Informationized ergonomics measuring method and system for transportation vehicle

Abstract

This invention primarily relates to the field of efficiency measurement technology. To improve the automation and accuracy of efficiency measurement for transport vehicles, this invention provides an information-based efficiency measurement method and system for transport vehicles. Its core is to monitor the vibration threshold range of the vehicle under different operational processes. Based on the vehicle's real-time vibration values, the system determines the time the vehicle spends in different operational processes such as loading, transporting, unloading, and standby. It also acquires the vehicle's load under each operational process; calculates the vehicle's actual transport mileage based on the vehicle's real-time location and a set mileage correction coefficient; and finally, based on the time and load of the vehicle in different operational processes, as well as the actual transport mileage, determines the vehicle's total efficiency and the efficiency of the vehicle under each operational process. Through the coordinated acquisition and fusion calculation of vibration, load, and location data, the entire process of efficiency measurement for transport vehicles is made information-based.

Description

Technical Field

[0001] This invention relates to the field of ergonomics measurement technology, and in particular to an information ergonomics measurement method and system for transport vehicles. Background Technology

[0002] Ergonomics measurement refers to the activity of collecting, processing, and analyzing data on the consumption of labor, materials, and machinery during construction to determine the necessary quantities of labor, materials, and machinery required to produce a qualified product. Ergonomics measurement is a fundamental research task in the field of construction engineering. The measurement results serve as the basis for the formulation and revision of industry and enterprise quotas, and are also important data references for enterprise project bidding and cost control. Traditional ergonomics measurement mainly involves collecting data through continuous manual tracking and on-site monitoring. This method is time-consuming, poses certain safety risks in the working environment, and is extremely costly. Therefore, although the construction industry has long recognized the importance of ergonomics measurement results, it has historically had very limited data available.

[0003] In recent years, with the gradual development of video surveillance and Internet of Things technologies, certain technological innovations have been brought to the collection of ergonomic measurement data. However, many core issues still need to be addressed:

[0004] (1) Some existing technologies can only obtain the working time of machinery through video monitoring, Internet of Things (IoT) technology, but cannot automatically collect the output completed by the machinery. Therefore, it is still impossible to achieve fully information-based measurement of the efficiency of construction machinery. For example, IoT technology can be used to obtain the data that a dump truck runs for 5 hours in 1 day, but it cannot determine how many km the dump truck traveled or how many m³ it transported in 1 day. 3 The real challenge lies in how to collect construction waste manually, and how to collect information on the transportation mileage and output of construction machinery, and then achieve fully information-based measurement of the efficiency of construction machinery.

[0005] (2) At present, most existing technologies obtain the overall working time of machinery by means of real-time vibration monitoring, current monitoring and other means. However, they cannot distinguish the detailed working time of machinery under each process operation state. For example, the Internet of Things technology can monitor the total running time of a concrete mixer truck, but it cannot distinguish how much driving time, how much material receiving time, how much material discharging time, and how much start-up waiting time are included in the total running time. Therefore, how to achieve a more precise measurement of the mechanical consumption at the process operation level is another major challenge.

[0006] (3) The efficiency of transport vehicles is related to the working time of the machinery and the load of the vehicle, as well as the transport mileage information. Currently, most vehicle instrument panels display an accuracy of km, which cannot meet the m-level accuracy requirement for efficiency measurement. How to automatically collect high-precision vehicle transport mileage data is also a challenge. Summary of the Invention

[0007] This invention provides a method and system for measuring the efficiency of transport vehicles, aiming to improve the automation and accuracy of efficiency measurement.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems

[0009] On one hand, the present invention provides a method for measuring the information efficiency of a transport vehicle, the method comprising:

[0010] Monitor the vibration threshold range of the vehicle under different operating procedures, and determine the time the vehicle is in different operating procedures based on the vibration threshold range;

[0011] Obtain the vehicle's load capacity during each operational process;

[0012] The actual transport mileage of the vehicle is calculated based on the vehicle's real-time location and the set mileage correction factor.

[0013] The total efficiency of a vehicle is determined based on the time and load of the vehicle during different work processes, as well as the actual mileage of the vehicle. The efficiency of the vehicle under each work process is also determined based on these factors.

[0014] Furthermore, the monitoring of the vibration threshold range under different operating procedures of the vehicle includes: acquiring linear acceleration data and attitude data of the vehicle under different operating procedures, compensating for attitude interference in the linear acceleration data based on the attitude data, and processing the compensated data to extract the vibration threshold range.

