A paper counting system with display function

Abstract

The invention discloses a paper counting system with a display function, comprising a paper counting device, a capacitance value measuring module, a main control board module, a key circuit, a power supply module, a short circuit detection circuit and a display module; paper is put into the paper counting device, and an oscillation frequency is generated by the capacitance value measuring module, and the main control board module reads the frequency value sent by the capacitance value measuring module in real time through a serial port, calculates the measured capacitance value, thereby realizing paper counting, and displaying the number of papers through a display screen; the power supply module includes two power supply modes, one is to use a power supply circuit for power supply, and the other is to use a USB for power supply; the main material of the paper counting device is a PVC board and some common materials in daily production, and the device structure is simple; the system has the advantages of high precision, fast response and low cost; the invention makes up for the shortcomings of high noise, easy to cause paper wear, expensive sensor equipment, and high requirements for image acquisition equipment in the past.

Description

Technical Field

[0001] The invention relates to the technical field of paper page counting in the printing and copying industry and daily life, and in particular to a paper counting system with a display function. Background Art

[0002] In actual production and life, people often need to quickly count the number of paper pages. Therefore, it is of great significance to design a system for quickly counting the number of paper pages.

[0003] At present, there are two main types of paper counting systems in China. One is a counting system that uses a mechanical counting method. This type of system not only has requirements for the size of the paper, but also has problems such as high noise, limited speed, easy paper wear, and low calculation accuracy. The other is a counting system that uses ultrasonic, ray or image grayscale acquisition methods. This type of system has the problems of expensive sensor equipment, high requirements for image acquisition equipment, and high cost. Therefore, designing a simple paper counting display system has certain practical application value. Summary of the invention

[0004] The purpose of the present invention is to provide a system that can accurately and quickly calculate the number of papers and display the results, which can not only make up for the shortcomings of traditional mechanical counting systems such as high noise, limited speed, easy paper wear and low calculation accuracy, but also avoid the high cost caused by expensive sensor equipment used in counting systems of ultrasonic, radiation, and image grayscale acquisition counting methods and image acquisition equipment with too high equipment requirements.

[0005] The present invention is implemented as follows: a paper counting system with a display function, comprising a paper counting device, a capacitance value measuring module, a main control board module, a key circuit, a power supply module, a short circuit detection circuit and a display module; the paper counting device comprises: an upper clamping plate, a lower clamping plate, a first sliding shaft, a second sliding shaft, a third sliding shaft, a fourth sliding shaft, a plate A, a plate B, a weight, a base, a wire A, a wire B, an upper wire groove, and a lower wire groove; the capacitance value measuring module comprises an FDC2214 capacitance sensor and an LC resonant circuit; the main control board module uses an STM32F103 as an MCU; the power supply module comprises a power supply circuit and a USB power supply module; the short circuit detection circuit comprises a short circuit prompt small light circuit and a buzzer circuit; the display module comprises a 4-pin OLED display screen; the paper counting device is connected to the capacitance value measuring module. The main control board module is respectively connected to the capacitance value measuring module, the key circuit and the display module. The power supply module is respectively connected to the main control module, the capacitance value measuring module, the key circuit module and the display module. The short circuit detection circuit is connected to the main control board module.

[0006] The paper counting device comprises: an upper clamping plate, a lower clamping plate, a first sliding shaft, a second sliding shaft, a third sliding shaft, a fourth sliding shaft, a plate A, a plate B, a weight, a base, a wire A, a wire B, an upper wire groove, and a lower wire groove; the upper clamping plate has the same structure as the lower clamping plate, both are rectangular, and are kept parallel, the four corners of the upper and lower clamping plates are provided with holes for passing the sliding shafts, and four sliding shafts are provided between the upper clamping plates, namely the first sliding shaft, the second sliding shaft, the third sliding shaft, and the fourth sliding shaft. The main function of setting the sliding shaft is to ensure that the range of movement of the upper clamping plate and the lower clamping plate is fixed, and at the same time, the position of the plate A and the plate B are aligned. The four sliding shafts pass through the upper clamping plate and the lower clamping plate respectively, and nuts are provided on the sliding shafts for fixing the four sliding shafts to ensure that the positions of the four sliding shafts and the upper clamping plate and the lower clamping plate will not be offset; the plate A and the plate B are two copper plates of the same material and exactly the same size, the plate A is close to the inner side of the upper clamping plate, and the plate B is close to the inner side of the lower clamping plate and is located directly below the plate A; a heavy object is provided on the outer side of the upper clamping plate, and its function is to ensure that the paper to be tested is tightly clamped between the upper and lower clamping plates to ensure accurate measurement of the capacitance value; a base is provided on the outer side of the lower clamping plate, and its function is to ensure that the bottom of the device is flat; the wire A is welded to the side of the plate A, and the wire is placed along the upper wire groove reserved in advance on the upper clamping plate, and the other side of the wire A is connected to the capacitance value measurement module; the wire B is welded to the side of the plate B, and the wire is also placed along the lower wire groove reserved in advance on the lower clamping plate, which is consistent with the structure of the wire A, and the other side of the wire B is connected to the capacitance value measurement module.

