Sensor and rolling bearing apparatus with sensor
A rolling bearing apparatus with sensor includes a sensor unit retaining a plurality of types of sensors for detecting the status of a rolling bearing, in a single holder. The plurality of types of sensors are at least two types of sensors of a rotation speed sensor, a temperature sensor, and an acceleration sensor.
1. A bearing apparatus, comprising:
a sensor for a bearing, comprising:
a sensor being incorporated into the bearing or its surroundings, wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing, and
an output voltage characteristic of the temperature sensor is linearized within a temperature range of from 0° C. to 200° C.; and
at least one of a rotation speed sensor and a vibration sensor.
2. The bearing apparatus according to claim 1 , further comprising:
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit.
3. The bearing apparatus according to claim 2 , wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage.
4. An abnormality determining apparatus for an axle bearing, comprising:
a bearing apparatus according to claim 1 .
5. A bearing apparatus, comprising:
a sensor for a bearing comprising:
a sensor being incorporated into the bearing or its surroundings,
wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing and one of more fixed resistors is connected to the sensor; and
at least one of a rotation speed sensor and a vibration sensor.
6. The bearing apparatus according to claim 5 , further comprising:
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit.
7. The bearing apparatus according to claim 6 , wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage.
8. An abnormality determining apparatus for an axle bearing, comprising:
a bearing apparatus according to claim 5 .
9. A bearing apparatus, comprising:
a sensor for a bearing comprising:
a sensor being incorporated into the bearing or its surroundings,
wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing,
one or more fixed resistors is connected to the sensor, and
the sensor is constructed by a thermistor, and the one or more fixed resistor are connected in parallel with the thermistor; and
at least one of a rotation speed sensor and a vibration sensor.
10. The bearing apparatus according to claim 9 , wherein
the thermistor is constructed by a NTC thermistor having a negative temperature characteristic.
11. The bearing apparatus according to claim 9 , wherein
the thermistor is constructed by one of a PTC thermistor and a silicon thermistor, and
the one of the PTC thermistor and the silicon thermistor has a positive temperature characteristic.
12. The bearing apparatus according to claim 9 , further comprising:
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit.
13. The bearing apparatus according to claim 12 , wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage.
14. An abnormality determining apparatus for an axle bearing, comprising:
a bearing apparatus with the sensor according to claim 9 .
15. A bearing apparatus comprising:
a sensor for a bearing comprising:
a sensor being incorporated into the bearing or its surroundings,
wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing, and
an output voltage characteristic of the temperature sensor is linearized within a temperature range of from 0° C. to 200° C.;
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit, wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage, and
an output V T of the temperature sensor from the temperature detection circuit satisfies the following equations:
V
T
=
R
16
R
16
+
R
T
×
V
S
;
and
R
T
=
R
t
×
R
15
R
t
+
R
15
,
wherein
R 16 is a first resistance value,
R t is an electric resistance value of the thermistor,
R 15 is a second resistance value,
R T is a combined resistance value of the thermistor and the second resistance value, and
V S is a power voltage supplied to the temperature sensor.
16. A bearing apparatus comprising:
a sensor for a bearing comprising:
a sensor being incorporated into the bearing or its surroundings,
wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing, and
one or more fixed resistors is connected to the sensor;
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit,
wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage, and
an output V T of the temperature sensor from the temperature detection circuit satisfies the following equations:
V
T
=
R
16
R
16
+
R
T
×
V
S
;
and
R
T
=
R
t
×
R
15
R
t
+
R
15
,
wherein
R 16 is a first resistance value,
R t is an electric resistance value of the thermistor,
R 15 is a second resistance value,
R T is a combined resistance value of the thermistor and the second resistance value, and
V S is a power voltage supplied to the temperature sensor.
17. A bearing apparatus comprising:
a sensor for a bearing comprising:
a sensor being incorporated into the bearing or its surroundings,
wherein
the sensor is configured to decrease an output voltage in conjunction with an increase of measured temperature,
the sensor is a temperature sensor which detects an abnormality of the bearing,
one or more fixed resistors is connected to the sensor,
the sensor is constructed by a thermistor, and the one or more fixed resistor are connected in parallel with the thermistor,
a temperature detection circuit; and
a cable for connecting the sensor and the temperature detection circuit,
wherein
the temperature detection circuit has a resistor for converting an output of the sensor into a voltage, and
an output V T of the temperature sensor from the temperature detection circuit satisfies the following equations:
V
T
=
R
16
R
16
+
R
T
×
V
S
;
and
R
T
=
R
t
×
R
15
R
t
+
R
15
,
wherein
R 16 is a first resistance value,
R t is an electric resistance value of the thermistor,
R 15 is a second resistance value,
R T is a combined resistance value of the thermistor and the second resistance value, and
V S is a power voltage supplied to the temperature sensor.