Tires usually lose a pound or two of pressure per month and will lose even more when the weather is very warm. This can go unnoticed by drivers for long periods of time; therefore, tpms became a standard feature in all lightweight vehicles in the US. A tire pressure monitor will continually monitor the air pressure in the tires and when a tire is detected to have below the recommended level of air pressure it will alert the driver through a symbol lighting up on the dashboard.
How it Works
To understand how a tire pressure monitor system works an explanation of the different components of it is necessary. This will break everything down and make it seem much less complicated. So for this purpose you can find information here that how tpms work.
- An overview of the monitor system: The tire pressure monitor is located on the tire so that it can accurately read the air pressure and report this data back to the driver. When there is a problem with the air pressure it is featured on the dashboard via a lit up icon that is very visible to the driver. Then there is the remote sensing module which includes four different components: the pressure sensor, signal processor, RF transmitter and temperature sensor. The system also has a battery which acts as the power supply for the whole system.
- Remote Sensing Module: The RSM is a self-contained device. It is in charge of controlling all of the different functions of the system. So that it doesn’t have to be the sole device controlling several functions, Motorola provides a tpms sensor and a RF transmitter to undertake the individual functions.
- Tire pressure monitor sensor: The different functions of this sensor sound quite complicated but they all work together to provide the most important tasks. This sensor conserves energy by using the standby mode. It has four different modes which are all controlled by the microcontroller. The pressure measurement mode works with the pressure cell and the C to V converter to activate the temperature cell. The sensor has built-in memory which holds the data, and an ADC which sends the data it receives to the controller. There is a read mode which equips measurements to be placed in what is known as a sampling capacitor where they will be stored.
- Microcontroller: The microcontroller is a combination of the RF transmitter and an HC08 micro. These two things are used as an instrument to permit the technicians to keep the tire pressure monitor functioning smoothly by allowing software to be installed. The RF transmitter is PLL based which means that it has two different modulations. In addition, it has a transmission rate that is able to configure a high level of baud (a unit used to measure levels of transmissions) and it can generate different carriers as well.
Hopefully this analysis of tire pressure sensors makes the role that they play more clear and straightforward. If not then our post http://www.michiganwheelandtire.com/ to get more idea about it.Rather than using difficult to understand technological jargon this article provides understandable vocabulary and a condensed version of the different functions of each component.