability enhancer circuit according to the level signal corresponding to the comparison result; and inputting the circuit output state corresponding to the working state into the logic processing sub-circuit.

23. The platform of claim 22, wherein the protection circuit in the drive system further comprises:

24. The platform of claim 23, wherein the switching circuit comprises: the first resistor, the second resistor and the first field effect transistor;

25. The platform of claim 24, wherein the logic processing subcircuit in the protection circuit comprises: the resistor comprises a third resistor, a fourth resistor, a second field effect transistor and a third field effect transistor;

the first end of the third resistor is connected with the control device, and the second end of the third resistor is grounded;

26. The platform of claim 25, wherein the sampling subcircuit in the protection circuit comprises: a fifth resistor;

27. The platform of claim 26, wherein the threshold setting subcircuit in the protection circuit comprises: a sixth resistor, a seventh resistor and a first capacitor;

28. The platform of claim 27, wherein the comparison subcircuit in the protection circuit comprises: the circuit comprises an eighth resistor, a ninth resistor, a second capacitor, a third capacitor and an amplifier;

29. The platform of claim 28, wherein the capability enhancer circuit in the protection circuit comprises: a triode;

the emitting electrode of the triode is connected with the time delay sub-circuit, the base electrode of the triode is connected with the output end of the amplifier, and the collecting electrode of the triode is connected with the power supply.

30. The platform of claim 29, wherein the delay sub-circuit in the protection circuit comprises: a tenth resistor and a fourth capacitor;