Signal transmission equipment and system

Abstract

The utility model discloses a signal transmission device and system, and relates to the field of computers. The signal transmission device comprises a signal switching circuit, a USB to serial port circuit, a program programming circuit and a signal output interface. The first end of the signal switching circuit is suitable for being connected with an upper computer, the second end of the signal switching circuit is connected with the input end of the USB to serial port circuit, the third end of the signal switching circuit is connected with the input end of the program programming circuit, and the signal switching circuit is used for switching and controlling the USB to serial port circuit or the program programming circuit to be communicated with the upper computer. The output end of the USB to serial port circuit and the output end of the program programming circuit are connected with the input interface of the photovoltaic tracker through the signal output interface. The output end of the USB to serial port circuit and the output end of the program programming circuit are connected with the input interface of the photovoltaic tracker through the signal output interface, and the photovoltaic tracker is only provided with one input interface, so that the hardware cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of computers, and in particular to a signal transmission device and system. Background Art

[0002] Photovoltaic trackers are used to control photovoltaic brackets to follow the movement of the sun, so that the photovoltaic panels on the tracking photovoltaic brackets are always facing the sun to obtain the maximum power generation benefits. Before the photovoltaic tracker is put into use, engineers usually need to use program burning equipment to burn the program of the photovoltaic tracker, and use debugging equipment to debug the photovoltaic tracker.

[0003] In the related art, the program burning device and the debugging device are two independent devices. When the program burning device is connected to the international standard test protocol (joint test action group, JTAG) interface of the photovoltaic tracker, the program burning device can burn the program of the photovoltaic tracker. When the debugging device is connected to the DB9 (D-subminiature extended 9-pin) interface of the photovoltaic tracker, the debugging device can debug the photovoltaic tracker.

[0004] However, the photovoltaic tracker needs to have two interfaces, DB9 and JTAG, which results in high hardware costs. Utility Model Content

[0005] The utility model provides a signal transmission device and system, which can solve the problem of high hardware cost in related technologies. The technical solution includes:

[0006] On the one hand, a signal transmission device is provided, the signal transmission device comprising: a signal switching circuit, a USB (universal serial bus) to serial port circuit, a program burning circuit and a signal output interface;

[0007] The first end of the signal switching circuit is suitable for connecting to the host computer, the second end of the signal switching circuit is connected to the input end of the USB to serial port circuit, and the third end of the signal switching circuit is connected to the input end of the program burning circuit, and is used to switch and control the USB to serial port circuit or the program burning circuit to be connected to the host computer;

[0008] The output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface.

[0009] Optionally, the signal switching circuit is a two-speed DIP switch.

[0010] Optionally, the signal output interface includes: a first signal output sub-interface; the signal transmission device also includes a connecting line;

[0011] One end of the connecting line is connected to the output end of the USB to serial port circuit and the output end of the program burning circuit;

[0012] The other end of the connecting line is connected to the input end of the first signal output sub-interface;

[0013] The output end of the first signal output sub-interface is suitable for connecting to the input interface of the photovoltaic tracker.

[0014] Optionally, the signal output interface further includes: a second signal output sub-interface;

[0015] The input end of the second signal output sub-interface is connected to the output end of the USB to serial port circuit and the output end of the program burning circuit respectively;

[0016] The output end of the second signal output sub-interface is connected to one end of the connecting line.

[0017] Optionally, the first signal output sub-interface includes: a first connection terminal, a second connection terminal and a first power terminal; the second signal output sub-interface includes: a first wiring terminal, a second wiring terminal and a second power terminal;

[0018] One end of the first wiring terminal is connected to the output end of the USB-to-serial port circuit, the other end of the first wiring terminal is connected to one end of the first connection terminal through a connecting line, and the other end of the first connection terminal is connected to the first serial port terminal of the input interface of the photovoltaic tracker;

[0019] One end of the second wiring terminal is connected to the output end of the program burning circuit, the other end of the second wiring terminal is connected to one end of the second connection terminal through a connecting line, and the other end of the second connection terminal is connected to the second serial port terminal of the input interface of the photovoltaic tracker;

[0020] The second power terminal is connected to one end of the first power terminal through a connecting line, and the other end of the first power terminal is connected to the power terminal of the input interface of the photovoltaic tracker.

