Aluminum electrolysis cell optical fiber current measuring instrument and compensation method

Abstract

According to the aluminum electrolysis cell optical fiber current measuring instrument and the compensation method, a measuring optical fiber is arranged in a fork body part, the fork body part is provided with an opening, and the width of the fork body part is matched with the width of an anode guide rod / cathode steel bar of an aluminum electrolysis cell; and the anode guide rod / cathode steel bar can be directly arranged in the fork body part without moving a mechanical structure. And the measuring optical fiber extends to the outside along the measuring rod and is connected with the current collector, so that the current collector can detect the current passing through the anode guide rod / cathode steel bar according to the Faraday magneto-optical effect. According to the invention, the current measurement result of the detected anode rod / cathode steel bar in the fork body part is compensated to obtain the current detection value, so that the current value of each anode rod / cathode steel bar in the aluminum electrolysis cell is accurately measured and detected. According to the technical scheme, the method can be reliably applied to current distribution measurement of the aluminum electrolysis cell, and the measurement efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber sensor devices, and in particular to an optical fiber current measuring instrument and a compensation method for an aluminum electrolysis cell. Background Art

[0002] The amount of current is the core process parameter in aluminum electrolysis production. Each aluminum electrolytic cell contains about 50 anode guide rods and about 100 cathode steel bars. The current distribution on the anode guide rods and cathode steel bars is of great significance for aluminum electrolysis process control, fault diagnosis, and digital intelligence. However, the measurement of anode and cathode currents in aluminum electrolytic cells faces harsh environments such as high temperature and strong magnetic fields, and there has been a lack of equipment that can accurately measure anode and cathode currents. At present, the measurement of anode current mainly adopts the equidistant voltage drop method, which is based on the voltage drop generated when the current passes through the horizontal busbar or the anode guide rod. Due to the large geometric dimensions of the horizontal busbar and the anode guide rod, the current distribution on the cross section is uncertain and non-uniform, as well as the conductor temperature difference, etc., it can only measure the trend of change and it is difficult to give an accurate current value.

[0003] The fiber optic current sensor is based on the Faraday magneto-optical effect and Ampere's loop theorem. It can realize the current measurement of AC, DC and various complex waveforms. It has a large dynamic range, high measurement accuracy, and strong anti-magnetic interference ability. It is more suitable for aluminum electrolysis current measurement. In order to improve the efficiency of fiber optic current sensors in the measurement of anode and cathode current distribution of aluminum electrolysis, the prior art discloses a fiber optic current detection device, which adopts a clamp structure, and the optical fiber used for current detection is installed on the first semi-circular body and the second semi-circular body, and the first semi-circular body and the second semi-circular body can be switched between the open position and the working position under the action of the operating mechanism. When in use, the detection device is first switched to the open position and put on the conductor to be measured, and then switched to the working position, so that the sensing optical fiber is closed and the rapid measurement of the current is completed. However, due to the high temperature, dust and other problems faced by the aluminum electrolysis site, the clamp structure is prone to failure. Summary of the invention

[0004] The technical problem to be solved by the present application is that the optical fiber current detection device in the prior art adopts a clamp-shaped structure, which is easily affected by high temperature and dust and thus easily fails.

[0005] In a first aspect, the technical solution of the present application provides an aluminum electrolysis cell optical fiber current measuring instrument, comprising:

[0006] A fork body component having an opening, the width of which is adapted to the width of an anode guide rod / cathode steel rod of an aluminum electrolytic cell;

[0007] A measuring rod, a first end of which is detachably connected to the bottom of the fork body component;

[0008] A current collector is arranged at the second end of the measuring rod;

[0009] The measuring optical fiber is arranged inside the fork body component, and includes a polarization-maintaining optical fiber, a quarter wave plate, a circularity-maintaining optical fiber and an optical fiber reflector. The quarter wave plate and the optical fiber reflector are respectively located at the top of both ends of the fork body opening; the polarization-maintaining optical fiber extends along the measuring rod and is connected to the collection connector of the current collector;

[0010] The current collector compensates the current measurement result of the anode guide rod / cathode steel rod under test inside the fork body component to obtain a current detection value.

