Tech Briefs Magazine - October 2021 - ST-16
Applications
10
-10
-20
-30
-40
-50
-60
-70
-80
10
100
1000
Frequency (Hz)
Figure 2. Frequency domain vibration signal. (TE Connectivity)
BEARING HOUSING
SPRING LOADED FITTING
CONNECTION HEAD
BEARING RACE
BEARING SHAFT
10000
Figure 3. TE Connectivity model 8911 motormountable
vibration sensor with a piezoelectric
accelerometer and a microcontroller, which
performs an FFT conversion. (TE Connectivity)
BABBITT
1/2 NPT
BEARING SENSOR
CONDUIT THREAD
Figure 3 shows the model 8911 vibration
sensor from TE Connectivity
Sensors Business Unit. It contains a
piezoelectric accelerometer and a microcontroller
that performs an FFT conversion
to a format that customers need. In
addition, this sensor is battery powered
and transmits the data wirelessly over
LoRa frequencies. This eliminates hard
wiring. The sensor can be easily mounted
to a motor with an adhesive, mounting
stud, or a magnetic base. With no
wiring and simple mounting, the sensor
can go from out-of-the-box to full operation
in a very short period of time and at
very low cost.
Figure 4. Bearing temperature sensor assembly. (TE Connectivity)
Temperature Sensors
The two parts of a motor most affected
by high temperatures are bearings and
stator windings. To be effective, sensors
that measure these parameters must be
in intimate physical contact with the
motor parts of interest, so unique
designs are usually required for motor
applications.
Figure 5a. (left) Motor stator windings. Figure 5b. (right) Temperature sensors on stator windings.
(TE Connectivity)
in the motor's life. If these measurements
stay in the same range as the original
data, the motor is in good health. If
frequencies or intensities begin to shift
with time, it's an indication of wear in
16
Cov
parts of the motor and a failure may be
imminent. Repairs can therefore be
scheduled before a failure occurs. This
eliminates catastrophic line shut-downs
and improves manufacturing efficiency.
www.techbriefs.com
ToC
In operation, motor bearings typically
run between 60° - 70°C (140° - 160°F).
When properly loaded and lubricated,
bearings can have extremely long service
life. The most common problem occurs
when lubricants disappear because of
leaks or fail due to ambient overheating.
These failure modes can occur over fairly
long periods of operation - 1000s of
hours. As lubricant is depleted, the
bearing temperature begins to rise and
can be easy to track with a temperature
sensor and analytic software.
Figure 4 shows a spring-loaded NTC
or RTD type temperature sensor that's
Sensor Technology, October 2021
Magnitude (dB)
http://www.techbriefs.com
http://info.hotims.com/79418-936
Tech Briefs Magazine - October 2021
Table of Contents for the Digital Edition of Tech Briefs Magazine - October 2021
Tech Briefs Magazine - October 2021 - Intro
Tech Briefs Magazine - October 2021 - Sponsor
Tech Briefs Magazine - October 2021 - Cov1
Tech Briefs Magazine - October 2021 - Cov2
Tech Briefs Magazine - October 2021 - 1
Tech Briefs Magazine - October 2021 - 2
Tech Briefs Magazine - October 2021 - 3
Tech Briefs Magazine - October 2021 - 4
Tech Briefs Magazine - October 2021 - 5
