A wireless transmission module and a rotary processing device

Abstract

This utility model discloses a wireless transmission module and a rotary machining device. The wireless transmission module includes a transmitter and a receiver. The transmitter includes a first RJ45 interface, a first PHY chip, a first FPGA module, a second PHY chip, and a first optical module, all electrically connected in sequence. The receiver includes a second optical module, a third PHY chip, a second FPGA module, a fourth PHY chip, and a second RJ45 interface, all electrically connected in sequence. An optical signal transmission path is formed between the first and second optical modules. Both the first and second FPGA modules integrate an EtherCAT controller. The rotary machining device includes a frame, a DD motor, a workpiece, a workpiece drive assembly, and the wireless transmission module. The transmitter is mounted on the frame, and the receiver is mounted on the rotation shaft of the DD motor. The receiver is electrically connected to the workpiece drive assembly. This utility model uses a contactless wireless transmission module instead of an electric slip ring, which is less prone to damage, has a longer service life, and thus reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing signal transmission technology, specifically to a wireless transmission module and a rotary processing device. Background Technology

[0002] In some rotary machining equipment, a DD motor is typically used as the main rotating shaft. A number of smaller motors are then mounted on the DD motor's main shaft for tasks such as material handling and placement. Control signals need to be transmitted to these smaller motors. Traditionally, this is achieved by using electrical slip rings or fiber optic slip rings mounted on the DD motor. The slip rings are primarily used for transmitting electrical signals. With the widespread adoption of EtherCAT industrial fieldbus, the control signals for these smaller motors are generally EtherCAT signals. This facilitates the synchronous control of multiple motors, whereas traditional CAN and RS485 methods cannot achieve good synchronization. Making EtherCAT wireless has become a pain point in the industry. Using a contact-type rotary connection method, the slip ring body and slip ring contacts are in contact. Due to contact friction, over time, the contacting slip ring body and slip ring contacts wear down, causing control signal transmission failure. Furthermore, slip ring maintenance is costly. In addition, it increases friction on the DD motor, affecting its speed. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model provides a wireless transmission module and a rotary processing device. The wireless transmission module replaces the electric slip ring to transmit EtherCAT signals, solving the signal failure problem caused by contact friction of the electric slip ring, and reducing equipment maintenance costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A wireless transmission module includes a transmitter and a receiver. The transmitter includes a first RJ45 interface, a first PHY chip, a first FPGA module, a second PHY chip, and a first optical module that are electrically connected in sequence. The receiver includes a second optical module, a third PHY chip, a second FPGA module, a fourth PHY chip, and a second RJ45 interface that are electrically connected in sequence.

[0006] An optical signal transmission path is formed between the first optical module and the second optical module;

[0007] Both the first FPGA module and the second FPGA module integrate an EtherCAT controller. The signal input rate of the first FPGA module is 100Mbps and the signal output rate is 1Gbps; the signal input rate of the second FPGA module is 1Gbps and the signal output rate is 100Mbps.

[0008] As a further improvement to the above technical solution, the first RJ45 interface is used to receive the 100Mbps standard electrical signal output by the upstream EtherCAT device, the transmission rate of the first PHY chip is 100Mbps, and the EtherCAT controller of the first FPGA module is electrically connected to the first PHY chip through the MII or RMII interface.

[0009] As a further improvement to the above technical solution, the first FPGA module uses internal logic processing to increase the speed of the 100Mbps electrical signal to the 1Gbps electrical signal.

[0010] As a further improvement to the above technical solution, the transmission rate of the second PHY chip is 1Gbps, and the EtherCAT controller of the first FPGA module is electrically connected to the second PHY chip through a GMII or RGMII interface.

[0011] As a further improvement to the above technical solution, the first optical module is used to convert electrical signals into optical signals and transmit them to the second optical module via laser. The second optical module is used to receive the optical signals and restore them to electrical signals.

[0012] As a further improvement to the above technical solution, the transmission rate of the third PHY chip is 1Gbps, and the EtherCAT controller of the second FPGA module is electrically connected to the third PHY chip through a GMII or RGMII interface.

