Drum limiting device, stirring apparatus, drum position adjusting method, and controller

Abstract

The present application relates to the technical field of stirring equipment, and particularly relates to a drum limiting device, a stirring equipment, a drum position adjusting method and a controller, the drum limiting device comprising a limiting wheel and a signal generating assembly, the signal generating assembly being connected with the limiting wheel and being suitable for converting the rotation of the limiting wheel into an electric signal. The signal generating assembly can convert the rotation state information of the limiting wheel into an electric signal, according to the actual running state of the drum reflected by the electric signal, the relevant personnel can be timely reminded to adjust the running state of the drum according to the specification, the excessive bias to one side of the limiting wheel is avoided, the fault is prevented from occurring, and the effect of effectively solving the problems such as damage of the bearing and the rack of the limiting wheel induced by the untimely adjustment of the drum can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stirring equipment, in particular to a drum limiting device, a stirring equipment, a drum position adjusting method and a controller. BACKGROUND

[0002] The limiting wheel assembly of the drum in the stirring equipment is located on the bottom frame assembly on the lower side of the drum, and the bottom frame assembly mainly consists of bottom frame welding, a driving device, a limiting wheel assembly, a motor reducer assembly and an adjusting device. Generally, the limiting of the drum is realized by two limiting wheel assemblies to constrain the upper and lower limit positions of the drum during operation. When the drum excessively biases the limiting wheel on one side, the relative position between the center line of the driving device and the center of the drum needs to be adjusted by adjusting the bolt, so as to slow down and eliminate the bias and avoid damage to the bearings and other parts in the driving wheel assembly.

[0003] During the operation of the drum, the rolling ring slightly contacts the limiting wheel on the lower side, and the contact track of the limiting wheel and the rolling ring is not allowed to exceed 2 / 3 of the arc length of the rolling ring. However, due to the lack of effective judgment of the drum operation state by the maintenance personnel of the stirring equipment and the lack of effective monitoring of the up and down deviation state of the drum, when the drum driving device is not adjusted properly, the drum is easy to deviate to one side, the drum may bias the limiting wheel on one side, causing damage to the bearings in the wheel body, deformation of the support beam and other faults, and causing damage to the limiting wheel assembly or shutdown accidents. SUMMARY

[0004] The present application provides a drum limiting device, a stirring equipment, a drum position adjusting method and a controller to solve one of the defects in the prior art, realize that the signal generating assembly can convert the rotating state information of the limiting wheel into an electric signal, according to the actual operation state of the drum reflected by the electric signal, the relevant personnel can be reminded in time to adjust the drum operation state according to the specification, avoid excessive bias of the limiting wheel on one side, prevent faults, and effectively solve the problems of damage to the bearings and the rack of the limiting wheel induced by the drum adjustment not in time.

[0005] The present application provides a drum limiting device, comprising:

[0006] A limiting wheel;

[0007] A signal generating assembly connected with the limiting wheel, adapted to convert the rotation of the limiting wheel into an electric signal.

[0008] According to the drum limiting device provided by the present application, the signal generating assembly comprises:

[0009] A rolling wheel, the wheel surface of the rolling wheel is in rolling contact with the wheel surface of the limiting wheel;

[0010] A micro generator, the rotating shaft of the micro generator is connected with the rolling wheel.

[0011] According to the drum limiting device provided by the application, the signal generating assembly further comprises:

[0012] A pressing component is connected with the micro generator and is adapted to press the wheel surface of the drum against the wheel surface of the limiting wheel.

[0013] According to the drum limiting device provided by the application, the signal generating assembly further comprises:

[0014] A signal amplifier is connected with the micro generator.

[0015] According to the drum limiting device provided by the application, the signal generating assembly further comprises:

[0016] A storage display is connected with the signal amplifier.

[0017] The application further provides a stirring device comprising:

[0018] A drum is provided with a drum ring.