[0007] A weight is arranged on the outer side of the upper splint, i.e., the side facing the sky, and the inner side is the other side; a base is arranged on the outer side of the lower splint, i.e., the side touching the ground, and the inner side is the side opposite to the inner side of the upper splint.

[0008] The upper wire groove and the lower wire groove are grooves for placing wires, which are respectively provided on the upper clamping plate and the lower clamping plate. The function of the grooves is to ensure that the surfaces of the electrode plates A and B are flat, thereby ensuring that the distances between the electrode plates A and B and the upper clamping plate and the lower clamping plate are equal, so that when measuring the number of sheets of paper, there are no protrusions between the electrode plates A and B close to the paper and the upper clamping plate and the lower clamping plate, and the flatness is maintained to ensure the measurement accuracy.

[0009] The capacitance value measurement module includes an FDC2214 capacitance sensor and an LC resonant circuit. The inductor L1 and the capacitor C1 are connected to the input end of each detection channel of the FDC2214 capacitance sensor to form an LC resonant circuit. The capacitance sensing end to be measured is connected to the LC resonant circuit to generate an oscillation frequency. The main control board module reads the frequency value sent by the capacitance value measurement module in real time through the serial port and calculates the capacitance value to be measured. The main function of this module is to deduce the relationship between the capacitance value and the number of measured papers through the calculated capacitance value, thereby realizing paper counting. The capacitance value measurement module provides two channels, and a spare channel is reserved for the user.

[0010] The main control board module uses STM32F103 as MCU. The main function of this module is to collect information and organize and calculate the data, so as to deduce the relationship between the capacitance value and the number of measured papers, obtain the number of papers, and drive the display module to display the final number of papers.

[0011] The key circuit includes a start key, a key1 start measurement key, a key2 enter calibration key, and key3 and key4 reserve keys, and the keys are connected to the main control board module. The main function of this module is to receive instructions from the user to start the system, start measurement and paper calibration.

[0012] The power module includes a power circuit and a USB power supply module. The power circuit uses a transformer and a bridge rectifier circuit to convert 220V voltage into 3.3V to supply the MCU, and the USB power supply module uses a USB interface to directly supply power. The main function of the power module is to provide power for the entire circuit and the main control board module.

[0013] The short-circuit detection circuit includes a short-circuit warning small light circuit and a buzzer circuit; the small light warning circuit includes a short-circuit warning small light LED3, a spare small light LED2, a resistor R5, and a resistor R6. Resistors R5 and R6 have a resistance value of 510 ohms. The resistors are used to protect the small lights to prevent the small lights from being damaged by too much current; the buzzer circuit includes an active buzzer, an NPN transistor, and a resistor R4. When detecting a short circuit, the two plates are pressed tightly together, and the system determines whether the circuit is short-circuited. If so, the display module displays "short circuit", the short-circuit warning small light LED3 lights up, and the buzzer sounds. The function of the short-circuit detection circuit is to remind the user of wrong operation to avoid system damage.

[0014] The display module includes a 4-pin OLED display screen, which is connected to the main control board module. The main function of the module is to display the number of tested papers and whether there is a short circuit.

[0015] Compared with the prior art, the paper counting system with display function provided by the present invention has the following beneficial effects:

[0016] (1) The upper and lower clamps and the base of the paper counting device are made of PVC material, which is low in price and widely used.

[0017] (2) The paper counting device has a simple overall structure and is easy to maintain.

[0018] (3) The paper counting device uses a sliding shaft and a nut to ensure that the upper and lower clamping plates remain parallel, which not only ensures that the positions of the two plates are always aligned vertically, but also ensures the measurement accuracy.

[0019] (3) The circuit adopts a redundant design. If a part of the components is damaged or a circuit fails during actual use, it can be switched to the redundant components in time to ensure the normal use of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall system block diagram of a paper counting system with display function of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a paper counting device of the present invention;

[0022] Figure 3 The present invention is a program flow chart of a paper counting system with display function.

