Transmission band positioning method based on current detection and encoder
By using a combination of current detection and encoder in the transmission system, the problem of transmission equipment positioning and fault detection is solved, real-time positioning and speed regulation are achieved, cost reduction and sensor installation problems are avoided.
Patent Information
- Application Number
- CN202411569978.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-01-03
AI Technical Summary
Existing transmission systems are difficult to achieve real-time positioning of transmission equipment, and in some environments, the inability to install sensors or inaccurate sensors lead to positioning failure, and the grating scales and vision systems are costly and prone to damage.
By connecting a current transmitter in series between the motor and the motor driver, measuring the current value and connecting it to the PLC controller, combining the encoder to detect the position and current changes of the item on the transmission belt, positioning detection and fault detection are achieved, and the PLC controller is adjusted The motor running speed and display control device display fault information.
Realize real-time positioning of transmission equipment, real-time positioning of items on the transmission belt, real-time speed regulation of transmission belt, no-load monitoring and real-time alarm of motor overload blockage, reducing costs, no-addition of other sensors, realizing the motor status Test.
Smart Images
Figure CN119240289A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of conveyor belt positioning, and in particular to a conveyor belt positioning method based on current detection and an encoder. Background Art
[0002] With the vigorous development of the automation industry, automatic transmission systems are increasingly widely used in various industries. Existing transmission systems use sensors such as photoelectric sensors, potentiometer sensors, and laser sensors to achieve single-point positioning of equipment, which cannot achieve real-time positioning of transmission equipment and in some environments, the sensors cannot be installed or the sensors are inaccurate, resulting in positioning failure. Grating rulers and visual systems can achieve overall positioning of the conveyor belt, but grating rulers and cameras are expensive and easy to damage.
[0003] In order to solve the above-mentioned problem, the present invention proposes a conveyor belt positioning method based on current detection and encoder to realize positioning detection and fault detection of the transmission equipment. Summary of the invention
[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a conveyor belt positioning method based on current detection and encoder, which confirms whether there are any objects on the conveyor belt at this time by observing the changes in the motor current when the conveyor belt is unloaded and loaded, thereby realizing positioning detection and fault detection of the transmission equipment.
[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: A conveyor belt positioning method based on current detection and encoder, one end of a current transmitter is connected in series between a motor and a motor driver to measure the current value, the other end of the current transmitter is connected to a PLC controller, the PLC controller reads and records the change value of the current through current transmission, the PLC controller is connected to the motor driver, the motor driver is connected to the motor, the PLC changes the running speed of the motor by changing the pulse signal of the motor driver, the motor is connected to the encoder, the encoder is connected to the PLC controller, the PLC controller reads and records the code value of the encoder, and the PLC controller is connected to a display control device; the PLC controller After detecting the change of motor current, the encoder value is recorded and the serial number of the item placed on the conveyor belt is written. When the item placed on the conveyor belt moves forward, the code value of the encoder changes. The PLC controller obtains the real-time position of the item placed on the conveyor belt by subtracting the initial code value from the current code value and multiplying it by the actual distance corresponding to a code value. The PLC controller adjusts the output pulse in real time to change the transmission speed according to the speed of the position change of the item placed on the conveyor belt. When the PLC controller detects that the current value exceeds the set range through the current transmitter, the PLC controller sends an alarm model to the display control device, and the display control device displays a fault.
[0006] Furthermore, the display control device is a touch-controlled display.
[0007] Furthermore, the motor has its own encoder or is connected to an external encoder.
[0008] Furthermore, the motor transmitter and the motor driver are connected to a power source, and the motor driver provides power to the motor.
[0009] The beneficial effects of the present invention are as follows: the present invention confirms whether there is an item on the conveyor belt at this time by observing the change in the motor current when the conveyor belt is unloaded and loaded. When it is confirmed that the item is placed on the conveyor belt, the code value of the encoder at this time is recorded. When the item moves forward, the code value of the encoder also increases accordingly, so that the location of the item can be known, thereby realizing the positioning detection and fault detection of the transmission equipment. The present invention can realize the real-time positioning of the items on the conveyor belt, the real-time speed regulation of the conveyor belt, the real-time monitoring of unloaded and loaded items, and the real-time alarm of motor overload and stall, without the need to install various other sensors such as photoelectric sensors, thus reducing costs, realizing motor current detection, and detecting the motor status. The touch control display visualizes the transport speed and item position in real time. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the conveyor belt positioning method based on current detection and encoder of the present invention. DETAILED DESCRIPTION
[0011] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.
