CN102798500B - System and method for testing barycenter of road roller steel wheel and vibration amplitude uniformity of road roller steel wheel - Google Patents

Abstract

The invention discloses a steel wheel center of mass and amplitude uniformity test system and method of a road roller. The system includes a steel wheel center of mass test system, a steel wheel amplitude uniformity test system, a hydraulic system and a control system; the steel wheel barycenter test system includes a leveling Oil cylinder, load cell, test platform, support wheel, level measuring instrument and angle sensor, steel wheel amplitude uniformity test system includes front frame support and acceleration sensor, control system includes microprocessor module, A/D conversion circuit module and human-computer interaction equipment; the method includes the steps of: testing the center of mass position of the steel wheel of the road roller: installation and leveling, collecting angle and pressure signals, determining and displaying the position of the center of mass of the steel wheel of the road roller; testing the uniformity of the amplitude of the steel wheel of the road roller: fixing, Acceleration signal acquisition, determination and display of roller drum amplitude deviation δ. The invention is novel and reasonable in design, convenient in use and operation, high in testing efficiency, high in precision, strong in practicability, and high in popularization and application value.

Description

Testing system and method for center of mass and amplitude uniformity of road roller steel wheel

technical field

The invention belongs to the technical field of mechanical engineering, and in particular relates to a testing system and method for the center of mass and amplitude uniformity of steel wheels of road rollers.

Background technique

The vibration amplitude of the vibratory roller is the key performance index of the roller, which directly affects the compaction quality of the road surface by the roller. The uniform amplitude in the wheel width direction is the most basic requirement to ensure the uniformity of compaction. When the amplitude deviation between the left and right sides of the vibratory wheel is large , It will also affect the straight running performance of the roller. After experimental research, the offset of the center of mass of the vibrating wheel is one of the main reasons that affect the uniformity of the amplitude of the roller. However, due to manufacturing and processing precision and other reasons, the center of mass of the steel wheel cannot be completely in the geometric center. In order to study the dynamics of the roller, it is necessary The precise location of the center of mass of the drum and the amplitude of its principal location are known. In the prior art, the amplitude uniformity of the steel wheel is usually measured through on-site tests after the complete machine is assembled. Vibrate under load and measure the amplitude of the steel wheel. When the amplitude is not uniform, it is difficult to achieve uniform amplitude by adjusting the center of mass of the steel wheel, and the process of measuring the amplitude of the road roller in the field test is relatively complicated. In the prior art, there is no device and method capable of directly detecting the centroid and amplitude of the steel wheel of the road roller before the complete machine is assembled.

Contents of the invention

The technical problem to be solved by the present invention is to provide a road roller steel wheel center of mass that is simple in structure, small in size, small in floor space, novel and reasonable in design, convenient in implementation, convenient in use and operation, and low in implementation cost in view of the deficiencies in the above-mentioned prior art. And amplitude uniformity test system.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a test system for the center of mass and amplitude uniformity of the steel wheel of the road roller. Fixed connection, the front frame of the road roller is equipped with a vibration motor used to drive the vibration shaft to vibrate, the output shaft of the vibration motor is connected to the vibration shaft; it is characterized in that the center of mass of the steel wheel of the road roller and the amplitude uniformity test system include steel Wheel centroid test system, steel wheel amplitude uniformity test system and hydraulic system, and a control system for analyzing and processing the test data of the steel wheel centroid test system and steel wheel amplitude uniformity test system and controlling the hydraulic system; The steel wheel center of mass testing system includes three leveling oil cylinders, three force sensors installed on the tops of the piston rods of the three leveling oil cylinders, and a test platform installed on the tops of the three force sensors. Two support wheels for supporting the steel wheel of the road roller are arranged symmetrically on the top, and a level measuring instrument for leveling the test platform and an angle sensor for measuring the rotation angle of the steel wheel of the road roller are arranged on the top of the test platform , the three described leveling oil cylinders and the three described load cells are arranged in a triangle ABC, and the triangle ABC is an isosceles triangle or an equilateral triangle; the hydraulic system is connected with the vibration motor and the leveling oil cylinder and is used for Hydraulic power is provided for the vibrating motor and the leveling oil cylinder. The steel wheel amplitude uniformity test system includes a front frame support for supporting the front frame of the road roller on its top and a front frame support installed on the steel wheel of the road roller and used to A plurality of acceleration sensors for detecting the vibration acceleration at different positions of the steel wheel, a plurality of acceleration sensors are evenly arranged on the steel wheel of the road roller along the axial direction of the steel wheel of the road roller; the control system includes a microprocessor Module and the A/D conversion circuit module connected with the microprocessor module and human-computer interaction equipment, a plurality of the load cell, the angle sensor and a plurality of the acceleration sensors are all connected with the A/D conversion circuit module is connected, and the hydraulic system is connected to the microprocessor module.

The above-mentioned system for testing the center of mass and amplitude uniformity of the steel wheel of the road roller is characterized in that the number of the acceleration sensors is three or five.

The above-mentioned test system for the center of mass and amplitude uniformity of the steel wheel of the road roller is characterized in that: the front frame of the road roller is equipped with a support plate of a vibration damping block, and the support plate of the vibration damping block is installed on the steel wheel of the road roller. The damping block between the above-mentioned damping block support plates.

