DC power monitor

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DC power monitor

• Group CCM
• Project 1.2

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EMERSON

• Emerson is a diversified global manufacturing
  company.
• Provides innovative solutions to customers in the
  following areas
• Process Management
• Industrial Automation
  
• Network Power
• Climate Technologies
• Commercial Residential Solutions ? 

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Goal

• Emerson 24Vdc Monitor.
• This device will monitor for 24Vdc. Upon a
  decrease or increase of 5 of 24Vdc the device
  will record.
• Measurements include
• Amplitude of the voltage
• Duration of the change in voltage
• Time at which the change occurred, and provide a
  waveform of the collected data.
• Remote Access

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Why our Solution?

• Other Devices are costly can be as great as 4000
• These systems can be bulky
• The anticipated sample rate is much lower
• than most commercial products
• Remote Accessible

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Proposal

• The system we consist of
• Protective circuit
• Comparator
• A Step down prior to the ADC
• MAX 1257 ADC
• Aliasing Filter
• Raspberry Pi 2

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The Protection Circuit

• The Protection Circuit will consist of
• A fuse
• Zener diode
• Other possibilities
• A small Breaker

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Raspberry PI 2

• 900MHz quad-core ARM Cortex-A7 CPU
• 1GB RAM
• Ethernet port for remote access
• Micro SD card slot for extra storage
• SPI interface for fast data transfer between ADC
  and the PI
• Low power consumption
• Easily Remote accessible

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MAX1257 Analog to Digital Converter

• 16 channel 12-bit ADC
• 25MHz SPI interface
• 225,000sps( samples per second ) 1 sample per
  4µs
• Low power consumption 2.5mA at 225ksps
• -.3V to 6V analog range.

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Timeline
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Data Processing

• The Raspberry Pi will continuously take values
  from the ADC
• When the comparator sends an interrupt, the PI
  will record the last 100 values into memory along
  with a timestamp
• The comparator will be at logic level 0 when the
  voltage is lt25V
• The comparator will be at logic level 1 when the
  voltage is gt25V

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Remote Access

• Windows Remote Access Using an SSH Client such
  as Putty
• Static IP Address
• By simply typing the IP address
• of the PI into the host name
  
  

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Testing the Power Monitor
The system will be tested using a Pulse
Transformer and a Signal Generator to create and
control spikes in Voltage
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Budget

• Raspberry Pi 2 - 35
• Maxim ADC 1257 25.43
• Pulse Transformer - 4.79
• Bread Board - 4.50
• Misc. (resistors, fuses, wire) - 15
• Total 84.72

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Question ?????

• At this point we will entertain questions