Electronic scale with double-layer thermal isolation temperature compensation structure

Abstract

The utility model relates to the technical field of intelligent electronic weighing, especially to an electronic scale with double-layer heat isolation and temperature compensation structure, which comprises a scale body shell, a weighing table, a heat conducting layer, a heat insulation layer, a weighing sensor module, a support frame, a mounting bottom plate and a protective cover. The heat conducting layer is arranged below the weighing table, and the heat insulation layer is arranged below the heat conducting layer. The two layers form a heat isolation and heat conducting composite structure. The heat conducting layer is used to evenly distribute the temperature field of the table, and the heat insulation layer is used to block the conduction of the lower heat source. The weighing sensor module is installed on the support frame and connected to the mounting bottom plate through a rubber shock pad to achieve mechanical and thermal isolation. The structure is designed for heat conduction and heat insulation at the physical level, so that the weighing table and the sensor are in a state of thermal equilibrium, effectively reducing the influence of environmental temperature difference on the weighing accuracy, and having the advantages of simple structure, high stability and wide application environment.

Description

Technical Field

[0001] This utility model relates to the field of intelligent electronic weighing technology, and in particular to an electronic scale with a double-layer thermal insulation temperature compensation structure. Background Technology

[0002] Electronic scales, as commonly used measuring devices, are widely used in industrial production, commercial measurement, and household weighing. Existing electronic scales generally employ a strain gauge load cell structure, measuring weight by detecting changes in strain under stress. However, in real-world applications, electronic scales are often used in environments with temperature variations, such as indoor air conditioning temperature changes, outdoor solar radiation, or heat generated by internal circuitry. Temperature variations cause inconsistent thermal expansion of the weighing platform, sensor mounting structure, and sensing elements, resulting in temperature gradients and differences in heat conduction. This leads to problems such as zero-point drift, linearity error, and repeatability error in the weighing results.

[0003] To reduce the thermal impact, existing technologies mostly employ electronic temperature compensation, circuit correction, or software algorithm repair. However, these solutions typically rely on complex electronic components or calibration procedures, resulting in high structural costs. Furthermore, they still struggle to completely eliminate errors caused by stress transmission and temperature hysteresis in scenarios with large temperature differences or rapid temperature changes. The problem of insufficient structural temperature drift compensation is particularly prominent in low-power portable electronic scales, small industrial scales, and metering equipment operating continuously for extended periods. Therefore, designing an electronic scale with a double-layer thermally isolated temperature compensation structure is essential. Utility Model Content

[0004] The purpose of this invention is to provide an electronic scale with a double-layer thermal insulation temperature compensation structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an electronic scale with a double-layer thermal isolation temperature compensation structure, including a scale body shell, a weighing platform, a weighing sensor module, a thermally conductive layer, a heat insulation layer, a support frame, a mounting base plate, and a protective cover. The thermally conductive layer is disposed below the weighing platform, and the heat insulation layer is located below the thermally conductive layer. The thermally conductive layer and the heat insulation layer are arranged parallel to each other in the horizontal direction and are tightly attached to each other, forming a thermal isolation-thermal conductive composite structure. The weighing sensor module is installed on the upper end of the support frame and is fixedly connected to the mounting base plate by screws. The support frame is installed inside the scale body shell. A gap is left between the lower surface of the heat insulation layer and the weighing sensor module to form an air insulation cavity. Through the composite arrangement of the thermally conductive layer and the heat insulation layer, the weighing platform maintains a uniform temperature field when the ambient temperature changes, reducing the influence of temperature conduction on the weighing sensor module.

[0006] According to the above technical solution, the heat-conducting layer is made of copper-aluminum composite plate or graphite heat-conducting sheet, with a thickness of 1-2mm, and is fixedly connected to the weighing platform by screws or heat-conducting adhesive.

[0007] According to the above technical solution, the heat insulation layer is made of closed-cell silicone rubber or polyimide foam material with a thickness of 3-5mm, and is fixedly connected to the support frame by positioning pins.

[0008] According to the above technical solution, the support frame and the mounting base plate are connected by rubber shock-absorbing pads to reduce the stress transmission caused by temperature expansion or external vibration.

[0009] According to the above technical solution, the protective cover covers the outside of the weighing sensor module.

[0010] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, through a double-layer thermal isolation temperature compensation structure consisting of a heat-conducting layer and a heat-insulating layer, uses a heat-conducting layer located below the weighing platform to quickly and evenly transfer heat when the ambient temperature changes, maintaining a consistent temperature field on the platform. The heat-insulating layer is located below the heat-conducting layer to block heat conduction upwards from the lower sensors and circuitry. The combined effect of these two layers ensures that the weighing sensor module remains in a relatively stable temperature environment, effectively reducing measurement errors caused by temperature gradients at the structural level. This invention offers advantages such as simple structure, low manufacturing cost, strong environmental adaptability, and long-term stable accuracy. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of an electronic scale with a double-layer thermal insulation temperature compensation structure proposed in this utility model; Figure 2 This is a partial cross-sectional view of an electronic scale with a double-layer thermal insulation temperature compensation structure proposed in this utility model.

[0012] In the diagram: 1. Scale body shell, 2. Weighing platform, 3. Weighing sensor module, 4. Heat-conducting layer, 5. Heat insulation layer, 6. Support frame, 7. Mounting base plate, 8. Protective cover. Detailed Implementation

[0013] 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.

[0014] Example: Reference Figure 1-2 An electronic scale with a double-layer thermal insulation temperature compensation structure includes a scale body shell 1, a weighing platform 2, a weighing sensor module 3, a heat-conducting layer 4, a heat-insulating layer 5, a support frame 6, a mounting base plate 7, and a protective cover 8.

