Hydraulic efficiency evaluation method and device for oil cylinder and engineering vehicle

Abstract

This application relates to a method, apparatus, and engineering vehicle for evaluating the hydraulic efficiency of a hydraulic cylinder, belonging to the field of engineering machinery technology. The method includes obtaining the current emission characteristic value of the vehicle to be evaluated; obtaining a first reference standard value; obtaining a second reference standard value; and obtaining an evaluation value of the current hydraulic efficiency of the vehicle's cylinder based on the current emission characteristic value, the first reference standard value, and the second reference standard value. This method, apparatus, and engineering vehicle can improve the accuracy of the hydraulic efficiency evaluation results and reduce costs without adding additional sensors.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a method, device, and engineering vehicle for evaluating the hydraulic efficiency of a hydraulic cylinder. Background Technology

[0002] In concrete pump trucks, concrete discharge capacity is a crucial dimension for evaluating pumping performance, and the hydraulic efficiency of the hydraulic cylinders is a key factor affecting this capacity. Therefore, assessing the hydraulic efficiency of the cylinders can effectively measure both concrete discharge capacity and construction progress. Current technology relies on adding extra sensors (such as vibration sensors) to the hydraulic system and using single data points from these sensors to evaluate cylinder hydraulic efficiency. This not only increases costs but also results in low accuracy. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a method, apparatus, and engineering vehicle for evaluating the hydraulic efficiency of a hydraulic cylinder, which can improve the accuracy of the evaluation results and reduce costs without adding additional sensors.

[0004] In a first aspect, one embodiment of this application provides a method for evaluating the hydraulic efficiency of a hydraulic cylinder, including:

[0005] Obtain the current emission characteristic value of the vehicle to be evaluated; wherein, the emission characteristic value represents the coverage area of ​​the electric proportional displacement of the cylinder within the current threshold range during a first preset time period;

[0006] Obtain a first reference standard value; wherein the first reference standard value represents the emission characteristic value of the target vehicle within a first historical period; the target vehicle and the vehicle to be evaluated are the same model vehicle;

[0007] Obtain a second reference standard value; wherein the second reference standard value characterizes the emission characteristic value of the vehicle to be evaluated within a second historical period; and

[0008] The hydraulic efficiency evaluation value of the vehicle's cylinders is obtained based on the current emission characteristic value of the vehicle to be evaluated, the first reference standard value, and the second reference standard value.

[0009] According to a first aspect of this application, obtaining the current emission characteristic values ​​of the vehicle to be evaluated includes:

[0010] Obtain the cylinder operating condition data of the vehicle to be evaluated within the first preset time period; and

[0011] Based on the cylinder operating data, the current emission characteristic value of the vehicle to be evaluated is obtained.

[0012] According to a first aspect of this application, obtaining the current emission characteristic value of the vehicle to be evaluated based on the cylinder operating data includes:

[0013] Based on the cylinder operating data, a relational model is established; wherein, the relational model represents the correspondence between the electric proportional displacement and the current within the first preset time period;

[0014] Based on the relationship model and the current threshold, the current emission characteristic value of the vehicle to be evaluated is obtained.

[0015] According to a first aspect of this application, establishing a relational model based on the cylinder operating data includes:

[0016] The hydraulic cylinder operating condition data is divided into operating condition data corresponding to multiple working segments;

[0017] Based on the operating condition data corresponding to the multiple working sections, the electric proportional displacement and the current corresponding to different working sections are obtained;

[0018] The relationship model is established based on the electric proportional displacement and the current corresponding to the multiple working segments.

[0019] According to a first aspect of this application, the first preset duration includes multiple sub-durations, and each sub-duration includes multiple working segments;

[0020] After dividing the hydraulic cylinder operating condition data into operating condition data corresponding to multiple working segments, the step of establishing a relational model based on the hydraulic cylinder operating condition data further includes:

[0021] Remove the target sub-duration and the corresponding work segment's condition data; wherein, the number of work segments included within the target sub-duration is less than a number threshold;

[0022] Based on the number of the target sub-durations that were removed, the same number of the sub-durations and the corresponding working condition data of multiple working segments are supplemented from the cylinder history data of the vehicle to be evaluated.

[0023] According to a first aspect of this application, obtaining the first reference standard value includes:

[0024] Multiple emission characteristic values ​​corresponding to multiple operating durations of multiple reference vehicles within the first historical time period are obtained; wherein, each reference vehicle corresponds to one emission characteristic value within each operating duration; and all multiple reference vehicles are of the same model as the vehicle to be evaluated.

[0025] Based on multiple emission characteristic values ​​of the aforementioned reference vehicles, performance characteristic values ​​for different reference vehicles are obtained; wherein, the performance characteristic values ​​characterize the excellence and stability of the hydraulic cylinder performance of the reference vehicles; and

[0026] The reference vehicle with the largest performance characteristic value is selected as the target vehicle, and the largest emission characteristic value of the target vehicle is used as the first reference standard value.

[0027] According to a first aspect of this application, obtaining the second reference standard value includes:

[0028] Obtain multiple emission characteristic values ​​corresponding to multiple operating durations of the vehicle to be evaluated within the second historical time period;

[0029] The largest emission characteristic value is selected from the multiple emission characteristic values ​​corresponding to multiple operation durations within the second historical period as the second reference standard value.