The above-mentioned test system for the center of mass and amplitude uniformity of steel wheels of road rollers is characterized in that the hydraulic system includes an oil supply tank, an oil filter, and a hydraulic pump connected in sequence through oil pipes, and four solenoid valves connected with the hydraulic pump through oil pipes , where three solenoid valves are respectively connected to the three leveling oil cylinders, and the other solenoid valve is connected to the vibrating motor, and a relief valve is connected to the oil pipe connecting the oil filter and the hydraulic pump, and the relief valve passes through the oil pipe It is connected with the overflow oil tank; the hydraulic pump and the four solenoid valves are all connected with the microprocessor module.

The above-mentioned test system for the center of mass and amplitude uniformity of steel wheels of road rollers is characterized in that the solenoid valve is a three-position four-way solenoid valve.

The above-mentioned system for testing the center of mass and amplitude uniformity of steel wheels of road rollers is characterized in that: the human-computer interaction device is a touch-type liquid crystal display screen or a computer.

The present invention also provides a method for testing the center of mass and amplitude uniformity of steel wheels of road rollers with fast data processing speed, strong data processing capability, high precision and strong practicability, characterized in that the method comprises the following steps:

Step 1. Test the position of the center of mass of the steel wheel of the road roller. The specific process is as follows:

Step 101, installation and leveling: first, place the integrated road roller front frame, road roller steel wheel and vibration motor on the top of the front frame support, so that the road roller front frame is supported on the top of the front frame support , and make the steel wheel of the road roller supported on the top of the two supporting wheels; then, unscrew the bolts for fixedly connecting the steel wheel of the road roller and the front frame of the road roller, so that the steel wheel of the road roller can be positioned on the vibration axis Then, input the control parameters of the leveling oil cylinder on the human-computer interaction device, the microprocessor module receives the control parameters of the leveling oil cylinder and controls the hydraulic pump and the three solenoid valves connected to the three leveling oil cylinders Realize the control to the three described leveling oil cylinders, make the test platform horizontally located at the top of a plurality of the load cells;

Step 102. Acquisition of angle and pressure signals: first, the A/D conversion circuit module performs A/D conversion on the pressure signals detected by the three load cells to obtain three pressure values F _A ', F _B ' and F _C ', the three pressure values F _A ', F _B ' and F _C ' processed by the A/D conversion circuit module are collected by the microprocessor module; then, the steel wheel of the road roller Manually turn over the θ angle, and the A/D conversion circuit module performs A/D conversion on the rotation angle signal of the steel wheel of the road roller detected by the angle sensor and the pressure signals detected by the three load cells to obtain the angle value θ and three pressure values F _A , F _B and F _C , the angle value θ and three pressure values F _A , F _B and F _C processed by the A/D conversion circuit module are collected by the microprocessor module ;

Step 103. Determination of the position of the center of mass of the steel wheel of the road roller: the microprocessor module invokes the pressure and angle data processing module to process the three collected pressure values F _A ', F _B ' and F _C ', as well as the angle values θ and The three pressure values F _A , F _B and F _C are comprehensively analyzed and processed to obtain the position of the center of mass of the steel wheel of the road roller;

Step 104, displaying the position of the center of mass of the steel wheel of the road roller: the microprocessor module sends a display control signal to the human-computer interaction device, and the position of the center of mass of the steel wheel of the road roller determined in step 103 is displayed synchronously through the human-computer interaction device;

Step 2. Test the amplitude uniformity of the steel wheel of the road roller. The specific process is as follows:

Step 201, fixing: Screw on the bolts for fixedly connecting the steel wheel of the road roller to the front frame of the road roller, so that the steel wheel of the road roller is fixedly connected to the front frame of the road roller;

Step 202, collection of acceleration signals: input the vibration control parameters of the steel wheel of the road roller on the human-computer interaction device, and the microprocessor module receives the vibration control parameters of the steel wheel of the road roller and controls the hydraulic pump and the electromagnetic valve connected to the vibration motor Realize the control of the vibration of the steel wheel of the road roller; at the same time, the vibration acceleration signals at different positions of the steel wheel of the road roller detected by the multiple acceleration sensors are A/D converted by the A/D conversion circuit module to obtain multiple accelerations values a ₁ , a ₂ ,...,a _i , and then the microprocessor module collects the acceleration values a ₁ , a ₂ ,...,a _i processed by the A/D conversion circuit module, where i is the The number of accelerometers;

Step 203. Determination of the amplitude deviation δ of the steel wheel of the road roller: the microprocessor module invokes the acceleration data processing module to conduct comprehensive analysis and processing on the multiple acceleration values a ₁ , a ₂ , ..., a _i collected to obtain the Roller drum amplitude deviation δ;

Step 204 , displaying the amplitude deviation δ of the steel wheel of the road roller: the microprocessor module sends a display control signal to the human-computer interaction device, and the human-computer interaction device synchronously displays the amplitude deviation δ of the steel wheel of the road roller determined in step 203 .

