Method, system and related equipment for adjusting control rod position detector signal parameters

Abstract

The application provides a control rod position detector signal parameter adjustment method and device and related equipment, including: collecting the induced voltage data of each detection coil in the control rod position detector corresponding to the control rod, and generating the corresponding induced voltage curve according to the induced voltage data; performing sliding average processing on the induced voltage curve corresponding to each detection coil to obtain the smooth induced voltage curve corresponding to each detection coil; performing differential processing on the smooth induced voltage curve corresponding to each detection coil to obtain the induced voltage derivative curve corresponding to each detection coil; determining a plurality of control rod position mutation points on each induced voltage derivative curve according to a preset derivative threshold; determining a plurality of groups of coil voltage values on the corresponding induced voltage curve according to the plurality of control rod position mutation points, and calculating the coil voltage threshold of each detection coil at each characteristic rod position according to the plurality of groups of coil voltage values. The embodiment of the application can realize automatic calculation of the coil voltage threshold.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear power plant commissioning, and in particular to a control rod position detector signal parameter adjustment method and device and related equipment. BACKGROUND

[0002] The control rod is used for the reactivity control of the reactor core and provides shutdown margin. The real position of the control rod in the reactor is measured by a rod position detector. A magnetic drive rod moves in multiple groups of windings in the rod position detector. The induced voltage of the multiple groups of secondary windings is processed by a preset coil voltage threshold to obtain an induced signal representing the position of the drive rod, and then the position of the drive rod is calculated to obtain the control rod position.

[0003] In related technologies, the adjustment of the coil voltage threshold is performed by recording the coil voltage output of each specific control rod position of the control rod, statistically averaging the coil voltage output, and calculating the coil voltage threshold using a threshold calculation formula. The entire measurement process requires a test personnel to manually measure the coil output value and manually record and calculate the coil threshold parameter according to the measurement result. The entire measurement process requires recording tens of thousands of data, resulting in low efficiency and affecting the normal commissioning process of the nuclear power plant. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a control rod position detector signal parameter adjustment method and device and related equipment, which can automatically calculate the coil voltage threshold.

[0005] In a first aspect, an embodiment of the present application provides a control rod position detector signal parameter adjustment method, comprising:

[0006] During the movement of the control rod, the induced voltage data of each detection coil in the rod position detector corresponding to the control rod is collected, and a corresponding induced voltage curve is generated according to the induced voltage data;

[0007] The induced voltage curve corresponding to each detection coil is subjected to a sliding average processing to obtain a smooth induced voltage curve corresponding to each detection coil;

[0008] The smooth induced voltage curve corresponding to each detection coil is subjected to a differential processing to obtain an induced voltage derivative curve corresponding to each detection coil;

[0009] A plurality of control rod position mutation points are determined on each induced voltage derivative curve according to a preset derivative threshold;

[0010] According to the plurality of control rod position mutation points, a plurality of groups of coil voltage values are determined on the corresponding induced voltage curves, and according to the plurality of groups of coil voltage values, a coil voltage threshold value of each detection coil at each characteristic rod position is calculated.

[0011] In some embodiments, the sliding average processing of the induced voltage curve corresponding to each detection coil is performed to obtain a smooth induced voltage curve corresponding to each detection coil, including:

[0012] A sliding average window of a preset width is obtained, and a center point of the sliding average window is sequentially aligned with each data point of the induced voltage curve;

[0013] At each alignment position, an arithmetic mean value of all data points in the sliding average window is calculated, and a data point at the alignment position is updated to the arithmetic mean value;

[0014] All updated data points are connected to obtain the smooth induced voltage curve.

[0015] In some embodiments, according to a preset derivative threshold, a plurality of control rod position mutation points are determined on each induced voltage derivative curve, including:

[0016] Based on the derivative threshold, a plurality of mutation data points with a derivative absolute value greater than the derivative threshold are identified on each induced voltage derivative curve;

[0017] A time point corresponding to each mutation data point on the induced voltage derivative curve of each detection coil is determined as the control rod position mutation point.

[0018] In some embodiments, according to the plurality of control rod position mutation points, a plurality of groups of coil voltage values are determined on the corresponding induced voltage curves, and according to the plurality of groups of coil voltage values, a coil voltage threshold value of each detection coil at each characteristic rod position is calculated, including:

[0019] Based on the plurality of control rod position mutation points, each induced voltage curve is divided into a plurality of characteristic rod positions;

[0020] A plurality of groups of coil voltage values are collected in each characteristic rod position, and the plurality of groups of coil voltage values in each characteristic rod position are arithmetically averaged to obtain an average voltage value in each characteristic rod position;

[0021] The average voltage value in each characteristic rod position is determined as a coil voltage threshold value of the corresponding detection coil in the characteristic rod position.

[0022] In some embodiments, the control rod is driven by a control rod drive apparatus, the rod position detector is moved, for a first detection coil of the rod position detector close to the control rod drive apparatus, after a sliding average processing is performed on an induced voltage curve formed by the induced voltage data corresponding to each of the detection coils to obtain a smoothed induced voltage curve corresponding to each of the detection coils, the method further comprises:

[0023] identifying a plurality of local maximum points on the smoothed induced voltage curve corresponding to the first detection coil by a sliding search window of a preset width;

[0024] removing abnormal points in the plurality of local maximum points by a preset maximum value threshold to obtain a plurality of rod position feature points;

[0025] determining a plurality of local peak maximum voltage values and a plurality of local trough maximum voltage values on the induced voltage curve corresponding to the first detection coil;

[0026] calculating a coil voltage threshold corresponding to each of the rod position feature points for the first detection coil according to the plurality of local peak maximum voltage values and the plurality of local trough maximum voltage values.

[0027] In some embodiments, the removing abnormal points in the plurality of local maximum points by a preset maximum value threshold to obtain a plurality of rod position feature points comprises:

[0028] for each of the local maximum values, when the local maximum value is less than or equal to the maximum value threshold, determining it as the rod position feature point;

[0029] when the local maximum value is greater than the maximum value threshold, determining it as an abnormal point and removing it from the plurality of local maximum points.

[0030] In some embodiments, the determining a plurality of local peak maximum voltage values and a plurality of local trough maximum voltage values on the induced voltage curve corresponding to the first detection coil comprises:

[0031] determining the induced voltage of each of the rod position feature points as a local peak maximum voltage value, and searching for the nearest two local minimum points on the induced voltage curve on the left and right sides thereof, respectively;

[0032] determining the induced voltage of the local minimum point with a greater induced voltage of the two local minimum points as a local trough maximum voltage value.

[0033] In some embodiments, the calculating a coil voltage threshold corresponding to each of the rod position feature points for the first detection coil according to the plurality of local peak maximum voltage values and the plurality of local trough maximum voltage values comprises:

[0034] According to each of the local peak maximum voltage value and the corresponding local valley maximum voltage value, a callback voltage value is calculated;

[0035] Based on the callback voltage value, a coil voltage threshold value of the first detection coil corresponding to each of the rod position feature points is calculated.