[0023] Markings in the figure:

[0024] Figure 1 :1-paper counting device, 2-capacitance measuring device, 2-1FDC2214 capacitance sensor, 2-2LC resonant circuit, 3-main control board module, 4-key circuit, 5-power module, 5-1 power circuit, 5-2USB power supply module, 6-short circuit detection circuit, 6-1 short circuit prompt light circuit, 6-2 buzzer circuit, 7-display module.

[0025] Figure 2 :1-1 upper splint, 1-2 lower splint, 1-3 first sliding shaft, 1-4 second sliding shaft, 1-5 third sliding shaft, 1-6 fourth sliding shaft, 1-7 pole plate A, 1-8 pole plate B, 1-9 weight, 1-10 base, 1-11 wire A, 1-12 wire B, 1-13 upper wire groove, 1-14 lower wire groove. DETAILED DESCRIPTION

[0026] Example:

[0027] The specific implementation modes of the present invention are described below so as to be understood by those skilled in the art.

[0028] like Figure 1As shown, a paper counting system with a display function includes a paper counting device 1, a capacitance value measuring module 2, a main control board module 3, a key circuit 4, a power module 5, a short circuit detection circuit and a display module 6; the paper counting device includes: an upper clamping plate 1-1, a lower clamping plate 1-2, a first sliding shaft 1-3, a second sliding shaft 1-4, a third sliding shaft 1-5, a fourth sliding shaft 1-6, a plate A1-7, a plate B1-8, a weight 1-9, a base 1-10, a wire A1-11, a wire B1-1 2, upper wire groove 1-13, lower wire groove 1-14; capacitance measurement module 2 includes FDC2214 capacitance sensor 2-1 and LC resonant circuit 2-2; main control board module 3 uses STM32F103 as MCU; power module 5 includes power circuit 5-1 and USB power supply module 5-2; short circuit detection circuit 6 includes short circuit prompt small light circuit 6-1 and buzzer circuit 6-2; display module 7 includes 4-pin OLED display screen; paper counting device 1 is connected to capacitance measurement module 2. Main control board module 3 is respectively connected to capacitance measurement module 2, key circuit 4 and display module 7. The power module 5 is respectively connected to main control module 3, capacitance measurement module 2, key circuit module 4 and display module 7. The short circuit detection circuit 6 is connected to main control board module 3.

[0029] like Figure 2As shown, the paper counting device includes: an upper clamping plate 1-1, a lower clamping plate 1-2, a first sliding shaft 1-3, a second sliding shaft 1-4, a third sliding shaft 1-5, a fourth sliding shaft 1-6, a plate A1-7, a plate B1-8, a weight 1-9, a base 1-10, a wire A1-11, a wire B1-12, an upper wire groove 1-13, and a lower wire groove 1-14; the upper clamping plate 1-1 has the same structure as the lower clamping plate 1-2, both are rectangular, and are kept parallel, the upper and lower clamping plates are provided with holes at the four corners for passing the sliding shaft, and four sliding shafts are provided between the upper and lower clamping plates, namely the first sliding shaft 1-3, the second sliding shaft 1-4, the third sliding shaft 1-5, and the fourth sliding shaft 1-6. The function of setting the sliding shaft is to ensure that the range of movement of the upper clamping plate 1-1 and the lower clamping plate 1-2 is fixed, and at the same time, the position of the plate A 1-7 and the plate B1-8 are aligned. The four sliding shafts pass through the upper clamping plate and the lower clamping plate respectively, and nuts are provided on the sliding shafts to fix the four sliding shafts and ensure that the positions of the four sliding shafts and the upper clamping plate 1-1 and the lower clamping plate 1-2 will not be offset; the pole plate A1-7 and the pole plate B1-8 are two copper plates with the same material and exactly the same size. The pole plate A1-7 is close to the inner side of the upper clamping plate, and the pole plate B1-8 is close to the inner side of the lower clamping plate and is located directly below the pole plate A1-7; a weight 1-9 is provided on the outer side of the upper clamping plate 1-1, and its function is to ensure that the paper to be tested is tightly clamped between the upper and lower plates to ensure Ensure that the measured capacitance value is accurate; a base 1-10 is provided on the outer side of the lower clamping plate 1-2 to ensure that the bottom of the device is flat; the wire A1-11 is welded to the side of the electrode plate A1-7, and the wire is placed along the upper wire 1-13 groove reserved in advance on the upper clamping plate 1-1, and the other side of the wire A1-11 is connected to the capacitance measurement module; the wire B1-12 is welded to the side of the electrode plate B1-8, and the wire is also placed along the lower wire groove 1-14 reserved in advance on the lower clamping plate, which is consistent with the structure of the wire A1-11, and the other side of the wire B1-12 is connected to the capacitance measurement module 2.