The above-mentioned method is characterized in that: the microprocessor module in step 103 calls the pressure and angle data processing module to collect the three pressure values F _A ', F _B ' and F _C ', and the angle values θ and The three pressure values F _A , F _B and F _C are subjected to comprehensive analysis and processing, and the comprehensive processing and analysis process includes the following steps:

Step 1031, establish a spatial rectangular coordinate system: the microprocessor module takes the midpoint of the base BC of the triangle ABC as the origin of coordinates, and takes the base BC of the triangle ABC as the X axis to be perpendicular to the triangle ABC The height of the base BC is the Y axis, and the straight line passing through the origin of the coordinates and perpendicular to the plane where the triangle ABC is located is the Z axis to establish a space Cartesian coordinate system;

Step 1032, the microprocessor module calls the pressure and angle data processing module and according to the formula: $\left\{\begin{array}{c}{x}_g=\frac{h-Y_g}{\sqrt{3}}-\frac{2f_B}{\sqrt{3}(f_A+f_B+f_C)}\\ Y_g=\frac{f_A*h}{f_A+f_B+f_C}\\ Z_g=\frac{Y_g\cos \mathrm{\θ}-\frac{{f_A}^{\′}\×h}{f_A+f_B+f_C}}{\sin \mathrm{\θ}}\end{array}\right.,$ The pressure value F _A ' detected and processed by the load cell before the steel wheel of the road roller turns over the angle θ, and the angle value θ detected and processed by the angle sensor after the steel wheel of the road roller turns over the angle θ and the processed pressure values F _A , F _B and F _C detected by the three load cells are transformed into the position coordinates of the center of mass of the steel wheel of the road roller (X _g , Y _g , Z _g ), where H is the The waist triangle or the height of the equilateral triangle, _FA ' is the pressure signal detected by the load cell at the vertex A of the triangle ABC before the steel wheel of the road roller turns over the angle θ through the A/D conversion circuit module The pressure value obtained after processing, θ is the angle that the steel wheel of the road roller has turned and is the angle value obtained after the angle value detected by the angle sensor is processed by the A/D conversion circuit module, F _A , F _B and F _C is obtained after the pressure signals detected by the three load cells at the vertices A, B and C of the triangle ABC after the steel wheel of the road roller has rotated through the angle θ are processed by the A/D conversion circuit module Three pressure values.

The above-mentioned method is characterized in that: the microprocessor module in step 203 calls the acceleration data processing module to perform comprehensive analysis and processing on the collected multiple acceleration values a ₁ , a ₂ ,..., a _i is as follows: The microprocessor module calls the acceleration data processing module and according to the formula $\mathrm{\δ}=\frac{|\max (a_1,a_2,\·\·\·,a_i)-\min (a_1,a_2,\&Center\; Dot;\&Center\; Dot;\&Center\; Dot;,a_i)|}{\mathrm{AVG}(a_1,a_2,\·\·\&Center\; Dot;,a_i)}\×100\%,$ Converting the acceleration signals detected and processed by the multiple acceleration sensors into the roller drum amplitude deviation δ, where max(a ₁ , a ₂ ,...,a _i ) is a plurality of acceleration values a ₁ , a ₂ , …, the maximum value in a _i , min(a ₁ ,a ₂ ,…,a _i ) is the minimum value among multiple acceleration values a ₁ , a ₂ ,…,a _i , AVG(a ₁ ,a ₂ , ..., a _i ) is the average value of multiple acceleration values a ₁ , a ₂ ,..., a _i .

The above method is characterized in that: the value of i is 3 or 5.

Compared with the prior art, the present invention has the following advantages:

1. The center of mass and amplitude uniformity test system of the road roller steel wheel of the present invention has a simple overall structure, small volume, and small floor space. It can test the center of mass and amplitude uniformity of the steel wheel of the road roller in any place. The design is novel and reasonable, and it is convenient to implement.

2. The use and operation of the present invention are convenient, the center of mass and amplitude uniformity test of the steel wheel of the road roller is high in efficiency, and the display results are intuitive.

3. The present invention can directly detect the center of mass and amplitude uniformity of the steel wheel of the road roller before the whole machine is assembled, and can accurately know the precise position of the center of mass of the steel wheel of the road roller and the amplitude of its main position, which is convenient for dynamic research on the road roller.

4. The present invention has strong practicability, low implementation cost, and helps to propose improvement measures, thereby improving the operation quality of the road roller, good use effect, and high value for popularization and application.

To sum up, the present invention is novel and reasonable in design, convenient in implementation, convenient in use and operation, high in efficiency, high in precision, strong in practicability, low in implementation cost, good in use effect, and high in popularization and application value.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the center of mass and amplitude uniformity test system of the steel wheel of the road roller according to the present invention.

Fig. 2 is a structural schematic diagram of a steel wheel center of mass testing system and a steel wheel amplitude uniformity testing system of the present invention.

Fig. 3 is a left side view of Fig. 2 .

Fig. 4 is a schematic diagram of the connection relationship between the hydraulic system and the vibrating motor and the leveling oil cylinder of the present invention.

Fig. 5 is a schematic diagram of the connection relationship between the control system of the present invention and other components.

Fig. 6 is a flow chart of the method for testing the center of mass and amplitude uniformity of the steel wheel of the road roller according to the present invention.

