TWI797805B - Detection device of cathodic protection apparatus and detection method thereof - Google Patents

Abstract

A detection device used for detecting a cathodic protection apparatus includes a measurement unit and a computing unit. A probe of the measurement unit surrounds the cathodic protection apparatus and outputs a detecting signal. The computing unit is electrically connected to the probe to receive the detecting signal, and the computing unit evaluates the anti-corrosion ability of the cathodic protection apparatus according to the detecting signal.

Description

Detection device and detection method of cathodic anti-corrosion equipment

The invention relates to a cathode anticorrosion equipment, in particular to a detection device and a detection method of the cathode anticorrosion equipment.

Cathodic anti-corrosion equipment is to electrochemically inhibit the corrosion of the structure to be protected to ensure the safety of the structure to be protected. Cathodic anti-corrosion equipment can be mainly divided into sacrificial anode method and active current method. The sacrificial anode method is installed next to the structure to be protected The sacrificial anode with negative potential will corrode due to electrochemical reaction and generate electrons to flow to the protective structure, so as to avoid corrosion of the structure to be protected. The active current method uses the power supply to provide electrons to flow to the structure to be protected, which can also inhibit the corrosion of the structure to be protected. Among them, the sacrificial anode will corrode with the outflow of electrons, thereby affecting its anti-corrosion ability. Therefore, the previous technology will evaluate whether the anti-corrosion ability of the sacrificial anode is still sufficient by observing the corrosion degree of the sacrificial anode. Underwater, such as the underwater foundation of offshore wind turbines, ship hulls, underwater pipelines, etc. Therefore, observing sacrificial anodes must rely on divers diving into the water to visually assess the corrosion status of sacrificial anodes to evaluate their corrosion resistance, resulting in sacrificial anode corrosion It is difficult to ensure the corrosion resistance of sacrificial anodes due to different standards.

The main purpose of the present invention is to use the probe of the measurement unit to measure the detection signal around the cathode corrosion protection equipment, and use the calculation unit to judge the corrosion protection ability of the cathode corrosion protection equipment according to the detection signal.

A detection device for cathodic anti-corrosion equipment of the present invention is used to detect a cathodic anti-corrosion equipment. The detection device for the cathodic anti-corrosion equipment includes a measurement unit and a calculation unit. For the cathodic anti-corrosion equipment, the probe outputs a detection signal, the calculation unit is electrically connected to the probe to receive the detection signal, and the calculation unit evaluates the anti-corrosion capability of the cathodic anti-corrosion equipment according to the detection signal.

In the present invention, the probe of the measurement unit surrounds the cathode corrosion protection equipment to measure the detection signal, since the detection signal can reflect the current magnitude of the cathode corrosion protection equipment, the calculation unit can evaluate according to the detection signal The anti-corrosion ability of the cathodic anti-corrosion equipment.

Please refer to Fig. 1, which is an embodiment of the present invention, a flow chart of a detection method 10 of a detection device for cathodic anti-corrosion equipment, which includes: providing a detection device 11 for cathodic anti-corrosion equipment, setting the detection device for cathodic anti-corrosion equipment The cathodic anti-corrosion equipment is tested 12 underwater and the calculation unit evaluates the anti-corrosion ability of the cathodic anti-corrosion equipment 13 .

Please refer to Figures 1, 2 and 3, a detection device 100 of cathode corrosion protection equipment is provided in step 11, and the detection device 100 of the cathode corrosion protection device includes a measurement unit 110 and a calculation unit 120, and the measurement unit 110 has A probe 111 and a wire 112, the probe 111 is a magnetic induction element, used to sense the magnitude of the magnetic field passing through a surrounding area A of the probe 111 and output a detection signal S _d , the magnitude of the current of the detection signal S _d and The magnitude of the magnetic field passing through the surrounding area A of the probe 111 is proportional to the magnitude of the magnetic field passing through the surrounding area A through the detection signal S _d . The wire 112 is electrically connected to the probe 111 and the computing unit 120 to receive the detection signal S _d of the probe 111 and send it to the computing unit 120 .

Please refer to Figures 1, 4 and 5. In step 12, the detection device 100 of the cathode corrosion protection equipment is installed underwater and detects a cathode corrosion protection equipment 200. The detection is to surround the cathode corrosion protection equipment 200 with the probe 111. The magnetic field generated by the current of the cathodic anti-corrosion equipment 200 is measured, wherein, because the detection signal _Sd output by the probe 111 can reflect the magnitude of the magnetic field generated by the current of the cathodic anti-corrosion equipment 200, and then the cathodic anti-corrosion equipment 200 is obtained The magnitude of the current, and the anti-corrosion ability of the cathodic anti-corrosion equipment 200 can be evaluated by the detection signal S _d . However, the detection device 100 of the cathodic anti-corrosion equipment needs to be installed underwater to detect the cathodic anti-corrosion equipment 200. Therefore, the measurement unit 110 has a waterproof layer, and the waterproof layer covers the probe 111 and the wire 112 to avoid The probe 111 and the wire 112 are exposed to water and corroded. The current value of the detection signal S _d measured by the measurement unit 110 is between 10-1500 mA, and the current value is preferably between 10-1500 mA. 45 mA to improve the accuracy of detection.

