Escalator data acquisition device and acquisition method

Abstract

The escalator data acquisition device comprises a shell, a circuit board, an alarm switch, an electric wire used for communication and a sensor interface are arranged in the shell, and the circuit board comprises at least one power supply conversion module used for being connected with a power supply conversion module, a main control module and an acquisition module. The main control module comprises an ARM core board, an ARM expansion board and a first external interface, and the acquisition module comprises an FPGA core board, an FPGA expansion board, a sensor acquisition circuit expansion board and a second external interface. According to the invention, automatic and real-time acquisition, processing, analysis, storage and transmission are carried out on the data of the parts of the escalator, so that the occurrence of faults and accidents of the whole-line escalator is reduced, and the safe use, personnel management, maintenance management and part management levels of professional equipment of the escalator are improved.

Description

Technical Field

[0001] The invention relates to a data acquisition device and a data acquisition method, and in particular to an escalator data acquisition device and a data acquisition method. Background Art

[0002] An escalator is a large-scale electric-driven device that continuously transports people. It is mainly used to transport passengers upward or downward between different floors of a building. Escalator failures and accidents occur from time to time. In order to improve the management level of escalator professional equipment safety use, personnel management, maintenance management, spare parts, etc., the main components of the escalator are monitored and analyzed to ultimately reduce accidents and reduce the maintenance costs of the escalator throughout its life cycle. In the existing technology, escalator data collection has fewer collection parameters, speed cannot be synchronized, and efficiency is low. There is an urgent need for a more efficient maintenance management technology to improve the safety and reliability of escalator operation. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide an automatic and real-time escalator data acquisition device and method.

[0004] Technical solution: An escalator data acquisition device described in the present invention includes a shell, which includes a circuit board, an alarm switch, wires for communication and a sensor interface. The circuit board includes at least one power conversion module, a main control module and an acquisition module for connecting to the power conversion module. The main control module includes an ARM core board, an ARM expansion board and a first external interface. The acquisition module includes an FPGA core board, an FPGA expansion board, a sensor acquisition circuit expansion board and a second external interface.

[0005] The acquisition module is connected to the sensor through an AD conversion circuit and a sensor detection interface.

[0006] The housing includes a signal isolator connected to the ARM core board and is used to keep the signal stable during signal transmission.

[0007] The housing includes a WIFI module and a Bluetooth module, which are connected to the ARM core board.

[0008] The housing includes a CAN interface and a SPI interface.

[0009] An escalator data collection method according to the present invention comprises the following steps:

[0010] S1: The backend server sends a collection command, and the main control module accepts the command to complete the task;

[0011] S2: The main control module sends a control command to the acquisition module to open the AD channel;

[0012] S3: The sensor sends a data signal which is converted into digital form through an AD conversion circuit;

[0013] S4: The data after analog-to-digital conversion passes through the acquisition module, and the acquisition module transmits the data to the main control module;

[0014] S5: After the main control module processes the data, it transmits the data to the background server by wired and wireless means.

[0015] The data after the analog-to-digital conversion in step S4 is filtered by the acquisition module and then transmitted to the main control module.

[0016] In step S5, the main control module processes the data, including screening the data to extract the maximum value and the minimum value, and judging whether the data is abnormal according to the alarm threshold.

[0017] The main control module and the acquisition module realize data transmission through a gigabit network cable.

[0018] The backend server is linked to a WeChat applet based on terminal control, and data is read and displayed through the applet.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: by collecting multivariate data during the operation of the escalator, an edge computing model is established to improve the accuracy of sub-health prediction; through a high-performance ARM processor, a lightweight artificial intelligence algorithm can be run locally to directly perform simple fault diagnosis and sub-health prediction. The use of multivariate algorithms on the edge side has higher diagnostic efficiency and is easy to deploy in embedded devices. The use of multi-parameter analysis conditions has higher accuracy in sub-health prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an internal structure diagram of the escalator data acquisition device described in the present invention.