[0015] Furthermore, obtaining the vehicle's load capacity during each operational process includes:

[0016] Collect deformation values ​​at the points of maximum deformation angle of the leaf springs on both sides of the vehicle frame under unloaded, partially loaded, and fully loaded conditions. , , And obtain the actual load of the vehicle under empty, partially loaded, and fully loaded conditions. , Establish a formula for calculating vehicle load capacity:

[0017] ;

[0018] In the formula: Let be the vehicle's load value at time i during vehicle operation. Let i be the deformation value at the point where the deformation angle of the leaf springs on both sides of the frame is the maximum at time i;

[0019] Calculation of single-trip load transportation by vehicle Take the average value as the sample load value for that trip. :

[0020] ;

[0021] In the formula, n represents the total number of times the deformation value is collected during a single trip of the vehicle with a load.

[0022] Furthermore, the actual transport mileage of the vehicles The calculation method is as follows:

[0023] ;

[0024] ;

[0025] ;

[0026] ;

[0027] ;

[0028] In the formula, This is the mileage correction factor. For vehicles in The spatial distance between the current moment and the previous moment. For vehicles in The horizontal distance between the current moment and the previous moment. , , for The vehicle's location at any given time is measured in longitude, latitude, and altitude.

[0029] Furthermore, the mileage correction factor is:

[0030] ;

[0031] ;

[0032] In the formula, The measured mileage value of the test section.

[0033] Furthermore, the work efficiency value of the transportation process is... The work efficiency values ​​for the remaining processes are: Total work efficiency value: In the formula, For the operation time of the transportation process, Let j be the operation time of the j-th process excluding the transportation process. Let the efficiency of the j-th process (excluding transportation processes) be denoted as . This refers to the number of operations other than transportation operations.

[0034] Furthermore, the method also includes: when the vehicle deviates and the deviance value exceeds the set deviance angle threshold, triggering inflection point compensation to increase the vehicle positioning transmission frequency.

[0035] On the other hand, the present invention also provides an information-based efficiency measurement system for transport vehicles, the system comprising: a vibration monitoring terminal, a load monitoring terminal, a positioning terminal, and an efficiency calculation module;

[0036] The vibration monitoring terminal is used to monitor the vibration threshold range of the vehicle under different operating procedures, and to determine the time when the vehicle is operating under different operating procedures based on the vibration threshold range.

[0037] The load monitoring terminal is used to obtain the vehicle load under each process operation.

[0038] The positioning terminal is used to calculate the actual transport mileage of the vehicle based on the vehicle's real-time location and a set mileage correction factor.

[0039] The efficiency calculation module is used to determine the total efficiency of a vehicle and the efficiency of the vehicle in each process operation based on the time and load of the vehicle in different processes and the actual transportation mileage of the vehicle.

[0040] Furthermore, the positioning terminal is installed in the vehicle cab, the vibration monitoring terminal is attached to the cab glass, and the load monitoring terminal is installed on the vehicle frame. The vibration monitoring terminal and the load monitoring terminal are connected to the positioning terminal via an RS485 wiring harness.

[0041] Furthermore, the positioning terminal is also used to compensate for inflection points, specifically including: setting a deflection angle start value; when the vehicle deflects and the deflection value exceeds the set deflection angle threshold, triggering inflection point compensation; and sending the vehicle positioning information with time encryption.

[0042] The beneficial effects of this invention are:

[0043] (1) The operation time of loading, transportation, unloading and standby processes is automatically distinguished by vibration monitoring. The vehicle load is automatically obtained by load monitoring terminal and calibration formula. The high-precision transportation mileage is automatically calculated by positioning terminal and correction coefficient. No manual on-site tracking is required, which reduces the cost and safety risk of efficiency measurement.

