Plunger pump sensor layout optimization method and device, electronic equipment and storage medium

Abstract

The invention provides a plunger pump sensor layout optimization method and device, electronic equipment and a storage medium, sensor layout optimization initial conditions are determined according to the structure of a reciprocating plunger pump, and the sensor layout optimization initial conditions comprise the positions and the number of initial sensor layout points; an objective function is constructed, and the objective function aims at completing comprehensive state monitoring of the reciprocating plunger pump through the fewest sensors; constructing constraint conditions based on the effective characterization index, wherein the constraint conditions comprise a signal overlapping rate constraint and an effective characterization index threshold constraint; solving the objective function on the basis of the sensor layout optimization initial condition according to the signal overlapping rate constraint and the effective representation index threshold constraint, obtaining the final position and number of sensor layout points, and quantifying the sensor state sensing effect through the effective representation index. An optimization scheme and an optimization basis are provided for the sensor layout, and the rationality of the sensor layout is improved.

Description

Technical Field

[0001] The present invention relates to the field of sensor layout technology, and in particular to a plunger pump sensor layout optimization method, device, electronic equipment and storage medium. Background Art

[0002] The reciprocating piston pump is the core power equipment of the liquid supply system of the fully mechanized working face of a coal mine. Using sensors to monitor its health status for equipment management is an important part of the intelligent construction of coal mines. Real-time health status monitoring and early warning of reciprocating piston pumps are of great significance to coal mine production. Reciprocating piston pumps can be divided into two major parts: the hydraulic end and the power end. The hydraulic end may have failures such as damage to the suction and discharge valve assembly and plunger explosion, and the power end may have failures such as eccentric wear of the slider, breakage of the connecting rod, bearing damage, and gear damage. For the failure of the hydraulic end, a vibration sensor is added for fault monitoring to achieve the health management of the reciprocating piston pump. However, the reciprocating piston pump has a complex structure, including multiple reciprocating mechanisms and rotating mechanisms. The traditional monitoring sensor layout method either arranges a sensor at the hydraulic end and the power end, or arranges sensors according to the key components of the reciprocating piston pump, with one sensor for each key component. The former arranges too few sensors and cannot fully monitor all the key components of the reciprocating piston pump, and can only roughly judge the health status of the components. The latter arranges too many sensors, which is not only expensive, but also causes unnecessary waste of resources. Summary of the invention

[0003] The present invention provides a plunger pump sensor layout optimization method, device, electronic equipment and storage medium, which are used to solve the defects of unreasonable layout of monitoring sensors during traditional plunger pump fault monitoring, resulting in inability to fully monitor or waste of resources.

[0004] The present invention provides a plunger pump sensor layout optimization method, comprising: Determine the initial conditions for sensor layout optimization according to the structure of the reciprocating piston pump, wherein the initial conditions for sensor layout optimization include the position and number of initial sensor layout points; Constructing an objective function, wherein the objective function aims to complete comprehensive condition monitoring of a reciprocating piston pump with a minimum number of sensors; Constructing constraint conditions based on effective characterization indicators, wherein the constraint conditions include signal overlap rate constraint and effective characterization indicator threshold constraint; The objective function is solved based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points.

[0005] According to the plunger pump sensor layout optimization method provided by the present invention, the effective characterization index acquisition method includes: A vibration excitation is given to any initial sensor layout point as an excitation occurrence location, and an excitation response corresponding to the vibration excitation is received by the sensor; extracting statistical features and waveform features from the stimulus response; An effective characterization index is constructed by combining the statistical features and waveform features.

[0006] According to the plunger pump sensor layout optimization method provided by the present invention, the signal overlap rate constraint includes: determining a time delay and a signal length of the stimulus response; intercepting a judgment signal according to the time delay and the signal length; A signal overlap ratio is calculated based on the judgment signal, and the signal overlap ratios between different target stimulus responses meet a preset condition.

[0007] According to the plunger pump sensor layout optimization method provided by the present invention, the determining of the time delay and signal length of the excitation response comprises: Comparing the difference between the determination signal at the place where the stimulus is generated and the place where the stimulus is received, and determining the delay time of the stimulus response; And, determining the length of the excitation response according to the complete signal form of the vibration excitation.

