Off-line indicating device for temperature measurement
By designing an offline indicating device consisting of a metal substrate, a liner, and a transparent cover, and utilizing the melting of powdered thermosensitive material to indicate temperature, the problems of slow high-temperature response, short battery life, and poor applicability to complex environments in existing technologies have been solved, enabling rapid, long-term temperature measurement over a wide high-temperature range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-04-07
AI Technical Summary
Existing offline temperature measurement devices have long response times in high-temperature ranges, limited battery life, cannot perform long-term measurements, are not suitable for complex environments, and cannot directly display measurement results.
Design an offline indicating device comprising a metal substrate, a metal liner, and a transparent cover. Use powdered thermosensitive material as the temperature indicating material. The temperature is indicated by melting from a solid state to a molten state. The metal part is made of a high melting point material, and the transparent cover is made of quartz glass. The fixing method is glue or mechanical connection.
It achieves rapid response (second-level) within the 300~800℃ range, has unlimited battery life, is suitable for complex environments, and can measure for a long time without secondary measurement, allowing direct visual observation of temperature changes.
Smart Images
Figure CN121804689A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of temperature measurement, in particular to an offline indicating device for temperature measurement. BACKGROUND
[0002] The temperature measurement field is mainly divided into two categories: online and offline temperature measurement. Online temperature measurement generally requires connection of power supply and signal line. Offline temperature measurement mainly includes battery-powered measuring devices, temperature measuring patches, temperature measuring rings, and temperature measuring pens. The battery-powered measuring devices use thermocouples for measurement, and the measurable temperature is the measurement capability of the thermocouples. However, due to the presence of electronic devices and batteries, the general use temperature is -40℃ to 300℃, the response time can reach milliseconds, and the endurance is limited by the battery. The temperature measuring patch is based on a thermosensitive material. When the temperature reaches or exceeds a preset critical value, the thermosensitive material in the patch will undergo a permanent color change. The current market temperature measuring patch can measure a temperature range of 29℃ to 290℃, and the response time is seconds. The temperature measuring ring is a high-temperature sintered ceramic material. The actual cumulative heat is reflected by the linear shrinkage of the material after heating, and then converted into a temperature value. The current market temperature measuring ring can measure a temperature of 500 to 1900℃. The temperature measuring ring is a cumulative measurement, and it generally takes tens of minutes or even hours to achieve accurate measurement. The temperature measuring pen is based on a thermosensitive material. When the temperature reaches or exceeds a preset critical value, the pen core material of the temperature measuring pen will change from solid to liquid (melt), forming a molten state substance. The current market temperature measuring pen can measure a temperature range of 38 to 1093℃, and the response time is seconds. The temperature measuring pen is used to mark lines on the surface of a workpiece.
[0003] Online temperature measurement generally requires connection of power supply and signal line. In some measurement conditions, it is not possible to connect the power supply and signal line, such as measuring the internal temperature of a container. The battery-powered measuring devices use thermocouples for measurement, and the measurable temperature is the measurement capability of the thermocouples. However, due to the presence of electronic devices and batteries, the general use temperature is -40℃ to 300℃, the response time can reach milliseconds, and the endurance is limited by the battery. For higher temperatures such as 300 to 800℃, it is not suitable, and the endurance limit value cannot be used for long-term measurement. The temperature measuring patch can measure a temperature range of 29℃ to 290℃, and the response time is seconds. For higher temperatures such as 300 to 800℃, it is not suitable. The temperature measuring ring can measure a temperature of 500 to 1900℃. However, the temperature measuring ring is a cumulative measurement, and it generally takes tens of minutes or even hours to achieve accurate measurement. It cannot measure high temperatures for a short time, and the temperature measuring ring cannot directly display the measurement results. It needs to be calculated or looked up through secondary measurement, which weakens its information transmission ability.