[0021] Figure 2 The hardware structure framework diagram of the escalator data acquisition device described in the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, an escalator data acquisition device includes a shell 1, the upper end of the shell 1 is provided with a door opening alarm switch 2, a power switch 3, and a wire 4 for communication, and a power interface 5 and a sensor interface 6 are provided at the bottom of the shell 1; a circuit board 7 is provided inside the shell 1, and the circuit board 7 includes at least one power conversion module 8 connected to the power supply conversion module, and the circuit board 7 also includes a main control module 9 and an acquisition module 10.

[0024] The main control module 9 includes an ARM core board 11, an ARM expansion board 12, and a first external interface 13; the main control module 9 pre-processes the original data, and stores the data locally in the form of a file, transmits data through a gigabit network cable, and transmits the original data of the FPGA to ARM, and the result data after ARM processing is sent to the platform; the ARM core board in the main control module receives the platform to send commands to complete the corresponding tasks, and the ARM core board sends commands to the FPGA core board to control the acquisition parameters. The main control module 9 is used for edge computing, screens the original data to extract the maximum and minimum values, checks abnormal data and alarms, and determines whether the data is abnormal according to the alarm threshold.

[0025] The ARM core board 11 is connected to two RS485 signal isolators 35 , two Gigabit Ethernet ports 36 , a wireless WIFI or buletooth Bluetooth 37 , a 4G / 5G module 38 , a CAN interface 39 , and an SPI interface 40 .

[0026] The acquisition module 10 includes an FPGA core board 14, an FPGA expansion board 15, a sensor acquisition circuit expansion board 16 and a second external interface 17; the acquisition module 10 is used to communicate with the main control module 9, and transmits the processed parameters to the main control module 9 by obtaining and setting FPGA parameters; it is also used for data acquisition, including collecting vibration acceleration signals, temperature signals, current mutual inductance signals, noise signals, liquid level signals, voltage signals, escalator's own 485 communication signals, displacement signals, torque signals, and finally transmitting them to the platform through Gigabit Ethernet through ARM to provide real-time data; the acquisition module 10 is also used to process data and set data parameters.

[0027] The WeChat applet based on terminal control operation communicates with the background by linking to the background server, reads data and displays data by setting the parameters of the applet; communicates with the background by setting the relevant parameters of the applet, and sends down the parameters of the collector.

[0028] like Figure 2As shown, a 30-channel ICP vibration acceleration sensor module 18 is controlled and connected to the acquisition module 10 through an 8ICP vibration acceleration module interface 19, four 8-channel AD conversion circuits 20. A 12-channel current transformer detection module 21 is controlled and connected to the acquisition module 10 through a current transformer detection interface 22, three 8-channel AD conversion circuits 23. A 4-channel temperature sensor detection module 24 is controlled and connected to the acquisition module 10 through an infrared temperature sensor detection interface 25, three 8-channel AD conversion circuits 23. A 4-channel external voltage input detection module 26 is controlled and connected to the acquisition module 10 through an external voltage input detection interface 27, three 8-channel AD conversion circuits 23. A 4-channel noise sensor module 28 is controlled and connected to the acquisition module 10 through a noise sensor detection module interface 29, a 4-channel AD conversion circuit 30.

[0029] The acquisition module 10 is also connected to the following four sensor modules, namely: a 4-way liquid level sensor module 31 , a 4-way rotation speed sensor module 32 , a 2-way displacement sensor module 33 and a 2-way torque sensor module 34 .

[0030] The temperature signal acquisition process is described in detail below.