[0008] According to the plunger pump sensor layout optimization method provided by the present invention, the effective characterization index threshold constraint includes: Setting an effective characterization index threshold, where the effective characterization index threshold is used to characterize whether the state monitoring of the coverage position by the sensor installed at the current position can meet the requirement of sensing faults; When the effective characterization index of the judgment signal is higher than the effective characterization index threshold, it is determined that the status monitoring of the coverage position by the sensor installed at the current position can meet the requirements of fault perception, and the sensor needs to be installed.

[0009] According to the plunger pump sensor layout optimization method provided by the present invention, the objective function construction includes: With the minimum number of sensors as the goal, the objective function is constructed as The optimization problem can be described as follows: in, Indicates whether the i-th sensor is installed, N is the possible number of sensors installed, is the effective characterization index of the i-th sensor, To effectively characterize the index threshold, is the signal overlap rate of the i-th sensor, is the signal overlap rate threshold.

[0010] According to the plunger pump sensor layout optimization method provided by the present invention, the objective function is solved according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points, including: Encode the initial layout point of each sensor and generate a vector as the population; Performing selection, crossover and mutation operations on the population, including selecting layout points with higher fitness from the current population as the basis for the next generation; Randomly select two layout points and exchange their position information to generate new individuals; Randomly change the positions of certain layout points with a certain probability to introduce new changes; The selection, crossover and mutation operations are repeated until the preset maximum number of iterations is reached, and the final position and number of sensor layout points are output.

[0011] The present invention also provides a plunger pump sensor layout optimization device, comprising: A determination module, used to determine the initial conditions for sensor layout optimization according to the structure of the reciprocating piston pump, wherein the initial conditions for sensor layout optimization include the positions and the number of initial sensor layout points; A first building module is used to build an objective function, wherein the objective function aims to complete comprehensive state monitoring of a reciprocating piston pump with a minimum number of sensors; A second construction module is used to construct a constraint condition based on the effective characterization index, wherein the constraint condition includes a signal overlap rate constraint and an effective characterization index threshold constraint; The solution module is used to solve the objective function based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the plunger pump sensor layout optimization method as described in any one of the above items is implemented.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements any of the above-mentioned methods for optimizing the layout of a plunger pump sensor.

[0014] The present invention provides a plunger pump sensor layout optimization method, device, electronic device and storage medium. The method determines the initial conditions for sensor layout optimization according to the structure of a reciprocating plunger pump, wherein the initial conditions for sensor layout optimization include the positions and number of initial sensor layout points; constructs an objective function, wherein the objective function aims to complete comprehensive state monitoring of a reciprocating plunger pump with a minimum of sensors; constructs constraint conditions based on effective characterization indicators, wherein the constraint conditions include signal overlap rate constraints and effective characterization indicator threshold constraints; solves the objective function based on the initial conditions for sensor layout optimization according to the signal overlap rate constraints and the effective characterization indicator threshold constraints, obtains the final positions and number of sensor layout points, quantifies the sensor state perception effect through effective characterization indicators, provides an optimization scheme and optimization basis for sensor layout, and improves the rationality of sensor layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0016] Figure 1 It is a flow chart of a plunger pump sensor layout optimization method provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of a reciprocating plunger pump provided by an embodiment of the present invention; Figure 3 It is a functional structure diagram of a plunger pump sensor layout optimization device provided by an embodiment of the present invention; Figure 4 It is a functional structure diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Figure 1 A flowchart of a plunger pump sensor layout optimization method provided by an embodiment of the present invention, such as Figure 1 As shown, the plunger pump sensor layout optimization method provided by the embodiment of the present invention includes: Step 101, determining the initial conditions for optimizing the sensor layout according to the structure of the reciprocating piston pump, wherein the initial conditions for optimizing the sensor layout include the positions and the number of initial sensor layout points; The structure of a reciprocating piston pump is as follows Figure 2 As shown, the reference numerals are as follows: 1 - suction chamber sealing plate; 2 - pump head body; 3 - suction valve assembly; 4 - spacer sleeve; 5 - discharge valve assembly; 6 - hydraulic conversion housing; 7 - middle box; 8 - plunger; 9 - slider; 10 - crankcase; 11 - gear.

