A board counter

Abstract

The utility model belongs to the technical field of assembly line counter, specifically disclose a board counter, including infrared emission module, infrared receiving module, timepiece, alarm, two laser range sensors, two diffuse reflection photoelectric switch, swivel support and controller, when the board passes through the light path of infrared emission module and infrared receiving module, infrared receiving module exports the counting pulse to the controller, gathers the time of counting pulse through timepiece, obtains the board pose on the transmission zone through laser range sensor, then whether existence many boards on the transmission zone is detected through swivel support drive two diffuse reflection photoelectric switch rotation, the utility model discloses can identify the edge or overlap of the board on the transportation production line and output alarm signal and decelerate or stop to the transmission zone through alarm, make the on -the -spot worker can in time to the edge or overlap board rectification, ensure the transportation efficiency of board.

Description

Technical Field

[0001] This utility model belongs to the field of assembly line counter technology, and specifically relates to a plate counter. Background Technology

[0002] In timber and metal sheet processing production lines, accurate and real-time output statistics are of great significance for ensuring production plans, improving efficiency, and detecting faults.

[0003] Current methods for counting wood and metal sheets mostly rely on mechanical levers or manual recording, which are not only prone to errors and inefficient, but also unsuitable for high-speed production lines. Infrared counters are counting devices used on conveyor belts of production lines, including through-beam and reflective counters. The former uses infrared transmitters and receivers installed on both sides of the conveyor belt in the direction of transport. When an object passes through the light path of the infrared transmitter and receiver, the light path is blocked, and the receiver circuit outputs a pulse signal to trigger the counting circuit. The latter integrates the transmitter and receiver into a single infrared probe. When an object appears in front of the probe, the transmitter emits infrared light to the receiver, which outputs a pulse to the counting circuit, thus enabling the counting of sheets on the production line.

[0004] However, during assembly line transportation, the boards are not arranged in a strictly uniform and equidistant manner. When vibration, jamming, or delays occur in a certain process, some boards may become connected at the edges or overlap. These connected or overlapping boards can introduce errors into the picking and transfer of boards in subsequent transportation processes, causing a series of chain reactions that affect the production speed of the entire board transportation production line, and may even cause the production line to collapse. For example, when the robotic arm picks up a board with connected edges, it may misidentify the core material of the board, resulting in a failed pick-up and the board falling. Subsequent boards will continue to be transported, causing more boards to accumulate. Also, overlapping boards may be unable to pass through the transportation channel of a certain link due to height issues, causing blockages in that link's transportation channel. Existing infrared counters can only detect whether boards have passed by and count them; they cannot identify connected or overlapping boards. Summary of the Invention

[0005] The purpose of this invention is to provide a board counter that can identify connected or overlapping boards and output an alarm signal to remind on-site personnel.

[0006] To achieve the above objectives, this utility model provides a board counter, which is installed on a board transport production line used for transporting boards. The board counter includes:

[0007] An infrared emitting module and an infrared receiving module are respectively located on opposite sides of the sheet metal conveying production line; a timer and a controller are connected to the timer; two laser rangefinders are arranged front and rear on the sides of the sheet metal conveying production line; two diffuse reflection photoelectric switches and a rotating bracket are arranged behind the installation position of the infrared emitting module, and the two diffuse reflection photoelectric switches are respectively located on opposite sides of the rotating bracket; an alarm is provided, and the control end of the conveyor belt, the alarm, the infrared receiving module, the laser rangefinders, and the diffuse reflection photoelectric switches are respectively connected to the controller.

[0008] Preferably, the above technical solution further includes an ADC module, wherein the two laser ranging sensors are respectively connected to the input terminal of the ADC module, and the output terminal of the ADC module is connected to the controller.

[0009] Preferably, in the above technical solution, the rotating support includes a frame, a connecting plate, a motor, and a tilt sensor. The motor is located in the middle of the crossbeam of the frame, and its shaft is connected to the connecting plate. The tilt sensor is located on the connecting plate. The tilt sensor and the motor are respectively connected to the controller. The two diffuse reflection photoelectric switches are respectively located on opposite sides of the connecting plate.

[0010] Preferably, in the above technical solution, the rotating bracket further includes a limiting ring, which is fixedly connected to the frame body by bolts. The limiting ring is provided with an annular groove, and the connecting plate is provided with two cylinders that pass through the annular groove.

[0011] Preferably, in the above technical solution, the infrared receiving module includes an infrared receiving circuit and a counting circuit, the infrared receiving circuit is connected to the input terminal of the counting circuit, and the output terminal of the counting circuit is connected to the controller.

