CN215871364U - Interface signal conversion circuit and unmanned aerial vehicle - Google Patents
Interface signal conversion circuit and unmanned aerial vehicle Download PDFInfo
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- CN215871364U CN215871364U CN202120923313.XU CN202120923313U CN215871364U CN 215871364 U CN215871364 U CN 215871364U CN 202120923313 U CN202120923313 U CN 202120923313U CN 215871364 U CN215871364 U CN 215871364U
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Abstract
The application provides an interface signal converting circuit and unmanned aerial vehicle. The interface signal conversion circuit comprises a level conversion circuit and an interface protocol converter; the interface protocol converter comprises a first sub-converter, a second sub-converter and a third sub-converter, wherein the input end of the first sub-converter is used for receiving an unmanned aerial vehicle universal serial bus interface signal, the input end of the second sub-converter is used for receiving an unmanned aerial vehicle serial peripheral interface signal, the input end of the third sub-converter is used for receiving an unmanned aerial vehicle flash memory interface signal, and the output end of the first sub-converter, the output end of the second sub-converter and the output end of the third sub-converter are used for outputting corresponding unmanned aerial vehicle pulse width modulation signals. The interface signals with different signal attributes are converted into signals with the same attribute to be output, so that each interface signal outputs the same type of signal after being processed, and the output intercommunity of various interface signals is improved.
Description
Technical Field
The utility model relates to the technical field of unmanned aerial vehicles, in particular to an interface signal conversion circuit and an unmanned aerial vehicle.
Background
Along with the development of the intelligent control technology of unmanned remote flight, more and more unmanned aerial vehicle industries can be rapidly developed, and the appearance of the unmanned aerial vehicle provides a lot of convenience for the life of people, and is widely applied to various industries in the society.
However, unmanned aerial vehicle flies the brain of accuse as connecting all equipment, the interface kind is more and more, and the signal attribute of each kind of interface is different, leads to all being different to the data after each kind of signal processing, need correspond and add different signal processing device and receiving arrangement to in the processing to different signals, make unmanned aerial vehicle's manufacturing cost rise sharply, moreover, make unmanned aerial vehicle's weight aggravate, be not convenient for take-off fast and descend.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides an interface signal conversion circuit and an unmanned aerial vehicle, wherein the interface signal conversion circuit is used for improving the output intercommunity of various interface signals.
The purpose of the utility model is realized by the following technical scheme:
an interface signal conversion circuit comprising: a level conversion circuit and an interface protocol converter; a first data end of the level conversion circuit is used for receiving and transmitting an unmanned aerial vehicle operation signal, and a second data end of the level conversion circuit is connected with an input end of the interface protocol converter; the interface protocol converter comprises a first subconverter, a second subconverter and a third subconverter, wherein the input end of the first subconverter is used for receiving an unmanned aerial vehicle universal serial bus interface signal, the input end of the second subconverter is used for receiving an unmanned aerial vehicle serial peripheral interface signal, the input end of the third subconverter is used for receiving an unmanned aerial vehicle flash memory interface signal, the output end of the first subconverter, the output end of the second subconverter and the output end of the third subconverter are both used for outputting corresponding unmanned aerial vehicle pulse width modulation signals.
In one embodiment, the interface signal conversion circuit further includes a first resistor and a second resistor, a first end of the first resistor is used for being connected to a reference power supply, a second end of the first resistor is connected to the emulation data end of the first sub-converter, the emulation data end of the first sub-converter is used for receiving an emulation data signal, the emulation clock end of the first sub-converter is grounded through the second resistor, and the emulation clock end of the first sub-converter is used for receiving an emulation clock signal.
In one embodiment, the interface signal conversion circuit further includes a crystal oscillator, the first frequency modulation end of the third sub-converter is connected to the voltage end of the crystal oscillator, the output end of the crystal oscillator is connected to the second frequency modulation end of the third sub-converter, and the crystal oscillator is configured to provide an oscillation frequency for the flash interface signal.
In one embodiment, the interface signal conversion circuit further includes a first capacitor, a voltage terminal of the crystal oscillator is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is grounded.
In one embodiment, the interface signal conversion circuit further includes a second capacitor, an output terminal of the crystal oscillator is connected to a first terminal of the second capacitor, and a second terminal of the second capacitor is grounded.
In one embodiment, the interface protocol converter further includes a fourth sub-converter and a third resistor, a flash memory control terminal of the fourth sub-converter is configured to receive a flash memory control signal, a flash memory command input terminal of the fourth sub-converter is configured to receive a flash memory command signal, a first terminal of the third resistor is configured to be connected to an output terminal of a flash memory controller, and a second terminal of the third resistor is connected to the flash memory control terminal of the fourth sub-converter.