[0004] The temperature measuring pen can measure the temperature in the range of 38-1093 DEG C, and the response time is in seconds, but the temperature measuring pen needs to draw a line on the surface of the workpiece to mark when in use, at this time, if the surface of the workpiece is a smooth surface, the temperature measuring pen cannot mark, and the marker will fall off under the conditions of vibration, impact and the like, and is not suitable for temperature measurement in a complex environment. SUMMARY
[0005] To achieve the above object and other related objects, the application discloses an offline indicating device for temperature measurement, comprising: a metal base sheet, at least one mounting hole being arranged on the metal base sheet; a metal liner sheet, arranged on the metal base sheet, at least one opening being arranged on the metal liner sheet; a temperature indicating material, in the form of a powder, being arranged in the opening, the temperature indicating material being configured to melt from a solid state to a molten state when reaching a preset temperature; a transparent cover sheet, made of a transparent high-temperature-resistant material, arranged on the metal liner sheet and covering the opening, allowing visual observation of the state change of the temperature indicating material; wherein the metal base sheet, the metal liner sheet and the transparent cover sheet are fixedly connected into a whole by a fixing mode.
[0006] Preferably, the metal base sheet and the metal liner sheet are made of a high-melting-point metal or a high-melting-point alloy.
[0007] Preferably, the transparent cover sheet is made of quartz glass.
[0008] Preferably, the fixing mode comprises glue bonding or mechanical connection.
[0009] Preferably, the mechanical connection is rivet connection.
[0010] Preferably, a plurality of openings are arranged on the metal liner sheet, and different temperature indicating materials are arranged in each opening, corresponding to different preset temperatures respectively.
[0011] Preferably, an indicating character is arranged beside each opening in the plurality of openings, for indicating the corresponding preset temperature.
[0012] Preferably, the indicating character is formed by laser etching.
[0013] By adopting the above technical solution, the highest temperature in the range of 300-800 DEG C can be measured under offline condition, the response time is fast, reaching seconds, no battery is needed, the endurance is unlimited, it can be used for long-time measurement, no secondary measurement is needed, only temperature reading is needed, installation and arrangement are convenient and firm, the marker will not fall off under the conditions of vibration, impact and the like, and is suitable for temperature measurement in a complex environment. BRIEF DESCRIPTION OF DRAWINGS
[0014] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of this disclosure. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 This is a disassembled diagram of one embodiment of the present invention; Figure 2 This is a disassembly diagram of another embodiment of the present invention.
[0015] Reference numerals: 1. Indicating device; 2. Mounting hole; 3. Metal base plate; 4. Opening; 5. Indicating character; 6. Metal liner; 7. Transparent cover plate. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] Reference Figure 1 This invention provides an offline indicating device for temperature measurement, comprising: A metal base plate 3 is provided with at least one mounting hole 2, which is used to install the indicator device 1 to a designated position; A metal liner 6 is disposed on the metal base plate 3, and at least one opening 4 is provided on the metal liner 6; The temperature indicating material is a powdered thermosensitive material, which is disposed in the opening 4. The temperature indicating material is configured to melt from a solid state to a molten state when a preset temperature is reached. A transparent cover 7, made of a transparent high-temperature resistant material, is disposed on the metal backing 6 and covers the opening 4, allowing visual observation of the state changes of the temperature indicator material; The metal base plate 3, the metal liner 6, and the transparent cover plate 7 are fixedly connected into a whole by a fixing method.
[0018] Preferably, the metal substrate 3 and the metal liner 6 are made of high-melting-point metal or high-melting-point alloy with a melting point greater than 100°C.
[0019] Preferably, the transparent cover 7 is made of quartz glass.
[0020] Preferably, the fixing method includes adhesive bonding or mechanical connection.
[0021] Preferably, the mechanical connection is a riveted connection.
[0022] Preferably, the metal liner 6 has multiple openings 4, and each opening 4 contains a different temperature indicating material, which corresponds to a different preset temperature.
[0023] Preferably, each of the plurality of openings 4 is provided with an indicator character 5 next to it to indicate the corresponding preset temperature.
[0024] Preferably, the indicator character 5 is formed by laser etching.
