Grain purchase-sale-stock weighing PLC control system and method

Abstract

A grain purchase-sale-stock weighing PLC control system disclosed by the present invention comprises an upper computer, a PLC main controller and a plurality of sub-control units, each sub-control unit comprises a PLC sub-controller, a detection assembly and an execution assembly, the detection assembly is connected with the input end of the PLC sub-controller, the execution assembly is connected with the output end of the PLC sub-controller, and the PLC sub-controller is connected with the PLC main controller. The PLC sub-controller is in bidirectional communication connection with the PLC main controller, and the PLC main controller is in bidirectional communication connection with the upper computer. The invention further discloses a grain purchase-sale-stock weighing PLC control method, unattended operation and automatic weighing are achieved, the grain purchase-sale-stock management level is improved, the manual statistical error rate is reduced, the labor intensity and the grain storage cost are reduced, and economic benefits are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of grain and oil storage and preservation, and specifically relates to a PLC control system for grain purchase, sale and storage weighing, and also relates to a PLC control method for grain purchase, sale and storage weighing. Background Art

[0002] At present, the traditional grain storage weighing of grain requires the measurement of the overall weight of the vehicle, the weight of the grain transported, etc. The vehicle inspection time needs to be reasonably arranged and requires a lot of manual participation. There is a lack of effective management system, and the vehicles entering and leaving the grain storage cannot be effectively managed. The weighing site is chaotic and inefficient. The supervision mechanism is backward and prone to cheating, including personal weighing and internal cheating. These cheating behaviors are difficult to supervise and prevent, resulting in inaccurate weighing results. The labor cost is high: weighers are required to operate and record, increasing the company's operating costs. The weighing data cannot be recorded and managed in real time, and manual recording is required, which is prone to data omissions or errors. There are certain safety hazards in manual operation, and operational errors may lead to accidents, increasing work risks and safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a PLC control system for grain purchase, sale and storage weighing and a PLC control method for grain purchase, sale and storage weighing and in view of the above-mentioned problems existing in the prior art.

[0004] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0005] A PLC control system for grain purchase, sale and storage weighing comprises a host computer, a PLC main controller and a plurality of sub-control units, wherein the sub-control units comprise a PLC sub-controller, a detection component and an execution component, wherein the detection component is connected to the input end of the PLC sub-controller, the execution component is connected to the output end of the PLC sub-controller, the PLC sub-controller is connected to the PLC main controller for two-way communication, and the PLC main controller is connected to the host computer for two-way communication.

[0006] As mentioned above, the detection component includes an IC card reader / writer, which is used to read the vehicle owner information and upload it to the host computer through the PLC sub-controller and the PLC main controller in sequence.

[0007] As mentioned above, the detection component also includes a license plate recognition camera, which is used to recognize the license plate information and upload it to the host computer through the PLC sub-controller and the PLC main controller in sequence.

[0008] As mentioned above, the execution components include:

[0009] Outdoor display screen, used to receive vehicle owner information and license plate information sent by the host computer;

[0010] The entrance and exit barriers are used to receive the barrier opening signal sent by the host computer and lift the crossbar according to the barrier opening signal.

[0011] As mentioned above, the execution components also include:

[0012] Traffic signal light, used to receive the green light information sent by the host computer and light up the green light according to the green light information;

[0013] Outdoor speakers are used to receive and broadcast voice messages sent by the host computer.

[0014] As mentioned above, the execution components also include:

[0015] Infrared beam grating, used to monitor the vehicle's position on the truck scale and transmit it to the host computer;

[0016] Truck scales are used to measure vehicle weighing information and transmit it to the host computer.

[0017] As mentioned above, the execution components also include:

[0018] The cockpit snapshot camera is used to upload pictures taken in the cockpit to the host computer;

[0019] The roof snapshot camera is used to upload pictures taken in the cockpit and on the roof to the host computer.

[0020] A PLC control method for grain purchase, sale and storage weighing, comprising the following steps:

[0021] Step 1: When the vehicle reaches the entrance gate, the IC card reader reads the owner information of the IC card and transmits it to the host computer through the PLC sub-controller and PLC main controller in turn;

[0022] Step 2: The host computer compares the read owner information with the pre-entered owner information. If the owner information is consistent, the PLC main controller and the PLC sub-controller control the license plate recognition camera to recognize the license plate information.

