Conveyor line terminal control device

Abstract

A conveyor line terminal control device, comprising a main control chip (1), a power supply circuit (2), a communication circuit (3), a motor drive circuit (4), and a photoelectric input circuit (8). The power supply circuit (2) has an input end connected to a power supply bus by means of a first piercing interface (20), and an output end configured to separately supply power to the main control chip (1), the communication circuit (3), the motor drive circuit (4), and the photoelectric input circuit (8). The communication circuit (3) has one end connected to a communication bus by means of a second piercing interface (30), and the other end connected to a communication port of the main control chip (1). The main control chip (1) is externally connected to a motor by means of the motor drive circuit (4). The main control chip (1) is externally connected to a photoelectric sensor by means of the photoelectric input circuit (8). Thus, integrated wiring for power supply and control can be realized, and the defects of separate wiring for power supply and control are overcome.

Description

A conveyor line terminal control device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2024202574207, filed with the Chinese Patent Office on January 31, 2024, entitled “A Conveyor Line Terminal Control Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of conveyor line control, and in particular to a conveyor line terminal control device. Background Art

[0004] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0005] With the continuous development of the logistics and warehousing industries, the storage capacity is getting larger and larger, the functions of automation equipment are becoming more and more perfect, and the demand for personalized transportation of conveyor lines is getting higher and higher. Therefore, the control of conveyor lines is also more complicated.

[0006] In the terminal control circuit of the prior art, the power supply and control circuits are independently set. Accordingly, during wiring, the power supply and control circuits are wired separately. However, this method will lead to problems such as a long construction period and messy on-site wiring. It also has high technical requirements for installation and maintenance personnel, increasing subsequent maintenance costs.

[0007] Public content

[0008] In order to address the deficiencies of the prior art, the present invention aims to provide a transmission line terminal control device that can overcome the defect of separate wiring for power supply and control.

[0009] In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

[0010] A conveyor line terminal control device, comprising:

[0011] Main control chip, power supply circuit, communication circuit, motor drive circuit and photoelectric input circuit;

[0012] The input end of the power supply circuit is connected to the power bus through the first puncture interface, and the output end is configured to supply power to the main control chip, the communication circuit, the motor drive circuit and the photoelectric input circuit respectively;

[0013] One end of the communication circuit is connected to the communication bus through the second puncture interface, and the other end is connected to the communication port of the main control chip;

[0014] The main control chip is connected to an external motor via the motor drive circuit;

[0015] The main control chip is externally connected to a photoelectric sensor via the photoelectric input circuit.

[0016] As an implementation manner, the power supply circuit is a single-stage voltage drop circuit or a multi-stage voltage drop circuit.

[0017] As an implementation manner, the communication circuit is a CAN communication circuit, and the communication bus is a CAN bus.

[0018] As an embodiment, the CAN communication circuit includes a CAN processing chip and a protection circuit. The CAN high and low level signals on the CAN bus are processed by the CAN processing chip and transmitted to the main control chip. The protection circuit includes a voltage regulator connected in parallel to the CAN high and low level connection ends and two groups of transient voltage suppression diodes connected in parallel to the CAN high and low level connection ends respectively.

[0019] As an embodiment, the motor drive circuit includes a gate drive circuit and an inverter circuit, the input end of the gate drive circuit is connected to the main control chip, the output end of the gate drive circuit is connected to the input end of the inverter circuit, and the output end of the inverter circuit is connected to the motor.

[0020] As an embodiment, the motor drive circuit also includes a voltage sampling circuit and a current sampling circuit. The voltage sampling circuit is configured to collect the power supply voltage of the motor and transmit it to the main control chip, and the current sampling circuit is configured to collect the current signal output by the inverter circuit and transmit it to the main control chip.

[0021] As an embodiment, the motor drive circuit further includes a Hall sampling circuit, the input end of the Hall sampling circuit is connected to the Hall signal interface of the motor, and the output end is connected to the main control chip.

[0022] As an embodiment, the conveyor line terminal control device further includes a peripheral circuit, the peripheral circuit includes a reset circuit, and the reset circuit is connected to the reset port of the main control chip.

[0023] As an embodiment, the conveyor line terminal control device further includes a peripheral circuit, and the peripheral circuit includes a crystal oscillator circuit, and the crystal oscillator circuit is connected to the clock port of the main control chip.

