Danfoss Power Solutions Company WMSS1000 ユーザーズマニュアル
Technical Information
WMSS1000 Wireless Multi-Sonic
Sensor
Sensor
• LED power switch and LED indicators for wireless operation and battery level
User Liability and Safety Statement
OEM User Liability and Safety Responsibility
The OEM of a machine or vehicle in which PLUS+1™ compliant product is installed
has the full responsibility for all consequences that might occur. Danfoss has no
responsibility for any consequences, direct or indirect, caused by failures or
malfunctions.
has the full responsibility for all consequences that might occur. Danfoss has no
responsibility for any consequences, direct or indirect, caused by failures or
malfunctions.
• This product is not intended to be used as a stand-alone safety device in safety
critical application.
• Danfoss has no responsibility for any accidents cause by incorrectly mounted or
maintained equipment.
• Danfoss does not assume any responsibility for products being incorrectly
applied or the system being programmed in a manner that jeopardizes safety.
All safety critical systems shall include an emergency stop to switch off the main
supply voltage for the outputs of the electronic control system.
All safety critical systems shall include an emergency stop to switch off the main
supply voltage for the outputs of the electronic control system.
• All safety critical components shall be installed in such a way that the main
supply voltage can be switched off at any time. The emergency stop must be
easily accessible to the operator.
easily accessible to the operator.
Theory of Operation
Wireless sensors provide information to and respond to messages under control of a
wireless hub which uses a proprietary protocol to prevent signal tampering. The
wireless hub is itself wired to the control module and communicates with the control
application using CAN messages.
wireless hub which uses a proprietary protocol to prevent signal tampering. The
wireless hub is itself wired to the control module and communicates with the control
application using CAN messages.
The sensors themselves have six transducers that are sampled one at a time every
10ms (60ms total). Each transducer takes two measurements at each sample cycle:
one for temperature compensation and one for the target measurement.
10ms (60ms total). Each transducer takes two measurements at each sample cycle:
one for temperature compensation and one for the target measurement.
Ultrasonic transducer signals are affected by temperature. To compensate for
temperature errors, these sensors use a temperature bail mounted in the path of the
transducer that runs the entire length of the sensor. This makes it accessible to each
individual transducer and allows for excellent temperature compensation and allows
the sensor to respond to fluctuations caused by wind gusts and vehicle exhaust.
This also allows for an overall faster sensor response time since no breaks in
measurements are needed to account for temperature compensation readings.
temperature errors, these sensors use a temperature bail mounted in the path of the
transducer that runs the entire length of the sensor. This makes it accessible to each
individual transducer and allows for excellent temperature compensation and allows
the sensor to respond to fluctuations caused by wind gusts and vehicle exhaust.
This also allows for an overall faster sensor response time since no breaks in
measurements are needed to account for temperature compensation readings.
When the transducer sends out a signal, the signal first hits the temperature bail and
provides an echo that is reflected back to the transducer. The signal then continues
on to the target and a second echo is reflected back to the transducer. Because the
distance to the bail is constant, it can be used to compensate the second echo for
temperature errors.
provides an echo that is reflected back to the transducer. The signal then continues
on to the target and a second echo is reflected back to the transducer. Because the
distance to the bail is constant, it can be used to compensate the second echo for
temperature errors.
The sensor can detect when the temperature bail is not present and sends a
message to the system application that temperature compensation is not available
message to the system application that temperature compensation is not available
SHORT TERM CONFIDENTIAL