How does a power sensor work?
The power sensor is now available to all cycling and triathlon enthusiasts. Once reserved for professional competitors, it has become a key element to better understand yourself during exercise and therefore improve your performance. Thanks to precise measurements, it supports you in your progress and helps you surpass yourself during your training, but also during your road bike, mountain bike or triathlon races.
- How does a power sensor work?
- What are the different types of sensors on the market?
- Follow the leader.
What is a power sensor?
This is a real on-board computer that measures the effort and power deployed during your training or during your competitions. Depending on the model, the data collected also makes it possible to
evaluate the pedaling cadence , energy consumption, speed or even heart rate. These elements are immediately reproduced on the meter placed on your handlebars. In addition, the power sensor is a
tool that allows you to surpass yourself . And for good reason, being able to accurately monitor your performance helps you know your limits and push them back little by little by maintaining the desired power for longer. In addition, the
power sensor allows you to progress and
adjust your training by carrying out your sessions with more precision. Used during a cycling or triathlon race, this technological equipment allows the athlete to better manage their effort in order to optimize their performance. In order to know precisely their power and pedaling cadence to best adapt to the courses and external conditions, it is important to collect data in different training situations: uphill, downhill or flat. It is also wise to carry out these courses in various weather conditions.
How does a power sensor work?
Subject only to the action of the cyclist, power is a stable and very reliable value. Expressed in watts, it is calculated with the following formula: Power (Watts) = Torque (Newton. Meter) x angular speed. Power sensor technology is based on the measurement of deformations or extensometry. More precisely, power is measured using strain gauges that are slightly deformed by the support of the legs during pedaling. The power expressed has the advantage of not being altered by external parameters, such as changes in temperature, fatigue or pre-competitive stress. Data transmission is done using an ANT+ and/or Bluetooth protocol whose compatibility is ensured on most GPS meters on the market (Garmin, Polar, Wahoo, etc.). It is also possible to view your performance via the dedicated application of the sensor you have chosen.
What are the different types of sensors?
Today, there is a wide range of power sensors that adapt to your needs and your budget. Among the best brands on the market, we find Favero, Garmin or Wahoo.
Power sensor in the crankset
This is the most used sensor by cyclists. Very effective, it measures the force as close as possible to the pressure point. This precision is a significant advantage in reading the data. It also justifies its price, higher than other types of power sensors on the market.
Power sensor in the rear hub
This type of sensor, placed on the rear wheel, is made up of several strain gauges. Its main advantage: it is particularly practical if you use several bikes. Indeed, it can be exchanged without having to disassemble the assembly.
Power sensor in the pedals
Very common, this type of sensor can be quickly changed from one bike to another thanks to its ease of adjustment. It collects information on power and balance, but also on pedaling dynamics. It also allows you to obtain different data for each leg.
Power sensor in the crank
This type of power sensor has the advantage of being very easy to install. It can be used single-sided or double-sided. The first option guarantees less accurate data, since it measures the power of only one leg. It is therefore advisable to opt for double-sided equipment for greater reliability.
Power sensor on the crank star
More accurate than a sensor in the crank, it collects power data from both legs. You can thus measure left-right balance. Its assembly is easy and quick. If the operation of a power sensor is based on the same calculation for all models, the data collected is more or less accurate depending on its location on your bike. In addition, the battery life varies. You must therefore define your requirements and objectives in advance to make the best choice.