[0036] In some embodiments, after determining a plurality of groups of coil voltage values on the corresponding induced voltage curves according to the plurality of control rod rod position mutation points, and calculating a coil voltage threshold value of each detection coil at each feature rod position according to the plurality of groups of coil voltage values, the method further comprises:

[0037] Comparing the coil voltage threshold value of each detection coil at each feature rod position with a preset standard coil voltage threshold value;

[0038] When the deviation of the coil voltage threshold value of any detection coil at any feature rod position from the standard coil voltage threshold value exceeds a preset threshold range, calibrating the standard coil voltage threshold value according to the actual coil voltage threshold value of each detection coil at each feature rod position to obtain a calibrated standard coil voltage threshold value;

[0039] Updating the calibrated standard coil voltage threshold value as the coil voltage threshold parameter of the control rod rod position detector.

[0040] In a second aspect, the embodiments of the present application provide a control rod rod position detector signal parameter adjustment system for implementing the control rod rod position detector signal parameter adjustment method of the first aspect, comprising:

[0041] Controlling each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line as an alternative clock signal in the clock signal line;

[0042] Obtaining the alternative clock signal in each of the clock signal lines through a phase synchronization module, and determining a phase synchronization signal from a plurality of the alternative clock signals according to a preset signal determination rule;

[0043] Controlling a sine wave generator to process the direct current voltage output by the transformer based on the phase synchronization signal, so as to provide an excitation voltage with the same frequency and the same phase to each control rod rod position detector.

[0044] In a third aspect, the embodiments of the present application provide a control rod rod position detector signal parameter adjustment device, comprising:

[0045] The acquisition module is configured to acquire induced voltage data of each detection coil in the rod position detector corresponding to the control rod during movement of the control rod, and generate a corresponding induced voltage curve according to the induced voltage data.

[0046] a sliding average module, configured to perform sliding average processing on the induced voltage curve corresponding to each of the detection coils to obtain a smoothed induced voltage curve corresponding to each of the detection coils;

[0047] a differential module, configured to perform differential processing on the smoothed induced voltage curve corresponding to each of the detection coils to obtain an induced voltage derivative curve corresponding to each of the detection coils;

[0048] an identification module, configured to determine a plurality of control rod position mutation points on each of the induced voltage derivative curves according to a preset derivative threshold;

[0049] a calculation module, configured to determine a plurality of groups of coil voltage values on the corresponding induced voltage curve according to the plurality of control rod position mutation points, and calculate a coil voltage threshold of each detection coil at each characteristic rod position according to the plurality of groups of coil voltage values.

[0050] An electronic device is provided in the embodiments of the present application, which includes a memory and a processor. The memory stores a computer program. The processor implements the control rod position detector signal parameter adjustment method according to any one of the embodiments of the first aspect of the present application when executing the computer program.

[0051] In a fifth aspect, a computer readable storage medium is provided in the embodiments of the present application. The storage medium stores a program. The program is executed by a processor to implement the control rod position detector signal parameter adjustment method according to any one of the embodiments of the first aspect of the present application.

[0052] The control rod position detector signal parameter adjustment method according to the embodiments of the present application has at least the following beneficial effects:

[0053] The control rod position detector signal parameter adjustment method according to the embodiments of the present application includes: collecting induced voltage data of each detection coil in a rod position detector corresponding to a control rod, and generating a corresponding induced voltage curve according to the induced voltage data; performing sliding average processing on the induced voltage curve corresponding to each detection coil to obtain a smoothed induced voltage curve corresponding to each detection coil; performing differential processing on the smoothed induced voltage curve corresponding to each detection coil to obtain an induced voltage derivative curve corresponding to each detection coil; determining a plurality of control rod position mutation points on each induced voltage derivative curve according to a preset derivative threshold; determining a plurality of groups of coil voltage values on the corresponding induced voltage curve according to the plurality of control rod position mutation points, and calculating a coil voltage threshold of each detection coil at each characteristic rod position according to the plurality of groups of coil voltage values.

[0054] The application can effectively remove high-frequency noise interference in the curve by collecting the induced voltage data of each detection coil during the movement of the control rod, generating the corresponding induced voltage curve, and then performing sliding average processing on the induced voltage curve, so that the curve becomes smooth, and the accuracy and reliability of subsequent rod position mutation point identification are improved. Then, by performing differential processing on the smoothed induced voltage curve, the induced voltage derivative curve is obtained, which can highlight the sharp change characteristics of the induced voltage at the control rod position mutation point, so as to accurately identify the rod position mutation point. According to the preset derivative threshold, a plurality of control rod position mutation points are determined on the induced voltage derivative curve, so that the key position change point of the control rod during movement can be automatically, quickly and accurately identified. Finally, according to the rod position mutation point on the induced voltage curve, a plurality of groups of coil voltage values are determined, and the coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the coil voltage threshold, so that the coil voltage threshold of the detection coil at different rod positions can be automatically obtained, the inefficiency and inaccuracy of traditional manual parameter adjustment are avoided, the control rod position mutation point is automatically identified, and the coil voltage threshold of the detection coil at the characteristic rod position is automatically calculated.

[0055] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0056] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0057] Figure 1 A control rod position detector working principle diagram provided for the embodiment of the application is provided;

[0058] Figure 2 An optional control rod position detector signal parameter adjustment method flowchart provided for the embodiment of the application is provided;

[0059] Figure 3 A schematic diagram of smoothed induced voltage provided for the embodiment of the application is provided;

[0060] Figure 4 Another optional control rod position detector signal parameter adjustment method flowchart provided for the embodiment of the application is provided;

[0061] Figure 5 A schematic diagram of feature rod position identification provided for the embodiment of the application is provided;

[0062] Figure 6 Another optional control rod position detector signal parameter adjustment method flowchart provided for the embodiment of the application is provided;

[0063] Figure 7Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 6.

[0064] Figure 8 A feature rod position identification diagram provided by the embodiment of the present application is shown in FIG. 7.

[0065] Figure 9 Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 8.

[0066] Figure 10 Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 9.

[0067] Figure 11 A local extreme point search and abnormal point removal diagram provided by the embodiment of the present application is shown in FIG. 10.

[0068] Figure 12 Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 11.

[0069] Figure 13 A rod position feature point diagram of a first detection coil provided by the embodiment of the present application is shown in FIG. 12.

[0070] Figure 14 Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 13.

[0071] Figure 15 Another optional control rod position detector signal parameter adjustment method flow chart provided by the embodiment of the present application is shown in FIG. 14.

[0072] Figure 16 A control rod position detector signal parameter adjustment system diagram provided by the embodiment of the present application is shown in FIG. 15.

[0073] Figure 17 A control rod position detector signal parameter adjustment device diagram provided by the embodiment of the present application is shown in FIG. 16.

[0074] Figure 18 A hardware structure diagram of an electronic device provided by the embodiment of the present application is shown in FIG. 17. DETAILED DESCRIPTION

[0075] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0076] In the description of the present application, several meanings are one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0077] In the description of the present application, it should be understood that, in relation to the description of the position, for example, the position or location relationship indicated by up, down, left, right, front, back, etc. is based on the position or location relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application.

[0078] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] In the description of the present application, it should be noted that, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution. In addition, the identification of the specific steps in the following does not represent the limitation of the order and execution logic of the steps, and the execution order and execution logic between the steps should be understood and inferred with reference to the content expressed in the embodiments.