[0012] Preferably, in the above technical solution, the infrared receiving circuit includes an infrared receiving tube and a first resistor; the counting circuit includes a second resistor, a third resistor, a filter capacitor, a Schmitt trigger, a transistor, and a counter; one end of the infrared receiving tube is connected to one end of the first resistor, and the other end is connected to a power supply; the other end of the first resistor is connected to a ground terminal; the base of the transistor is connected to one end of the infrared receiving tube through the second resistor; the collector of the transistor is connected to one end of the third resistor; the other end of the third resistor is connected to a power supply; the emitter of the transistor is connected to a ground terminal; the filter capacitor is connected in parallel with the first resistor; the input terminal of the Schmitt trigger is connected to the collector of the transistor; the output terminal of the Schmitt trigger is connected to the input terminal of the counter; and the output terminal of the counter is connected to the controller.

[0013] Preferably, the above technical solution further includes a button module, which is connected to the controller.

[0014] Preferably, the above technical solution further includes an electronic display and a wireless communication module, wherein the electronic display is wirelessly connected to the wireless communication module, and the wireless communication module is connected to the controller.

[0015] Compared with existing technologies, this utility model has the following beneficial effects.

[0016] 1. This utility model uses an infrared emitting module and an infrared receiving module to identify the sheet material on the conveyor belt. A timer records the time it takes for the sheet material to pass through the infrared emitting and receiving modules. When this time exceeds a user-set threshold, the controller controls two laser ranging sensors to collect the edge distance data between the sheet material and the conveyor belt. Based on this edge distance data, the controller obtains the position and orientation of the sheet material on the conveyor belt. Then, a rotating bracket drives two diffuse reflection photoelectric switches to scan and detect the sheet material on the conveyor belt, detecting whether there is a second sheet material on the conveyor belt. This realizes the detection of connected or overlapping sheet materials on the sheet material transportation production line. An alarm is output through an alarm device, and the controller controls the conveyor belt to slow down or stop, so as to remind on-site personnel to correct the connected or overlapping sheet materials in a timely manner and ensure the stability of the sheet material transportation in subsequent processes.

[0017] 2. The controller of this utility model is connected to a wireless communication module, which is wirelessly connected to an electronic display. The controller sends counting data and alarm data to the electronic display through the wireless communication module, enabling on-site workers to quickly and intuitively grasp the operating status of the sheet material transportation production line.

[0018] 3. This utility model connects the controller and the button module. When faults such as edge continuation or overlap occur on the board transport production line, workers can manually adjust the count value of the board counter by operating the button module to ensure the counting accuracy of the board counter. Attached Figure Description

[0019] Figure 1 A schematic diagram of the circuit structure of the board counter provided by this utility model.

[0020] Figure 2 This is a schematic diagram of the installation of the plate counter provided by this utility model.

[0021] Figure 3 is a diagram showing the position of the sheet metal provided by this utility model on the transportation production line.

[0022] In the diagram: 1—Infrared transmitting module, 2—Infrared receiving module, 3—Laser rangefinder sensor, 4—Diffuse reflection photoelectric switch, 5—Rotating bracket, 6—Button module, R2—First resistor, R3—Second resistor, R4—Third resistor, C1—Filter capacitor, Q1—Transistor, U1—Schmitt trigger, U2—Counter, 100—Controller, 101—Electronic display, 102—Alarm, 103—Timer, 104—ADC module, 105—Wireless communication module, 501—Connecting board, 502—Limiting ring, 503—Motor, 504—Tilt sensor. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0024] refer to Figure 1 As shown in Figure 3, a board counter is installed on a board transport production line used to transport boards. The board counter includes: an infrared emitting module 1, an infrared receiving module 2, two laser rangefinders 3, two diffuse reflection photoelectric switches 4, a rotating bracket 5, a button module 6, a controller 100, an electronic display 101, an alarm 102, a timer 103, an ADC module 104, and a wireless communication module 105.