[0021] Optionally, the signal transmission device further includes: a signal input interface;

[0022] The input end of the signal input interface is suitable for connecting to a host computer and is used to receive a USB signal transmitted by the host computer;

[0023] The output end of the signal input interface is connected to the first end of the signal switching circuit.

[0024] Optionally, the USB to serial port circuit comprises: a first level conversion circuit and a second level conversion circuit;

[0025] The input end of the first level conversion circuit is connected to the second end of the signal switching circuit, and the output end of the first level conversion circuit is connected to the input end of the second level conversion circuit, for converting the USB signal into a TTL (transistor-transistor logic) signal;

[0026] The output end of the second level conversion circuit is connected to the photovoltaic tracker, and is used to convert the TTL signal into a serial port signal received by the photovoltaic tracker.

[0027] Optionally, the first level conversion circuit is a USB to TTL circuit, and the second level conversion circuit is a TTL to RS232 circuit.

[0028] Optionally, the signal transmission device further includes an indication component, and the indication component is used to indicate whether the program burning is completed.

[0029] On the other hand, a signal transmission system is provided, which includes: a host computer, a photovoltaic tracker and the above-mentioned signal transmission device.

[0030] In summary, the utility model provides a signal transmission device and system, which includes a signal switching circuit, a USB to serial port circuit, a program burning circuit and a signal output interface. Among them, the first end of the signal switching circuit is suitable for connecting to a host computer, the second end of the signal switching circuit is connected to the input end of the USB to serial port circuit, and the third end of the signal switching circuit is connected to the input end of the program burning circuit. The output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface. Since the output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface, compared with the related art, the photovoltaic tracker only needs to set up one input interface, thereby reducing the hardware cost.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a signal transmission system provided by an embodiment of the utility model;

[0033] Figure 2 It is a structural schematic diagram of a signal transmission device provided by an embodiment of the utility model;

[0034] Figure 3 It is a structural schematic diagram of a signal switching circuit provided by an embodiment of the utility model;

[0035] Figure 4 It is a structural schematic diagram of another signal transmission device provided by an embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the structure of a USB to serial port circuit provided by an embodiment of the utility model;

[0037] Figure 6 It is a structural schematic diagram of a program burning circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Figure 1 is a schematic diagram of the structure of a signal transmission system provided by an embodiment of the utility model, such as Figure 1 As shown, the signal transmission system 100 includes a host computer 10, a signal transmission device 20 and a photovoltaic tracker 30. The host computer 10 is connected to the photovoltaic tracker 30 through the signal transmission device 20.

[0040] Figure 2 is a schematic diagram of the structure of a signal transmission device provided by an embodiment of the utility model, such as Figure 2 As shown, the signal transmission device 20 includes a signal switching circuit 21 , a USB to serial port circuit 22 , a program burning circuit 23 and a signal output interface 24 .

[0041] Among them, the first end of the signal switching circuit 21 is suitable for connecting to the host computer 10, the second end of the signal switching circuit 21 is connected to the input end of the USB to serial port circuit 22, and the third end of the signal switching circuit 21 is connected to the input end of the program burning circuit 23, which is used to switch and control the USB to serial port circuit 22 or the program burning circuit 23 to be connected to the host computer 10.

[0042] The output end of the USB-to-serial port circuit 22 and the output end of the program burning circuit 23 are both connected to the input interface of the photovoltaic tracker 30 through the signal output interface 24 .

[0043] When the second end of the signal switching circuit 21 is connected to the input end of the USB to serial port circuit 22, the host computer 10 can debug the photovoltaic tracker 30 through the USB to serial port circuit 22, for example, check and set the parameters of the photovoltaic tracker 30. When the third end of the signal switching circuit 21 is connected to the input end of the program burning circuit 23, the host computer 10 can burn the program of the photovoltaic tracker 30 through the program burning circuit 23.

