Dredger personnel work management method

Abstract

The invention relates to a dredger personnel work management method. The method comprises the following steps: collecting the current depth and slurry concentration of a sedimentation tank by using a depth metering sensor and a slurry concentration sensor; calibrating the current depth and slurry concentration of the sedimentation tank to obtain the calibrated depth and slurry concentration; setting a target dredging depth and a slurry concentration standard; and making a work plan according to the set target dredging depth and slurry concentration standard and the calibrated depth and slurry concentration of the current sedimentation tank. According to the invention, the depth metering sensor and the slurry concentration sensor are used to obtain the depth and slurry concentration of the sedimentation tank in real time, so that a worker can make a response quickly and conveniently, a work plan is optimized, and operation delay caused by information lag is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dredging vessels, and in particular to a work management method for dredging vessel personnel. Background Art

[0002] Dredgers, as important equipment for desilting and dredging, are widely used in the maintenance and development of water bodies such as ports, rivers, and lakes. With the increasing awareness of water development and environmental protection, the work efficiency and personnel management of dredgers have become key factors in improving operational effectiveness and safety. Summary of the invention

[0003] In order to solve the above problems, an embodiment of the present invention aims to provide a work management method for dredging ship personnel.

[0004] A dredging crew work management method, comprising:

[0005] Step 1: Use the depth metering sensor and mud concentration sensor to collect the current sedimentation tank depth and mud concentration;

[0006] Step 2: Calibrate the depth and mud concentration of the current sedimentation tank to obtain the calibrated depth and mud concentration;

[0007] Step 3: Set target dredging depth and mud concentration standards;

[0008] Step 4: Develop a work plan based on the target dredging depth and mud concentration standards and the current calibrated depth and mud concentration of the sedimentation tank.

[0009] Preferably, the step 2: calibrating the depth and mud concentration of the current sedimentation tank to obtain the calibrated depth and mud concentration includes:

[0010] Obtain the depth signal and mud concentration signal of the sensor;

[0011] Performing wavelet decomposition on the depth signal and the mud concentration signal to obtain wavelet coefficients at corresponding decomposition scales;

[0012] Determine the threshold value according to the wavelet coefficient;

[0013] When the wavelet coefficient is greater than or equal to the threshold, the wavelet coefficient is processed by a first calibration processing function to generate a processed wavelet coefficient;

[0014] When the wavelet coefficient is less than the threshold, the wavelet coefficient is processed by a second calibration processing function to generate a processed wavelet coefficient;

[0015] The processed wavelet coefficients are reconstructed to obtain the calibrated depth and mud concentration.

[0016] Preferably, determining the threshold value according to the wavelet coefficient includes:

[0017] Using the formula:

[0018]

[0019] Determine the threshold; where λ is the threshold, δ is the standard deviation of Gaussian noise, N is the signal length, z is the set coefficient, and p is the decomposition scale.

[0020] Preferably, the first calibration processing function is:

[0021]

[0022] in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

[0023] Preferably, the second calibration processing function is:

[0024]

[0025] in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

[0026] Preferably, it also includes:

[0027] The signal-to-noise ratio calculation formula is used to evaluate the reconstructed wavelet coefficients to form a quality coefficient; the signal-to-noise ratio calculation formula is:

[0028]

[0029] Among them, s(n) represents the original signal, represents the reconstructed signal, n represents the sampling point number, N represents the sampling length, and SNR represents the quality coefficient;

[0030] The adjustable parameters are continuously changed to keep the quality factor within the set range to form the calibrated depth and mud concentration.

[0031] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0032] The present invention relates to a work management method for dredger personnel. Compared with the prior art, the present invention uses a depth metering sensor and a mud concentration sensor to obtain the depth and mud concentration of a sedimentation tank in real time, which can facilitate the staff to respond quickly, optimize the work plan, and reduce operation delays caused by information lag.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A flow chart of a dredging vessel personnel work management method provided by the present invention;

[0036] Figure 2 The first stage management flow chart provided by the present invention;

[0037] Figure 3 The second stage management flow chart provided by the present invention;

[0038] Figure 4 A flow chart of reward level determination provided by the present invention;

[0039] Figure 5 A flow chart for determining rewards for affiliated personnel provided by the present invention. DETAILED DESCRIPTION

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] See also Figure 1 , a dredging crew work management method, comprising:

[0044] Step 1: Use the depth metering sensor and mud concentration sensor to collect the current sedimentation tank depth and mud concentration;

[0045] Step 2: Calibrate the depth and mud concentration of the current sedimentation tank to obtain the calibrated depth and mud concentration;

[0046] Furthermore, step 2 includes:

[0047] Step 2.1: Obtain the depth signal and mud concentration signal of the sensor;

[0048] Step 2.2: performing wavelet decomposition on the depth signal and the mud concentration signal to obtain wavelet coefficients at corresponding decomposition scales;

[0049] Step 2.3: Determine the threshold value according to the wavelet coefficient; the threshold value determination formula is:

[0050]

[0051] Determine the threshold; where λ is the threshold, δ is the standard deviation of Gaussian noise, N is the signal length, z is the set coefficient, and p is the decomposition scale.

