Recording the heart beat of cattle using a differential system of optically pumped magnetometers

Jens Sutter, Oliver Lewis, Clive Robinson, Anthony McMahon, Robert Boyce, Rachel Bragg, Alastair Macrae, Paul Griffin, Erling Riis, Stuart Ingleby

Research output: Contribution to conferencePoster

Abstract

Livestock farming occupies about 30% of the Earth’s habitable surface area with a global value around £1 trillion. This important economic entity relies to a large extend on the health and wellbeing of the animals involved. Besides economic pressure there is also a growing interest of the consumer in the ethical keeping of livestock. Seeking physiological parameters that allow a close assessment of animal wellbeing has identified the animals’ heart beat as a possible parameter to monitor.
The electric signal of the heart muscle excitation and relaxation does also carry a magnetic field component. Reading the magnetic field to query heart beat information does avoid the need for contact electrodes. We use two QuSpin Total Field Magnetometers (QTFM®) in a differential set-up to cancel common mode noise. Using the background noise to time-shift the two signals we optimize signal to noise ratio and record the magnetic heart signal over a noise floor close to 1 pT Hz-1/2 in the 1–100 Hz frequency band. By means of a correlation search algorithm we retrieve the heart rate and the shape of the magnetic heart excitation. Comparison to electro cardiograms shows good correlation.

Conference

ConferenceStrathclyde Innovation Symposium on Optically Pumped Magnetometers
Abbreviated titleSIS OPM 2018
CountryUnited Kingdom
CityGartochan
Period25/09/1826/09/18
Internet address

Fingerprint

cattle
magnetometers
synchronism
recording
livestock
animals
cardiograms
economics
heart rate
background noise
muscles
magnetic fields
excitation
health
signal to noise ratios
electrodes
shift

Keywords

  • optically pumped magnetometer
  • cardiomagnetometry
  • OPM
  • electrocardiogram
  • ECG
  • cattle health monitoring

Cite this

Sutter, J., Lewis, O., Robinson, C., McMahon, A., Boyce, R., Bragg, R., ... Ingleby, S. (2018). Recording the heart beat of cattle using a differential system of optically pumped magnetometers. Poster session presented at Strathclyde Innovation Symposium on Optically Pumped Magnetometers , Gartochan, United Kingdom.
Sutter, Jens ; Lewis, Oliver ; Robinson, Clive ; McMahon, Anthony ; Boyce, Robert ; Bragg, Rachel ; Macrae, Alastair ; Griffin, Paul ; Riis, Erling ; Ingleby, Stuart. / Recording the heart beat of cattle using a differential system of optically pumped magnetometers. Poster session presented at Strathclyde Innovation Symposium on Optically Pumped Magnetometers , Gartochan, United Kingdom.1 p.
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title = "Recording the heart beat of cattle using a differential system of optically pumped magnetometers",
abstract = "Livestock farming occupies about 30{\%} of the Earth’s habitable surface area with a global value around £1 trillion. This important economic entity relies to a large extend on the health and wellbeing of the animals involved. Besides economic pressure there is also a growing interest of the consumer in the ethical keeping of livestock. Seeking physiological parameters that allow a close assessment of animal wellbeing has identified the animals’ heart beat as a possible parameter to monitor.The electric signal of the heart muscle excitation and relaxation does also carry a magnetic field component. Reading the magnetic field to query heart beat information does avoid the need for contact electrodes. We use two QuSpin Total Field Magnetometers (QTFM{\circledR}) in a differential set-up to cancel common mode noise. Using the background noise to time-shift the two signals we optimize signal to noise ratio and record the magnetic heart signal over a noise floor close to 1 pT Hz-1/2 in the 1–100 Hz frequency band. By means of a correlation search algorithm we retrieve the heart rate and the shape of the magnetic heart excitation. Comparison to electro cardiograms shows good correlation.",
keywords = "optically pumped magnetometer, cardiomagnetometry, OPM, electrocardiogram, ECG, cattle health monitoring",
author = "Jens Sutter and Oliver Lewis and Clive Robinson and Anthony McMahon and Robert Boyce and Rachel Bragg and Alastair Macrae and Paul Griffin and Erling Riis and Stuart Ingleby",
year = "2018",
month = "9",
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note = "Strathclyde Innovation Symposium on Optically Pumped Magnetometers , SIS OPM 2018 ; Conference date: 25-09-2018 Through 26-09-2018",
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Sutter, J, Lewis, O, Robinson, C, McMahon, A, Boyce, R, Bragg, R, Macrae, A, Griffin, P, Riis, E & Ingleby, S 2018, 'Recording the heart beat of cattle using a differential system of optically pumped magnetometers' Strathclyde Innovation Symposium on Optically Pumped Magnetometers , Gartochan, United Kingdom, 25/09/18 - 26/09/18, .