Explanation of reference signs:

1—leveling cylinder; 2—load sensor; 3—test platform;

4—level measuring instrument; 5—angle sensor; 6—support wheel;

7—front frame support; 8—front roller frame; 9—vibration damping block;

10—road roller steel wheel; 11—acceleration sensor; 12—vibration motor;

13—vibration damping block support plate; 14—microprocessor module; 15—A/D conversion circuit module;

16—human-computer interaction equipment; 17—hydraulic system; 18—fuel supply tank;

19—oil filter; 20—hydraulic pump; 21—solenoid valve;

22—overflow valve; 23—overflow oil tank.

Detailed ways

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, in the test system for the center of mass and amplitude uniformity of the steel wheel of the road roller according to the present invention, the steel wheel of the road roller 10 is installed on the front frame 8 of the road roller through the vibrating shaft and passed Bolts are fixedly connected with the front frame 8 of the road roller, and a vibration motor 12 for driving the vibration of the vibration shaft is installed on the front frame 8 of the road roller, and the output shaft of the vibration motor 12 is connected with the vibration shaft; the present invention includes steel wheel centroid testing system, a steel wheel amplitude uniformity testing system and a hydraulic system 17, and a control system for analyzing and processing the test data of the steel wheel center of mass testing system and the steel wheel amplitude uniformity testing system and controlling the hydraulic system 17; The steel wheel center of mass test system includes three leveling cylinders 1, three force sensors 2 installed on the tops of the piston rods of the three leveling cylinders 1, and a test platform 3 installed on the tops of the three force sensors 2. The top of the test platform 3 is symmetrically provided with two support wheels 6 for supporting the steel wheel 10 of the road roller, and the top of the test platform 3 is provided with a level measuring instrument 4 for leveling the test platform 3 and for adjusting the road roller. The angle sensor 5 for measuring the rotation angle of the steel wheel 10, the three described leveling oil cylinders 1 and the three described load cells 2 are all arranged in a triangle ABC, and the triangle ABC is an isosceles triangle or an equilateral triangle; The hydraulic system 17 is connected with the vibrating motor 12 and the leveling cylinder 1 and is used to provide hydraulic power for the vibrating motor 12 and the leveling cylinder 1. The front frame support 7 at its top and a plurality of acceleration sensors 11 installed on the steel wheel 10 of the road roller and used to detect the vibration acceleration at different positions of the steel wheel 10 of the road roller, a plurality of acceleration sensors 11 along the The axial direction of the roller steel wheel 10 is evenly arranged on the roller steel wheel 10; the control system includes a microprocessor module 14 and an A/D conversion circuit module 15 connected with the microprocessor module 14 and human-computer interaction Equipment 16, a plurality of said load cell 2, said angle sensor 5 and a plurality of said acceleration sensors 11 are all connected with said A/D conversion circuit module 15, and said hydraulic system 17 is connected with said microprocessor Modules 14 are connected.

In this embodiment, the number of the acceleration sensors 11 is three or five. A shock absorber support plate 13 is installed on the front frame 8 of the road roller, and a shock absorber between the roller steel wheel 10 and the shock absorber support plate 13 is installed on the shock absorber support plate 13 9.

4, in this embodiment, the hydraulic system 17 includes an oil supply tank 18, an oil filter 19 and a hydraulic pump 20 connected in sequence through oil pipes, and four electromagnetic valves 21 connected with the hydraulic pump 20 through oil pipes, wherein The three solenoid valves 21 are respectively connected to the three leveling oil cylinders 1, and the other solenoid valve 21 is connected to the vibrating motor 12, and the oil pipe connecting the oil filter 19 and the hydraulic pump 20 is connected with a relief valve 22. The overflow valve 22 is connected to the overflow oil tank 23 through the oil pipe; the hydraulic pump 20 and the four solenoid valves 21 are all connected to the microprocessor module 14 .

In this embodiment, the solenoid valve 21 is a three-position four-way solenoid valve. The input port of the three-position four-way solenoid valve is connected to the output port of the hydraulic pump 20 through the oil pipe. When the three-position four-way solenoid valve is connected to the leveling oil cylinder 1, the two output ports of the three-position four-way solenoid valve are respectively Correspondingly connected with the oil inlet and oil return port of the leveling cylinder 1 through the oil pipe; when the three-position four-way solenoid valve is connected with the vibration motor 12, the two output ports of the three-position four-way solenoid valve correspond It is connected with the oil inlet and the oil return port of the vibration motor 12 .

In this embodiment, the human-computer interaction device 16 is a touch-type liquid crystal display screen or a computer.

