WO2024011838A1

WO2024011838A1 - Mining dump truck oil consumption monitoring method based on electric power analysis

Info

Publication number: WO2024011838A1
Application number: PCT/CN2022/138235
Authority: WO
Inventors: 咸金龙; 张波; 袁金祥; 赵耀忠; 马广玉; 曹鋆程; 田�文明; 刘强; 刘跃; 董帅
Original assignee: 华能伊敏煤电有限责任公司
Priority date: 2022-07-15
Filing date: 2022-12-10
Publication date: 2024-01-18
Also published as: CN115183828A

Abstract

A mining dump truck oil consumption monitoring method based on electric power analysis. The method comprises: collecting the instantaneous electric power of a truck engine, and using the instantaneous electric power to compute cumulative power consumption in a fixed time period; taking statistics regarding the amount of oil added to the vehicle within a corresponding operating time, and calculating a coefficient model between the power consumption and the oil consumption in the fixed time period; using the coefficient model in combination with the electric power collected by the vehicle system to convert to fuel consumption in the specified time period; and dividing according to the nature of the work, to obtain the oil consumption of any operating time period. By using the instantaneous electric power of the dump truck to obtain power consumption and oil consumption coefficients, oil consumption in a specified time period can be accurately calculated, thereby improving oil consumption accuracy; moreover, the oil consumption in the specified time period can be applied according to the use time, obtaining the instantaneous oil consumption and the operation performance of a target vehicle, and simultaneously also being able to compare cumulative oil consumption against the driving oil consumption of an operating driver.

Description

A fuel consumption monitoring method for mining dump trucks based on electric power analysis

Technical field

The present invention relates to the technical field related to truck fuel consumption, and in particular to a fuel consumption monitoring method for mining dump trucks based on electrical power analysis.

Background technique

Large dump trucks consume huge amounts of fuel, consuming about 1.8 tons of diesel in 24 hours of operation. However, due to various problems with existing measurement methods such as float oil sensors, oil rod inductive sensors, and engine instantaneous fuel consumption, fuel consumption statistics are inaccurate and cannot support refined management and other needs.

The problems with existing oil level detection devices are as follows: The float-type oil level sensor that comes with the original vehicle has very poor reliability and will be damaged after long-term operation. Moreover, in a giant fuel tank with a capacity of more than 2 tons, the oil level in the tank sways greatly due to the influence of inertia and road gradient when the vehicle is running, and the float follows the oil level sloshing a lot, resulting in inaccurate measurement results. Later, we installed an oil rod inductive sensor ourselves. This sensor is highly reliable, but it still cannot solve the problem of inaccurate measurement caused by oil level shaking.

Contents of the invention

The purpose of this section is to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, the abstract and the title of the invention to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the invention.

In view of the above-mentioned existing problems, the present invention is proposed.

Therefore, the present invention provides a method that can solve the problem of inaccurate real-time fuel consumption monitoring of large dump trucks and inability to support refined management.

In order to solve the above technical problems, the present invention provides the following technical solutions, including: collecting the instantaneous electric power of the truck engine, using the instantaneous electric power to calculate the cumulative power consumption within a fixed time period; counting the refueling amount of the vehicle during the corresponding operating time, Calculate the coefficient model between power consumption and fuel consumption within a fixed period of time; combine the coefficient model with the electrical power collected by the vehicle system to convert the fuel consumption in the specified period; divide according to the nature of the work to obtain the fuel consumption in any working period Fuel consumption.

As a preferred solution of the fuel consumption monitoring method of mining dump trucks based on electric power analysis according to the present invention, the cumulative power consumption within a fixed period of time is

Among them, x: instantaneous electric power, unit is HP; S: sampling rate; H: cumulative power consumption (kWh) within the specified time period; hp/kw represents the coefficient for converting horsepower into kilowatts.

As a preferred solution of the mining dump truck fuel consumption monitoring method based on electrical power analysis according to the present invention, it includes: converting the sampling rate of x into a ratio in hours. If the sampling rate of x is 1 second, then S = 60 seconds × 60 minutes = 3600.

