Multi-channel high-speed infrared temperature measurement equipment supporting Ethercat protocol

Abstract

The utility model discloses a multi-path high speed infrared temperature measuring device supporting an Ethercat protocol, comprising a multi-path temperature measuring gun body, the temperature measuring gun body uploads and downloads data through an Ethercat protocol conversion module, the Ethercat protocol conversion module comprises a CPU, the CPU is connected with a PHY chip through a multi-path UART simultaneously, the CPU can also communicate with an MCU through an SPI interface, and the MCU is connected with the CPU through an MCU interface. The MCU is connected with the Ethercat chip through a parallel bus and packages original data, and the protocol conversion device serves as an Ethercat slave station to be in signal connection with an external master station device and can be connected with the multiple temperature measuring gun bodies through a connector at the same time. The multi-path high-speed infrared temperature measurement equipment adopting the protocol conversion equipment is additionally provided with an Ethercat interface on the basis of the existing equipment, can meet the requirements of a data real-time high-precision industrial site, supports real-time synchronization and protocol conversion of multi-path 1.5 Mbps RS422 data, and is high in acquisition frequency and good in accuracy.

Description

Technical Field

[0001] This utility model relates to the field of industrial communication technology, and in particular to a multi-channel high-speed infrared temperature measurement device that supports the Ethercat protocol. Background Technology

[0002] Traditional EtherCAT protocol conversion devices typically employ a single CPU for data acquisition, converting multiple serial ports to Ethernet. Examples include the CN202420103888.0 FPGA-based high-speed serial port conversion module and the CN202410994152.1 FPGA-based multi-channel ultra-high-speed temperature measuring instrument. However, traditional Ethernet-based methods generally suffer from transmission delays, data conflicts, and topology rigidity issues.

[0003] Alternatively, the data acquired via serial port can be converted to the Ethercat protocol, such as CN202311678306.8, a multi-mode real-time data acquisition system based on the Ethercat bus for exoskeleton robots; and CN202410175946.5, a plasma source communication control system and method based on a remote protocol. However, these only support 2-4 serial ports, limiting their application scenarios. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a multi-channel high-speed infrared temperature measurement device that supports the Ethercat protocol. This device adds an Ethercat protocol conversion module to the existing equipment, which can meet the requirements of real-time high-precision data in industrial settings. It also supports real-time synchronization and protocol conversion of multiple 1.5Mbps RS422 data streams, with high acquisition frequency and good accuracy.

[0005] A multi-channel high-speed infrared temperature measurement device supporting the EtherCAT protocol includes a multi-channel temperature gun body. The temperature gun body uploads and downloads data through an EtherCAT protocol conversion module. The EtherCAT protocol conversion module includes a CPU. The CPU is also connected to a PHY chip through multiple UARTs. The CPU can also communicate with an MCU through an SPI interface. The MCU is connected to an EtherCAT chip through a parallel bus and encapsulates the raw data. The protocol conversion device acts as an EtherCAT slave station and connects to an external master station device via a signal connection. It can also connect to multiple temperature gun bodies simultaneously through a connector.

[0006] As a preferred embodiment of the above technical solution, the CPU can manage 8 UARTs simultaneously.

[0007] As a preferred embodiment of the above technical solution, the CPU also supports Ethernet communication, connects to the PHY chip via Ethernet, and sends the collected data via TCP / IP.

[0008] As a preferred embodiment of the above technical solution, the clock frequency for communication between the CPU and the MCU is not less than 20MHz.

[0009] As a preferred embodiment of the above technical solution, the external master station device can be any one of an Ethercat master station, a host computer, or a PLC device.

[0010] As a preferred embodiment of the above technical solution, the external master station device can connect to multiple Ethercat slave stations simultaneously.

[0011] The beneficial effects of this utility model are as follows:

[0012] This device adds an Ethercat interface to existing equipment, enabling it to meet the high-precision, real-time data requirements of industrial environments. It supports real-time synchronization and protocol conversion of 8 channels of 1.5Mbps RS422 data. The high-speed infrared thermometer supports up to 1000 data acquisitions per second and can synchronize data to the Ethercat master station in real time, ensuring accurate temperature measurement in industrial environments with drastic temperature changes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this application.

[0014] Figure 2 This is a schematic diagram of the data transmission principle of the temperature measuring gun.

[0015] Figure 3 This is a schematic diagram of the signal connection between the external master station equipment and the Ethercat slave station.

[0016] The attached diagram is labeled as follows: 1-Temperature gun body, 2-CPU, 3-PHY chip, 4-MCU, 5-Ethercat chip, 6-Ethercat slave station, 7-External master station device, 8-Connector. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] like Figure 1The illustrated multi-channel high-speed infrared temperature measurement device supporting the EtherCAT protocol includes a multi-channel temperature gun body. The temperature gun body uploads and downloads data through an EtherCAT protocol conversion module. The EtherCAT protocol conversion module includes a CPU2. The CPU2 is also connected to a PHY chip 3 via a multi-channel UART. The CPU2 can also communicate with an MCU4 via an SPI interface. The MCU4 is connected to an EtherCAT chip 5 via a parallel bus and encapsulates the raw data. The protocol conversion device acts as an EtherCAT slave station 6 and is signal-connected to an external master station device 7. It can also be connected to the multi-channel temperature gun body 1 simultaneously via a connector 8.

