Dynamic Weighing Integrator Testing System

Abstract

A dynamic weighing integrator testing system according to an embodiment of the present invention includes: a PLC, a dynamic weighing integrator under test, a motor, and a speed sensor; the speed sensor is connected to the motor to receive the motor's rotational speed signal, and the speed sensor is connected to the dynamic weighing integrator under test to transmit the rotational speed signal to the dynamic weighing integrator under test; the dynamic weighing integrator under test is also connected to the motor and the PLC respectively to receive a simulated weight signal sent by the PLC, and performs PID adjustment based on the received rotational speed signal, the simulated weight signal, and a preset value, and outputs adjustment signals for PID adjustment to the motor and the PLC. By setting up this testing system, the design of a space-consuming and complex control device is eliminated, and the PID function of the dynamic weighing integrator can be tested, with various parameter settings available, making it more flexible.

Description

Technical Field

[0001] This utility model relates to the field of dynamic weighing integrators, and more specifically, to a dynamic weighing integrator testing system. Background Technology

[0002] A dynamic weighing integrator is an automated metering device that can measure the weight of an object in motion (such as during transportation or conveying) in real time. It is widely used in industrial production, logistics, and warehousing management. The PID (Proportional-Integral-Derivative) control function in a dynamic weighing integrator achieves precise weighing control by adjusting control parameters. This is a crucial function of the dynamic weighing integrator; therefore, the design and verification of the PID control function are particularly important for the reliability and stability of the dynamic weighing integrator in the field.

[0003] Validating PID functionality in a laboratory with a real system is particularly difficult because the test system includes not only load cells, speed sensors, and weighing integrators, but also a large transport mechanism. This means that the laboratory needs to reserve a lot of space and the project needs to allocate a large portion of its budget to the test system. Utility Model Content

[0004] In view of this, the present invention proposes a testing system for a dynamic weighing instrument that occupies little space and has low cost.

[0005] A dynamic weighing integrator testing system according to an embodiment of the present invention includes: a PLC, a dynamic weighing integrator under test, a motor, and a speed sensor; the dynamic weighing integrator under test is connected to the speed sensor to receive a speed output signal output by the speed sensor; the PLC is connected to the dynamic weighing integrator under test to receive an adjustment signal output by the dynamic weighing integrator under test, the adjustment signal being a signal generated by the dynamic weighing integrator under test through PID adjustment based on an internal preset value and the value of the speed output signal; the PLC is also connected to the motor to transmit the adjustment signal value of the adjustment signal received from the dynamic weighing integrator under test to the motor; the motor is connected to the speed sensor to transmit the adjustment signal value of the adjustment signal to the speed sensor.

[0006] Furthermore, the PLC is connected to an input module, which is adapted to receive the adjustment signal output by the dynamic weighing integrator under test.

[0007] Furthermore, the PLC is also configured to transmit a speed setting signal to the motor to set the rotation parameters of the speed sensor, wherein the speed setting signal is independent of the adjustment signal.

[0008] Furthermore, it also includes an HMI, which is connected to the PLC.

[0009] Furthermore, the HMI is configured to control the start and stop of the motor.

[0010] Furthermore, the HMI is configured to be able to set at least one of the clockwise and counterclockwise speeds of the motor.

[0011] Furthermore, the motor is a servo motor.

[0012] Furthermore, the PLC, the dynamic weighing integrator to be tested, the motor, and the speed sensor are integrated into a single workbench.

[0013] The dynamic weighing integrator testing system according to this embodiment connects the dynamic weighing integrator under test to a speed sensor to receive the speed output signal from the speed sensor. The dynamic weighing integrator under test performs PID control based on the speed value of the output signal and a preset value, obtaining an adjustment signal, which is then transmitted to a PLC. The PLC sets the rotation parameters of the motor connected to it based on the adjustment signal, and then adjusts the speed of the speed sensor connected to the motor. The speed sensor then transmits the adjusted speed value back to the dynamic weighing integrator. This cycle repeats. By checking the adjustment signal value of the dynamic weighing integrator, it can be determined whether the speed value has been successfully adjusted to the preset value, thus confirming whether the PID control function of the dynamic weighing integrator under test is operating normally. As can be seen, this testing system eliminates the need for a complex and bulky transportation mechanism, allowing for the testing of the PID function of the dynamic weighing integrator.