[0013] As a further improvement to the above technical solution, the second FPGA module uses internal logic processing to reduce the speed of the 1Gbps electrical signal to a 100Mbps electrical signal.

[0014] As a further improvement to the above technical solution, the transmission rate of the fourth PHY chip is 100Mbps, the second FPGA module is electrically connected to the fourth PHY chip through the RMII or MII interface, and the second RJ45 interface is used to output the 100Mbps standard electrical signal to the downstream EtherCAT device.

[0015] The present invention also provides the following technical solution: a rotary processing device, comprising a wireless transmission module, a frame, a DD motor mounted on the frame, a workpiece mounted on the drive end of the DD motor, and a workpiece drive assembly. The transmitting end of the wireless transmission module is mounted on the frame, and the receiving end of the wireless transmission module is mounted on the rotating shaft of the DD motor, with the receiving end located directly below the transmitting end. The receiving end is electrically connected to the workpiece drive assembly.

[0016] As a further improvement to the above technical solution, the drive end of the DD motor is provided with a turntable, and multiple working parts and working part drive components are arranged in a ring on the turntable.

[0017] The beneficial effects of this utility model are: converting the electrical signal of the upstream EtherCAT equipment into an optical signal, using laser to transmit the optical signal, and then converting it back into an electrical signal to transmit to the downstream EtherCAT equipment, thereby realizing contactless transmission of control signals. This allows the existing slip ring to be replaced by the wireless transmission module, avoiding the failure of the slip ring in transmitting control signals and reducing maintenance costs. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a structural block diagram of a wireless transmission module according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of a rotary processing device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a rotary processing device in one direction according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a rotary processing device in another direction according to an embodiment of the present invention.

[0023] Reference numerals: 100, base; 200, mounting bracket; 300, DD motor; 301, rotating shaft; 400, turntable; 500, working component drive assembly; 600, working component; 700, transmitter; 701, first RJ45 interface; 702, first PHY chip; 703, first FPGA module; 704, second PHY chip; 705, first optical module; 800, receiver; 801, second optical module; 802, third PHY chip; 803, second FPGA module; 804, fourth PHY chip; 805, second RJ45 interface. Detailed Implementation

[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0025] Reference Figure 1 This utility model provides a wireless transmission module, including a transmitter 700 and a receiver 800. The transmitter 700 includes a first RJ45 interface 701, a first PHY chip 702, a first FPGA module 703, a second PHY chip 704, and a first optical module 705, which are connected in sequence. The receiver 800 includes a second optical module 801, a third PHY chip 802, a second FPGA module 803, a fourth PHY chip 804, and a second RJ45 interface 805, which are connected in sequence. The first optical module 705 and the second optical module 801 are both laser transceiver modules (wavelength 850nm, transmission distance ≤5m), used to realize bidirectional conversion between electrical signals and optical signals. The first optical module 705 and the second optical module 801 form an optical signal transmission path through laser. The first FPGA module 703 and the second FPGA module 803 both integrate an EtherCAT controller, which is used to realize the parsing and processing of EtherCAT protocol frames.

[0026] Specifically, the first RJ45 interface 701 is used to receive a 100Mbps (hereinafter referred to as 100M) standard EtherCAT signal output from an upstream EtherCAT device. The first PHY chip 702 is used to convert the EtherCAT signal into an electrical signal (first electrical signal) that can be processed by the first FPGA module 703. The transmission rate of the first PHY chip 702 is 100M. The first FPGA module 703 is electrically connected to the first PHY chip 702 through an MII or RMII interface. The first FPGA module 703, through internal logic processing, increases the 100Mbps first electrical signal to a 1Gbps (hereinafter referred to as 1G) second electrical signal (specific steps: temporarily storing the 100Mbps low-speed data in the FPGA's internal buffer; using a PLL (phase-locked loop) or DLL (delay-locked loop) to convert the low-speed clock to a high-speed clock; re-encoding and formatting the data according to the requirements of the high-speed signal; outputting the re-encoded data at a rate of 1Gbps), and transmits it to the second PHY chip 704. The second PHY chip 704 has a transmission rate of 1G. The first FPGA module 703 is electrically connected to the second PHY chip 704 through a GMII or RGMII interface. The second PHY chip 704 is used to convert the second electrical signal into a third electrical signal compatible with the first optical module 705. The first optical module 705 is used to convert the 1G rate third electrical signal into an optical signal and transmit it to the second optical module 801 via laser.