Recording the heart beat of cattle using a differential system of optically pumped magnetometers. / Sutter, Jens; Lewis, Oliver; Robinson, Clive; McMahon, Anthony; Boyce, Robert; Bragg, Rachel; Macrae, Alastair; Griffin, Paul; Riis, Erling; Ingleby, Stuart.

2018. Poster session presented at Strathclyde Innovation Symposium on Optically Pumped Magnetometers , Gartochan, United Kingdom.

Research output: Contribution to conferencePoster

TY - CONF

T1 - Recording the heart beat of cattle using a differential system of optically pumped magnetometers

AU - Sutter, Jens

AU - Lewis, Oliver

AU - Robinson, Clive

AU - McMahon, Anthony

AU - Boyce, Robert

AU - Bragg, Rachel

AU - Macrae, Alastair

AU - Griffin, Paul

AU - Riis, Erling

AU - Ingleby, Stuart

PY - 2018/9/25

Y1 - 2018/9/25

N2 - Livestock farming occupies about 30% of the Earth’s habitable surface area with a global value around £1 trillion. This important economic entity relies to a large extend on the health and wellbeing of the animals involved. Besides economic pressure there is also a growing interest of the consumer in the ethical keeping of livestock. Seeking physiological parameters that allow a close assessment of animal wellbeing has identified the animals’ heart beat as a possible parameter to monitor.The electric signal of the heart muscle excitation and relaxation does also carry a magnetic field component. Reading the magnetic field to query heart beat information does avoid the need for contact electrodes. We use two QuSpin Total Field Magnetometers (QTFM®) in a differential set-up to cancel common mode noise. Using the background noise to time-shift the two signals we optimize signal to noise ratio and record the magnetic heart signal over a noise floor close to 1 pT Hz-1/2 in the 1–100 Hz frequency band. By means of a correlation search algorithm we retrieve the heart rate and the shape of the magnetic heart excitation. Comparison to electro cardiograms shows good correlation.

AB - Livestock farming occupies about 30% of the Earth’s habitable surface area with a global value around £1 trillion. This important economic entity relies to a large extend on the health and wellbeing of the animals involved. Besides economic pressure there is also a growing interest of the consumer in the ethical keeping of livestock. Seeking physiological parameters that allow a close assessment of animal wellbeing has identified the animals’ heart beat as a possible parameter to monitor.The electric signal of the heart muscle excitation and relaxation does also carry a magnetic field component. Reading the magnetic field to query heart beat information does avoid the need for contact electrodes. We use two QuSpin Total Field Magnetometers (QTFM®) in a differential set-up to cancel common mode noise. Using the background noise to time-shift the two signals we optimize signal to noise ratio and record the magnetic heart signal over a noise floor close to 1 pT Hz-1/2 in the 1–100 Hz frequency band. By means of a correlation search algorithm we retrieve the heart rate and the shape of the magnetic heart excitation. Comparison to electro cardiograms shows good correlation.

KW - optically pumped magnetometer

KW - cardiomagnetometry

KW - OPM

KW - electrocardiogram

KW - ECG

KW - cattle health monitoring

M3 - Poster

ER -

Sutter J, Lewis O, Robinson C, McMahon A, Boyce R, Bragg R et al. Recording the heart beat of cattle using a differential system of optically pumped magnetometers. 2018. Poster session presented at Strathclyde Innovation Symposium on Optically Pumped Magnetometers , Gartochan, United Kingdom.