[0044] (2) By using attitude compensation technology to eliminate the interference of vehicle attitude changes on vibration data, by using inflection point compensation to improve the accuracy of mileage calculation at turning points, and by using three-point calibration and Lagrange interpolation to improve the accuracy of load calculation, the reliability and accuracy of overall data acquisition are significantly improved, and the informatization, automation and refinement of the measurement of transport vehicle efficiencies are truly realized. Attached Figure Description

[0045] Figure 1Flow chart of the information-based work efficiency measurement method for a transport vehicle according to the present invention;

[0046] Figure 2 Schematic diagram of the installation position of the information-based work efficiency measurement system for a transport vehicle according to the present invention;

[0047] In the figure, the markings are: 1 - transport vehicle, 2 - vibration monitoring terminal, 3 - load monitoring terminal, 4 - positioning terminal, 5 - work efficiency calculation module. Specific embodiments

[0048] Since the existing vehicle work efficiency measurement methods cannot truly achieve accurate acquisition of all-information data on mechanical working time, transport mileage, and carrying weight, and cannot accurately grasp the work efficiency of transport vehicles in various process operations. The present invention provides an information-based work efficiency measurement method for transport vehicles, which determines the time of the vehicle in different process operations such as loading, transportation, unloading, and standby by monitoring the vibration value of the vehicle; obtains the vehicle load under each process operation of the vehicle; calculates the actual transport mileage of the vehicle based on the real-time position of the vehicle and the set mileage correction coefficient; and finally determines the total work efficiency of the vehicle and the work efficiency of the vehicle in each process operation based on the time and load of the vehicle in different process operations, as well as the actual transport mileage of the vehicle. Through the collaborative acquisition and fusion calculation of vibration, load, and position data, the whole process informatization of transport vehicle work efficiency measurement is realized.

[0049] The following further describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0050] As Figure 1 shown, an information-based work efficiency measurement method for a transport vehicle according to the present invention includes the following steps:

[0051] S1. Determine the vibration threshold range of the transport vehicle in different process operations

[0052] A一趟transport process of a transport vehicle can be sequentially divided into four process operation states: loading, transportation, unloading, and standby. The vibration thresholds of the vehicle in the four process operations are collected to form the vibration threshold range in each process operation state.

[0053] Specifically, ① non-process operation: vibration value < V0; ② standby process operation: V0 < vibration value < V1; ③ loading process operation: V1 < vibration value < V2; ④ transportation process operation: V2 < vibration value < V3; ⑤ unloading process operation: V3 < vibration value < V4.

[0054] The specific values of V1, V2, V3, and V4 can be set in combination with the vibration curve law of the transport vehicle in the four types of process operations. It should be noted that there seems to be an incorrect expression "A一趟" in line , which might be a typo. If this is a real error in the original text, it should be corrected before translation for a more accurate result. The above translation is based on the provided text as it is.

[0055] It should be further explained that when the vibration values ​​of the four types of processes are not collected in the order of standby, loading, transportation and unloading, the vibration value intervals of the above processes can be adjusted according to the actual order of magnitude.

[0056] S2. Determine the time the vehicle is in different work processes based on the vibration value.

[0057] Based on the vibration values ​​of the transport vehicle, determine which process the vehicle is operating in and record the time the vehicle is operating in the corresponding process. For example, if the vibration value of the vehicle is greater than V2 and less than V3 within a certain time period, then the vehicle is operating in the corresponding process during that time period; if the vibration value of the vehicle is greater than V3 and less than V4 within a certain time period, then the vehicle is unloading during that time period.

[0058] As a further optimization, when monitoring the vehicle's vibration value, linear acceleration data and attitude data of the vehicle are also acquired. Attitude interference compensation is performed on the linear acceleration data based on the attitude data, and the compensated data is processed to extract the vehicle vibration value.

[0059] S3. Obtain the vehicle load under each process operation.

[0060] Collect deformation values ​​at the points of maximum deformation angle of the leaf springs on both sides of the vehicle frame under unloaded, partially loaded, and fully loaded conditions. , , Simultaneously, the total vehicle and cargo weights G0, G1, and G2 recorded on the weighbridge under empty, partially loaded, and fully loaded conditions are obtained. The vehicle load weights for the three transport tests (empty, partially loaded, and fully loaded) are then calculated, and assigned as 0, G1, G2 ... , ;according to , , The numerical values ​​are used to form a vehicle load calculation formula based on the Lagrange formula. :

[0061] ;

[0062] In the formula: Let i be the vehicle's load value at time i; Let i be the value of the load monitoring terminal at time i; The vehicle load during non-full load transportation testing. The vehicle load during a full-load transport test.

[0063] Calculation of single-trip load transportation by vehicle Calculate the average load value for this sample trip. :

[0064] ;

[0065] In the formula: n is the total number of times the deformation value is collected during a single trip of the vehicle with a load.

[0066] S4. Calculate the actual transport mileage of the vehicle based on the vehicle's real-time location and the set mileage correction factor.