[0030] According to a first aspect of this application, after obtaining multiple emission characteristic values ​​corresponding to the vehicle to be evaluated in different historical time periods, obtaining the second reference standard value further includes:

[0031] Based on the preset rejection rules, the abnormal emission characteristic values ​​are rejected;

[0032] The step of selecting the largest emission characteristic value from multiple emission characteristic values ​​corresponding to different historical time periods as the second reference standard value includes:

[0033] The largest emission characteristic value is selected from the remaining multiple emission characteristic values ​​as the second reference standard value.

[0034] According to a first aspect of this application, after obtaining the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated, the hydraulic cylinder efficiency evaluation method further includes:

[0035] If the hydraulic efficiency evaluation value of the cylinder is less than the efficiency threshold, a fault signal for the hydraulic system of the cylinder will be output.

[0036] Secondly, one embodiment of this application provides a hydraulic cylinder efficiency evaluation device, comprising:

[0037] The first acquisition module is configured to acquire the current emission characteristic value of the vehicle to be evaluated; wherein the emission characteristic value represents the coverage area of ​​the electric proportional displacement of the cylinder within a current threshold range during a first preset time period;

[0038] The second acquisition module is configured to acquire a first reference standard value; wherein the first reference standard value represents the emission characteristic value of the target vehicle within a first historical period; the target vehicle and the vehicle to be evaluated are the same model of vehicle;

[0039] The third acquisition module is configured to acquire a second reference standard value; wherein the second reference standard value represents the emission characteristic value of the vehicle to be evaluated within a second historical period; and

[0040] The first evaluation module is configured to obtain an evaluation value of the hydraulic cylinder efficiency of the vehicle under evaluation based on the current emission characteristic value of the vehicle under evaluation, the first reference standard value, and the second reference standard value.

[0041] Thirdly, one embodiment of this application provides an engineering vehicle, comprising:

[0042] The hydraulic efficiency evaluation device for hydraulic cylinders as described in the previous embodiment.

[0043] Fourthly, one embodiment of this application provides an electronic device, including:

[0044] processor;

[0045] And a memory for storing the processor's executable instructions;

[0046] The processor is used to execute the hydraulic efficiency evaluation method for hydraulic cylinders described in the above embodiments.

[0047] The hydraulic cylinder efficiency evaluation method, apparatus, engineering vehicle, and electronic equipment provided in this application obtain the current emission characteristic value of the vehicle to be evaluated, as well as a first reference standard value and a second reference standard value. Then, based on the current emission characteristic value, the first reference standard value, and the second reference standard value, the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated is obtained. Firstly, in calculating the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated, the current emission characteristic value, the first reference standard value, and the second reference standard value of the vehicle to be evaluated are referenced. This not only comprehensively considers both electric proportional displacement and current factors, increasing the amount of reference data, but also fully leverages the advantages of native data from vehicles of the same model as the vehicle to be evaluated and the vehicle itself, effectively improving the accuracy of the hydraulic cylinder efficiency evaluation result. Secondly, it can obtain the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated without relying on additional sensor data. In other words, compared to the solutions in related technologies that add additional sensors, the hydraulic cylinder efficiency evaluation apparatus provided in this application does not require additional sensors, effectively reducing costs. Attached Figure Description

[0048] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0049] Figure 1 This is a schematic flowchart of a hydraulic efficiency evaluation method for a hydraulic cylinder provided as an exemplary embodiment of this application.

[0050] Figure 2 A schematic diagram of the electric proportional displacement curve provided for an exemplary embodiment of this application.

[0051] Figure 3 This is a schematic diagram illustrating the process of obtaining the current emission characteristic values ​​of a vehicle to be evaluated, provided as an exemplary embodiment of this application.

[0052] Figure 4 This is a schematic diagram illustrating a process for obtaining the current emission characteristic values ​​of a vehicle to be evaluated based on cylinder operating condition data, provided as an exemplary embodiment of this application.

[0053] Figure 5 This is a flowchart illustrating the process of establishing a relational model based on hydraulic cylinder operating data, provided as an exemplary embodiment of this application.

[0054] Figure 6 This is a flowchart illustrating the process of establishing a relational model based on cylinder operating data, which is provided as another exemplary embodiment of this application.

[0055] Figure 7 This is a schematic diagram of a process for obtaining a first reference standard value, provided as an exemplary embodiment of this application.

[0056] Figure 8 This is a schematic diagram of a process for obtaining a second reference standard value, provided as an exemplary embodiment of this application.

[0057] Figure 9 A schematic diagram of the process for obtaining a second reference standard value is provided for another exemplary embodiment of this application.

[0058] Figure 10 A schematic flowchart of a method for evaluating the hydraulic efficiency of a cylinder provided as another exemplary embodiment of this application.

[0059] Figure 11 A structural block diagram of a hydraulic efficiency evaluation device for a cylinder provided as an exemplary embodiment of this application.

[0060] Figure 12 A structural block diagram of a hydraulic efficiency evaluation device for a cylinder provided as another exemplary embodiment of this application.

[0061] Figure 13 A structural block diagram of an electronic device provided for an exemplary embodiment of this application. Detailed Implementation

[0062] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0063] Figure 1 This is a schematic flowchart illustrating a method for evaluating the hydraulic efficiency of a hydraulic cylinder, provided as an exemplary embodiment of this application. Figure 1 As shown, the hydraulic efficiency evaluation method for hydraulic cylinders provided in this application embodiment may include:

[0064] S310: Obtain the current emission characteristics of the vehicle to be evaluated.

[0065] Specifically, the emission characteristic value can be understood as the coverage area of ​​the hydraulic cylinder's electric proportional displacement within the current threshold range during a first preset time period.