[0080] The control rod is used for the reactivity control of the reactor core and provides shutdown margin, which is crucial for the safety of the reactor. The real position of the control rod in the reactor is monitored by the rod position indication system (RPI). The control rod assembly is connected with the drive rod, and the rod position detector of the RPI actually measures the position of the drive rod to indirectly determine the position of the control rod assembly in the core.

[0081] The principle of the control rod position detector is as follows Figure 1As shown, the magnetic drive rod moves in multiple sets of windings, and the induced voltage of the windings is processed by the RPI system to obtain a binary signal ("0" or "1") representing the position of the drive rod. The position of the drive rod is calculated by processing the signal to obtain the control rod position.

[0082] Due to inevitable electromagnetic interference and system power supply voltage fluctuations, it is necessary to set the coil threshold value appropriately, and inappropriate coil threshold value will cause the rod position measured by the RPI system to fluctuate unexpectedly when the drive rod position is unchanged, thereby affecting the monitoring of the control rod position. In order to set the correct coil threshold value, it is necessary to adjust and verify the coil threshold value and the back difference of the control rod position detector during system debugging. Figure 1

[0083] In the prior art, the prior art for adjusting the threshold value of the rod position detector coil A includes: 1) by the reactor operator lifting and inserting the control rod at a specific speed; 2) using a recorder to record the A coil output signal during the movement of the control rod; 3) manually finding the characteristic point voltage of the recorded data curve; 4) using a calculation formula to calculate the A coil threshold value.

[0084] To adjust the threshold value of the rod position detector coil B / C / D / E, including: 1) by the reactor operator moving the control rod to a series of specific positions (characteristic rod positions) on the DCS; 2) at each specific control rod position state, record the maximum, minimum and average value of the B / C / D / E coil output signal within a period of time (usually about 10s) by measuring instrument; 3) statistics of all specific control rod position state coil output signal, using a calculation formula to calculate the B / C / D / E coil threshold value.

[0085] As can be seen, the entire measurement process of the prior art requires the test personnel to manually measure the coil output value and manually record and calculate the coil threshold value according to the measurement results. Taking a series of pressurized water reactor models as an example, there are 61 control rods in the core, 4 coils need to be measured, and 3 groups of data need to be recorded at 41 characteristic rod position states. Calculation shows that all the rod bundles need to measure at least 30012 groups of data, and the existing technology needs to wait for the operator to operate the window at the characteristic rod position. The above factors lead to low efficiency, high manpower requirement, and the calculation results are seriously dependent on the tester, thereby affecting the debugging process of the nuclear power plant.

[0086] ​Based on this, the application can effectively remove the high-frequency noise interference in the curve, make the curve smooth, and improve the accuracy and reliability of subsequent rod position mutation point identification by collecting the induced voltage data of each detection coil during the movement of the control rod, generating the corresponding induced voltage curve, and then performing sliding average processing on the induced voltage curve. Then, by performing differential processing on the smoothed induced voltage curve, the induced voltage derivative curve is obtained, which can highlight the sharp change characteristics of the induced voltage at the control rod position mutation point, thereby accurately identifying the rod position mutation point. According to the preset derivative threshold, multiple control rod position mutation points are determined on the induced voltage derivative curve, which can automatically, quickly and accurately identify the key position change point of the control rod during movement. Finally, according to the rod position mutation points, multiple groups of coil voltage values are determined on the induced voltage curve, and the coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the coil voltage threshold, which can automatically obtain the coil voltage threshold of the detection coil at different rod positions, avoid the inefficiency and inaccuracy of traditional manual parameter adjustment, automatically identify the control rod position mutation point, and then automatically calculate the coil voltage threshold of the detection coil at the characteristic rod position.

[0087] Please refer to Figure 2 The control rod position detector signal parameter adjustment method provided by the embodiment of the application can include, but is not limited to, the following steps 201 to 205:

[0088] Step 201: During the movement of the control rod, the induced voltage data of each detection coil in the corresponding rod position detector of the control rod is collected, and the corresponding induced voltage curve is generated according to the induced voltage data.

[0089] Step 202: The induced voltage curve corresponding to each detection coil is subjected to sliding average processing to obtain the smoothed induced voltage curve corresponding to each detection coil.

[0090] Step 203: The smoothed induced voltage curve corresponding to each detection coil is subjected to differential processing to obtain the induced voltage derivative curve corresponding to each detection coil.

[0091] Step 204: According to the preset derivative threshold, multiple control rod position mutation points are determined on each induced voltage derivative curve.

[0092] Step 205: According to the multiple control rod position mutation points, multiple groups of coil voltage values are determined on the corresponding induced voltage curve, and the coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the multiple groups of coil voltage values.

[0093] In step 201 of some embodiments, as the control rod moves axially within the rod position detector driven by its drive device, a voltage signal is induced in the detection coil. A signal acquisition device mounted on the rod position detector collects real-time data on the changes in the induced voltage of each detection coil during control rod movement. The collected induced voltage data corresponds one-to-one with the control rod's movement position, reflecting the axial position distribution of the control rod within the rod position detector. The collected induced voltage data is arranged in chronological order to generate an induced voltage curve reflecting the continuous control rod movement process. The abscissa of this curve represents time or control rod displacement distance, and the ordinate represents the induced voltage value of the detection coil. Each point on the curve corresponds to the coil induced voltage when the control rod moves to a certain position. Generating this induced voltage curve visually reflects the continuous changes in the detection coil induced voltage during control rod movement, laying a data foundation for subsequent analysis of the characteristic rod position of the control rod.

[0094] In step 202 of some embodiments, during actual control rod movement, the induced voltage signal collected by the detection coil often contains noise and fluctuations due to factors such as electromagnetic interference and mechanical vibration. This noise and fluctuation manifests as numerous local fluctuations and spikes on the induced voltage curve. Direct analysis of the raw induced voltage curve could misidentify these local fluctuations as characteristic control rod positions, leading to inaccurate subsequent determination of rod position mutation points. To mitigate such misjudgments, the induced voltage curve needs to be smoothed to mitigate the impact of local noise.

[0095] like Figure 3 As shown in Figure 1, sliding average processing is a commonly used signal smoothing method. Its basic concept is to slide a fixed-width window across the signal sequence, averaging the data within the window each time, and replacing the original value at the center of the window with the average value to achieve signal smoothing. This sliding average process effectively suppresses short-term noise and spikes in the induced voltage curve, making the curve smoother and highlighting the main changing trends of the induced voltage during control rod movement.

[0096] See also Figure 4 In some embodiments, step 202 may also include, but is not limited to, steps 401 to 403.

[0097] Step 401: Obtain a sliding average window of a preset width, and align the center point of the sliding average window with each data point of the induced voltage curve in sequence;

[0098] Step 402: At each alignment position, calculate the arithmetic mean of all data points within the sliding average window, and update the data point at the alignment position to the arithmetic mean;

[0099] Step 403, connect all the updated data points, get the smooth induction voltage curve.

[0100] In step 401 of some embodiments, the sliding average processing needs to set a fixed width time window, which slides on the induction voltage curve for selecting the data range for average calculation. The width of the window is usually pre-set according to the control rod moving speed, data sampling frequency and other factors to ensure the smoothing effect and the retention of mutation points. The center point of the sliding average window is aligned with each data point of the induction voltage curve in turn, that is, taking each data point as the center, the window extends half the window width to the front and back, forming a symmetrical data interval. Through the sliding of the window, the local data segment centered on each data point can be selected in turn.

