Sorting valve balance control method of weighing sorting machine

Abstract

The invention discloses a sorting valve balance control method for a weighing sorting machine. The sorting valve balance control method comprises a balance distribution strategy based on historical statistics and a sorting valve control method based on a virtual clock. According to the balanced distribution strategy based on historical statistics, before weighing is started, the load of the sorting valves is balanced and adjusted by means of historical specification statistics of selected varieties, specification interval division expectation and reverse matching with action accumulative distribution of the sorting valves, and excessive use is avoided; according to the sorting valve control method based on the virtual clock, in the weighing process, the virtual clock is distributed through the software technology to manage the trigger period of the sorting valve, inching control is changed into continuous control, the action frequency of the sorting valve is reduced, the service life of the sorting valve is prolonged, and the weighing time is calculated.

Description

Technical Field

[0001] The present invention relates to the field of food machinery, and in particular to a method for balancing control of a sorting valve of a weighing and sorting machine. Background Art

[0002] With the continuous development of automation technology, the requirements for material sorting and processing in modern industrial production are getting higher and higher. In the traditional weighing and sorting system, the sorting valve is a key component used to complete the material sorting task. Its main function is to accurately distribute the material to the specified interval according to the weighing result. However, due to the high working frequency of the sorting valve, if the load is unevenly distributed, it is easy to cause the sorting valve to be used frequently, which not only affects the overall performance of the system, but also may shorten the service life of the sorting valve.

[0003] Existing control methods usually rely on simple periodic trigger mechanisms or mechanical control strategies. Although this method can ensure a certain degree of work efficiency, it is often unable to achieve intelligent adjustment when the load is uneven or the material specifications change. Therefore, how to achieve precise control of the sorting valve action and load balancing while ensuring system stability and efficiency has become an important research direction for improving the performance of the weighing and sorting system.

[0004] In view of the above problems, the present invention proposes a sorting valve balancing control method for a weighing and sorting machine on a microcontroller platform. The method combines a balanced allocation strategy based on historical statistics and a sorting valve control method based on a virtual clock, aiming to improve the sorting accuracy and efficiency, extend the service life of the sorting valve and optimize the performance of the entire system by intelligently adjusting the workload and control cycle of the sorting valve. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a control method for a weighing and sorting machine, which can effectively solve at least one of the above problems. The balanced allocation strategy based on historical statistics and the sorting valve control method based on a virtual clock are used to avoid excessive use of the sorting valve, reduce the action frequency of the sorting valve, and increase the service life of the sorting valve and the time for calculating weighing.

[0006] The technical solution of the present invention is: a sorting valve balancing control method for a weighing and sorting machine, using an embedded industrial controller platform, the system consists of a data acquisition module, a data processing module, a control and execution module and a user interface, and the system operation process is divided into initial configuration, task execution, and data update.

[0007] The embedded industrial controller platform uses the STM32F103RET6 chip, uses the UART serial port to connect to the 4G transmission module, the SPI to connect to the weighing sensor module, the GPIO_EXT to connect to the photoelectric input module, and the GPIO is extended using a shift register.

[0008] The embedded industrial controller platform uses the ModBus communication interface and the FreeRTOS operating system.

[0009] The data acquisition module includes a single-point weighing sensor, a dynamic load not exceeding 3kg, a 24-bit Sigma-Delta A / D converter, a photoelectric signal sensor, etc.

[0010] The data processing module includes a hardware operator, a probability model processing, a sampling filter processing, a storage unit, etc.

[0011] The control and execution module includes a sorting valve controller. The sorting valve is a direct-acting micro solenoid valve with a response time of less than 10ms, a maximum action frequency of 20 times, an operating voltage of 24V, and drives the sorting valve and controls the trigger interval to realize continuous control logic.

[0012] The user interface includes a touch screen, and the interface includes a weighing calibration and pallet calibration interface, a variety specification configuration interface, and a system operation and monitoring interface.

[0013] The system's operating performance indicators include a data collection cycle of less than 70ms, a computing efficiency of less than 30ms, a corresponding control time of less than 10ms, and an overall task execution efficiency of 200 times / minute.