Tech Briefs Magazine - October 2021 - 6
Tech Briefs Magazine - October 2021 - 7
Tech Briefs Magazine - October 2021 - 8
Tech Briefs Magazine - October 2021 - 9
Tech Briefs Magazine - October 2021 - 10
Tech Briefs Magazine - October 2021 - 11
Tech Briefs Magazine - October 2021 - 12
Tech Briefs Magazine - October 2021 - 13
Tech Briefs Magazine - October 2021 - 14
Tech Briefs Magazine - October 2021 - 15
Tech Briefs Magazine - October 2021 - 16
Tech Briefs Magazine - October 2021 - 17
Tech Briefs Magazine - October 2021 - 18
Tech Briefs Magazine - October 2021 - 19
Tech Briefs Magazine - October 2021 - 20
Tech Briefs Magazine - October 2021 - 21
Tech Briefs Magazine - October 2021 - 22
Tech Briefs Magazine - October 2021 - 23
Tech Briefs Magazine - October 2021 - 24
Tech Briefs Magazine - October 2021 - 25
Tech Briefs Magazine - October 2021 - 26
Tech Briefs Magazine - October 2021 - 27
Tech Briefs Magazine - October 2021 - 28
Tech Briefs Magazine - October 2021 - 29
Tech Briefs Magazine - October 2021 - 30
Tech Briefs Magazine - October 2021 - 31
Tech Briefs Magazine - October 2021 - 32
Tech Briefs Magazine - October 2021 - 33
Tech Briefs Magazine - October 2021 - 34
Tech Briefs Magazine - October 2021 - 35
Tech Briefs Magazine - October 2021 - 36
Tech Briefs Magazine - October 2021 - 37
Tech Briefs Magazine - October 2021 - 38
Tech Briefs Magazine - October 2021 - 39
Tech Briefs Magazine - October 2021 - 40
Tech Briefs Magazine - October 2021 - 41
Tech Briefs Magazine - October 2021 - 42
Tech Briefs Magazine - October 2021 - 43
Tech Briefs Magazine - October 2021 - 44
Tech Briefs Magazine - October 2021 - 45
Tech Briefs Magazine - October 2021 - 46
Tech Briefs Magazine - October 2021 - 47
Tech Briefs Magazine - October 2021 - 48
Tech Briefs Magazine - October 2021 - 49
Tech Briefs Magazine - October 2021 - 50
Tech Briefs Magazine - October 2021 - 51
Tech Briefs Magazine - October 2021 - 52
Tech Briefs Magazine - October 2021 - 53
Tech Briefs Magazine - October 2021 - 54
Tech Briefs Magazine - October 2021 - 55
Tech Briefs Magazine - October 2021 - 56
Tech Briefs Magazine - October 2021 - Cov3
Tech Briefs Magazine - October 2021 - Cov4
Tech Briefs Magazine - October 2021 - CN-Cov1
Tech Briefs Magazine - October 2021 - 2a
Tech Briefs Magazine - October 2021 - 3a
Tech Briefs Magazine - October 2021 - 4a
Tech Briefs Magazine - October 2021 - 5a
Tech Briefs Magazine - October 2021 - 6a
Tech Briefs Magazine - October 2021 - 7a
Tech Briefs Magazine - October 2021 - 8a
Tech Briefs Magazine - October 2021 - 9a
Tech Briefs Magazine - October 2021 - 10a
Tech Briefs Magazine - October 2021 - 11a
Tech Briefs Magazine - October 2021 - 12a
Tech Briefs Magazine - October 2021 - 13a
Tech Briefs Magazine - October 2021 - 14a
Tech Briefs Magazine - October 2021 - 15a
Tech Briefs Magazine - October 2021 - 16a
Tech Briefs Magazine - October 2021 - 17a
Tech Briefs Magazine - October 2021 - 18a
Tech Briefs Magazine - October 2021 - 19a
Tech Briefs Magazine - October 2021 - 20a
Tech Briefs Magazine - October 2021 - 21a
Tech Briefs Magazine - October 2021 - 22a
Tech Briefs Magazine - October 2021 - 23a
Tech Briefs Magazine - October 2021 - 24a