[0066] In one embodiment, the first preset duration corresponds to different time periods depending on the reference time node. For example, if the current time node is used as the reference time node, the first preset duration may include 5 days, 10 days, 15 days, etc., before the current time node; if the 30th day after the vehicle to be evaluated is put into production is used as the reference time node, the first preset duration may include 5 days, 10 days, 15 days, etc., before the 30th day after the production work begins.

[0067] In one embodiment, the first preset duration may also include the past 100 hours, the past 200 hours, the past 500 hours, etc., before the reference time node.

[0068] It should be noted that the electro-proportional displacement tends to increase with the increase of current (all currents mentioned in this article refer to the electro-proportional valve current). Figure 2 This is a schematic diagram of an electric proportional displacement curve provided for an exemplary embodiment of this application. Figure 2 As shown, in a rectangular coordinate system, with current as the horizontal axis and electric proportional displacement as the vertical axis, the curve showing the relationship between current and electric proportional displacement within a first preset time period is an upward-sloping curve.

[0069] It should be noted that, in Figure 2 In this context, the aforementioned emission characteristic value is the area enclosed by the electric proportional emission curve and the corresponding current threshold range (e.g., Figure 2 The area of ​​the shaded region indicated by the middle arrow E). Taking the case where the curvature of the electric proportional displacement curve is zero (the electric proportional displacement curve is a straight line) as an example:

[0070]

[0071] Where S represents the area enclosed by the electric proportional displacement curve and the corresponding current range, i.e., the emission characteristic value; a represents one of the current thresholds within the first preset time period; b represents another current threshold within the first preset time period; P a P represents the proportional displacement corresponding to the current threshold a; b Characterizes the proportional displacement corresponding to the current threshold b.

[0072] It should be understood that when the curvature of the electric proportional displacement curve is not zero, the area enclosed by the electric proportional displacement curve and the corresponding current threshold range can also be obtained through integration, i.e., the emission characteristic value.

[0073] It should be understood that both the electric proportional displacement and the current are important factors affecting the hydraulic efficiency of the cylinder. When calculating the emission characteristic value, both the electric proportional displacement and the current are taken into account. This provides a larger amount of data for reference, and the accuracy of the hydraulic efficiency of the cylinder obtained by applying the emission characteristic value will be higher.

[0074] It should be noted that the emission characteristic values ​​of different vehicles are evaluated using the hydraulic cylinders of different vehicles. For example, the current emission characteristic value of the vehicle to be evaluated mentioned above is evaluated using the hydraulic cylinders of the vehicle to be evaluated. The emission characteristic value of the target vehicle mentioned later is evaluated using the hydraulic cylinders of the target vehicle. Similarly, the emission characteristic value of the reference vehicle mentioned later is evaluated using the hydraulic cylinders of the reference vehicle.

[0075] It should be noted that the calculation process for emission characteristic values ​​is similar for different vehicles, and the calculation process for emission characteristic values ​​will be described in detail later.

[0076] S320: Obtain the first reference standard value.

[0077] Specifically, the first reference standard value can be understood as the emission characteristic value of the target vehicle within a first historical period, and the target vehicle is the same model as the vehicle being evaluated. Subsequently, using the first reference standard value as one of the evaluation criteria for assessing the hydraulic efficiency of the vehicle's cylinders can fully leverage the inherent advantages of data from manufacturers of the same model, further improving the accuracy of the hydraulic efficiency assessment results.

[0078] In one embodiment, there can be multiple reference vehicles of the same model as the vehicle to be evaluated. One of the multiple reference vehicles can be selected as the target vehicle. The specific selection process will be described in detail later.

[0079] In one embodiment, the number of reference vehicles of the same model as the vehicle to be evaluated is one, which can be used as the aforementioned target vehicle.

[0080] It should be noted that there can be multiple emission characteristic values ​​of the target vehicle within the first historical period, and one of these emission characteristic values ​​can be selected as the first reference standard value. In one embodiment, the maximum emission characteristic value of the target vehicle within the first historical period can be selected as the first reference standard value, which better characterizes the emission characteristics of the target vehicle.

[0081] S330: Obtain the second reference standard value.

[0082] Specifically, the second reference standard value can be understood as the emission characteristic value of the vehicle under evaluation within a second historical period. The preset historical period can be selected within the range from when the vehicle under evaluation rolled off the production line to the current time point; the specific selection process will be described in detail later.

[0083] It should be understood that using the second reference standard value as one of the evaluation standards for assessing the hydraulic efficiency of the vehicle under evaluation can give full play to the inherent advantages of the manufacturer's data for the vehicle under evaluation, and further improve the accuracy of the hydraulic efficiency assessment results.

[0084] It should be noted that there can be multiple emission characteristic values ​​of the vehicle under evaluation during the second historical period, and one of these emission characteristic values ​​can be selected as the second reference standard value. In one embodiment, the maximum emission characteristic value of the vehicle under evaluation during the second historical period can be selected as the second reference standard value, which better characterizes the emission characteristics of the vehicle under evaluation during the historical operating phase.

[0085] It should be noted that steps S310, S320 and S330 are not executed in any particular order. Any one or two of the three can be executed first, or all three can be executed simultaneously.

[0086] S340: Based on the current emission characteristic value of the vehicle to be evaluated, the first reference standard value, and the second reference standard value, the hydraulic efficiency evaluation value of the cylinder of the vehicle to be evaluated is obtained.