[0031] An infrared temperature sensor is used to output a 4-20mA DC current signal. After the device is powered on, the infrared temperature sensor starts working. After receiving the control command from the main control module, the acquisition module synchronously opens the used AD channels, including the infrared sensor acquisition channel. Since the signal output by the infrared sensor is a DC current signal and the sensor itself has a certain driving ability, the current signal is directly converted into a voltage signal through a resistor. At the same time, in order to ensure the accuracy of AD data acquisition, a voltage follower is added after the resistor to improve the driving ability and isolation. The original signal of the infrared sensor passes through the conditioning circuit of the resistor and the voltage follower, and then enters the AD conversion circuit to realize analog-to-digital conversion. After passing through the acquisition module, the data is transmitted to the main control module. After processing the data, the data is transmitted to the background server by wired and wireless methods.

[0032] The following is a detailed description of the vibration acceleration collection process.

[0033] A three-axis acceleration sensor is used, and the output signal is 12V DC and ±8V AC signal. After the device is powered on, the three-axis acceleration sensor starts to work. After receiving the control command from the main control module, the acquisition module synchronously opens the used AD channels, including the three-axis acceleration sensor acquisition channel. Since the output voltage amplitude of the acceleration sensor is large, the signal is first filtered by a high-pass filter, and the voltage is scaled on this basis. A bias circuit is added after the high-pass filter. Since AD ​​cannot read negative voltage, the signal is converted into a positive half-cycle signal. At the same time, in order to ensure the accuracy of AD data acquisition, a voltage follower is added after the bias circuit to improve the driving capability and isolation. After that, the signal enters the AD conversion circuit to realize analog-to-digital conversion. After passing through the acquisition module, the data is transmitted to the main control module. After processing the data, the data is transmitted to the background server using wired and wireless methods.

Claims

1. An escalator data acquisition device, characterized in that: The invention comprises a housing (1), wherein the housing (1) comprises a circuit board (7), an alarm switch (2), a wire (4) for communication and a sensor interface (6); the circuit board (7) comprises at least one power conversion module (8) for connecting to a power conversion module, a main control module (9) and a collection module (10); the main control module (9) comprises an ARM core board, an ARM expansion board and a first external interface; and the collection module (10) comprises an FPGA core board, an FPGA expansion board, a sensor collection circuit expansion board and a second external interface.

2. An escalator data acquisition device according to claim 1, characterized in that: The acquisition module (10) is connected to the sensor via an AD conversion circuit and a sensor detection interface.

3. The escalator data acquisition device according to claim 1, characterized in that: The housing (1) comprises a signal isolator (35) connected to the ARM core board and used for maintaining signal stability during signal transmission.

4. The escalator data acquisition device according to claim 1, characterized in that: The housing (1) comprises a WIFI module or a Bluetooth module (37) which is connected to the ARM core board.

5. The escalator data acquisition device according to claim 1, characterized in that: The housing (1) comprises a CAN interface (39) and an SPI interface (40).

6. A method for collecting data from an escalator using the collection device according to claim 1, characterized in that: The following steps are involved: S1: The backend server sends a collection command, and the main control module (9) accepts the command and completes the task; S2: The main control module (9) sends a control command to the acquisition module (10) to open the AD channel; S3: The sensor sends a data signal which is converted into digital form through an AD conversion circuit; S4: The data after analog-to-digital conversion passes through the acquisition module (10), and the acquisition module (10) transmits the data to the main control module (9); S5: After processing the data, the main control module (9) transmits the data to the backend server by wired or wireless means.

7. The escalator data collection method according to claim 6, characterized in that: The data after the analog-to-digital conversion in step S4 is filtered by the acquisition module (10) and then transmitted to the main control module (9).

8. The escalator data collection method according to claim 6, characterized in that: In step S5, the main control module (9) processes the data, including screening the data to extract the maximum value and the minimum value, and judging whether the data is abnormal according to the alarm threshold.

9. The escalator data collection method according to claim 6, characterized in that: The main control module (9) and the acquisition module (10) realize data transmission via a gigabit network cable.

10. The escalator data collection method according to claim 6, characterized in that: The backend server is linked to a WeChat applet based on terminal control, and data is read and displayed through the applet.

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