[0011] In some embodiments of the aluminum electrolysis cell optical fiber current measuring instrument, the fork body component includes a bottom end face and a group of side faces, and the group of side faces are respectively vertically arranged on both sides of the bottom end face.

[0012] In some embodiments of the aluminum electrolysis cell optical fiber current measuring instrument, the height of the side surface of the fork body component is greater than or equal to twice the width of the bottom end surface.

[0013] In some embodiments of the aluminum electrolysis cell optical fiber current measuring instrument, an auxiliary support portion is provided at the position where the first end of the measuring rod is connected to the bottom of the fork body component.

[0014] In some embodiments of the aluminum electrolysis cell optical fiber current measuring instrument, the second end of the measuring rod is provided with a handle, and the current collector is arranged at the front end of the handle.

[0015] In a second aspect, the technical solution of the present application provides a compensation method for the optical fiber current measuring instrument for an aluminum electrolysis cell as described in any one of the first aspects, comprising the following steps:

[0016] The optical fiber current measuring instrument for aluminum electrolysis cell is used to measure the current value I of the anode guide rod / cathode steel rod under test of the aluminum electrolysis cell. A1 ~I An and I B1 ~I Bn , where A1~An, B1~Bn represent the serial numbers of the anode guide rod / cathode steel bar on the A side and the anode guide rod / cathode steel bar on the B side of the aluminum electrolytic cell respectively, and the A side and the B side are opposite sides; the sum of the anode / cathode currents on both sides of the aluminum electrolytic cell A and B is obtained: I=I A +I B ;

[0017] Obtain the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side; and calculate the current value I of the anode guide rod / cathode steel rod to be measured according to the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side. A1 ~IAn and I B1 ~I Bn Compensation is performed to obtain the final current detection value.

[0018] The compensation method of the optical fiber current measuring instrument for aluminum electrolysis cell described in some schemes comprises obtaining the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side; and calculating the current value I of the anode guide rod / cathode steel rod to be measured according to the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side. A1 ~I An and I B1 ~I Bn Compensation, including:

[0019] Get the total anode / cathode current of the A side of the aluminum electrolysis cell: I A =I A1 +I A2 +...I An ; Obtain the total anode / cathode current of the B side of the aluminum electrolysis cell: I B =I B1 +I B2 +...I Bn ;

[0020] Get the total current I of all anode guide rods / cathode steel bars of the aluminum electrolysis cell s ;

[0021] Get the current compensation coefficient K = I / I s As the anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side;

[0022] According to the compensation coefficient, the current value I of the anode guide rod / cathode steel rod to be measured A1 ~I An and I B1 ~I Bn Compensation is performed to obtain the final current detection value: I Ai’ =I Ai / K;I Bi’ =I Bi / K, i=1,2,……n.

[0023] The compensation method of the optical fiber current measuring instrument for aluminum electrolysis cell described in some schemes comprises obtaining the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side; and calculating the current value I of the anode guide rod / cathode steel rod to be measured according to the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side. A1 ~I An and I B1 ~I Bn Compensation, including:

[0024] Through the calibration test, the auxiliary optical fiber measuring instrument is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolytic cell. a1’ ~I an’ and I b1’ ~I bn’ ; The optical fiber current measuring instrument for aluminum electrolysis cell is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolysis cell. A1 ~I An and I B1 ~I Bn ;

[0025] Building a compensation model:

[0026]

[0027]

[0028] Among them, K Aa , K Ab , K Ac K is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the A side being affected by the currents of the i-1th, i-th, and i+1th anode guide rods / cathode steel rods respectively; Ba , K Bb , K Bc is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the B side being affected by the currents of the i-1th, i, and i+1th anode guide rods / cathode steel rods respectively;

[0029] According to the compensation model, K is obtained Aa , K Ab , K Ac and K Ba , K Bb , K Bc ;

[0030] The current value I of the anode guide rod / cathode steel rod to be measured A1 ~I An and I B1 ~I Bn With K Aa , K Ab , K Ac and K Ba , K Bb , K Bc Substitute them into the compensation model respectively to obtain the final current detection value.

