A constant speed regulation control method and aerial work platform

Abstract

The invention discloses a constant speed regulation control method and an aerial work platform, and relates to the field of aerial work technology. The constant speed regulation control method comprises: establishing a configuration table consisting of motor speeds and currents corresponding to each hydraulic oil temperature range during the operation of the aerial work platform; obtaining the current hydraulic oil temperature of the aerial work platform, and transmitting the hydraulic oil temperature signal to the control unit; the control unit retrieves the motor speed and current values ​​corresponding to the hydraulic oil temperature in the configuration table, and controls the speed of the power device to reach the motor speed, adjusts the valve core opening of the control valve, and makes the current of the actuator reach the current value; controls the actuator to perform an action; obtains the hydraulic oil temperature of the aerial work platform again after an interval setting time, and cyclically executes the step of "transmitting the hydraulic oil temperature signal to the control unit". The method can achieve that the operating speed of the actuator is basically consistent under different hydraulic oil temperature conditions, and improves the stability and reliability of the operation.

Description

Technical Field

[0001] The present invention relates to the field of aerial work technology, and more specifically, to a constant speed regulation control method and also to an aerial work platform using the constant speed regulation control method. Background Art

[0002] In the prior art, in actual operation of an aerial work platform, an operator generally lifts the aerial work platform to a certain height to carry out the operation. After a period of time, the platform is moved to another location to carry out the operation. During the period when the operator is carrying out the operation, the aerial work platform does not move and is in a dormant state. That is, the aerial work platform is generally operated intermittently in actual use. However, during the operation of the aerial work platform, the hydraulic pump does not operate continuously, and the temperature of the hydraulic oil is greatly affected by the environment, which affects the operating speed of the actuator of the aerial work platform, resulting in a large difference in the operating speed of the actuator in summer and winter, resulting in poor operational stability and reliability of the aerial work platform.

[0003] In summary, how to achieve that the operating speed of the actuator can be kept basically consistent under different temperatures of the hydraulic oil and improve the stability and reliability of the operation is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a constant speed regulation control method, which can achieve that the operating speed of the actuator can be kept basically consistent under different temperatures of the hydraulic oil, thereby improving the stability and reliability of the operation.

[0005] Another object of the present invention is to provide an aerial work platform using the above-mentioned constant speed regulation control method.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A constant speed regulation control method, comprising:

[0008] Establish a configuration table consisting of motor speed and current corresponding to each hydraulic oil temperature range during the operation of the aerial work platform;

[0009] Acquire the current hydraulic oil temperature of the aerial work platform, and transmit the hydraulic oil temperature signal to the control unit;

[0010] The control unit retrieves the motor speed and current value corresponding to the hydraulic oil temperature in the configuration table, controls the speed of the power unit to reach the motor speed, and adjusts the valve core opening of the control valve so that the current of the actuator reaches the current value;

[0011] Controlling the actuator to perform an action;

[0012] After a set interval time, the hydraulic oil temperature of the aerial work platform is obtained again, and the step of "transmitting the hydraulic oil temperature signal to the control unit" is executed cyclically.

[0013] In one embodiment, the configuration table of motor speed and current corresponding to each temperature range during the operation of the aerial work platform is established, including:

[0014] By collecting test data, a configuration table is established to form the motor speed and the current value corresponding to the standard action speed within each hydraulic oil temperature range during the operation of the aerial work platform, and the configuration table is stored in the control unit.

[0015] In one embodiment, obtaining the current hydraulic oil temperature of the aerial work platform and transmitting the hydraulic oil temperature signal to the control unit includes:

[0016] After the aerial work platform is turned on, the detection sensor detects the hydraulic oil temperature of the hydraulic oil tank and transmits the current hydraulic oil temperature data to the control unit.

