Average speed and deceleration measuring system of agricultural machinery

Abstract

The utility model discloses an average speed and deceleration measuring system of an agricultural machine, particularly relates to the technical field of mechanical testing, and aims to solve the problems that the real-time speed and deceleration of the agricultural machine in the prior art need to be manually operated, and are tedious, low in accuracy and the like. The top of each portal frame is provided with an LED screen, a photoelectric switch and a signal lamp. An operation pavilion is arranged on one side of the test runway, an industrial personal computer is arranged in the measurement pavilion and provided with an upper computer module, a satellite navigation system is arranged on the agricultural machine, and the industrial personal computer is in signal connection with the satellite navigation system, the LED screen, the photoelectric switch and the signal lamp. And the industrial personal computer can control the display of the LED screen and the color switching of the signal lamp according to the monitoring signal of the photoelectric switch. According to the utility model, the measurement precision of the agricultural machinery speed test can be improved, the working intensity of operators is reduced, and the operation process is automatic, intelligent and informationized.

Description

Technical Field

[0001] The utility model relates to an average speed and deceleration measurement system for agricultural machinery, belonging to the technical field of machinery testing. Background Art

[0002] At present, in order to implement the innovation-driven development and rural revitalization strategy in depth and promote agricultural machinery scientific and technological innovation and mechanism innovation, we need to focus on improving the construction level and management quality of agricultural machinery equipment and technology innovation platforms, and strive to promote agricultural mechanization to move towards comprehensive and high-quality development.

[0003] With the increasing types of agricultural tractors and the continuous increase in the number of tractors in use, agricultural practitioners are enjoying the great convenience brought by tractors. While strengthening education for agricultural practitioners and raising their awareness of the safety of agricultural machinery use, it is also necessary to conduct regular inspections of agricultural mechanized equipment.

[0004] The traditional method of speed / deceleration measurement of agricultural machinery at the appraisal station is extremely dependent on manual labor. Operators are required to hold stopwatches and tape measures, and manually time the start and stop of agricultural tractors on the corresponding runway, and then calculate the average speed of the agricultural tractor by dividing the distance by the time. When measuring deceleration, the operator manually brakes when the agricultural tractor reaches the maximum speed, and the driver reads the speed value on the dashboard, and then manually measures the braking distance, and calculates the deceleration based on the formula v2=2ax. The entire measurement operation process has a low degree of automation and intelligence, and relies on manual timing and manual measurement by operators. The measurement accuracy and traceability are poor, and there is a certain degree of danger. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an average speed and deceleration measurement system for agricultural machinery, so as to improve measurement accuracy, reduce the workload of operators, and make the operation process automated, intelligent, and information-based.

[0006] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0007] In a first aspect, the utility model provides an average speed and deceleration measurement system for agricultural machinery, including a test track, wherein four gantries are provided on the test track, and the four gantries are respectively gantry A, gantry B, gantry C and gantry D, and an operation booth is provided on one side of the test track, and an industrial control computer is provided in the operation booth;

[0008] The agricultural machinery is equipped with a satellite navigation system, and the satellite navigation system is used to monitor the real-time speed of the agricultural machinery;

[0009] The top of the gantry is equipped with an LED screen, and the side is equipped with a photoelectric switch and a signal light. The photoelectric switch is used to monitor the moment when the agricultural machinery passes through the gantry, the LED screen is used to display the action prompts of the agricultural machinery and its real-time speed, and the signal light is used to prompt the action of the agricultural machinery;

[0010] The industrial computer is electrically connected to the satellite navigation system, LED screen, photoelectric switch and signal light. The photoelectric switch can transmit the monitoring signal to the industrial computer, and the industrial computer can control the LED screen display and the color switching of the signal light according to the monitoring signal of the photoelectric switch.

[0011] Optionally, the signal lights include red and green lights and yellow lights, the red and green lights are arranged on gantry A and gantry D, and the yellow lights are arranged on gantry B and gantry C.

