資料介紹
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Table of Contents
Pioneer 1 - Wired CbM Evaluation Platform
Overview
The Pioneer 1 - Wired CbM Evaluation Platform provides a robust industrial wired link solution for the ADcmXL3021 Triaxial Vibration Sensor en/products/adcmxl3021.html. The ADcmXL3021 features ultra low noise density (26 μg/√Hz) and wide bandwidth to 10 kHz, which supports excellent measurement resolution and tracking of key vibration signatures. The EV-CbM-Pioneer1-1Z and EV-CbM-Pioneer1-2Z kits provide a complete plug and play solution for operating the ADcmXL3021 on an RS-485 network over meters of cable in harsh industrial environments. This wired evaluation platform is enables monitoring of industrial assets to improve up-time, accelerating the path to Industry 4.0.
EV-CbM-Pioneer1-1Z / EV-CbM-Pioneer1-2Z Kit Features
- Provides 3 different Slave Board designs for ADcmXL3021 attach, which enable system design flexibility. Figure 1 and Table 1 provide details. Slaves 2 and 3 provide a direct SPI to RS-485 link, while Slave 1 includes an microcontroller which provides a UART to RS-485 interface.
- Combines power and data over 1 standard cable, which reduces cable and connector costs at remote Sensor nodes.
- Provides industry standard RJ45/RJ50 cables and connectors which are well shielded for noisy environments, are not bulky, and provide a path to IP67 enviornmental rating for integrated CbM module.
- Includes a Master interface board with multiple connectors for system controller attach.
- Dedicated software GUI enables simple configuration of the ADcmXL3021 device, and vibration data and capture over long cables.
Table 1. Solution Performance Trade Offs
SPI SCLK vs. Cable Length Recommendations
The following guidelines apply for the direct SPI to RS-485 link designs (DEMO-CbM-Slave2-Z and DEMO-CbM-Slave3-Z). The SPI to RS-485/RS-422 link designs include a SPI clock transfer over RS-422 (SCLK) and a power over data lines implementation (phantom power), where data and power share the same twisted pair (SPI MISO).
Cable Effects
- Over long cable runs the SPI SCLK signal will incur a propagation delay through the cable, of the order of 400-500 ns for a 100 m cable.
- For a SPI MOSI data transfer from Master to Slave, the MOSI and SCLK are equally delayed by the cable.
- However, data sent from the slave MISO to the master will be out of sync with SPI SCLK by twice the cable propagation delay.
Maximum SPI SCLK
- Is set by the system propagation delay, which includes cable propagation delay, and Master + Slave Component propagation delays.
Minimum SPI SCLK
Typical Performance
- Typical SPI SCLK rate vs. cable length performance in a Phantom Power network is characterized in Figure 2. This shows DEMO-CbM-Slave3-Z (non-isolated slave) and DEMO-CbM-Slave2-Z (isolated slave)error free performance when porting the ADcmXL3021 SPI output over cabling.
Figure 2. SPI SCLK vs. Cable Length Typical Performance
Getting Started
Equipment
The following is supplied as part of the EV-CbM-Pioneer1-1Z demo kit:
- Master Interface Controller board DEMO-CbM-Master-Z.
- Low complexity non-isolated Slave Sensor interface board DEMO-CbM-Slave3-Z.
- Low complexity isolated Slave Sensor interface board DEMO-CbM-Slave2-Z.
- 2m RJ50 cable (194612-02) and 10m RJ50 cable (194612-10)
- AC/DC Power Supply - EU/UK/US/AU
The following is supplied as part of the EV-CbM-Pioneer1-2Z demo kit:
- All of the EV-CbM-Pioneer1-1Z demo kit contents
- Cypress SuperSpeed Explorer kit (CYUSB3KIT-003) and USB 3.0 cable.
The following equipment is suggested as a vibration source, but not strictly required, as the system can also be tested manually:
- Power supply for the cooling fan
Typical Setup
The following steps describe a typical setup, as shown in Figure 3, to communicate over a SPI to RS-485 link using either DEMO-CbM-Slave2-Z or DEMO-CbM-Slave3-Z:
- Ensure that the following jumper selections are made for the DEMO-CbM-Master-Z: LK8: position A or position B, and LK5 and LK6: Position A. The LK8 jumper needs to be set, but the position is at the user's discretion.