[0014] In addition, the system can also directly set the speed parameters of the speed sensor through the PLC, thereby assisting in the functional testing of the dynamic weighing instrument under test. Attached Figure Description

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:

[0016] Figure 1 This is a schematic diagram of the structure of a test system for testing a dynamic weighing integrator in the prior art;

[0017] Figure 2 This is a schematic diagram of the structure of a dynamic weighing integrator testing system according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of a dynamic weighing integrator testing system according to another embodiment of the present invention;

[0019] The reference numerals in the attached figures are as follows:

[0020] 1. Dynamic weighing integrator to be tested

[0021] 10 PLC

[0022] 20 motors

[0023] 30 speed sensors

[0024] 40 HMI

[0025] 100 load cells

[0026] 200 transportation agencies Detailed Implementation

[0027] To make the objectives, technical solutions and advantages of this utility model clearer, the following embodiments will be used to further describe this utility model in detail.

[0028] Figure 1 This is a schematic diagram of the structure of a test system for testing a dynamic weighing integrator in the prior art;

[0029] like Figure 1 In the prior art shown, testing the function of the dynamic weighing integrator 1 requires placing it within a large system, mainly consisting of a conveyor mechanism 200, a load cell 100, and a speed sensor 30. The conveyor mechanism 200 is used to control the material feeding speed and feed rate. Common conveyor mechanisms 200 include belt conveyors and screw conveyors, and a suitable conveyor mechanism 200 is usually selected based on the characteristics of different materials. The load cell 100 is used to detect the weight of the material in real time. Generally, a load sensor is used. Through the contact between the sensor and the material, the weight of the material is converted into an electrical signal and transmitted to the dynamic weighing integrator 1. The speed sensor 30 is used to measure the rotational speed of the belt and transmits the rotational speed signal to the dynamic weighing integrator 1. The dynamic weighing integrator 1, based on the input of the load cell 100, the input of the speed sensor, and the PID setpoint, adjusts the speed of the belt in the conveyor mechanism 200 to achieve a fixed flow rate or a constant weighing load.

[0030] As can be seen, this type of testing system requires a large space and maintenance, and factors such as material flowability, viscosity, and storage must also be considered. Furthermore, employee safety is a concern during operation. Therefore, this invention aims to address these issues by providing a simple, easy-to-maintain, and easy-to-implement dynamic weighing integrator testing system.

[0031] Figure 2 A schematic diagram of the structure of the dynamic weighing integrator test system according to an embodiment of the present invention is shown;

[0032] like Figure 2 As shown, the testing system includes a PLC 10, a dynamic weighing integrator 1 under test, a motor 20, and a speed sensor 30. The dynamic weighing integrator 1 under test is connected to the speed sensor 30 to receive the speed output signal from the speed sensor 30. The PLC 10 is connected to the dynamic weighing integrator 1 under test to receive the adjustment signal from the dynamic weighing integrator 1 under test. The adjustment signal is a signal generated by the dynamic weighing integrator 1 under test through PID control based on an internal preset value and the value of the speed output signal. The PLC 10 is also connected to the motor 20 to transmit the adjustment signal value of the adjustment signal received from the dynamic weighing integrator 1 under test to the motor 20. The motor 20 is connected to the speed sensor 30 to transmit the adjustment signal value of the adjustment signal to the speed sensor 30.

[0033] Based on this embodiment, the operator pre-sets a preset value (setpoint) in the dynamic weighing integrator under test. The integrator is connected to a speed sensor to receive its output speed signal, thus obtaining the current speed value. An adjustment signal is obtained by comparing the current speed value with the preset value (setpoint). Simultaneously, the integrator is connected to a PLC, which is then connected to a motor and the speed sensor. The adjustment signal value is transmitted to the motor and further to the speed sensor, thereby adjusting the speed of the speed sensor. This process is repeated. By observing the adjustment signal value of the dynamic weighing integrator, the operator can determine whether the current speed value of the speed sensor has been successfully adjusted to the preset value (setpoint), thus indicating whether the PID control function of the integrator is functioning correctly.

