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Hope all of this makes sense...

I record torque applied to bolts as part of an evaluation process of new materials. I have a rotary encoder, it pulses at 100ppr. My torque wrench gearing means 1 turn of the wrench = 1400 pulses. For each pulse from the encoder, I record a torque value derived from a 4-20mA transmitter measuring hydraulic pressure. The torque readings are saved to a csv file. There may be as many as 15,000 readings in the csv, and multiple (>300) csv files to replay. From this data plus time, I can derive torque/turn and RPM data, no problem.

I want to do some training with other operators, so can anyone recommend a system to read in my csv (SD Card) and replay it into the data acquisition system?

The electronics interface side (transmitter and pulse counter) is almost there, AD5667 DAC plus some circuitry to give 4-20mA plus an SSR to give the pulses.

Replay of the csv data is the stumbling block for me with so many options i.e. raspberry pi, beaglebone etc. The simplest option seems to be the arduino platform however it does not seem to provide sufficient memory to read the csv into an array.

So basically replaying acquired data back into the DAQ system for training/simulation purposes.

Any thoughts would be appreciated.

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  • \$\begingroup\$ What sample rate(s) did you have in mind? You should re-word this question to be less of a shopping question. \$\endgroup\$ – Spehro Pefhany Mar 28 at 18:34
  • \$\begingroup\$ are you saying that you want to replace the torque wrench with a device that emulates the torque wrench and sends out pre-recorded wrench sensor data? ..... how would you use that to train someone? \$\endgroup\$ – jsotola Mar 29 at 0:10
  • \$\begingroup\$ Sample rate would be up to max 1kHz. \$\endgroup\$ – Andrew Pratt Mar 29 at 3:40
  • \$\begingroup\$ I want to replay previously recorded data so I guess a torque wrench emulator is right. Training is provided by seeing the display as the testing proceeds and depending on the profile as it comes in several conditions may be identified that warrants stopping at test early i.e. galling threads, crossed threads, damaged threads. \$\endgroup\$ – Andrew Pratt Mar 29 at 3:42
  • \$\begingroup\$ what kind of a display are you talking about? .... is it very specialized? ..... perhaps it may be easier to duplicate it with something like an arduino and then have the arduino display the content of the SD card \$\endgroup\$ – jsotola Mar 29 at 9:49

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