[0087] It should be understood that in the process of calculating the hydraulic efficiency assessment value of the vehicle under evaluation, the current emission characteristic value, the first reference standard value, and the second reference standard value of the vehicle under evaluation were taken into account. This not only comprehensively considered both the electric proportional displacement and current factors, increasing the amount of reference data, but also fully utilized the advantages of the original data of vehicles of the same model as the vehicle under evaluation and the vehicle under evaluation itself, effectively improving the accuracy of the hydraulic efficiency assessment result of the vehicle under evaluation.

[0088] Furthermore, it should be understood that the process of executing steps S310, S320, S330, and S340 does not require additional sensor data to obtain the evaluation value of the hydraulic efficiency of the vehicle's cylinder. In other words, compared with the solution of adding additional sensors in related technologies, the hydraulic efficiency evaluation method of the cylinder provided in this application embodiment does not require additional sensors, effectively reducing costs.

[0089] It should be noted that the calculation rules for the hydraulic cylinder efficiency assessment value of the vehicle under evaluation can be set according to the actual situation. There are various calculation rules, as long as the calculation rules can fully reflect the impact of the current emission characteristic value, the first reference standard value, and the second reference standard value of the vehicle under evaluation on the hydraulic cylinder efficiency assessment value. For example:

[0090]

[0091] Wherein, efficent represents the hydraulic efficiency of the vehicle's cylinder; st represents the current emission characteristic value of the vehicle; sh represents the first reference standard value; and sv represents the second reference standard value.

[0092] Figure 3 This is a schematic diagram illustrating the process of obtaining the current emission characteristic values ​​of a vehicle to be evaluated, provided as an exemplary embodiment of this application. Figure 3 As shown, step S310 includes:

[0093] S311: Obtain the cylinder operating condition data of the vehicle to be evaluated within the first preset time period.

[0094] S312: Based on the cylinder operating data, obtain the current emission characteristic value of the vehicle to be evaluated.

[0095] Specifically, cylinder operating data can include cylinder operating timestamps, cylinder displacement, electro-proportional valve current, engine speed, etc. It should be understood that cylinder operating data can be obtained through the vehicle's native systems and sensors, without the need for additional sensors.

[0096] Figure 4 This is a schematic diagram illustrating a process for obtaining the current emission characteristic values ​​of a vehicle to be evaluated based on cylinder operating condition data, provided as an exemplary embodiment of this application. Figure 4 As shown, step S312 includes:

[0097] S3121: Establish a relational model based on the hydraulic cylinder operating data.

[0098] It should be noted that the relational model can be understood as the correspondence between the electric proportional displacement and the current within a first preset time period. Generally, this relational model can be obtained by fitting a large amount of hydraulic cylinder operating data. The process of establishing the relational model will be described in detail later.

[0099] S3122: Based on the relationship model and current threshold, obtain the current emission characteristic value of the vehicle to be evaluated.

[0100] Specifically, within a first preset time period, the hydraulic cylinder operates continuously, and the control current changes constantly. From the acquired hydraulic cylinder operating data, a current threshold can be selected according to requirements. The current threshold is input into a relational model, and by running the model, the electric proportional displacement corresponding to the current threshold within the first preset time period can be calculated.

[0101] Specifically, referring to the preceding text, if the curvature of the electric proportional displacement curve is zero (the electric proportional displacement curve is a straight line), the emission characteristic value can be calculated using the following formula:

[0102]

[0103] If the curvature of the electric proportional displacement curve is not zero, the area enclosed by the electric proportional displacement curve and the corresponding current range can be obtained through integration, which is the emission characteristic value.

[0104] Figure 5 This is a flowchart illustrating the process of establishing a relational model based on hydraulic cylinder operating condition data, provided as an exemplary embodiment of this application. Figure 5 As shown, step S3121 includes:

[0105] S31211: Divide the hydraulic cylinder operating data into operating data corresponding to multiple working segments.

[0106] Specifically, the hydraulic cylinder operating data can be divided into multiple working segments according to the displacement of the hydraulic cylinder. Each stroke of the hydraulic cylinder can be divided into a working segment, and the operating data of the hydraulic cylinder in each stroke is the operating data corresponding to that working segment.

[0107] In one embodiment, the hydraulic cylinder operating data can also be divided into multiple working segments according to the number of times the hydraulic cylinder reverses. For example, every two reversals of the hydraulic cylinder can be divided into one working segment.

[0108] S31212: Based on the operating condition data corresponding to multiple working sections, obtain the electric proportional displacement and current corresponding to different working sections.

[0109] Specifically, the formula for calculating the electric proportional displacement corresponding to different working sections can be:

[0110]

[0111] Where p represents the electric proportional displacement; ΔL represents the cylinder displacement; S represents the cylinder cross-sectional area; Δt represents the displacement time; and r represents the engine speed.

[0112] It should be understood that the cylinder displacement, cylinder cross-sectional area, displacement time, and engine speed can all be obtained from the operating condition data of each working segment.

[0113] It should be noted that the current in step S31212 can be obtained by calculating the average value of multiple currents within the corresponding working segment. In one embodiment, the currents corresponding to multiple time nodes can be obtained, and then the average value can be calculated to obtain the final current.

[0114] In one embodiment, one current can be selected from multiple currents corresponding to multiple time points as the final current.

[0115] In one embodiment, since the time span of each working segment is short, to improve the calculation efficiency of the average current, the average current can be calculated based on the current corresponding to the start node and the current corresponding to the end node of each working segment. That is:

[0116]

[0117] Where Is represents the average current; I t1 Characterizes the current corresponding to the starting node of each working segment; I t2 This characterizes the current at the end node of each working segment.