[0024] As an implementation method, the main control chip, power supply circuit, communication circuit, motor drive circuit, photoelectric input circuit and peripheral circuit are integrated into one.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) The conveyor line terminal control device provided by the present invention connects the input end of the power supply circuit to the power bus through the first puncture interface, uses the power supply circuit to power other circuits in the conveyor line terminal control device, and then uses a layout structure in which one end of the communication circuit is connected to the communication bus through the second puncture interface and the other end is connected to the communication port of the main control chip, thereby realizing the common wiring of power supply and control, and overcoming the defect of separate wiring of power supply and control in the prior art.

[0027] (2) The power supply circuit disclosed herein adopts a multi-stage step-down module, which can simultaneously power other circuits in the conveyor line terminal control device, thereby meeting the various power supply requirements of the main control chip and other circuits in the conveyor line terminal control device.

[0028] Advantages of additional aspects of the present disclosure will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute a part of the present disclosure, are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure.

[0030] FIG1 is a schematic diagram of the overall circuit structure of an embodiment of the present disclosure;

[0031] FIG2 is a circuit diagram of a primary buck module according to an embodiment of the present disclosure;

[0032] FIG3 is a circuit diagram of a two-stage buck module and a three-stage buck module according to an embodiment of the present disclosure;

[0033] FIG4 is a circuit diagram of a main control chip according to an embodiment of the present disclosure;

[0034] FIG5 is a circuit diagram of a communication circuit according to an embodiment of the present disclosure;

[0035] FIG6 is a circuit diagram of a gate driving circuit according to an embodiment of the present disclosure;

[0036] FIG7 is a circuit diagram of an inverter circuit according to an embodiment of the present disclosure;

[0037] FIG8 is a circuit diagram of a current sampling circuit according to an embodiment of the present disclosure;

[0038] FIG9 is a circuit diagram of a Hall sampling circuit according to an embodiment of the present disclosure;

[0039] FIG10 is a schematic diagram of a motor connection interface according to an embodiment of the present disclosure;

[0040] FIG11 is a circuit diagram of a photoelectric input circuit according to an embodiment of the present disclosure;

[0041] FIG12 is a schematic diagram of a debugging interface according to an embodiment of the present disclosure.

[0042] Among them, 1. Main control chip; 2. Power supply circuit; 20. First puncture interface; 21. First-stage buck module; 22. Second-stage buck module; 23. Third-stage buck module; 3. Communication circuit; 30. Second puncture interface; 4. Motor drive circuit; 41. Gate drive circuit; 42. Inverter circuit; 5. Motor connection interface; 6. Current sampling circuit; 7. Hall sampling circuit; 8. Photoelectric input circuit; 80. Photoelectric input interface; 9. Reset circuit; 10. Crystal oscillator circuit; 11. Debug interface. DETAILED DESCRIPTION

[0043] As shown in Figure 1, a conveyor line terminal control device includes: a main control chip 1, a power supply circuit 2, a motor drive circuit 4, and a photoelectric input circuit 8. The input end of the power supply circuit 2 is connected to the power bus through a first puncture interface 20, and the output end is configured to supply power to the main control chip 1, the communication circuit 3, the motor drive circuit 4, and the photoelectric input circuit 8 respectively. One end of the communication circuit 3 is connected to the communication bus through a second puncture interface 30, and the other end is connected to the communication port of the main control chip 1. The main control chip 1 is connected to an external motor through the motor drive circuit 4; the main control chip 1 is connected to an external photoelectric sensor through the photoelectric input circuit 8.

[0044] In order to overcome the defects of difficult and complicated wiring caused by the separate arrangement of the two parts, the present disclosure integrates the circuits of the power supply and control parts into one, so as to achieve unified wiring. In order to meet the power supply needs of various circuit components on the integrated circuit board, the power supply circuit 2 can provide one or more different voltages according to actual needs, and may include one or more stage buck modules. In this embodiment, a three-stage buck is designed. In normal circuit design, it is a conventional design to input a high voltage and then step down the voltage. Of course, in some embodiments, a buck or boost module can also be designed according to actual needs to meet the power supply needs of different components. The power supply circuit 2 is connected to the power bus through the first puncture interface 20, and realizes the step-by-step buck of the input voltage through the first step-down module 21, the second step-down module 22 and the third step-down module 23 in sequence. As shown in Figure 2, the external power supply voltage is 48V. The first-stage step-down module 21 uses a bidirectional voltage regulator diode and several filter capacitors to filter the incoming 48V DC voltage. It then performs a first-stage step-down through the first step-down chip U2, outputting a 12V DC voltage after filtering. The input end of the first-stage step-down module 21 is provided with an anti-reverse connection circuit, and the anti-reverse connection power-on is implemented by a MOS tube. As shown in Figure 3, the second-stage step-down module 22 performs a second-stage step-down through the second step-down chip U5. The input is the 12V output of the first-stage step-down module 21, and the output is a 5V DC voltage after filtering. The third-stage step-down module 23 performs a third-stage step-down through the third step-down chip U9. The input is the 5V output voltage of the second-stage step-down module 22, and the output is a 3.3V DC voltage after filtering. In addition, a fuse resistor is also provided in the first-stage step-down module 21 to protect the circuit.

