Heart rate monitor - A heart rate monitor is a personal monitoring device for measuring heart rate in real time or record your heart rate during the study later. It is mainly used by players of different types of exercise.
History
Early models consisted of the control box with a set of electrode son attached to the chest. The first heart rate monitor wireless ECG was created in 1977 as a training aid for the national teams of Finnish skiing Cross and the "intensity training" has become a popular concept in athletic circles in the middle 80s, retail sales of wireless personal heart monitors started from 1983 Bui-Cac.
Composition
Modern heart rate monitors usually consist of two elements: a chest strap transmitter and wrist receiver or mobile phone (which is usually used as a watch or a phone). In early plastic straps water or liquid is required for good performance. Later units have used conductive smart fabric with built-in microprocessors which analyze the EKG signal to determine heart rate.
Strapless heart rate monitors now allows the user to just touch two sensors on the screen shows for a few seconds to view their heart rate. It is popular for its convenience and ease of use, even if they do not provide as much detail as monitors which use a chest strap.
The most advanced models provide measures of heart rate variability, activity and breathing rate to assess parameters related to the installation concerned. Sensor fusion algorithms allow these monitors for sensing the base temperature and dehydration
Another style of heart rate monitor replaces the plastic around-chest strap with fabric sensors - the most common are sports bras for women which includes sensors in the fabric.
In the old version, when the pulse is detected, a signal is transmitted, the receiver is used to determine the instantaneous heart rate. This signal can be an impulse radio single or a unique coded signal from the chest strap (such as Bluetooth, ANT, or a low-power radio link), it prevents the receiver from a user using signals from other nearby transmitters (known as crosstalk interference).
The new versions include a microprocessor that continuously monitors the ECG and heart rate calculators, and other parameters. This may include an accelerometer that can detect speed and distance eliminating the need for a device worn feet.
There are a number of types of receiver design, with different characteristics. These include average heart rate during the exercise period, time in a specific heart rate zone, calories burned, breathing rate, high-speed and distance, and detailed logging that can be downloaded to a computer.