As a preferred solution of the fuel consumption monitoring method of mining dump trucks based on electric power analysis according to the present invention, the coefficient of power consumption and fuel consumption in a fixed time period is, C=H/L

Among them, L: the amount of refueling within a fixed period of time; H: the power consumption (kWh) within a fixed period of time; C: the coefficient between electric power consumption and fuel consumption.

As a preferred solution of the mining dump truck fuel consumption monitoring method based on electric power analysis according to the present invention, the fuel consumption in the specified time period is

Among them, O: fuel consumption within a specified time; Hi: power consumption (kWh) within a specified time; C: coefficient between electric power consumption and fuel consumption.

As a preferred solution of the fuel consumption monitoring method of mining dump trucks based on electric power analysis according to the present invention, the data is preliminarily processed according to the requirements on the instantaneous electric power acquisition system of the truck engine to form the calculated Accumulated power consumption data; the data will be cleared at fixed time points every day according to different work requirements, and spliced before use.

As a preferred solution of the mining dump truck fuel consumption monitoring method based on electric power analysis according to the present invention, when the time period of Hi becomes extremely small, such as 1 second, the corresponding O is equivalent to instantaneous Fuel consumption; on models that do not have a fuel flow meter or whose instantaneous fuel consumption is inaccurate, use this value to replace the display of instantaneous fuel consumption.

As a preferred solution of the fuel consumption monitoring method of mining dump trucks based on electric power analysis according to the present invention, the fuel consumption O in a specified time period can be cut arbitrarily according to the nature of the work, and the accumulated time in any time period can be obtained. segment fuel consumption; combined with the statistics of refueling volume, the fuel consumption of each driver in the specified time period can be calculated; by counting the accurate cumulative time period fuel consumption of each driver during the driving time period, the driver's operating fuel consumption can be realized Accurate comparison of quantities.

As a preferred solution of the fuel consumption monitoring method of mining dump trucks based on electric power analysis according to the present invention, the difference in actual fuel consumption is determined by the difference in the amount of refueling L within a fixed period of time and the power consumption H within a fixed period of time. The coefficient C of the vehicle's power consumption and fuel consumption; use the coefficient C of the power consumption and fuel consumption of the same vehicle to determine the impact of the target vehicle's operating conditions and its own characteristics on fuel consumption. The smaller C, the better choice target vehicle.

Beneficial effects of the present invention: The present invention obtains the power consumption and fuel consumption coefficients based on the instantaneous electric power of the dump truck, can accurately calculate the fuel consumption in a specified period, and greatly improves the accuracy of fuel consumption. And the fuel consumption in a specified period obtained through this method can be applied according to the usage time to obtain the instantaneous fuel consumption and operating performance of the target vehicle. At the same time, the cumulative fuel consumption can also be used to compare the operating driver's driving fuel consumption.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting any creative effort. in:

Figure 1 is a schematic flow chart of a mining dump truck fuel consumption monitoring method based on electrical power analysis according to an embodiment of the present invention.

Figure 2 is a truck electric power data curve diagram of the mining dump truck fuel consumption monitoring method based on electric power analysis according to the embodiment of the present invention.

Figure 3 is a comparison chart of power consumption and fuel consumption of the mining dump truck fuel consumption monitoring method based on electric power analysis according to the embodiment of the present invention.

Figure 4 is a data diagram of the refueling metering system statistics of the mining dump truck fuel consumption monitoring method based on electrical power analysis according to the embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It is obvious that the described embodiments are part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by ordinary people in the art without creative efforts should fall within the protection scope of the present invention.

Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Those skilled in the art can do so without departing from the connotation of the present invention. Similar generalizations are made, and therefore the present invention is not limited to the specific embodiments disclosed below.

Second, reference herein to "one embodiment" or "an embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

The present invention will be described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional diagrams showing the device structure will be partially enlarged according to the general scale. Moreover, the schematic diagrams are only examples and shall not limit the present invention. scope of protection. In addition, the three-dimensional dimensions of length, width and depth should be included in actual production.