[0012] Optionally, the satellite navigation system includes a satellite navigation antenna and a data transmission module, the data transmission module includes a satellite navigation receiver, a radio transmission unit and a charging power supply, the satellite navigation antenna is used to receive satellite data and transmit it to the satellite navigation receiver, the satellite navigation receiver is electrically connected to the radio transmission unit for processing the satellite data and transmitting it to an industrial computer via the radio transmission unit, and the charging power supply is connected to the satellite navigation receiver and the radio transmission unit via a cable.

[0013] Optionally, the satellite navigation system includes a satellite navigation antenna and a data transmission module, the data transmission module includes a satellite navigation receiver, a radio transmission unit and a charging power supply, the satellite navigation antenna is used to receive satellite data and transmit it to the satellite navigation receiver, the satellite navigation receiver is electrically connected to the radio transmission unit for processing the satellite data and transmitting it to an industrial computer via the radio transmission unit, and the charging power supply is connected to the satellite navigation receiver and the radio transmission unit via a cable.

[0014] Optionally, the satellite data includes real-time speed of the agricultural machinery.

[0015] Optionally, the gantry is provided with an electrical cabinet, which contains a data acquisition card and a solid-state relay. The data acquisition card is connected to the electrical signal of the photoelectric switch and is connected to the industrial computer through a cable. The data acquisition card can transmit the monitoring signal of the photoelectric switch to the industrial computer; the solid-state relay is connected to the electrical signal of the signal light, and the industrial computer can switch the color of the signal light by controlling the on and off of the fixed relay according to the monitoring signal of the photoelectric switch.

[0016] Optionally, it also includes a camera arranged on the top of the gantry B and the gantry C, the camera is connected to the industrial computer through a cable, and the industrial computer can control the opening and closing of the camera according to the monitoring signal of the photoelectric switch.

[0017] Optionally, the industrial computer is configured with a host computer module, which includes a setting unit, a speed measurement unit, a deceleration measurement unit and a real-time monitoring unit. The setting unit is used to set the data acquisition card, signal light, LED screen, and satellite navigation system to ensure normal communication. The speed measurement unit is used to process and display the real-time speed data of the agricultural machinery. The deceleration measurement unit is used to process the real-time speed data of the agricultural machinery to obtain and display the deceleration. The real-time monitoring unit is used to set the camera and store the captured images.

[0018] Optionally, the photoelectric switch is arranged 1.6 m away from the bottom of the gantry.

[0019] Optionally, the length of the test runway is 80 m, the distance between the gantry A and the gantry B is 30 m, the distance between the gantry B and the gantry C is 20 m, and the distance between the gantry C and the gantry D is 30 m.

[0020] In a second aspect, the utility model provides a method for measuring the average speed of agricultural machinery, which is implemented by the average speed and deceleration measurement system of agricultural machinery described in any one of the above items, and comprises:

[0021] The photoelectric switch, signal light, LED screen and satellite navigation system are set through the setting unit to ensure normal system communication, so that the initial state of the traffic light is red and the initial state of the yellow light is off;

[0022] The speed measurement unit is used to set an LED screen to display the entry operation signal, and the traffic light turns green. At this time, the agricultural machinery enters from one end of the test track;

[0023] During the driving process of agricultural machinery, the satellite navigation system transmits the real-time speed of agricultural machinery to the industrial computer;

[0024] When the agricultural machinery passes through gantry A, the photoelectric switch on gantry A is triggered, and the industrial computer switches the traffic light to red light according to the monitoring signal of the photoelectric switch on gantry A, and displays the real-time speed of the agricultural machinery on the LED screen;

[0025] When the agricultural machinery passes through gantry B, the photoelectric switch on gantry B is triggered, and the industrial computer starts the camera on gantry C to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch on gantry B;

[0026] When the agricultural machinery passes through the gantry C, the photoelectric switch on the gantry C is triggered, and the industrial computer starts the camera on the gantry B to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch on the gantry C;

[0027] When the agricultural machinery passes through the gantry D, the photoelectric switch on the gantry D is triggered, and the industrial computer sets the LED screen to display the stop measurement operation according to the monitoring signal of the photoelectric switch on the gantry D;

[0028] The industrial computer intercepts the real-time speed data segment of the agricultural machinery passing through the gantry between time A and time D, performs filtering on the real-time speed data segment, removes obvious outliers in the real-time speed data segment, and then obtains the average speed of the agricultural machinery by averaging the real-time speed data segment.