[0034] Based on the above embodiments, in another possible implementation, the PLC is connected to an input module, which is adapted to receive the adjustment signal output by the dynamic weighing integrator 1 under test. Here, the adjustment signal output by the dynamic weighing integrator 1 under test is an analog signal, and the input module is an analog signal receiving module.

[0035] Figure 3 A schematic diagram of the structure of a dynamic weighing integrator testing system according to another embodiment of the present invention is shown;

[0036] Based on this embodiment, the PLC 10 is also configured to transmit a speed setting signal to the motor 20 to set the rotation parameters of the speed sensor 30, wherein the speed setting signal is independent of the adjustment signal. Specifically, as shown... Figure 3As shown, the PLC 10 is disconnected from the dynamic weighing integrator 1 under test. The operator can directly set the motor parameters in the PLC 10, thereby setting the speed sensor. Here, the PLC and the dynamic weighing integrator 1 are in a disconnected state. This disconnection can be physical or non-physical, meaning the PLC does not need to obtain adjustment signals from the dynamic weighing integrator 1. In this embodiment, the rotation parameters of the motor and thus the speed sensor are set via the PLC, thereby performing auxiliary functional testing of the dynamic weighing integrator under test.

[0037] Based on the above embodiments, in another possible implementation, the dynamic weighing integrator testing system further includes an HMI40, which is connected to the PLC10. This allows the PLC to be operated via the HMI, enabling more direct control of the motor 20 and the speed sensor 30, as well as the setting and display of relevant parameters.

[0038] According to another embodiment of this utility model, the start and stop of the motor 20 are controlled based on the HMI. By setting the HMI to control the start and stop of the motor 20, the test program is controlled.

[0039] In another embodiment of this invention, at least one clockwise speed and a counterclockwise speed are set based on the HMI. Based on this embodiment, the clockwise or counterclockwise speed of the speed sensor 30 can be tested.

[0040] According to the dynamic weighing integrator testing system of this utility model embodiment, motor 20 is a servo motor to perform highly accurate parameter setting and control.

[0041] According to the dynamic weighing integrator testing system of this utility model embodiment, the PLC, the dynamic weighing integrator 1 under test, the motor 20, and the speed sensor 30 are integrated on a single workbench. This makes the entire testing system compact, requiring minimal space and simplifying wiring.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamic weighing integrator testing system, characterized in that, include: The system comprises a PLC (10), a dynamic weighing integrator (1) to be tested, a motor (20), and a speed sensor (30). The dynamic weighing integrator (1) to be tested is connected to the speed sensor (30) to receive the speed output signal output by the speed sensor (30). The PLC (10) to be tested is connected to the dynamic weighing integrator (1) to receive the adjustment signal output by the dynamic weighing integrator (1). The adjustment signal is a signal generated by the dynamic weighing integrator (1) to be tested through PID adjustment based on the internal preset value and the value of the speed output signal. The PLC (10) is also connected to the motor (20) to transmit the adjustment signal value of the adjustment signal received from the dynamic weighing integrator (1) to the motor (20). The motor (20) to be tested is connected to the speed sensor (30) to transmit the adjustment signal value of the adjustment signal to the speed sensor (30).

2. The dynamic weighing integrator testing system according to claim 1, characterized in that, The PLC (10) is connected to an input module, which is adapted to receive the adjustment signal output by the dynamic weighing integrator (1) under test.

3. The dynamic weighing integrator testing system according to claim 1 or 2, characterized in that, The PLC (10) is also configured to send a speed setting signal to the motor (20) to set the rotation parameters of the speed sensor (30), wherein the speed setting signal is independent of the adjustment signal.

4. The dynamic weighing integrator testing system according to claim 3, characterized in that, It also includes an HMI (40) which is connected to the PLC (10).

5. The dynamic weighing integrator testing system according to claim 4, characterized in that, The HMI (40) is configured to control the start and stop of the motor (20).

6. The dynamic weighing integrator testing system according to claim 4, characterized in that, The HMI (40) is configured to be able to set at least one clockwise speed and a counterclockwise speed of the motor (20).

7. The dynamic weighing integrator testing system according to claim 1, characterized in that, The motor (20) is a servo motor (20).

8. The dynamic weighing integrator testing system according to claim 1, characterized in that, The PLC (10), the dynamic weighing integrator (1), the motor (20), and the speed sensor (30) are integrated into a single workbench.

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