[0031] In a third aspect, the technical solution of the present application provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the compensation method for the aluminum electrolysis cell optical fiber current measuring instrument described in any one of the second aspects.

[0032] In a fourth aspect, the technical solution of the present application provides an electronic device, comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the compensation method of the aluminum electrolysis cell optical fiber current measuring instrument described in any one of the second aspects.

[0033] Compared with the prior art, the above technical solution provided by this application has at least the following technical effects:

[0034] The optical fiber current measuring instrument and compensation method for aluminum electrolysis cells provided by the present application sets the measuring optical fiber in a fork body component, the fork body component has an opening, and the width of the fork body component is adapted to the width of the anode guide rod / cathode steel rod of the aluminum electrolysis cell. Therefore, the anode guide rod / cathode steel rod can be directly placed inside the fork body component without a movable mechanical structure, thereby realizing that the measuring optical fiber surrounds the anode guide rod / cathode steel rod. The measuring optical fiber can extend along the measuring rod to the outside to connect with the current collector, so that the current collector can detect the current passing through the anode guide rod / cathode steel rod based on the Faraday magneto-optical effect. Because the optical fiber reflector and the 1 / 4 wave plate optical path are not closed, the present application compensates for the current measurement result of the measured anode guide rod / cathode steel rod inside the fork body component to obtain the current detection value, thereby realizing accurate measurement of the current value in each anode guide rod / cathode steel rod in the aluminum electrolysis cell. The technical solution of the present application can be reliably applied in the current distribution measurement of aluminum electrolysis cells, and the measurement efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of an optical fiber current measuring instrument for an aluminum electrolysis cell according to an embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of a structure in which a measuring optical fiber is arranged in a fork body component according to an embodiment of the present application;

[0037] Figure 3 This is a flow chart of a compensation method according to an embodiment of the present application;

[0038] Figure 4 This is a structural schematic diagram of the arrangement of anode guide rods on both sides A and B in an aluminum electrolytic cell according to an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the hardware connection relationship of an electronic device that executes the compensation method described in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0041] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0042] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0043] The present application embodiment provides an aluminum electrolysis cell optical fiber current measuring instrument, such as Figure 1 and Figure 2 As shown, the optical fiber current measuring instrument for aluminum electrolytic cell includes a fork body component 100, a measuring rod 200 and a current collector 300. The fork body component 100 has an opening, and the width of the opening of the fork body component 100 is adapted to the width of the anode guide rod / cathode steel rod of the aluminum electrolytic cell; the first end of the measuring rod 200 is detachably connected to the bottom of the fork body component 100, so that the fork body component 100 can be easily removed from the measuring rod 200, and then according to the actual width of the anode guide rod and the cathode steel rod, a suitable fork body component 100 is selected and installed on the measuring rod 200 for current measurement; the current collector 300 is arranged at the second end of the measuring rod 200; the measuring optical fiber is arranged inside the fork body component 100, and the measuring fiber optic cable 300 is connected to the measuring rod 200. Figure 2 The measuring optical fiber includes a polarization-maintaining optical fiber 101, a quarter wave plate 102, a roundness-maintaining optical fiber 103 and an optical fiber reflector 104. The quarter wave plate 102 and the optical fiber reflector 104 are respectively located at the top of both ends of the opening of the fork body component 100; the polarization-maintaining optical fiber 101 extends along the measuring rod 200 and is connected to the collection connector of the current collector 300; the current collector 300 compensates the current measurement result of the anode guide rod / cathode steel rod under test inside the fork body component 100 to obtain a current detection value.

