Methods and systems for the industrial internet of things
The system generally includes a crosspoint switch in a local data collection system having multiple inputs and multiple outputs including a first input connected to a first sensor and a second input connected to a second sensor. The multiple outputs include a first output and a second output configured to be switchable between a condition in which the first output is configured to switch between delivery of a first sensor signal and a second sensor signal and a condition in which there is simultaneous delivery of the first sensor signal and the second sensor signal. Each of multiple inputs is configured to be individually assigned to any of the multiple outputs. The local data collection system includes multiple data acquisition units each having an onboard card set configured to store calibration information and maintenance history. The local data collection system is configured to manage data collection bands.
1. A method for data collection, processing, and utilization of signals with a platform monitoring at least a first element in a first machine in an industrial environment, the method comprising:
obtaining, automatically with a computing environment, at least a first sensor signal and a second sensor signal with a local data collection system that monitors at least the first machine;
connecting a first input of a crosspoint switch of the local data collection system to a first sensor and a second input of the crosspoint switch to a second sensor in the local data collection system;
switching between a condition in which a first output of the crosspoint switch alternates between delivery of at least the first sensor signal and the second sensor signal and a condition in which there is simultaneous delivery of the first sensor signal from the first output and the second sensor signal from a second output of the crosspoint switch;
continuously monitoring at least a third input of the crosspoint switch with an alarm having a pre-determined trigger condition when the third input is unassigned to any of multiple outputs on the crosspoint switch; and
obtaining long blocks of data at a single relatively high-sampling rate with the local data collection system as opposed to multiple sets of data taken at different sampling rates.
2. The method of claim 1 wherein the first sensor signal and the second sensor signal are continuous vibration data from the industrial environment.
3. The method of claim 1 wherein the second sensor in the local data collection system is connected to the first machine.
4. The method of claim 1 wherein the second sensor in the local data collection system is connected to a second machine in the industrial environment.
5. The method of claim 1 further comprising comparing, automatically with the computing environment, relative phases of the first and second sensor signals.
6. The method of claim 1 wherein the first sensor is a single-axis sensor and the second sensor is a three-axis sensor.
7. The method of claim 1 wherein at least the first input of the crosspoint switch includes internet protocol front-end signal conditioning for improved signal-to-noise ratio.
8. The method of claim 1 wherein the local data collection system includes multiple multiplexing units and multiple data acquisition units receiving multiple data streams from multiple machines in the industrial environment.
9. The method of claim 8 wherein the local data collection system includes distributed complex programmable hardware device (CPLD) chips each dedicated to a data bus for logic control of the multiple multiplexing units and the multiple data acquisition units that receive the multiple data streams from the multiple machines in the industrial environment.
10. The method of claim 1 wherein the local data collection system provides high-amperage input capability using solid state relays.
11. The method of claim 9 further comprising powering down at least one of an analog sensor channel and a component board of the local data collection system.
12. The method of claim 1 wherein the local data collection system includes an external voltage reference for an A/D zero reference that is independent of a voltage of the first sensor and the second sensor.
13. The method of claim 1 wherein the local data collection system includes a phase-lock loop band-pass tracking filter that obtain slow-speed RPMs and phase information.
14. The method of claim 1 further comprising digitally deriving phase using on-board timers relative to at least one trigger channel and at least one of multiple inputs on the crosspoint switch.
15. The method of claim 1 further comprising auto-scaling with a peak-detector using a separate analog-to-digital converter for peak detection.
16. The method of claim 1 further comprising routing at least one trigger channel that is one of raw and buffered into at least one of multiple inputs on the crosspoint switch.
17. The method of claim 1 further comprising increasing input oversampling rates with at least one delta-sigma analog-to-digital converter to reduce sampling rate outputs and to minimize anti-aliasing filter requirements.
18. The method of claim 8 wherein the distributed CPLD chips each dedicated to the data bus for logic control of the multiple multiplexing units and the multiple data acquisition units includes as high-frequency crystal clock reference divided by at least one of the distributed CPLD chips for at least one delta-sigma analog-to-digital converter to achieve lower sampling rates without digital resampling.
19. The method of claim 1 wherein the single relatively high-sampling rate corresponds to a maximum frequency of about forty kilohertz.
20. The method of claim 1 wherein the long blocks of data are for a duration that is in excess of one minute.
21. The method of claim 1 wherein the local data collection system includes multiple data acquisition units each having an onboard card set that store calibration information and maintenance history of a data acquisition unit in which the onboard card set is located.