A method for detecting the load weight of an electric locomotive

Abstract

The disclosure provides a motor car loading weight detection method, comprising the following steps: S1: obtaining the inclination angle of the motor car, and obtaining the slope direction of the motor car according to the inclination angle of the motor car; S2: obtaining the torque of the motor car, and obtaining the traction of the motor car according to the torque; S3: obtaining the total weight of the motor car according to the inclination angle of the motor car, the slope direction of the motor car and the traction of the motor car; S4: obtaining the loading weight of the motor car according to the total weight of the motor car. In the motor car loading weight detection method, the loading weight of the material after loading is detected, the error of the loading weight detection is effectively reduced, the accuracy of the loading weight detection result is improved, the construction is efficiently and safely ensured, meanwhile, the whole method avoids setting the weighing sensor and other components on the motor car, not only effectively reduces the cost of the motor car loading weight detection, but also avoids the problems of low construction efficiency and high construction cost caused by replacing the weighing sensor.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of weight detection, in particular to a detection method of loading weight of an electric locomotive. BACKGROUND

[0002] The electric locomotive is a device for rail vehicle transportation. The electric locomotive is driven by an electric motor to rotate the wheels, and realizes the running of the whole vehicle on the track by means of the friction between the wheels and the track surface. In the field of shield construction, the electric locomotive is not only used to transport materials such as mortar and pipe segments into the tunnel, but also used to transport materials such as spoil outside the tunnel. The weight of the materials loaded on the electric locomotive is an important construction parameter, and the monitoring of the weight of the materials is a prerequisite for ensuring efficient and safe construction.

[0003] At present, the weight detection methods mainly include pre-loading weighing and post-loading weighing. The pre-loading weighing method is mainly to use a belt weighing device, a belt cross-section scanning device and the like to detect the weight of the materials before loading. However, since the materials contain a large number of substances, the error of the weight detection is large. The post-loading weighing method is mainly to add a weighing sensor and the like on the chassis to detect the weight of the materials after loading. Although this method can ensure the accuracy of the weight detection, the weighing sensor and the like are easily damaged due to the harsh working environment, and the replacement of the damaged components not only affects the construction progress, but also reduces the construction efficiency, consumes a large amount of manpower and material resources, and increases the construction cost. SUMMARY

[0004] The present disclosure aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, the purpose of the present disclosure is to provide a detection method of loading weight of an electric locomotive.

[0006] To achieve the above purpose, the present disclosure provides a detection method of loading weight of an electric locomotive, comprising: S1: obtaining the inclination angle of the electric locomotive, and obtaining the slope direction of the electric locomotive according to the inclination angle of the electric locomotive; S2: obtaining the torque of the electric locomotive, and obtaining the traction force of the electric locomotive according to the torque; S3: obtaining the total weight of the electric locomotive according to the inclination angle of the electric locomotive, the slope direction of the electric locomotive and the traction force of the electric locomotive; S4: obtaining the loading weight of the electric locomotive according to the total weight of the electric locomotive.

[0007] Optionally, the obtaining the slope direction of the electric locomotive according to the inclination of the electric locomotive comprises: S101: obtaining the positive or negative value of the inclination of the electric locomotive according to the height of the head of the electric locomotive and the height of the tail of the electric locomotive; S102: obtaining the positive or negative value of the running of the electric locomotive according to the running direction of the electric locomotive; S103: obtaining the slope direction of the electric locomotive according to the positive or negative value of the inclination of the electric locomotive and the positive or negative value of the running of the electric locomotive.

[0008] Optionally, the obtaining the positive or negative value of the inclination of the electric locomotive according to the height of the head of the electric locomotive and the height of the tail of the electric locomotive comprises: S1011: when the height of the head of the electric locomotive is greater than the height of the tail of the electric locomotive, the inclination of the electric locomotive is positive; S1012: when the height of the head of the electric locomotive is less than the height of the tail of the electric locomotive, the inclination of the electric locomotive is negative.

[0009] Optionally, the obtaining the positive or negative value of the running of the electric locomotive according to the running direction of the electric locomotive comprises: S1021: when the electric locomotive is advancing, the running of the electric locomotive is positive; S1022: when the electric locomotive is retreating, the running of the electric locomotive is negative.