[0019] In this embodiment, the CPU2 can manage 8 UARTs simultaneously.

[0020] In this embodiment, the CPU2 also supports Ethernet communication, connects to the PHY chip 3 via Ethernet, and sends the collected data via TCP / IP.

[0021] In this embodiment, the clock frequency for communication between CPU2 and MCU4 is not less than 20MHz.

[0022] In this embodiment, the external master station device 7 can be any one of an Ethercat master station, a host computer, or a PLC device.

[0023] In this embodiment, the external master station device 7 can connect to multiple Ethercat slave stations 6 simultaneously.

[0024] In this embodiment, the signals from the multi-channel temperature gun 8 are connected through connector 8 (in this embodiment, a connector with external discharge function is used), and its data transmission principle is as follows: Figure 2 As shown, the signal passes through an operational amplifier (op-amp) (signal conditioning) → analog-to-digital converter (ADC) acquisition → digital signal processing (DSP), forming a complete signal processing chain. The operational amplifier circuit is used to improve the anti-interference capability of weak sensor signals; the ADC acquisition uses a 16-bit resolution ADC with a sampling rate ≥10kSPS; and the DSP processing is used to implement the temperature compensation algorithm.

[0025] The working principle of the data acquisition module is as follows:

[0026] CPU2 can simultaneously manage 8 UART connections to RS422 PHY chip 3, enabling data reception from multiple temperature guns 8.

[0027] It can also connect to PHY chip 3 via GMAC (Gigabit Ethernet interface), supporting 10 / 100 / 1000Mbps auto-adaptation, and send the collected data via TCP / IP.

[0028] It can also communicate with MCU4 via the SPI interface (full-duplex mode) with a clock frequency ≥20MHz.

[0029] MCU4 receives preprocessed data from CPU2 and connects to Ethercat chip 5 via a parallel bus (16-bit data lines + address lines) to encapsulate the raw data into an Ethercat PDO (Process Data Object).

[0030] In this embodiment, the working status of the Ethercat chip 5 can be displayed by the set indicator light, and the MCU4 supports the reset function.

[0031] The protocol conversion device, acting as an Ethercat slave (6), requires the Ethercat_IN interface of the first device to be connected to an external master device. In this embodiment, the external master device (7) is an Ethercat master device, which can be a host computer or a PLC. This device can automatically adapt to the industrial field equipment of the master device, such as... Figure 3 As shown.

[0032] The protocol conversion device can also collect and transmit data in the following ways:

[0033] 1. The solution adopts a dual MCU4 + Ethercat chip 5 approach. One MCU4 is responsible for serial communication and processing of the acquired temperature data, while the other MCU4 is responsible for communication with the Ethercat chip 5.

[0034] 2. The solution is implemented using FPGA + MCU4 + Ethercat chip 5. The FPGA is responsible for serial communication and processing of the acquired temperature data, while the MCU4 is responsible for communication with the Ethercat chip 5.

[0035] 3. It is implemented using a dedicated ARM chip from TI, which supports Ethercat communication and can also perform serial communication and process the acquired temperature data.

[0036] All of the above methods can achieve the technical solution that this application wants to protect, and can be used in this application.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-channel high-speed infrared temperature measurement device supporting Ethercat protocol, characterized in that: Including multi-channel temperature measuring gun body, the temperature measuring gun body uploads and downloads data through an Ethercat protocol conversion module, the Ethercat protocol conversion module includes a CPU, the CPU is connected with a PHY chip through multi-channel UART at the same time, the CPU can also communicate with an MCU through an SPI interface, the MCU is connected with an Ethercat chip through a parallel bus and encapsulates raw data, the protocol conversion device is connected with an external master station device signal as an Ethercat slave station and can be connected with multiple temperature measuring gun bodies through a connector at the same time.

2. The multi-channel high-speed infrared temperature measurement device supporting the Ethercat protocol according to claim 1, characterized in that: The CPU can manage 8 channels of UART at the same time.

3. The multi-channel high-speed infrared temperature measurement device supporting Ethercat protocol according to claim 1, characterized in that: The CPU also supports Ethernet communication, connects the PHY chip through Ethernet and sends the collected data through Tcp / ip.

4. The multi-channel high-speed infrared temperature measurement device supporting Ethercat protocol according to claim 1, characterized in that: The clock frequency of the communication between the CPU and the MCU is not less than 20 MHz.

5. The multi-channel high-speed infrared temperature measurement device supporting Ethercat protocol according to claim 1, characterized in that: The external master station device can be any one of an Ethercat master station, an upper computer or a PLC device.

6. The multi-channel high-speed infrared temperature measurement device supporting the Ethercat protocol according to claim 5, characterized in that: The external master station device can be connected with multiple Ethercat slave stations at the same time.

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