[0019] Taking the five-plunger reciprocating piston pump as an example, according to the structural characteristics of the reciprocating piston pump, it can be divided into the hydraulic end and the power end. Common mechanical parts of the reciprocating piston pump include: suction valve assembly, discharge valve assembly, plunger, slider, gear, bearing, shaft, etc. The hydraulic end may experience failures such as damage to the suction and discharge valve assembly and plunger explosion, and the power end may experience failures such as eccentric wear of the slider, breakage of the connecting rod, bearing damage, and gear damage. The five-plunger reciprocating piston pump has five suction and discharge valve groups, which are divided into two parts, the upper part is the discharge valve assembly, and the lower part is the suction valve assembly. Based on the principle of one-to-one correspondence between sensors and key components, the initial sensor layout plan is determined to be that 10 unidirectional sensors need to be deployed at the hydraulic end.

[0020] The five-plunger reciprocating plunger pump has five sets of plungers arranged side by side, corresponding to the suction and discharge valve components. The reciprocating motion of the plunger may cause eccentric wear during operation, and the material is mostly ceramic, which may burst once worn to a certain extent. Therefore, the initial sensor layout plan is to install sensors parallel to the plunger on the hydraulic end side, a total of 5 sensors.

[0021] The crankcase contains the input shaft and the crankshaft, and the shaft is supported by bearings, with a support bearing at each end of the shaft. Therefore, the initial sensor layout plan is determined to require at least 4 unidirectional vibration sensors for condition monitoring of the crankcase. If there is a support bearing in the middle of the input shaft or crankshaft, the number of sensors will increase correspondingly to the number of bearings.

[0022] The vibration sensor is usually installed by adsorption or magnetic attraction, and is installed on the surface of the external structure of the equipment. Taking the installation of the hydraulic end drain valve sensor as an example, since the sensor corresponds to five sets of drain valves installed side by side, the vibration signal sensed by the sensor is the superposition of the excitation impact of multiple components.

[0023] Step 102, constructing an objective function, wherein the objective function aims to complete comprehensive state monitoring of the reciprocating piston pump with the least number of sensors; Step 103: constructing constraint conditions based on the effective characterization index, wherein the constraint conditions include a signal overlap rate constraint and an effective characterization index threshold constraint; Step 104 : solving the objective function based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final positions and number of sensor layout points.

[0024] The traditional monitoring sensor layout method is to either place a sensor at the hydraulic end and the power end, or place sensors according to the key components of the reciprocating piston pump, with one sensor for each key component. The former has too few sensors and cannot fully monitor all the key components of the reciprocating piston pump, and can only roughly judge the health status of the components. The latter places too many sensors, which is not only expensive, but also causes unnecessary waste of resources.

[0025] The plunger pump sensor layout optimization method provided by the embodiment of the present invention determines the initial conditions for sensor layout optimization according to the structure of the reciprocating plunger pump, and the initial conditions for sensor layout optimization include the positions and the number of initial sensor layout points; constructs an objective function, and the objective function aims to complete the comprehensive state monitoring of the reciprocating plunger pump with the least sensors; constructs constraint conditions based on effective characterization indicators, and the constraint conditions include signal overlap rate constraints and effective characterization indicator threshold constraints; solves the objective function on the basis of the initial conditions for sensor layout optimization according to the signal overlap rate constraints and the effective characterization indicator threshold constraints, and obtains the final positions and the number of sensor layout points, and quantifies the sensor state perception effect through the effective characterization indicators, thereby providing an optimization scheme and optimization basis for the sensor layout, and improving the rationality of the sensor layout.

[0026] Based on any of the above embodiments, the method for obtaining effective characterization indicators includes: Step 201: taking any initial sensor layout point as the excitation location and giving a vibration excitation, and receiving an excitation response corresponding to the vibration excitation through the sensor; Step 202: extracting statistical features and waveform features from the stimulus response; Step 203: construct an effective characterization index by combining the statistical features and waveform features.

[0027] In the embodiment of the present invention, taking the measurement of a single set of suction and discharge valve sensor signals as an example, a sinusoidal vibration excitation is given at the suction valve, and the simulated excitation response is xs. A unidirectional vibration sensor is installed at the discharge valve to obtain the excitation response xm after transmission. A sensor signal perception effectiveness index is constructed to measure the characterization effect of the position where the sensor is not deployed.

