18-07-2013, 02:20 PM
Heart Rate Sensor
[attachment=56697]
Introduction
The Heart Rate Sensor monitors the light level transmitted through the vascular tissue
of the fingertip or the ear lobe and the corresponding variations in light intensities that
occurs as the blood volume changes in the tissue.
The SMARTSENSE unit can detect that the Heart Rate Sensor is connected and the
range it is set to.
Connecting
Hold the Heart Rate Sensor housing with the label showing on the top.
Push one end of the sensor cable (supplied with the SMARTSENSE unit) into the
shaped socket at the end of the Sensor housing with the locating arrow on the
cable facing upwards.
Connect the other end of the sensor cable to the input socket on the
SMARTSENSE unit (with the locating arrow facing upwards).
Insert the jack plug from the finger/ear lobe clip into the jack socket at the end of
the Sensor housing.
The SMARTSENSE unit will detect that the Heart Rate Sensor is connected. If
the currently selected range is not suitable for your investigation, set to the correct
range.
Background
The Heart Rate Sensor is used to measure the cardiovascular pulse wave that is found
throughout the human body. This pulse wave will result in a change in the volume of
arterial blood with each pulse beat. This change in blood volume can be detected in
peripheral parts of the body such as the fingertip or ear lobe using a technique called
Photoplethysmography. The device that detects the signal is called a plethysmograph
(or ‘Pleth’ for short).
Waveform
The heartbeat recorded by the Heart Rate Sensor is smoothed by the passage of blood
through the capillaries and the pressure signal does not resemble the pulse seen in an
electrocardiogram (which is used to record the hearts electrical activity). However, the
periodicity of the signal is unchanged and the Heart Rate Sensor can be effectively used
to detect changes in heart rate.
[attachment=56697]
Introduction
The Heart Rate Sensor monitors the light level transmitted through the vascular tissue
of the fingertip or the ear lobe and the corresponding variations in light intensities that
occurs as the blood volume changes in the tissue.
The SMARTSENSE unit can detect that the Heart Rate Sensor is connected and the
range it is set to.
Connecting
Hold the Heart Rate Sensor housing with the label showing on the top.
Push one end of the sensor cable (supplied with the SMARTSENSE unit) into the
shaped socket at the end of the Sensor housing with the locating arrow on the
cable facing upwards.
Connect the other end of the sensor cable to the input socket on the
SMARTSENSE unit (with the locating arrow facing upwards).
Insert the jack plug from the finger/ear lobe clip into the jack socket at the end of
the Sensor housing.
The SMARTSENSE unit will detect that the Heart Rate Sensor is connected. If
the currently selected range is not suitable for your investigation, set to the correct
range.
Background
The Heart Rate Sensor is used to measure the cardiovascular pulse wave that is found
throughout the human body. This pulse wave will result in a change in the volume of
arterial blood with each pulse beat. This change in blood volume can be detected in
peripheral parts of the body such as the fingertip or ear lobe using a technique called
Photoplethysmography. The device that detects the signal is called a plethysmograph
(or ‘Pleth’ for short).
Waveform
The heartbeat recorded by the Heart Rate Sensor is smoothed by the passage of blood
through the capillaries and the pressure signal does not resemble the pulse seen in an
electrocardiogram (which is used to record the hearts electrical activity). However, the
periodicity of the signal is unchanged and the Heart Rate Sensor can be effectively used
to detect changes in heart rate.