[0012] The present invention provides a conveyor belt positioning method based on current detection and encoder, such as Figure 1 As shown, one end of the current transmitter is connected in series between the motor and the motor driver to measure the current value, and the other end of the current transmitter is connected to the PLC controller, which reads and records the change value of the current through current transmission, and the PLC controller is connected to the motor driver, which is connected to the motor. The PLC changes the running speed of the motor by changing the pulse signal of the motor driver. Specifically, the motor transmitter and the motor driver are connected to a power supply, and the motor driver provides power to the motor.
[0013] The motor is connected to an encoder. Specifically, the motor has its own encoder or is connected to an external encoder. The encoder is connected to a PLC controller, which reads and records the code value of the encoder. The PLC controller is connected to a display control device. The motor drives the conveyor belt to move through a linkage device. The encoder provides the code value of the motor rotation and transmits the code value to the PLC controller, which records the code value. Specifically, the display control device is a touch control display.
[0014] The touch control display can display the position of the items placed on the conveyor belt in real time. The PLC controller detects the change in the motor current and records the encoder value at this time, and writes the serial number of the items placed on the conveyor belt. When the items placed on the conveyor belt move forward, the code value of the encoder changes. The PLC controller obtains the real-time position of the items placed on the conveyor belt by subtracting the initial code value from the current code value and multiplying it by the actual distance corresponding to the code value. The PLC controller adjusts the output pulse in real time to change the transmission speed according to the speed of the position change of the items placed on the conveyor belt.
[0015] When the conveyor belt equipment is blocked or overloaded, the motor current increases accordingly. When the driving motor current exceeds the limit, the PLC controller sends an alarm signal to the touch control display, and the touch control display displays a fault. That is, when the PLC controller detects through the current transmitter that the current value exceeds the set range, the PLC controller sends an alarm model to the display control device, and the display control device displays a fault. Example
[0016] When the object is placed on the conveyor belt, the PLC controller detects the change in the motor current, records the encoder code value at this time, and numbers the object. The touch control display shows the position of the object in real time, and displays the click current value. When overloaded, the touch screen alarms and cuts off the power supply. The conveyor belt speed can be adjusted in real time through the touch control display.
[0017] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Alterations, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.
Claims
1. A conveyor belt positioning method based on current detection and encoder, characterized in that: One end of the current transmitter is connected in series between the motor and the motor driver to measure the current value. The other end of the current transmitter is connected to the PLC controller. The PLC controller reads and records the change value of the current through current transmission. The PLC controller is connected to the motor driver, and the motor driver is connected to the motor. The PLC changes the running speed of the motor by changing the pulse signal of the motor driver. The motor is connected to the encoder, and the encoder is connected to the PLC controller. The PLC controller reads and records the code value of the encoder. The PLC controller is connected to the display control device. After detecting the change of the motor current, the PLC controller records the encoder value at this time and writes the serial number of the item placed on the conveyor belt. When the item placed on the conveyor belt moves forward, the code value of the encoder changes. The PLC controller obtains the real-time position of the item placed on the conveyor belt at this time by subtracting the initial code value from the current code value and multiplying it by the actual distance corresponding to a code value. The PLC controller adjusts the output pulse to change the transmission speed in real time according to the speed of the position change of the item placed on the conveyor belt. When the PLC controller detects that the current value exceeds the set range through the current transmitter, the PLC controller sends an alarm model to the display control device, and the display control device displays a fault.
2. A conveyor belt positioning method based on current detection and encoder according to claim 1, characterized in that: The display control device is a touch control display.
3. A conveyor belt positioning method based on current detection and encoder according to claim 1, characterized in that: The motor has its own encoder or is connected to an external encoder.
4. A conveyor belt positioning method based on current detection and encoder according to claim 1, characterized in that: The motor transmitter and the motor driver are connected to a power source, and the motor driver provides power to the motor.