At the same time, in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention. The invention and simplified description are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore are not to be construed as limitations of the invention. Furthermore, the terms "first, second or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless otherwise clearly stated and limited in the present invention, the terms "installation, connection, and connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can also be a mechanical connection, an electrical connection, or a direct connection. A connection can also be indirectly connected through an intermediary, or it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Example 1

Referring to Figure 1, a first embodiment of the present invention is provided. This embodiment provides a fuel consumption monitoring method for mining dump trucks based on electrical power analysis, including:

The power system of the large dump truck is a coaxial generator driven by a diesel engine. After the generator output current is adjusted through the control system, it is then sent to the two rear-wheel drive motors to enable the vehicle to move. From the perspective of energy conservation, even if various losses between the engine and the generator are taken into account, the output power of the engine and the output power of the generator should be a linear correspondence. The maximum power of the engine we use can be found in official materials, which is about 2570HP, and the maximum output power of its electronic control system we collected is also about 2500HP, which proves the power output between the engine and the generator. The loss is very small. In order to calculate detailed changes in fuel consumption, the specific steps are as follows.

S1: Collect the instantaneous electric power of the truck engine, and use the instantaneous electric power to calculate the cumulative power consumption within a fixed period of time;

On the instantaneous electric power acquisition system that comes with the truck engine, the data is initially processed according to needs to form the calculated cumulative power consumption data; the data will be cleared at fixed time points every day according to different work requirements, and the data will be cleared before use. Splicing processing.

The cumulative power consumption within a fixed period of time is

Among them, x: instantaneous electrical power, unit is HP; S: sampling rate;

H: Cumulative power consumption (kWh) within the specified time period; hp/kw represents the coefficient for converting horsepower into kilowatts.

The sampling rate of x is converted into a ratio in hours. If the sampling rate of x is 1 second, then

S = 60 seconds × 60 minutes = 3600.

S2: Count the refueling amount of the vehicle during the corresponding running time, and calculate the coefficient model between the power consumption and fuel consumption within a fixed time period.

The coefficient of electricity consumption and fuel consumption in a fixed period of time is,

C＝H/L

S3: Use the coefficient model combined with the electric power collected by the vehicle system to convert the fuel consumption in the specified time period.

The fuel consumption in a specified period of time is

S4: Divide according to the nature of work and obtain the fuel consumption in any working period.

When the time period of Hi becomes extremely small, such as 1 second, the corresponding O is equivalent to the instantaneous fuel consumption; on models without a fuel flow meter or with inaccurate instantaneous fuel consumption, this value is used to replace the display of instantaneous fuel consumption. .

Furthermore, the fuel consumption O in a specified time period can be cut arbitrarily according to the nature of the work, and the cumulative fuel consumption in any time period can be obtained;

For example, the traditional refueling metering system can only count the cumulative fuel consumption between two refuelings, and cannot subdivide the fuel consumption between two refuelings. If there are multiple drivers driving between two refuelings, and you want to calculate the fuel consumption of each driver, this requirement cannot be realized. By combining the statistics of refueling volume, each driver's fuel consumption in a specified time period can be calculated. By counting the accurate cumulative time period fuel consumption in each driver's driving time period, an accurate comparison of the driver's fuel consumption can be achieved. .

Furthermore, through the difference between the actual fuel consumption of the refueling amount L within a fixed time and the power consumption H within a fixed time, the coefficient C of the power consumption and fuel consumption of different vehicles is calculated; using the power consumption and fuel consumption of the same vehicle The coefficient C of the quantity is used to determine the impact of the target vehicle's operating conditions and its own characteristics on fuel consumption. The smaller C is, the optimal target vehicle is selected.