In one embodiment, the level shift circuit includes a bidirectional level shifter, a third capacitor, and a fourth capacitor, a first level shift terminal of the bidirectional level shifter is configured to receive the drone operation signal, a second level shift terminal of the bidirectional level shifter is connected to the operation transceiving terminal of the first sub-shifter, a first voltage terminal of the bidirectional level shifter is grounded through the third capacitor, and a second voltage terminal of the bidirectional level shifter is grounded through the fourth capacitor.
In one embodiment, the level shift circuit further includes a fourth resistor and an enable led, an output enable terminal of the bidirectional level shifter is connected to a first terminal of the fourth resistor, a second terminal of the fourth resistor is connected to an anode of the enable led, a cathode of the enable led is grounded, and the output enable terminal of the bidirectional level shifter is configured to receive an output enable signal.
In one embodiment, the level shift circuit further includes a fifth resistor, the first terminal of the fourth resistor is further connected to the first terminal of the fifth resistor, and the second terminal of the fourth resistor is grounded.
An unmanned aerial vehicle comprises the interface signal conversion circuit in any one of the above embodiments.
Compared with the prior art, the utility model has at least the following advantages:
after different interface signals are accessed, through the interface protocol converter that corresponds, convert the different interface signals of each signal attribute into the signal output of same attribute, unmanned aerial vehicle pulse width modulation signal promptly, make each kind of interface signal export the signal of the same type after handling, thereby make various interface signals handle through the same signal processing device, the output intercommunity of various different interface signals has been improved, be convenient for carry out the same signal processing to different interface signals, thereby unmanned aerial vehicle's manufacturing cost has been reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of an interface signal conversion circuit according to an embodiment.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to an interface signal conversion circuit. In one embodiment, the interface signal conversion circuit comprises a level conversion circuit and an interface protocol converter. The first data end of the level conversion circuit is used for receiving and transmitting the operation signal of the unmanned aerial vehicle, and the second data end of the level conversion circuit is connected with the input end of the interface protocol converter. The interface protocol converter includes a first sub-converter, a second sub-converter, and a third sub-converter. The input end of the first sub-converter is used for receiving the universal serial bus interface signal of the unmanned aerial vehicle. And the input end of the second sub-converter is used for receiving the serial peripheral interface signal of the unmanned aerial vehicle. And the input end of the third sub-converter is used for receiving flash memory interface signals of the unmanned aerial vehicle. The output end of the first sub-converter, the output end of the second sub-converter and the output end of the third sub-converter are all used for outputting corresponding unmanned aerial vehicle pulse width modulation signals. After different interface signals are accessed, through the interface protocol converter that corresponds, convert the different interface signals of each signal attribute into the signal output of same attribute, unmanned aerial vehicle pulse width modulation signal promptly, make each kind of interface signal export the signal of the same type after handling, thereby make various interface signals handle through the same signal processing device, the output intercommunity of various different interface signals has been improved, be convenient for carry out the same signal processing to different interface signals, thereby unmanned aerial vehicle's manufacturing cost has been reduced.
Please refer to fig. 1, which is a schematic structural diagram of an interface signal conversion circuit according to an embodiment of the present invention.
Interface signal conversion circuitry 10 of an embodiment includes level translation circuitry 100 and interface protocol converter U1. The first data terminal of the level shift circuit 100 is used for transceiving an operation signal of the unmanned aerial vehicle, and the second data terminal of the level shift circuit 100 is connected with the input terminal of the interface protocol converter U1. The interface protocol converter U1 includes a first sub-converter U1a, a second sub-converter U1b and a third sub-converter U1 c. The input end of the first sub-converter U1a is used for receiving a universal serial bus interface signal of the unmanned aerial vehicle. The input end of the second sub-converter U1b is used for receiving a serial peripheral interface signal of the unmanned aerial vehicle. The input end of the third subconverter U1c is used for receiving the flash memory interface signal of the drone. The output end of the first sub-converter U1a, the output end of the second sub-converter U1b, and the third sub-converter U1c are all configured to output a corresponding drone pulse width modulation signal at an output end.