[0101] In step 402 of some embodiments, for each alignment position, the induction voltage values of all data points contained in the sliding average window are arithmetically averaged to obtain a local average value. This average value reflects the overall level of the induction voltage in the local data segment, effectively weakening the influence of local noise and fluctuations. The original induction voltage value at the center point of the window is updated to the calculated local average value, that is, the smoothing processing of the data point is completed. Through point-by-point updating, each data point on the induction voltage curve is replaced by the average voltage value in its local neighborhood, and the overall curve becomes smoother.

[0102] In step 403 of some embodiments, all data points on the induction voltage curve are updated in turn to the average value in the corresponding local interval. Connecting these updated data points in time sequence, we get the smoothed induction voltage curve. The smoothed induction voltage curve is smoother in shape, and local noise and spikes are effectively suppressed, highlighting the main trend of the induction voltage during the movement of the control rod. At the same time, since the local average is calculated by using the sliding window, the mutation characteristics of the curve are basically retained, except that there may be a certain transition effect at the mutation point.

[0103] It should be noted that the width selection of the sliding average window will affect the smoothing effect. The larger the window width, the more obvious the smoothing effect, but the transition interval of the mutation point will also be wider; the smaller the window width, the better the retention of the mutation point, but the noise suppression effect may be reduced. Therefore, according to the actual signal characteristics and processing requirements, the appropriate window width needs to be selected.

[0104] Through the sliding average processing of steps 401 to 403, the induction voltage curve can be effectively smoothed, laying a good data foundation for subsequent identification of control rod position mutation points. The smoothing processing not only can suppress local noise and interference, but also can avoid a large number of meaningless maximum value points in the subsequent local maximum value search, improving the reliability and accuracy of the control rod position judgment.

[0105] In step 203 of some embodiments, when the control rod moves in the rod position detector, the inductive voltage of the detection coil will change sharply when the control rod passes the position of the detection coil, which is shown as a mutation point on the inductive voltage curve. These mutation points correspond to the characteristic rod position of the control rod, and are the key basis for determining the position of the control rod.

[0106] In order to highlight the mutation point feature on the inductive voltage curve, it is necessary to perform differential processing on the smoothed inductive voltage curve. The differential operation can extract the rate of change information of the curve, and when the curve changes sharply, the differential value (i.e. the slope) will appear a sharp peak. By differentiating the smoothed inductive voltage curve point by point, the inductive voltage derivative curve is obtained, as shown in FIG. 3. The abscissa of the derivative curve is time or control rod displacement distance, and the ordinate is the differential value of the inductive voltage. The sharp peak point on the curve often corresponds to the characteristic position of the control rod passing through the detection coil. The differential processing amplifies the mutation feature of the inductive voltage curve, making the feature point more obvious and easy to identify. By analyzing the distribution of the sharp peaks on the derivative curve, the key position of the control rod in the moving process can be accurately determined. Figure 5

[0107] In step 204 of some embodiments, when the control rod passes the characteristic position of the detection coil, a sharp peak much larger than other positions will appear on the inductive voltage derivative curve. Therefore, a derivative threshold value can be set, and when the derivative value of a point on the derivative curve exceeds the threshold value, it can be determined that the point is a rod position mutation point of the control rod.

[0108] Referring to FIG. 4, in some embodiments, step 204 can further include, but is not limited to, steps 601 to 602. Figure 6

[0109] Step 601: Based on the derivative threshold value, a plurality of mutation data points with absolute derivative values greater than the derivative threshold value are identified on each inductive voltage derivative curve.

[0110] Step 602: The time point corresponding to each mutation data point on the inductive voltage derivative curve of each detection coil is determined as the rod position mutation point of the control rod.

[0111] ​​In step 601 of some embodiments, when the control rod passes through the characteristic position of the detection coil, the derivative value will appear obvious peak or jump. In order to automatically identify these derivative mutation points, it is necessary to set a derivative threshold. Scan the derivative curve of the induced voltage of each detection coil, and compare the absolute value of the derivative of each data point with the size relationship of the derivative threshold. When the absolute value of the derivative of a certain data point exceeds the threshold, it is marked as a mutation data point. The mutation data point corresponds to the peak or jump position on the derivative curve, indicating that the rate of change of the induced voltage is abnormally large, which may correspond to the characteristic position of the control rod passing through the coil. By scanning the entire derivative curve, multiple mutation data points with derivative absolute value greater than the threshold can be identified. The time position of these mutation data points reflects the time when the control rod position may mutate.

[0112] In step 602 of some embodiments, each mutation data point identified in step 601 corresponds to a time coordinate on the derivative curve. These time coordinates reflect the time when the control rod position may mutate, which is the key basis for determining the control rod position. Extract the time coordinates of each mutation data point to determine a control rod position mutation point detected by the detection coil. The time sequence of the rod position mutation points reflects the position change process of the control rod during movement. Analyze the mutation of all coils at each time, and if any coil has a signal mutation, it indicates that the control rod has moved at that time, and that position is the rod position mutation point.

[0113] It should be noted that due to factors such as data sampling frequency and control rod movement speed, there may be a certain time interval between adjacent rod position mutation points identified. These time intervals correspond to the movement of the control rod between adjacent characteristic positions. According to actual needs, the rod position mutation point on the earlier side of the time point can be selected as the criterion for the control rod to reach the characteristic position.

[0114] In specific implementation, a sliding window can be used to scan the derivative curve. If the maximum value of the derivative values in the window exceeds the threshold, the center point of the window is marked as a rod position mutation point. Continuous points that satisfy the threshold condition can be combined into the same mutation point. By scanning the derivative curve of the induced voltage corresponding to each detection coil, all rod position mutation points detected by the coil during the movement of the control rod can be automatically identified, and the automatic positioning of the characteristic position of the control rod is realized. Compared with manual interpretation, this method is fast and accurate, and avoids misjudgment and omission.

[0115] Through steps 601 and 602, all rod position mutation points detected by each detection coil during the movement of the control rod can be automatically identified, and the automatic analysis and extraction of the control rod position change are realized. Compared with manual interpretation, this method is fast and accurate, and avoids subjectivity and omission.

[0116] In step 205 of some embodiments, after identifying all the rod position mutation points in the control rod movement process by step 204, the inductive voltage values of the detection coil at various characteristic rod positions can be further determined, and the coil voltage threshold can be calculated accordingly. The inductive voltage curve can be segmented according to the rod position mutation points, and each segment corresponds to the stable state after the control rod moves to a certain characteristic position. In the time period when the control rod remains stationary, the coil inductive voltage is basically stable within a certain value range. For each characteristic rod position, the inductive voltage values at multiple time points in the corresponding stable inductive voltage time period are uniformly sampled to form a set of steady-state voltage samples. The inductive voltage samples of multiple characteristic rod positions constitute multiple sets of coil voltage values. In order to determine the coil voltage threshold, statistical analysis needs to be performed on each set of steady-state voltage samples. The mean and standard deviation of each set of samples can be calculated, and the mean is taken as the voltage threshold of the coil at the characteristic rod position, and the standard deviation reflects the reliability of the threshold.