Tech Briefs Magazine - October 2021 - 25a
Tech Briefs Magazine - October 2021 - 26a
Tech Briefs Magazine - October 2021 - 27a
Tech Briefs Magazine - October 2021 - 28a
Tech Briefs Magazine - October 2021 - 29a
Tech Briefs Magazine - October 2021 - 30a
Tech Briefs Magazine - October 2021 - 31a
Tech Briefs Magazine - October 2021 - 32a
Tech Briefs Magazine - October 2021 - 33a
Tech Briefs Magazine - October 2021 - 34a
Tech Briefs Magazine - October 2021 - 35a
Tech Briefs Magazine - October 2021 - 36a
Tech Briefs Magazine - October 2021 - 37a
Tech Briefs Magazine - October 2021 - 38a
Tech Briefs Magazine - October 2021 - 39a
Tech Briefs Magazine - October 2021 - 40a
Tech Briefs Magazine - October 2021 - 41a
Tech Briefs Magazine - October 2021 - 42a
Tech Briefs Magazine - October 2021 - 43a
Tech Briefs Magazine - October 2021 - 44a
Tech Briefs Magazine - October 2021 - MD-Cov1
Tech Briefs Magazine - October 2021 - MD-Cov2
Tech Briefs Magazine - October 2021 - MD-1
Tech Briefs Magazine - October 2021 - MD-2
Tech Briefs Magazine - October 2021 - MD-3
Tech Briefs Magazine - October 2021 - MD-4
Tech Briefs Magazine - October 2021 - MD-5
Tech Briefs Magazine - October 2021 - MD-6
Tech Briefs Magazine - October 2021 - MD-7
Tech Briefs Magazine - October 2021 - MD-8
Tech Briefs Magazine - October 2021 - MD-8A
Tech Briefs Magazine - October 2021 - MD-8B
Tech Briefs Magazine - October 2021 - MD-8C
Tech Briefs Magazine - October 2021 - MD-8D
Tech Briefs Magazine - October 2021 - MD-9
Tech Briefs Magazine - October 2021 - MD-10
Tech Briefs Magazine - October 2021 - MD-11
Tech Briefs Magazine - October 2021 - MD-12
Tech Briefs Magazine - October 2021 - MD-13
Tech Briefs Magazine - October 2021 - MD-14
Tech Briefs Magazine - October 2021 - MD-15
Tech Briefs Magazine - October 2021 - MD-16
Tech Briefs Magazine - October 2021 - MD-17
Tech Briefs Magazine - October 2021 - MD-18
Tech Briefs Magazine - October 2021 - MD-19
Tech Briefs Magazine - October 2021 - MD-20
Tech Briefs Magazine - October 2021 - MD-21
Tech Briefs Magazine - October 2021 - MD-22
Tech Briefs Magazine - October 2021 - MD-23
Tech Briefs Magazine - October 2021 - MD-24
Tech Briefs Magazine - October 2021 - MD-Cov3
Tech Briefs Magazine - October 2021 - MD-Cov4
Tech Briefs Magazine - October 2021 - ST-Cov1
Tech Briefs Magazine - October 2021 - ST-Cov2
Tech Briefs Magazine - October 2021 - ST-1
Tech Briefs Magazine - October 2021 - ST-2
Tech Briefs Magazine - October 2021 - ST-3
Tech Briefs Magazine - October 2021 - ST-4
Tech Briefs Magazine - October 2021 - ST-5
Tech Briefs Magazine - October 2021 - ST-6
Tech Briefs Magazine - October 2021 - ST-7
Tech Briefs Magazine - October 2021 - ST-8
Tech Briefs Magazine - October 2021 - ST-9
Tech Briefs Magazine - October 2021 - ST-10
Tech Briefs Magazine - October 2021 - ST-11
Tech Briefs Magazine - October 2021 - ST-12
Tech Briefs Magazine - October 2021 - ST-13
Tech Briefs Magazine - October 2021 - ST-14
Tech Briefs Magazine - October 2021 - ST-15
Tech Briefs Magazine - October 2021 - ST-16
Tech Briefs Magazine - October 2021 - ST-17
Tech Briefs Magazine - October 2021 - ST-18
Tech Briefs Magazine - October 2021 - ST-19
Tech Briefs Magazine - October 2021 - ST-20