[0019] Two groups of the drum limiting devices described above are arranged oppositely and are arranged on two sides of the drum ring respectively.

[0020] The application further provides a drum position adjusting method based on a drum limiting device, wherein the drum limiting device comprises a limiting wheel, a drum wheel and a micro generator, the wheel surface of the drum wheel is in rolling contact with the wheel surface of the limiting wheel, the rotating shaft of the micro generator is connected with the drum wheel, and the drum position adjusting method comprises the following steps:

[0021] An actual current value of the micro generator is obtained.

[0022] A judgment parameter is obtained based on the actual current value and a set current value.

[0023] The drum position is adjusted based on the judgment parameter.

[0024] According to the drum position adjusting method provided by the application, the judgment parameter is obtained based on the actual current value and the set current value, and the method comprises the following steps:

[0025] A judgment current value is obtained based on the absolute value of the difference between the actual current value and the set current value.

[0026] According to the drum position adjusting method provided by the application, the drum position is adjusted based on the judgment parameter, and the method comprises the following steps:

[0027] If the judgment parameter is equal to zero, an alarm information is sent out, and a driving device is controlled to adjust the drum position.

[0028] Or, determining that the determination parameter is equal to the set current value, the roller position is maintained;

[0029] Or, determining that the determination parameter is less than the set current value, the driving device is controlled to adjust the roller position or maintain the roller position.

[0030] The application also provides a controller, comprising:

[0031] An acquisition module is configured to acquire an actual current value of the micro-generator;

[0032] A comparison module is configured to obtain a determination parameter based on the actual current value and a set current value;

[0033] A processing module is configured to determine a roller position based on the determination parameter.

[0034] The roller limiting device provided by the application has the following advantages: the limiting wheel of the roller is installed on one side of the roller, the signal generating assembly is connected with the limiting wheel, if the roller is inclined to one side of the limiting wheel, the limiting wheel is in contact with the limiting wheel and is biased to make the limiting wheel rotate, and the signal generating assembly can convert the rotating state information of the limiting wheel into an electric signal. According to the actual operating state of the roller reflected by the electric signal, relevant personnel can be reminded in time to adjust the operating state of the roller according to the specification, so that the limiting wheel is prevented from being excessively biased to one side and faults are prevented from occurring, and problems such as damage of the bearing of the limiting wheel and the rack caused by untimely adjustment of the roller can be effectively solved.

[0035] The application can be applied to the operating state of the roller as a self-powered detection, the rotating output of the rolling ring and the limiting wheel is converted into an electric current by the signal generating assembly, the operating state of the roller is judged by the difference of the micro-current, information collection, transmission, processing and feedback are realized, the equipment on site is controlled according to the judgment result, the real-time monitoring effect on the operating state of the roller is achieved, the control principle is easy to realize, simple and practical, and is convenient to popularize. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0037] Figure 1 FIG. 1 is a structural schematic diagram of the roller limiting device provided by the application;

[0038] Figure 2 FIG. 2 is a flow schematic diagram of the roller position adjustment method provided by the application;

[0039] Figure 3 FIG. 3 is a structural schematic diagram of the electronic device provided by the application.

[0040] Reference signs:

[0041] 100, limit wheel;

[0042] 200, signal generating assembly; 210, scroll wheel; 220, micro generator; 230, compression component; 240, signal amplifier; 250, storage display;

[0043] 300, scroll ring;

[0044] 810, processor; 820, communication interface; 830, memory; 840, communication bus. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] As shown in Figure 1 The roller limiting device provided by the embodiment of the present application includes a limit wheel 100 and a signal generating assembly 200, the signal generating assembly 200 is connected with the limit wheel 100, and is adapted to convert the rotation of the limit wheel 100 into an electric signal.