[0044] In theory, the measuring optical fiber should form an enclosing structure that covers the outside of the anode guide rod / cathode steel rod to be measured, thereby being able to detect the current passing through the anode guide rod / cathode steel rod to be measured based on the Faraday magneto-optical effect. The fork body component 100 used in the present application has an opening suitable for the anode guide rod / cathode steel rod to be measured to pass through, so the measuring optical fiber does not form an enclosing structure, and there is a deviation in the detection result. Therefore, the current collector 300 compensates and corrects the current value detected based on the Faraday magneto-optical effect, so as to obtain the accurate current value passing through the anode guide rod / cathode steel rod to be measured.

[0045] In the above embodiment of the present application, the measuring optical fiber is arranged in the fork body part 100, and the fork body part 100 has an opening. The width of the fork body part 100 is adapted to the width of the anode guide rod / cathode steel bar of the aluminum electrolytic cell. Therefore, the anode guide rod / cathode steel bar can be directly placed inside the fork body part 100 without a movable mechanical structure, thereby realizing that the measuring optical fiber surrounds the anode guide rod / cathode steel bar. The measuring optical fiber can extend to the outside along the measuring rod 200 and connect to the current collector 300, thereby the current collector 300 can detect the current passing through the anode guide rod / cathode steel bar according to the Faraday magneto-optical effect. Because the optical path of the optical fiber reflector 104 and the 1 / 4 wave plate 102 is not closed, the current measurement result of the measured anode guide rod / cathode steel bar inside the fork body part 100 is compensated to obtain the current detection value, thereby realizing accurate measurement of the current value in each anode guide rod / cathode steel bar in the aluminum electrolytic cell. The technical solution of the present application can be reliably applied in the current distribution measurement of the aluminum electrolytic cell, and the measurement efficiency is high.

[0046] The cross section of the fork body component 100 in the above solution may include various shapes, such as U-shaped, polygonal, etc. Preferably, as Figure 2 As shown, the fork body component 100 in the present application includes a bottom end face and a set of side faces, and the set of side faces are respectively arranged vertically on both sides of the bottom end face. That is, the fork body component 100 is equivalent to having a square groove, which is convenient for the anode guide rod / cathode steel rod to enter the interior of the fork body component 100, and is located at the bottom of the square groove. When the anode current or cathode current is measured by using the embodiment of the present application, the magnetic field can be kept away from the fiber reflector 104 and the 1 / 4 wave plate 102, reducing the error caused by the inability to close.

[0047] Further preferably, the height of the side surface of the fork body component 100 is greater than or equal to twice the width of the bottom end surface, thereby reducing the influence of stray magnetic fields and improving measurement accuracy.

[0048] In some embodiments, an auxiliary support portion is provided at the position where the first end of the measuring rod 200 is connected to the bottom of the fork body component 100. As shown in the figure, the auxiliary support portion can be provided around the connection point, so that the connection between the measuring rod 200 and the fork body component 100 has higher reliability and stability.

[0049] In order to facilitate the operation of the aluminum electrolysis cell optical fiber current measuring instrument, the second end of the measuring rod 200 is provided with a handle, and the current collector 300 is arranged at the front end of the handle. In this way, the operator can conveniently operate the current collector 300 and record relevant information when measuring the anode current or cathode current.

[0050] like Figure 3 As shown, the embodiment of the present application provides a compensation method for the optical fiber current measuring instrument for aluminum electrolysis cell described in any one of the above items, comprising the following steps:

[0051] S100: Use the optical fiber current measuring instrument for aluminum electrolysis cell to measure the current value I of the anode guide rod / cathode steel rod under test of the aluminum electrolysis cell A1 ~I An and I B1 ~I Bn , where A1~An and B1~Bn represent the serial numbers of the anode guide rod / cathode steel bar on the A side and the anode guide rod / cathode steel bar on the B side of the aluminum electrolytic cell, respectively. Figure 4 As shown, side A and side B are opposite sides.