- Connect the supplied 2-meter RJ50 cable to the J10 RJ50 connector on the DEMO-CbM-Master-Z as indicated in Figure 4. Do not confuse this with the RJ45 connector (J1). Inserting RJ50 cable plugs into RJ45 connectors will damage the plug/connector contacts.
- Connect the Cypress Evaluation Board CYUSB3KIT-003 as shown in Figure 4 below. J6 and J7 on the DEMO-CbM-Master-Z align with the like-named J6 and J7 on the CYUSB3KIT-003.
- Connect the supplied 2-meter RJ50 cable to the J10 RJ50 connector on the DEMO-CbM-Slave3-Z (or DEMO-CbM-Slave2-Z).
- Connect the ADcmXL3021 XL module hi-rose connector (male) to the hi-rose connector (female) on the DEMO-CbM-Slave3-Z. Refer to Figure 5 for connector orientation. Ensure that Pin1 on both connectors is aligned as shown.
- Connect the Power Supply to the barrel connector on the DEMO-CbM-Master-Z. The power supply should be set to a minimum of +6 V and a maximum of +12 V. This provides power to both master and slave boards.
- Note: the Master board barrel connector is configured for a positive centre tip power supply. For the demo kit power supply –→ connect the positive centre (+) to the positive centre (+) on the small tip adaptors.
- Connect the USB 3.0 cable supplied with the CYUSB3KIT-003 to a USB 3.0 port on your computer.
Figure 3. Typical Evaluation Setup
Figure 5. Hi-Rose Connector Orientation and S2 Pushbutton Switch
Software Application (GUI)
Software Installation
Two downloads are required, with all software available on the ADcmXL3021 wiki.
- Download and unzip the file called FX3Driver.zip. Then run the DriverSetup.exe file
- Download, unzip, and Run the ADCMXL Evaluation Software, version 2.1.8.
GUI measurements using Typical Setup
- Open the Vibration Evaluation software version 2.1.8 on your computer.
- Open the ‘Comm’ menu and select ‘SPI’. Set the SPI SCLK to 2.5 MHz and hit ‘update’.
- Select Manual Time Capture (MTC) from the Mode Selection drop down menu, and hit the start button.
- For the Typical setup described in Figure 3 – the X, Y, and Z axis MTC measurements are shown in Figure 6.
- The corresponding Manual Fast Fourier Transform (MFFT) measurements are shown in Figure 7.
Figure 6. Typical Manual Time Capture Plot - corresponding to Figure 3 Typical Setup
Figure 7. Typical Manual FFT Plot - corresponding to Figure 3 Typical Setup
GUI measurements for a non-Repetitive Vibration Source
To provide a more easily visible Manual Time Capture (MTC) of a 'finger tap' vibration on the top surface of the ADcmXL3021, access the AVG_CNT register as shown in Figure 8. Write HEX 0x3 to AVG_CNT and perform a read back to confirm the write. This will decimate the signal so that the MTC waveform can be viewed easily. Figure 9 shows an example MTC measurement where a 'finger tap' vibration is applied to the top surface of the ADcmXL3021 module.
Figure 8. Write Hex 0x3 to the AVG_CNT Register to Decimate
Figure 9. Typical Manual Time Capture plot - Finger Tap Vibration Setup
Schematics, Layout, BOM
Schematics, layout, BOM, and Gerber file for the DEMO-CbM-Slave2-Z: click here to download
Schematics, layout, BOM, and Gerber file for the DEMO-CbM-Slave3-Z: click here to download
Schematics, layout, BOM, and Gerber file for the DEMO-CbM-Master-Z: click here to download
Schematics, layout, BOM, and Gerber file for the DEMO-CbM-Expandr-Z: click here to download
Change Log
*July 2019. Initial Release. *August 2019. Added additional information on demo power supply configuration.
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