Control circuit of paper counting display device

Abstract

The utility model provides a control circuit of a paper counting display device, the display device comprises a control module, a signal conversion module and a paper container, and an operation module is arranged in the control module; the paper container comprises two capacitor plates which are arranged in parallel in pairs, and a space between the two capacitor plates is a storage space for paper to be counted; the signal conversion module is connected with two capacitance plates of a paper container so as to form a paper measurement signal according to the capacitance value change of the paper container after paper to be counted is placed in the paper container, and the operation module is connected with the signal conversion module and judges the number of paper in the paper container corresponding to the signal according to the paper measurement signal; the A4 paper counting device can automatically count the A4 paper in the measuring container and display the number of the paper.

Description

Technical Field

[0001] The utility model relates to the technical field of paper detection circuits, in particular to a control circuit of a paper counting and display device. Background Art

[0002] Paper counting devices have a wide range of application scenarios in the industrial field and are of great help in improving production efficiency. With the rapid development of modern industry, the requirements for paper counting in the papermaking and printing industries are getting higher and higher. Traditional paper counting methods can hardly meet the needs of current production development. Therefore, a simple and high-precision paper counting device is urgently needed to replace the defects of traditional paper counting devices. The purpose of this device is to design a simple paper counting and display function device.

[0003] Therefore, in view of the above situation, it is necessary to design a control circuit of an intelligent paper counting and display device that can automatically count A4 paper and display the number of papers. Utility Model Content

[0004] The utility model provides a control circuit of a paper counting and displaying device, which can automatically count A4 papers in a measuring container and display the number of papers.

[0005] The utility model adopts the following technical solutions.

[0006] A paper counting display device comprises a control module, a signal conversion module and a paper container, wherein the control module has a built-in operation module; the paper container comprises two capacitor plates arranged in pairs and in parallel, and the space between the two capacitor plates is a storage space for paper to be counted; the signal conversion module is connected to the two capacitor plates of the paper container, and a paper measurement signal is formed by the change in the capacitance value of the paper container after the paper to be counted is placed therein; the operation module is connected to the signal conversion module, and the number of paper in the paper container corresponding to the signal is determined according to the paper measurement signal.

[0007] The two capacitor plates are placed horizontally, and the paper to be counted is A4-sized printing paper.

[0008] The paper container also includes a plate-shaped paperweight with a fixed weight; the paperweight is formed of insulating material; when the paper to be counted is horizontally placed in the paper container, the paperweight presses on the paper to be counted so that the paper to be counted reaches the compression required for measurement.

[0009] The operation module includes a storage element storing data on the corresponding relationship between the paper measurement signal and the number of papers between the capacitor plates. It retrieves the corresponding number of papers to be counted according to the input paper measurement signal and outputs it to the control module for paper counting display.

[0010] A control circuit for a paper counting display device, used for the paper counting display device described above, the control circuit comprises a control module, a signal conversion module, and a calculation module in the paper counting display device, and also comprises a display module, a keyboard input module, an alarm module, and a voltage stabilizing module; the control module is electrically connected to the signal conversion module, the display module, the keyboard input module, the alarm module, and the voltage stabilizing module respectively;

[0011] The control module includes an operation module U1 and peripheral circuits related to the operation module, wherein the peripheral circuits include a crystal oscillator circuit, a reset circuit, a filter circuit and a startup circuit; the hardware components of the operation module U1 include an STM32 embedded microcontroller;

[0012] The signal conversion module is connected to the operation module U1 through the interface PA0, and is connected to the external capacitor plate through the pin interface INT; the signal conversion module converts the capacitance value between the two capacitor plates into an output frequency, and encodes the output frequency into a paper measurement signal; after receiving the paper measurement signal, the operation module decodes the paper measurement data in the signal by obtaining the output frequency of the paper measurement signal;

[0013] The display module P1 is used to display the paper counting result, and is connected to the operation module U1 through interfaces PB10 and PB11;

[0014] The alarm module is connected to the computing module U1 via the PA2 port; the alarm module is used for fault alarm during the paper counting process; the fault alarm information of the alarm module includes information displayed by the display module;

[0015] The keyboard input module is connected to the computing module U1 via the pin header interface P3, and is used to control the current working mode of the paper counting and display device, including the measurement and calibration information mode, the paper test mode, and the paper placement and determination and display of the counting result mode;

[0016] The input end of the voltage stabilizing module is connected to a +12V power supply, and the output end is electrically connected to the power supply end of the control module. The voltage stabilizing module is used to convert the input power supply voltage 12V into voltages of 5V and 3.3V, and is connected to the signal conversion module and the alarm module through the voltage 5V output end to power them, and is connected to the operation module U1 and the display module through the voltage 3.3V output end to power them.