[0047] The roller limiting device of the embodiment of the present application, the limit wheel 100 of the roller is installed on one side of the roller, the signal generating assembly 200 is connected with the limit wheel 100, if the roller is inclined to one side of the limit wheel 100, the limit wheel 100 is in contact and biased to rotate, and the signal generating assembly 200 can convert the rotation state information of the limit wheel 100 into an electric signal. According to the actual running state of the roller reflected by the electric signal, the relevant personnel can be reminded in time to adjust the running state of the roller according to the specification, so as to avoid excessive bias to one side of the limit wheel 100 and prevent faults from occurring, and the problems such as damage of the bearing of the limit wheel 100 and the rack induced by the untimely adjustment of the roller can be effectively solved.

[0048] The present application can be applied to the running state of the roller as a self-powered detection, the rotation of the scroll ring 300 and the limit wheel 100 is output as a current by the signal generating assembly 200, the state of the roller is judged by the difference of the micro current, the collection and transmission of information and the feedback of processing are realized, the equipment action on site is controlled according to the judgment result, the real-time monitoring effect for the running of the roller is achieved, the control principle is easy to realize, simple and practical, and is convenient for popularization.

[0049] According to an embodiment of the present application, the signal generating assembly 200 comprises a roller 210 and a micro-generator 220, the roller 210 is in rolling contact with the limiting wheel 100, and the micro-generator 220 is connected with the roller 210. In this embodiment, the roller 210 is always in rolling contact with the limiting wheel 100, and when the limiting wheel 100 rotates, the roller 210 can be driven to rotate synchronously. The roller 210 is connected with the micro-generator 220, and when the roller 210 rotates, the micro-generator 220 rotates, and then the micro-generator 220 generates current. Thus, the rotation signal of the limiting wheel 100 caused by the bias of the drum to one side is converted into current, i.e., the rotation state information of the limiting wheel 100 driven by the rolling ring 300 is converted into current signal by the micro-generator 220, and then into digital signal, and then the digital signal is operated to extract the characteristics of the target, and then the equipment in the field is controlled according to the result of the judgment.

[0050] In this embodiment, the micro-generator 220 and the roller 210 are assembled on the chassis of the drying drum, and the rotation signal of the limiting wheel 100 caused by the bias of the drum to one side is converted into current, i.e., the rotation state information of the limiting wheel 100 driven by the rolling ring 300 is converted into current signal by the micro-generator 220, and then into digital signal, and then the digital signal is operated to extract the characteristics of the target, and then the equipment in the field is controlled according to the result of the judgment.

[0051] In other embodiments, the signal generating assembly 200 can also use other device structures, such as encoders, etc., which can convert the rotation signal of the limiting wheel 100 into visual, analyzable, and recordable excitation signal.

[0052] According to an embodiment of the present application, the signal generating assembly 200 further comprises a pressing component 230 connected with the micro-generator 220, which is adapted to press the roller 210 against the limiting wheel 100. In this embodiment, the pressing component 230 is connected with the micro-generator 220, and the pressing component 230 can apply a pre-tightening force to the micro-generator 220. Within a certain pre-tightening force range, it can be ensured that the roller 210 is always in close contact with the limiting wheel 100, and the roller 210 and the limiting wheel 100 are separated, and the force of the limiting wheel 100 can be completely transmitted to the roller 210 to drive the micro-generator 220 to rotate and generate electricity, and the electrical signal can accurately reflect the contact between the drum and the limiting wheel 100.

[0053] In order to avoid the pressing component 230 directly connecting and contacting the roller 210, which will hinder the rotation of the roller 210, the pressing component 230 is connected with the micro-generator 220. Since the roller 210 and the micro-generator 220 are connected as an integral structure, the pressing component 230 can form an indirect force pressing structure relative to the roller 210, which meets the structure requirements of pressing while avoiding hindering the movement of the roller 210 to the greatest extent, and the structure arrangement is more scientific.

[0054] In the embodiment, the compression component 230 can adopt a compression spring, which has a certain elastic extension amount, and can provide a certain movement space for the micro generator 220 and the roller 210 in the extension direction of the compression spring, so as to avoid the breakage of the connection position between the roller 210 and the micro generator 220 caused by the excessive bias angle of the roller.