In this embodiment, after different interface signal is accessed, through the interface protocol converter U1 that corresponds, convert the different interface signal of each signal attribute into the signal output of same attribute, unmanned aerial vehicle pulse width modulation signal promptly, make each kind of interface signal export the same type of signal after handling, thereby make various interface signal handle through the same signal processing device, the output intercommunity of various different interface signals has been improved, be convenient for carry out the same signal processing to different interface signals, thereby unmanned aerial vehicle's manufacturing cost has been reduced. The model of the interface protocol converter is STM32F407VET6, and the first sub-converter, the second sub-converter and the third sub-converter are three interface signal conversion modules of a single chip microcomputer STM32F407VET6 respectively.
In one embodiment, referring to fig. 1, the interface signal conversion circuit 10 further includes a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is configured to be connected to a reference power source, a second end of the first resistor R1 is connected to an emulation data terminal of the first sub-converter U1a, an emulation data terminal of the first sub-converter U1a is configured to receive an emulation data signal, an emulation clock terminal of the first sub-converter U1a is grounded through the second resistor R2, and an emulation clock terminal of the first sub-converter U1a is configured to receive an emulation clock signal. In this embodiment, the simulation data end of the first sub-converter U1a receives external simulation data, which includes simulation parameters and simulation control commands, so as to facilitate analysis of data sent by simulation software, and the simulation data end of the first sub-converter U1a is equivalent to an interface signal end for simulation data signals, and receives corresponding interface signals with the three interface signal ends, respectively. The signal received by the simulation clock end of the first sub-converter U1a is a simulation clock signal, the simulation clock signal corresponds to the simulation data signal, and the simulation clock signal provides a corresponding sampling frequency for the simulation data signal, so that the simulation data end of the first sub-converter U1a can accurately obtain simulation data. A resistor is connected to each of the simulation data terminal and the simulation clock terminal of the first sub-converter U1a, that is, the simulation data terminal of the first sub-converter U1a is connected to the first resistor R1, the simulation clock terminal of the first sub-converter U1a is connected to the second resistor R2, and the first resistor R1 is used as a pull-up resistor of the simulation data terminal of the first sub-converter U1a, so as to increase the voltage for acquiring the simulation data; the second resistor R2 is further grounded, so that the current flowing into the simulation clock terminal of the first sub-converter U1a is reduced, the simulation clock terminal of the first sub-converter U1a is prevented from being burned out due to excessive current, and the simulation clock terminal of the first sub-converter U1a is further ensured to send out a sampling frequency in time, thereby ensuring the collection of simulation data.
In one embodiment, referring to fig. 1, the interface signal conversion circuit 10 further includes a crystal oscillator X1, the first frequency modulation terminal of the third sub-converter U1c is connected to the voltage terminal of the crystal oscillator X1, the output terminal of the crystal oscillator X1 is connected to the second frequency modulation terminal of the third sub-converter U1c, and the crystal oscillator X1 is configured to provide an oscillation frequency for the flash interface signal. In this embodiment, the crystal oscillator X1 provides the total sampling frequency for the interface signal conversion circuit through the third sub-converter U1c, that is, the crystal oscillator X1 provides the sampling frequency for the first sub-converter U1a, the second sub-converter U1b and the third sub-converter U1c at the same time, so as to facilitate accurate acquisition of each interface signal, and the crystal oscillator X1 is equivalent to a start-up and sampling frequency controller of the whole circuit.
Further, the interface signal conversion circuit 10 further includes a first capacitor C1, a voltage terminal of the crystal oscillator X1 is connected to a first terminal of the first capacitor C1, and a second terminal of the first capacitor C1 is grounded. In this embodiment, the first capacitor C1 filters the voltage input to the crystal oscillator X1, so as to ensure that the voltage applied to the crystal oscillator X1 is stable, thereby ensuring that the crystal oscillator X1 outputs a specified oscillation frequency. In order to ensure that the oscillation frequency output by the crystal oscillator X1 is stable, that is, the sampling frequency of the specified frequency is output, the interface signal conversion circuit further includes a second capacitor, the output terminal of the crystal oscillator X1 is connected to a first terminal of the second capacitor, and a second terminal of the second capacitor is grounded. The output frequency is filtered through the second capacitor, interference frequency in the output frequency is filtered, the output frequency is guaranteed to be stable sampling frequency, and therefore accurate sampling of interface signals by the interface signal conversion circuit is guaranteed. Wherein the model of the crystal oscillator is X201.