[0023] Step 3: The license plate recognition camera transmits the recognized license plate information to the host computer through the PLC sub-controller and the PLC main controller in sequence;

[0024] Step 4: The host computer compares the received license plate information with the pre-entered license plate information. When the license plate information is consistent, the host computer controls the outdoor display screen to display the owner information and license plate information through the PLC main controller and PLC sub-controller in turn; controls the entrance and exit gate control railing to lift; controls the green light of the traffic signal light; and controls the outdoor speaker to play the vehicle scale voice;

[0025] Step 5: The vehicle passes through the entrance and exit gate and drives onto the truck scale;

[0026] Step 6: After the infrared beam grating detects that the vehicle is in position on the truck scale, the host computer controls the cockpit snapshot camera and the roof snapshot camera through the PLC main controller and the PLC sub-controller in turn to take pictures of the cockpit and the roof and transmit them back to the host computer; the host computer controls the truck scale to weigh the vehicle and transmits the obtained vehicle weighing information back to the host computer;

[0027] Step 7: After the host computer receives the vehicle weighing information:

[0028] The upper computer controls the entrance and exit gate control railings to lift up through the PLC main controller and PLC sub-controller, controls the green light of the traffic signal light to turn on, and controls the outdoor speakers to play the voice message for vehicles to leave as soon as possible;

[0029] Step 8: The vehicle exits through the entrance and exit gate.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention reads the owner's information through an IC card reader and recognizes the license plate through a license plate recognition camera, performs dual authentication of the owner's information and the license plate information, and ensures that the vehicle weighing information is consistent with the actual vehicle association;

[0032] 2. Automatically monitor the vehicle's position on the truck scale through infrared beam grating, and verify the position through the cockpit snapshot camera and the roof snapshot camera to ensure that the detected vehicle weighing information is correct. Automatically weigh the vehicle after it is in place, and realize automatic acquisition of vehicle weighing information;

[0033] 3. During the weighing process, traffic signal lights and outdoor speakers are used for sound and light indication to ensure the smooth progress of weighing;

[0034] 4. The present invention realizes unattended and automatic weighing to improve the management level of grain purchase, sale and storage, reduce the error rate of manual statistics, reduce labor intensity and grain storage costs, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a control principle block diagram of the present invention. DETAILED DESCRIPTION

[0036] In order to facilitate those skilled in the art to understand and implement the present invention, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] Embodiment 1:

[0038] like Figure 1 As shown, a PLC control system for grain purchase, sale and storage weighing includes a host computer, a PLC main controller and a plurality of sub-control units, the sub-control units are arranged in parallel with each other, and the model of the PLC main controller is Siemens S7-200Smart.

[0039] The upper computer is used for comprehensive management and control, for receiving the owner information read by the IC card reader, for receiving the license plate information recognized by the license plate recognition camera, for comparing the read owner information and license plate information with the pre-stored owner information and license plate information, for receiving the arrival information sent by the infrared beam grating, for receiving the cockpit pictures and roof pictures taken by the cockpit snapshot camera and the roof snapshot camera, for receiving the vehicle weighing information sent by the truck scale, for sending the gate opening signal to the entrance gate, for sending the green light signal to the traffic signal light, and for sending the voice information to the outdoor speaker.

[0040] The sub-control unit includes a PLC sub-controller, a detection component and an execution component. The model of the PLC sub-controller is Siemens S7-200 Smart (equipped with a dedicated wireless communication terminal DTD434M). The detection component is connected to the input end of the PLC sub-controller, the execution component is connected to the output end of the PLC sub-controller, the PLC sub-controller is connected to the PLC main controller for two-way communication, and the PLC main controller is connected to the host computer for two-way communication.

[0041] The detection component includes an IC card reader and a license plate recognition camera; the model of the IC card reader is DEKA D8; the model of the license plate recognition camera is Hikvision DS-TCG2A5-B. The IC card reader and the license plate recognition camera are respectively connected to the input end of the PLC sub-controller; the execution component includes an outdoor display screen, an entrance and exit gate, a traffic signal light, an outdoor speaker, an infrared grating, a cockpit snapshot camera, a roof snapshot camera, and a truck scale, and the outdoor display screen, the entrance and exit gate, the traffic signal light, the outdoor speaker, the infrared grating, the cockpit snapshot camera, the roof snapshot camera, and the truck scale are respectively connected to the output end of the PLC sub-controller.