[0067] Since the mileage display accuracy of current transport vehicle dashboards is mostly in kilometers, which cannot meet the accuracy requirements of efficiency measurement, this invention calculates the real-time mileage of the transport vehicle by real-time positioning. The mileage is calculated by sending the vehicle's longitude, latitude, and altitude values ​​in real time through a positioning terminal. The details are as follows:

[0068] ;

[0069] ;

[0070] ;

[0071] ;

[0072] ;

[0073] In the formula, This is the mileage correction factor. For vehicles in The spatial distance between the current moment and the previous moment. For vehicles in The horizontal distance between the current moment and the previous moment. , , for The vehicle's location at any given time is measured in longitude, latitude, and altitude.

[0074] Specifically, mileage correction factor The methods for obtaining it include:

[0075] To eliminate system errors introduced by the positioning terminal, a transportation test must be conducted on the vehicle after the positioning terminal is installed. The mileage calculated by the positioning terminal on the test route is then used to determine the correct distance. Compared with the measured mileage of the road section Back-calculation of correction coefficients :

[0076] ;

[0077] ;

[0078] In the formula, To measure the actual mileage of the test section, tools such as a measuring tape and a portable wheeled rangefinder can be used.

[0079] To further explain, in order to improve the accuracy of the mileage correction factor k, data can be collected and calculated multiple times under different road sections.

[0080] S5. Calculate the total vehicle efficiency and the efficiency of each process.

[0081] In this embodiment, the vehicle's working time is divided into four processes: standby, loading, transportation, and unloading. The efficiency and total efficiency for each of the four processes are calculated:

[0082] ;

[0083] ; ; ; ;

[0084] In the formula: T is the total work efficiency value; T s T1 is the efficiency value of the transportation process (i.e., the working time of the transportation process per unit load transported 1km); T2 is the efficiency value of the loading process (i.e., the working time of the loading process per unit load of vehicle); T3 is the efficiency value of the unloading process (i.e., the working time of the unloading process per unit load of vehicle); t is the efficiency value of the standby process (i.e., the working time of the standby process per unit load of vehicle); s t1 is the total time during which the vibration value of the vehicle is in the interval (V2, V3) during a single trip; t2 is the total time during which the vibration value of the vehicle is in the interval (V1, V2) during a single trip; t3 is the total time during which the vibration value of the vehicle is in the interval (V3, V4) during a single trip; and t4 is the total time during which the vibration value of the vehicle is in the interval (V0, V1) during a single trip.

[0085] This invention also provides a method and system for measuring the information efficiency of transport vehicles, such as... Figure 2 As shown, the system includes a vibration monitoring terminal 2, a load monitoring terminal 3, a positioning terminal 4, and a work efficiency calculation module 5. The vibration monitoring terminal 2 monitors the vibration threshold range of the vehicle under different operational processes and determines the time the vehicle spends in each process based on the vibration value range. The load monitoring terminal 3 acquires the vehicle's load under each operational process. The positioning terminal 4 calculates the vehicle's actual transport mileage based on the vehicle's real-time location and a set mileage correction factor. The work efficiency calculation module 5 determines the vehicle's total work efficiency and the work efficiency of the vehicle under each operational process based on the time and load of the vehicle during different operational processes and the vehicle's actual transport mileage.

[0086] The positioning terminal 4 is installed inside the cab of the transport vehicle 1, the vibration monitoring terminal 2 is attached to the cab window, and the load monitoring terminal 3 is installed on the vehicle frame of the transport vehicle 1. The vibration monitoring terminal 2 and the load monitoring terminal 3 are connected to the positioning terminal 4 via an RS485 wiring harness. The positioning terminal 4 uploads the collected data to the ergonomics calculation module 5 in real time via a 4G communication network.

[0087] To ensure continuous operation of the equipment, both the positioning terminal 4 and the vibration monitoring terminal 2 are equipped with solar charging panels, enabling independent power supply for the terminal devices without relying on the vehicle's power source. Furthermore, to cope with signal-free environments such as tunnels, the positioning terminal 4 has a data caching function, allowing it to locally cache monitoring data when the signal is interrupted and upload it all at once the signal is restored.

[0088] As a preferred option, the positioning terminal also has an inflection point compensation function, which specifically includes: setting a deflection angle start value; when the vehicle deflects and the deflection value exceeds the deflection angle start value, inflection point compensation is triggered, and the vehicle positioning information is sent with time encryption.