[0017] In the peripheral circuit, the crystal oscillator circuit is composed of capacitor C9, capacitor C10 and crystal oscillator Y1, the reset circuit is composed of reset switch S1, capacitor C8 and resistor R13, the filter circuit is composed of capacitor C16 and capacitor C17, and the start-up circuit is composed of resistor R3;

[0018] The pins 32, 48, 64, 19, and 13 of the computing module U1 are connected toFigure 6 The voltage 3.3V terminal of the voltage regulator module is connected, and the pins 31, 47, 63, 18, and 12 of the computing module U1 are connected to Figure 6 GND terminal connection of voltage regulator module;

[0019] In the crystal oscillator circuit, the capacitor C9 pin 1 is connected to the pin 5 of the computing module U1, and the capacitor C9 pin 2 is connected to the pin 6 of the computing module U1. Figure 6 The GND of the voltage stabilizing module is connected; the pin 1 of capacitor C10 is connected to the pin 5 of the computing module U1, and the pin 2 of capacitor C10 is connected to the Figure 6 GND of the voltage stabilizing module; the crystal oscillator Y1 pin 1 is connected to the pin 6 of the computing module U1, and the crystal oscillator Y1 pin 2 is connected to the pin 5 of the computing module U1;

[0020] In the reset circuit, the reset switch S1 pin 1 is connected to Figure 6 The GND of the voltage regulator module is connected, the reset switch S1 pin 2 is connected to the pin 7 of the operation module U1; the capacitor C8 pin 1 is connected to Figure 6 The GND of the voltage stabilizing module is connected, the pin 2 of the capacitor C8 is connected to the pin 7 of the computing module U1; the pin 1 of the resistor R13 is connected to Figure 6 The voltage of the voltage stabilizing module is connected to 3.3V, and the pin 2 of the resistor R13 is connected to the pin 7 of the computing module U1;

[0021] In the filter circuit, capacitor C16 pin 1 and Figure 6 The voltage of the voltage regulator module is 3.3V, and the capacitor C16 pin 2 is connected to Figure 6 The GND connection of the voltage regulator module; the capacitor C17 pin 1 and Figure 6 The voltage of the voltage regulator module is 3.3V, and the capacitor C17 pin 2 is connected to Figure 6 GND connection of voltage regulator module;

[0022] In the startup circuit, the resistor R3 pin 1 is connected to Figure 6 The GND of the voltage stabilizing module is connected, and the pin 2 of the resistor R3 is connected to the pin 60 of the computing module U1;

[0023] The operation module U1 is STM32F103RCT6; the model of the crystal oscillator Y1 is 12MHZ, the specifications of the capacitors C9 and C10 are 22PF, the specification of the capacitor C8 is 10uF, the resistance value of the resistor R13 is 10kΩ, the specifications of the capacitors C16 and C17 are 104, and the resistance value of the resistor R3 is 10kΩ.

[0024] The signal conversion module includes a diode D1, a chip NE555, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a pin header interface INT;

[0025] The diode D1 pin 1 is connected to the PA0 of the computing module U1 and to the pin 3 of the chip NE555. The diode D1 pin 2 is connected to the Figure 6 5V connection of voltage regulator module; NE555 chip pin 1 and Figure 6 The GND of the voltage regulator module is connected, the NE555 pin 2 of the chip is connected to the INT pin 1 of the pin header interface, the NE555 pin 3 of the chip is connected to the diode D1 pin 1, and the NE555 pin 4 of the chip is connected to the Figure 6 The 5V connection of the voltage regulator module, the NE555 chip pin 5 is connected to the capacitor C3 pin 1, the NE555 chip pin 6 is connected to the pin header interface INT pin 1, the NE555 chip pin 7 is connected to the resistor R1 pin 1, the resistor R2 pin 2, the NE555 chip pin 8 is connected to Figure 6 The 5V connection of the voltage regulator module; the capacitor C1 pin 1 is connected to the chip NE555 pin 8, and the capacitor C1 pin 2 is connected to Figure 6 The GND of the voltage regulator module is connected; the pin 1 of capacitor C2 is connected to the pin 8 of the chip NE555, and the pin 2 of capacitor C2 is connected to Figure 6 The GND of the voltage regulator module is connected; the capacitor C3 pin 1 is connected to the chip NE555 pin 5, and the capacitor C3 pin 2 is connected to Figure 6 The GND of the voltage regulator module is connected; the resistor R1 pin 1 is connected to the chip NE555 pin 7, and the resistor R1 pin 2 is connected to the chip NE555 pin 8; the resistor R2 pin 1 is connected to the chip NE555 pin 6, and the resistor R2 pin 2 is connected to the chip NE555 pin 7; the pin header interface INT pin 1 is connected to the chip NE555 pin 6, and the pin header interface INT pin 2 is connected to the chip NE555 pin 5;

[0026] Among them, the chip NE555 uses a voltage of 5V, the specifications of capacitor C1 are 106, the specifications of capacitor C2 are 104, the specifications of capacitor C3 are 104, the resistance values ​​of resistors R1 and R2 are 51 kΩ, the model of the pin header interface INT is 2*2.54mm, and the specification of diode D1 is 1N4148.