[0042] The outdoor display screen receives the vehicle owner information and license plate information sent by the host computer; the entrance and exit gates receive the gate opening signal sent by the host computer, and lift the crossbar according to the gate opening signal; the traffic signal light receives the green light information sent by the host computer, and lights the green light according to the green light information; the outdoor speaker receives the voice information sent by the host computer and broadcasts it; the infrared beam grating monitors the vehicle's arrival information on the truck scale and transmits it to the host computer; the cockpit snapshot camera and the roof snapshot camera upload the pictures taken in the cockpit and the pictures taken on the roof to the host computer; the truck scale measures the vehicle's weighing information and transmits it to the host computer.

[0043] Embodiment 2:

[0044] A PLC control method for grain purchase, sale and storage weighing, comprising the following steps:

[0045] Step 1: When the vehicle drives to the entrance and exit gate, the IC card reader reads the owner information of the IC card, and the IC card reader transmits the collected owner information to the PLC sub-controller, and the PLC sub-controller transmits the owner information to the host computer through the PLC main controller;

[0046] Step 2: The host computer compares the read owner information with the pre-entered owner information. If the owner information is consistent, it issues a license plate reading instruction, which is then transmitted to the license plate recognition camera through the PLC main controller and the PLC sub-controller in turn, and controls the license plate recognition camera to recognize the license plate information.

[0047] Step 3: The license plate recognition camera transmits the recognized license plate information to the host computer through the PLC sub-controller and the PLC main controller in sequence;

[0048] Step 4: The upper computer checks the license plate information identified by the license plate recognition camera and compares it with the pre-entered license plate information, reads the owner information through the IC card reader, and recognizes the license plate through the license plate recognition camera, performing dual authentication of the owner information and license plate information to ensure that the vehicle weighing information is consistent with the actual vehicle. If the license plate information is consistent:

[0049] The host computer sends the owner information and license plate information to the outdoor display screen through the PLC main controller and PLC sub-controller in turn, and the outdoor display screen displays the owner information and license plate information;

[0050] The upper computer sends the gate opening signal to the entrance and exit gates through the PLC main controller and PLC sub-controller in sequence, and the entrance and exit gate control railings are lifted;

[0051] The host computer sends the green light signal to the traffic light through the PLC main controller and PLC sub-controller in turn. The green light of the traffic light is on, indicating that the vehicle can pass through the entrance and exit gate;

[0052] The upper computer sends the voice information to the outdoor speaker through the PLC main controller and the PLC sub-controller in turn. The outdoor speaker plays the voice information, and the voice information broadcasts the voice of the vehicle scale on the vehicle;

[0053] Step 5: The vehicle passes through the entrance and exit gate and drives onto the truck scale;

[0054] Step 6: Use infrared beam grating to monitor whether the vehicle is in place on the truck scale. After monitoring that the vehicle is in place on the truck scale:

[0055] The infrared beam grating transmits the vehicle arrival information to the host computer through the PLC sub-controller and the PLC main controller in turn. The host computer sends the shooting start signal to the cockpit snapshot camera and the roof snapshot camera through the PLC main controller and the PLC sub-controller in turn. The cockpit snapshot camera and the roof snapshot camera start shooting according to the shooting start signal, and transmit the cockpit pictures and the roof pictures to the host computer through the PLC sub-controller and the PLC main controller in turn. The host computer verifies the vehicle arrival information, the cockpit pictures and the roof pictures, automatically monitors the vehicle arrival information on the truck scale through the infrared beam grating, and verifies the arrival information through the cockpit snapshot camera and the roof snapshot camera to ensure that the detected vehicle weighing information is correct. After verification, the weighing instruction is sent to the truck scale through the PLC main controller and the PLC sub-controller in turn. After receiving the weighing instruction, the truck scale weighs the vehicle, and transmits the acquired vehicle weighing information to the host computer through the PLC sub-controller and the PLC main controller in turn.

[0056] Step 7: After the host computer receives the vehicle weighing information:

[0057] The upper computer sends the gate opening signal to the entrance and exit gates through the PLC main controller and PLC sub-controller in sequence, and the entrance and exit gate control railings are lifted;

[0058] The host computer sends the green light signal to the traffic light through the PLC main controller and PLC sub-controller in turn. The green light of the traffic light is on, indicating that the vehicle can pass through the entrance and exit gates to leave;

[0059] The upper computer sends the voice information to the outdoor speaker through the PLC main controller and PLC sub-controller in turn. The outdoor speaker plays the voice information, and the voice information broadcasts the voice of the vehicle leaving as soon as possible. During the weighing process, the traffic signal light and the outdoor speaker are used for sound and light indication to ensure the smooth progress of weighing.