In one embodiment, referring to fig. 1, the interface protocol converter U1 further includes a fourth sub-converter U1d and a third resistor R3, a flash memory control terminal of the fourth sub-converter U1d is configured to receive a flash memory control signal, a flash memory command input terminal of the fourth sub-converter U1d is configured to receive a flash memory command signal, a first terminal of the third resistor R3 is configured to be connected to an output terminal of a flash memory controller, and a second terminal of the third resistor R3 is connected to the flash memory control terminal of the fourth sub-converter U1 d. In this embodiment, the third resistor R3 connects the fourth sub-converter U1d to the flash memory controller, that is, the third resistor R3 connects the flash memory control end of the fourth sub-converter U1d in series with the output end of the flash memory controller, and when the flash memory controller outputs a flash memory command, the third resistor R3 steps down the voltage of an external command signal, so as to avoid an excessive voltage of a flash memory command signal input to the fourth sub-converter U1d, and ensure that the fourth sub-converter U1d operates normally, thereby ensuring the acquisition control of the flash memory interface signal of the drone. The fourth sub-converter is an interface signal conversion module used for receiving and controlling flash memory signals in the single chip microcomputer STM32F407VET 6.
In one embodiment, referring to fig. 1, the level shifter circuit 100 includes a bidirectional level shifter U2, a third capacitor C3, and a fourth capacitor C4, a first level shifter terminal of the bidirectional level shifter U2 is configured to receive a drone operation signal, a second level shifter terminal of the bidirectional level shifter U2 is connected to the operation transceiver terminal of the first sub-shifter U1a, a first voltage terminal of the bidirectional level shifter U2 is grounded through the third capacitor C3, and a second voltage terminal of the bidirectional level shifter U2 is grounded through the fourth capacitor C4. In this embodiment, the level of two-way level converter U2 with unmanned aerial vehicle operation signal is converted, realizes converting the high signal into the low signal, reduces the voltage amplitude of unmanned aerial vehicle operation signal promptly, is convenient for input unmanned aerial vehicle operation signal after comparing step-down conversion in the first sub-converter U1a, and third electric capacity C3 and fourth electric capacity C4 is right respectively the first voltage end and the second voltage end of two-way level converter U2 filter, ensure that the voltage signal of output is stable. Wherein the bidirectional level shifter is TXS0102 in model number.
Further, the level shift circuit 100 further includes a fourth resistor R4 and an enable led D1, the output enable terminal of the bi-directional level shifter U2 is connected to the first terminal of the fourth resistor R4, the second terminal of the fourth resistor R4 is connected to the anode of the enable led D1, the cathode of the enable led D1 is grounded, and the output enable terminal of the bi-directional level shifter U2 is configured to receive an output enable signal. In this embodiment, the fourth resistor R4 is connected in series with the enabling led D1, the output enable terminal of the bi-directional level shifter U2 is triggered at a high level, after the bi-directional level shifter U2 is triggered to turn on, the output enable terminal of the bi-directional level shifter U2 outputs a voltage, so that the enabling led D1 is turned on and emits light to send an instruction to an operator to start work, and the fourth resistor R4 pulls up the voltage at the output enable terminal of the bi-directional level shifter U2 to ensure that the output enable terminal of the bi-directional level shifter U2 outputs a high level. In another embodiment, the level shift circuit 100 further includes a fifth resistor R5, the first terminal of the fourth resistor R4 is further connected to the first terminal of the fifth resistor R5, and the second terminal of the fourth resistor R4 is grounded. The fifth resistor R5 shunts the current on the output enable terminal of the bi-directional level shifter U2, so that the current flowing into the enable terminal of the bi-directional level shifter U2 is prevented from being too large, and the normal operation of the bi-directional level shifter U2 is ensured.