[0052] Step 2.4: When the wavelet coefficient is greater than or equal to the threshold, the wavelet coefficient is processed using a first calibration processing function to generate processed wavelet coefficients; wherein the first calibration processing function is:

[0053]

[0054] in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

[0055] Step 2.5: When the wavelet coefficient is less than the threshold, the wavelet coefficient is processed by a second calibration processing function to generate processed wavelet coefficients; wherein the second calibration processing function is:

[0056]

[0057] in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

[0058] Step 2.6: Reconstruct the processed wavelet coefficients to obtain the calibrated depth and mud concentration.

[0059] It should be noted that step 2.6 also includes:

[0060] The signal-to-noise ratio calculation formula is used to evaluate the reconstructed wavelet coefficients to form a quality coefficient; the signal-to-noise ratio calculation formula is:

[0061]

[0062] Among them, s(n) represents the original signal, represents the reconstructed signal, n represents the sampling point number, N represents the sampling length, and SNR represents the quality coefficient;

[0063] The adjustable parameters are continuously changed to keep the quality factor within the set range to form the calibrated depth and mud concentration.

[0064] The present invention can adjust the shrinkage degree of the threshold processing function by changing the value of the adjustable parameter, so that the threshold processing function can be transformed between a conventional hard threshold function and a soft threshold function. In this way, different processing methods can be selected according to different processing requirements. For example, when the noise level is high, the soft threshold function can be used to better reduce the impact of noise on the signal, while when the signal is strong or the noise is small, the hard threshold function can be used to retain more original signal features.

[0065] Step 3: Set target dredging depth and mud concentration standards;

[0066] Step 4: Develop a work plan based on the target dredging depth and mud concentration standards and the current calibrated depth and mud concentration of the sedimentation tank.

[0067] See also Figure 2-4 The following is a further description of the method for formulating a work plan in conjunction with a specific embodiment of the present invention:

[0068] 1. Calibrate the dredger depth meter and mud concentration meter, clarify the instrument range and accuracy, and ensure that the measured data is true and valid. After calibration, the maximum range of the dredger depth meter is 9m, with an accuracy of 0.01m; the maximum range of the mud concentration meter is 100%, with an accuracy of 0.1%;

[0069] 2. Set the target value for the foundation depth of the sedimentation tank, i.e. 2.7m for the 1# and 2# sedimentation tanks; 3.5m for the 4# sedimentation tank; and 3.7m for the 5# sedimentation tank. After comparing the actual depth of the sedimentation tanks at the beginning of the year, the depth target will be broken down into monthly tasks to clarify the monthly task target value.

[0070] 3. Based on the set monthly task target value and combined with the working efficiency of the dredger, a higher dredging depth is set as the reward standard, and different gears are set up to formulate a graded reward and assessment mechanism. At the same time, the original assessment cycle is shortened to monthly assessment, and the reward and punishment standards for operators and liaison personnel are clarified.

[0071] 4. Management personnel regularly conduct statistical analysis on depth data and mud concentration data every month, calculate actual monthly excavation depth data, compare it with the set target value, and determine the rewards and assessments for corresponding personnel.

[0072] Second, implementation plan

[0073] 1. In the initial stage, that is, from the end of April to the beginning of May each year, professional technicians calibrate the depth measuring instruments and mud concentration meters of the dredger to ensure that the instrument measurement data is accurate and valid; after completing the instrument calibration, the management personnel use the instrument to measure the actual average depth of the four sedimentation tanks as the benchmark value.