[0027] The second optical module 801 receives the optical signal and converts it back into a 1Gbps third electrical signal. The third PHY chip 802 converts the third electrical signal transmitted by the second optical module 801 into a 1Gbps fourth electrical signal that can be processed by the second FPGA module 803. The transmission rate of the third PHY chip 802 is 1Gbps. The second FPGA module 803 is electrically connected to the third PHY chip 802 via a GMII or RGMII interface. The second FPGA module 803 processes the 1Gbps fourth electrical signal internally to reduce the speed to a 100Mbps fifth electrical signal (specific steps: temporarily storing the 1Gbps high-speed data in the FPGA's internal buffer; using a PLL (phase-locked loop) or DLL (delay-locked loop) to convert the high-speed clock to a low-speed clock; re-encoding and formatting the data according to the requirements of the low-speed signal; outputting the re-encoded data at a rate of 100Mbps), and then transmitting it to the fourth PHY chip 804. The fourth PHY chip 804 has a transmission rate of 100M. The second FPGA module 803 is electrically connected to the fourth PHY chip 804 through an MII or RMII interface. The fourth PHY chip 804 is used to convert the 100M rate fifth electrical signal into a 100M rate standard EtherCAT signal. The second RJ45 interface 805 is used to output the 100Mbps EtherCAT signal converted by the fourth PHY chip 804 to downstream EtherCAT devices.

[0028] Understandably, in this embodiment, the electrical signal is first converted into an optical signal, and then the optical signal is converted back into an electrical signal. This allows for contactless transmission of control signals (EtherCAT signals) via optical signals, replacing the existing method of using an electrical slip ring to transmit EtherCAT signals. This avoids the failure of control signal transmission due to contact damage to the electrical slip ring, as well as the high maintenance costs. Specifically, the first optical module 705 and the second optical module 801 do not transmit EtherCAT signals; they only transparently transmit information from the PHY chip. Furthermore, because the optical modules need to transmit signals at gigabit speeds (stable operation is impossible below 100Mbps), the first FPGA module 703 amplifies the 100Mbps EtherCAT signal to 1Gbps to meet optical transmission requirements. The receiving end, conversely, slows down the signal and restores it to a 100Mbps signal compatible with downstream devices via the second FPGA module 803. The second PHY chip 704 and the third PHY chip 802 both have a transmission rate of 1G to adapt to the 1Gbps EtherCAT signal transmission. Correspondingly, the second PHY chip 704 is electrically connected to the first FPGA module 703 through a GMII or RGMII interface, and the third PHY chip 8024 is electrically connected to the second FPGA module 803 through a GMII or RGMII interface.