In conjunction with Fig. 6, the method for testing the center of mass and amplitude uniformity of steel wheels of road rollers according to the present invention comprises the following steps:

Step 1. Test the position of the center of mass of the drum 10 of the road roller. The specific process is as follows:

Step 101, installation and leveling: first, place the integrated road roller front frame 8, road roller steel wheel 10 and vibrating motor 12 on the top of the front frame support 7, so that the road roller front frame 8 is supported on the front The top of the frame support 7, and the roller steel wheel 10 is supported on the two tops of the support wheels 6; then, the bolts for fixedly connecting the roller steel wheel 10 and the front roller frame 8 are unscrewed, so that the The steel wheel 10 of the road roller can rotate on the vibration shaft; then, input the control parameters of the leveling oil cylinder 1 on the human-computer interaction device 16, and the microprocessor module 14 receives the control parameters of the leveling oil cylinder 1 and controls the hydraulic pump 20 and three solenoid valves 21 connected to the three leveling cylinders 1 realize the control of the three leveling cylinders 1, so that the test platform 3 is horizontally located on the top of a plurality of load cells 2; Since the top of the test platform 3 is provided with a level measuring instrument 4 for leveling the test platform 3, the level of the test platform 3 can be manually judged by the data displayed by the level measuring instrument 4, when the operator When the level is not satisfactory, the control parameters of the leveling cylinder 1 can be input again on the human-computer interaction device 16, and the test platform 3 can be leveled again.

Step 102. Acquisition of angle and pressure signals: first, the A/D conversion circuit module 15 performs A/D conversion on the pressure signals detected by the three load cells 2 to obtain three pressure values F _A ', F _B ' and F _C ', the microprocessor module 14 collects the three pressure values F _A ', F _B ' and F _C ' processed by the A/D conversion circuit module 15; then, the The steel wheel 10 of the road roller is manually rotated through the θ angle, and the rotation angle signal of the steel wheel 10 of the road roller detected by the angle sensor 5 and the pressure detected by the three load cells 2 are detected by the A/D conversion circuit module 15. The signal is A/D converted to obtain the angle value θ and three pressure values F _A , F _B and F _C , and the angle value θ and the three pressure values processed by the A/D conversion circuit module 15 are processed by the microprocessor module 14 Values F _A , F _B and F _C are collected;

Step 103, determining the position of the center of mass of the steel wheel 10 of the road roller: the microprocessor module 14 invokes the pressure and angle data processing module to process the collected three pressure values F _A ', F _B ' and F _C ', and the angle value θ and the three pressure values F _A , F _B and F _C are comprehensively analyzed and processed to obtain the position of the center of mass of the steel wheel 10 of the road roller;

In this embodiment, the microprocessor module 14 in step 103 invokes the pressure and angle data processing module to analyze the collected three pressure values F _A ', F _B ' and F _C ', as well as the angle value θ and the three The pressure values F _A , F _B and F _C are subjected to comprehensive analysis and processing, and the comprehensive processing and analysis process includes the following steps:

Step 1031, establish a spatial rectangular coordinate system: the microprocessor module 14 takes the midpoint of the base BC of the triangle ABC as the origin of coordinates, and takes the base BC of the triangle ABC as the X axis, so as to be perpendicular to the triangle The height of the ABC base BC is the Y axis, and the straight line passing through the coordinate origin and perpendicular to the plane where the triangle ABC is located is the Z axis to establish a space Cartesian coordinate system;

Step 1032, the microprocessor module 14 calls the pressure and angle data processing module and according to the formula: $\left\{\begin{array}{c}{x}_g=\frac{h-Y_g}{\sqrt{3}}-\frac{2f_B}{\sqrt{3}(f_A+f_B+f_C)}\\ Y_g=\frac{f_A*h}{f_A+f_B+f_C}\\ Z_g=\frac{Y_g\cos \mathrm{\θ}-\frac{{f_A}^{\′}\×h}{f_A+f_B+f_C}}{\sin \mathrm{\θ}}\end{array}\right.,$ The pressure value F A ′ detected and processed by the load cell 2 before the roller steel wheel 10 rotates through the θ angle, and the pressure value F _A ′ detected and processed by the angle sensor 5 after the roller steel wheel 10 rotates through the θ angle The processed angle value θ and the processed pressure values F _A , F _B and F _C detected by the three load cells 2 are converted into the position coordinates X _g , Y _g , Z _g of the center of mass of the drum 10 of the road roller, where , H is the height of the isosceles triangle or the equilateral triangle, F _A ' is the pressure signal detected by the load cell 2 at the vertex A of the triangle ABC before the roller 10 turns through the angle θ The pressure value obtained after being processed by the A/D conversion circuit module 15, θ is the angle at which the steel wheel 10 of the road roller has turned and is the angle value detected by the angle sensor 5 through the A/D conversion circuit module 15 The angle values obtained after processing, F _A , F _B and F _C are respectively obtained by the three load cells 2 located at the vertices A, B and C of the triangle ABC after the steel wheel 10 of the road roller has rotated through the angle θ. Three pressure values are obtained after the detected pressure signal is processed by the A/D conversion circuit module 15 .