[0055] According to an embodiment provided by the application, the signal generating assembly 200 further comprises a signal amplifier 240 connected with the micro generator 220. In the embodiment, when the limiting wheel 100 is biased to one side by the roller, the rotation of the limiting wheel 100 is transmitted to the roller 210, the roller 210 drives the micro generator 220 to generate electricity, and generates a current signal, which is converted into a visual and storable digital signal after entering the signal amplifier 240.

[0056] According to a roller limiting device provided by the application, the signal generating assembly 200 further comprises a storage display 250 connected with the signal amplifier 240. In the embodiment, when the limiting wheel 100 is biased to one side by the roller, the rotation of the limiting wheel 100 is transmitted to the roller 210, the roller 210 drives the micro generator 220 to generate electricity, and generates a current signal, which is converted into a visual and storable digital signal after entering the signal amplifier 240, and the digital signal is transmitted to the storage display 250, so that the storage and analysis processing can be performed, and the real-time display can be performed, so that the staff can understand the rotation synchronization of the limiting wheel 100 and the rolling ring 300, and whether the rolling ring 300 running period is in contact with the limiting wheel 100, and the predictive adjustment is performed according to the above, and then the pre-maintenance alarm of the roller running state is realized, and the real-time monitoring effect of the roller running is achieved.

[0057] The embodiment of the application further provides a stirring device, which comprises a roller and two groups of the roller limiting devices as described in the above embodiment, and the roller is provided with a rolling ring 300; the two groups of limiting wheels 100 are oppositely arranged and respectively arranged on the two sides of the rolling ring 300.

[0058] The stirring device of the embodiment of the application is arranged on the bottom frame assembly on the lower side of the roller, and the bottom frame assembly mainly comprises a welded bottom frame, a driving device, a roller limiting device, a motor reducer assembly and an adjusting device. The limiting of the roller is realized by the two groups of roller limiting devices, and the upper and lower limit positions of the roller during the operation of the roller are constrained. When the limiting wheel 100 is excessively biased to one side by the roller, the relative position between the center line of the driving device and the center of the roller needs to be adjusted by the adjusting bolt, so as to slow down and eliminate the bias, and avoid the damage to the bearings and other parts in the driving device.

[0059] In this embodiment, the mixing equipment can be an asphalt mixing plant. The drying system utilizes different types of lifting blades arranged in different sections within the drum to fully dehydrate and heat cold aggregate with a certain moisture content to a set temperature in a short time. Typically, drying drums are driven by friction using four sets of motor reducers, and the drum usually rotates at a downward angle of about 4°. To maintain a relatively stable operating state, the drive device needs to be adjusted in a timely manner so that the center lines of the four drive devices have an appropriate angle with the center line of the drum, ensuring that the drum does not deviate excessively downwards or upwards. Limiting wheels 100 are installed at the extreme positions of the drum's deflection. In actual operation, the contact between the drum and the limiting wheels 100 differs between idling and material-carrying operation. Generally, during idling, the lower limiting wheel 100 is contacted, while during material-carrying operation, the upper limiting wheel 100 is contacted. When adjusting the extrusion pressure on the limiting wheels 100 using the drum limiting device of this invention, the operating condition of the limiting wheels 100 under material-carrying operation should be used as the basis for adjustment.

[0060] The rotation of the limit wheel 100 drives the micro generator 220 to generate electricity, which is used as an excitation signal to determine the running status of the roller ring 300. That is, the rotation status information of the roller ring 300 driving the limit wheel 100 is converted into a current signal by the micro generator 220, and then into a digital signal. Various calculations are performed on these signals to extract the target features, and then the equipment action is controlled according to the judgment result.

[0061] In other embodiments, the mixing equipment may also be a concrete mixer or other equipment with a mixing drum.

