A device for monitoring coral growth rate in seawater and its measurement method

Abstract

The invention discloses a device for monitoring the growth speed of corals in seawater and a measuring method of the device. The device comprises a gravity sensor (1), a connecting device (2), a loadswitching device (3), a quantitative weight (4), a quantitative weight switching device (5), a wireless signal transmitting system (6), a computer (7), a suspension device (8) and a device base (9), and monitors the growth speed of the corals by repeatedly weighing the corals suspending and growing in the seawater. The device includes the steps: 1) correcting the gravity sensor (1); 2) weighing the corals; 3) analyzing data. The weighing device can be switched over a weighing state, an unloaded state and a correcting state and is only in a loaded state in the short weighing process, weighing precision can be effectively kept, errors caused by zero drift and zero temperature drift of the weighing device are avoided by correction in the correcting state, and long-term accurate weighing is guaranteed.

Description

technical field [0001] The invention relates to a device for monitoring the growth rate of coral in seawater and a measuring method thereof, belonging to the technical field of marine biology. Background technique [0002] At this stage, there are mainly three methods to measure the quality of reef-building corals. At first, people often use the direct weighing method, that is, fish out reef-building corals from the water, dry them naturally and then weigh them with a balance. This method will damage the corals. , the continuity experiment cannot be carried out, the measurement error is large, the efficiency of natural air drying is very low, and the operation is inconvenient, so it is not suitable for weighing reefs in large-scale production; after that, the underwater weighing method gradually appeared, that is, the underwater Directly install special weighing devices to weigh corals directly on site, but this method is complicated to operate and has low measurement accura...

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Problems solved by technology

[0002] At this stage, there are mainly three methods to measure the quality of reef-building corals. At first, people often use the direct weighing method, that is, fish out reef-building corals from the water, dry them naturally and then weigh them with a balance. This method will damage the corals. , the continuity experiment cannot be carried out, the measurement error is large, the efficiency of natural air drying is very low, and the operation is inconvenient, so it is not suitable for weighing reefs in large-scale production; after that, the underwater weighing method gradually appeared, that is, the underwater Directly install special weighing devices to weigh corals directly on site, but this method is complicated to operate and has low measurement accuracy; in recent years, buoyancy weighing method has gradually become the main method of coral weighing. The coral is completely submerged in water, and the weighing device is placed underwater to measure the relative weight of the coral. The weighing device used in this method is a high-precision electronic balance, and the electronic balance that can carry out the lower hanging scale is the most commonly used. When weighing, the absolute weight of the coral in the air is converted by measuring parameters such as the density of the water body, the bone density of the measured coral body, and the relative weight. This weighing method will not damage the coral and has high measurement accuracy, but its disadvantage is that , cannot be used for long-term monitoring of the growth process of the same coral

The high-precision balance is under load for a long time, and the gravity sensor itself will creep due to zero-point drift and zero-point temperature drift, which will easily cause the weighing device to lose measurement accuracy

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