[0027] The pin 1 of the display module P1 is connected to the pin 12 of the computing module U1, and the pin 2 is connected to the Figure 6 The 3.3V connection of the voltage regulator module, the pin 3 is connected to the pin 29 of the computing module U1, and the pin 4 is connected to the pin 30 of the computing module U1;

[0028] Among them, the voltage of display module P1 is 3.3V, and the model is OLED12864;

[0029] The alarm module includes a resistor R4, a diode D2, a transistor Q1 and a buzzer LS1; wherein the resistor R4 pin 1 is connected to the transistor Q1 pin 2, the resistor R4 pin 2 is connected to the operation module U1 pin 16; the diode D2 pin 1 is connected to the transistor Q1 pin 3, the diode D2 pin 2 is connected to the operation module U1 pin 16; Figure 6 The 5V connection of the voltage regulator module; the transistor Q1 pin 1 is connected to the pin 12 of the operation module U1, the transistor Q1 pin 2 is connected to the resistor R4 pin 1, the transistor Q1 pin 3 is connected to the diode D2 pin 1, the transistor Q1 pin 3 is connected to the buzzer LS pin 2; the buzzer LS1 pin 1 is connected to Figure 6 The 5V connection of the voltage regulator module, the buzzer LS1 pin 2 and the transistor Q1 pin 3 are connected;

[0030] Among them, the resistance value of the resistor R4 is 1 kΩ, the model of the diode D2 is SS24, the model of the transistor Q1 is S8050, and the model of the buzzer LS1 is BUZZ.

[0031] The keyboard input module includes a pin header interface P3, a reset switch SW0, a reset switch SW1, a reset switch SW2, a reset switch SW3, a reset switch SW4, a reset switch SW5, a reset switch SW6, a reset switch SW7, a reset switch SW8, a reset switch SW9, a reset switch SW10, a reset switch SW11, a reset switch SW12, a reset switch SW13, a reset switch SW14 and a reset switch SW15;

[0032] Wherein, pin 1 of the pin header interface P3 is connected to pin 41 of the operation module U1, pin 2 of the pin header interface P3 is connected to pin 42 of the operation module U1, pin 3 of the pin header interface P3 is connected to pin 43 of the operation module U1, pin 4 of the pin header interface P3 is connected to pin 44 of the operation module U1, pin 5 of the pin header interface P3 is connected to pin 45 of the operation module U1, pin 6 of the pin header interface P3 is connected to pin 46 of the operation module U1, pin 7 of the pin header interface P3 is connected to pin 49 of the operation module U1, and pin 8 of the pin header interface P3 is connected to pin 50 of the operation module U1; pin 2 of the reset switch SW0 is connected to pin 1 of the pin header interface P3, and pin 1 of the reset switch SW0 is connected to pin 51 of the pin header interface P3. Pin 5 is connected; pin 2 of reset switch SW1 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW1 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW2 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW2 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW3 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW3 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW4 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW4 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW5 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW5 is connected to pin 6 of pin header interface P3; reset Pin 2 of position switch SW6 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW6 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW7 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW7 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW8 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW8 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW9 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW9 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW10 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW10 is connected to pin 7 of pin header interface P3; reset switch Pin 2 of SW11 is connected to pin 3 of the pin header interface P3, and pin 1 of reset switch SW11 is connected to pin 8 of the pin header interface P3; pin 2 of reset switch SW12 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW12 is connected to pin 5 of the pin header interface P3; pin 2 of reset switch SW13 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW13 is connected to pin 6 of the pin header interface P3; pin 2 of reset switch SW14 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW14 is connected to pin 7 of the pin header interface P3; pin 2 of reset switch SW15 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW15 is connected to pin 8 of the pin header interface P3;

[0033] Among them, the model of the pin header interface P3 is 8*2.54mm, and the model of the 16 reset switches is 6*6*5mm.

[0034] The voltage stabilizing module includes a power socket J1, a switch S1, a capacitor C15, a capacitor C13, a capacitor C14, a resistor R10, a reference voltage chip U4, a capacitor C11, a capacitor C12, a capacitor C18, a capacitor C4, a capacitor C5, a voltage stabilizer U3, a capacitor C6, a capacitor C7, a resistor R16 and a light emitting diode D3;

