An RF interference resistant thermocouple configuration

Abstract

The utility model discloses an anti RF interference thermocouple configuration relates to thermocouple technical field, and the utility model discloses a thermocouple main part, one end of thermocouple main part is fixedly connected with the adapter assembly, and the one end fixedly connected with power module of adapter assembly is away from thermocouple main part, the thermocouple main part includes metal guide rod, the outside of metal guide rod is wrapped with ceramic sleeve, and the one end electrically connected with thermocouple detection element of metal guide rod is away from adapter assembly, the outside of thermocouple detection element is wrapped with ceramic seat, ceramic sleeve and ceramic seat all adopt the alumina material quality and are made, through the outside of metal guide rod and thermocouple detection element respectively setting up the ceramic sleeve and ceramic seat of alumina support, can effectively block the interference of outside heat source to thermocouple, makes the result of thermocouple to temperature measurement more accurate.

Description

Technical Field

[0001] This utility model relates to the field of thermocouple technology, specifically to an RF interference resistant thermocouple configuration. Background Technology

[0002] In modern industrial production and scientific research experiments, thermocouples are widely used temperature sensors. With their advantages of simple structure, rapid response and wide temperature measurement range, they undertake key temperature detection tasks in metallurgy, chemical industry, power, aerospace and other fields. However, with the popularization of industrial automation equipment, high-frequency communication devices and radio frequency heating technology, radio frequency (RF) interference in the working environment has become increasingly complex. Traditional thermocouple configurations have exposed serious performance defects in strong electromagnetic environments, making it difficult to meet the requirements of high-precision temperature detection.

[0003] Currently, when thermocouples with the original configuration encounter RF interference, they exhibit various adverse phenomena, directly leading to a significant deviation of the temperature detection results from the actual value. On one hand, RF interference induces interference voltages on components such as the thermocouple's thermoelectrodes and compensating wires. This interference voltage, combined with the weak thermoelectric potential generated by the thermocouple (typically only a few millivolts to tens of millivolts), distorts the signal received by the measuring instrument.

[0004] On the other hand, RF interference can easily cause unstable fluctuations in thermocouple signals, manifesting as measurement data jumps and baseline drift. This is due to the electromagnetic coupling effect between the thermocouple material and the interference source, as well as the conduction and radiation of RF signals by the compensating wires. In automated production lines, such signal anomalies can lead to misjudgments by the control system, causing equipment malfunctions or product quality defects. Furthermore, traditional thermocouples lack effective shielding and filtering measures, and their junction boxes, solder joints, and other critical components are susceptible to spatial radiation interference, further exacerbating signal distortion. To address these issues, the inventors have proposed an RF interference-resistant thermocouple configuration to solve these problems. Utility Model Content

[0005] In order to solve the problem of inaccurate temperature detection caused by the adverse phenomena of the original thermocouple configuration when encountering RF interference, the purpose of this utility model is to provide an RF interference resistant thermocouple configuration.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: an anti-RF interference thermocouple configuration, including a thermocouple body segment, a converter component fixedly connected to one end of the thermocouple body segment, and a power supply component fixedly connected to the end of the converter component away from the thermocouple body segment;

[0007] The thermocouple body includes a metal guide rod, the outer side of which is wrapped with a ceramic sleeve. The end of the metal guide rod away from the adapter is electrically connected to a thermocouple detection element. The outer side of the thermocouple detection element is wrapped with a ceramic seat. Both the ceramic sleeve and the ceramic seat are made of alumina.

[0008] Preferably, the adapter assembly includes an adapter compartment, which is fixedly connected to the end of the thermocouple body section away from the thermocouple detection element.

[0009] Preferably, the power supply assembly includes a power cord, which is fixedly connected to the end of the adapter compartment away from the thermocouple body section, and a plug is fixedly connected to the end of the power cord away from the adapter compartment.

[0010] Preferably, both the metal guide rod and the ceramic base are wrapped with transparent heat shrink tubing, which is made of polyethylene.

[0011] Preferably, the end of the thermocouple detection element away from the thermocouple body is sealed with an insulating and thermally conductive adhesive, which is made of a polymer composite material.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By sleeved with an alumina-supported ceramic sleeve and ceramic seat on the outside of the metal guide rod and the thermocouple sensing element respectively, the interference of external heat sources on the thermocouple can be effectively blocked, making the thermocouple temperature measurement results more accurate.

[0014] 2. By setting an insulating and thermally conductive adhesive, an integrated shielding-thermal conductive structure is formed, which can reflect or absorb RF interference signals, especially high-frequency bands, and prevent them from coupling to the sensitive element of the thermocouple through the air. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a thermocouple configuration that resists RF interference.

[0017] Figure 2 This is a front sectional view of a thermocouple configuration resistant to RF interference.

[0018] Figure 3 A thermocouple configuration resistant to RF interference Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 This is a side sectional view of a thermocouple configuration resistant to RF interference.