[0060] Step 8: The vehicle passes through the entrance and exit gates and the weighing process is completed, thus realizing unmanned and automatic weighing to improve the management level of grain purchase, sales and storage, reduce the error rate of human statistics, reduce labor intensity and grain storage costs, and improve economic benefits.

[0061] It should be noted that the embodiments described in the present invention are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A PLC control system for grain purchase, sale and storage weighing, including a host computer, characterized in that: It also includes a PLC main controller and several sub-control units. The sub-control units include a PLC sub-controller, a detection component and an execution component. The detection component is connected to the input end of the PLC sub-controller, the execution component is connected to the output end of the PLC sub-controller, the PLC sub-controller is connected to the PLC main controller for two-way communication, and the PLC main controller is connected to the host computer for two-way communication.

2. According to claim 1, a PLC control system for grain purchase, sale and storage weighing, characterized in that: The detection component includes an IC card reader / writer, which is used to read the vehicle owner information and upload it to the host computer through the PLC sub-controller and the PLC main controller in sequence.

3. According to claim 2, a PLC control system for grain purchase, sale and storage weighing, characterized in that: The detection component also includes a license plate recognition camera, which is used to recognize the license plate information and upload it to the host computer through the PLC sub-controller and the PLC main controller in sequence.

4. According to claim 1, a PLC control system for grain purchase, sale and storage weighing, characterized in that: The execution components include: Outdoor display screen, used to receive vehicle owner information and license plate information sent by the host computer; The entrance and exit barriers are used to receive the barrier opening signal sent by the host computer and lift the crossbar according to the barrier opening signal.

5. According to claim 4, a PLC control system for grain purchase, sale and storage weighing, characterized in that: The execution component also includes: Traffic signal light, used to receive the green light information sent by the host computer and light up the green light according to the green light information; Outdoor speakers are used to receive and broadcast voice messages sent by the host computer.

6. A PLC control system for grain purchase, sale and storage weighing according to claim 5, characterized in that: The execution component also includes: Infrared beam grating, used to monitor the vehicle's position on the truck scale and transmit it to the host computer; Truck scales are used to measure vehicle weighing information and transmit it to the host computer.

7. A PLC control system for grain purchase, sale and storage weighing according to claim 6, characterized in that: The execution component also includes: The cockpit snapshot camera is used to upload pictures taken in the cockpit to the host computer; The roof snapshot camera is used to upload pictures taken in the cockpit and on the roof to the host computer.

8. A PLC control method for grain purchase, sale and storage weighing, characterized in that: The following steps are involved: Step 1: When the vehicle reaches the entrance gate, the IC card reader reads the owner information of the IC card and transmits it to the host computer through the PLC sub-controller and PLC main controller in turn; Step 2: The host computer compares the read owner information with the pre-entered owner information. If the owner information is consistent, the PLC main controller and the PLC sub-controller control the license plate recognition camera to recognize the license plate information. Step 3: The license plate recognition camera transmits the recognized license plate information to the host computer through the PLC sub-controller and the PLC main controller in sequence; Step 4: The host computer compares the received license plate information with the pre-entered license plate information. When the license plate information is consistent, the host computer controls the outdoor display screen to display the owner information and license plate information through the PLC main controller and PLC sub-controller in turn; controls the entrance and exit gate control railing to lift; controls the green light of the traffic signal light; and controls the outdoor speaker to play the vehicle scale voice; Step 5: The vehicle passes through the entrance and exit gate and drives onto the truck scale; Step 6: After the infrared beam grating detects that the vehicle is in position on the truck scale, the host computer controls the cockpit snapshot camera and the roof snapshot camera through the PLC main controller and the PLC sub-controller in turn to take pictures of the cockpit and the roof and transmit them back to the host computer; the host computer controls the truck scale to weigh the vehicle and transmits the obtained vehicle weighing information back to the host computer; Step 7: After the host computer receives the vehicle weighing information: The upper computer controls the entrance and exit gate control railings to lift up through the PLC main controller and PLC sub-controller, controls the green light of the traffic signal light to turn on, and controls the outdoor speakers to play the voice message for vehicles to leave as soon as possible; Step 8: The vehicle exits through the entrance and exit gate.

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