[0029] In a third aspect, the utility model provides a method for measuring the average deceleration of agricultural machinery, which is implemented by the average speed and deceleration measurement system of agricultural machinery described in any one of the above items, and comprises:

[0030] The photoelectric switch, signal light, LED screen and satellite navigation system are set through the setting unit to ensure normal system communication and make the initial state of the traffic light red and the initial state of the yellow light off;

[0031] The speed measurement unit is used to set an LED screen to display the entry operation signal, and the traffic light turns green. At this time, the agricultural machinery enters from one end of the test track;

[0032] During the driving process of agricultural machinery, the satellite navigation system transmits the real-time speed of agricultural machinery to the industrial computer;

[0033] When the agricultural machinery passes through gantry A, the photoelectric switch on gantry A is triggered, and the industrial computer switches the traffic light to red light according to the monitoring signal of the photoelectric switch on gantry A, and displays the real-time speed of the agricultural machinery on the LED screen;

[0034] When the agricultural machinery passes through gantry B, the photoelectric switch on gantry B is triggered. The industrial computer starts the camera on gantry C to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch on gantry B, and sets the LED screen on gantry C to display the brake operation signal and starts the yellow light on gantry C. At this time, the agricultural machinery starts the brake operation;

[0035] When the agricultural machinery passes through the gantry C, the photoelectric switch on the gantry C is triggered, and the industrial computer starts the camera on the gantry B to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch on the gantry C;

[0036] When the agricultural machinery passes through the gantry D, the photoelectric switch on the gantry D is triggered. The industrial control computer sets the LED screen to display the stop measurement operation according to the monitoring signal of the photoelectric switch on the gantry D, or when the satellite navigation system monitors that the real-time speed of the agricultural machinery is less than the preset threshold, the measurement stops;

[0037] The industrial control computer intercepts the real-time speed data segment of the agricultural machinery between the moment passing through gantry A and the moment passing through gantry D, filters the real-time speed data segment, and eliminates the obvious outliers in the real-time speed data segment to obtain the processed real-time speed data segment;

[0038] Find the data points where the speed starts to decline in the processed real-time speed data segment, including:

[0039] a. Calculate the average value v1 of the data segment between data point a + i and data point a + i + 9, and calculate the average value v2 of the data segment between data point a + i + 1 and data point a + i + 10, where i = 0 and a is the starting point of the processed real-time speed data segment;

[0040] b. If v1 - v2 ≥ T (T is the set threshold), it means that the data point where the data starts to decline is in the data segment between data point a + i + 1 and data point a + i + 10. Take the data point a + i + 10 as the data point where the speed declines, and re-intercept one-third of the data segment from data point a + i + 10 to the end of the real-time speed data segment as the new data segment. Perform linear fitting on the new data segment to obtain the slope of the straight line, which is the deceleration. If v1 - v2 < T, then set i = i + 1 and repeat a to b until v1 - v2 ≥ T.

[0041] Compared with the prior art, the beneficial effects achieved by the present utility model are:

[0042] The measurement system provided by the present utility model can conveniently measure the average speed and deceleration of agricultural machinery, effectively reducing the labor input and improving the automation and intelligence of the entire measurement operation process;

[0043] The present utility model monitors the real-time speed of agricultural machinery through the satellite navigation system and combines the differential module to perform differential processing on satellite data, making the obtained real-time speed of agricultural machinery more accurate. Then, through data processing, obvious outlier data points are removed, and the data segment where the speed declines can be accurately found, thereby improving the measurement accuracy of the average speed and deceleration. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the average speed and deceleration measurement system of agricultural machinery in an embodiment of the present utility model;