Please refer to Fig. 2 again, the resistance value of the wire 112 of the measurement unit 110 affects the accuracy of the detection signal _Sd , because the length of the wire 112 is proportional to its resistance value, the wire 112 used in the detection device 100 The length is limited, so that the calculating unit 120 must also be installed underwater along with the measuring unit 110 . Preferably, the calculation unit 120 is set in a waterproof box 130, and the waterproof box 130 is connected to the wire 112 through a waterproof connector 114, and the calculation unit 120 is electrically connected to the wire 112 through the waterproof connector 114 to receive the detection. The measurement signal S _d , in this embodiment, by setting the waterproof box 130 and the waterproof connector 114, the calculation unit 120 can be prevented from being exposed to water, so that the calculation unit 120 and the measurement unit 110 can enter underwater at the same time. The anti-corrosion device 200 performs measurement to reduce misjudgment caused by the resistance value of the wire 112 . Please refer to Figures 1 and 3, in step 13, the calculation unit 120 evaluates the corrosion protection capability of the cathode corrosion protection device 200 according to the detection signal _Sd , because the detection signal _Sd can reflect the current of the cathode corrosion protection device 200 The calculation unit 120 can determine whether the current of the detection signal S _d is greater than a reference value to evaluate whether the anti-corrosion capability of the cathodic anti-corrosion equipment 200 is still sufficient to prevent the corrosion of the structure 300 to be protected. The reference value must be passed through different water The environment and the material of the structure 300 to be protected are set.

The detection device 100 of the cathodic anti-corrosion equipment in this embodiment is only composed of the measuring unit 110, the computing unit 120, the waterproof box 130 and the waterproof joint 140, which is portable and does not need to be pre-installed on the cathodic anti-corrosion equipment In the system of 200, the detection device 100 can be used to evaluate the anti-corrosion ability of the installed cathodic corrosion protection equipment 200, and has wider application than the fixed detection device.

Please refer to FIG. 4, which is a schematic view of the use of this embodiment. The cathodic corrosion protection device 200 has a sacrificial anode 210, and the sacrificial anode 210 is electrically connected to a structure 300 to be protected. The structure 300 to be protected is the cathodic corrosion protection device. Protected underwater structures, such as, but not limited to, the underwater infrastructure of offshore wind turbines. Wherein, the sacrificial anode 210 has a relatively negative potential relative to the structure to be protected 300, and when the structure to be protected 300 is soaked underwater at the same time, the sacrificial anode 210 will release electrons to the structure to be protected 300 due to corrosion , so as to suppress the corrosion of the structure to be protected 300, and at the same time, the cations and anions in the water will respectively flow to the structure to be protected 300 and the sacrificial anode 210 to form a loop to generate current. Since the shape of the structure 300 to be protected may be difficult to be surrounded by the probe 111, preferably, the probe 111 of the measurement unit 110 surrounds the sacrificial anode 210 to measure the current of the loop and output the detection signal S _d . In other embodiments, if other parts of the loop formed by the cathodic corrosion protection equipment 200 and the structure to be protected 300 can also be surrounded by the probe 111 , the probe 111 can also surround other parts.

Please refer to FIG. 5, which is another schematic view of the use of this embodiment. The cathodic anti-corrosion equipment 200 has an auxiliary anode 220 and a power supply 230. The power supply 230 is electrically connected to the auxiliary anode 220 and the structure to be protected. 300, the power supply 230 is used to output electrons to the structure to be protected 300, so as to suppress the corrosion of the structure to be protected 300, and at the same time, the cations and anions in the water will respectively flow to the structure to be protected 300 and the auxiliary anode 220 to form a loop. Generate current, the probe 111 of the measurement unit 110 is used to surround the auxiliary anode 220, to measure the current of the loop and output the detection signal S _d , similarly, if the cathode corrosion protection equipment 200 and the desired protection If other parts of the loop formed by the structure 300 can also be surrounded by the probe 111, the probe 111 can also surround other parts.