[0028] In order to measure the signal characterization effect, the construction of the measurement index mainly combines the statistical characteristics and waveform characteristics of the signal and integrates them in a weighted manner. The measurement index EM that uses the measured signal position to characterize the simulated signal position s(m) The definition is shown in the following formula: Among them, S is the statistical feature, W is the waveform feature, the superscript S indicates the feature of the simulated stimulus response, the superscript m indicates the feature of the measured stimulus response, α is the weight of the statistical feature, β is the weight of the waveform feature, and x i It indicates the amplitude corresponding to the i-th data point in a stimulus response signal, and n indicates the number of data points contained in the stimulus response signal. When the two signals are completely consistent, the characterization effect measurement index is equal to 1. When the signal is attenuated, the index is less than 1, and the greater the attenuation, the smaller the index value. When a sensor is installed at a sensor layout point, the effective characterization index value of the sensor layout point defaults to 1.

[0029] Based on any of the foregoing embodiments, the signal overlap rate constraint includes: Step 301, determining the time delay and signal length of the stimulus response; In an embodiment of the present invention, determining the time delay and signal length of the stimulus response includes: Comparing the difference between the determination signal at the place where the stimulus is generated and the place where the stimulus is received, and determining the delay time of the stimulus response; And, determining the length of the excitation response according to the complete signal form of the vibration excitation.

[0030] Step 302: intercepting a judgment signal according to the time delay and the signal length; Step 303: Calculate the signal overlap rate based on the judgment signal, and the signal overlap rate between different target stimulus responses meets a preset condition.

[0031] In the embodiment of the present invention, the delay time of the signal response can be determined by comparing the difference between the excitation generating point and the receiving point. At the same time, the length of the signal needs to be determined according to the complete form of the excitation signal. After the above two conditions are met, the mutual characterization effect between different sensor layout points is established.

[0032] For other layout points where sensors are not installed, it is necessary to use the sensor signals at other locations to characterize the effectiveness. Due to the influence of structure and distance, the characterization effect of the signal is different. Different sensors have different degrees of effectiveness for the same point. The maximum value of the effectiveness characterization index can be used as the effective characterization index of the layout point where sensors are not deployed.

[0033] The signal overlap rate between different target stimulus responses must meet certain conditions. This constraint has two meanings. On the one hand, it requires that the signal feature fragment contains the required complete stimulus response. On the other hand, it requires that the stimulus response does not overlap with other stimulus responses. The sensors that have not been eliminated can sense the vibration signals of key components that are not installed, and the signal components of the corresponding impact do not overlap in the same signal to ensure the purity of the signal characteristics.

[0034] For the signal segment used to calculate the effective characterization index, assuming that the signal segment length of the target stimulus response is t, the overlap rate of the target stimulus response in the measured signal and other stimulus responses can be calculated as follows: In the formula, o represents the signal overlap rate index, Δt represents the duration of the overlapping signal, t represents the duration of the target stimulus response, and U o Indicates the minimum value that the overlap ratio indicator needs to meet.

[0035] Based on any of the above embodiments, the effective characterization index threshold constraint includes: Step 401: Setting an effective characterization index threshold, where the effective characterization index threshold is used to characterize whether the state monitoring of the coverage position by the sensor installed at the current position can meet the requirement of sensing faults; Step 402: When the effective characterization index of the judgment signal is higher than the effective characterization index threshold, it is determined that the state monitoring of the coverage position by the sensor installed at the current position can meet the requirement of sensing faults, and the sensor needs to be installed.

[0036] In the embodiment of the present invention, the set threshold of the effective characterization index indicates that the status monitoring of a certain location can perceive the early information of the fault, warn the fault, and meet the health management requirements. Therefore, a threshold is set. When the signal characterization effect is lower than the threshold, it means that the signal characterization effect is unsatisfactory and cannot meet the requirements of discarding the sensor. It is necessary to increase the installation of actual sensors. For any possible sensor layout point, its maximum effective characterization index must be greater than the set threshold: in, is the effective characterization indicator threshold.

[0037] Based on any of the above embodiments, constructing the objective function includes: With the minimum number of sensors as the goal, the objective function is constructed as The optimization problem can be described as follows: in, Indicates whether the i-th sensor is installed, N is the possible number of sensors installed, is the effective characterization index of the i-th sensor, To effectively characterize the index threshold, is the signal overlap rate of the i-th sensor, is the signal overlap rate threshold.

[0038] In the embodiment of the present invention, possible sensor layout points are numbered sequentially, Si represents whether the i-th sensor is installed, and the number of possible sensor installation points is N. When Si is equal to 1, it means that the sensor is installed at this position; when Si is equal to 0, it means that the sensor is not installed at this position. With the minimum number of sensors as the goal, the sensor layout is constrained based on the similarity of sensor signals, the sensor layout is optimized, and the comprehensive state monitoring of the reciprocating piston pump is achieved with the minimum number of sensors.