[0025] Infrared emitting module 1 and infrared receiving module 2 are respectively located on opposite sides of the sheet metal conveying production line. Infrared receiving module 1 is connected to controller 100. Infrared receiving module 1 includes an infrared receiving circuit and a counting circuit. The input terminal of the infrared receiving circuit is connected to the input terminal of the counting circuit, and the output terminal of the counting circuit is connected to controller 100. Specifically, the infrared receiving circuit includes an infrared receiving tube D1 and a first resistor R2. The infrared receiving tube D1 is used to receive the infrared light emitted by the infrared emitting tube D2 of infrared emitting module 1. One end of the infrared receiving tube D1 is connected to the power supply terminal VCC, and the other end is connected to the first resistor R2. The other end of the first resistor R2 is connected to the ground terminal GND. The counting circuit includes a second resistor R3, a third resistor R4, a filter capacitor C1, a Schmitt trigger U1, and a transistor Q1. The filter capacitor C1 is connected in parallel across the first resistor R2. The base of transistor Q1 is connected in series with the other end of infrared receiving tube D1 through the second resistor R3. The collector of transistor Q1 is connected to the power supply terminal VCC through the third resistor R4. The emitter of transistor Q1 is connected to the ground terminal GND. The collector of transistor Q1 is connected to the input of Schmitt trigger U1, the output of Schmitt trigger U1 is connected to the input of counter U2, and the output of counter U2 is connected to controller 100. In this embodiment, the module transistor Q1 is an NPN transistor, and the Schmitt trigger U1 can be a timing chip of model NE555. The THR threshold pin and TRI trigger pin of the NE555 timing chip are connected in parallel and connected to the collector of transistor Q1. The Rst reset pin is connected to the power supply VCC, and the CON discharge pin is connected to the ground GND through a capacitor. The counter U2 can be a counter chip of model CD4518. The OUT output pin is connected to the CLK input pin of counter U2. The Q0 to Q3 signal output pins of counter U2 are all connected to controller 100 to output the decimal count value of the board to controller 100. The EN enable pin of counter U2 is connected to the power supply VCC. The controller 100 can be a microcontroller of model STC89352.

[0026] When a sheet material passes through and blocks the optical path between the infrared emitting module 1 and the infrared receiving module 2, the beam received by the infrared receiving tube D2 from the infrared emitting tube D1 of the infrared emitting module is blocked. The resistance of the infrared receiving tube D2 decreases, and the voltage across the first resistor R2 (i.e., the voltage input to the second resistor R3) increases. Transistor Q1 turns on, and the voltage at the collector of transistor Q1 increases. At this time, the OUT pin of the Schmitt trigger U1 outputs a high level, which is equal to VCC. The CLK pin of the counter U2 is also high. When the sheet material leaves the optical path between the infrared emitting module and the infrared receiving module, the resistance of the infrared receiving tube D2 increases, and the voltage across the first resistor R2 (i.e., the voltage input to the second resistor R3) decreases. Transistor Q1 turns off, and the voltage at the collector of transistor Q1 decreases. The OUT pin of the Schmitt trigger U1 outputs a low level (0V), and the CLK pin of the counter U2 becomes low. Thus, one counting pulse is completed, and the output of the counter U2 is incremented by one, thereby completing the counting of the passing sheet material.

[0027] The timer 103 is connected to the controller 100. The timer 103 is used to record the time it takes for the board to pass through the optical path between the infrared emitting module 1 and the infrared receiving module 2. In this embodiment, the timer 103 can be a clock chip of model DS3231.

[0028] Two laser rangefinders 3 are positioned on the side of the sheet metal conveying production line, behind the infrared emitting module 1. The two laser rangefinders 3 are connected to the input terminals of the ADC module 104, and the output terminals of the ADC module 104 are connected to the controller 100. The two laser rangefinders 3 collect the distance between the sheet metal and the conveyor belt during transport and output an analog voltage to the ADC module 104, which converts it into a digital quantity and outputs it to the controller 100. The controller 100 converts the analog voltage into a distance according to the distance conversion formula. In this embodiment, the laser rangefinders 3 can be HG-C1400 laser displacement sensors, and the ADC module 104 can be an ADS1115 ADC chip.

[0029] The rotating bracket 5 is located behind the installation position of the infrared emitting module 1. In specific implementation, the rotating bracket 5 is spaced apart from the infrared emitting module 1 by the width of a plate. Two diffuse reflection photoelectric switches 4 are respectively located on opposite sides of the rotating bracket 5. The diffuse reflection photoelectric switches 4 and the rotating bracket 5 are respectively connected to the controller 100. The rotating bracket 5 drives the two diffuse reflection photoelectric switches 4 to rotate, thereby scanning and detecting whether there is a plate on the conveyor belt. In specific implementation, the diffuse reflection photoelectric switches 4 can be selected as infrared photoelectric sensors of model M12. When the reflection photoelectric switch 4 detects the presence of a plate on the conveyor belt, it outputs a high level to the controller 100; otherwise, it outputs a low level to the controller 100.