[0017] An aerial work platform, applying any of the above-mentioned constant speed adjustment control methods, comprising:

[0018] Power plant;

[0019] A hydraulic pump connected to an output shaft of the power device;

[0020] An actuator, which is connected to the oil outlet of the hydraulic pump through a connecting pipe, and the connecting pipe is provided with a control valve;

[0021] A hydraulic oil tank connected to the oil inlet of the hydraulic pump, wherein the hydraulic oil tank is provided with a detection sensor, and the detection sensor is used to detect the current hydraulic oil temperature of the aerial work platform;

[0022] A control unit, the power unit, the hydraulic pump, the control valve, the detection sensor and the actuator are all connected to the control unit, the control unit is used to obtain the current hydraulic oil temperature detected by the detection sensor, call the motor speed and current value corresponding to the current hydraulic oil temperature in the configuration table, and control the speed of the power unit to reach the motor speed, adjust the valve core opening of the control valve so that the current of the actuator reaches the current value, control the actuator to perform an action, and obtain the hydraulic oil temperature of the aerial work platform again after an interval set time, and cyclically execute the step of "obtaining the current hydraulic oil temperature detected by the detection sensor".

[0023] In one embodiment, the control valve comprises an electro-hydraulic proportional control valve.

[0024] In one embodiment, the power plant comprises an electric motor or a generator.

[0025] In one embodiment, the actuator includes a boom of a boom-type aerial work platform or a boom of a scissor-type aerial work platform.

[0026] In one embodiment, the control unit comprises a memory for storing data of the configuration table.

[0027] When using the constant speed regulation control method provided by the present invention, first, a configuration table consisting of motor speeds and currents corresponding to each hydraulic oil temperature range during the operation of the aerial work platform is established, that is, by collecting test data, a configuration table is formed of the motor speeds and current values ​​corresponding to each hydraulic oil temperature when the standard action speed is reached, and saved in the control unit. Then, the current hydraulic oil temperature is collected, that is, after the aerial work platform is turned on, the detection sensor on the hydraulic oil tank can detect the hydraulic oil temperature and send the current hydraulic oil temperature information to the control unit. Afterwards, the control unit retrieves the motor speed and current values ​​corresponding to the current hydraulic oil temperature from the configuration table.

[0028] Then, the control unit issues a command to control the speed of the power unit and the valve core opening size of the control valve, so that the speed of the power unit reaches the corresponding motor speed and the current of the actuator reaches the corresponding current value. Subsequently, the control unit controls the actuator to perform the action, that is, under the condition of the motor speed and the valve core opening of the control valve matched in the previous step, the actuator is powered and performs the action at the target speed. Finally, after the interval setting time, the hydraulic oil temperature is collected again, that is, at each interval time, the control unit controls the detection sensor to collect the hydraulic oil temperature again, and then repeats the above process.

[0029] Through the above control process, when the hydraulic oil temperature of the aerial work platform changes, the different motor speeds and valve core opening sizes of the control valve can be matched through the data in the configuration table, so that the operating speed of the actuator is basically consistent, thereby improving the working efficiency and working stability of the aerial work platform users.

[0030] In summary, the constant speed regulation control method provided by the present invention can achieve that the operating speed of the actuator can be kept basically consistent under different temperatures of the hydraulic oil, thereby improving the stability and reliability of the operation.

[0031] In addition, the present invention also provides an aerial work platform using the above-mentioned constant speed regulation control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A flow chart of the constant speed regulation control method provided by the present invention;

[0034] Figure 2 This is a schematic structural diagram of the aerial work platform provided by the present invention.

[0035] Reference numerals:

[0036] 101- hydraulic oil tank; 102- power unit; 103- hydraulic pump; 104- control unit; 105- detection sensor; 106- control valve; 107- actuator. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The core of the present invention is to provide a constant speed regulation control method, which can achieve that the operating speed of the actuator can be kept basically consistent under different temperatures of the hydraulic oil, thereby improving the stability and reliability of the operation. Another core of the present invention is to provide an aerial work platform using the above constant speed regulation control method.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 A flow chart of the constant speed regulation control method provided by the present invention; Figure 2 This is a schematic structural diagram of the aerial work platform provided by the present invention.

[0040] This specific embodiment provides a constant speed regulation control method, including:

[0041] Step S1, establishing a configuration table consisting of motor speed and current corresponding to each hydraulic oil temperature range during the operation of the aerial work platform;

[0042] Step S2, obtaining the current hydraulic oil temperature of the aerial work platform, and transmitting the hydraulic oil temperature signal to the control unit 104;

[0043] Step S3, the control unit 104 retrieves the motor speed and current value corresponding to the hydraulic oil temperature in the configuration table, controls the speed of the power device 102 to reach the motor speed, and adjusts the valve core opening of the control valve 106 to make the current of the actuator 107 reach the current value;

[0044] Step S4, controlling the actuator 107 to perform an action;

[0045] Step S5, after the set interval time, the hydraulic oil temperature of the aerial work platform is obtained again, and the step of "transmitting the hydraulic oil temperature signal to the control unit 104" is cyclically executed, that is, repeating the above steps S2-S5.