[0045] Figure 2This is a schematic diagram of the signal transmission structure of an average speed and deceleration measurement system of agricultural machinery in one embodiment of the utility model;

[0046] Figure 3 It is a schematic flow chart of a method for measuring the average speed of agricultural machinery in one embodiment of the utility model;

[0047] Figure 4 A schematic flow chart of a method for measuring deceleration of agricultural machinery in one embodiment of the utility model;

[0048] In the figure: 1 satellite navigation system, 2 test track, 3 gantry, 4 LED screen, 5 signal light, 6 photoelectric switch, 7 electrical cabinet, 8 operation booth, 9 industrial computer, 10 support rod, 11 differential module, 12 camera, 13 data acquisition card, 14 solid-state relay, 15 satellite navigation antenna, 16 satellite navigation receiver, 17 charging power supply, 18 control card, 19 radio transmission unit. DETAILED DESCRIPTION

[0049] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example 1

[0052] like Figure 1 and Figure 2As shown, the embodiment of the utility model provides an average speed and deceleration measurement system for agricultural machinery, including a test track 2, on which four gantries 3 are arranged, and the four gantries 3 are respectively gantry A, gantry B, gantry C and gantry D. An operating booth 8 is arranged on one side of the test track 2, and an industrial computer 9 is arranged in the operating booth 8.

[0053] In this embodiment, the length of the test track 2 is 80 m, the distance between the gantry A and the gantry B is 30 m, the distance between the gantry B and the gantry C is 20 m, and the distance between the gantry C and the gantry D is 30 m.

[0054] A signal light 5 and a photoelectric switch 6 are provided on the side of the gantry 3. The photoelectric switch 6 is used to monitor the moment when the agricultural machinery passes through the gantry 3. The photoelectric switch 6 is set 1.6m away from the bottom of the gantry 3. The signal light 5 is powered by 220V AC and is used to prompt the agricultural machinery to move. In this embodiment, the signal lights 5 on the gantry A and the gantry B are red and green lights, and the signal lights 5 on the gantry C and the gantry D are yellow lights.

[0055] The industrial computer 9 is connected to the photoelectric switch 6 and the signal light 5 through the data acquisition card 13 and the solid-state relay 14 respectively to realize electrical signal connection. The side of the gantry 3 is provided with an electrical cabinet 7, and the data acquisition card 13 and the solid-state relay 14 are arranged in the electrical cabinet 7.

[0056] The photoelectric switch 6 is powered by a 24v DC power supply, and its signal is collected by the data acquisition card 13 through the RS485 protocol. The data acquisition card 13 communicates with the industrial computer 9 through a USB cable, and the data acquisition card 13 can transmit the monitoring signal of the photoelectric switch 6 to the industrial computer 9. The signal light 5 is powered by a 220v AC power supply, and the industrial computer 9 controls the on and off of the solid-state relay 14 through the DO port of the data acquisition card to switch the color state of the signal light 5.

[0057] In some embodiments, both the gantry B and the gantry C are provided with a camera 12, which is used to capture real-time images of the agricultural machinery during its travel. The camera 12 is connected to the industrial computer 9 via a cable, and the industrial computer 9 can control the opening and closing of the camera 12 according to the monitoring signal of the photoelectric switch 6.

[0058] In this embodiment, an LED screen 4 is also provided on the top of the gantry 3. The LED screen 4 is powered by 220V AC and is used to display the action prompts of the agricultural machinery and its real-time speed. The action prompts of the agricultural machinery include "start measurement", "deceleration measurement starts, please drive in", "please step on the brake" and "measurement ends", etc. In this embodiment, the LED screen 4 can also display the system name, i.e., "agricultural machinery average speed / deceleration measurement system".

[0059] The LED screen 4 is controlled by its matching control card 18 , and the control card 18 establishes communication with the industrial computer 9 via a network cable, so that the industrial computer 9 can control the display content on the LED screen 4 according to the monitoring signal of the photoelectric switch 6 .