[0118] S31213: Establish a relational model based on the electric proportional displacement and current corresponding to multiple working sections.

[0119] Specifically, each working segment corresponds to an electric proportional displacement and a current. Based on the electric proportional displacement and current corresponding to multiple working segments, a relationship model between the electric proportional displacement and the current can be established.

[0120] Figure 6 This is a flowchart illustrating the process of establishing a relational model based on hydraulic cylinder operating condition data, provided as another exemplary embodiment of this application. Figure 6 As shown, after step S31211, step S3121 further includes:

[0121] S31214: Remove the target sub-duration and the corresponding working condition data of the work segment.

[0122] S31215: Based on the number of target sub-durations that have been removed, supplement the same number of sub-durations and the corresponding working condition data of multiple working segments from the cylinder history data of the vehicle to be evaluated.

[0123] Specifically, the first preset duration includes multiple sub-durations, and each sub-duration includes multiple work segments. For example, the first preset duration is the past 10 days of the current time node, the sub-duration is 1 day, and each day includes multiple work segments.

[0124] It should be noted that if the number of work segments included in the target sub-time period is less than the number threshold, then it can be considered that the working condition data included in the target sub-time period is too small to form effective data. In this case, the working condition data of the target sub-time period and its corresponding work segments can be removed from multiple sub-time periods.

[0125] After completing the elimination step, the number of target sub-durations to be eliminated can be determined. Then, the same number of sub-durations and corresponding working condition data of multiple working segments can be supplemented from the cylinder history data of the vehicle to be evaluated. This ensures that a sufficient number of effective working condition data are provided, thereby effectively ensuring the accuracy of the subsequent relationship model.

[0126] Figure 7 This is a schematic diagram illustrating the process of obtaining a first reference standard value, provided for an exemplary embodiment of this application. Figure 7 As shown, step S320 includes:

[0127] S321: Obtain multiple emission characteristic values ​​corresponding to multiple operating durations of multiple reference vehicles within the first historical time period.

[0128] It should be noted that the multiple reference vehicles are all of the same model as the vehicle to be evaluated, and each reference vehicle has an emission characteristic value corresponding to each operating time. The calculation process is similar to the calculation process of the current emission characteristic value of the aforementioned vehicle to be evaluated.

[0129] In one embodiment, if the reference vehicle has been in operation for n days, one day is taken as a reference time node. The first preset duration before this reference time node can be understood as one of the operating durations within the aforementioned first historical duration. Different reference time nodes correspond to different operating durations within the first historical duration. For example, if the reference vehicle has been in operation for 30 days, the 20th day of operation is taken as the reference time node. The 10 days before this reference time node can be considered as one of the operating durations within the first historical duration. It is worth noting that "10 days" here can be understood as the aforementioned first preset duration. It should be understood that by using different time nodes as reference time nodes, multiple operating durations within the first historical duration can be obtained, and the emission characteristic value corresponding to each operating duration within the first historical duration can be calculated.

[0130] S322: Based on multiple emission characteristic values ​​of multiple reference vehicles, obtain the performance characteristic values ​​of different reference vehicles.

[0131] S323: Select the reference vehicle with the largest performance characteristic value as the target vehicle, and take the largest emission characteristic value of the target vehicle as the first reference standard value.

[0132] It should be noted that each reference vehicle has corresponding emission characteristic values ​​for different operating durations. To obtain the first reference standard value, it is necessary to select the most representative reference vehicle and its corresponding emission characteristic value from multiple reference vehicles. Step S322 involves calculating multiple emission characteristic values ​​for each reference vehicle according to certain rules to obtain performance characteristic values ​​that reflect the superiority and stability of the reference vehicle's cylinder performance. Then, step S323 is executed to select the reference vehicle with the largest performance characteristic value as the target vehicle, and the maximum emission characteristic value of the target vehicle is used as the first reference standard value.

[0133] It should be noted that the calculation rules for performance characteristic values ​​derived from multiple emission characteristic values ​​can be set according to actual conditions, as long as the calculation results can be used to evaluate the excellence and stability of the hydraulic cylinder performance. For example, the formula for calculating performance characteristic values ​​can be:

[0134] score i =max(si) / log(std(si));

[0135] Among them, score i The maximum emission characteristic value is represented by max(si); the maximum emission characteristic value is represented by std(si); the standard deviation of multiple emission characteristic values ​​is represented by std(si).

[0136] It should be understood that, through the above formula, the performance characteristic value corresponding to each reference vehicle can be calculated, and then the reference vehicle corresponding to the maximum performance characteristic value is determined as the target vehicle, and the largest emission characteristic value among the target vehicles is taken as the first reference characteristic value.

[0137] Figure 8 This is a schematic diagram illustrating the process of obtaining a second reference standard value, provided for an exemplary embodiment of this application. For example... Figure 8 As shown, step S330 may include:

[0138] S331: Obtain multiple emission characteristic values ​​corresponding to multiple operating durations of the vehicle to be evaluated within the second historical period.

[0139] S332: Select the largest emission characteristic value from multiple emission characteristic values ​​corresponding to multiple operation durations within the second historical period as the second reference standard value.

[0140] Specifically, based on the cylinder operating condition data of the vehicle under evaluation during multiple operating periods within the second historical period, multiple emission characteristic values ​​corresponding to different operating periods can be obtained.