[0010] Optionally, the obtaining the slope direction of the electric locomotive according to the positive or negative value of the inclination of the electric locomotive and the positive or negative value of the running of the electric locomotive comprises: S1031: when the positive or negative value of the inclination of the electric locomotive is the same as the positive or negative value of the running of the electric locomotive, the slope direction of the electric locomotive is uphill; S1032: when the positive or negative value of the inclination of the electric locomotive is opposite to the positive or negative value of the running of the electric locomotive, the slope direction of the electric locomotive is downhill.

[0011] Optionally, the obtaining the total weight of the electric locomotive according to the inclination of the electric locomotive, the slope direction of the electric locomotive and the tractive force of the electric locomotive comprises: S301: obtaining the gravitational acceleration of the electric locomotive; S302: obtaining the drag coefficient of the electric locomotive; S303: obtaining the slope of the electric locomotive according to the inclination of the electric locomotive, wherein the drag coefficient of the electric locomotive is positive when the slope direction of the electric locomotive is uphill, and the drag coefficient of the electric locomotive is negative when the slope direction of the electric locomotive is downhill; S304: multiplying the drag coefficient of the electric locomotive and the slope of the electric locomotive, and then multiplying the product by the gravitational acceleration of the electric locomotive, and dividing the tractive force of the electric locomotive by the multiplied product to obtain the total weight of the electric locomotive.

[0012] Optionally, the electric locomotive comprises a plurality of drive units, each drive unit comprising an electric motor and a wheel, the electric motor being in driving connection with the wheel; and the obtaining the traction force of the electric locomotive according to the torque comprises: S201, obtaining the output torque of the electric motor; S202, obtaining the speed reduction ratio of the electric motor to the wheel; S203, obtaining the radius of the wheel; S204, multiplying the output torque of the electric motor by the speed reduction ratio of the electric motor to the wheel and then dividing by the radius of the wheel to obtain the traction force of the drive unit; and S205, adding the traction forces of the plurality of drive units to obtain the traction force of the electric locomotive.

[0013] Optionally, the obtaining the loaded weight of the electric locomotive according to the total weight of the electric locomotive comprises: S401, obtaining the unloaded weight of the electric locomotive; and S402, subtracting the unloaded weight of the electric locomotive from the total weight of the electric locomotive to obtain the loaded weight of the electric locomotive.

[0014] Optionally, the detection method further comprises: S5, intermittently obtaining the loaded weight of the electric locomotive according to the input of an external signal when the slope direction of the electric locomotive is constant; S6, removing the maximum value and the minimum value from the plurality of loaded weights of the electric locomotive; and S7, calculating the average value of the remaining loaded weights of the electric locomotive to obtain the average loaded weight of the electric locomotive.

[0015] Optionally, after the average loaded weight of the electric locomotive is obtained, the detection method further comprises: S8, storing the average loaded weight of the electric locomotive; and S9, converting the average loaded weight of the electric locomotive into visual information for display.

[0016] The technical solutions provided by the present disclosure can include the following beneficial effects:

[0017] By obtaining the inclination angle and the torque of the electric locomotive and obtaining the loaded weight of the electric locomotive according to the inclination angle and the torque of the electric locomotive, the weight of the material after loading is detected, the error of the loaded weight detection is effectively reduced, the accuracy of the loaded weight detection result is improved, the construction is ensured to be efficient and safe, and at the same time, the whole method avoids setting a weighing sensor and other components on the electric locomotive, which not only effectively reduces the cost of the loaded weight detection of the electric locomotive, but also avoids the problems of low construction efficiency and high construction cost caused by replacing the weighing sensor.

[0018] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0020] Figure 1 is a flowchart of a method for detecting the loading weight of an electric locomotive according to an embodiment of the present disclosure;

[0021] Figure 2 is a structural diagram of the electric locomotive when climbing a slope in the method for detecting the loading weight of an electric locomotive according to an embodiment of the present disclosure;

[0022] Figure 3 is a structural diagram of the electric locomotive when descending a slope in the method for detecting the loading weight of an electric locomotive according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as a limitation of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0024] As shown in Figure 1 , the present disclosure provides a method for detecting the loading weight of an electric locomotive, comprising:

[0025] S1: obtaining the inclination angle of the electric locomotive, and obtaining the slope direction of the electric locomotive according to the inclination angle of the electric locomotive;

[0026] S2: obtaining the torque of the electric locomotive, and obtaining the traction force of the electric locomotive according to the torque;

[0027] S3: obtaining the total weight of the electric locomotive according to the inclination angle of the electric locomotive, the slope direction of the electric locomotive and the traction force of the electric locomotive;

[0028] S4: obtaining the loading weight of the electric locomotive according to the total weight of the electric locomotive.