Theoretically, two identical vehicles consume the same energy under the same working conditions. However, since the actual working conditions of each car are different, even two cars of the same model have subtle differences in their own characteristics, which ultimately leads to different actual fuel consumption of each car. Reflected in the formula is that the C of each car is different. Conversely, this characteristic can also be used to use the C of each vehicle to determine the impact of the vehicle's operating conditions and its own characteristics on fuel consumption. The smaller the C, the higher the fuel consumption of the vehicle.

Example 2

In order to verify and illustrate the technical effects used in this method, this embodiment selects existing vehicle data to be substituted into this method for testing, and verifies the test results with scientific demonstration methods to verify the real effects of this method.

The power system of the large dump truck is a coaxial generator driven by a diesel engine. After the generator output current is adjusted through the control system, it is then sent to the two rear-wheel drive motors to enable the vehicle to move. Therefore, from the perspective of energy conservation, even if various losses between the engine and the generator are included, the output power of the engine and the output power of the generator should be a linear correspondence. The maximum power of the currently used engine can be found in official materials, which is about 2570HP, and the maximum output power of the electronic control system collected is also about 2500HP, which proves the power output loss between the engine and the generator. very small. The electric power data curve is shown in Figure 2.

The white polyline with large changes in Figure 3 is the cumulative power consumption H calculated using the instantaneous electric power of the engine. For ease of use, we designed this cumulative value to be reset to 0 every time the driver changes shifts. Our shift change The time is 1:00, 8:00 and 17:00 every day. The two places marked with gray boxes in the figure are shift handover time points, so the cumulative power consumption data is reset to 0. The black curve with a smaller change is the engine speed. Comparing the two curves, it can be seen that the cumulative power consumption curve continues to rise during the continuous operation of the engine.

In the interval of box 1, the engine is always in idling state, and the accumulated power consumption rises slowly. In the box 2 interval, the engine speed is 0, which means the engine is stalled, and the accumulated power consumption has not increased during this period. Overall, the overall trend of cumulative power consumption calculated from instantaneous power consumption is in line with the trend rules of fuel consumption.

The output power of the engine is proportional to the fuel consumption of the engine, so by collecting the output power of the vehicle electronic control system in real time (the sampling rate is required to be no more than 1 second), the cumulative power consumption within a certain period of time is integrated. Then by counting the refueling amount of the vehicle during the corresponding running time and dividing the two, the coefficient between the vehicle's generator power and fuel consumption can be calculated. Using this coefficient, real-time fuel consumption can be calculated from the electrical power collected by the vehicle system. The fuel consumption we calculated through this coefficient and the electric power fed back by the vehicle in real time was compared with the fuel consumption recorded by the refueling system, and the error was within 5%. Considering that the full tank oil level cannot be accurately controlled for each refueling, the error can be within the acceptable range.

Actual data analysis found that even if the same model is configured with the same model, there are subtle differences in the coefficient between different individuals, but it is generally around 3.0. Therefore, the coefficient of each vehicle needs to be calibrated separately to make the results more accurate.

Table 1: Truck No. 3 data sheet

Furthermore, in terms of data collection, since we have preliminarily processed the data according to our needs on the vehicle electric power consumption collection system, the data recorded in the table is already the calculated cumulative power data, and the unit is kWh. . In order to facilitate statistics, this data will be cleared at 1 o'clock, 8 o'clock, and 17 o'clock every day, so you need to perform splicing processing yourself when using it. This time of 1:00, 8:00, and 17:00 every day is based on the existing work pattern. Drivers will change shifts and handover at this time.

Affected by external environmental parameters such as temperature, you need to use the "mass" data in the "actual density refueling information this time" when using it. There may be errors in other data such as volume.

First, we use a piece of refueling data to calculate the coefficient C. The logic is as follows: Find two consecutive refueling records. The time between the end of the first refueling and the start of the second refueling is the fuel consumption time corresponding to the second refueling amount. .

For example, as shown in Figure 4, between 2021-12-28 12:11:29 and 2021-12-29 10:44:28, the fuel consumption recorded by the corresponding refueling system is 1328.51Kg.