[0052] S200: Obtain the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side; and calculate the current value I of the anode guide rod / cathode steel rod to be measured according to the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side. A1 ~I An and I B1 ~I Bn Compensation is performed to obtain the final current detection value. Because the optical fiber reflector and the 1 / 4 wave plate optical path in the aluminum electrolytic cell optical fiber current measuring instrument are not closed, the current measurement result of the anode guide rod / cathode steel rod to be measured inside the fork body component is compensated to obtain the current detection value, thereby achieving accurate measurement of the current value in each anode guide rod / cathode steel rod in the aluminum electrolytic cell. The technical solution of the present application can be reliably applied in the current distribution measurement of aluminum electrolytic cells, with high measurement efficiency.

[0053] The figure of the present application shows an example of the anode guide rod. In actual testing, the method of measuring the current of the anode guide rod and the cathode steel rod using the optical fiber current measuring instrument for the aluminum electrolytic cell of the present application is the same.

[0054] The compensation method provided in this application may include two methods, namely:

[0055] Method 1:

[0056] S101: Obtain the total anode / cathode current of the A side of the aluminum electrolysis cell: I A =I A1 +I A2 +...I An ; Obtain the total anode / cathode current of the B side of the aluminum electrolysis cell: I B =I B1 +I B2 +...I Bn ; Obtain the total anode / cathode current on both sides of the aluminum electrolysis cell A and B: I = I A +I B .

[0057] That is, the sum of the current values ​​of each anode guide rod or cathode steel rod detected directly using the Faraday magneto-optical effect. This result has a certain error because the optical path between the fiber optic reflector and the 1 / 4 wave plate is not closed.

[0058] S102: Obtaining the total current I of all anode guide rods / cathode steel bars of the aluminum electrolysis cell s .

[0059] That is, the total current of the anode or cathode of the aluminum electrolysis cell can be detected directly using a current sensor.

[0060] S103: Obtaining current compensation coefficient K=I / I s As the A side anode / cathode current compensation coefficient and the B side anode / cathode current compensation coefficient.

[0061] In this step, the value of the compensation coefficient can be obtained by directly dividing the result of step S102 by the structure of step S101.

[0062] S104: Compensate the current value I of the anode guide rod / cathode steel rod to be measured according to the compensation coefficient A1 ~I An and I B1 ~I Bn Compensation is performed to obtain the final current detection value: I Ai’ =I Ai / K;I Bi’ =I Bi / K, i=1,2,……n.

[0063] In this step, the compensation coefficient is directly used to compensate and correct the current value directly detected by the Faraday magneto-optical effect in step S101, so as to obtain an accurate final current detection value of the anode guide rod / cathode steel rod.

[0064] Method 2:

[0065] S201: Through the calibration test, the auxiliary optical fiber measuring instrument is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolytic cell. a1’ ~I an’ and I b1’ ~I bn’ ; The optical fiber current measuring instrument for aluminum electrolysis cell is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolysis cell. A1 ~I An and I B1 ~I Bn In this step, the auxiliary optical fiber measuring instrument is an optical fiber measuring instrument with higher precision, for example, an optical fiber measuring instrument with a closed optical path of an optical fiber reflector and a 1 / 4 wave plate.

[0066] S202: Establish compensation model:

[0067]

[0068]

[0069] Among them, K Aa , K Ab , K Ac K is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the A side being affected by the currents of the i-1th, i-th, and i+1th anode guide rods / cathode steel rods respectively; Ba , K Bb , K Bc is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the B side being affected by the currents of the i-1, i, and i+1 anode guide rods / cathode steel rods respectively.

[0070] That is, because the optical path between the optical fiber reflector and the 1 / 4 wave plate of the aluminum electrolytic cell optical fiber current measuring instrument is not closed, when measuring the i-th anode or cathode, it will be affected by the current of the i-1th and i+1th anodes or cathodes.

[0071] S203: Obtain K by solving the compensation model Aa , K Ab , K Ac and K Ba , K Bb , K Bc .

[0072] In specific implementation, K can be obtained by least squares regression method. Aa , K Ab , K Ac and K Ba , K Bb , K Bc .