Tech Briefs Magazine - October 2021 - ST-21
Tech Briefs Magazine - October 2021 - ST-22
Tech Briefs Magazine - October 2021 - ST-23
Tech Briefs Magazine - October 2021 - ST-24
Tech Briefs Magazine - October 2021 - ST-25
Tech Briefs Magazine - October 2021 - ST-26
Tech Briefs Magazine - October 2021 - ST-27
Tech Briefs Magazine - October 2021 - ST-28
Tech Briefs Magazine - October 2021 - ST-29
Tech Briefs Magazine - October 2021 - ST-30
Tech Briefs Magazine - October 2021 - ST-31
Tech Briefs Magazine - October 2021 - ST-32
Tech Briefs Magazine - October 2021 - ST-33
Tech Briefs Magazine - October 2021 - ST-34
Tech Briefs Magazine - October 2021 - ST-35
Tech Briefs Magazine - October 2021 - ST-36
Tech Briefs Magazine - October 2021 - ST-Cov3
Tech Briefs Magazine - October 2021 - ST-Cov4
https://www.nxtbook.com/smg/techbriefs/25TB01
https://www.nxtbook.com/smg/techbriefs/24TB12
https://www.nxtbook.com/smg/techbriefs/24TB11
https://www.nxtbook.com/smg/techbriefs/24TB10
https://www.nxtbook.com/smg/techbriefs/24TB09B
https://www.nxtbook.com/smg/techbriefs/24TB09
https://www.nxtbook.com/smg/techbriefs/24TB08
https://www.nxtbook.com/smg/techbriefs/24TB07
https://www.nxtbook.com/smg/techbriefs/24TB06
https://www.nxtbook.com/smg/techbriefs/24TB05B
https://www.nxtbook.com/smg/techbriefs/24TB05
https://www.nxtbook.com/smg/techbriefs/24TB04
https://www.nxtbook.com/smg/techbriefs/24TB03
https://www.nxtbook.com/smg/techbriefs/24TB02
https://www.nxtbook.com/smg/techbriefs/24TB01
https://www.nxtbook.com/smg/techbriefs/23TB12
https://www.nxtbook.com/smg/techbriefs/23TB11
https://www.nxtbook.com/smg/techbriefs/23TB10
https://www.nxtbook.com/smg/techbriefs/23TB09
https://www.nxtbook.com/smg/techbriefs/23TB08
https://www.nxtbook.com/smg/techbriefs/23TB07
https://www.nxtbook.com/smg/techbriefs/23TB06
https://www.nxtbook.com/smg/techbriefs/23TB05
https://www.nxtbook.com/smg/techbriefs/23TB04
https://www.nxtbook.com/smg/techbriefs/23TB03
https://www.nxtbook.com/smg/techbriefs/23TB02
https://www.nxtbook.com/smg/techbriefs/23TB01
https://www.nxtbook.com/smg/Testing/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB11
https://www.nxtbook.com/smg/techbriefs/22TB10
https://www.nxtbook.com/smg/techbriefs/22TB09
https://www.nxtbook.com/smg/techbriefs/22TB08
https://www.nxtbook.com/smg/techbriefs/22TB07
https://www.nxtbook.com/smg/techbriefs/22TB06
https://www.nxtbook.com/smg/techbriefs/22TB05-P
https://www.nxtbook.com/smg/techbriefs/22TB05-D
https://www.nxtbook.com/smg/techbriefs/22TB04
https://www.nxtbook.com/smg/techbriefs/22TB03
https://www.nxtbook.com/smg/techbriefs/22TB02
https://www.nxtbook.com/smg/techbriefs/22TB01
https://www.nxtbook.com/smg/techbriefs/21TB12
https://www.nxtbook.com/smg/techbriefs/21TB11
https://www.nxtbook.com/smg/techbriefs/21TB10
https://www.nxtbook.com/smg/techbriefs/21TB09
https://www.nxtbook.com/smg/techbriefs/21TB08
https://www.nxtbook.com/smg/techbriefs/21TB07
https://www.nxtbook.com/smg/techbriefs/21TB06
https://www.nxtbook.com/smg/techbriefs/21TB05
https://www.nxtbook.com/smg/techbriefs/21TB04
https://www.nxtbook.com/smg/techbriefs/21BT03
https://www.nxtbook.com/smg/techbriefs/21TB02
https://www.nxtbookmedia.com