[0044] In summary, the utility model provides a signal transmission device, which includes a signal switching circuit, a USB to serial port circuit, a program burning circuit and a signal output interface. Among them, the first end of the signal switching circuit is suitable for connecting to a host computer, the second end of the signal switching circuit is connected to the input end of the USB to serial port circuit, and the third end of the signal switching circuit is connected to the input end of the program burning circuit. The output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface. Since the output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface, compared with the related art, the photovoltaic tracker only needs to set up one input interface, thereby reducing the hardware cost.

[0045] In addition, by integrating the USB-to-serial port circuit and the program burning circuit in the signal transmission device, engineers only need to carry one signal transmission device during the process of program burning and debugging the photovoltaic tracker. During the debugging of the photovoltaic tracker, the USB-to-serial port circuit is controlled to be connected to the host computer through the signal switching circuit. During the program burning of the photovoltaic tracker, the program burning circuit is controlled to be connected to the host computer through the signal switching circuit, thereby debugging and program burning of the photovoltaic tracker can be realized. In addition, during the process of program burning and debugging of the photovoltaic tracker, there is no need to manually replace the device connected to the photovoltaic tracker, which improves the efficiency of program burning and debugging of the photovoltaic tracker.

[0046] In some embodiments of the present invention, the signal switching circuit 21 can be a two-speed DIP switch. For example, the two-speed DIP switch can be a 6-pin 2-speed DIP selection switch. When the two-speed DIP switch is turned to the 1st gear, the signal switching circuit 21 is connected to the USB to serial port circuit 22. When the two-speed DIP switch is turned to the 2nd gear, the signal switching circuit 21 is connected to the program burning circuit 23.

[0047] refer to Figure 3The signal switching circuit 21 may include a first signal receiving positive pin Stlink+ and a first signal receiving negative pin Stlink-, a first USB signal positive pin D1+, a first USB signal negative pin D1-, a first program burning positive pin W+, and a first program burning negative pin W-.

[0048] Among them, the first signal receiving positive pin Stlink+ and the first signal receiving negative pin Stlink- as the first ends of the signal switching circuit 21 are both suitable for connecting to the host computer 10.

[0049] The first USB signal positive electrode pin D1+ and the first USB signal negative electrode pin D1 − as the second ends of the signal switching circuit 21 are both connected to the input end of the USB-to-serial port circuit 22 .

[0050] The first program burning positive pin W+ and the first program burning negative pin W− as the third end of the signal switching circuit 21 are both connected to the input end of the program burning circuit 23 .

[0051] When the two-speed dial switch is turned to the 1st gear, the first USB signal positive pin D1+ is connected to the first signal receiving positive pin Stlink+, and the first USB signal negative pin D1- is connected to the first signal receiving negative pin Stlink-. In this way, the host computer 10 is connected to the USB to serial port circuit 22, so that the host computer 10 can debug the photovoltaic tracker 30 through the USB to serial port circuit 22.

[0052] When the two-speed dial switch is turned to the 2nd gear, the first program burning positive pin W+ is connected to the first signal receiving positive pin Stlink+, and the first program burning negative pin W- is connected to the first signal receiving negative pin Stlink-, thereby realizing the connection between the host computer 10 and the program burning circuit 23, so that the host computer 10 performs program burning on the photovoltaic tracker 30 through the program burning circuit 23.

[0053] In some embodiments of the present invention, reference Figure 4 The signal output interface 24 may include a first signal output sub-interface 241, and the signal transmission device 20 may further include a connecting line 25. The connecting line 25 may be used to transmit signals. The length of the connecting line may be set according to actual conditions.

[0054] One end of the connection line 25 is connected to the output end of the USB-to-serial port circuit 22 and the output end of the program burning circuit 23 . The other end of the connection line 25 is connected to the input end of the first signal output sub-interface 241 .

[0055] The output end of the first signal output sub-interface 241 is suitable for connecting to the input interface of the photovoltaic tracker 30 .