[0029] It can be understood that by obtaining the inclination angle and torque of the electric locomotive, and obtaining the loading weight of the electric locomotive according to the inclination angle and torque of the electric locomotive, the weight detection after loading of the material is realized, the error of the loading weight detection is effectively reduced, the accuracy of the loading weight detection result is improved, and the construction is ensured to be efficient and safe.

[0030] At the same time, the whole method avoids setting components such as weighing sensors on the electric locomotive, not only effectively reducing the cost of the loading weight detection of the electric locomotive, but also avoiding the problem of low construction efficiency and high construction cost caused by replacing the weighing sensors.

[0031] It should be noted that an electric locomotive is a device that uses an electric motor to drive the wheels to rotate and uses the friction between the wheels and the rail surface to make the whole vehicle run on the track. The specific type of electric locomotive can be set according to actual needs and there is no limitation. For example, an electric locomotive may include a locomotive head and multiple dump trucks connected in sequence. The electric locomotive may also include multiple segment trucks and mortar trucks connected to the rear of the dump trucks.

[0032] The method for obtaining the locomotive's tilt angle can be set according to actual needs and is not limited in this regard. For example, the locomotive's tilt angle can be obtained through a tilt angle sensor. The tilt angle sensor is set in the locomotive's stable mechanical structure, ensuring that the tilt angle sensor can stably detect the tilt angle while avoiding the influence of the locomotive's working environment on the tilt angle sensor.

[0033] In some embodiments, S1, obtaining the slope direction of the electric locomotive based on its tilt angle includes:

[0034] S101: Obtain the positive and negative values ​​of the locomotive's tilt angle based on the locomotive's front and rear heights;

[0035] S102: Obtain the positive and negative values ​​of the locomotive's travel direction based on the locomotive's travel direction;

[0036] S103: Obtain the slope direction of the electric locomotive based on the positive and negative values ​​of its tilt angle and travel.

[0037] It is understandable that by obtaining the positive and negative values ​​of the locomotive's tilt angle and travel, the overall system can accurately determine the locomotive's slope direction based on these values, thereby accurately determining the locomotive's total weight and ultimately achieving accurate detection of the locomotive's loaded weight.

[0038] It should be noted that the relationship between the positive and negative values ​​of the locomotive's tilt angle and the height of the locomotive's front and rear can be set according to actual needs, and there are no restrictions on this. For example, when the height of the locomotive's front is greater than the height of its rear, the locomotive's tilt angle can be negative; when the height of the locomotive's front is less than the height of its rear, the locomotive's tilt angle can be positive.

[0039] In some embodiments, S101, obtaining the positive and negative values ​​of the locomotive's tilt angle based on the locomotive's front height and rear height includes:

[0040] S1011: When the height of the front of the electric locomotive is greater than the height of the rear of the electric locomotive, the tilt angle of the electric locomotive is a positive value;

[0041] S1012: When the height of the front of the electric locomotive is less than the height of the rear of the electric locomotive, the tilt angle of the electric locomotive is negative.

[0042] Understandably, the direction of the locomotive's tilt can be determined by the positive or negative value of its tilt angle, thus enabling the locomotive to quickly determine its slope and improve the efficiency of detecting the locomotive's loaded weight.

[0043] It should be noted that when the locomotive obtains its tilt angle using a tilt sensor, the tilt angle is set to zero degrees when the height of the locomotive's front is equal to the height of its rear, meaning the locomotive is in a level position. When the height of the locomotive's front is greater than the height of its rear, the tilt angle is set to a positive value. When the height of the locomotive's front is less than the height of its rear, the tilt angle is set to a negative value.

[0044] The relationship between the positive and negative values ​​of the locomotive's movement and its direction of travel can be set according to actual needs, and there are no restrictions on this. For example, when the locomotive is moving forward, the movement value can be negative, and when the locomotive is moving backward, the movement value can be positive.