[0141] When evaluating a vehicle from its initial production start date to the current time, one day is used as a reference time point. The first preset duration before this reference time point can be understood as one of the operating durations within the aforementioned second historical duration. Different reference time points correspond to different operating durations within the second historical duration. For example, if the time from the initial production start date to the current time point is one year, the 100th day of that year is used as the reference time point. The 10 days before this reference time point can be considered as one of the operating durations within the second historical duration. It is worth noting that "10 days" here can be understood as the aforementioned first preset duration. It should be understood that by using different time points as reference time points, multiple operating durations within the second historical duration can be obtained, and thus, the emission characteristic value corresponding to each operating duration within the second historical duration can be obtained.

[0142] Step S332 is executed, where the largest emission characteristic value is used as the second reference standard value, which can represent the best state of cylinder performance during the historical operation of the vehicle to be evaluated.

[0143] Figure 9 This is a schematic diagram illustrating the process of obtaining a second reference standard value, provided as another exemplary embodiment of this application. (See diagram below.) Figure 9 As shown, after step S331, step S330 further includes:

[0144] S333: Based on the preset rejection rules, reject abnormal emission characteristic values.

[0145] Correspondingly, step S332 includes:

[0146] S3321: Select the largest emission characteristic value from the remaining multiple emission characteristic values ​​as the second reference standard value.

[0147] Specifically, the preset rejection rules can be set according to the actual situation. For example, if the emission characteristic value is greater than the first threshold, the emission characteristic value can be considered abnormal and rejected. Similarly, if the emission characteristic value is less than the second threshold, the emission characteristic value can also be considered abnormal and rejected.

[0148] It should be understood that performing steps S333 and S3321 can ensure the validity of the emission characteristic values, thereby ensuring the accuracy of the second reference standard value.

[0149] Figure 10 A schematic flowchart illustrating a method for evaluating the hydraulic efficiency of a cylinder, provided as another exemplary embodiment of this application. Figure 10As shown, after step S340, the hydraulic efficiency evaluation method for the cylinder may further include:

[0150] S350: If the hydraulic efficiency evaluation value of the cylinder is greater than or equal to the efficiency threshold, output a signal that the hydraulic efficiency evaluation value of the cylinder is qualified.

[0151] S360: If the hydraulic efficiency assessment value of the cylinder is less than the efficiency threshold, output a signal indicating a fault in the hydraulic system of the cylinder.

[0152] Specifically, after executing step S340, the hydraulic system can be assessed based on the hydraulic efficiency evaluation value obtained in step S340 to determine whether a fault has occurred in the hydraulic system. Specifically, if the hydraulic efficiency evaluation value is greater than or equal to the efficiency threshold, a signal indicating that the hydraulic system is functioning normally and without fault can be output. If the hydraulic efficiency evaluation value is less than the efficiency threshold, the hydraulic system is considered not to have achieved the corresponding working effect, indicating a fault in the hydraulic system, and a signal indicating a fault in the hydraulic system can be output.

[0153] In one embodiment, for both steps S350 and S360, only one may be performed in practice.

[0154] Figure 11 This is a structural block diagram of a hydraulic cylinder efficiency evaluation device provided as an exemplary embodiment of this application. Figure 11 As shown, the hydraulic cylinder efficiency evaluation device 500 provided in this application embodiment may include: a first acquisition module 510, configured to acquire the current emission characteristic value of the vehicle to be evaluated; wherein the emission characteristic value represents the coverage area of ​​the electric proportional displacement of the cylinder within a current threshold range within a first preset time period; a second acquisition module 520, configured to acquire a first reference standard value; wherein the first reference standard value represents the emission characteristic value of the target vehicle within a first historical time period; the target vehicle and the vehicle to be evaluated are the same model of vehicle; a third acquisition module 530, configured to acquire a second reference standard value; wherein the second reference standard value represents the emission characteristic value of the vehicle to be evaluated within a second historical time period; and a first evaluation module 540, configured to obtain the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated based on the current emission characteristic value of the vehicle to be evaluated, the first reference standard value, and the second reference standard value.

[0155] The hydraulic cylinder efficiency evaluation device provided in this application obtains the current emission characteristic value of the vehicle to be evaluated, as well as a first reference standard value and a second reference standard value. Then, based on the current emission characteristic value, the first reference standard value, and the second reference standard value, it obtains the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated. Firstly, in calculating the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated, it references the current emission characteristic value, the first reference standard value, and the second reference standard value of the vehicle to be evaluated. This not only comprehensively considers both electric proportional displacement and current factors, increasing the amount of referenceable data, but also fully leverages the advantages of native data from vehicles of the same model as the vehicle to be evaluated and the vehicle itself, effectively improving the accuracy of the hydraulic cylinder efficiency evaluation result. Secondly, it can obtain the hydraulic cylinder efficiency evaluation value of the vehicle to be evaluated without relying on additional sensor data. In other words, compared to related technologies that add additional sensors, the hydraulic cylinder efficiency evaluation device provided in this application does not require additional sensors, effectively reducing costs.

[0156] Figure 12 A structural block diagram of a hydraulic cylinder efficiency evaluation device provided as another exemplary embodiment of this application. (See diagram below.) Figure 12 As shown, in one embodiment, the first acquisition module 510 includes a fourth acquisition module 511, configured to acquire cylinder operating condition data of the vehicle to be evaluated within a first preset time period; and a first calculation module 512, configured to obtain the current emission characteristic value of the vehicle to be evaluated based on the cylinder operating condition data.