The application also provides an unmanned aerial vehicle, which comprises the interface signal conversion circuit in any one of the above embodiments. In this embodiment, the interface signal conversion circuit includes a level conversion circuit and an interface protocol converter. The first data end of the level conversion circuit is used for receiving and transmitting the operation signal of the unmanned aerial vehicle, and the second data end of the level conversion circuit is connected with the input end of the interface protocol converter. The interface protocol converter includes a first sub-converter, a second sub-converter, and a third sub-converter. The input end of the first sub-converter is used for receiving the universal serial bus interface signal of the unmanned aerial vehicle. And the input end of the second sub-converter is used for receiving the serial peripheral interface signal of the unmanned aerial vehicle. And the input end of the third sub-converter is used for receiving flash memory interface signals of the unmanned aerial vehicle. The output end of the first sub-converter, the output end of the second sub-converter and the output end of the third sub-converter are all used for outputting corresponding unmanned aerial vehicle pulse width modulation signals. After different interface signals are accessed, through the interface protocol converter that corresponds, convert the different interface signals of each signal attribute into the signal output of same attribute, unmanned aerial vehicle pulse width modulation signal promptly, make each kind of interface signal export the signal of the same type after handling, thereby make various interface signals handle through the same signal processing device, the output intercommunity of various different interface signals has been improved, be convenient for carry out the same signal processing to different interface signals, thereby unmanned aerial vehicle's manufacturing cost has been reduced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An interface signal conversion circuit, comprising: a level conversion circuit and an interface protocol converter;
a first data end of the level conversion circuit is used for receiving and transmitting an unmanned aerial vehicle operation signal, and a second data end of the level conversion circuit is connected with an input end of the interface protocol converter;
the interface protocol converter comprises a first subconverter, a second subconverter and a third subconverter, wherein the input end of the first subconverter is used for receiving an unmanned aerial vehicle universal serial bus interface signal, the input end of the second subconverter is used for receiving an unmanned aerial vehicle serial peripheral interface signal, the input end of the third subconverter is used for receiving an unmanned aerial vehicle flash memory interface signal, the output end of the first subconverter, the output end of the second subconverter and the output end of the third subconverter are both used for outputting corresponding unmanned aerial vehicle pulse width modulation signals.
2. The interface signal converting circuit according to claim 1, further comprising a first resistor and a second resistor, wherein a first end of the first resistor is configured to be connected to a reference power supply, a second end of the first resistor is connected to the emulation data terminal of the first sub-converter, the emulation data terminal of the first sub-converter is configured to receive an emulation data signal, the emulation clock terminal of the first sub-converter is grounded through the second resistor, and the emulation clock terminal of the first sub-converter is configured to receive an emulation clock signal.
3. The interface signal converting circuit according to claim 1, further comprising a crystal oscillator, wherein the first frequency modulation terminal of the third sub-converter is connected to the voltage terminal of the crystal oscillator, the output terminal of the crystal oscillator is connected to the second frequency modulation terminal of the third sub-converter, and the crystal oscillator is configured to provide an oscillating frequency for the flash interface signal.
4. The interface signal converting circuit according to claim 3, further comprising a first capacitor, wherein a voltage terminal of the crystal oscillator is connected to a first terminal of the first capacitor, and a second terminal of the first capacitor is grounded.
5. The interface signal conversion circuit according to claim 3, further comprising a second capacitor, wherein the output terminal of the crystal oscillator is connected to a first terminal of the second capacitor, and a second terminal of the second capacitor is grounded.
6. The interface signal converting circuit according to claim 1, wherein the interface protocol converter further comprises a fourth sub-converter and a third resistor, a flash memory control terminal of the fourth sub-converter is configured to receive the flash memory control signal, a flash memory command input terminal of the fourth sub-converter is configured to receive the flash memory command signal, a first terminal of the third resistor is configured to be connected to the output terminal of the flash memory controller, and a second terminal of the third resistor is connected to the flash memory control terminal of the fourth sub-converter.
7. The interface signal conversion circuit according to claim 1, wherein the level conversion circuit includes a bidirectional level converter, a third capacitor, and a fourth capacitor, a first level conversion terminal of the bidirectional level converter is configured to receive the drone operation signal, a second level conversion terminal of the bidirectional level converter is connected to the operation transceiving terminal of the first sub-converter, a first voltage terminal of the bidirectional level converter is grounded through the third capacitor, and a second voltage terminal of the bidirectional level converter is grounded through the fourth capacitor.
8. The interface signal conversion circuit according to claim 7, wherein the level conversion circuit further comprises a fourth resistor and an enable led, an output enable terminal of the bidirectional level converter is connected to a first terminal of the fourth resistor, a second terminal of the fourth resistor is connected to an anode of the enable led, a cathode of the enable led is grounded, and the output enable terminal of the bidirectional level converter is configured to receive an output enable signal.
9. The interface signal converting circuit according to claim 8, wherein the level shifter circuit further comprises a fifth resistor, a first terminal of the fourth resistor is further connected to a first terminal of the fifth resistor, and a second terminal of the fourth resistor is grounded.
10. A drone, comprising an interface signal conversion circuit according to any one of claims 1 to 9.
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| CN202120923313.XU CN215871364U (en) | 2021-04-29 | 2021-04-29 | Interface signal conversion circuit and unmanned aerial vehicle |
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| CN202120923313.XU CN215871364U (en) | 2021-04-29 | 2021-04-29 | Interface signal conversion circuit and unmanned aerial vehicle |
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