[0117] The voltage threshold is an important parameter for judging whether the control rod has reached the target position. When the coil inductive voltage exceeds the threshold value corresponding to the rod position, it can be judged that the control rod has moved to that position. Reasonable threshold setting can not only ensure the sensitivity of control rod position judgment, but also avoid misjudgment.

[0118] By analyzing the detection coil inductive voltage data collected during the movement of the control rod, identifying the rod position mutation points, and calculating the coil voltage threshold at the characteristic position, the optimization and adjustment of the rod position detector signal parameters can be automatically completed, avoiding the tediousness and subjectivity of manual operation. This method simplifies the debugging process, improves the efficiency and accuracy of parameter setting, and has important significance for ensuring the reliable operation of the reactor core control system.

[0119] Please refer to Figure 7 In some embodiments, step 205 can include, but is not limited to, steps 701 to 703.

[0120] Step 701, based on multiple control rod position mutation points, each inductive voltage curve is divided into multiple characteristic rod positions.

[0121] Step 702, multiple sets of coil voltage values are collected at each characteristic rod position, and the multiple sets of coil voltage values in each characteristic rod position are arithmetically averaged to obtain the average voltage value in each characteristic rod position.

[0122] Step 703, the average voltage value in each characteristic rod position is determined as the coil voltage threshold of the corresponding detection coil at the characteristic rod position.

[0123] In step 701 of some embodiments, the induced voltage curve corresponding to each detection coil can be divided into multiple intervals, with the rod position mutation point as the boundary. Each interval corresponds to the stable state after the control rod moves to a characteristic position and is called a characteristic rod position. The division of characteristic rod positions is based on the sudden change in control rod position, rather than on equal time intervals. The time spans of the divided characteristic rod position intervals may not be completely equal, depending on the control rod movement time between adjacent characteristic positions. However, within each characteristic rod position, the control rod position is essentially stable, and the corresponding coil induced voltage is also relatively constant. Therefore, the characteristic rod position is a suitable unit for analyzing coil voltage thresholds.

[0124] like Figure 8 As shown, in some embodiments, in step 702, for each characteristic rod position, the control rod is in a relatively stable position within its time span. Theoretically, the induced voltage of the detection coil within this characteristic rod position should remain constant. However, due to factors such as measurement error and noise, the actual collected coil voltage value may fluctuate. To obtain a reliable reference value for the coil induced voltage within this characteristic rod position, multiple sets of voltage values ​​must be collected within this interval. Based on the data sampling frequency and the time span of the characteristic rod position, several sampling moments can be evenly selected to extract the corresponding coil voltage values, forming multiple sets of voltage samples. The multiple sets of coil voltage values ​​collected within each characteristic rod position are arithmetic averaged to obtain an average voltage value. This average value integrates the results of multiple samplings, reduces the impact of random errors and fluctuations, and more accurately reflects the actual induced voltage level of the detection coil at this characteristic control rod position.

[0125] For each characteristic bar position, a signal of the corresponding coil of a certain width is obtained on the original signal curve. The characteristic value of the coil corresponding to the characteristic bar position can be obtained by calculating the maximum, minimum and average values. Calculating all characteristic bar positions and summarizing the obtained data can obtain the theoretical threshold voltage V for each coil. avg , through V avg Calculate the threshold voltage:

[0126]

[0127] Where e and f are voltage adjustment coefficients, which convert the threshold voltage into the actual hysteresis comparator setting voltage. These factors are determined by the resistors and amplifier multipliers used in the hysteresis comparator circuit. The hysteresis comparator converts the induced voltage output from the secondary coil into a DC voltage representing the amplitude before performing a threshold determination. This determination is made using a hardware circuit (hysteresis comparator). The hysteresis comparator compares the input with the set threshold and outputs a 0 / 1 signal.

[0128] In step 703 of some embodiments, the arithmetic mean of the multiple groups of coil voltage values collected in each feature rod position is calculated to obtain the average voltage value of each feature rod position. These average voltage values reflect the typical level of the induced voltage of the detection coil when the control rod is in different feature positions. The average voltage value of each feature rod position is directly determined as the voltage threshold of the detection coil in the feature rod position. The voltage threshold is an important parameter for determining whether the control rod has reached the target position. When the real-time induced voltage of the detection coil exceeds the voltage threshold of the corresponding feature rod position, it can be determined that the control rod has moved to that position.

[0129] Through steps 701 to 703, the induced voltage threshold of the detection coil in different control rod positions can be automatically, quickly and accurately calculated, laying an important parameter foundation for reliable control rod position monitoring. These thresholds integrate the results of multiple measurements, have high reliability and representativeness, and can accurately reflect the induced voltage characteristics of the detection coil when the control rod is in different positions.

[0130] Please refer to Figure 9 In some embodiments, the control rod is driven by a control rod drive device, and moves in the rod position detector. For the first detection coil near the control rod drive device in the rod position detector, after step 102, steps 901 to 904 can be further included, but are not limited to.

[0131] Step 901: Identify a plurality of local maximum points on the smoothed induced voltage curve corresponding to the first detection coil by a sliding search window with a preset width.

[0132] Step 902: Remove abnormal points in the plurality of local maximum points by a preset maximum value threshold to obtain a plurality of rod position feature points.

[0133] Step 903: Determine a plurality of local peak maximum voltage values and a plurality of local valley maximum voltage values on the induced voltage curve corresponding to the first detection coil.

[0134] Step 904: Calculate the coil voltage threshold of the first detection coil corresponding to each rod position feature point according to the plurality of local peak maximum voltage values and the plurality of local valley maximum voltage values.

[0135] In step 901 of some embodiments, since the first detection coil is close to the control rod drive, there are more interference spikes superimposed on the induced voltage signal in addition to the control rod pitch periodic peaks. In order to identify the true control rod position peaks, a sliding search window method is needed to search for local maximum values on the smoothed induced voltage curve. By sliding the window on the smoothed induced voltage curve, the voltage values of all data points in the window are compared, and the point with the maximum voltage value is found, which is a local maximum point. By sliding search, multiple local maximum points can be identified on the smoothed induced voltage curve corresponding to the first detection coil, including the true control rod position peaks and some interference spikes.

[0136] In step 902 of some embodiments, in order to filter out the true peaks corresponding to the control rod pitch period position from the identified local maximum points, a maximum value threshold needs to be set. The setting of the threshold needs to consider factors such as control rod moving speed, data sampling frequency, signal noise level, and special interference received by the first detection coil, and a suitable empirical value is obtained by analyzing a large amount of measured data. The voltage value of each local maximum point identified is compared with the maximum value threshold, and only the points with voltage values less than the maximum value threshold are kept as candidate rod position feature points. This step can effectively remove the interference spikes with larger voltage values.

[0137] Referring to Figure 10 In some embodiments, step 902 can include but is not limited to steps 1001 to 1002.

[0138] Step 1001, for each local maximum, when the local maximum is less than or equal to the maximum value threshold, it is determined as a rod position feature point.

[0139] Step 1002, when the local maximum is greater than the maximum value threshold, it is determined as an abnormal point and removed from the multiple local maximum points.