[0073] S204: The current value I of the anode guide rod / cathode steel rod to be measured A1 ~I An and I B1 ~I Bn With K Aa , K Ab , K Ac and K Ba , K Bb , K Bc Substitute into the compensation model to get the final current detection value: I Ai’ =IM A *K A ;I Bi’ =IM B *K B Taking the anode rod current detection on the A side as an example, in the specific implementation, let:

[0074]

[0075] Then K=(IM T IM) -1 IM T I', thus, as long as IM and K are determined, I' can be solved, and I' is the final current detection value. Among them, IM is the measurement result obtained by measuring the current value of the anode guide rod / cathode steel rod under test by the optical fiber measuring instrument. Since the optical fiber reflector and the 1 / 4 wave plate optical path are not closed, the accuracy of the measurement value is not high. I' is the measurement result obtained by measuring the current value of the anode guide rod / cathode steel rod under test by an auxiliary optical fiber current measuring instrument, and the measurement result is accurate. The matrix K can be estimated by the least squares method, so that according to IM*K, a more accurate current value of the anode guide rod / cathode steel rod under test can be obtained after compensation.

[0076] An embodiment of the present application also provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the compensation method for the aluminum electrolysis cell optical fiber current measuring instrument described in any one of the above method embodiments.

[0077] The present application also provides an electronic device, such as Figure 5As shown, the electronic device includes at least one processor 101 and at least one memory 102, at least one of the memories 102 stores program information, and at least one of the processors 101 reads the program information and executes the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument described in any one of the above method embodiments. The device may also include: an input device 103 and an output device 104. The processor 101, the memory 102, the input device 103 and the output device 104 can be connected in communication. The memory 102, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The processor 101 executes various functional applications and data processing by running the non-volatile software programs, instructions and modules stored in the memory 102, that is, the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument provided by any of the above schemes is realized. The memory 102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument, etc. In addition, the memory 102 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 102 may optionally include a memory remotely arranged relative to the processor 101, and these remote memories may be connected to a device for executing the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof. The input device 103 may receive input user clicks, and generate signal inputs related to user settings and function controls of the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument. The output device 104 may include a display device such as a display screen. When the one or more modules are stored in the memory 102, when they are run by the one or more processors 101, the compensation method of the aluminum electrolytic cell optical fiber current measuring instrument in any of the above-mentioned method embodiments is executed.

[0078] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0079] The above are only the principles and preferred embodiments of the present application. It should be noted that, for ordinary technicians in this field, on the basis of the principles of the present application, several other modifications can be made, which should also be considered as the protection scope of the present application.

Claims

1. An optical fiber current measuring instrument for an aluminum electrolysis cell, characterized in that: include: A fork body component having an opening, the width of which is adapted to the width of an anode guide rod / cathode steel rod of an aluminum electrolytic cell; A measuring rod, a first end of which is detachably connected to the bottom of the fork body component; A current collector is arranged at the second end of the measuring rod; The measuring optical fiber is arranged inside the fork body component, and includes a polarization-maintaining optical fiber, a quarter wave plate, a circularity-maintaining optical fiber and an optical fiber reflector. The quarter wave plate and the optical fiber reflector are respectively located at the top of both ends of the fork body opening; the polarization-maintaining optical fiber extends along the measuring rod and is connected to the collection connector of the current collector; The current collector compensates the current measurement result of the anode guide rod / cathode steel rod under test inside the fork body component to obtain a current detection value.

2. The optical fiber current measuring instrument for aluminum electrolysis cell according to claim 1, characterized in that: The fork body component comprises a bottom end surface and a group of side surfaces, wherein the group of side surfaces are respectively and vertically arranged on two sides of the bottom end surface.

3. The optical fiber current measuring instrument for aluminum electrolysis cell according to claim 2, characterized in that: The height of the side surface of the fork body component is greater than or equal to twice the width of the bottom end surface.

4. The optical fiber current measuring instrument for aluminum electrolysis cell according to any one of claims 1 to 3, characterized in that: An auxiliary support portion is provided at a position where the first end of the measuring rod is connected to the bottom of the fork body component.