[0030] The controller 100 is connected to the control end of the conveyor belt of the sheet metal transport production line to realize speed regulation and start / stop control of the conveyor belt.

[0031] The rotating support 5 includes a frame, a connecting plate 501, a motor 503, and a tilt sensor 504. The motor 503 is located in the middle of the crossbeam of the frame, and its shaft is connected to the connecting plate 501. The tilt sensor 504 is located on the connecting plate 501. The tilt sensor 504 and the motor 503 are respectively connected to the controller 100. Two diffuse reflection photoelectric switches 4 are respectively located on opposite sides of the connecting plate 501. The motor 503 drives the connecting plate 501 to rotate, and the connecting plate 501 drives the two diffuse reflection photoelectric switches 4 to scan the conveyor belt to detect whether there is a board material. The tilt sensor 504 is used to record the angle of rotation of the connecting plate 501 driven by the motor 503. The tilt sensor 504 can be of model ADXL345. The length of the connecting plate 501 can be set to three-quarters of the length of the board material.

[0032] The rotating bracket 5 also includes a limiting ring 502, which is fixedly connected to the frame body by bolts. The limiting ring 502 is provided with an annular groove, and the connecting plate 501 is provided with two cylinders that pass through the annular groove. By setting the limiting ring 502, the stability of the motor 503 when driving the connecting plate 501 to rotate is ensured, and the shaking of the connecting plate 501 is prevented from affecting the accuracy of the detection plate of the two diffuse reflection photoelectric switches 4.

[0033] The wireless communication module 105 and the alarm 102 are respectively connected to the controller 100. The wireless communication module 105 is wirelessly connected to the electronic display 101. The controller 100 sends counting data and alarm data to the electronic display 101 through the wireless communication module 105, so that the on-site workers can quickly and intuitively grasp the operating status of the board transport production line. In this embodiment, the electronic display 101 consists of a display, a microcontroller and a wireless communicator corresponding to the wireless communication module 105. The wireless communication module 105 and the wireless communicator of the electronic display 101 can be selected as a wireless radio frequency module of model NRF2401. The alarm 102 can be an audible and visual alarm device consisting of a speaker and an LED light.

[0034] The controller 100 is connected to the button module 6 to correct the count value of the board counter via the button module 6.

[0035] Referring to Figure 3, the counting process for the sheet metal in this invention is as follows:

[0036] Step 1: When a piece of material passes through the optical path between infrared emitting module 1 and infrared receiving module 2, infrared receiving module 2 outputs a counting pulse to controller 100. Controller 100 increments the count value of the material by one and records the time of the counting pulse through timer 103, denoted as _____. When the counting pulse time exceeds the user-defined threshold time When the controller 100 determines that two plates may pass through in this counting pulse, the controller 100 executes step two.

[0037] Controller 100 reads the laser displacement monitoring module 3 in The distance between the board and the edge of the conveyor belt at the moment (i.e., the moment the board just leaves the optical path between infrared emitting module 1 and infrared receiving module 2) is recorded as follows: [The distances collected by the two laser ranging sensors 3 are then recorded as follows]. and And let the width of the transmission belt be . .

[0038] The initial position of the connecting plate 501 is as follows: Figure 3a As shown, initially, the side of the connecting plate 501 is parallel to the side of the conveyor belt.

[0039] when At that time, the position of the board on the conveyor belt is as follows: Figure 3a As shown, if the controller 100 detects that not both diffuse reflection photoelectric switches 4 are at a high level, the controller 100 determines that only one board has passed through in this counting pulse. When the controller 100 detects that both diffuse reflection photoelectric switches 4 are at a high level, the controller 100 determines that there are two or more boards in this counting pulse.

[0040] when At that time, the controller 100 first calculates the tilt of the plate on the conveyor belt using trigonometric functions. In specific implementation, it records... The angle between the board and the edge is , The calculation formula is : In the formula, To determine the installation spacing between the two laser rangefinders 3, the controller 100 controls the motor 503 to rotate the connecting plate 501 clockwise. Degree, the position of connecting plate 501 is as follows Figure 3b As shown, if the outputs of both diffuse reflection photoelectric switches 4 are low, the controller 100 determines that only one board has passed through in this counting pulse. When the controller 100 detects that the outputs of the two diffuse reflection photoelectric switches 4 are opposite, the controller 100 determines that the board in this counting pulse has a connecting edge or overlap.