In the present invention, the probe 111 of the measuring unit 110 surrounds the cathodic anti-corrosion equipment 200 to measure the detection signal S _d , since the detection signal S _d can reflect the current of the cathodic anti-corrosion equipment 200, the calculation The unit 120 can evaluate the anti-corrosion capability of the cathodic anti-corrosion device 200 according to the detection signal S _d .

The scope of protection of the present invention should be defined by the scope of the appended patent application. Any changes and modifications made by anyone who is familiar with this technology without departing from the spirit and scope of the present invention belong to the scope of protection of the present invention. .

100: Detection device for cathodic anti-corrosion equipment

110: Measuring unit

111: Probe

112: wire

114: waterproof connector

120: computing unit

130: waterproof box

200: Cathodic corrosion protection equipment

210: sacrificial anode

220: auxiliary anode

230: Power supply

300: To protect the structure

S _d : detection signal

A: around the area

10: Detection method for the detection device of cathodic anti-corrosion equipment

11: Provide detection devices for cathodic corrosion protection equipment

12: Set the detection device of the cathodic anti-corrosion equipment under water and test the cathodic anti-corrosion equipment

13: The calculation unit evaluates the corrosion protection ability of cathodic corrosion protection equipment

Fig. 1: According to an embodiment of the present invention, a flow chart of a detection method of a detection device for cathodic anti-corrosion equipment. Fig. 2: According to an embodiment of the present invention, a schematic diagram of a detection device for cathodic anti-corrosion equipment. Fig. 3: According to an embodiment of the present invention, the block diagram of the detection device of the cathodic anti-corrosion equipment. Figure 4: According to an embodiment of the present invention, a schematic diagram of the use of the detection device of the cathodic anti-corrosion equipment. Fig. 5: According to an embodiment of the present invention, a schematic diagram of the use of the detection device of the cathodic anti-corrosion equipment.

100: Detection device for cathodic anti-corrosion equipment

110: Measuring unit

111: Probe

112: wire

120: computing unit

130: waterproof box

140: waterproof connector

A: around the area

Claims (10)

A detection device for cathodic anti-corrosion equipment, used for testing a cathodic anti-corrosion equipment, comprising: a measuring unit with a probe, a wire and a waterproof joint, the probe is used to surround the cathodic anti-corrosion equipment, and the probe Outputting a detection signal, the wire is electrically connected to the probe to receive the detection signal, the waterproof connector is electrically connected to the wire to receive the detection signal; and a computing unit is electrically connected to the waterproof connector to pass through the The waterproof joint receives the detection signal, and the calculation unit evaluates the corrosion protection capability of the cathodic corrosion protection device according to the detection signal. The detection device of cathodic anti-corrosion equipment according to claim 1, wherein the measuring unit has a waterproof layer, and the waterproof layer covers the probe and the wire. The detection device of cathodic anti-corrosion equipment according to claim 1, wherein the calculation unit is arranged in a waterproof box. The detection device for cathodic anti-corrosion equipment according to claim 3, wherein the waterproof box is connected to the wire through the waterproof connector. The detection device of cathodic anti-corrosion equipment according to claim 1, wherein a current value of the detection signal is between 10~1500mA. The detection device of cathodic anti-corrosion equipment as claimed in claim 1, wherein the cathodic anti-corrosion equipment has a sacrificial anode, the sacrificial anode is used to output an electron to a structure to be protected, and the probe of the measurement unit is used to surround the sacrificial anode. The detection device of cathodic anti-corrosion equipment according to claim 1, wherein the cathodic anti-corrosion equipment has an auxiliary anode, the auxiliary anode is coupled to a structure to be protected, and the probe of the measurement unit is used to surround the auxiliary anode. The detection device of cathodic anti-corrosion equipment as claimed in claim 7, wherein the cathodic anti-corrosion equipment has a power supply, the power supply is electrically connected to the auxiliary anode and a structure to be protected, and the power supply is used to output an electron to the desired protection structure. A detection method for a detection device of cathodic anti-corrosion equipment, which includes: providing a detection device for cathodic anti-corrosion equipment, the detection device of cathode corrosion protection equipment has a measurement unit and a calculation unit, and the measurement unit has a probe and a wire and a waterproof connector, the wire is electrically connected to the probe and the waterproof connector, the calculation unit is electrically connected to the waterproof connector; the detection device of the cathodic corrosion protection equipment is placed underwater, and the probe of the measurement unit is surrounded A cathodic anti-corrosion device located underwater, the probe outputs a detection signal; and the calculation unit receives the detection signal through the waterproof joint and the wire, and the calculation unit evaluates the anti-corrosion performance of the cathodic anti-corrosion device according to the detection signal ability. The detection method of the detection device of the cathodic anti-corrosion equipment according to claim 9, wherein a current value of the detection signal is between 10~1500mA.

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