[0035] The power socket J1 is connected to the DC power supply 12V, the pin 1 of the power socket J1 is connected to the pin 3 of the switch S1, the pin 2 of the power socket J1 is connected to the pin 12 of the computing module U1, and the pin 3 of the power socket J1 is connected to the pin 12 of the computing module U1; the DC voltage 12V output by the switch S1 pin 1 is connected to the pin 1 of the capacitor C15, and the pin 3 of the switch S1 is connected to the pin 1 of the power socket J1; when the switch S1 is closed, the pin 1 of the switch S1 is connected to the pin 3 of the switch S1, and the pin 4 of the switch S1 is connected to the pin 5 of the switch S1; when the switch S1 is opened, the pin 1 of the switch S1 is connected to the pin 2 of the capacitor C15; The switch S1 pin 2 is connected, the switch S1 pin 4 is connected to the switch S1 pin 5; the capacitor C15 pin 1 is connected to the switch S1 pin 1, the capacitor C15 pin 2 is connected to the operation module U1 pin 12; the capacitor C13 pin 2 is connected to the switch S1 pin 1, the capacitor C13 pin 1 is connected to the operation module U1 pin 12; the capacitor C14 pin 2 is connected to the switch S1 pin 1, the capacitor C14 pin 1 is connected to the operation module U1 pin 12; the resistor R10 pin 1 is connected to the reference voltage chip U4 pin 2, the resistor R10 pin 2 is connected to the capacitor C14 pin 2; the base The pin 2 of the quasi-voltage chip U4 is connected to the pin 1 of the switch S1, the pin 3 of the reference voltage chip U4 is connected to the pin 1 of the resistor R10, the pin 4 of the reference voltage chip U4 is connected to the pin 12 of the operation module U1, the pin 6 of the reference voltage chip U4 outputs 5V, and is connected to the pin 2 of the capacitor C11, the pin 2 of the capacitor C12, and the pin 1 of the capacitor C18; the pin 1 of the capacitor C11 is connected to the pin 12 of the operation module U1, the pin 2 of the capacitor C11 is connected to the pin 6 of the reference voltage chip U4; the pin 1 of the capacitor C12 is connected to the pin 12 of the operation module U1, and the pin 2 of the capacitor C12 is connected to the reference voltage chip U4 The pin 6 of the voltage chip U4 is connected; the pin 1 of the capacitor C12 is connected to the pin 6 of the reference voltage chip U4, and the pin 2 of the capacitor C18 is connected to the pin 12 of the operation module U1; the pin 1 of the capacitor C4 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C4 is connected to the pin 3 of the voltage regulator U3; the pin 1 of the capacitor C5 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C5 is connected to the pin 3 of the voltage regulator U3; the pin 3 of the voltage regulator U3 inputs 5V and outputs 3.3V through the pin 2, the pin 1 of the voltage regulator U3 is connected to the pin 12 of the operation module U1, and the pin 2 of the voltage regulator U3 outputs 3.3V, connected to capacitor C6 pin 2, capacitor C7 pin 2, resistor R16 pin 1, regulator U3 pin 3 as 5V voltage input, connected to capacitor C4 pin 2, capacitor C5 pin 2; capacitor C6 pin 1 is connected to the operation module U1 pin 12, capacitor C6 pin 2 is connected to regulator U3 pin 2; capacitor C7 pin 1 is connected to the operation module U1 pin 12, capacitor C7 pin 2 is connected to regulator U3 pin 2; resistor R16 pin 1 is connected to regulator U3 pin 2, resistor R16 pin 2 is connected to light emitting diode D3 pin A; light emitting diode D3 pin A is connected to resistor R16 pin 2, light emitting diode D3 pin K is connected to the operation module U1 pin 12;.

[0036] Among them, the specification of the power socket J1 is PWR2.5, the specification of the switch S1 is 7*7mm hexagonal push button switch, the specification of the capacitor C15 is 10uF, the specification of the capacitor C13 is 106, the specification of the capacitor C14 is 104, the resistance of the resistor R10 is 1kΩ, the specification of the reference voltage chip U4 is REF195, the specification of the capacitor C11 is 106, the specification of the capacitor C12 is 104, the specification of the capacitor C18 is 10uF, the specification of the capacitor C4 is 104, the specification of the capacitor C5 is 104, the specification of the regulator U3 is AMS1117-3.3, the specification of the capacitor C6 is 104, the specification of the capacitor C7 is 104, the resistance of the resistor R16 is 500Ω, and the specification of the light-emitting diode D3 is a 5mm LED lamp.

[0037] The control circuit of the intelligent paper counting and display device provided by the utility model is provided with a control module, a signal conversion module, a display module, a keyboard input module, an alarm module and a voltage stabilizing module, and the signal conversion module of the control module is electrically connected to the module, the display module, the keyboard input module, the alarm module and the voltage stabilizing module respectively, so as to realize the mutual cooperation between the modules, thereby realizing the automatic counting of A4 paper and making the whole counting process more automated.

[0038] The utility model counts the paper in a capacitance change manner, which is highly efficient, and is designed with a plate-shaped paperweight with a preset weight to maintain the compaction of A4 paper, eliminating interference of excess air between the papers on the capacitance value measurement, so that the measurement accuracy is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Attached Figure 1 The figure shows a circuit connection diagram of a control module of a control circuit of the intelligent paper counting and display device of the present invention;

[0041] Attached Figure 2It is a schematic diagram showing the circuit connection of the signal conversion module of the control circuit of the intelligent paper counting and display device of the present invention;

[0042] Attached Figure 3 The figure shows a connection diagram of a display module of a control circuit of an intelligent paper counting and display device of the present invention;

[0043] Attached Figure 4 The figure shows a circuit connection diagram of a keyboard input module of a control circuit of an intelligent paper counting and display device of the present utility model;

[0044] Attached Figure 5 The figure shows a circuit connection diagram of an alarm module of a control circuit of an intelligent paper counting and display device of the present utility model;

[0045] Attached Figure 6 The figure shows a circuit connection diagram of a voltage stabilizing module of a control circuit of an intelligent paper counting and display device of the utility model;

[0046] Attached Figure 7 It is a schematic diagram of the principle structure of the utility model. DETAILED DESCRIPTION

[0047] As shown in the figure, a paper counting display device includes a control module, a signal conversion module and a paper container, wherein the control module has a built-in operation module; the paper container includes two capacitor plates arranged in pairs in parallel, and the space between the two capacitor plates is a storage space for the paper to be counted; the signal conversion module is connected to the two capacitor plates of the paper container to form a paper measurement signal by changing the capacitance value of the paper container after the paper to be counted is placed therein; the operation module is connected to the signal conversion module to determine the number of paper in the paper container corresponding to the signal according to the paper measurement signal.

[0048] The two capacitor plates are placed horizontally, and the paper to be counted is A4-sized printing paper.