[0039] Based on any of the above embodiments, solving the objective function according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points includes: Step 501: Encode the initial layout point of each sensor and generate a vector as a population; Step 502: performing selection, crossover and mutation operations on the population, including selecting layout points with higher fitness from the current population as the basis for the next generation; Step 503: randomly select two layout points and exchange their position information to generate new individuals; Step 504: randomly change the positions of certain layout points with a certain probability to introduce new changes; Step 505: Repeat the selection, crossover and mutation operations until a preset maximum number of iterations is reached, and output the final position and number of sensor layout points.

[0040] In the embodiment of the present invention, the possible sensor layout points are combined into a vector, and the established optimization problem is solved using a genetic algorithm to obtain a final sensor layout solution. It should be noted that the present application is not limited to the use of a genetic algorithm, and other optimization algorithms can also obtain the final sensor layout solution.

[0041] The plunger pump sensor layout optimization method provided in the embodiment of the present invention designs a characterization index for measuring the effectiveness of the sensor, refines the sensor layout problem into a mathematical problem, constrains the sensor optimization problem from two aspects of signal overlap and effectiveness characterization, constructs a sensor layout optimization model, transforms the sensor layout optimization problem into mathematical modeling and optimization solution, uses an optimization algorithm to solve the best sensor layout solution, provides an optimization method for the sensor layout, and improves the rationality of the layout.

[0042] The plunger pump sensor layout optimization device provided by the present invention is described below. The plunger pump sensor layout optimization device described below and the plunger pump sensor layout optimization method described above can be referenced to each other.

[0043] Figure 3 A schematic diagram of the structure of a plunger pump sensor layout optimization device provided by an embodiment of the present invention, such as Figure 3 As shown, the plunger pump sensor layout optimization device provided by the embodiment of the present invention includes: A determination module 301 is used to determine the initial conditions for sensor layout optimization according to the structure of the reciprocating piston pump, wherein the initial conditions for sensor layout optimization include the positions and the number of initial sensor layout points; A first construction module 302 is used to construct an objective function, wherein the objective function aims to complete comprehensive state monitoring of a reciprocating piston pump with a minimum number of sensors; A second construction module 303 is used to construct a constraint condition based on the effective characterization index, wherein the constraint condition includes a signal overlap rate constraint and an effective characterization index threshold constraint; The solving module 304 is used to solve the objective function based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points.

[0044] The plunger pump sensor layout optimization device provided by the embodiment of the present invention determines the initial conditions for sensor layout optimization according to the structure of the reciprocating plunger pump, and the initial conditions for sensor layout optimization include the positions and number of initial sensor layout points; constructs an objective function, and the objective function aims to complete the comprehensive state monitoring of the reciprocating plunger pump with the least sensors; constructs constraint conditions based on effective characterization indicators, and the constraint conditions include signal overlap rate constraints and effective characterization indicator threshold constraints; solves the objective function on the basis of the initial conditions for sensor layout optimization according to the signal overlap rate constraints and the effective characterization indicator threshold constraints, and obtains the final positions and number of sensor layout points, quantifies the sensor state perception effect through the effective characterization indicators, provides an optimization plan and optimization basis for the sensor layout, and improves the rationality of the sensor layout.

[0045] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The memory 430 includes a computer program, an operating system and acquired data, and the processor 410 can call the logic instructions in the memory 430 to execute the plunger pump sensor layout optimization method, the method comprising: determining the sensor layout optimization initial conditions according to the structure of the reciprocating plunger pump, the sensor layout optimization initial conditions including the initial sensor layout point position and number; constructing an objective function, the objective function aims to complete the comprehensive state monitoring of the reciprocating plunger pump with the least sensors; constructing constraint conditions based on effective characterization indicators, the constraint conditions including signal overlap rate constraint and effective characterization indicator threshold constraint; solving the objective function based on the sensor layout optimization initial conditions according to the signal overlap rate constraint and the effective characterization indicator threshold constraint to obtain the final position and number of sensor layout points.