[0045] In some embodiments, in S102, obtaining the positive or negative value of the electric locomotive's travel direction according to the locomotive's travel direction includes:

[0046] S1021: When the electric locomotive is moving forward, the locomotive's travel value is positive;

[0047] S1022: When the electric locomotive is moving backward, the locomotive's travel value is negative.

[0048] It is understandable that the direction of travel of the electric locomotive can be determined by the positive or negative value of its travel, thereby enabling the overall determination of the locomotive's slope and improving the efficiency of detecting the load weight of the electric locomotive.

[0049] It should be noted that the method for obtaining the locomotive's direction of travel can be set according to actual needs and is not limited thereto. For example, the locomotive is equipped with a control handle, which is used to control the locomotive's forward and backward movement. Thus, by detecting the forward and backward operation data of the control handle, the locomotive's direction of travel can be obtained, and thus the positive or negative value of the locomotive's movement can be obtained.

[0050] The forward direction of an electric locomotive refers to the direction from the rear to the front, while the backward direction refers to the direction from the front to the rear.

[0051] In some embodiments, S103, obtaining the slope direction of the electric locomotive based on the positive and negative values ​​of the locomotive's tilt angle and travel distance includes:

[0052] S1031: When the tilt angle of the electric locomotive is the same as the positive or negative value of the electric locomotive's travel, the slope of the electric locomotive is uphill.

[0053] S1032: When the tilt angle of the electric locomotive is opposite to the positive or negative value of the locomotive's travel, the locomotive's slope direction is downhill.

[0054] It is understandable that, such as Figure 2 As shown, when the locomotive's tilt angle and travel are both positive, it indicates that the locomotive's front height is greater than its rear height, and the locomotive is moving forward from its rear to its front. Therefore, the locomotive's slope direction is uphill. Conversely, when the locomotive's tilt angle and travel are both negative, it indicates that the locomotive's front height is less than its rear height, and the locomotive is moving backward from its front to its rear. Therefore, the locomotive's slope direction is uphill.

[0055] like Figure 3 As shown, when the locomotive's tilt angle is positive and its travel distance is negative, it indicates that the locomotive's front height is greater than its rear height, and the locomotive is moving backward from the front to the rear. Therefore, the locomotive's slope direction can be determined as downhill. Conversely, when the locomotive's tilt angle is negative and its travel distance is positive, it indicates that the locomotive's front height is less than its rear height, and the locomotive is moving forward from the rear to the front. Therefore, the locomotive's slope direction can be determined as downhill.

[0056] Therefore, by comparing the positive and negative values ​​of the locomotive's tilt angle with the positive and negative values ​​of its travel, the locomotive's slope direction can be quickly determined. Based on this slope direction, the locomotive's load weight can be quickly determined, thereby improving the efficiency of locomotive load weight detection.

[0057] In some embodiments, S3, obtaining the total weight of the electric locomotive based on its tilt angle, slope direction, and traction force includes:

[0058] S301: Obtain the gravitational acceleration of the electric locomotive;

[0059] S302: Obtain the drag coefficient of the electric locomotive;

[0060] S303: The gradient of the electric locomotive is obtained based on its tilt angle. When the locomotive is going uphill, the drag coefficient is positive, and when the locomotive is going downhill, the drag coefficient is negative.

[0061] S304: Add the locomotive's drag coefficient to the locomotive's gradient, multiply this by the locomotive's gravitational acceleration, and divide the locomotive's traction force by the product to obtain the locomotive's total weight.

[0062] Understandably, by calculating the relationship between the locomotive's gravitational acceleration, drag coefficient, gradient, and traction force, the total weight of the locomotive can be obtained accurately and efficiently. Based on the total weight of the locomotive, the load weight of the locomotive can be obtained, ensuring the efficiency and accuracy of locomotive load weight detection.

[0063] It should be noted that the gravitational acceleration of an electric locomotive is a constant. However, the gravitational acceleration varies slightly in different regions. Depending on the specific needs, the gravitational acceleration can be a commonly used fixed value or a more precise value can be calculated using other methods. There are no restrictions on this.

[0064] The resistance coefficient of an electric locomotive is a constant. Once the locomotive is manufactured, its resistance coefficient is determined. The method of obtaining the resistance coefficient can be set according to actual needs, and there are no restrictions on it. For example, the resistance coefficient can be calculated according to the specific specifications of the locomotive, referring to Section 2.4 of TBT1407-1998 Train Traction Calculation Procedure.