[0049] The paper container also includes a plate-shaped paperweight with a fixed weight; the paperweight is formed of insulating material; when the paper to be counted is horizontally placed in the paper container, the paperweight presses on the paper to be counted so that the paper to be counted reaches the compression required for measurement.

[0050] The operation module includes a storage element storing data on the corresponding relationship between the paper measurement signal and the number of paper between the capacitor plates, which retrieves the corresponding number of paper to be counted according to the input paper measurement signal and outputs it to the control module for paper counting display. This process can be run based on a pure hardware hardware circuit.

[0051] A control circuit for a paper counting display device, used for the paper counting display device described above, the control circuit comprises a control module, a signal conversion module, and a calculation module in the paper counting display device, and also comprises a display module, a keyboard input module, an alarm module, and a voltage stabilizing module; the control module is electrically connected to the signal conversion module, the display module, the keyboard input module, the alarm module, and the voltage stabilizing module respectively;

[0052] The control module includes an operation module U1 and peripheral circuits related to the operation module, wherein the peripheral circuits include a crystal oscillator circuit, a reset circuit, a filter circuit and a startup circuit; the hardware components of the operation module U1 include an STM32 embedded microcontroller;

[0053] The signal conversion module is connected to the operation module U1 through the interface PA0, and is connected to the external capacitor plate through the pin interface INT; the signal conversion module converts the capacitance value between the two capacitor plates into an output frequency, and encodes the output frequency into a paper measurement signal; after receiving the paper measurement signal, the operation module decodes the paper measurement data in the signal by obtaining the output frequency of the paper measurement signal;

[0054] The display module P1 is used to display the paper counting result, and is connected to the operation module U1 through interfaces PB10 and PB11;

[0055] The alarm module is connected to the computing module U1 via the PA2 port; the alarm module is used for fault alarm during the paper counting process; the fault alarm information of the alarm module includes information displayed by the display module;

[0056] The keyboard input module is connected to the computing module U1 via the pin header interface P3, and is used to control the current working mode of the paper counting and display device, including the measurement and calibration information mode, the paper test mode, and the paper placement and determination and display of the counting result mode;

[0057] The input end of the voltage stabilizing module is connected to a +12V power supply, and the output end is electrically connected to the power supply end of the control module. The voltage stabilizing module is used to convert the input power supply voltage 12V into voltages of 5V and 3.3V, and is connected to the signal conversion module and the alarm module through the voltage 5V output end to power them, and is connected to the operation module U1 and the display module through the voltage 3.3V output end to power them.

[0058] In the peripheral circuit, the crystal oscillator circuit is composed of capacitor C9, capacitor C10 and crystal oscillator Y1, the reset circuit is composed of reset switch S1, capacitor C8 and resistor R13, the filter circuit is composed of capacitor C16 and capacitor C17, and the start-up circuit is composed of resistor R3;

[0059] The pins 32, 48, 64, 19, and 13 of the computing module U1 are connected to Figure 6 The voltage 3.3V terminal of the voltage regulator module is connected, and the pins 31, 47, 63, 18, and 12 of the computing module U1 are connected to Figure 6 GND terminal connection of voltage regulator module;

[0060] In the crystal oscillator circuit, the pin 1 of capacitor C9 is connected to the pin 5 of the computing module U1, and the pin 2 of capacitor C9 is connected to the pin 6 of the computing module U1. Figure 6 The GND of the voltage stabilizing module is connected; the pin 1 of capacitor C10 is connected to the pin 5 of the computing module U1, and the pin 2 of capacitor C10 is connected to the Figure 6 GND of the voltage stabilizing module; the crystal oscillator Y1 pin 1 is connected to the pin 6 of the computing module U1, and the crystal oscillator Y1 pin 2 is connected to the pin 5 of the computing module U1;

[0061] In the reset circuit, the reset switch S1 pin 1 is connected to Figure 6 The GND of the voltage regulator module is connected, the reset switch S1 pin 2 is connected to the pin 7 of the operation module U1; the capacitor C8 pin 1 is connected to Figure 6 The GND of the voltage stabilizing module is connected, the pin 2 of the capacitor C8 is connected to the pin 7 of the computing module U1; the pin 1 of the resistor R13 is connected to Figure 6 The voltage of the voltage stabilizing module is connected to 3.3V, and the pin 2 of the resistor R13 is connected to the pin 7 of the computing module U1;

[0062] In the filter circuit, capacitor C16 pin 1 and Figure 6 The voltage of the voltage regulator module is 3.3V, and the capacitor C16 pin 2 is connected to Figure 6 The GND connection of the voltage regulator module; the capacitor C17 pin 1 and Figure 6 The voltage of the voltage regulator module is 3.3V, and the capacitor C17 pin 2 is connected to Figure 6 GND connection of voltage regulator module;

[0063] In the startup circuit, the resistor R3 pin 1 is connected to Figure 6 The GND of the voltage stabilizing module is connected, and the pin 2 of the resistor R3 is connected to the pin 60 of the computing module U1;

[0064] The operation module U1 is STM32F103RCT6; the model of the crystal oscillator Y1 is 12MHZ, the specifications of the capacitors C9 and C10 are 22PF, the specification of the capacitor C8 is 10uF, the resistance value of the resistor R13 is 10kΩ, the specifications of the capacitors C16 and C17 are 104, and the resistance value of the resistor R3 is 10kΩ.