[0029] Reference Figures 2-4This utility model also provides a rotary processing device, including a frame, a DD motor 300, a turntable 400, a workpiece 600, a workpiece drive assembly 500, and a wireless transmission module. The frame includes a base 100 and a mounting bracket 200 fixedly connected to the top of the base 100. The stator of the DD motor 300 is fixedly connected to the mounting bracket 200. The bottom of the rotating shaft 301 (rotor) of the DD motor 300 is fixedly connected to the turntable 400. Four workpiece drive assemblies 500 are arranged in a ring on the turntable 400. The workpiece 600 is provided at the drive end of the workpiece drive assembly 500. Specifically, the workpiece drive assembly 500 is a servo motor used to drive the workpiece 600 to rotate. The workpiece 600 can be a suction nozzle for picking up and placing materials or a drill bit for drilling, etc. The transmitter 700 of the wireless transmission module is mounted on the inner top of the mounting bracket 200. The transmitter 700 is electrically connected to the controller of the servo motor (the servo motor is a downstream EtherCAT device, and the controller of the servo motor is an upstream EtherCAT device). The receiver 800 of the wireless transmission module is mounted on the rotation shaft 301 of the DD motor 300, and the receiver 800 is located directly below the transmitter 700. This allows the laser emitted by the first optical module 705 to be projected onto the second optical module 801. Because the receiver 800 is located directly below the transmitter 700, and because the receiver 800 rotates synchronously with the rotation shaft 301, the laser transmission path always remains vertically aligned. Therefore, even under high-speed rotation, the optical signal can still be transmitted stably. The receiver 800 is electrically connected to the servo motor. Specifically, the electrical connection between the servo motor and the receiver 800 uses a shielded cable to reduce electromagnetic interference. This invention enables wireless transmission of control signals, and compared to existing methods that transmit control signals via slip rings, it has a longer service life and lower maintenance costs.

[0030] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A wireless transmission module, characterized in that, It includes a transmitter and a receiver. The transmitter includes a first RJ45 interface, a first PHY chip, a first FPGA module, a second PHY chip, and a first optical module that are connected in sequence. The receiver includes a second optical module, a third PHY chip, a second FPGA module, a fourth PHY chip, and a second RJ45 interface that are connected in sequence. An optical signal transmission path is formed between the first optical module and the second optical module; Both the first FPGA module and the second FPGA module integrate an EtherCAT controller. The signal input rate of the first FPGA module is 100Mbps and the signal output rate is 1Gbps; the signal input rate of the second FPGA module is 1Gbps and the signal output rate is 100Mbps.

2. The wireless transmission module according to claim 1, characterized in that: The first RJ45 interface is used to receive the 100Mbps standard electrical signal output by the upstream EtherCAT device. The transmission rate of the first PHY chip is 100Mbps. The EtherCAT controller of the first FPGA module is electrically connected to the first PHY chip through the MII or RMII interface.

3. The wireless transmission module according to claim 1, characterized in that: The first FPGA module uses internal logic processing to increase the speed of a 100Mbps electrical signal to a 1Gbps electrical signal.

4. A wireless transmission module according to claim 1, characterized in that: The second PHY chip has a transmission rate of 1Gbps, and the EtherCAT controller of the first FPGA module is electrically connected to the second PHY chip through a GMII or RGMII interface.

5. A wireless transmission module according to claim 1, characterized in that: The first optical module is used to convert electrical signals into optical signals and transmit them to the second optical module via laser. The second optical module is used to receive the optical signals and convert them back into electrical signals.

6. A wireless transmission module according to claim 1, characterized in that: The third PHY chip has a transmission rate of 1Gbps, and the EtherCAT controller of the second FPGA module is electrically connected to the third PHY chip through a GMII or RGMII interface.

7. A wireless transmission module according to claim 1, characterized in that: The second FPGA module uses internal logic processing to reduce the speed of a 1Gbps electrical signal to a 100Mbps electrical signal.

8. A wireless transmission module according to claim 1, characterized in that: The transmission rate of the fourth PHY chip is 100Mbps. The second FPGA module is electrically connected to the fourth PHY chip through an RMII or MII interface. The second RJ45 interface is used to output the 100Mbps standard electrical signal to the downstream EtherCAT device.

9. A rotary machining apparatus, comprising a frame, a DD motor mounted on the frame, a workpiece mounted on the drive end of the DD motor, and a workpiece drive assembly, characterized in that: It also includes the wireless transmission module according to any one of claims 1-8, wherein the transmitting end of the wireless transmission module is mounted on the rack, the receiving end of the wireless transmission module is mounted on the rotating shaft of the DD motor, and the receiving end is located directly below the transmitting end, and the receiving end is electrically connected to the working component drive assembly.

10. A rotary machining apparatus according to claim 9, characterized in that: The drive end of the DD motor is provided with a turntable, and multiple working parts and working part drive components are arranged in a ring on the turntable.

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