[0074] 2. In the first stage, from early May to early August each year, the basic dredging depth of each pool is used as the target value, which is decomposed monthly (3 months) after being subtracted from the actual depth measured in each pool. The monthly reward level dredging depth requirements for the first stage are as follows: Level 1: 1# pool: above 0.22m; 2# pool: above 0.17m; 4# pool: above 0.07m; 5# pool: above 0.23m; Level 2: 1# pool: 0.2m-0.22m; 2# pool: 0.15m-0 .17m; 4# pool: 0.05m-0.07m; 5# pool: 0.21m-0.23m; three levels: 1# pool: 0.18m-0.2m; 2# pool: 0.13m-0.15m; 4# pool: 0.03m-0.05m; 5# pool: 0.19m-0.21m; if the dredging depth requirement of the corresponding reward level is met each month, the reward will be given according to the corresponding level according to the dredging depth; for ships that do not meet the minimum dredging depth requirement each month, an assessment will be given. When the monthly average depth meets the above requirements, the target depth must also be met after the first phase of dredging, that is, the average depth of 1# and 2# sedimentation pools is above 2.7m, the average depth of 4# sedimentation pool is above 2.8m; the average depth of 5# sedimentation pool is above 3.6m. If the target depth is not reached on time, the reward for the ship for that month will be cancelled, and the full assessment will be conducted according to the previous reward amount.

[0075] 3. The second stage, from early August to early November, takes the average depth of each pool measured at the end of the first stage as the benchmark value, and the digging depth requirements for each monthly reward level are as follows: Level 1: the average depth measured each month increases by more than 0.2m compared with the previous month; Level 2: the average depth measured each month increases by 0.1-0.2m compared with the previous month; Level 3: the average depth measured each month increases by 0.05-0.1m compared with the previous month. The final measured depth must reach the target depth.

[0076] 4. The reward and assessment principles for the coordinators are as follows: when both of the coordinating ships meet the first-level reward standard, the corresponding coordinator will be given a higher reward; if the two ships only meet the second or third-level reward requirements, the coordinator will be given a lower reward; if one of the coordinating ships fails to meet the minimum dredging requirement for the month, the coordinator will not be rewarded; if both of the coordinating ships fail to meet the minimum dredging requirement for the month, the coordinator will be assessed.

[0077] The present invention uses a depth metering sensor and a mud concentration sensor to obtain the depth and mud concentration of the sedimentation tank in real time, which can facilitate workers to respond quickly, optimize work plans, and reduce operation delays caused by information lag.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A dredging vessel personnel work management method, characterized in that: include: Step 1: Use the depth metering sensor and mud concentration sensor to collect the current sedimentation tank depth and mud concentration; Step 2: Calibrate the depth and mud concentration of the current sedimentation tank to obtain the calibrated depth and mud concentration; Step 3: Set target dredging depth and mud concentration standards; Step 4: Develop a work plan based on the target dredging depth and mud concentration standards and the current calibrated depth and mud concentration of the sedimentation tank.

2. A dredging vessel personnel work management method according to claim 1, characterized in that: The step 2: calibrating the depth and mud concentration of the current sedimentation tank to obtain the calibrated depth and mud concentration, includes: Obtain the depth signal and mud concentration signal of the sensor; Performing wavelet decomposition on the depth signal and the mud concentration signal to obtain wavelet coefficients at corresponding decomposition scales; Determine the threshold value according to the wavelet coefficient; When the wavelet coefficient is greater than or equal to the threshold, the wavelet coefficient is processed by a first calibration processing function to generate a processed wavelet coefficient; When the wavelet coefficient is less than the threshold, the wavelet coefficient is processed by a second calibration processing function to generate a processed wavelet coefficient; The processed wavelet coefficients are reconstructed to obtain the calibrated depth and mud concentration.

3. A dredging vessel personnel work management method according to claim 2, characterized in that: Determine the threshold value based on the wavelet coefficients, including: Using the formula: Determine the threshold; where λ is the threshold, δ is the standard deviation of Gaussian noise, N is the signal length, z is the set coefficient, and p is the decomposition scale.

4. A dredging vessel personnel work management method according to claim 3, characterized in that: The first calibration processing function is: in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

5. A dredging vessel personnel work management method according to claim 4, characterized in that: The second calibration processing function is: in, represents the processed wavelet coefficient, sgn represents the sign function, λ represents the threshold, ω j represents the i-th original wavelet coefficient, a represents the first adjustable parameter, b represents the second adjustable parameter, and α represents the third adjustable parameter.

6. A dredging vessel personnel work management method according to claim 5, characterized in that: Also includes: The signal-to-noise ratio calculation formula is used to evaluate the reconstructed wavelet coefficients to form a quality coefficient; the signal-to-noise ratio calculation formula is: Among them, s(n) represents the original signal, represents the reconstructed signal, n represents the sampling point number, N represents the sampling length, and SNR represents the quality coefficient; The adjustable parameters are continuously changed to keep the quality factor within the set range to form the calibrated depth and mud concentration.

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