[0062] The roller position adjustment method provided by the present invention is described below. The roller position adjustment method described below can be referred to in correspondence with the roller limiting device described above.

[0063] like Figure 2 As shown, this embodiment of the invention also provides a roller position adjustment method, based on the roller limiting device as described in the above embodiments, including:

[0064] Obtain the actual current value of the micro generator 220;

[0065] The determination parameters are obtained based on the actual current value and the set current value;

[0066] The position of the roller is determined based on the judgment parameters.

[0067] The drum position adjusting method of the embodiment of the application, the limit wheel 100 side of the drum is equipped with a micro generator 220 and a roller 210, the rotation signal of the limit wheel 100 when being biased to one side by the drum is converted into an actual current value by the roller 210 and the micro generator 220, and automatic detection is realized. In the process of drum rotation, the actual current value generated by the micro generator 220 in the signal generating assembly 200 is acquired in real time, the determination parameter is obtained again by the actual current value and the set current value, the determination parameter is taken as the reference result of the real-time position of the drum obtained correspondingly, and then the drum position is adjusted. In the actual operation process, the micro generator 220 is self-excited to generate electricity by the limit wheel 100, and according to the current value change, the early warning of the drum operation state can be realized.

[0068] According to an embodiment provided by the application, the determination parameter obtained based on the actual current value and the set current value includes:

[0069] The determination current value is obtained based on the absolute value of the difference between the actual current value and the set current value.

[0070] In the embodiment, the determination parameter is the absolute value of the difference between the actual current value and the set current value, that is, the determination current value, which can fully reflect the relationship between the actual current generated by the micro generator 220 in real time and the set current, so as to more accurately obtain the rotation condition of the limit wheel 100 and the drum. The set current value is the maximum current value generated by the micro generator 220 when the drum ring 300 of the drum presses the limit wheel 100.

[0071] In other embodiments, the determination parameter can also be other forms of parameter results, such as the comparison result of the actual current value and the set current value, and the set current value can also be set according to the offset limit or adjustment requirement of the actual drum and the limit wheel 100.

[0072] According to an embodiment provided by the application, the drum position is adjusted based on the determination parameter, including:

[0073] If it is determined that the determination parameter is equal to zero, an alarm information is sent, and the driving device is controlled to adjust the drum position;

[0074] Or, if it is determined that the determination parameter is equal to the set current value, the drum position is maintained;

[0075] Or, if it is determined that the determination parameter is less than the set current value, the driving device is controlled to adjust the drum position or maintain the drum position.

[0076] In this embodiment, the current value Ab is set as the maximum current value generated by the micro generator 220 when the rolling ring 300 of the drum presses the limit wheel 100, the micro generator 220 can detect the real-time current value As when the limit wheel 100 rotates, and the current difference ΔAs calculated according to the set current value Ab and the real-time current value As is the determination parameter, that is, the determination parameter ΔAs = |Ab-As|, and the drum position is adjusted according to the comparison between the determination parameter ΔAs and the set current value Ab, as follows:

[0077] When ΔAs = 0, it is determined that the limit wheel 100 and the rolling ring 300 rotate synchronously, the limit wheel 100 is in a state of being pressed all the time, and the alarm needs to be started to send alarm information and adjust the position state of the drum.

[0078] When ΔAs = Ab, it is determined that the speed of the limit wheel 100 is 0, and the limit wheel 100 and the rolling ring 300 are in a non-contact state, and the position of the drum does not need to be adjusted.

[0079] When ΔAs < Ab, it is determined that the limit wheel 100 and the rolling ring 300 do not rotate synchronously, that is, the rolling ring 300 has a non-contact time with the limit wheel 100 in the running cycle, and the rolling ring 300 and the limit wheel 100 are in a state of slight contact, and whether to adjust the position of the drum is determined according to actual needs.