[0065] The signal conversion module includes a diode D1, a chip NE555, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a pin header interface INT;

[0066] The diode D1 pin 1 is connected to the PA0 of the computing module U1 and to the pin 3 of the chip NE555. The diode D1 pin 2 is connected to the Figure 6 5V connection of voltage regulator module; NE555 chip pin 1 and Figure 6 The GND of the voltage regulator module is connected, the NE555 pin 2 of the chip is connected to the INT pin 1 of the pin header interface, the NE555 pin 3 of the chip is connected to the diode D1 pin 1, and the NE555 pin 4 of the chip is connected to the Figure 6 The 5V connection of the voltage regulator module, the NE555 chip pin 5 is connected to the capacitor C3 pin 1, the NE555 chip pin 6 is connected to the pin header interface INT pin 1, the NE555 chip pin 7 is connected to the resistor R1 pin 1, the resistor R2 pin 2, the NE555 chip pin 8 is connected to Figure 6 The 5V connection of the voltage regulator module; the capacitor C1 pin 1 is connected to the chip NE555 pin 8, and the capacitor C1 pin 2 is connected to Figure 6 The GND of the voltage regulator module is connected; the pin 1 of capacitor C2 is connected to the pin 8 of the chip NE555, and the pin 2 of capacitor C2 is connected to Figure 6 The GND of the voltage regulator module is connected; the capacitor C3 pin 1 is connected to the chip NE555 pin 5, and the capacitor C3 pin 2 is connected to Figure 6 The GND of the voltage regulator module is connected; the resistor R1 pin 1 is connected to the chip NE555 pin 7, and the resistor R1 pin 2 is connected to the chip NE555 pin 8; the resistor R2 pin 1 is connected to the chip NE555 pin 6, and the resistor R2 pin 2 is connected to the chip NE555 pin 7; the pin header interface INT pin 1 is connected to the chip NE555 pin 6, and the pin header interface INT pin 2 is connected to the chip NE555 pin 5;

[0067] Among them, the chip NE555 uses a voltage of 5V, the specifications of capacitor C1 are 106, the specifications of capacitor C2 are 104, the specifications of capacitor C3 are 104, the resistance values ​​of resistors R1 and R2 are 51 kΩ, the model of the pin header interface INT is 2*2.54mm, and the specification of diode D1 is 1N4148.

[0068] The pin 1 of the display module P1 is connected to the pin 12 of the computing module U1, and the pin 2 is connected to the Figure 6 The 3.3V connection of the voltage regulator module, the pin 3 is connected to the pin 29 of the computing module U1, and the pin 4 is connected to the pin 30 of the computing module U1;

[0069] Among them, the voltage of display module P1 is 3.3V, and the model is OLED12864;

[0070] The alarm module includes a resistor R4, a diode D2, a transistor Q1 and a buzzer LS1; wherein the resistor R4 pin 1 is connected to the transistor Q1 pin 2, the resistor R4 pin 2 is connected to the operation module U1 pin 16; the diode D2 pin 1 is connected to the transistor Q1 pin 3, the diode D2 pin 2 is connected to the operation module U1 pin 16; Figure 6 The 5V connection of the voltage regulator module; the transistor Q1 pin 1 is connected to the pin 12 of the operation module U1, the transistor Q1 pin 2 is connected to the resistor R4 pin 1, the transistor Q1 pin 3 is connected to the diode D2 pin 1, the transistor Q1 pin 3 is connected to the buzzer LS pin 2; the buzzer LS1 pin 1 is connected to Figure 6 The 5V connection of the voltage regulator module, the buzzer LS1 pin 2 and the transistor Q1 pin 3 are connected;

[0071] Among them, the resistance value of the resistor R4 is 1 kΩ, the model of the diode D2 is SS24, the model of the transistor Q1 is S8050, and the model of the buzzer LS1 is BUZZ.

[0072] The keyboard input module includes a pin header interface P3, a reset switch SW0, a reset switch SW1, a reset switch SW2, a reset switch SW3, a reset switch SW4, a reset switch SW5, a reset switch SW6, a reset switch SW7, a reset switch SW8, a reset switch SW9, a reset switch SW10, a reset switch SW11, a reset switch SW12, a reset switch SW13, a reset switch SW14 and a reset switch SW15;