[0056] In some embodiments of the present invention, reference Figure 4 The signal output interface 24 may further include a second signal output sub-interface 242 .

[0057] The input end of the second signal output sub-interface 242 is respectively connected to the output end of the USB-to-serial port circuit 22 and the output end of the program burning circuit 23. The output end of the second signal output sub-interface 242 is connected to one end of the connecting line 25.

[0058] In some embodiments of the present invention, reference Figure 4 The first signal output sub-interface 241 may include a first connection terminal H1, a second connection terminal H2, and a first power terminal V1. The second signal output sub-interface 242 may include a first connection terminal P1, a second connection terminal P2, and a second power terminal V2.

[0059] Among them, one end of the first terminal P1 is connected to the output end of the USB to serial port circuit 22, the other end of the first terminal P1 is connected to one end of the first connection terminal H1 through the connecting line 25, and the other end of the first connection terminal H1 is connected to the first serial port terminal S1 of the input interface of the photovoltaic tracker 30.

[0060] One end of the second terminal P2 is connected to the output end of the program burning circuit 23, the other end of the second terminal P2 is connected to one end of the second connection terminal H2 through the connecting line 25, and the other end of the second connection terminal H2 is connected to the second serial port terminal S2 of the input interface of the photovoltaic tracker 30.

[0061] The second power terminal V2 is connected to one end of the first power terminal V1 through a connecting line 25 , and the other end of the first power terminal V1 is connected to a power terminal V3 of an input interface of the photovoltaic tracker 30 .

[0062] In the embodiment of the present invention, the first connection terminal H1, the second connection terminal H2, the first wiring terminal P1, the second wiring terminal P2, the first serial port terminal S1 and the second serial port terminal S2 may all be two.

[0063] One end of the two first connection terminals P1 is connected to the output end of the USB to serial port circuit 22, and the other end of the two first connection terminals P1 is connected to one end of the two first connection terminals H1 through the connection line 25. The other end of the two first connection terminals H1 is connected to the two first serial port terminals S1 in a one-to-one correspondence.

[0064] One end of the two second connection terminals P2 is connected to the output end of the program burning circuit 23, and the other end of the two second connection terminals P2 is connected to one end of the two second connection terminals H2 through the connecting line 25, and the other end of the two second connection terminals H2 is connected to the two second serial port terminals S2 one by one.

[0065] The first signal output sub-interface 241 may further include a first grounding terminal G1. The second signal output sub-interface 242 may include a second grounding terminal G2. The first grounding terminal G1, the second grounding terminal G2, and the third grounding terminal G3 of the input interface of the photovoltaic tracker 30 are all grounded.

[0066] The signal transmission device 20 may further include a first voltage-dividing resistor and a second voltage-dividing resistor, one end of the first voltage-dividing resistor is respectively connected to one end of a second terminal P2 and the output end of the program burning circuit 23, and the other end of the first voltage-dividing resistor is connected to the second power supply terminal V2.

[0067] One end of the second voltage-dividing resistor is connected to one end of another second wiring terminal P2 and the output end of the program burning circuit 23 respectively, and the other end of the second voltage-dividing resistor is connected to the second grounding terminal G2.

[0068] In some embodiments of the present invention, reference Figure 4 The signal transmission device 20 may further include a signal input interface 26. Optionally, the signal input interface 26 may be a universal serial bus interface, for example, the universal serial bus interface may be Standard type-A or Mini type-A or Micro type-A or Standard type-B or Mini type-B or Micro type-B or type-C, etc.

[0069] The input end of the signal input interface 26 is suitable for connecting to the host computer 10, and is used to receive the USB signal transmitted by the host computer 10. The output end of the signal input interface 26 is connected to the first end of the signal switching circuit 21.

[0070] Optionally, the signal input interface 26 may include a third power terminal, a fourth ground terminal, a second USB signal positive electrode pin D2+ and a second USB signal negative electrode pin D2 −.