The data processing and calculation process is more troublesome. Using Python code for processing, the power consumption is 3670.3kw/h:

Use this power consumption H to calculate the coefficient C=3670.03/1328.51≈2.76 through C=H/L.

Then use this coefficient to find another refueling record to verify. For example, between 2021-12-29 10:44:28 and 2021-12-30 10:58:30, the fuel consumption recorded by the refueling system is 1391.51Kg.

According to O=H/C, the calculated fuel consumption O=3917.17/2.76≈1491.26Kg. Comparing the 1391.51Kg recorded by the refueling system, the error is ≈0.077%.

After many tests, most of the result errors are within 5%. When calculating the coefficient C, you can calculate it multiple times and take the average value after removing outliers, so that the result will be more accurate.

It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present invention can be carried out. Modifications or equivalent substitutions without departing from the spirit and scope of the technical solution of the present invention shall be included in the scope of the claims of the present invention.

Claims

A method for monitoring fuel consumption of mining dump trucks based on electric power analysis, which is characterized by including:

Collect the instantaneous electric power of the truck engine, and use the instantaneous electric power to calculate the cumulative power consumption within a fixed period of time;

Count the refueling amount of the vehicle during the corresponding running time, and calculate the coefficient model between the power consumption and fuel consumption within a fixed time period;

Combining the coefficient model with the electric power collected by the vehicle system, the fuel consumption in the specified period of time is converted;

Divide according to the nature of work and obtain the fuel consumption in any working period.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis according to claim 1, characterized in that it includes: the cumulative power consumption within a fixed period of time is

Among them, x: instantaneous electrical power, unit is HP; S: sampling rate;

H: Cumulative power consumption (kWh) within the specified time period; hp/kw represents the coefficient for converting horsepower into kilowatts.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis as claimed in claim 2, characterized in that it includes: the sampling rate S is the ratio after the sampling rate of x is converted into hours. If the sampling rate of x is 1 second, Then S = 60 seconds × 60 minutes = 3600.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis according to claim 3, characterized in that it includes: the coefficient of power consumption and fuel consumption in a fixed time period is, C=H/L, where, L: fixed Amount of refueling within a certain period of time; H: power consumption within a fixed period of time (kWh);

C: The coefficient between electric power consumption and fuel consumption.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis according to claim 4, characterized in that it includes: the fuel consumption in a specified time period is

Among them, O: fuel consumption within the specified time; Hi: power consumption within the specified time (kWh);

C: The coefficient between electric power consumption and fuel consumption.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis as claimed in claim 5, characterized in that it includes: performing preliminary processing on the data according to requirements on the instantaneous electric power acquisition system of the truck engine to form a calculated Accumulated power consumption data; the data will be cleared at fixed time points every day according to different work requirements, and spliced before use.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis according to claim 6, characterized in that it includes: when the time period of Hi becomes extremely small, such as 1 second, the corresponding consumption within the specified time is obtained. The oil quantity O is equivalent to the instantaneous fuel consumption; on models without a fuel flow meter or with inaccurate instantaneous fuel consumption, this value is used instead of the instantaneous fuel consumption display.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis as claimed in claim 7, characterized in that it includes: the fuel consumption O in a specified time period can be cut arbitrarily according to the nature of the work, and the accumulated time in any time period can be obtained segment fuel consumption; combined with the data of the refueling amount L, each driver's fuel consumption in a specified time period O can be counted; by counting the accurate cumulative time period fuel consumption of each driver's driving time period, the driver's operation process can be realized Accurate comparison of fuel consumption.
The fuel consumption monitoring method of mining dump trucks based on electric power analysis according to claim 8, characterized in that it includes: calculating the difference in actual fuel consumption based on the difference in fuel consumption L within a fixed period of time and the power consumption H within a fixed period of time. The coefficient C between the vehicle’s power consumption and fuel consumption;

The coefficient C of the power consumption and fuel consumption of different vehicles is used to determine the impact of the target vehicle's working conditions and its own characteristics on fuel consumption. The smaller C, the more optimal the target vehicle is.