[0140] As Figure 11 shown in step 1001 of some embodiments, in order to filter out reliable rod position feature points from local maximum points, the voltage value of each local maximum point needs to be compared with the preset maximum value threshold. The setting of the maximum value threshold needs to consider factors such as control rod moving speed, data sampling frequency, signal noise level, and special interference received by the first detection coil, and a suitable empirical value is obtained by analyzing a large amount of measured data. For each local maximum point, it is determined whether its voltage value is less than or equal to the maximum value threshold. If the voltage value of the local maximum point does not exceed the threshold, it can be preliminarily determined as a possible rod position feature point with a voltage amplitude within a normal range. For example, in Figure 11The maximum threshold in the maximum value can be set to 6, so that all local maximum points less than 6 can be retained, and local maximum points greater than 6 can be removed.

[0141] In step 1002 of some embodiments, for those local maximum points whose voltage values exceed the maximum threshold, it can be determined that they are abnormal points. These abnormal points are likely to be caused by strong electromagnetic interference, and their voltage amplitudes are much higher than the normal control rod position wave peak, and cannot reflect the true control rod position. Removing these abnormal points from the candidate rod position feature points can effectively avoid misjudging the interference spikes as control rod positions in subsequent analysis, and improve the accuracy and reliability of position determination.

[0142] In step 903 of some embodiments, after obtaining reliable rod position feature points in step 902, the maximum voltage value of the local wave peak and the maximum voltage value of the local wave valley need to be extracted on the induced voltage curve. For each rod position feature point, search for the maximum and minimum values of the induced voltage within a certain time range before and after it, respectively as the local wave peak maximum voltage and the local wave valley maximum voltage corresponding to the point. Through this step, the local wave peak maximum voltage and the local wave valley maximum voltage corresponding to each rod position feature point can be obtained, reflecting the change range of the coil induced voltage near the point. This range can be used to determine the voltage threshold of the rod position in the subsequent.

[0143] Please refer to Figure 12 In some embodiments, step 903 can include, but is not limited to, steps 1201 to 1202.

[0144] Step 1201, the induced voltage of each rod position feature point is determined as the local wave peak maximum voltage value, and the nearest two local minimum points are searched on the induced voltage curve on the left and right sides of it.

[0145] Step 1202, the induced voltage of the local minimum point with larger induced voltage among the two local minimum points is determined as the local wave valley maximum voltage value.

[0146] In step 1201 of some embodiments, the induced voltage value at each rod position feature point is directly determined as the local wave peak maximum voltage value of the point. This voltage value represents the maximum amplitude of the coil induced voltage at the feature position. Then, local minimum value search is performed on the induced voltage curve on the left and right sides of each rod position feature point. The local minimum point searched on the left side closest to the rod position feature point represents the wave valley position on the left side of the wave peak; the local minimum point searched on the right side closest to the rod position feature point represents the wave valley position on the right side of the wave peak. The induced voltage curve segment between the two local minimum points completely describes the morphological characteristics of the local wave peak centered on the rod position feature point.

[0147] like Figure 13 As shown, in some embodiments, in step 1202, the nearest local minimum points on either side of each rod position feature point are found, corresponding to the trough positions on the left and right sides of the local peak. Because there may be fluctuations and imbalances during control rod movement, the trough voltage values ​​on the left and right sides may not be completely equal. To determine the maximum trough voltage value of the local peak, the induced voltage values ​​of the two local minimum points are compared, and the larger value is selected as the local maximum trough voltage value. This is because the local minimum point with the larger induced voltage value represents the upper limit of the induced voltage near the peak and better reflects the actual range of the coil voltage at that location.

[0148] In step 904 of some embodiments, the local peak voltage and local valley voltage at each rod position characteristic point obtained in step 903 may be used to calculate the coil voltage threshold at the characteristic rod position.

[0149] See also Figure 14 In some embodiments, step 904 may include, but is not limited to, steps 1401 to 1402.

[0150] Step 1401 : Calculate a callback voltage value according to each local peak maximum voltage value and the corresponding local trough maximum voltage value.

[0151] Step 1402: Calculate the coil voltage threshold corresponding to each rod position feature point of the first detection coil based on the callback voltage value.

[0152] Specifically, the callback voltage V0 = V1 - V2 can be calculated using the local peak maximum voltage value V1 and the local valley maximum voltage value V2. The first coil threshold V can be calculated according to the following formula based on the value of V0: A :

[0153]

[0154] Where a, b, c, and d are voltage threshold adjustment coefficients, which convert the actual threshold value into the set voltage for the hysteresis comparator in the circuit. These coefficients are related to the resistors and amplifier multipliers used in the hysteresis comparator circuit. p is the hysteresis of the hysteresis comparator circuit. Different settings are used for situations where V0 is greater than the hysteresis and for situations where it is less than or equal to the hysteresis to avoid frequent A code jumps.

[0155] Through steps 901 to 904, a series of methods such as sliding window maximum value search, threshold screening, local peak and trough extraction, and threshold calculation are adopted to achieve reliable identification of the characteristic rod position of the control rod and automatic determination of the voltage threshold in a complex interference environment.

[0156] See alsoFigure 15 In some embodiments, after step 205, steps 1501-1503 can also be included, but are not limited to.

[0157] Step 1501, compare the coil voltage threshold of each detection coil at each characteristic rod position with the preset standard coil voltage threshold.

[0158] Step 1502, when the deviation of the coil voltage threshold of any detection coil at any characteristic rod position from the standard coil voltage threshold exceeds the preset threshold range, calibrate the standard coil voltage threshold according to the actual coil voltage threshold of each detection coil at each characteristic rod position to obtain a calibrated standard coil voltage threshold.

[0159] Step 1503, update the calibrated standard coil voltage threshold as the coil voltage threshold parameter of the control rod position detector.

[0160] In step 1501 of some embodiments, in practical applications, the control rod position detector usually presets a set of standard coil voltage thresholds as a reference for determining whether the control rod has reached the characteristic rod position. These standard thresholds are usually derived from design calculations, simulation analysis or historical experience, reflecting the general working state of the detector. In order to evaluate the deviation of the actual working state of the detector from the expected state, the actual coil voltage threshold of each detection coil at each characteristic rod position calculated in step 205 needs to be compared with the preset standard coil voltage threshold one by one. Through comparison, the deviation of the actual threshold from the standard threshold of each detection coil at each characteristic rod position can be obtained, reflecting the change of the actual working state of the detector relative to the expected state.

[0161] In step 1502 of some embodiments, after comparing the deviation of the actual threshold from the standard threshold, it is necessary to judge whether these deviations exceed the preset allowable range. The setting of the threshold range needs to consider the design margin of the detector, the operating condition, the environmental impact and other factors, which can usually be determined according to historical data and expert experience. If the actual threshold of any detection coil at any characteristic rod position deviates beyond the threshold range, it is considered that the actual working state of the detector has deviated significantly from the expected state, and the standard threshold needs to be calibrated to adapt to the change of the state of the detector. The calibration of the standard threshold can be realized by using the actual threshold of all detection coils at all characteristic rod positions to obtain a set of corrected standard thresholds, which are closer to the actual working state of the detector.