[0071] The third power terminal is connected to a power supply providing 5V voltage, and the fourth ground terminal is used for grounding. The second USB signal positive pin D2+ is connected to the first signal receiving positive pin Stlink+ of the signal switching circuit 21 and the USB signal positive pin of the output interface of the host computer 10 respectively.

[0072] The second USB signal negative pin D2- is connected to the first signal receiving negative pin Stlink- of the signal switching circuit 21 and the USB signal negative pin of the output interface of the host computer 10, and is used to receive the USB signal transmitted by the host computer 10 and send the USB signal to the signal switching circuit 21.

[0073] In the embodiment of the utility model, the signal transmission circuit 20 may further include a signal transmission line, one end of which is connected to the first end of the signal switching circuit 21, and the other end of which is connected to the output end of the signal input interface 26. The length of the signal transmission line may be set according to actual conditions.

[0074] In some embodiments of the present invention, reference Figure 4 The USB-to-serial port circuit 22 may include a first level conversion circuit 221 and a second level conversion circuit 222 .

[0075] The input end of the first level conversion circuit 221 is connected to the second end of the signal switching circuit 21 , and the output end of the first level conversion circuit 221 is connected to the input end of the second level conversion circuit 222 , for converting the USB signal into a TTL signal.

[0076] refer to Figure 5 The input end of the first level conversion circuit 221 includes a third USB signal positive pin UD+ and a third USB signal negative pin UD-, the third USB signal positive pin UD+ is connected to the first USB signal positive pin D+, and the third USB signal negative pin UD- is connected to the first USB signal negative pin D-.

[0077] The output end of the second level conversion circuit 222 is connected to the photovoltaic tracker 30 , and is used to convert the TTL signal into a serial port signal received by the photovoltaic tracker 30 .

[0078] When the second end of the signal switching circuit 21 is connected to the input end of the first level conversion circuit 221, the first level conversion circuit 221 is connected to the host computer 10. The first level conversion circuit 221 can receive the USB signal sent by the host computer 10, and convert the USB signal sent by the host computer 10 into a TTL signal and send it to the second level conversion circuit 222. After receiving the TTL signal, the second level conversion circuit 222 converts the TTL signal into a serial port signal received by the photovoltaic tracker 30, and sends the serial port signal to the photovoltaic tracker 30.

[0079] In some embodiments of the present invention, the first level conversion circuit 221 may be a USB to TTL circuit, and the second level conversion circuit 222 may be a TTL to RS232 circuit.

[0080] refer to Figure 5 The first level conversion circuit 221 may include a CH340G USB-TTL conversion chip, and the second level conversion circuit 222 may include a SP3232 TTL-RS232 conversion chip.

[0081] refer to Figure 4 and Figure 5 The CH340G USB-TTL conversion chip may include a third USB signal positive pin UD+, a third USB signal negative pin UD-, and a serial data output pin TXD. The SP3232 TTL-RS232 conversion chip may include a transmitter first input pin T2IN, a transmitter first output pin T1OUT, and a transmitter second output pin T2OUT.

[0082] The serial data output pin TXD is connected to the first input pin T2IN of the transmitter, the first output pin T1OUT of the transmitter is connected to one end of a first wiring terminal P1, and the second output pin T2OUT of the transmitter is connected to one end of another first wiring terminal P1.

[0083] The first level conversion circuit 221 can send the TTL level signal to the transmitter first input pin T2IN through the serial data output pin TXD, and the second level conversion circuit 222 can send the serial port signal to the photovoltaic tracker 30 through the transmitter first output pin T1OUT and the transmitter second output pin T2OUT.

[0084] In some embodiments of the present invention, the signal transmission device 20 may further include an indicator component, which is used to indicate whether the program burning is completed. For example, the indicator component may be a flashing light, and if the indicator light is in a flashing state, it may indicate that the host computer 10 has completed the program burning of the photovoltaic tracker 30.