[0041] In this example, the rotational speed of motor 503 is higher than the transmission speed of the conveyor belt. Therefore, when motor 503 drives the connecting plate 501 to rotate, the detection results of the two diffuse reflection photoelectric switches 4 can be approximated by the plate's rotation speed. The position of the device on the conveyor belt at any given time.

[0042] when At that time, controller 100 according to the formula calculate The controller 100 controls the motor 503 to rotate the connecting plate 501 clockwise at the angle with the edge of the plate. The position of the connecting plate 501 is as follows: Figure 3c As shown, when the outputs of both diffuse reflection photoelectric switches 4 are low, the controller 100 determines that only one board has passed through in this counting pulse. When the controller 100 detects that the outputs of the two diffuse reflection photoelectric switches 4 are opposite, the board has a connection or overlap.

[0043] Step 3: When the controller 100 detects that the board has a continuous edge or overlap as detected in Step 2, the controller 100 controls the conveyor belt corresponding to the counter of the detected continuous edge or overlap to slow down or stop, and controls the alarm 102 to output an audible and visual alarm signal to remind the on-site workers to maintain the board transport production line, promptly identify and eliminate faulty links, and ensure the production efficiency of the board transport production line. On-site personnel operate the button module 6 according to the actual number of boards passing through, and the controller 100 reads the input value of the button module 6 and corrects the board count value to ensure the counting accuracy of the board counter.

[0044] It is worth noting that the method of collecting the displacement of the plate by a distance measuring sensor and calculating the tilt of the plate on the conveyor belt by combining trigonometric functions in step two is an existing technology.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A board counter, installed on a board transport production line for transporting boards, characterized in that, include: An infrared emitting module and an infrared receiving module are respectively located on opposite sides of the sheet metal transport production line; A timer and a controller, wherein the controller is connected to the timer; Two laser rangefinders are positioned at the front and rear of the sides of the sheet metal transport production line. Two diffuse reflection photoelectric switches and a rotating bracket are provided. The rotating bracket is located behind the installation position of the infrared emitting module, and the two diffuse reflection photoelectric switches are respectively located on opposite sides of the rotating bracket. An alarm device, a rotating bracket, an infrared receiving module, a control end of a transmission belt, a laser rangefinder, and a diffuse reflection photoelectric switch are respectively connected to the controller.

2. The plate counter according to claim 1, characterized in that, It also includes an ADC module, with the two laser ranging sensors respectively connected to the input terminal of the ADC module, and the output terminal of the ADC module connected to the controller.

3. The plate counter according to claim 1, characterized in that, The rotating support includes a frame, a connecting plate, a motor, and a tilt sensor. The motor is located in the middle of the crossbeam of the frame, and its shaft is connected to the connecting plate. The tilt sensor is located on the connecting plate. The tilt sensor and the motor are respectively connected to the controller. The two diffuse reflection photoelectric switches are respectively located on opposite sides of the connecting plate.

4. The plate counter according to claim 3, characterized in that, The rotating bracket also includes a limiting ring, which is fixedly connected to the frame body by bolts. The limiting ring is provided with an annular groove, and the connecting plate is provided with two cylinders that pass through the annular groove.

5. The plate counter according to claim 1, characterized in that, The infrared receiving module includes an infrared receiving circuit and a counting circuit. The infrared receiving circuit is connected to the input terminal of the counting circuit, and the output terminal of the counting circuit is connected to the controller.

6. The plate counter according to claim 5, characterized in that, The infrared receiving circuit includes an infrared receiving tube and a first resistor; The counting circuit includes a second resistor, a third resistor, a filter capacitor, a Schmitt trigger, a transistor, and a counter; One end of the infrared receiver is connected to one end of the first resistor, and the other end is connected to the power supply. The other end of the first resistor is connected to the ground terminal. The base of the transistor is connected to one end of the infrared receiver through a second resistor. The collector of the transistor is connected to one end of the third resistor. The other end of the third resistor is connected to the power supply. The emitter of the transistor is connected to the ground terminal. The filter capacitor is connected in parallel with the first resistor. The input terminal of the Schmitt trigger is connected to the collector of the transistor. The output terminal of the Schmitt trigger is connected to the input terminal of the counter. The output terminal of the counter is connected to the controller.

7. The plate counter according to claim 1, characterized in that, It also includes a button module, which is connected to the controller.

8. The plate counter according to claim 1, characterized in that, It also includes an electronic display and a wireless communication module, wherein the electronic display is wirelessly connected to the wireless communication module, and the wireless communication module is connected to the controller.

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