[0046] It should be noted that when the ambient temperature changes, causing the hydraulic oil temperature to change, resulting in changes in the hydraulic oil temperature and viscosity properties, thereby causing the arm execution speed to change. At this time, the control unit 104 automatically controls the operation of the power unit 102 and the control valve 106, that is, dynamically controls the speed of the power unit 102 to reach the motor speed at the corresponding temperature, and dynamically adjusts the valve core opening of the control valve 106 to make the current of the actuator 107 reach the current value, so that the hydraulic oil can maintain basically consistent operating speed under different temperature conditions, thereby achieving stability and reliability of the action.

[0047] It should also be noted that the hydraulic oil temperature of the aerial work platform is obtained again after the set interval time because the frequency of collecting the hydraulic oil temperature will affect the response speed of the adjustment. In addition, if the ambient temperature changes slowly, the hydraulic oil temperature data can also be collected only at a certain moment. Some devices in the hydraulic control field belong to the continuous working system, that is, the machine works continuously, and the hydraulic oil temperature remains at a high level. At this time, the external temperature has little effect on the machine operation speed. Another device is intermittent motion and intermittent working system, but most actuators do not have high requirements for the continuity of the action process. They only require the feasibility and accuracy of the actuator, and there are few testing requirements for the comfort during the operation. However, aerial work platforms are different, and the subjective feelings of the operator are crucial to the evaluation of the machine. At this time, in order to avoid the boom operating speed of the aerial work platform being affected by the external environment, this method can be used to make the boom operating speed equivalent under different temperature environments.

[0048] When using the constant speed regulation control method provided by the present invention, first, a configuration table consisting of motor speeds and currents corresponding to each hydraulic oil temperature range during the operation of the aerial work platform is established, that is, by collecting test data, a configuration table is formed of motor speeds and current values ​​corresponding to each hydraulic oil temperature to achieve the standard action speed, and saved in the control unit 104. Then, the current hydraulic oil temperature is collected, that is, after the aerial work platform is turned on, the detection sensor 105 on the hydraulic oil tank 101 can detect the hydraulic oil temperature and send the current hydraulic oil temperature information to the control unit 104. Afterwards, the control unit 104 retrieves the motor speed and current values ​​corresponding to the current hydraulic oil temperature from the configuration table.

[0049] Then, the control unit 104 issues a command to control the speed of the power device 102 and the valve core opening size of the control valve 106, so that the speed of the power device 102 reaches the corresponding motor speed and the current of the actuator 107 reaches the corresponding current value. Subsequently, the control unit 104 controls the actuator 107 to perform the action, that is, under the condition of the motor speed and the valve core opening of the control valve 106 matched in the previous step, the actuator 107 is powered and performs the action at the target speed. Finally, after the interval setting time, the hydraulic oil temperature is collected again, that is, at each interval time, the control unit 104 controls the detection sensor 105 to collect the hydraulic oil temperature again, and then repeats the above process.

[0050] Through the above control process, when the hydraulic oil temperature of the aerial work platform changes, the data in the configuration table can be used to match different motor speeds and valve core opening sizes of the control valve 106, so that the operating speed of the actuator 107 is basically consistent, thereby improving the working efficiency and working stability of the aerial work platform user.

[0051] In summary, the constant speed regulation control method provided by the present invention can achieve that the operating speed of the actuator can be kept basically consistent under different temperatures of the hydraulic oil, thereby improving the stability and reliability of the operation.

[0052] In one embodiment, a configuration table of motor speed and current corresponding to each temperature range during the operation of the aerial work platform is established, including: by collecting test data, a configuration table of motor speed and current values ​​corresponding to each hydraulic oil temperature range during the operation of the aerial work platform is established, and the configuration table is stored in the control unit 104. In order to ensure the accuracy and credibility of the configuration table, multiple tests can be conducted, and as much test data as possible can be collected, and the data can be fitted and summarized according to a reasonable algorithm to ensure that the data included in the configuration table is sufficient, reasonable, credible and referenceable.