[0030] A weight 1-9 is arranged on the outer side of the upper splint 1-1, i.e., the side facing the sky, and the inner side is the other side; a base 1-10 is arranged on the outer side of the lower splint 1-2, i.e., the side touching the ground, and the inner side is the side opposite to the inner side of the upper splint 1-1.

[0031] The upper wire groove 1-13 and the lower wire groove 1-14 are grooves for placing wires on the upper clamping plate 1-1 and the lower clamping plate 1-2 respectively. The function is to ensure that the surface of the electrode plate A1-7 and the electrode plate B1-8 is flat, so as to ensure that the distance between the electrode plate A1-7 and the electrode plate B1-8 and the upper clamping plate 1-1 and the lower clamping plate 1-2 is equal, and to ensure that when measuring the number of paper sheets, there are no protrusions between the electrode plate A1-7 and the electrode plate B1-8 close to the paper and the upper clamping plate 1-1 and the lower clamping plate 1-2, and they remain flat to ensure measurement accuracy.

[0032] The capacitance value measuring module 2 includes an FDC2214 capacitance sensor 2-1 and an LC resonant circuit 2-2. The inductor L1 and the capacitor C1 are connected to the input end of each detection channel of the FDC2214 capacitance sensor 2-1 to form an LC resonant circuit 2-2. The capacitance sensing end 2-1 to be measured is connected to the LC resonant circuit 2-2 to generate an oscillation frequency. The main control board module 3 reads the frequency value sent by the capacitance value measuring module 2 in real time through the serial port and calculates the capacitance value to be measured. The main function of this module is to deduce the relationship between the capacitance value and the number of measured papers through the calculated capacitance value, thereby realizing paper counting. The capacitance value measuring module provides two channels, and a spare channel is reserved for the user.

[0033] The main control board module 3 uses STM32F103 as MCU. The main function of this module is to collect information and organize and calculate the data, so as to deduce the relationship between the capacitance value and the number of measured papers, obtain the number of papers, and drive the display module to display the final number of papers.

[0034] The key circuit 4 includes a start key, key1 to start measuring key, key2 to enter calibration key, key3 and key4 to reserve keys, and the keys are connected to the main control board module. The main function of this module is to receive the user's instructions to start the system, start measuring and paper calibration.

[0035] The power supply module 5 includes a power supply circuit 5-1 and a USB power supply module 5-2. The power supply circuit 5-1 uses a transformer and a bridge rectifier circuit to convert 220V voltage into 3.3V to supply the MCU, and the USB power supply module 5-2 uses a USB interface to directly supply power.

[0036] The short circuit detection circuit 6 includes a short circuit warning small light circuit 6-1 and a buzzer circuit 6-2; the small light warning circuit 6-1 includes a short circuit warning small light LED3, a spare small light LED2, a resistor R5, and a resistor R6. Resistors R5 and R6 have a resistance value of 510 ohms. The resistors are used to protect the small lights to prevent the current from being too large and causing damage to the small lights; the buzzer circuit 6-2 includes an active buzzer, an NPN transistor, and a resistor R4. During short circuit detection, the two plates are pressed tightly together, and the system determines whether the circuit is short-circuited. If so, the display module 7 displays "short circuit", the short circuit warning small light LED3 lights up, and the buzzer sounds. The function of the short circuit detection circuit 6 is to remind the user of wrong operation and avoid system damage.

[0037] The display module 7 includes a 4-pin OLED display screen, which is connected to the main control board module. The function of this module is to display the number of papers tested and whether there is a short circuit.

[0038] A paper counting system with display function in this embodiment works according to the following process:

[0039] like Figure 3 As shown, the circuit is powered on, the start button is pressed, the system enters the initialization test, and then the system starts short-circuit detection to determine whether the plate is short-circuited. If so, the display module 7 displays "short circuit", the short-circuit prompt light LED3 lights up, and the buzzer sounds. If not, the system scans the button, presses the calibration button, and prompts to put in paper for calibration. After calibration, press the measurement button to start the measurement and display the result. Finally, the system ends the operation.

[0040] When counting paper sheets, the user starts the system to check whether there is a short circuit. If the circuit is normal, press the calibration button to enter the calibration, then lift the upper clamping plate with a heavy object, put the paper into the device from the side and place it between the electrode plate A1-7 and the electrode plate B1-8, put down the upper clamping plate 1-1, make the device press the paper, and press the start measurement button to get the specific number of paper sheets.