[0025] In a preferred embodiment of the present invention, referring to Figure 1 The indicator device 1 is 35mm long and 75mm wide. The metal base 3 is made of 304 stainless steel, 35mm long, 75mm wide, and 0.5mm thick, with four mounting holes 2 located at the top and bottom of the metal base. These mounting holes 2 are through holes with a diameter of 3mm. The metal backing plate 6 is also made of 304 stainless steel, 35mm long, 65mm wide, and 2mm thick, with five rectangular openings 4, each 15mm long and 5mm wide, symmetrically arranged at 5mm intervals. Five indicator characters 5 are laser-etched onto the five openings 4. Temperature indicating material, in powder form, is dispersed within the openings 4. This temperature indicating material is thermistoric, with a particle size of approximately 0.1mm. The transparent cover 7 is a quartz glass sheet, 35mm long, 65mm wide, and 0.5mm thick. A metal base plate 3, a metal backing plate 6, and a transparent cover plate 7 are bonded together using high-temperature ceramic adhesive to form a sheet-mounted indicator device 1. The indicator device 1 starts at 300°C and ends at 800°C, with a temperature indication point every 10°C, and a total of 51 sheets make up one set.
[0026] In another preferred embodiment of the invention, refer to Figure 2The indicating device 1 is 40mm long and 85mm wide. The metal base plate 3 is made of 304 stainless steel, 40mm long, 85mm wide, and 0.5mm thick. It has four mounting holes 2 located at the top and bottom of the metal base plate; these holes are through holes with a diameter of 3mm. The metal base plate 3 has 22 riveting holes, also through holes with a diameter of 3mm, arranged in an array. The metal backing plate 6 is also made of 304 stainless steel, 40mm long, 75mm wide, and 2mm thick. It has five rectangular openings 4, each 15mm long and 5mm wide, arranged symmetrically at 5mm intervals. Five indicator characters 5 are laser-etched on the five openings 4. Temperature indicating material, in powder form, is dispersed within the openings 4. This temperature indicating material is thermistoric, with a particle size of approximately 0.1mm. The metal backing plate 6 has 22 through holes, each 3mm in diameter, arranged in an array. The transparent cover plate 7 is a quartz glass sheet, 40mm long, 75mm wide, and 0.5mm thick. It also has 22 through holes, each 3mm in diameter, arranged in an array. The metal backing plate 3, metal backing plate 6, and transparent cover plate 7 are connected using 3mm copper rivets to form a sheet-mounted indicating device 1. The indicating device 1 starts at 300℃ and ends at 800℃, with a temperature indication point every 10℃, totaling 51 pieces forming one set.
[0027] Preferably, in this embodiment of the invention, the metal substrate 3 and the metal liner 6 can be combined into a single metal substrate. A groove is opened on the metal substrate to replace the double-layer and perforated structure 4, which can further simplify the product structure and reduce the possibility of powder leakage.
[0028] The riveting structure can be replaced by setting grooves on the top, bottom, left and right, with the metal base plate rolled into the grooves by three edges, which can reduce the number of riveting holes.
[0029] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined.
[0030] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.
[0031] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. An offline indicating device for temperature measurement, characterized in that, include: A metal base plate (3) having at least one mounting hole (2) thereon; A metal liner (6) is disposed on the metal base plate (3), and at least one opening (4) is provided on the metal liner (6); The temperature indicating material is a powdered thermosensitive material, which is disposed in the opening (4). The temperature indicating material is configured to melt from a solid state to a molten state when a preset temperature is reached. A transparent cover (7), made of a transparent high-temperature resistant material, is placed on the metal backing (6) and covers the opening (4), allowing visual observation of the state changes of the temperature indicator material; The metal base plate (3), the metal liner (6), and the transparent cover plate (7) are fixedly connected into a whole by a fixing method.
2. The offline indicating device for temperature measurement according to claim 1, characterized in that, The metal substrate (3) and metal liner (6) are made of high-melting-point metal or high-melting-point alloy.
3. The offline indicating device for temperature measurement according to claim 1, characterized in that, The transparent cover (7) is made of quartz glass.
4. The offline indicating device for temperature measurement according to claim 1, characterized in that, The fixing method includes adhesive bonding or mechanical connection.
5. An offline indicating device for temperature measurement according to claim 4, characterized in that, The mechanical connection is a riveted connection.
6. An offline indicating device for temperature measurement according to claim 1, characterized in that, The metal liner (6) has multiple openings (4), and each opening (4) contains a different temperature indicating material, which corresponds to a different preset temperature.
7. An offline indicating device for temperature measurement according to claim 6, characterized in that, Each of the plurality of openings (4) is provided with an indicator character (5) next to it to indicate the corresponding preset temperature.
8. An offline indicating device for temperature measurement according to claim 7, characterized in that, The indicator character (5) is formed by laser etching.