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2022
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Diamond Equipment Temperature Measurement System
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Diamond growth requires a specific temperature range; if the temperature is too high or too low, the diamond phase will transform into graphite or other phases. Diamond seed crystals serve as the “seeds” for diamond growth. When multiple diamond seed crystals are evenly distributed on the substrate holder, microwaves excite a plasma on their surfaces. This plasma maintains the aforementioned narrow temperature range necessary for diamond growth. However, the temperature experienced by each seed crystal varies depending on its position, meaning that the surface temperature of each crystal is not uniform. Therefore, it is essential to measure the temperature at the surface of each diamond seed crystal.
Diamond Equipment Temperature Measurement System
Diamond growth requires a specific temperature range; if the temperature is too high or too low, the diamond phase will transform into graphite or other phases. Diamond seed crystals serve as the “seeds” for diamond growth. When multiple diamond seed crystals are evenly distributed on the substrate holder, microwaves excite a plasma on their surfaces. This plasma maintains the aforementioned narrow temperature range necessary for diamond growth. However, the temperature experienced by each seed crystal varies depending on its position, meaning that the surface temperature of each crystal is not uniform. Therefore, it is essential to measure the temperature at the surface of each diamond seed crystal.
The intelligent automatic temperature‑measurement system acquires infrared images of diamond seed crystals captured by an infrared camera, determines the positions of each seed crystal based on the processed images, and obtains the temperature of the target seed crystal as measured by the camera. The system then reads the relevant process parameters for diamond seed crystal growth, the temperature of the target seed crystal measured by the infrared camera, and the RGB values of the corresponding pixel in the infrared image aligned with the target crystal. Using parameter‑curve equations, it calculates the temperature of the central region of each seed crystal except the target one. Next, the system compares the calculated temperatures of all seed crystals—excluding the target—with user‑defined threshold values; if a crystal’s temperature exceeds the upper limit or falls below the lower limit, an alert is sent to the user’s terminal. Finally, the system stores data collected over a specified period in a database, performs statistical analysis, and generates a graphical summary of the diamond seed crystal information. This invention enables temperature measurement of multiple seed crystals, achieving high‑efficiency monitoring and allowing timely tracking of each crystal’s thermal state, thereby facilitating the growth of high‑quality diamonds.
Diamond equipment
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