[0020] In the diagram: 1. Thermocouple body section; 11. Metal guide rod; 12. Thermocouple detection element; 13. Ceramic sleeve; 14. Ceramic base; 2. Adapter assembly; 21. Adapter compartment; 3. Power supply assembly; 31. Power cord; 32. Plug; 4. Transparent heat shrink tubing; 5. Insulating thermally conductive adhesive. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Figure 1-4 As shown, this utility model provides an anti-RF interference thermocouple configuration, including a thermocouple body segment 1, a converter component 2 fixedly connected to one end of the thermocouple body segment 1, and a power supply component 3 fixedly connected to the end of the converter component 2 away from the thermocouple body segment 1.

[0023] The thermocouple body section 1 includes a metal guide rod 11, the outer side of which is wrapped with a ceramic sleeve 13. The end of the metal guide rod 11 away from the adapter assembly 2 is electrically connected to a thermocouple detection element 12. The outer side of the thermocouple detection element 12 is wrapped with a ceramic seat 14. Both the ceramic sleeve 13 and the ceramic seat 14 are made of alumina.

[0024] The adapter assembly 2 includes an adapter compartment 21, which is fixedly connected to the end of the thermocouple body section 1 away from the thermocouple detection element 12.

[0025] By adopting the above technical solution, the thermocouple body section 1 and the power supply component 3 are electrically connected by setting the adapter compartment 21, providing a stable connection point. This ensures that the weak thermoelectric signal generated by the thermocouple can be reliably transmitted to the measuring instrument or control system for processing and display, guaranteeing the accuracy and stability of signal transmission and reducing signal distortion and interference.

[0026] The power supply assembly 3 includes a power cord 31, which is fixedly connected to the end of the adapter compartment 21 away from the thermocouple body section 1, and a plug 32 is fixedly connected to the end of the power cord 31 away from the adapter compartment 21.

[0027] By adopting the above technical solution and by setting up the power cord 31 and plug 32, power can be supplied to the thermocouple system.

[0028] Both the metal guide rod 11 and the ceramic base 14 are wrapped with transparent heat shrink tubing 4, which is made of polyethylene.

[0029] By adopting the above technical solution and setting the transparent heat shrink tubing 4, the various components of the thermocouple are tightly connected with the ceramic sleeve 13 and the ceramic base 14, completely enclosing the functional components of the thermocouple.

[0030] The end of the thermocouple detection element 12 away from the thermocouple body section 1 is sealed with an insulating and thermally conductive adhesive 5, which is made of a polymer composite material.

[0031] By adopting the above technical solution and setting the insulating and thermally conductive adhesive 5, an integrated shielding and thermally conductive structure is formed, which can reflect or absorb RF interference signals, especially in the high-frequency band, such as 100MHz~10GHz, and prevent them from coupling to the sensitive element of the thermocouple through the air.

[0032] Working principle: When using this thermocouple configuration to detect temperature, by sleeved on the outside of the metal guide rod 11 and the thermocouple detection element 12 with alumina-supported ceramic sleeve 13 and ceramic seat 14 respectively, the interference of external heat sources on the thermocouple can be effectively blocked, making the thermocouple temperature measurement results more accurate.

[0033] Furthermore, a ceramic base 14 is wrapped around the outside of the thermocouple sensing element 12 and the ceramic sheath 13, so that each thermocouple element is tightly connected to the ceramic sheath 13 and the ceramic base 14.

[0034] Meanwhile, by setting the insulating and thermally conductive adhesive 5, an integrated shielding-thermal conductive structure is formed, which can reflect or absorb RF interference signals, especially in the high-frequency band, such as 100MHz~10GHz, and prevent them from coupling to the sensitive element of the thermocouple through the air.

[0035] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A thermocouple configuration resistant to RF interference, comprising a thermocouple body segment (1), characterized in that: One end of the thermocouple body segment (1) is fixedly connected to a transition component (2), and the end of the transition component (2) away from the thermocouple body segment (1) is fixedly connected to a power supply component (3). The thermocouple body section (1) includes a metal guide rod (11), the outer side of which is wrapped with a ceramic sleeve (13). The end of the metal guide rod (11) away from the adapter assembly (2) is electrically connected to a thermocouple detection element (12). The outer side of the thermocouple detection element (12) is wrapped with a ceramic seat (14). Both the ceramic sleeve (13) and the ceramic seat (14) are made of alumina.

2. The RF interference resistant thermocouple configuration as described in claim 1, characterized in that, The adapter assembly (2) includes an adapter compartment (21), which is fixedly connected to the end of the thermocouple body section (1) away from the thermocouple detection element (12).

3. The RF interference resistant thermocouple configuration as described in claim 1, characterized in that, The power supply assembly (3) includes a power cord (31), which is fixedly connected to one end of the adapter compartment (21) away from the thermocouple body section (1), and a plug (32) is fixedly connected to the other end of the power cord (31) away from the adapter compartment (21).

4. The RF interference resistant thermocouple configuration as described in claim 1, characterized in that, The metal guide rod (11) and the ceramic seat (14) are both wrapped with transparent heat shrink tubing (4), which is made of polyethylene.

5. The RF interference resistant thermocouple configuration as described in claim 1, characterized in that, The end of the thermocouple detection element (12) away from the thermocouple body section (1) is sealed with an insulating thermally conductive adhesive (5), which is made of a polymer composite material.

Images