5. The optical fiber current measuring instrument for aluminum electrolysis cell according to claim 4, characterized in that: The second end of the measuring rod is provided with a handle, and the current collector is arranged at the front end of the handle.

6. A compensation method for the optical fiber current measuring instrument for aluminum electrolysis cell according to any one of claims 1 to 5, characterized in that: The steps include: The optical fiber current measuring instrument for aluminum electrolysis cell is used to measure the current value I of the anode guide rod / cathode steel rod under test of the aluminum electrolysis cell. A1 ~I An and I B1 ~I Bn , wherein A1~An, B1~Bn represent the serial numbers of the anode guide rod / cathode steel bar on the A side and the anode guide rod / cathode steel bar on the B side of the aluminum electrolytic cell, respectively, and the A side and the B side are opposite sides; Obtain the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side; and calculate the current value I of the anode guide rod / cathode steel rod to be measured according to the anode / cathode current compensation coefficient on the A side and the anode / cathode current compensation coefficient on the B side. A1 ~I An and I B1 ~I Bn Compensation is performed to obtain the final current detection value.

7. The compensation method of the optical fiber current measuring instrument for aluminum electrolysis cell according to claim 6, characterized in that: The anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side are obtained; the current value I of the anode guide rod / cathode steel rod to be measured is respectively calculated according to the anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side. A1 ~I An and I B1 ~I Bn Compensation, including: Get the total anode / cathode current of the A side of the aluminum electrolysis cell: I A =I A1 +I A2 +...I An ; Obtain the total anode / cathode current of the B side of the aluminum electrolysis cell: I B =I B1 +I B2 +...I Bn ; Obtain the total anode / cathode current on both sides of the aluminum electrolysis cell A and B: I = I A +I B ; Get the total current I of all anode guide rods / cathode steel bars of the aluminum electrolysis cell s ; Get the current compensation coefficient K = I / I s As the anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side; According to the compensation coefficient, the current value I of the anode guide rod / cathode steel rod to be measured A1 ~I An and I B1 ~I Bn Compensation is performed to obtain the final current detection value: I Ai’ =I Ai / K;I Bi’ =I Bi / K, i=1,2,……n.

8. The compensation method of the optical fiber current measuring instrument for aluminum electrolysis cell according to claim 6, characterized in that: The anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side are obtained; the current value I of the anode guide rod / cathode steel rod to be measured is respectively calculated according to the anode / cathode current compensation coefficient of the A side and the anode / cathode current compensation coefficient of the B side. A1 ~I An and I B1 ~I Bn Compensation, including: Through the calibration test, the auxiliary optical fiber measuring instrument is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolytic cell. a1’ ~I an’ and I b1’ ~I bn’ ; The optical fiber current measuring instrument for aluminum electrolysis cell is used to measure the current value I of the anode guide rod / cathode steel rod of the aluminum electrolysis cell. A1 ~I An and I B1 ~I Bn ; Building a compensation model: Among them, K Aa , K Ab , K Ac K is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the A side being affected by the currents of the i-1th, i-th, and i+1th anode guide rods / cathode steel rods respectively; Ba , K Bb , K Bc is the compensation coefficient for the current measurement result of the i-th anode guide rod / cathode steel rod on the B side being affected by the currents of the i-1th, i, and i+1th anode guide rods / cathode steel rods respectively; According to the compensation model, K is obtained Aa , K Ab , K Ac and K Ba , K Bb , K Bc ; The current value I of the anode guide rod / cathode steel rod to be measured A1 ~I An and I B1 ~I Bn With K Aa , K Ab , K Ac and K Ba , K Bb , K Bc Substitute them into the compensation model respectively to obtain the final current detection value.

9. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the compensation method for the aluminum electrolysis cell optical fiber current measuring instrument described in any one of claims 6-8 are implemented.

10. An electronic device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the compensation method for the aluminum electrolysis cell optical fiber current measuring instrument according to any one of claims 6 to 8.

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