[0157] like Figure 12 As shown, in one embodiment, the first calculation module 512 includes a first establishment module 5121, configured to establish a relational model based on cylinder operating data; wherein, the relational model characterizes the correspondence between electric proportional displacement and current within a first preset time period; the second calculation module 5122 is configured to obtain the current emission characteristic value of the vehicle to be evaluated based on the relational model and the current threshold.

[0158] like Figure 12 As shown, in one embodiment, the first establishment module 5121 includes a division module 51211, configured to divide the cylinder working condition data into working condition data corresponding to multiple working segments; a third calculation module 51212, configured to obtain the electric proportional displacement and current corresponding to different working segments based on the working condition data corresponding to multiple working segments; and a second establishment module 51213, configured to establish a relationship model based on the electric proportional displacement and current corresponding to multiple working segments.

[0159] like Figure 12As shown, in one embodiment, the first establishment module 5121 includes a first elimination module 51214, configured to eliminate the working condition data of the target sub-time and the corresponding working segment; wherein, the number of working segments included in the target sub-time is less than a number threshold; the supplementation module 51215 is configured to supplement the same number of sub-times and the working condition data of the corresponding multiple working segments from the cylinder historical data of the vehicle to be evaluated according to the number of eliminated target sub-times.

[0160] like Figure 12 As shown, in one embodiment, the second acquisition module 520 includes a fifth acquisition module 521, configured to acquire multiple emission characteristic values ​​corresponding to multiple operating durations of multiple reference vehicles within a first historical time period; wherein each reference vehicle corresponds to one emission characteristic value within each operating duration; the multiple reference vehicles are all of the same model as the vehicle to be evaluated; a fourth calculation module 522, configured to obtain performance characteristic values ​​of different reference vehicles based on the multiple emission characteristic values ​​of the multiple reference vehicles; wherein the performance characteristic value characterizes the degree of excellence and stability of the performance of the reference vehicle; and a second selection module 523, configured to select the reference vehicle with the largest performance characteristic value as the target vehicle, and use the largest emission characteristic value of the target vehicle as the first reference standard value.

[0161] like Figure 12 As shown, in one embodiment, the third acquisition module 530 includes a sixth acquisition module 531, configured to acquire multiple emission characteristic values ​​corresponding to multiple operating times of the vehicle to be evaluated within a second historical period; and a third selection module 532, configured to select the largest emission characteristic value from the multiple emission characteristic values ​​corresponding to multiple operating times within the second historical period as a second reference standard value.

[0162] like Figure 12 As shown, in one embodiment, the third acquisition module 530 includes a second rejection module 533, configured to reject abnormal emission characteristic values ​​according to a preset rejection rule; correspondingly, the third selection module 532 is further configured to select the largest emission characteristic value from the remaining multiple emission characteristic values ​​as a second reference standard value.

[0163] like Figure 12 As shown, in one embodiment, the hydraulic cylinder efficiency evaluation device 500 may include a first output module 550 configured to output a signal indicating that the hydraulic cylinder efficiency evaluation value is qualified if the hydraulic cylinder efficiency evaluation value is greater than or equal to an efficiency threshold; and a second output module 560 configured to output a signal indicating that the hydraulic cylinder system is faulty if the hydraulic cylinder efficiency evaluation value is less than the efficiency threshold.

[0164] An embodiment of this application also provides an engineering vehicle that includes the hydraulic cylinder efficiency evaluation device as described in the foregoing embodiment and has all the functions of the hydraulic cylinder efficiency evaluation device. The beneficial effects of the engineering vehicle can be referred to the beneficial effects of the foregoing hydraulic cylinder efficiency evaluation device.

[0165] In one embodiment, the engineering vehicle may include a pump truck, excavator, crane, etc.

[0166] Figure 13 This is a structural block diagram of an electronic device provided as an exemplary embodiment of this application. (See diagram below.) Figure 13 As shown, the electronic device 800 can be either or both of the first device and the second device, or a standalone device independent of them, which can communicate with the first device and the second device to receive the collected input signals from them.

[0167] like Figure 13 As shown, the electronic device 800 includes one or more processors 810 and a memory 820. The memory 820 is used to store executable instructions of the processor 810, which is used to execute the cylinder hydraulic efficiency evaluation method as described in the previous embodiment.

[0168] The processor 810 may be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and may control other components in the electronic device 800 to perform desired functions.

[0169] The memory 820 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 810 may execute the program instructions to implement the control methods and / or other desired functions of the various embodiments of this application described above. Various contents such as input signals, signal components, and noise components may also be stored in the computer-readable storage medium.

[0170] In one example, the electronic device 800 may also include an input device 830 and an output device 840, which are interconnected via a bus system and / or other forms of connection mechanism (not shown).

[0171] When the controller is a standalone device, the input device 830 can be a communication network connector for receiving the acquired input signals from the first device and the second device.

[0172] In addition, the input device 830 may also include, for example, a keyboard, a mouse, etc.

[0173] The output device 840 can output various information to the outside, including determined distance information, direction information, etc. The output device 840 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0174] Of course, for the sake of simplicity, Figure 13 Only some of the components of the electronic device 800 relevant to this application are shown in this illustration; components such as buses, input / output interfaces, etc., are omitted. In addition, the electronic device 800 may include any other suitable components depending on the specific application.