[0046] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0047] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the plunger pump sensor layout optimization method provided by the above-mentioned methods. The method includes: determining the initial conditions for sensor layout optimization based on the structure of the reciprocating plunger pump, and the initial conditions for sensor layout optimization include the initial sensor layout point position and number; constructing an objective function, and the objective function aims to complete the comprehensive state monitoring of the reciprocating plunger pump with the least sensors; constructing constraints based on effective characterization indicators, and the constraints include signal overlap rate constraints and effective characterization indicator threshold constraints; solving the objective function based on the initial conditions for sensor layout optimization according to the signal overlap rate constraints and the effective characterization indicator threshold constraints to obtain the final position and number of sensor layout points.

[0048] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0049] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plunger pump sensor layout optimization method, characterized in that: include: Determine the initial conditions for sensor layout optimization according to the structure of the reciprocating piston pump, wherein the initial conditions for sensor layout optimization include the position and number of initial sensor layout points; Constructing an objective function, wherein the objective function aims to complete comprehensive condition monitoring of a reciprocating piston pump with a minimum number of sensors; Constructing constraint conditions based on effective characterization indicators, wherein the constraint conditions include signal overlap rate constraint and effective characterization indicator threshold constraint; The objective function is solved based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points.

2. The plunger pump sensor layout optimization method according to claim 1, characterized in that: The effective characterization index acquisition method comprises: A vibration excitation is given to any initial sensor layout point as an excitation occurrence location, and an excitation response corresponding to the vibration excitation is received by the sensor; extracting statistical features and waveform features from the stimulus response; An effective characterization index is constructed by combining the statistical features and waveform features.

3. The plunger pump sensor layout optimization method according to claim 2, characterized in that: The signal overlap rate constraint includes: determining a time delay and a signal length of the stimulus response; intercepting a judgment signal according to the time delay and the signal length; A signal overlap ratio is calculated based on the judgment signal, and the signal overlap ratios between different target stimulus responses meet a preset condition.

4. The plunger pump sensor layout optimization method according to claim 3, characterized in that: Determining the time delay and signal length of the stimulus response comprises: Comparing the difference between the determination signal at the place where the stimulus is generated and the place where the stimulus is received, and determining the delay time of the stimulus response; And, determining the length of the excitation response according to the complete signal form of the vibration excitation.

5. The plunger pump sensor layout optimization method according to claim 3, characterized in that: The effective characterization index threshold constraints include: Setting an effective characterization index threshold, where the effective characterization index threshold is used to characterize whether the state monitoring of the coverage position by the sensor installed at the current position can meet the requirement of sensing faults; When the effective characterization index of the judgment signal is higher than the effective characterization index threshold, it is determined that the status monitoring of the coverage position by the sensor installed at the current position can meet the requirements of fault perception, and the sensor needs to be installed.

6. The plunger pump sensor layout optimization method according to claim 1, characterized in that: The constructing objective function comprises: With the minimum number of sensors as the goal, the objective function is constructed as The optimization problem can be described as follows: in, Indicates whether the i-th sensor is installed, N is the possible number of sensors installed, is the effective characterization index of the i-th sensor, To effectively characterize the index threshold, is the signal overlap rate of the i-th sensor, is the signal overlap rate threshold.

7. The plunger pump sensor layout optimization method according to claim 1, characterized in that: Solving the objective function according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points includes: Encode the initial layout point of each sensor and generate a vector as the population; Performing selection, crossover and mutation operations on the population, including selecting layout points with higher fitness from the current population as the basis for the next generation; Randomly select two layout points and exchange their position information to generate new individuals; Randomly change the positions of certain layout points with a certain probability to introduce new changes; The selection, crossover and mutation operations are repeated until the preset maximum number of iterations is reached, and the final position and number of sensor layout points are output.

8. A plunger pump sensor layout optimization device, characterized in that: include: A determination module, used to determine the initial conditions for sensor layout optimization according to the structure of the reciprocating piston pump, wherein the initial conditions for sensor layout optimization include the positions and the number of initial sensor layout points; A first building module is used to build an objective function, wherein the objective function aims to complete comprehensive state monitoring of a reciprocating piston pump with a minimum number of sensors; A second construction module is used to construct a constraint condition based on the effective characterization index, wherein the constraint condition includes a signal overlap rate constraint and an effective characterization index threshold constraint; The solution module is used to solve the objective function based on the initial conditions of the sensor layout optimization according to the signal overlap rate constraint and the effective characterization index threshold constraint to obtain the final position and number of sensor layout points.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the plunger pump sensor layout optimization method as described in any one of claims 1 to 7 is implemented.

10. A non-transitory readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the plunger pump sensor layout optimization method as described in any one of claims 1 to 7 is implemented.

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