Step 104, displaying the position of the center of mass of the steel wheel 10 of the road roller: the microprocessor module 14 sends a display control signal to the human-computer interaction device 16, and the position of the center of mass of the steel wheel 10 of the road roller determined in step 103 is carried out by the human-computer interaction device 16 Synchronous display;

Step 2. Test the amplitude uniformity of the steel wheel 10 of the road roller. The specific process is as follows:

Step 201, fixing: screw on the bolts used to fixedly connect the steel wheel 10 of the road roller to the front frame 8 of the road roller, so that the steel wheel 10 of the road roller is fixedly connected to the front frame 8 of the road roller;

Step 202, collection of acceleration signals: input the vibration control parameters of the steel wheel 10 of the road roller on the human-computer interaction device 16, and the microprocessor module 14 receives the vibration control parameters of the steel wheel 10 of the road roller and controls the hydraulic pump 20 and the vibration The solenoid valve 21 connected to the motor 12 realizes the vibration control of the roller steel wheel 10; at the same time, the vibration acceleration at different positions of the roller steel wheel 10 detected by the A/D conversion circuit module 15 is detected by the multiple acceleration sensors 11. A/D conversion is performed on the signal to obtain multiple acceleration values a ₁ , a ₂ , ..., a _i , and then the microprocessor module 14 processes the acceleration values a ₁ , a ₂ , ..., a _i is collected, wherein, i is the quantity of the acceleration sensor 11;

Step 203. Determination of the amplitude deviation δ of the steel wheel 10 of the road roller: the microprocessor module 14 invokes the acceleration data processing module to conduct comprehensive analysis and processing on the collected multiple acceleration values a ₁ , a ₂ , ..., a _i to obtain The amplitude deviation δ of the steel wheel 10 of the road roller;

In this embodiment, the process for the microprocessor module 14 in step 203 to call the acceleration data processing module to perform comprehensive analysis and processing on the collected multiple acceleration values a ₁ , a ₂ ,..., a _i is: the micro Processor module 14 calls described acceleration data processing module and according to formula $\mathrm{\δ}=\frac{|\max (a_1,a_2,\&Center\; Dot;\&Center\; Dot;\&Center\; Dot;,a_i)-\min (a_1,a_2,\&Center\; Dot;\&Center\; Dot;\&Center\; Dot;,a_i)|}{\mathrm{AVG}(a_1,a_2,\·\·\·,a_i)}\×100\%,$ converting the acceleration signals detected and processed by the plurality of acceleration sensors 11 into the amplitude deviation δ of the steel wheel 10 of the road roller, where max(a ₁ , a ₂ ,...,a _i ) is a plurality of acceleration values a ₁ , a ₂ ,…,a _i is the maximum value, min(a ₁ ,a ₂ ,…,a _i ) is the minimum value among multiple acceleration values a ₁ ,a ₂ ,…,a _i , AVG(a ₁ ,a ₂ , ..., a _i ) is the average value of multiple acceleration values a ₁ , a ₂ , ..., a _i . Specifically, in this embodiment, the value of i is 3 or 5.

Step 204, display of the amplitude deviation δ of the roller steel wheel 10: the microprocessor module 14 sends a display control signal to the human-computer interaction device 16, and the human-computer interaction device 16 controls the amplitude deviation of the road roller steel wheel 10 determined in step 203 δ for synchronous display.

Through the position of the center of mass of the steel wheel 10 of the road roller and the amplitude deviation δ of the steel wheel 10 displayed on the human-computer interaction device 16, the operator can clearly know whether the center of mass of the steel wheel 10 of the road roller has deviated from the geometric center, and can know that the steel wheel of the road roller The degree to which the center of mass of the wheel 10 deviates from the geometric center can also understand the uniformity of the amplitude of the steel wheel 10 of the road roller, and can judge the degree of influence of the position deviation of the center of mass of the steel wheel 10 of the road roller on the uniformity of the amplitude of the steel wheel 10 of the road roller, which helps to propose Improvement measures to improve the operation quality of the road roller.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (10)