[0045] As shown in Figure 5, in this embodiment, the communication circuit 3 uses a CAN communication circuit, and the communication bus is a CAN bus. The communication function is realized by the CAN processing chip U8. The CAN communication circuit is connected to the communication bus through the second puncture interface 30, and the second puncture interface 30 is connected to the CANH and CANL pins of the CAN processing chip. The CAN processing chip is connected to the main control chip 1 through the TXD and RXD pins. The CAN high and low level signals on the communication line are processed by the CAN processing chip and transmitted to the main control chip 1, transmitting the input signal of the external communication line to the main control chip 1, or transmitting the output signal of the main control chip 1 to the outside, realizing the communication function between the main control chip 1 and the outside. In order to ensure the stability of the input signal, a protection circuit is provided on the input end of the CAN high and low levels. The protection circuit includes a voltage stabilizer connected in parallel to the CAN high and low level connection ends and two sets of transient voltage suppression diodes connected in parallel to the CAN high and low level connection ends respectively.

[0046] It should be noted that both the main control chip and the CAN processing chip can be implemented using existing chips. Those skilled in the art can determine the specific models of the main control chip and the CAN processing chip based on actual conditions, and this will not be described in detail here. Furthermore, once the models of the main control chip and the CAN processing chip are determined, those skilled in the art can determine the connection relationship between the main control chip and the CAN processing chip and their corresponding circuit diagrams based on the chip user manuals.

[0047] In this embodiment, the main control chip 1 is connected to an external motor through the motor drive circuit 4 to realize the control of the brushless motor on the conveyor line. The motor drive circuit 4 includes a gate drive circuit 41 and an inverter circuit 42. As shown in Figures 6, 7, and 10, the gate drive circuit 41 is constructed using a gate drive chip. The input end of the gate drive circuit 41 is connected to the main control chip 1, and the output end of the gate drive chip is connected to the input end of the inverter circuit 42; the output end of the inverter circuit 42 is connected to the motor. The inverter circuit 42 includes 3 pairs of MOS tubes, corresponding to the U, V, and W phases of the motor respectively. The output ends of the 3 pairs of MOS tubes of the inverter circuit 42 are respectively connected to the U, V, and W phase interfaces of the motor connection interface 5 to realize the control of the motor.

[0048] In this embodiment, the motor drive circuit 4 further includes a voltage sampling circuit and a current sampling circuit 6 , which are configured to respectively collect the output voltage and current of the motor and transmit them to the main control chip 1 .

[0049] As shown in Figure 4, the voltage sampling circuit includes an input terminal, a power supply terminal, a voltage divider resistor R43, a grounding resistor R44, a diode D4, and an output terminal. The voltage divider resistor R43 has a resistance of 82kΩ, and the grounding resistor R44 has a resistance of 4.99kΩ. One end of the voltage divider resistor R43 is the input terminal, and the sampling point of the input terminal is the power supply (48V) of the power supply circuit 2. The other end of the voltage divider resistor R43 is grounded through the grounding resistor R44. The other end of the voltage divider resistor R43 is also connected to the positive electrode of the diode D4, the negative electrode of the diode D4 is connected to the output terminal (3.3V) of the third step-down chip U9, and the positive electrode of the diode D4 is connected to the voltage comparison interface of the main control chip 1. The main control chip 1 detects the power supply voltage of the motor through the voltage sampling circuit. When the detected voltage exceeds the set threshold, overvoltage protection is performed. Among them, the comparison of the detected voltage exceeding the set threshold by the main control chip 1 can be implemented using existing technology.

[0050] As shown in Figure 8, the current sampling circuit 6 collects the current value at the common terminal of the inverter circuit 42. The current sampling circuit 6 includes an operational amplifier. Its two input terminals are connected to ground (GND) and the common terminal (COM) of the inverter circuit 42. The output terminal is connected to an input pin of the main control chip 1 via a sampling resistor. The input current of the current comparison circuit is the current signal output by the MOS transistor in the inverter circuit 42. When a motor fault occurs, the current in the inverter circuit 42 increases. When the collected current exceeds the preset current threshold, overcurrent protection is activated.