[0085] It can be understood that when the third end of the signal switching circuit 21 is connected to the input end of the program burning circuit 23, the host computer 10 can program the photovoltaic tracker 30 through the program burning circuit 23. The host computer 10 can select the firmware to be burned, burn the firmware into the photovoltaic tracker 30 through the program burning circuit 23, and can determine whether the program burning is completed through the indication component.

[0086] In the embodiment of the present utility model, reference Figure 6 The program burning circuit 23 may include a single chip microcomputer, which may be a STM32F103C8T6 single chip microcomputer. The STM32F103C8T6 single chip microcomputer may include a zeroth input and output pin PA0 to a fourteenth input and output pin PA14.

[0087] The first program burning positive pin W+ is connected to the eleventh input-output pin PA11 of the program burning circuit 23, the first program burning negative pin W- is connected to the twelfth input-output pin PA12. The thirteenth input-output pin PA13 is connected to a second wiring terminal P2, and the fourteenth input-output pin PA14 is connected to another second wiring terminal P2.

[0088] When the third terminal of the signal switching circuit 21 is connected to the input terminal of the program burning circuit 23 , the program burning circuit 23 is connected to the host computer 10 , and the program burning circuit 23 receives the firmware sent by the host computer 10 .

[0089] In some embodiments of the present invention, reference Figure 5 , the first level conversion circuit 221 may also include a first capacitor C1 to a fourth capacitor C4, and a crystal Y1. The CH340G USB-TTL conversion chip may also include a first power pin VCC1, a first ground pin GND1, an enable pin RS2323, a first contact output signal pin RTS#, a second contact output signal pin DTR#, a first contact input signal pin DCD#, a second contact input signal pin RI#, a third contact input signal pin DSR#, a fourth contact input signal pin CTS#, a second power pin V4, a first power Vo, a crystal oscillator input pin XI, and a crystal oscillator output pin XO.

[0090] The first power pin VCC1 is connected to a power supply providing a 3.3V voltage, one end of the first capacitor C1 is connected to the first power pin VCC1, and the other end of the first capacitor C1 is grounded. The first ground pin GND1 is grounded.

[0091] One end of the second capacitor C2 is connected to the second power pin V4 and the first power source Vo respectively, and the other end of the second capacitor C2 is grounded.

[0092] One end of the crystal Y1 is connected to the input pin X1 and one end of the fourth capacitor C4 respectively, and the other end of the crystal Y1 is connected to the output pin X0 and one end of the third capacitor C3 respectively. The other end of the third capacitor C3 and the other end of the fourth capacitor C4 are both grounded.

[0093] In some embodiments of the present invention, reference Figure 4The second level conversion circuit 222 may also include a fifth capacitor C5 to a ninth capacitor C9, and the SP3232 TTL-RS232 conversion chip may also include a first capacitor positive pin C1+, a first capacitor negative pin C1-, a second capacitor positive pin C2+, a second capacitor negative pin C2-, a transmitter second input pin T1IN, a receiver first input pin R1IN, a receiver second input pin R2IN, a receiver first output pin R1OUT, a receiver second output pin R2OUT, a third power pin VCC2, a fourth power pin VDD1, a fifth power pin VEE1 and a second ground pin GND2.

[0094] One end of the fifth capacitor C5 is connected to the first capacitor positive electrode pin C1+, and the other end of the fifth capacitor C5 is connected to the first capacitor negative electrode pin C1-. One end of the sixth capacitor C6 is connected to the fourth power supply pin VDD1, and the other end of the sixth capacitor C6 is grounded.

[0095] One end of the seventh capacitor C7 is connected to the second capacitor positive electrode pin C2+, and the other end of the seventh capacitor C7 is connected to the second capacitor negative electrode pin C2-. One end of the eighth capacitor C8 is connected to the fifth power supply pin VEE1, and the other end of the eighth capacitor C8 is grounded. One end of the ninth capacitor C9 is connected to the third power supply pin VCC2, and the other end of the ninth capacitor C9 is grounded. The third power supply pin VCC2 is also connected to a power supply providing a 3.3V voltage. The first input pin T1IN of the transmitter is grounded, and the second output pin R2OUT of the receiver is connected to the serial data input pin RXD.