1. a road roller steel wheel center of mass and amplitude uniformity testing system, said road roller steel wheel (10) is installed on the road roller front vehicle frame (8) by a vibration shaft and is fixedly connected with the road roller front vehicle frame (8) by bolts, A vibration motor (12) for driving the vibration shaft to vibrate is installed on the front frame (8) of the road roller, and the output shaft of the vibration motor (12) is connected to the vibration shaft; The uniformity test system includes a steel wheel centroid test system, a steel wheel amplitude uniformity test system and a hydraulic system (17), and is used for analyzing and processing the test data of the steel wheel centroid test system and the steel wheel amplitude uniformity test system and used for A control system for controlling the hydraulic system (17); the steel wheel center of mass testing system includes three leveling oil cylinders (1), respectively corresponding to three load cells installed at the tops of the piston rods of the three leveling oil cylinders (1) (2) and the test platform (3) installed on the top of three load cells (2), the top of the test platform (3) is symmetrically provided with two support wheels (6) for supporting the roller steel wheel (10) ), the top of the test platform (3) is provided with a level measuring instrument (4) for leveling the test platform (3) and an angle sensor (5) for measuring the rotation angle of the roller steel wheel (10) ), three described leveling oil cylinders (1) and three described force sensors (2) are all arranged in a triangle ABC, and the triangle ABC is an isosceles triangle or an equilateral triangle; the hydraulic system (17) and The vibration motor (12) is connected with the leveling oil cylinder (1) and is used to provide hydraulic power for the vibration motor (12) and the leveling oil cylinder (1). (8) the front frame support (7) supported on its top and a plurality of acceleration sensors installed on the steel wheel (10) of the road roller and used to detect the vibration acceleration at different positions of the steel wheel (10) of the road roller ( 11), a plurality of the acceleration sensors (11) are evenly arranged on the steel wheel of the road roller (10) along the axial direction of the steel wheel of the road roller (10); the control system includes a microprocessor module (14) And the A/D conversion circuit module (15) and the human-computer interaction device (16) connected with the microprocessor module (14), a plurality of said load cells (2), said angle sensors (5) and a plurality of Each of the acceleration sensors (11) is connected to the A/D conversion circuit module (15), and the hydraulic system (17) is connected to the microprocessor module (14). 2. The test system for center of mass and amplitude uniformity of roller steel wheels according to claim 1, characterized in that: the number of said acceleration sensors (11) is three or five. 3. The center of mass and amplitude uniformity testing system for steel wheels of road rollers according to claim 1, characterized in that: a shock absorber support plate (13) is installed on the front frame (8) of the road roller, and the shock absorber A vibration damping block (9) located between the roller steel wheel (10) and the vibration damping block support plate (13) is installed on the support plate (13). 4. The center of mass and amplitude uniformity test system for steel wheels of road rollers according to claim 1, characterized in that: the hydraulic system (17) includes an oil supply tank (18), an oil filter (19) connected in sequence through oil pipes And the hydraulic pump (20), and four solenoid valves (21) connected with the hydraulic pump (20) through oil pipes, of which three solenoid valves (21) are respectively connected with three leveling cylinders (1), and the other solenoid valve The valve (21) is connected with the vibrating motor (12), and the oil pipe connecting the oil filter (19) and the hydraulic pump (20) is connected with an overflow valve (22), and the overflow valve (22) is connected to the oil pipe through the oil pipe. The overflow oil tank (23) is connected; the hydraulic pump (20) and the four electromagnetic valves (21) are all connected with the microprocessor module (14). 5. The test system for the center of mass and amplitude uniformity of steel wheels of road rollers according to claim 4, characterized in that: the solenoid valve (21) is a three-position four-way solenoid valve. 6. The test system for the center of mass and amplitude uniformity of steel wheels of road rollers according to claim 1, characterized in that: the human-computer interaction device (16) is a touch-type liquid crystal display or a computer. 7. A method for testing the center of mass and the amplitude uniformity of the steel wheel of the road roller by utilizing the center of mass of the steel wheel of the road roller as claimed in claim 4 and the uniformity of amplitude testing system, it is characterized in that the method comprises the following steps: Step 1. Test the position of the center of mass of the steel wheel (10) of the road roller. The specific process is as follows: Step 101, installation and leveling: First, place the integrated road roller front frame (8), road roller steel wheel (10) and vibrating motor (12) on the top of the front frame support (7), so that the front of the road roller The frame (8) is supported on the top of the front frame support (7), and the roller steel wheel (10) is supported on the top of the two support wheels (6); The bolts of the steel wheel (10) and the road roller front frame (8) are unscrewed, so that the road roller steel wheel (10) can rotate on the vibration shaft; then, input leveling oil cylinder (1) control parameters, the microprocessor module (14) receives the leveling oil cylinders (1) control parameters and controls the hydraulic pump (20) and three solenoid valves connected with the three described leveling oil cylinders (1) The valve (21) controls the three leveling oil cylinders (1), so that the test platform (3) is horizontally located on the top of a plurality of load cells (2); Step 102. Acquisition of angle and pressure signals: first, the A/D conversion circuit module (15) performs A/D conversion on the pressure signals detected by the three load cells (2) to obtain three Pressure values F _A ', F _B ' and F _C ', the three pressure values F _A ', F _B ' and F _C processed by the A/D conversion circuit module (15) are processed by the microprocessor module (14) 'collect; then, the roller steel wheel (10) is manually turned over the θ angle, and the rotation of the roller steel wheel (10) detected by the angle sensor (5) by the A/D conversion circuit module (15) The angle signal and the pressure signals detected by the three load cells (2) are A/D converted to obtain the angle value θ and three pressure values F _A , F _B and F _C , which are controlled by the