[0014] The life protection mechanism of the sorting valve increases the operating life by 3 to 4 times compared with the original strategy when the probability of continuous moments is 30% and the number of triggers per second is 5.

[0015] By combining historical data analysis with virtual clock technology, the control process of the sorting machine has been optimized, which not only improves the accuracy and efficiency of sorting, but also enhances the intelligence and convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and examples:

[0017] Figure 1 It is a single chip microcomputer software control platform.

[0018] Figure 2 It is a schematic diagram of the sorting valve balancing strategy.

[0019] Figure 3 It is a schematic diagram of the sorting valve control method.

[0020] Figure 4 This is a diagram illustrating the weighing and sorting process. DETAILED DESCRIPTION

[0021] like Figure 1As shown, the single-chip control component includes a data acquisition module, a data processing module, a control and execution module and a user interface. The operator can configure the specifications in the user interface. After completion, the data processing module stores the information.

[0022] like Figure 2 As shown, the data processing module system performs reverse matching based on the historical specification probability distribution of the variety and the cumulative sorting valve actions, and then displays the grouping results on the screen and installs and stores them according to the grouping results.

[0023] Furthermore, the system can calibrate all pallets by idling for one cycle.

[0024] Furthermore, the working mode of the cleaning valve, 0 represents normally open, 1 represents controlled open, and 2 represents normally closed.

[0025] like Figure 3 As shown, when the sampling weight is updated, all trigger clocks are also updated synchronously, and the sorting valve is triggered when it detects that the clock zero bit is 1.

[0026] Furthermore, after the weight sensor sampling is denoised, the mean is calculated, and the triggering time of the sorting valve is calculated after comparing the specifications. After the triggering clock is updated, the sorting valve time is recorded.

[0027] Furthermore, when the sorting valve is triggered, the recycling module will check the next trigger clock. If it is 1, the recycling module will not process it, otherwise it will start recycling.

[0028] like Figure 4 As shown, the system drives the software to run through weight sensor sampling and controls the sorting valve to complete the weighing and sorting tasks.

[0029] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A method for balancing the sorting valve of a weighing and sorting machine, characterized in that: It includes a balanced allocation strategy based on historical statistics and a sorting valve control method based on a virtual clock; the balanced allocation strategy based on historical statistics uses the specification distribution function of the selected variety to predict the probability density of the configuration specification interval, and reversely matches it with the cumulative distribution of the sorting valve's action to avoid excessive use; the sorting valve control method based on a virtual clock allocates a virtual clock to manage the triggering period of the sorting valve through software technology, which can change the sorting valve's inching control into continuous control and reduce the sorting valve's action frequency.

2. The method for controlling the balanced sorting valve of a weighing and sorting machine according to claim 1, characterized in that: The balanced allocation strategy based on historical statistics, after configuring the variety specifications, the system predicts the probability density of the corresponding specifications of the variety according to the historical specification distribution function of the variety, and reversely matches it with the sorting valve actions. The sorting valve number of the corresponding specification is prompted to the user by the system prompt to store the corresponding position.

3. The method for controlling the balanced sorting valve of a weighing and sorting machine according to claim 1, characterized in that: The virtual clock signal is generated by a signal sensor located in front of the weighing device. When the tray moves in front of the weighing device, the signal is detected, the virtual clock is recorded as 1, and the trigger clock in the sorting valve is reduced by 1.

4. The method for controlling the balance of the sorting valve of a weighing and sorting machine according to claim 3 is characterized in that: The trigger clock in the sorting valve is stored in a bitmap. After the weighing value is divided into corresponding specifications, the triggering moment is obtained by the sorting valve number of the corresponding specification. The virtual clock first controls the bitmap to shift cyclically to the left, and sets the corresponding position of the bitmap of the corresponding sorting valve to 1. When the trigger signal is detected at the zero position, the sorting valve is controlled to act.

5. The method for controlling the balance of the sorting valve of a weighing and sorting machine according to claim 4, characterized in that: The method for controlling the action of the sorting valve is as follows: before the sorting valve is actuated, checking whether the timing of the trigger clock in the sorting valve is continuous; when it is determined that the trigger timing in the sorting valve is continuous, maintaining the trigger state of the sorting valve until the timing of the trigger clock is discontinuous, and retracting the sorting valve.

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