[0065] The method for obtaining the locomotive's gradient can be set according to actual needs, and there are no restrictions on it. For example, the gradient is the tangent of the tilt angle, and the locomotive's tilt angle has positive and negative values. Therefore, the locomotive's gradient is the tangent of the absolute value of the tilt angle.

[0066] To further clarify, when the electric locomotive is traveling uphill, the traction force F of the electric locomotive... j for:

[0067] F j =F i +F0;

[0068] Among them, F i F0 is the slope resistance of the electric locomotive, and F0 is the basic resistance of the electric locomotive.

[0069] The slope resistance F of the electric locomotive i for:

[0070] F i =Mgp;

[0071] Where M is the total weight of the electric locomotive, g is the acceleration due to gravity of the electric locomotive, and p is the gradient of the electric locomotive.

[0072] The basic resistance F0 of the electric locomotive is:

[0073] F0 = Mgz;

[0074] Where z is the drag coefficient of the electric locomotive.

[0075] Therefore, it can be deduced that when the electric locomotive is uphill, its total weight M is:

[0076]

[0077] When the electric locomotive is traveling downhill, the traction force F of the electric locomotive is... j for:

[0078] F j =F i -F0;

[0079] Therefore, it can be deduced that when the electric locomotive is on a downhill slope, its total weight M is:

[0080]

[0081] Where -z indicates that the drag coefficient of the electric locomotive is negative.

[0082] This shows that by calculating the relationship between locomotive gravitational acceleration, drag coefficient, gradient, and traction force, the total weight of the locomotive can be obtained accurately and efficiently.

[0083] In some embodiments, the electric locomotive includes a plurality of drive units, each drive unit including a motor and wheels, the motor being drivenly connected to the wheels;

[0084] In S2, the traction force of the electric locomotive is obtained based on the torque, including:

[0085] S201: Obtain the output torque of the motor;

[0086] S202: Obtain the reduction ratio from the motor to the wheel;

[0087] S203: Get the radius of the wheel;

[0088] S204: The traction force of the drive unit is obtained by multiplying the output torque of the motor by the reduction ratio from the motor to the wheel and then dividing by the radius of the wheel.

[0089] S205: The traction force of the electric locomotive is obtained by adding the traction forces of multiple drive units.

[0090] Understandably, by calculating the motor output torque, the motor-to-wheel reduction ratio, and the wheel radius, the traction force of the drive unit can be obtained accurately and efficiently. Thus, the traction force of the electric locomotive can be obtained based on the traction force of multiple drive units, and the load weight of the electric locomotive can be obtained based on the traction force of the electric locomotive, ensuring the efficiency and accuracy of the electric locomotive load weight detection.

[0091] It should be noted that the electric locomotive includes multiple drive units. The locomotive moves by the joint traction of multiple drive units. The method of obtaining the motor output torque can be set according to actual needs and is not limited. For example, the motor is equipped with a frequency converter, and the output torque of the motor is obtained by detecting the torque data in the frequency converter.

[0092] The reduction ratio from the motor to the wheels is a constant. Once the locomotive is manufactured, the reduction ratio from the motor to the wheels is also determined. The method for obtaining the reduction ratio from the motor to the wheels can be set according to actual needs, and there are no restrictions on it.

[0093] The radius of the wheel is a constant. Once the locomotive is manufactured, the radius of the wheels in the locomotive is also determined. The method of obtaining the wheel radius can be set according to actual needs, and there are no restrictions on it.

[0094] To further explain, the traction force F of the electric locomotive j for:

[0095]

[0096] Among them, T n It is the output torque of the motor in the nth drive unit, i n R is the reduction ratio from the motor to the wheel in the nth drive unit. n It is the radius of the wheel in the nth drive unit.

[0097] Therefore, it can be deduced that when the electric locomotive is uphill, its total weight M is:

[0098]

[0099] When the electric locomotive is moving downhill, its total weight M is:

[0100]

[0101] This shows that by calculating the motor output torque, the motor-to-wheel reduction ratio, and the wheel radius, the total weight of the electric locomotive can be obtained accurately and efficiently.