microprocessor module (14 ) collecting the angle value θ and three pressure values F _A , F _B and F _C processed by the A/D conversion circuit module (15); Step 103. Determination of the position of the center of mass of the steel wheel (10) of the road roller: the microprocessor module (14) calls the pressure and angle data processing module to process the three collected pressure values F _A ', F _B ' and F _C ' , and the angle value θ and three pressure values _FA , F _B and _FC carry out comprehensive analysis and processing to obtain the centroid position of the steel wheel (10) of the road roller; Step 104, display of the position of the center of mass of the steel wheel (10) of the road roller: the microprocessor module (14) sends a display control signal to the human-computer interaction device (16), and the human-computer interaction device (16) determines the position of the center of mass in step 103 Synchronously display the position of the center of mass of the steel wheel (10) of the road roller; Step 2. Test the amplitude uniformity of the steel wheel (10) of the road roller. The specific process is as follows: Step 201, fixing: Screw on the bolts for fixedly connecting the steel wheel (10) of the road roller to the front frame (8) of the road roller, so that the steel wheel (10) of the road roller is fixedly connected to the front frame (8) of the road roller superior; Step 202, collection of acceleration signals: input the vibration control parameters of the steel wheel of the road roller (10) on the human-computer interaction device (16), and the microprocessor module (14) receives the vibration control parameters of the steel wheel of the road roller (10) and passes the control The hydraulic pump (20) and the electromagnetic valve (21) connected with the vibration motor (12) realize the control of the vibration of the roller drum (10); meanwhile, the A/D conversion circuit module (15) The vibration acceleration signals at different positions of the steel wheel (10) of the road roller (10) detected by multiple acceleration sensors (11) are A/D converted to obtain multiple acceleration values a ₁ , a ₂ ,..., a _i , and then the micro The processor module (14) collects the acceleration values a ₁ , a ₂ ,..., a _i processed by the A/D conversion circuit module (15), wherein, i is the number of the acceleration sensors (11) ; Step 203. Determination of the amplitude deviation δ of the steel wheel (10) of the road roller: the microprocessor module (14) invokes the acceleration data processing module to analyze the multiple acceleration values a ₁ , a ₂ ,..., a _i Carry out comprehensive analysis and processing to obtain the amplitude deviation δ of the road roller steel wheel (10); Step 204, the display of the amplitude deviation δ of the steel wheel (10) of the road roller: the microprocessor module (14) sends a display control signal to the human-computer interaction device (16), and the human-computer interaction device (16) determines in step 203 The amplitude deviation δ of the steel wheel (10) of the road roller is displayed synchronously. 8. The method according to claim 7, characterized in that: the microprocessor module (14) in step 103 invokes the pressure and angle data processing module to process the collected three pressure values F _A ', F _B ' and F _C ', as well as the angle value θ and the three pressure values F _A , F _B and F _C for comprehensive analysis and processing, and the comprehensive processing and analysis process includes the following steps: Step 1031, establish a space Cartesian coordinate system: the microprocessor module (14) takes the midpoint of the base BC of the triangle ABC as the origin of coordinates, and takes the base BC of the triangle ABC as the X axis, perpendicular to the The height of the base BC of the triangle ABC is the Y axis, and the straight line passing through the origin of the coordinates and perpendicular to the plane where the triangle ABC is located is the Z axis to establish a space Cartesian coordinate system; Step 1032, the microprocessor module (14) calls the pressure and angle data processing module and according to the formula: $\left\{\begin{array}{c}{x}_g=\frac{h-Y_g}{\sqrt{3}}-\frac{{2f}_B}{\sqrt{3}(f_A+f_B+f_C)}\\ Y_g=\frac{f_A*h}{f_A+f_B+f_C}\\ Z_g=\frac{Y_g\cos \mathrm{\θ}-\frac{{f_A}^{\′}\×h}{f_A+f_B+f_C}}{\sin \mathrm{\θ}}\end{array}\right.,$ The pressure value F A ' detected and processed by the load cell (2) before turning the roller steel wheel (10) through the θ angle, and the pressure value F _A ' after the roller steel wheel (10) turns through the angle θ The angle value θ detected and processed by the angle sensor (5) and the pressure values _FA , F _B and F _C detected and processed by the three load cells (2) are converted into the center of mass of the road roller steel wheel (10) Position coordinates (X _g , Y _g , Z _g ), wherein, H is the height of the isosceles triangle or the equilateral triangle, and F _A ' is the location where the steel wheel (10) of the road roller (10) is located before turning through the angle θ. The pressure signal detected by the load cell (2) at the vertex A of the triangle ABC is the pressure value obtained after the A/D conversion circuit module (15) is processed, and θ is the pressure value that the steel wheel (10) of the road roller has turned over. angle and is the angle value obtained after the angle value detected by the angle sensor (5) is processed by the A/D conversion circuit module (15), and F _A , F _B and F _C are respectively the steel wheels of the road roller (10 ) is obtained after the pressure signals detected by the three load cells (2) at the vertices A, B and C of the triangle ABC are processed by the A/D conversion circuit module (15) after turning the angle θ Three pressure values. 9. The method according to claim 7, characterized in that: the microprocessor module (14) in step 203 invokes the acceleration data processing module to process the collected acceleration values a ₁ , a ₂ ,  … , the process of carrying _out comprehensive analysis and processing is: the microprocessor module (14) calls the acceleration data processing module and according to the formula $\mathrm{\δ}=\frac{|\max (a_1,a_2,\·\·\&Center\; Dot;,a_i)-\min (a_1,a_2,\&Center\; Dot;\&Center\; Dot;\·{,a}_i)|}{\mathrm{AVG}(a_1,a_2,\&Center\; Dot;\·\&Center\; Dot;,a_i)}\×100\%$ The acceleration signals detected and processed by multiple acceleration sensors (11) are converted into the amplitude deviation δ of the steel wheel of the road roller (10), where max(a ₁ , a ₂ ,...,a _i ) is a plurality of The maximum value of acceleration values a ₁ , a ₂ ,...,a _i , min(a ₁ ,a ₂ ,...,a _i ) is multiple acceleration values a ₁ ,a ₂ ,...,a The minimum value in _i , AVG(a ₁ , a ₂ ,...,a _i ) is the average value of multiple acceleration values a ₁ , a ₂ ,...,a _i . 10. The method according to claim 7 or 9, characterized in that: the value of i is 3 or 5.