[0060] The agricultural machinery is equipped with a satellite navigation system 1, which is used to monitor the real-time speed of the agricultural machinery. The satellite navigation system 1 includes a satellite navigation antenna 15 and a data transmission module. The data transmission module includes a satellite navigation receiver 16, a radio transmission unit 19 and a charging power supply 17. The satellite navigation antenna 15 is used to receive satellite data and transmit it to the satellite navigation receiver 16. The satellite navigation receiver 16 and the radio transmission unit 19, as well as the radio transmission unit and the industrial computer 9 are connected through RS232 protocol electrical signals, which are used to process the satellite data and transmit it to the industrial computer 9 through the radio transmission unit 19. The charging power supply 17 is connected to the satellite navigation receiver 16 and the radio transmission unit 19 through a cable. The charging power supply 17 is used to provide power for the satellite navigation receiver 16 and the radio transmission unit 19. In this embodiment, the satellite navigation system 1 uses a GNSS system.

[0061] In some embodiments, a differential module 11 is also included. The differential module 11 is arranged on one side of the operating booth 8 through a support rod 10. The differential module 11 is used to receive satellite data and perform differential processing on it to obtain differentially processed satellite data. The satellite navigation receiver 16 can receive the differentially processed satellite data, and integrate it with the satellite data and transmit it to the satellite navigation receiver 16 for data processing, and finally transmit it to the industrial computer 9. This can effectively improve the accuracy of the satellite data.

[0062] The above satellite data are the real-time speeds of agricultural machinery.

[0063] In some embodiments, the industrial computer 9 is equipped with a host computer module, which includes a setting unit, a speed measurement unit, a deceleration measurement unit, and a real-time monitoring unit. The setting unit is used to set the photoelectric switch 6, the signal light 5, the LED screen 4, and the satellite navigation system 1 to ensure normal communication, the speed measurement unit is used to process and display the real-time speed data of the agricultural machinery, the deceleration measurement unit is used to process the real-time speed data of the agricultural machinery to obtain the deceleration and display it, and the real-time monitoring unit is used to set the camera and store the captured image. Example 2

[0064] like Figure 3 As shown, based on Example 1, this embodiment further provides a method for measuring the average speed of agricultural machinery, comprising the following steps:

[0065] The photoelectric switch 6, signal light 5, LED screen 4, and satellite navigation system 1 are set through the setting unit of the industrial computer 9 to ensure normal system communication, so that the initial state is that the traffic light is red, the yellow light is off, and the LED screen 4 displays "Agricultural Machinery Speed / Deceleration Measurement System".

[0066] The speed measurement unit of the industrial computer 9 is used to set the LED screen 4 to display the entry operation signal, that is, "speed measurement starts, please enter". At the same time, the traffic light turns green. At this time, the driver observes the signals of the LED screen 4 and the traffic light and starts the agricultural machinery to enter from one end of the test runway 2. It should be noted that the agricultural machinery can enter from either end, but the operation must correspond to the gantry 3. In this embodiment, it enters from the left side.

[0067] During the driving process of the agricultural machinery, the satellite navigation system 1 and the differential module 11 transmit the real-time speed of the agricultural machinery to the industrial computer 9 .

[0068] When the agricultural machinery passes through the gantry A, the photoelectric switch 6 on the gantry A is triggered, and the industrial computer 9 converts the traffic light into a red light according to the monitoring signal of the photoelectric switch 6 on the gantry A, and displays the real-time speed of the agricultural machinery on the LED screen 4, that is, "the system is measuring, v=xx km / h".

[0069] When the agricultural machinery passes through the gantry B, the photoelectric switch 6 on the gantry B is triggered, and the industrial computer 9 starts the camera 12 on the gantry C to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch 6 on the gantry B.

[0070] When the agricultural machinery passes through the gantry C, the photoelectric switch 6 on the gantry C is triggered, and the industrial computer 9 starts the camera 12 on the gantry B to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch 6 on the gantry C.