[0175] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0176] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0177] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0178] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0179] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0180] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0181] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for evaluating the hydraulic efficiency of a hydraulic cylinder, characterized in that, include: Obtain the current emission characteristic value of the vehicle to be evaluated; wherein, the emission characteristic value represents the coverage area of ​​the electric proportional displacement of the cylinder within the current threshold range within a first preset time period; the first preset time period includes multiple sub-time periods, and each sub-time period includes multiple working segments; The step of obtaining the current emission characteristic value of the vehicle to be evaluated includes: obtaining the cylinder operating condition data of the vehicle to be evaluated within the first preset time period; establishing a relationship model based on the cylinder operating condition data, wherein the relationship model represents the correspondence between the electric proportional displacement and the current within the first preset time period; and obtaining the current emission characteristic value of the vehicle to be evaluated based on the relationship model and the current threshold. The step of establishing a relational model based on the cylinder operating condition data includes: dividing the cylinder operating condition data into operating condition data corresponding to multiple working segments; removing the target sub-duration and the corresponding operating condition data of the working segments; wherein the number of working segments included in the target sub-duration is less than a number threshold; and supplementing the same number of the sub-duration and the corresponding multiple working segment operating condition data from the cylinder historical data of the vehicle to be evaluated based on the number of removed target sub-durations. Obtain a first reference standard value; wherein the first reference standard value represents the emission characteristic value of the target vehicle within a first historical period; the target vehicle and the vehicle to be evaluated are the same model vehicle; Obtain a second reference standard value; wherein the second reference standard value characterizes the emission characteristic value of the vehicle to be evaluated within a second historical period; and The hydraulic efficiency evaluation value of the vehicle's cylinders is obtained based on the current emission characteristic value of the vehicle to be evaluated, the first reference standard value, and the second reference standard value.

2. The method for evaluating the hydraulic efficiency of a hydraulic cylinder according to claim 1, characterized in that, The step of establishing a relational model based on the hydraulic cylinder operating data includes: Based on the operating condition data corresponding to the multiple working sections, the electric proportional displacement and the current corresponding to different working sections are obtained; The relationship model is established based on the electric proportional displacement and the current corresponding to the multiple working segments.

3. The method for evaluating the hydraulic efficiency of a hydraulic cylinder according to claim 1, characterized in that, The process of obtaining the first reference standard value includes: Multiple emission characteristic values ​​corresponding to multiple operating durations of multiple reference vehicles within the first historical time period are obtained; wherein, each reference vehicle corresponds to one emission characteristic value within each operating duration; and all multiple reference vehicles are of the same model as the vehicle to be evaluated. Based on multiple emission characteristic values ​​of the aforementioned reference vehicles, performance characteristic values ​​for different reference vehicles are obtained; wherein, the performance characteristic values ​​characterize the excellence and stability of the hydraulic cylinder performance of the reference vehicles; and The reference vehicle with the largest performance characteristic value is selected as the target vehicle, and the largest emission characteristic value of the target vehicle is used as the first reference standard value.

4. The method for evaluating the hydraulic efficiency of a hydraulic cylinder according to claim 1, characterized in that, The process of obtaining the second reference standard value includes: Obtain multiple emission characteristic values ​​corresponding to multiple operating durations of the vehicle to be evaluated within the second historical time period; The largest emission characteristic value is selected from the multiple emission characteristic values ​​corresponding to multiple operation durations within the second historical period as the second reference standard value.

5. The method for evaluating the hydraulic efficiency of a hydraulic cylinder according to claim 1, characterized in that, After obtaining the hydraulic efficiency evaluation value of the cylinder of the vehicle to be evaluated, the hydraulic efficiency evaluation method further includes: If the hydraulic efficiency evaluation value of the cylinder is less than the efficiency threshold, a fault signal for the hydraulic system of the cylinder will be output.

6. A hydraulic efficiency evaluation device for a hydraulic cylinder, characterized in that, include: The first acquisition module is configured to acquire the current emission characteristic value of the vehicle to be evaluated; wherein, the emission characteristic value represents the coverage area of ​​the electric proportional displacement of the cylinder within a current threshold range within a first preset time period; the first preset time period includes multiple sub-time periods, and each sub-time period includes multiple working segments; The first acquisition module is specifically configured to: acquire the cylinder operating condition data of the vehicle to be evaluated within the first preset time period; establish a relationship model based on the cylinder operating condition data, wherein the relationship model represents the correspondence between the electric proportional displacement and the current within the first preset time period; obtain the current emission characteristic value of the vehicle to be evaluated based on the relationship model and the current threshold; establishing the relationship model includes: dividing the cylinder operating condition data into operating condition data corresponding to multiple working segments; removing the target sub-time period and the corresponding operating condition data of the working segments; wherein the number of working segments included in the target sub-time period is less than a number threshold; and supplementing the same number of sub-time periods and the corresponding multiple working segment operating condition data from the cylinder historical data of the vehicle to be evaluated based on the number of removed target sub-time periods. The second acquisition module is configured to acquire a first reference standard value; wherein the first reference standard value represents the emission characteristic value of the target vehicle within a first historical period; the target vehicle and the vehicle to be evaluated are the same model of vehicle; The third acquisition module is configured to acquire a second reference standard value; wherein the second reference standard value represents the emission characteristic value of the vehicle to be evaluated within a second historical period; and The first evaluation module is configured to obtain an evaluation value of the hydraulic cylinder efficiency of the vehicle under evaluation based on the current emission characteristic value of the vehicle under evaluation, the first reference standard value, and the second reference standard value.

7. An engineering vehicle, characterized in that, include: The hydraulic efficiency evaluation device for hydraulic cylinders as described in claim 6.

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