[0102] In some embodiments, S4, obtaining the load weight of the electric locomotive based on its total weight includes:

[0103] S401: Obtain the unloaded weight of the electric locomotive;

[0104] S402: Subtract the unloaded weight of the electric locomotive from its total weight to obtain the loaded weight of the electric locomotive.

[0105] Understandably, by subtracting the locomotive's unloaded weight from its total weight, the locomotive's loaded weight can be accurately obtained, thus ensuring efficient and safe construction.

[0106] It should be noted that the unloaded weight of an electric locomotive is a constant. Once the electric locomotive is manufactured, its unloaded weight is also determined. The method for obtaining the unloaded weight of the electric locomotive can be set according to actual needs, and there are no restrictions on it.

[0107] To further clarify, the total weight M of the electric locomotive is:

[0108] M = m1 + m2;

[0109] Where m1 is the unloaded weight of the electric locomotive, and m2 is the loaded weight of the electric locomotive.

[0110] Therefore, it can be deduced that when the electric locomotive is traveling uphill, the loaded weight m2 of the electric locomotive is:

[0111]

[0112] When the electric locomotive is traveling downhill, its loaded weight m2 is:

[0113]

[0114] In some embodiments, the detection method further includes:

[0115] S5: When the slope of the electric locomotive is constant, the load weight of the electric locomotive is obtained intermittently based on the input of external signals.

[0116] S6: Remove the maximum and minimum values ​​from the load weights of multiple electric locomotives;

[0117] S7: Calculate the average load weight of the remaining locomotives to obtain the average load weight of the locomotives.

[0118] Understandably, by repeatedly measuring the load weight of the electric locomotive and calculating the average value, while removing the maximum and minimum values ​​before calculating the average, the measurement error of the load weight of the electric locomotive can be effectively reduced, resulting in higher overall measurement accuracy and ensuring efficient and safe construction.

[0119] It should be noted that the input method of external signals can be set according to actual needs and is not restricted. For example, external signal input can be achieved through control buttons, including an on button and an off button. The on button is used to enable multiple load weight detections, and the off button is used to disable multiple load weight detections. The interval between pressing the on button and pressing the off button can be fixed or variable, and is not restricted.

[0120] In some embodiments, after obtaining the average loaded weight of the electric locomotive, the detection method further includes:

[0121] S8: Store the average load weight of the electric locomotive;

[0122] S9: Converts the average load weight of the locomotive into visual information for display.

[0123] Understandably, storing the average load weight of the locomotive facilitates the monitoring and analysis of the load weight during the locomotive's operation, ensuring efficient and safe construction. Converting and displaying the average load weight of the locomotive allows operators to intuitively observe the load weight, making the detection of the locomotive's load weight more convenient.

[0124] It should be noted that the average load weight of the locomotive can be stored through a recording unit. The specific type of the recording unit can be set according to actual needs and there are no restrictions on it. For example, the recording unit can be a memory.

[0125] The conversion and display of the average load weight of the electric locomotive can be achieved through a display unit. The specific type of display unit can be set according to actual needs and there are no restrictions on it. For example, the display unit can be a monitor.

[0126] The calculation of the load weight of the electric locomotive can be achieved through a control unit. The specific type of control unit can be set according to actual needs and is not limited thereto. For example, the control unit can be a computer. The computer is used to calculate the load weight of the electric locomotive based on the output torque of the motor, the reduction ratio from the motor to the wheels, the radius of the wheels, the gravitational acceleration of the electric locomotive, the drag coefficient of the electric locomotive, the tilt angle of the electric locomotive, the direction of travel of the electric locomotive, and the unloaded weight of the electric locomotive. The load weight of the electric locomotive is stored in the recording unit and displayed in the display unit.

[0127] The reduction ratio from the motor to the wheel, the wheel radius, the acceleration due to gravity of the locomotive, the drag coefficient of the locomotive, and the unloaded weight of the locomotive can be directly stored in the control unit. The acquisition of the motor output torque, the locomotive tilt angle, and the locomotive travel direction can be achieved through the acquisition unit. The acquisition unit collects the torque data of the frequency converter, the tilt angle data of the tilt angle sensor, and the operation data of the control handle and sends this data to the computer.

[0128] The frequency converter, tilt sensor, control handle, acquisition unit, control unit, recording unit, display unit, start button and stop button can communicate with each other via a field communication bus, which can be Modbus, Profibus, TCP / IP, Profinet, etc.