[0071] When the agricultural machinery passes through the gantry D, the photoelectric switch 6 on the gantry D is triggered, and the industrial computer 9 sets the LED screen 4 to display the stop measurement operation according to the monitoring signal of the photoelectric switch 6 on the gantry D.

[0072] The speed measurement unit of the industrial computer 9 intercepts the real-time speed data segment of the agricultural machinery passing through the gantry A moment and the gantry D moment, filters the real-time speed data segment, removes obvious outliers in the real-time speed data segment, and then calculates the average value of the real-time speed data segment to obtain the average speed of the agricultural machinery.

[0073] The average speed is displayed in the speed measurement unit. Example 3

[0074] like Figure 4As shown, based on Example 1, this embodiment further provides a method for measuring the average deceleration of agricultural machinery, comprising the following steps:

[0075] The photoelectric switch 6, signal light 5, LED screen 4 and satellite navigation system 1 are set through the setting unit of the industrial computer 9 to ensure normal system communication and make the initial state of the traffic light red and the initial state of the yellow light off.

[0076] The speed measuring unit of the industrial computer 9 is used to set the LED screen 4 to display the entry operation signal and the traffic light is changed to a green light. At this time, the driver starts the agricultural machinery and enters from one end of the test track 2 after observing the signals of the LED screen 4 and the traffic light.

[0077] During the driving process of the agricultural machinery, the satellite navigation system 1 and the differential module 11 transmit the real-time speed of the agricultural machinery to the industrial computer 9 .

[0078] When the agricultural machinery passes through the gantry A, the photoelectric switch 6 on the gantry A is triggered, and the industrial computer 9 converts the traffic light to a red light according to the monitoring signal of the photoelectric switch 6 on the gantry A, and displays the real-time speed of the agricultural machinery on the LED screen 4.

[0079] When the agricultural machinery passes through the gantry B, the photoelectric switch 6 on the gantry B is triggered, and the industrial computer 9 starts the camera 12 on the gantry C to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch 6 on the gantry B, and sets the LED screen 4 on the gantry C to display the brake operation signal, and starts the yellow light on the gantry C. At this time, the driver starts the agricultural machinery and starts the braking operation after seeing the LED screen 4 and the yellow light on the gantry C.

[0080] When the agricultural machinery passes through the gantry C, the photoelectric switch 6 on the gantry C is triggered. The industrial computer 9 starts the camera 12 on the gantry B to capture the real-time image of the agricultural machinery according to the monitoring signal of the photoelectric switch 6 on the gantry C. The real-time image is stored in the real-time monitoring unit.

[0081] When the agricultural machinery passes through the gantry D, the photoelectric switch 6 on the gantry D is triggered, and the industrial computer 9 sets the LED screen to display the stop of the measurement operation according to the monitoring signal of the photoelectric switch 6 on the gantry D, or the satellite navigation system 1 detects that the real-time speed of the agricultural machinery is less than the preset threshold, and the measurement stops.

[0082] The deceleration measurement unit of the industrial computer 9 intercepts the real-time speed data segment of the agricultural machinery passing through the gantry A moment and the gantry D moment, and the real-time speed data segment is filtered to remove obvious outliers in the real-time speed data segment to obtain the processed real-time speed data segment.

[0083] Find the data point where the data starts to decline in the processed real-time speed data segment, including:

[0084] a. Calculate the average value v1 of the data segment between data point a + i and data point a + i + 9, and calculate the average value v2 of the data segment between data point a + i + 1 and data point a + i + 10, where i = 0 and a is the starting point of the processed real-time speed data segment;

[0085] b. If v1 - v2 ≥ T, where T is a set threshold, it means that the data point where the data starts to decline is in the data segment between data point a + i + 1 and data point a + i + 10. Take the data point a + i + 10 as the data point where the data declines. Re-intercept one-third of the data segment from data point a + i + 10 to the end of the real-time speed data segment as the new data segment, and perform a linear fit on the new data segment. The slope of the line obtained is the deceleration. If v1 - v2 < T, then set i = i + 1 and repeat a to b until v1 - v2 ≥ T.