[0051] In this embodiment, the motor drive circuit 4 also includes a Hall sampling circuit 7, the input end of the Hall sampling circuit 7 is connected to the Hall signal interface of the motor, and the output end is connected to the main control chip 1. As shown in Figure 9, the Hall sampling circuit 7 is configured to collect the three-phase Hall signal output by the motor and transmit it to the main control chip 1. The Hall sampling circuit 7 forms three differential voltage comparison circuits through the voltage comparator chip LM2901, corresponding to the U, V, and W phases of the motor respectively. The input ends of the three differential voltage comparison circuits are respectively connected to the three Hall signal interfaces of the motor connection interface 5, and the output ends are connected to the main control chip 1. The main control chip 1 judges the current motion state of the motor through the output signals of the three Hall sensors of the motor, and controls the three-phase output through the motor drive circuit 4 to ensure the normal operation of the motor. A dial switch SW1 is also provided in the Hall sampling circuit 7, which is configured to select different access voltages (12V or 5V) according to actual needs.

[0052] As shown in Figure 11, the main control chip 1 is connected to the photoelectric detection element (photoelectric sensor) through the photoelectric input interface 80, and the photoelectric detection signal of the photoelectric detection element is input into the main control chip 1 through the photoelectric input circuit 8. The photoelectric input circuit 8 includes a photoelectric coupler, which isolates the input and output signals, improves the anti-interference ability, and ensures the stability of the circuit operation.

[0053] As shown in Figure 4, the conveyor line terminal control device also includes peripheral circuits, including a reset circuit 9 and a crystal oscillator circuit 10. The reset circuit 9 is connected to the reset port of the main control chip 1. The crystal oscillator circuit 10 is connected to the clock port of the main control chip 1. The reset circuit 9 is configured to implement the reset function of the main control chip 1, and the crystal oscillator circuit 10 provides a stable clock pulse signal for the operation of the main control chip 1.

[0054] The main control chip 1 is also connected to a debugging interface 11, as shown in FIG12. After the debugging interface 11 is connected to a host computer, the host computer is used to program and debug the terminal control device.

[0055] According to the circuit's power supply voltage requirements, the voltage sampling circuit, motor drive circuit 4, current sampling circuit 6, Hall sampling circuit 7, photoelectric input circuit 8, reset circuit 9, and crystal oscillator circuit 10 are connected to the output of the three-stage step-down module 23 and powered by 3.3V. The communication circuit 3 is connected to the output of the two-stage step-down module 22 and powered by 5V. In addition, other electronic components in the circuit are also powered by the power supply circuit 2. For example, the main control chip 1 and debug interface 11 are connected to the output of the three-stage step-down module 23 and powered by 3.3V, and the photoelectric input interface 80 is connected to the output of the first-stage step-down module 21 and powered by 12V.

[0056] This embodiment also integrates the main control chip, power supply circuit, communication circuit, motor drive circuit, photoelectric input circuit and peripheral circuit into one, realizing common wiring of power supply and control.

[0057] The power supply circuit of this embodiment is provided with a multi-stage step-down module to meet various power supply requirements of the main control chip and peripheral circuits.

[0058] The above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Industrial Applicability

[0059] The above solution can realize common wiring of power supply and control, overcoming the defect of separate wiring of power supply and control in the prior art.

Claims

1. A conveyor line terminal control device, characterized in that: include: Main control chip, power supply circuit, communication circuit, motor drive circuit and photoelectric input circuit; The input end of the power supply circuit is connected to the power bus through the first puncture interface, and the output end is configured to supply power to the main control chip, the communication circuit, the motor drive circuit and the photoelectric input circuit respectively; One end of the communication circuit is connected to the communication bus through the second puncture interface, and the other end is connected to the communication port of the main control chip; The main control chip is connected to an external motor via the motor drive circuit; The main control chip is externally connected to a photoelectric sensor via the photoelectric input circuit.

2. A conveyor line terminal control device according to claim 1, characterized in that: The power supply circuit is a single-stage voltage drop circuit or a multi-stage voltage drop circuit.

3. A conveyor line terminal control device according to claim 1 or 2, characterized in that: The power supply circuit includes a primary step-down module, a secondary step-down module and a tertiary step-down module; The first-stage step-down module uses a bidirectional voltage regulator diode and a plurality of filter capacitors to filter the input 48V DC voltage, and then performs a first-stage step-down through the first step-down chip to output a 12V DC voltage after filtering; The input end of the first-stage step-down module is provided with an anti-reverse connection circuit, and the anti-reverse connection power-on is realized by a MOS tube; The first-stage step-down module is also provided with a safety resistor to protect the circuit.