[0080] The controller provided by the embodiment of the present application executes the drum position adjustment method of the above embodiment, and includes an acquisition module, a comparison module and a processing module, the acquisition module is used to acquire the actual current value of the micro generator 220, the comparison module can obtain a determination parameter based on the actual current value and the set current value, and the processing module can adjust the position of the drum based on the determination parameter.

[0081] The controller of the embodiment of the present application sends the current signal of the micro generator 220 to the comparison module, the comparison module performs various operations to extract the characteristics of the target, and then the processing module controls the action of the device on site according to the result of the determination, and the control principle is easy to implement.

[0082] As shown in Figure 3 The embodiment of the present application also provides an electronic device, which can include a processor 810, a communications interface 820, a memory 830 and a communications bus 840, wherein the processor 810, the communications interface 820 and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the drum position adjustment method.

[0083] In addition, the logic instructions in the memory 830 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0084] In another aspect, the embodiments of the present application also provide a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, and when the program instructions are executed by a computer, the computer can execute the drum position adjustment method provided by the above-mentioned embodiments.

[0085] In another aspect, the embodiments of the present application also provide a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the drum position adjustment method provided by the above-mentioned embodiments.

[0086] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0087] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions essentially or the parts that contribute to the prior art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments.

[0088] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drum stopper, characterized by, The application relates to a drum position adjusting device and a drum position adjusting method. The device comprises: a limiting wheel; a signal generating assembly connected with the limiting wheel, which is adapted to convert the rotation of the limiting wheel into an electric signal reflecting the actual operation state of the drum; 2. The drum stop device according to claim 1, characterized in that the signal generating assembly comprises a roller and a micro-generator, the wheel surface of the roller is in rolling contact with the wheel surface of the limiting wheel, and the rotating shaft of the micro-generator is connected with the roller as an integral structure. The signal generating assembly further comprises:

3. The drum stop device according to claim 1, wherein a pressing component connected with the micro-generator, which is adapted to press the wheel surface of the roller against the wheel surface of the limiting wheel. The signal generating assembly further comprises:

4. The drum stop device according to claim 3, characterized in that a signal amplifier connected with the micro-generator. The signal generating assembly further comprises:

5. A stirring apparatus, characterized by a storage display connected with the signal amplifier. The application relates to a drum position adjusting device and a drum position adjusting method. The device comprises:

6. A method of adjusting the position of a drum, characterized by, a drum provided with a drum ring; two groups of drum limiting devices as claimed in any one of claims 1 to 4, the two groups of limiting wheels are oppositely arranged and respectively arranged on the two sides of the drum ring. Based on the drum limiting device as claimed in any one of claims 1 to 4, the drum limiting device comprises a limiting wheel, a roller and a micro-generator, the wheel surface of the roller is in rolling contact with the wheel surface of the limiting wheel, and the rotating shaft of the micro-generator is connected with the roller as an integral structure, and the drum position adjusting method comprises the following steps: acquiring the actual current value of the micro-generator; 7. The drum position adjustment method according to claim 6, characterized by, obtaining a judgment parameter based on the actual current value and a set current value; adjusting the drum position based on the judgment parameter.

8. The drum position adjustment method according to claim 6, characterized by, The step of obtaining the judgment parameter based on the actual current value and the set current value comprises the following step: obtaining a judgment current value based on the absolute value of the difference between the actual current value and the set current value. The step of adjusting the drum position based on the judgment parameter comprises the following steps: determining that the judgment parameter is equal to zero, then issuing an alarm information and controlling a driving device to adjust the drum position; 9. A controller characterized by comprising: or, determining that the judgment parameter is equal to the set current value, then keeping the drum position; or, determining that the judgment parameter is less than the set current value, then controlling the driving device to adjust the drum position or keep the drum position. For realizing the method as claimed in any one of claims 6 to 8, the device comprises: an acquiring module for acquiring the actual current value of the micro-generator; a comparing module for obtaining a judgment parameter based on the actual current value and a set current value; a processing module for determining the drum position based on the judgment parameter.

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