[0073] Wherein, pin 1 of the pin header interface P3 is connected to pin 41 of the operation module U1, pin 2 of the pin header interface P3 is connected to pin 42 of the operation module U1, pin 3 of the pin header interface P3 is connected to pin 43 of the operation module U1, pin 4 of the pin header interface P3 is connected to pin 44 of the operation module U1, pin 5 of the pin header interface P3 is connected to pin 45 of the operation module U1, pin 6 of the pin header interface P3 is connected to pin 46 of the operation module U1, pin 7 of the pin header interface P3 is connected to pin 49 of the operation module U1, and pin 8 of the pin header interface P3 is connected to pin 50 of the operation module U1; pin 2 of the reset switch SW0 is connected to pin 1 of the pin header interface P3, and pin 1 of the reset switch SW0 is connected to pin 51 of the pin header interface P3. Pin 5 is connected; pin 2 of reset switch SW1 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW1 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW2 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW2 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW3 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW3 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW4 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW4 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW5 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW5 is connected to pin 6 of pin header interface P3; reset Pin 2 of position switch SW6 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW6 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW7 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW7 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW8 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW8 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW9 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW9 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW10 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW10 is connected to pin 7 of pin header interface P3; reset switch Pin 2 of SW11 is connected to pin 3 of the pin header interface P3, and pin 1 of reset switch SW11 is connected to pin 8 of the pin header interface P3; pin 2 of reset switch SW12 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW12 is connected to pin 5 of the pin header interface P3; pin 2 of reset switch SW13 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW13 is connected to pin 6 of the pin header interface P3; pin 2 of reset switch SW14 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW14 is connected to pin 7 of the pin header interface P3; pin 2 of reset switch SW15 is connected to pin 4 of the pin header interface P3, and pin 1 of reset switch SW15 is connected to pin 8 of the pin header interface P3;

[0074] Among them, the model of the pin header interface P3 is 8*2.54mm, and the model of the 16 reset switches is 6*6*5mm.

[0075] The voltage stabilizing module includes a power socket J1, a switch S1, a capacitor C15, a capacitor C13, a capacitor C14, a resistor R10, a reference voltage chip U4, a capacitor C11, a capacitor C12, a capacitor C18, a capacitor C4, a capacitor C5, a voltage stabilizer U3, a capacitor C6, a capacitor C7, a resistor R16 and a light emitting diode D3;

[0076] The power socket J1 is connected to the DC power supply 12V, the pin 1 of the power socket J1 is connected to the pin 3 of the switch S1, the pin 2 of the power socket J1 is connected to the pin 12 of the computing module U1, and the pin 3 of the power socket J1 is connected to the pin 12 of the computing module U1; the DC voltage 12V output by the switch S1 pin 1 is connected to the pin 1 of the capacitor C15, and the pin 3 of the switch S1 is connected to the pin 1 of the power socket J1; when the switch S1 is closed, the pin 1 of the switch S1 is connected to the pin 3 of the switch S1, and the pin 4 of the switch S1 is connected to the pin 5 of the switch S1; when the switch S1 is opened, the pin 1 of the switch S1 is connected to the pin 2 of the capacitor C15; The switch S1 pin 2 is connected, the switch S1 pin 4 is connected to the switch S1 pin 5; the capacitor C15 pin 1 is connected to the switch S1 pin 1, the capacitor C15 pin 2 is connected to the operation module U1 pin 12; the capacitor C13 pin 2 is connected to the switch S1 pin 1, the capacitor C13 pin 1 is connected to the operation module U1 pin 12; the capacitor C14 pin 2 is connected to the switch S1 pin 1, the capacitor C14 pin 1 is connected to the operation module U1 pin 12; the resistor R10 pin 1 is connected to the reference voltage chip U4 pin 2, the resistor R10 pin 2 is connected to the capacitor C14 pin 2; the base The pin 2 of the quasi-voltage chip U4 is connected to the pin 1 of the switch S1, the pin 3 of the reference voltage chip U4 is connected to the pin 1 of the resistor R10, the pin 4 of the reference voltage chip U4 is connected to the pin 12 of the operation module U1, the pin 6 of the reference voltage chip U4 outputs 5V, and is connected to the pin 2 of the capacitor C11, the pin 2 of the capacitor C12, and the pin 1 of the capacitor C18; the pin 1 of the capacitor C11 is connected to the pin 12 of the operation module U1, the pin 2 of the capacitor C11 is connected to the pin 6 of the reference voltage chip U4; the pin 1 of the capacitor C12 is connected to the pin 12 of the operation module U1, and the pin 2 of the capacitor C12 is connected to the reference voltage chip U4 The pin 6 of the voltage chip U4 is connected; the pin 1 of the capacitor C12 is connected to the pin 6 of the reference voltage chip U4, and the pin 2 of the capacitor C18 is connected to the pin 12 of the operation module U1; the pin 1 of the capacitor C4 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C4 is connected to the pin 3 of the voltage regulator U3; the pin 1 of the capacitor C5 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C5 is connected to the pin 3 of the voltage regulator U3; the pin 3 of the voltage regulator U3 inputs 5V and outputs 3.3V through the pin 2, the pin 1 of the voltage regulator U3 is connected to the pin 12 of the operation module U1, and the pin 2 of the voltage regulator U3 outputs 3.3V, connected to capacitor C6 pin 2, capacitor C7 pin 2, resistor R16 pin 1, regulator U3 pin 3 as 5V voltage input, connected to capacitor C4 pin 2, capacitor C5 pin 2; capacitor C6 pin 1 is connected to the operation module U1 pin 12, capacitor C6 pin 2 is connected to regulator U3 pin 2; capacitor C7 pin 1 is connected to the operation module U1 pin 12, capacitor C7 pin 2 is connected to regulator U3 pin 2; resistor R16 pin 1 is connected to regulator U3 pin 2, resistor R16 pin 2 is connected to light emitting diode D3 pin A; light emitting diode D3 pin A is connected to resistor R16 pin 2, light emitting diode D3 pin K is connected to the operation module U1 pin 12;.