[0096] In some embodiments of the present invention, reference Figure 5 The program burning circuit 23 may include a first resistor R1 to an eighth resistor R8, a tenth capacitor C10, a first diode LED1 and a second diode LED2.

[0097] The STM32F103C8T6 microcontroller can also include a fifteenth input and output pin PA15, a zeroth general-purpose pin PBO to a fifteenth general-purpose pin PB15, an external oscillator input pin OSC_IN, an external oscillator output pin OSC_OUT, a sixteenth input and output pin BOOT0, an asynchronous reset pin NRST, a battery pin VBAT, a sixth power pin VDD_1, a seventh power pin VDD_2, an eighth power pin VDD_3, a ninth power pin VDDA, an intrusion detection pin PC13-TAMPER-RTC, a seventeenth input and output pin PC14-0SC32_IN, an eighteenth input and output pin PC15-0SC32_OUT, a tenth power pin VSS_1, an eleventh power pin VSS_2, a twelfth power pin VSS_3 and a thirteenth power pin VSSA.

[0098] One end of the first resistor R1 is connected to a power supply providing a 3.3V voltage, and the other end of the first resistor R1 is connected to the zeroth input-output pin PA0. One end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end of the second resistor R2 is grounded. One end of the third resistor R3 is connected to the ninth input-output pin PA9, and the other end of the third resistor R3 is connected to the cathode of the second diode LED2.

[0099] The anode of the second diode LED2 is connected to a power supply providing a voltage of 3.3 V. The anode of the first diode LED1 is connected to the ninth input-output pin PA9, the cathode of the first diode LED1 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, the other end of the fourth resistor R4 and one end of the fifth resistor R5 are also grounded. The other end of the fifth resistor R5 is connected to the sixteenth input-output pin BOOT0.

[0100] One end of the tenth capacitor C10 is grounded, and the other end is connected to the asynchronous reset pin NRST. One end of the sixth resistor R6 is connected to the asynchronous reset pin NRST, and the other end is connected to a power supply providing a 3.3V voltage. The battery pin VBAT, the sixth power pin VDD_1, the seventh power pin VDD_2, the eighth power pin VDD_3, and the ninth power pin VDDA are all connected to a power supply providing a 3.3V voltage.

[0101] One end of the seventh resistor R7 is connected to the second general pin PB2, and the other end of the seventh resistor R7 is grounded. One end of the eighth resistor R8 is connected to the twelfth general pin PB12, and the other end of the eighth resistor R8 is connected to the fourteenth general pin PB14. The tenth power pin VSS_1, the eleventh power pin VSS_2, the twelfth power pin VSS_3 and the thirteenth power pin VSSA are all grounded.

[0102] In summary, the utility model provides a signal transmission device, which includes a signal switching circuit, a USB to serial port circuit, a program burning circuit and a signal output interface. Among them, the first end of the signal switching circuit is suitable for connecting to a host computer, the second end of the signal switching circuit is connected to the input end of the USB to serial port circuit, and the third end of the signal switching circuit is connected to the input end of the program burning circuit. The output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface. Since the output end of the USB to serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface, compared with the related art, the photovoltaic tracker only needs to set up one input interface, thereby reducing the hardware cost.

[0103] In addition, by integrating the USB-to-serial port circuit and the program burning circuit in the signal transmission device, engineers only need to carry one signal transmission device during the process of program burning and debugging the photovoltaic tracker. During the debugging of the photovoltaic tracker, the USB-to-serial port circuit is controlled to be connected to the host computer through the signal switching circuit. During the program burning of the photovoltaic tracker, the program burning circuit is controlled to be connected to the host computer through the signal switching circuit, thereby debugging and program burning of the photovoltaic tracker can be realized. During the program burning and debugging of the photovoltaic tracker, there is no need to manually replace the device connected to the photovoltaic tracker, which improves the efficiency of program burning and debugging of the photovoltaic tracker.