[0162] In step 1503 of some embodiments, after obtaining the calibrated standard coil voltage threshold, it is necessary to update it into the working parameters of the control rod position detector, replacing the original standard threshold setting. The updated coil voltage threshold parameter will be directly used for real-time rod position judgment of the detector. When the measured coil voltage drops below the standard threshold of the corresponding characteristic rod position, the detector will give a signal that the control rod is in place for the reactor control and protection system. Through dynamic calibration and updating of the standard threshold, adaptive correction of the control rod position detector can be realized, so that the judgment basis can track the changes of the detector state, and always maintain high reliability and accuracy.

[0163] Referring to Figure 16 , Figure 16 The control rod position detector signal parameter adjustment system provided by the embodiments of the present application includes:

[0164] The rod position measurement cabinet 1601 is used to collect the induced voltage data of each detection coil in the control rod position detector corresponding to the control rod during the movement of the control rod;

[0165] The recorder 1602 is connected with the rod position measurement cabinet 1601 through signal acquisition wiring, and is used to record and store the induced voltage data;

[0166] The host computer 1603 is used to import the induced voltage data from the recorder 1602, and generate the corresponding induced voltage curve according to the imported induced voltage data. The induced voltage curve is subjected to sliding average processing to obtain a smoothed induced voltage curve, and the smoothed induced voltage curve is subjected to differential processing to obtain an induced voltage derivative curve. A plurality of control rod position abrupt change points are determined on each induced voltage derivative curve according to a preset derivative threshold, and a plurality of groups of coil voltage values are determined on the corresponding induced voltage curve according to the plurality of control rod position abrupt change points. The coil voltage threshold of each detection coil at each characteristic rod position is calculated.

[0167] Referring to Figure 17 , the embodiments of the present application also provide a control rod position detector signal parameter adjustment device 1700, which can realize the control rod position detector signal parameter adjustment method described above, and includes:

[0168] The acquisition module 1701 is used to collect the induced voltage data of each detection coil in the control rod position detector corresponding to the control rod during the movement of the control rod, and generate the corresponding induced voltage curve according to the induced voltage data;

[0169] The sliding average module 1702 is used to perform sliding average processing on the induced voltage curve corresponding to each detection coil to obtain the smoothed induced voltage curve corresponding to each detection coil;

[0170] a differential module 1703 configured to perform differential processing on the smooth induction voltage curve corresponding to each detection coil to obtain an induction voltage derivative curve corresponding to each detection coil;

[0171] a recognition module 1704 configured to determine a plurality of control rod position mutation points on each induction voltage derivative curve according to a preset derivative threshold;

[0172] a calculation module 1705 configured to determine a plurality of groups of coil voltage values on the corresponding induction voltage curve according to the plurality of control rod position mutation points, and calculate a coil voltage threshold of each detection coil at each characteristic rod position according to the plurality of groups of coil voltage values.

[0173] According to the control rod position detector signal parameter adjustment method, the induction voltage data of each detection coil in the rod position detector corresponding to the control rod is collected, and the corresponding induction voltage curve is generated according to the induction voltage data. The smooth induction voltage curve corresponding to each detection coil is obtained by performing sliding average processing on the induction voltage curve corresponding to each detection coil. The induction voltage derivative curve corresponding to each detection coil is obtained by performing differential processing on the smooth induction voltage curve corresponding to each detection coil. A plurality of control rod position mutation points are determined on each induction voltage derivative curve according to a preset derivative threshold. A plurality of groups of coil voltage values are determined on the corresponding induction voltage curve according to the plurality of control rod position mutation points, and a coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the plurality of groups of coil voltage values.

[0174] According to the control rod position detector signal parameter adjustment method, the induction voltage data of each detection coil in the rod position detector corresponding to the control rod is collected, and the corresponding induction voltage curve is generated according to the induction voltage data. The smooth induction voltage curve corresponding to each detection coil is obtained by performing sliding average processing on the induction voltage curve corresponding to each detection coil. The induction voltage derivative curve corresponding to each detection coil is obtained by performing differential processing on the smooth induction voltage curve corresponding to each detection coil. A plurality of control rod position mutation points are determined on each induction voltage derivative curve according to a preset derivative threshold. A plurality of groups of coil voltage values are determined on the corresponding induction voltage curve according to the plurality of control rod position mutation points, and a coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the plurality of groups of coil voltage values.

[0175] Reference Figure 18 , Figure 18The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0176] The processor 1801 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits, and is configured to execute related programs to implement the technical solutions provided by the embodiments of the present application.

[0177] The memory 1802 can be implemented by a ROM (Read-Only Memory), a static storage device, a dynamic storage device, or a RAM (Random Access Memory), etc. The memory 1802 can store an operating system and other application programs. When the technical solutions provided by the embodiments of the present application are implemented by software or firmware, the related program codes are stored in the memory 1802 and are called and executed by the processor 1801 to implement the control rod position detector signal parameter adjustment method of the embodiments of the present application.

[0178] The input / output interface 1803 is configured to realize information input and output.

[0179] The communication interface 1804 is configured to realize the communication interaction between the device and other devices. The communication can be realized by a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, Wi-Fi, Bluetooth, etc.).

[0180] The bus 1805 is configured to transmit information between various components (such as the processor 1801, the memory 1802, the input / output interface 1803, and the communication interface 1804) of the device.

[0181] The processor 1801, the memory 1802, the input / output interface 1803, and the communication interface 1804 are connected to each other through the bus 1805 to realize the communication connection between them in the device.

[0182] The embodiments of the present application also provide a computer program product including a computer program. The processor of the computer device reads the computer program and executes it, so that the computer device executes the control rod position detector signal parameter adjustment method as described above.

[0183] The terms "first", "second", "third", "fourth", and the like in the description of the disclosure and the above drawings, if any, are used to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the disclosure described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "contain" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device containing a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0184] It should be understood that in the present disclosure, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases: only A, only B, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0185] It should be understood that in the description of the embodiments of the present application, the meaning of multiple (or multiple) is two or more, greater than, less than, more than, etc. is not included in the number, and above, below, etc. is included in the number.

[0186] In several embodiments provided by the present disclosure, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division, and actual implementation can have another division manner. For example, multiple units or components can be combined or integrated into another system, or some features can be omitted or not implemented. In addition, the coupling or direct coupling or communication connection between the displayed or discussed objects can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0187] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0188] In addition, each functional unit in various embodiments of the present disclosure can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0189] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present disclosure essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present disclosure. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0190] It should also be appreciated that the various embodiments provided by the present application can be combined in any way to achieve different technical effects.

[0191] The above is a specific description of the embodiments of the present disclosure, but the present disclosure is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present disclosure, and these equivalent modifications or replacements are included in the scope defined by the claims of the present disclosure.