[0129] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0130] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0132] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for detecting the load weight of an electric locomotive, characterized in that, include: S1: Obtain the tilt angle of the electric locomotive, and obtain the slope direction of the electric locomotive based on the tilt angle of the electric locomotive; S2: Obtain the torque of the electric locomotive, and obtain the traction force of the electric locomotive based on the torque; S3: The total weight of the electric locomotive is obtained based on its tilt angle, slope direction, and traction force. S4: Obtain the load weight of the electric locomotive based on its total weight; The step of obtaining the slope direction of the electric locomotive based on its tilt angle includes: S101: obtaining the positive and negative values ​​of the tilt angle of the electric locomotive based on the height of the front of the electric locomotive and the height of the rear of the electric locomotive; S102: obtaining the positive and negative values ​​of the travel direction of the electric locomotive based on its travel direction; S103: obtaining the slope direction of the electric locomotive based on the positive and negative values ​​of the tilt angle and the positive and negative values ​​of the travel direction. The step of obtaining the positive or negative value of the tilt angle of the electric motor vehicle based on the height of the front of the electric motor vehicle and the height of the rear of the electric motor vehicle includes: S1011: when the height of the front of the electric motor vehicle is greater than the height of the rear of the electric motor vehicle, the tilt angle of the electric motor vehicle is positive; S1012: when the height of the front of the electric motor vehicle is less than the height of the rear of the electric motor vehicle, the tilt angle of the electric motor vehicle is negative. The step of obtaining the positive or negative value of the electric motor's movement based on its direction of travel includes: S1021: When the electric motor moves forward, its movement value is positive; S1022: When the electric motor moves backward, its movement value is negative. The step of obtaining the slope direction of the electric locomotive based on the positive and negative values ​​of its tilt angle and its travel includes: S1031: When the tilt angle and the travel value of the electric locomotive are the same, the slope direction of the electric locomotive is uphill; S1032: When the tilt angle and the travel value of the electric locomotive are opposite, the slope direction of the electric locomotive is downhill. The step of obtaining the total weight of the electric vehicle based on its tilt angle, slope, and traction force includes: S301: obtaining the gravitational acceleration of the electric vehicle; S302: obtaining the drag coefficient of the electric vehicle; S303: obtaining the slope of the electric vehicle based on its tilt angle, wherein the drag coefficient is positive when the slope is uphill and negative when the slope is downhill, and the slope is the tangent of the absolute value of the tilt angle; S304: adding the drag coefficient and the slope of the electric vehicle, multiplying this by the gravitational acceleration, and dividing the traction force of the electric vehicle by the product to obtain the total weight of the electric vehicle.

2. The method for detecting the load weight of an electric locomotive according to claim 1, characterized in that, The electric locomotive includes: multiple drive units, each drive unit including: a motor and wheels, the motor being drive-connected to the wheels; The process of obtaining the traction force of the electric locomotive based on the torque includes: S201: Obtain the output torque of the motor; S202: Obtain the reduction ratio from the motor to the wheel; S203: Obtain the radius of the wheel; S204: The traction force of the drive unit is obtained by multiplying the output torque of the motor by the reduction ratio from the motor to the wheel and then dividing by the radius of the wheel; S205: The traction force of the electric locomotive is obtained by adding the traction forces of the multiple drive units.

3. The method for detecting the loaded weight of an electric locomotive according to claim 1, characterized in that, The process of obtaining the load weight of the electric locomotive based on its total weight includes: S401: Obtain the unloaded weight of the electric locomotive; S402: Subtract the unloaded weight of the electric locomotive from its total weight to obtain the loaded weight of the electric locomotive.

4. The method for detecting the loaded weight of an electric locomotive according to any one of claims 1-3, characterized in that, The detection method further includes: S5: When the slope of the electric locomotive is constant, the load weight of the electric locomotive is obtained intermittently based on the input of external signals. S6: Remove the maximum and minimum values ​​from the multiple electric locomotive load weights; S7: Calculate the average load weight of the remaining electric locomotives to obtain the average load weight of the electric locomotives.

5. The method for detecting the load weight of an electric locomotive according to claim 4, characterized in that, After obtaining the average loaded weight of the electric locomotive, the detection method further includes: S8: Store the average load weight of the electric locomotive; S9: Convert the average load weight of the electric locomotive into visual information for display.

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