[0053] In one embodiment, the current hydraulic oil temperature of the aerial work platform is obtained, and the hydraulic oil temperature signal is transmitted to the control unit 104, including: after the aerial work platform is turned on, the detection sensor 105 detects the hydraulic oil temperature of the hydraulic oil tank, and transmits the current hydraulic oil temperature data to the control unit 104. That is, the detection sensor 105 detects the hydraulic oil temperature of the hydraulic oil tank in real time, so that the control unit 104 can obtain the hydraulic oil temperature, and then retrieve the motor speed and current value corresponding to the current hydraulic oil temperature in the configuration table, and control the speed of the power device 102 to reach the motor speed, and adjust the valve core opening of the control valve 106 so that the current of the actuator 107 reaches the current value.

[0054] In addition to the above-mentioned constant speed regulation control method, the present invention also provides an aerial work platform using any of the above-mentioned constant speed regulation control methods, which comprises:

[0055] Power plant 102;

[0056] A hydraulic pump 103 connected to an output shaft of the power device 102;

[0057] An actuator 107, which is connected to the oil outlet of the hydraulic pump 103 through a connecting pipe, and the connecting pipe is provided with a control valve 106;

[0058] A hydraulic oil tank 101 is connected to the oil inlet of a hydraulic pump 103. The hydraulic oil tank 101 is provided with a detection sensor 105. The detection sensor 105 is used to detect the current hydraulic oil temperature of the aerial work platform;

[0059] The control unit 104, the power unit 102, the hydraulic pump 103, the control valve 106, the detection sensor 105 and the actuator 107 are all connected to the control unit 104. The control unit 104 is used to obtain the current hydraulic oil temperature detected by the detection sensor 105, call the motor speed and current value corresponding to the current hydraulic oil temperature in the configuration table, and control the speed of the power unit 102 to reach the motor speed, adjust the valve core opening of the control valve 106, so that the current of the actuator 107 reaches the current value, control the actuator 107 to perform the action, and obtain the hydraulic oil temperature of the aerial work platform again after the interval set time, and cyclically execute the step of "obtaining the current hydraulic oil temperature detected by the detection sensor 105".

[0060] For the structures of other parts of the aerial work platform, please refer to the prior art and will not be described in detail in this article.

[0061] It should be noted that the power is provided by the power device 102 to drive the hydraulic pump 103 to rotate and provide hydraulic power. The hydraulic oil tank 101 provides hydraulic oil for the hydraulic pump 103. A detection sensor 105 is installed in the hydraulic oil tank 101. The signal of the detection sensor 105 is connected to the control unit 104. The control unit 104 can control the motor speed of the power device 102. At the same time, it can control the solenoid valve coil current of each valve of the control valve 106 (i.e., the electro-hydraulic proportional control valve), thereby controlling the opening size of each valve core of the electro-hydraulic proportional control valve and controlling the action speed of the actuator 107 (e.g., the boom). The speed of the power device 102 (e.g., the motor) will affect the output flow and pressure of the hydraulic pump 103, thereby affecting the action speed of the actuator 107. The control and use of this device does not require the participation of operators, and is all processed by the control unit 104, thereby improving the work efficiency and reliability.

[0062] In one embodiment, the control valve 106 includes an electro-hydraulic proportional control valve to accurately control the amount of oil pumped into the actuator 107 by the hydraulic pump 103 , thereby adjusting the current of the actuator 107 .

[0063] In one embodiment, the power device 102 includes a motor or a generator. For example, the hydraulic pump 103 can be driven by the electric power of the motor, or the hydraulic pump 103 can be driven by a generator (such as a diesel engine) to operate, thereby obtaining the motor speed or the engine speed, and making the motor speed or the engine speed the same as the motor speed corresponding to the current hydraulic oil temperature, and adjusting the valve core opening of the control valve 106 to adjust the current value of the actuator 107 to make it the same as the current value corresponding to the current hydraulic oil temperature, and finally controlling the actuator 107 to perform the boom movement.