Claims

1. A method of controlling rod position detector signal parameter adjustment, characterized by, The method comprises the following steps: During the movement of the control rod, the induced voltage data of each detection coil in the control rod position detector corresponding to the control rod is collected, and a corresponding induced voltage curve is generated according to the induced voltage data; The induced voltage curve corresponding to each detection coil is subjected to a sliding average processing to obtain a smooth induced voltage curve corresponding to each detection coil; The smooth induced voltage curve corresponding to each detection coil is subjected to a differential processing to obtain an induced voltage derivative curve corresponding to each detection coil; A plurality of control rod position mutation points are determined on each induced voltage derivative curve according to a preset derivative threshold, including: a plurality of mutation data points with a derivative absolute value greater than the derivative threshold are identified on each induced voltage derivative curve based on the derivative threshold; The time point corresponding to each mutation data point on the induced voltage derivative curve of each detection coil is determined as the control rod position mutation point; A plurality of groups of coil voltage values are determined on the corresponding induced voltage curve according to the plurality of control rod position mutation points, and the coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the plurality of groups of coil voltage values; The coil voltage threshold of each detection coil at each characteristic rod position is compared with a preset standard coil voltage threshold; When the deviation of the coil voltage threshold of any detection coil at any characteristic rod position from the standard coil voltage threshold exceeds a preset threshold range, the standard coil voltage threshold is calibrated according to the actual coil voltage threshold of each detection coil at each characteristic rod position to obtain a calibrated standard coil voltage threshold; The calibrated standard coil voltage threshold is updated as the coil voltage threshold parameter of the control rod position detector.

2. The method of claim 1, wherein, The induced voltage curve corresponding to each detection coil is subjected to a sliding average processing to obtain a smooth induced voltage curve corresponding to each detection coil, which comprises the following steps: A sliding average window with a preset width is obtained, and the center point of the sliding average window is aligned with each data point of the induced voltage curve in turn; At each alignment position, the arithmetic mean value of all data points in the sliding average window is calculated, and the data point at the alignment position is updated as the arithmetic mean value; All updated data points are connected to obtain the smooth induced voltage curve.

3. The method of claim 1, wherein, The plurality of groups of coil voltage values are determined on the corresponding induced voltage curve according to the plurality of control rod position mutation points, and the coil voltage threshold of each detection coil at each characteristic rod position is calculated according to the plurality of groups of coil voltage values, which comprises the following steps: Based on the plurality of control rod position mutation points, each induced voltage curve is divided into a plurality of characteristic rod positions; A plurality of groups of coil voltage values are collected at each characteristic rod position, and the plurality of groups of coil voltage values in each characteristic rod position are subjected to an arithmetic average to obtain an average voltage value in each characteristic rod position; The average voltage value in each characteristic rod position is determined as the coil voltage threshold of the corresponding detection coil at the characteristic rod position.

4. The method of claim 1, wherein, The control rod is driven by a control rod drive device, and moves in the rod position detector. For a first detection coil close to the control rod drive device in the rod position detector, after performing a sliding average processing on an induced voltage curve formed by the induced voltage data corresponding to each detection coil, a smooth induced voltage curve corresponding to each detection coil is obtained, and the method further comprises: Identifying on the smooth induced voltage curve corresponding to the first detection coil through a preset width sliding search window to obtain a plurality of local maximum points; Removing abnormal points in the plurality of local maximum points through a preset maximum value threshold to obtain a plurality of rod position feature points; Determining a plurality of local peak maximum voltage values and a plurality of local valley maximum voltage values on the induced voltage curve corresponding to the first detection coil; Calculating a coil voltage threshold corresponding to each rod position feature point of the first detection coil according to the plurality of local peak maximum voltage values and the plurality of local valley maximum voltage values.

5. The method of claim 4, wherein, The removing of the abnormal points in the plurality of local maximum points through the preset maximum value threshold to obtain the plurality of rod position feature points comprises: For each local maximum value, when the local maximum value is less than or equal to the maximum value threshold, the local maximum value is determined as the rod position feature point; When the local maximum value is greater than the maximum value threshold, the local maximum value is determined as an abnormal point and is removed from the plurality of local maximum points.

6. The method of claim 4, wherein, The determining of the plurality of local peak maximum voltage values and the plurality of local valley maximum voltage values on the induced voltage curve corresponding to the first detection coil comprises: Determining the induced voltage of each rod position feature point as a local peak maximum voltage value, and searching for two nearest local minimum points on the induced voltage curve on the left and right sides of the local peak maximum voltage value, respectively; Determining the induced voltage of the local minimum point with a larger induced voltage among the two local minimum points as a local valley maximum voltage value.

7. The method of claim 6, wherein, The calculating of the coil voltage threshold corresponding to each rod position feature point of the first detection coil according to the plurality of local peak maximum voltage values and the plurality of local valley maximum voltage values comprises: Calculating a callback voltage value according to each local peak maximum voltage value and the corresponding local valley maximum voltage value; Calculating the coil voltage threshold corresponding to each rod position feature point of the first detection coil based on the callback voltage value.

8. A control rod position detector signal parameter adjustment system, characterized by, A control rod rod position detector signal parameter adjustment method is implemented, and the method comprises A rod position measurement cabinet is used to collect induced voltage data of each detection coil in a rod position detector corresponding to a control rod during movement of the control rod; A recorder is connected to the rod position measurement cabinet through signal collection wiring, and is used to record and store the induced voltage data. The host computer is configured to import the induced voltage data from the recorder, generate corresponding induced voltage curves based on the imported induced voltage data, perform a sliding average process on the induced voltage curves to obtain smoothed induced voltage curves, perform a differential process on the smoothed induced voltage curves to obtain induced voltage derivative curves, determine a plurality of control rod position mutation points on each induced voltage derivative curve based on a preset derivative threshold, determine a plurality of groups of coil voltage values on the corresponding induced voltage curves based on the plurality of control rod position mutation points, and calculate a coil voltage threshold of each detection coil at each characteristic rod position.

9. A control rod position detector signal parameter adjustment device characterized by comprising: Comprise: The acquisition module is configured to acquire induced voltage data of each detection coil in the control rod position detector during movement of the control rod, and generate corresponding induced voltage curves based on the induced voltage data; The sliding average module is configured to perform a sliding average process on the induced voltage curve corresponding to each detection coil to obtain a smoothed induced voltage curve corresponding to each detection coil; The differential module is configured to perform a differential process on the smoothed induced voltage curve corresponding to each detection coil to obtain an induced voltage derivative curve corresponding to each detection coil; The identification module is configured to determine a plurality of control rod position mutation points on each induced voltage derivative curve based on a preset derivative threshold, including: identifying a plurality of mutation data points with a derivative absolute value greater than the derivative threshold on each induced voltage derivative curve based on the derivative threshold; and determining a time point corresponding to each mutation data point on the induced voltage derivative curve of each detection coil as the control rod position mutation point; The calculation module is configured to determine a plurality of groups of coil voltage values on the corresponding induced voltage curves based on the plurality of control rod position mutation points, calculate a coil voltage threshold of each detection coil at each characteristic rod position based on the plurality of groups of coil voltage values, and compare the coil voltage threshold of each detection coil at each characteristic rod position with a preset standard coil voltage threshold; when the deviation of the coil voltage threshold of any detection coil at any characteristic rod position from the standard coil voltage threshold exceeds a preset threshold range, calibrating the standard coil voltage threshold based on the actual coil voltage threshold of each detection coil at each characteristic rod position to obtain a calibrated standard coil voltage threshold; and updating the calibrated standard coil voltage threshold as a coil voltage threshold parameter of the control rod position detector.

10. An electronic device, comprising: Comprise: The memory stores a computer program, and the processor executes the computer program to implement the control rod position detector signal parameter adjustment method of any one of claims 1 to 7.

11. A computer readable storage medium, characterized in that, The storage medium stores a program, and the program is executed by the processor to implement the control rod position detector signal parameter adjustment method of any one of claims 1 to 7.

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