[0015] The scale housing 1 has an overall rectangular box structure, made of metal plate or composite material, and serves as the outer shell protection and internal installation space for the electronic scale. A platform mounting cavity is provided at the upper end of the scale housing 1 to accommodate the weighing platform 2 and the temperature compensation structure below it. A support frame 6, made of metal profile, is fixedly installed horizontally inside the scale housing 1, serving as the load-bearing foundation for the sensing module and thermal insulation structure.

[0016] The weighing platform 2 is located above the scale body housing 1 and is detachably mounted on the upper surface of the heat-conducting layer 4 using multiple fixing screws. The weighing platform 2 is made of aluminum alloy or stainless steel, and its upper surface is precision ground to form a weighing reference surface. The bottom of the weighing platform 2 is in close contact with the heat-conducting layer 4 to ensure that heat is evenly distributed within the platform area and to prevent local temperature rise from causing sensing errors.

[0017] The heat-conducting layer 4 is located between the weighing platform 2 and the insulation layer 5, and is an overall high thermal conductivity composite board structure. This heat-conducting layer 4 uses copper-aluminum composite material or graphite heat-conducting sheets, with a thickness of 1-2 mm, and is fixedly connected to the weighing platform 2 by screws or thermally conductive adhesive. The main function of the heat-conducting layer 4 is to rapidly and evenly distribute the temperature gradient along the platform when the ambient temperature changes, thereby reducing local differences in thermal expansion and contraction.

[0018] The heat insulation layer 5 is located below the heat-conducting layer 4 and is a flat plate structure made of closed-cell silicone rubber or polyimide foam with a thickness of 3-5 mm. The heat insulation layer 5 is fixedly connected to the support frame 6 via positioning pins, and a certain gap is left between its lower surface and the weighing sensor module 3 to form an air insulation cavity. This heat insulation layer 5 effectively blocks the upward conduction of heat from inside the housing, reducing the degree to which the weighing sensor module 3 is affected by the external environment.

[0019] The load cell module 3 is mounted on the upper end of the support frame 6 and is fixedly connected to the mounting base plate 7 with screws. The module contains a strain gauge sensing element and is covered by a protective cover 8 for dust and moisture protection. The support frame 6 and the mounting base plate 7 are connected by rubber shock-absorbing pads to reduce stress transmission caused by temperature expansion or external vibrations, ensuring stable weighing signals.

[0020] The mounting base plate 7 is horizontally positioned at the bottom of the weighing body housing 1, and is used to mount internal components such as the circuit board, power module, and data interface module. The base plate is made of aluminum alloy to balance rigidity and heat dissipation. The protective cover 8 is installed on the outside of the weighing sensor module 3, and is made of metal or engineering plastic, with a maintenance port provided for inspection.

[0021] In this embodiment, the heat-conducting layer 4 and the heat-insulating layer 5 work together to form a "thermal isolation-thermal conduction composite structure". When the ambient temperature rises, the heat-conducting layer 4 can quickly and evenly transfer heat, keeping the temperature field of the weighing platform 2 consistent; the heat-insulating layer 5 blocks heat conduction from the lower electronic components, thus ensuring that the weighing sensor module 3 is always in a relatively stable temperature environment. In use, the object to be weighed is placed on the weighing platform 2, and the weighing sensor module 3 outputs an electrical signal to the internal processing circuit after detecting the pressure change. Due to the double-layer thermal balance structure formed by the heat-conducting layer 4 and the heat-insulating layer 5, external temperature differences or internal heat sources are unlikely to directly affect the sensor measurement value, thereby achieving structural self-compensation and improving measurement accuracy and long-term stability.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electronic scale with a double-layer thermal insulation temperature compensation structure, comprising a scale body shell (1), a weighing platform (2), a weighing sensor module (3), a thermally conductive layer (4), a heat insulation layer (5), a support frame (6), a mounting base plate (7), and a protective cover (8), characterized in that: The heat-conducting layer (4) is located below the weighing platform (2), and the heat insulation layer (5) is located below the heat-conducting layer (4). The heat-conducting layer (4) and the heat insulation layer (5) are arranged in parallel along the horizontal direction and are closely attached to each other to form a thermal insulation-heat-conducting composite structure. The weighing sensor module (3) is installed on the upper end of the support frame (6) and fixedly connected to the mounting base plate (7) by screws. The support frame (6) is installed inside the scale body housing (1). A gap is left between the lower surface of the heat insulation layer (5) and the weighing sensor module (3) to form an air heat insulation cavity. By combining the heat-conducting layer (4) and the heat-insulating layer (5), the weighing platform (2) maintains a uniform temperature field when the ambient temperature changes, thereby reducing the influence of temperature conduction on the weighing sensor module (3).

2. The electronic scale with a double-layer thermal insulation temperature compensation structure according to claim 1, characterized in that, The heat-conducting layer (4) is made of copper-aluminum composite plate or graphite heat-conducting sheet, with a thickness of 1-2 mm, and is fixedly connected to the weighing platform (2) by screws or heat-conducting adhesive.

3. The electronic scale with a double-layer thermal insulation temperature compensation structure according to claim 1, characterized in that, The heat insulation layer (5) is made of closed-cell silicone rubber or polyimide foam material with a thickness of 3-5 mm, and is fixedly connected to the support frame (6) by positioning pins.

4. The electronic scale with a double-layer thermal insulation temperature compensation structure according to claim 1, characterized in that, The support frame (6) is connected to the mounting base plate (7) by a rubber shock-absorbing pad to reduce the stress transmission caused by temperature expansion or external vibration.

5. The electronic scale with a double-layer thermal insulation temperature compensation structure according to claim 1, characterized in that, The protective cover (8) covers the outside of the weighing sensor module (3).

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