[0086] The deceleration is displayed in the deceleration measurement unit.

[0087] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An average speed and deceleration measurement system for agricultural machinery, characterized in that: A test runway is included, and four gantries are arranged on the test runway, namely, gantry A, gantry B, gantry C and gantry D. An operation booth is arranged on one side of the test runway, and an industrial computer is arranged in the operation booth; The agricultural machinery is equipped with a satellite navigation system, and the satellite navigation system is used to monitor the real-time speed of the agricultural machinery; The top of the gantry is equipped with an LED screen, and the side is equipped with a photoelectric switch and a signal light. The photoelectric switch is used to monitor the moment when the agricultural machinery passes through the gantry, the LED screen is used to display the action prompts of the agricultural machinery and its real-time speed, and the signal light is used to prompt the action of the agricultural machinery; The industrial computer is electrically connected to the satellite navigation system, LED screen, photoelectric switch and signal light. The photoelectric switch can transmit the monitoring signal to the industrial computer, and the industrial computer can control the LED screen display and the color switching of the signal light according to the monitoring signal of the photoelectric switch.

2. The average speed and deceleration measurement system of agricultural machinery according to claim 1, characterized in that: The signal lights include red and green lights and yellow lights. The red and green lights are arranged on gantry A and gantry D, and the yellow lights are arranged on gantry B and gantry C.

3. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: The satellite navigation system includes a satellite navigation antenna and a data transmission module. The data transmission module includes a satellite navigation receiver, a radio transmission unit and a charging power supply. The satellite navigation antenna is used to receive satellite data and transmit it to the satellite navigation receiver. The satellite navigation receiver is electrically connected to the radio transmission unit and is used to process the satellite data and transmit it to an industrial computer via the radio transmission unit. The charging power supply is connected to the satellite navigation receiver and the radio transmission unit via a cable.

4. The average speed and deceleration measurement system for agricultural machinery according to claim 3, characterized in that: It also includes a differential module, which is arranged on one side of the operating booth through a support rod. The differential module is used to receive satellite data and perform differential processing on it to obtain differentially processed satellite data. The satellite navigation receiver can receive the differentially processed satellite data and merge it with the satellite data.

5. The average speed and deceleration measurement system for agricultural machinery according to claim 4, characterized in that: The satellite data includes the real-time speed of the agricultural machinery.

6. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: The gantry is provided with an electrical cabinet, which is equipped with a data acquisition card and a solid-state relay. The data acquisition card is connected to the electrical signal of the photoelectric switch and is connected to the industrial computer through a cable. The data acquisition card can transmit the monitoring signal of the photoelectric switch to the industrial computer; the solid-state relay is connected to the electrical signal of the signal light, and the industrial computer can switch the color of the signal light by controlling the on and off of the fixed relay according to the monitoring signal of the photoelectric switch.

7. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: It also includes cameras arranged on the top of the gantry B and the gantry C. The cameras are connected to the industrial computer through cables. The industrial computer can control the opening and closing of the cameras according to the monitoring signals of the photoelectric switches.

8. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: The industrial computer is configured with a host computer module, which includes a setting unit, a speed measurement unit, a deceleration measurement unit and a real-time monitoring unit. The setting unit is used to set the data acquisition card, the signal light, the LED screen, and the satellite navigation system to ensure normal communication. The speed measurement unit is used to process and display the real-time speed data of the agricultural machinery. The deceleration measurement unit is used to process the real-time speed data of the agricultural machinery to obtain the deceleration and display it. The real-time monitoring unit is used to set the camera and store the captured images.

9. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: The photoelectric switch is located 1.6m away from the bottom of the gantry.

10. The average speed and deceleration measurement system for agricultural machinery according to claim 1, characterized in that: The length of the test track is 80 m, the distance between the gantry A and the gantry B is 30 m, the distance between the gantry B and the gantry C is 20 m, and the distance between the gantry C and the gantry D is 30 m.

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