Claims

1. A method for measuring the information efficiency of a transport vehicle, characterized in that, The method includes: Monitor the vibration threshold range of the vehicle under different operating procedures, and determine the time the vehicle is in different operating procedures based on the vibration threshold range; Obtain the vehicle's load capacity during each operational process; The actual transport mileage of the vehicle is calculated based on the vehicle's real-time location and the set mileage correction factor. The total efficiency of a vehicle is determined based on the time and load of the vehicle during different work processes, as well as the actual mileage of the vehicle. The efficiency of the vehicle under each work process is also determined based on these factors.

2. The method for measuring the information efficiency of a transport vehicle according to claim 1, characterized in that, The vibration threshold range for monitoring vehicles under different operational processes includes: acquiring linear acceleration data and attitude data of the vehicle under different operational processes, compensating for attitude interference in the linear acceleration data based on the attitude data, and processing the compensated data to extract the vibration threshold range.

3. The method for measuring the information efficiency of a transport vehicle according to claim 1, characterized in that, Obtaining the vehicle's load capacity during each operational process includes: Collect deformation values ​​at the points of maximum deformation angle of the leaf springs on both sides of the vehicle frame under unloaded, partially loaded, and fully loaded conditions. , , And obtain the actual load of the vehicle under empty, partially loaded, and fully loaded conditions. , Establish a formula for calculating vehicle load capacity: ； In the formula: Let be the vehicle's load value at time i during vehicle operation. Let i be the deformation value at the point where the deformation angle of the leaf springs on both sides of the frame is the maximum at time i; Calculation of single-trip load transportation by vehicle Take the average value as the sample load value for that trip. : ； In the formula, n represents the total number of times the deformation value is collected during a single trip of the vehicle with a load.

4. The method for measuring the information efficiency of a transport vehicle according to claim 3, characterized in that, Actual transport mileage of vehicles The calculation method is as follows: ； ； ； ； ； In the formula, This is the mileage correction factor. For vehicles in The spatial distance between the current moment and the previous moment. For vehicles in The horizontal distance between the current moment and the previous moment. , , for The vehicle's location at any given time is measured in longitude, latitude, and altitude.

5. The method for measuring the information efficiency of a transport vehicle according to claim 4, characterized in that, The mileage correction factor is: ； ； In the formula, The measured mileage value of the test section.

6. The method for measuring the information efficiency of a transport vehicle according to claim 5, characterized in that, Transportation process work efficiency value The work efficiency values ​​for the remaining processes are: ; Total work efficiency value: In the formula, For the operation time of the transportation process, Let j be the operation time of the j-th process excluding the transportation process. Let the efficiency of the j-th process (excluding transportation processes) be denoted as . This refers to the number of operations other than transportation operations.

7. A method for measuring the information efficiency of a transport vehicle according to any one of claims 1-6, characterized in that, The method further includes: when the vehicle deviates and the deviance value exceeds the set deviance angle threshold, triggering inflection point compensation to increase the vehicle positioning transmission frequency.

8. A system for measuring the information efficiency of a transport vehicle, used to implement the method for measuring the information efficiency of a transport vehicle as described in any one of claims 1-7, characterized in that, The system includes: a vibration monitoring terminal, a load monitoring terminal, a positioning terminal, and an efficiency calculation module; The vibration monitoring terminal is used to monitor the vibration threshold range of the vehicle under different operating procedures, and to determine the time when the vehicle is operating under different operating procedures based on the vibration threshold range. The load monitoring terminal is used to obtain the vehicle load under each process operation. The positioning terminal is used to calculate the actual transport mileage of the vehicle based on the vehicle's real-time location and a set mileage correction factor. The efficiency calculation module is used to determine the total efficiency of a vehicle and the efficiency of the vehicle in each process operation based on the time and load of the vehicle in different processes and the actual transportation mileage of the vehicle.

9. The information efficiency measurement system for transport vehicles according to claim 8, characterized in that, The positioning terminal is installed in the vehicle cab, the vibration monitoring terminal is attached to the cab glass, and the load monitoring terminal is installed on the vehicle frame. The vibration monitoring terminal and the load monitoring terminal are connected to the positioning terminal via an RS485 wiring harness.

10. The information efficiency measurement system for a transport vehicle according to claim 8, characterized in that, The positioning terminal is also used for inflection point compensation, specifically including: setting a deflection angle start value; when the vehicle deflects and the deflection value exceeds the set deflection angle threshold, triggering inflection point compensation; and sending the vehicle positioning information with time encryption.

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