Temperature probe

Patent metadata

Field	Value
Publication number	US-11221257-B2
Application number	US-201515537909-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 23, 2014
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

The invention relates to a temperature probe (10) comprising a temperature-dependent measuring element (ME), which measuring element (ME) can be contacted via at least a first connecting line (1) and at least a second connecting line (2), the first connecting line (1) having a first and a second portion (T1, T2), and the first and the second portions (T1, T2) consisting of different materials.

First claim

The invention claimed is:

1. A temperature probe, comprising:
a temperature-dependent resistor;
a first connection cable having a first section embodied of a first metal and a second section embodied of a second metal;
a second connection cable embodied of the first metal; and
a fitting,
wherein the second section of the first cable is arranged between the temperature-dependent resistor and the first section of the first cable and wherein the second section of the first cable and the second cable contact the temperature-dependent resistor,
wherein the first and the second connection cables extend along the fitting up to the temperature-dependent resistor,
wherein the first section of the first connection cable runs along said fitting, the second section runs along said fitting, and the first and the second sections do not overlap, and
wherein the first and the second sections of the first connection cable form a thermocouple.

2. The temperature probe according to claim 1 , wherein the second section of the first connection cable is connected to the second connection cable via the temperature-dependent resistor.

3. The temperature probe according to claim 1 , wherein the second connection cable is connected directly to the second section of the first connection cable.

4. The temperature probe according to claim 1 , wherein the second section extends along a part of the fitting located between the temperature-dependent resistor and the first section of the first connection cable.

5. The temperature probe according to claim 1 , wherein the second connection cable extends along a fitting up to the temperature-dependent resistor or a contact device of the temperature-dependent resistor.

6. The temperature probe according to claim 1 , wherein the temperature-dependent resistor includes a first contact device and a second contact device, wherein the second section of the first connection cable and the second connection cable are connected to the first contact device.

7. The temperature probe according to claim 6 , further comprising:
a third connection cable connected to the second contact device.

8. The temperature probe according to claim 7 , further comprising:
a fourth connection cable connected to the second contact device.

9. The temperature probe according to claim 8 , wherein the fourth connection cable is made of the same metal as the first section of the first connection cable and/or the same metal as the second connection cable and/or the same metal as the third connection cable.

10. The temperature probe according to claim 7 , wherein the third connection cable is made of the same metal as the first section of the first connection cable and/or the same metal as the second connection cable.

11. A thermometer with a temperature probe according to claim 1 , additionally including a measuring transducer that is (electrically) connected to the first connection cable and the second connection cable.

12. The thermometer according to claim 11 , wherein the purpose of the measuring transducer is to record a voltage between the first and the second connection cables.

13. The thermometer according to claim 11 , wherein the measuring transducer is additionally connected to a third and/or fourth connection cables.

14. The thermometer according to claim 13 , wherein the purpose of the measuring transducer is additionally to record a voltage between the third and the fourth connection cables.

15. The thermometer according to claim 13 , wherein the purpose of the measuring transducer is additionally to record a voltage between the second and the third connection cables.

16. The thermometer according to claim 13 , wherein the purpose of the measuring transducer is additionally to record a voltage between the second and the fourth connection cables.

17. The thermometer according to claim 11 , wherein a reference value is stored in the measuring transducer for comparing the voltage present between the first and the second connection cables with the reference value, and, depending upon the comparison, for producing a message that specifies whether or not the voltage between the first and the second connection cables has exceeded the reference value.

18. The thermometer according to claim 17 , wherein the measuring transducer includes a communication interface that, via a field bus to which the thermometer is connectable, is used to transfer the message.

19. The thermometer according to claim 11 wherein the purpose of the message is to detect heat dissipation or a heat dissipation error along the course of the connection cables.

20. The thermometer according to claim 11 , wherein the measuring transducer is used to determine a measured value from the measured signal of the temperature-dependent resistor.

21. The thermometer according to claim 11 , wherein the purpose of the measuring transducer is additionally to correct the measured value as a function of the voltage present between the first and the second connection cables.

22. Method for monitoring a temperature probe according to claim 1 .

23. Method according to claim 22 , wherein a voltage between the first and the second connection cables is recorded.

24. Method according to claim 1 , wherein the voltage recorded between the first and the second connection cables is compared to a reference value.

25. Application of the temperature probe of the thermometer or the method according to claim 1 for determining heat dissipation or a heat dissipation error.

Assignees

• Endress Hauser Wetzer Gmbh Co Kg

Inventors

• Umkehrer Alfred
• Vrdoljak Pavo
• Brundl Harald
• Harle Thomas

Classifications

• G01K15/007

  Testing · CPC title

• G01K7/16

  using resistive elements · CPC title

• G01K7/02

  using thermoelectric elements, e.g. thermocouples · CPC title

• G01K1/20 Primary

  Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature · CPC title