Tyresense Sensors
The inside of an earth moving
tire was never intended for electronics. Harsh conditions in the tire chamber,
including high pressures, extreme temperatures, and liquid additives such as
rust inhibitors constantly challenge the viability and service life of mining
tires. But it’s in this type of punishing environment where RIMEX TyreSense
wheel sensors actually thrive. As the core component of the TyreSense tire
pressure monitoring system (TPMS), each wheel sensor is individually configured
to a specific tire on each vehicle. The sensors are designed to withstand
extreme internal tire conditions, respond to fluctuations, and transmit precise
pressure and temperature data, up to once every second, within 2% of actual
pressure levels. The patented TyreSense diaphragm sensors are the only
completely liquid-proof sensor in the market and are currently in operation on
10,000+ tire positions.
TyreSense sensors transmit via radio frequency to our
Black Box receiver unit mounted in the cab. The extensive data collection is
sent to a server via wireless mesh network, GSM, or Bluetooth, and can be
accessed through the TyreSense Client software. Additionally, the information
collected can be viewed by the operator through an in-cab display unit.
TyreSense data can also be integrated with most major fleet management
companies, to be monitored by dispatch.
TyreSense revolutionized tire
pressure monitoring by becoming the first system to introduce a magnetic sensor
mounting solution. The reusable TyreSense Magmount permits easy sensor
installation without any modifications to the tire, which reduces labour
requirements and potential vehicle downtime. To learn more, check out the
Magmount Mounting System accessory.
O interior
de um
pneu em
movimento terrestre nunca
foi destinado
à electrónica.
Condições adversas na
câmara dos pneus,
incluindo altas pressões,
temperaturas extremas e
aditivos líquidos, como
inibidores de ferrugem,
desafiam constantemente a viabilidade
e a
vida útil
dos pneus
mineiros. Mas é
neste tipo
de ambiente
de punição onde os
sensores das rodas
RIMEX TyreSense
realmente prosperam. Como
componente principal do
sistema de monitorização
da pressão
dos pneus
TyreSense (TPMS), cada
sensor de rodas
é configurado
individualmente para um
pneu específico
em cada
veículo. Os sensores
são projetados
para suportar
condições internas extremas
de pneus,
responder a flutuações,
e transmitir
dados precisos
de pressão
e temperatura,
até uma
vez a
cada segundo,
dentro de 2%
dos níveis
reais de
pressão.
Os sensores patenteados de diafragma TyreSense são o único sensor completamente à prova de líquido no mercado e estão atualmente em funcionamento em mais de 10.000 posições de pneus. Para garantir o padrão de qualidade e fiabilidade em que a RIMEX se orgulha, todos os sensores TyreSense passam por um extenso processo de fabrico de 6S magros com controlos contínuos de garantia de qualidade. Todos os produtos TyreSense, incluindo os sensores, são projetados, fabricados e montados internamente pela equipa da RIMEX nas nossas instalações canadianas. Os sensores TyreSense transmitem através da frequência de rádio para a nossa unidade recetora Black Box montada na cabine. A extensa recolha de dados é enviada para um servidor através de rede de malha sem fios, GSM ou Bluetooth, e pode ser acedida através do software TyreSense Client. Além disso, as informações recolhidas podem ser visualizadas pelo operador através de uma unidade de exposição na cabina. Os dados da TyreSense também podem ser integrados com a maioria das grandes empresas de gestão de frotas, a serem monitorizados por despacho. O TyreSense revolucionou a monitorização da pressão dos pneus ao tornar-se o primeiro sistema a introduzir uma solução de montagem de sensores magnéticos. O TyreSense Magmount reutilizável permite uma instalação fácil do sensor sem modificações no pneu, o que reduz os requisitos de mão-de-obra e o tempo de inatividade potencial do veículo. Para saber mais, consulte o acessório do Sistema de Montagem de Magmount.
TPMS Basics
A Tire Pressure Monitoring System or TPMS is an electronic
system designed to monitor the air pressure inside the tire. In the Industrial
and Mining sectors, the systems also monitor the air chamber temperature of
each tire along with a host of other features which vary by manufacturer.
A typical TPMS consists of the following components:
battery based wireless sensor/transmitter device, high frequency antenna
module, and a central receiver. The sensors are directly mounted inside the
tires and they are responsible for measuring the tire pressure and temperature
which is then wirelessly transmitted to the server and optionally to an in-cab
receiver in the vehicle. The receiver analyzes every piece of data sent from
the sensors and issues warnings whenever there are abnormalities in pressure
and temperature levels.
TPMS does not replace manual pressure checks, however
relying on manual checks alone is not sufficient to ensure tires are operating
within optimum pressure levels. The following is a list of manual pressure
check limitations:
- Pressure can only be checked when the vehicle is parked.
- Possibility of inaccurate readings due to human error.
- Temperature is not monitored during manual pressure checks.
Each tire manufacturer offers load/inflation tables.
The tables base their cold inflation pressure calculations on the anticipated
maximum weight of the load for the tire size/ply rating. Unfortunately, the
pressure of a tire can change dramatically with the ambient temperature, and
using a static calculation does not account for this. Some TPMS automatically
formulate the calculated cold inflation pressure by taking the tire chamber air
pressure and temperature into account. Click here to find out more about cold inflation.
The following image demonstrates the pressures a tire
will reach when the temperature rises to 75°C / 167°F. In this example, all
three tires were inflated to 110psi at 0°C (left), 20°C (middle), and 40°C
(right).
TKPH versus TPMS
Ton kilometer per hour (TKPH) is the calculation based
on the weight and speed a tire can handle without overheating and causing
damage. When a tire reaches its TKPH rating under operation, it should
theoretically be at its maximum operating temperature (critical temperature).
The critical temperature for a radial tire is approximately 105°C / 221°F and
this temperature is typically found in the tread. To date, the only way to
determine the actual tread temperature is by drilling tires and measuring the
temperature. This is called a heat study.
A heat study, to compare actual belt temperature
levels to the suggested TKPH and to internal sensor readings, was undertaken by
an Australian mine. Four Komatsu 930E trucks which were fitted with 53/80R63
XDR2 B Michelin tires were used. The purpose of the study was to determine
whether the correlation between TKPH and tread readings or tread readings and
internal sensor readings are more accurate. At the conclusion of the study, it
was determined that internal sensor readings offer a better estimation, and
fluctuate closer to the actual tire tread temperature than TKPH readings do.
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