4. A conveyor line terminal control device as claimed in claim 3, characterized in that: The secondary buck module performs secondary bucking through a second buck chip, with the input being the output 12V of the primary buck module, and outputting a 5V DC voltage after filtering.

5. A conveyor line terminal control device as claimed in claim 3 or 4, characterized in that: The three-stage buck module performs three-stage bucking through a third buck chip, and the input is the output voltage 5V of the two-stage buck module, and outputs a 3.3V DC voltage after filtering.

6. A conveyor line terminal control device according to any one of claims 1 to 5, characterized in that: The communication circuit is a CAN communication circuit, and the communication bus is a CAN bus.

7. A conveyor line terminal control device according to claim 6, characterized in that: The CAN communication circuit includes a CAN processing chip and a protection circuit. The CAN high and low level signals on the CAN bus are processed by the CAN processing chip and transmitted to the main control chip. The protection circuit includes a voltage regulator connected in parallel to the CAN high and low level connection ends and two groups of transient voltage suppression diodes connected in parallel to the CAN high and low level connection ends respectively.

8. A conveyor line terminal control device according to claim 7, characterized in that: The CAN communication circuit is connected to the communication bus through a second puncture interface, the second puncture interface is connected to the CANH and CANL pins of the CAN processing chip, and the CAN processing chip is connected to the main control chip through the TXD and RXD pins.

9. A conveyor line terminal control device according to any one of claims 1 to 8, characterized in that: The motor drive circuit includes a gate drive circuit and an inverter circuit. The input end of the gate drive circuit is connected to the main control chip, the output end of the gate drive circuit is connected to the input end of the inverter circuit, and the output end of the inverter circuit is connected to the motor.

10. A conveyor line terminal control device according to claim 9, characterized in that: The inverter circuit includes three pairs of MOS tubes corresponding to the U, V, and W phases of the motor respectively. The output ends of the three pairs of MOS tubes of the inverter circuit are respectively connected to the U, V, and W phase interfaces of the motor connection interface.

11. A conveyor line terminal control device according to claim 9 or 10, characterized in that: The motor drive circuit also includes a voltage sampling circuit and a current sampling circuit. The voltage sampling circuit is configured to collect the power supply voltage of the motor and transmit it to the main control chip. The current sampling circuit is configured to collect the current signal output by the inverter circuit and transmit it to the main control chip.

12. A conveyor line terminal control device according to claim 11, characterized in that: The voltage sampling circuit includes an input terminal, a power supply terminal, a voltage dividing resistor, a grounding resistor, a diode and an output terminal; One end of the voltage-dividing resistor is an input end, a sampling point of the input end is the power supply of the power supply circuit, and the other end of the voltage-dividing resistor is grounded through the grounding resistor; the other end of the voltage-dividing resistor is also connected to the positive electrode of the diode, the negative electrode of the diode is connected to the output end of the third step-down chip, and the positive electrode of the diode is connected to the voltage comparison interface of the main control chip.

13. A conveyor line terminal control device according to claim 11 or 12, characterized in that: The current sampling circuit includes an operational amplifier, one of the two input terminals of the operational amplifier is grounded GND, and the other is connected to the common terminal COM of the inverter circuit, and the output terminal is connected to an input pin of the main control chip through a sampling resistor.

14. A conveyor line terminal control device according to any one of claims 1 to 13, characterized in that: The motor drive circuit further includes a Hall sampling circuit, the input end of the Hall sampling circuit is connected to the Hall signal interface of the motor, and the output end is connected to the main control chip.

15. A conveyor line terminal control device according to claim 14, characterized in that: The Hall sampling circuit is further provided with a dial switch configured to select different access voltages according to actual needs.

16. A conveyor line terminal control device according to any one of claims 1 to 15, characterized in that: The photoelectric input circuit includes a photoelectric coupler, and the isolation of input and output signals is achieved through the photoelectric coupler.

17. A conveyor line terminal control device according to any one of claims 1 to 16, characterized in that: The conveyor line terminal control device further includes a peripheral circuit, which includes a reset circuit connected to a reset port of a main control chip.

18. A conveyor line terminal control device according to any one of claims 1 to 17, characterized in that: The conveyor line terminal control device further includes a peripheral circuit, which includes a crystal oscillator circuit, and the crystal oscillator circuit is connected to the clock port of the main control chip.

19. A conveyor line terminal control device according to claim 17 or 18, characterized in that: The main control chip, power supply circuit, communication circuit, motor drive circuit, photoelectric input circuit and peripheral circuit are integrated into one.

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