en_BA_OXH7_PosCon_TCP_IP.docx
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Baumer Electric AG
Friday, June 15, 2018 12:44:11 PM/tof V1.0 ANW_81184815
Frauenfeld, Switzerland
5.2 Measuring frequency, measuring repeat time, and response time
A complete measurement cycle consists of exposure, calculation, and measuring value display. In order to
increase the measuring speed, process steps are executed simultaneously.
5.2.1
Measuring frequency and measuring repeat time
The time between two exposure times is referred to as measuring repeat time. This time can be converted into
a frequency (Hz), which indicates how many measurement values can be issued by the sensor in one second.
[
] = 1
ℎ
[
]
5.2.2
Automatic exposure control
The color and surface of the object have an influence on the amount of reflected light. A longer exposure time
is required for dark objects than for light objects. The sensor automatically controls the exposure time on the
basis of the amount of light reflected by the object. This slows down the measuring frequency and the
response time. In this case, the degree of slowdown is dependent on the laser class of the sensor.
5.3 Alarm output
The alarm signal is output as a push-pull signal (active high). It is set when the object is outside the measuring
range or the signal quality is insufficient for evaluation. If the signal quality is insufficient, the analog and
switching outputs for 75 measurement cycles are kept at the last valid value. After this time has elapsed, the
analog and switching outputs are set as if an object were at the start of the measuring range.
Response time
Measuring
repeat time
Exposure
Calculation
Measuring value display
NOTE
As soon as the alarm output is active, the analog and switching outputs for 75
measurement cycles are kept at the last valid value.