[0104] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0105] It should be understood that the various parts of the utility model can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0107] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0108] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the embodiments. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of the present invention, the word "multiple" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0109] In the present utility model, unless otherwise clearly specified or limited in the embodiments, the terms "install", "connect", "connect" and "fix" etc. appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific implementation situation.

[0110] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0111] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A signal transmission device, characterized in that: The signal transmission device includes: a signal switching circuit, a USB to serial port circuit, a program burning circuit and a signal output interface; Wherein, the first end of the signal switching circuit is suitable for connecting to a host computer, the second end of the signal switching circuit is connected to the input end of the USB to serial port circuit, and the third end of the signal switching circuit is connected to the input end of the program burning circuit, for switching and controlling the USB to serial port circuit or the program burning circuit to be connected to the host computer; The output end of the USB-to-serial port circuit and the output end of the program burning circuit are both connected to the input interface of the photovoltaic tracker through the signal output interface.

2. The signal transmission device according to claim 1, characterized in that: The signal switching circuit is a two-speed DIP switch.

3. The signal transmission device according to claim 2, characterized in that: The signal output interface includes: a first signal output sub-interface; the signal transmission device also includes a connecting line; One end of the connecting line is connected to the output end of the USB-to-serial port circuit and the output end of the program burning circuit; The other end of the connecting line is connected to the input end of the first signal output sub-interface; The output end of the first signal output sub-interface is suitable for connecting to the input interface of the photovoltaic tracker.

4. The signal transmission device according to claim 3, characterized in that: The signal output interface further comprises: a second signal output sub-interface; The input end of the second signal output sub-interface is connected to the output end of the USB-to-serial port circuit and the output end of the program burning circuit respectively; The output end of the second signal output sub-interface is connected to one end of the connecting line.

5. The signal transmission device according to claim 4, characterized in that: The first signal output sub-interface includes: a first connection terminal, a second connection terminal and a first power terminal; the second signal output sub-interface includes: a first wiring terminal, a second wiring terminal and a second power terminal; Wherein, one end of the first wiring terminal is connected to the output end of the USB-to-serial port circuit, the other end of the first wiring terminal is connected to one end of the first connection terminal through the connecting line, and the other end of the first connection terminal is connected to the first serial port terminal of the input interface of the photovoltaic tracker; One end of the second wiring terminal is connected to the output end of the program burning circuit, the other end of the second wiring terminal is connected to one end of the second connection terminal through the connecting line, and the other end of the second connection terminal is connected to the second serial port terminal of the input interface of the photovoltaic tracker; The second power terminal is connected to one end of the first power terminal through the connecting line, and the other end of the first power terminal is connected to the power terminal of the input interface of the photovoltaic tracker.

6. The signal transmission device according to any one of claims 1 to 5, characterized in that: The signal transmission device further comprises: a signal input interface; Wherein, the input end of the signal input interface is suitable for connecting to the host computer and is used to receive the USB signal transmitted by the host computer; The output end of the signal input interface is connected to the first end of the signal switching circuit.

7. The signal transmission device according to any one of claims 1 to 5, characterized in that: The USB to serial port circuit comprises: a first level conversion circuit and a second level conversion circuit; The input end of the first level conversion circuit is connected to the second end of the signal switching circuit, and the output end of the first level conversion circuit is connected to the input end of the second level conversion circuit, for converting the USB signal into a TTL signal; The output end of the second level conversion circuit is connected to the photovoltaic tracker, and is used to convert the TTL signal into a serial port signal received by the photovoltaic tracker.

8. The signal transmission device according to claim 7, characterized in that: The first level conversion circuit is a USB to TTL circuit, and the second level conversion circuit is a TTL to RS232 circuit.

9. The signal transmission device according to any one of claims 1 to 5, characterized in that: The signal transmission device further comprises an indication component, and the indication component is used to indicate whether the program burning is completed.

10. A signal transmission system, characterized in that: The signal transmission system comprises: A host computer, a photovoltaic tracker, and the signal transmission device as described in any one of claims 1 to 8.

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