[0041] The present invention is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the limitations of the attached claims and the spirit and scope of the present invention, all inventions and creations using the concepts of the present invention are within the scope of protection.

Claims

1. A paper counting system with display function, characterized in that include: Paper counting device, capacitance value measuring module, main control board module, key circuit, power supply module, short circuit detection circuit and display module; the capacitance value measuring module includes FDC2214 capacitance sensor and LC resonance circuit, and the capacitance value measuring module provides two channels; The main control board module uses STM32F103 as MCU; The power module includes a power circuit and a USB power supply module; the short circuit detection circuit includes a short circuit prompt light circuit and a buzzer circuit; the display module includes a 4-pin OLED display screen; the paper counting device is connected to the capacitance value measurement module, and the main control board module is respectively connected to the capacitance value measurement module, the key circuit and the display module; the power module is respectively connected to the main control module, the capacitance value measurement module, the key circuit module and the display module; the short circuit detection circuit is connected to the main control board module; The paper counting device comprises: an upper clamping plate, a lower clamping plate, a first sliding shaft, a second sliding shaft, a third sliding shaft, a fourth sliding shaft, a pole plate A, a pole plate B, a weight, a base, a wire A, a wire B, an upper wire groove and a lower wire groove; the upper clamping plate has the same structure as the lower clamping plate, both are rectangular, and are kept parallel, the four corners of the upper and lower clamping plates are provided with holes for passing the sliding shafts, and four sliding shafts are provided between the upper clamping plates, namely the first sliding shaft, the second sliding shaft, the third sliding shaft, and the fourth sliding shaft; the four sliding shafts pass through the upper clamping plate and the lower clamping plate respectively, and nuts are provided on the sliding shafts to fix the four sliding shafts to ensure that the positions of the four sliding shafts and the upper clamping plate and the lower clamping plate will not deviate; The electrode plate A and the electrode plate B are two copper plates of the same material and the same size. The electrode plate A is close to the inner side of the upper clamping plate, and the electrode plate B is close to the inner side of the lower clamping plate and is located directly below the electrode plate A; a weight is provided on the outer side of the upper clamping plate; a base is provided on the outer side of the lower clamping plate; the wire A is welded to the side of the electrode plate A, and the wire is placed along the wire groove reserved in advance on the upper clamping plate, and the other side of the wire A is connected to the capacitance measurement module; the wire B is welded to the side of the electrode plate B, and the wire is also placed along the wire groove reserved in advance on the lower clamping plate, which is consistent with the structure of the wire A, and the other side of the wire B is connected to the capacitance measurement module; A heavy object is arranged on the outer side of the upper clamping plate, i.e., the side facing the sky, and the inner side is the other side; a base is arranged on the outer side of the lower clamping plate, i.e., the side touching the ground, and the inner side is the side opposite to the inner side of the upper clamping plate; the upper wire groove and the lower wire groove are grooves for placing the wires, respectively provided on the upper clamping plate and the lower clamping plate.

2. A paper counting system with display function according to claim 1, characterized in that: The capacitance value measuring module includes: an FDC2214 capacitance sensor and an LC resonant circuit. An inductor L1 and a capacitor C1 are connected to the input end of each detection channel of the FDC2214 capacitance sensor to form an LC resonant circuit. The capacitance sensing end to be measured is connected to the LC resonant circuit.

3. A paper counting system with display function according to claim 1, characterized in that: The key circuit includes: a start key, a key1 to start measuring key, a key2 to enter calibration key, and key3 and key4 to reserve keys. The key circuit is connected to the main control board module.

4. A paper counting system with display function according to claim 1, characterized in that: The power supply module includes: a power supply circuit and a USB power supply module. The power supply circuit uses a transformer and a bridge rectifier circuit to convert 220v voltage into 3.3v to supply the MCU, and the USB power supply module uses a USB interface to directly supply power.

5. A paper counting system with display function according to claim 1, characterized in that: The short circuit detection circuit includes: a short circuit warning small light circuit and a buzzer circuit; the small light warning circuit includes a short circuit warning small light LED3, a spare small light LED2, a resistor R5, and a resistor R6; the resistors R5 and R6 have a resistance value of 510 ohms; the buzzer circuit includes an active buzzer, an NPN transistor and a resistor R4.

6. A paper counting system with display function according to claim 1, characterized in that: The display module is a 4-pin OLED display screen and is connected to the main control board module.

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