[0064] In one embodiment, the actuator 107 includes a boom of an arm-type aerial work platform or a boom of a scissor-type aerial work platform, that is, the aerial work platform of the device is not limited to an arm-type aerial work platform or a scissor-type aerial work platform.

[0065] In one embodiment, the control unit 104 includes a memory for storing data in the configuration table, so that the control unit 104 can obtain the corresponding motor speed and current value in real time according to the current temperature detected by the detection sensor 105 .

[0066] In addition, it should be noted that the orientation or positional relationship indicated by "in and out" etc. in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description and facilitating understanding, 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.

[0067] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. Any combination of all embodiments provided by the present invention is within the protection scope of this invention and will not be described in detail here.

[0068] The constant speed regulation control method and aerial work platform provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A constant speed regulation control method, characterized in that: include: Establishing a configuration table consisting of motor speeds and currents corresponding to each hydraulic oil temperature range during the operation of the aerial work platform, including collecting test data to establish the configuration table consisting of the motor speeds and currents corresponding to the standard action speeds within each hydraulic oil temperature range during the operation of the aerial work platform, wherein the configuration table is stored in the control unit (104); Acquiring the current hydraulic oil temperature of the aerial work platform and transmitting the hydraulic oil temperature signal to the control unit (104), including after the aerial work platform is turned on, detecting the hydraulic oil temperature of the hydraulic oil tank by a detection sensor (105), and transmitting the current hydraulic oil temperature data to the control unit (104); The control unit (104) retrieves the motor speed and current value corresponding to the hydraulic oil temperature in the configuration table, controls the speed of the power device (102) to reach the motor speed, and adjusts the valve core opening of the control valve (106) so that the current of the actuator (107) reaches the current value; Controlling the actuator (107) to perform an action, including providing power to the actuator (107) and performing the action at a target speed when the motor speed and the valve core opening of the control valve (106) matched in the previous step; After a set interval time has passed, the hydraulic oil temperature of the aerial work platform is acquired again, and the step of "transmitting the hydraulic oil temperature signal to the control unit (104)" is cyclically executed, including acquiring the hydraulic oil temperature again after a set interval time has passed, and at each interval time, the control unit (104) controls the detection sensor (105) to acquire the hydraulic oil temperature again, and repeatedly executes the above process, so that when the hydraulic oil temperature of the aerial work platform changes, the motor speed and the valve core opening of the control valve (106) are matched by the data in the configuration table, so that the operating speed of the actuator (107) is consistent.

2. An aerial work platform, using the constant speed adjustment control method described in claim 1, characterized in that: include: Power plant (102); A hydraulic pump (103) connected to an output shaft of the power device (102); An actuator (107) which is connected to the oil outlet of the hydraulic pump (103) via a connecting pipe, and the connecting pipe is provided with a control valve (106); A hydraulic oil tank (101) connected to the oil inlet of the hydraulic pump (103); the hydraulic oil tank (101) is provided with a detection sensor (105); the detection sensor (105) is used to detect the current hydraulic oil temperature of the aerial work platform; A control unit (104), the power device (102), the hydraulic pump (103), the control valve (106), the detection sensor (105) and the actuator (107) are all connected to the control unit (104), the control unit (104) is used to obtain the current hydraulic oil temperature detected by the detection sensor (105), retrieve the motor speed and current value corresponding to the current hydraulic oil temperature in the configuration table, control the speed of the power device (102) to reach the motor speed, adjust the valve core opening of the control valve (106) so that the current of the actuator (107) reaches the current value, control the actuator (107) to perform an action, and obtain the hydraulic oil temperature of the aerial work platform again after an interval setting time, and cyclically execute the step of "obtaining the current hydraulic oil temperature detected by the detection sensor (105)".

3. The aerial work platform according to claim 2, characterized in that: The control valve (106) comprises an electro-hydraulic proportional control valve.

4. The aerial work platform according to claim 2, characterized in that: The power device (102) comprises an electric motor or a generator.

5. The aerial work platform according to claim 2, characterized in that: The actuator (107) comprises a boom of an arm-type aerial work platform or a boom of a scissor-type aerial work platform.

6. The aerial work platform according to claim 2, characterized in that: The control unit (104) comprises a memory for storing data of the configuration table.

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