[0077] Among them, the specification of the power socket J1 is PWR2.5, the specification of the switch S1 is 7*7mm hexagonal push button switch, the specification of the capacitor C15 is 10uF, the specification of the capacitor C13 is 106, the specification of the capacitor C14 is 104, the resistance of the resistor R10 is 1kΩ, the specification of the reference voltage chip U4 is REF195, the specification of the capacitor C11 is 106, the specification of the capacitor C12 is 104, the specification of the capacitor C18 is 10uF, the specification of the capacitor C4 is 104, the specification of the capacitor C5 is 104, the specification of the regulator U3 is AMS1117-3.3, the specification of the capacitor C6 is 104, the specification of the capacitor C7 is 104, the resistance of the resistor R16 is 500Ω, and the specification of the light-emitting diode D3 is a 5mm LED lamp.

[0078] In summary, this example realizes the mutual cooperation between the modules by setting up a control module, a signal conversion module, a display module, a keyboard input module, an alarm module and a voltage stabilizing module, and by the connection relationship that the control module is electrically connected to the signal conversion module, the display module, the keyboard input module, the alarm module and the voltage stabilizing module, so as to realize the automatic counting of A4 paper and make the whole paper counting process more automated. In addition, the setting of an alarm device can promptly remind the user when a problem occurs in the equipment, and when a remote communication device is further installed, online or offline troubleshooting can be performed.

[0079] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A paper counting and display device, characterized in that: The display device includes a control module, a signal conversion module and a paper container, wherein the control module has a built-in operation module; the paper container includes two capacitor plates arranged in pairs in parallel, and the space between the two capacitor plates is a storage space for the paper to be counted; the signal conversion module is connected to the two capacitor plates of the paper container, and forms a paper measurement signal by changing the capacitance value of the paper container after the paper to be counted is placed therein; the operation module is connected to the signal conversion module, and determines the number of paper in the paper container corresponding to the signal according to the paper measurement signal.

2. A paper counting and display device according to claim 1, characterized in that: The two capacitor plates are placed horizontally, and the paper to be counted is A4-sized printing paper.

3. A paper counting display device according to claim 2, characterized in that: The paper container also includes a plate-shaped paperweight with a fixed weight; the paperweight is formed of insulating material; when the paper to be counted is horizontally placed in the paper container, the paperweight presses on the paper to be counted so that the paper to be counted reaches the compression required for measurement.

4. A paper counting display device according to claim 2, characterized in that: The operation module includes a storage element storing data on the corresponding relationship between the paper measurement signal and the number of papers between the capacitor plates. It retrieves the corresponding number of papers to be counted according to the input paper measurement signal and outputs it to the control module for paper counting display.

5. A control circuit for a paper counting display device, used for the paper counting display device according to claim 1, characterized in that: The control circuit includes a control module, a signal conversion module, and a calculation module in the paper counting display device, and also includes a display module, a keyboard input module, an alarm module, and a voltage stabilizing module; the control module is electrically connected to the signal conversion module, the display module, the keyboard input module, the alarm module, and the voltage stabilizing module respectively; The control module includes an operation module U1 and peripheral circuits related to the operation module, wherein the peripheral circuits include a crystal oscillator circuit, a reset circuit, a filter circuit and a startup circuit; the hardware components of the operation module U1 include an STM32 embedded microcontroller; The signal conversion module is connected to the operation module U1 through the interface PA0, and is connected to the external capacitor plate through the pin interface INT; the signal conversion module converts the capacitance value between the two capacitor plates into an output frequency, and encodes the output frequency into a paper measurement signal; after receiving the paper measurement signal, the operation module decodes the paper measurement data in the signal by obtaining the output frequency of the paper measurement signal; The display module P1 is used to display the paper counting result, and is connected to the operation module U1 through interfaces PB10 and PB11; The alarm module is connected to the computing module U1 via the PA2 port; the alarm module is used for fault alarm during the paper counting process; the fault alarm information of the alarm module includes information displayed by the display module; The keyboard input module is connected to the computing module U1 via the pin header interface P3, and is used to control the current working mode of the paper counting and display device, including the measurement and calibration information mode, the paper test mode, and the paper placement and determination and display of the counting result mode; The input end of the voltage stabilizing module is connected to a 12V power supply, and the output end is electrically connected to the power supply end of the control module. The voltage stabilizing module is used to convert the input power supply voltage 12V into voltages of 5V and 3.3V, and is connected to the signal conversion module and the alarm module through the voltage 5V output end to power them, and is connected to the operation module U1 and the display module through the voltage 3.3V output end to power them.

6. The control circuit of a paper counting and display device according to claim 5, characterized in that: In the peripheral circuit, the crystal oscillator circuit is composed of capacitor C9, capacitor C10 and crystal oscillator Y1, the reset circuit is composed of reset switch S1, capacitor C8 and resistor R13, the filter circuit is composed of capacitor C16 and capacitor C17, and the start-up circuit is composed of resistor R3; Pin 32, pin 48, pin 64, pin 19, and pin 13 of the computing module U1 are connected to the voltage 3.3V terminal of the voltage stabilizing module, and pin 31, pin 47, pin 63, pin 18, and pin 12 of the computing module U1 are connected to the GND terminal of the voltage stabilizing module; In the crystal oscillator circuit, the pin 1 of capacitor C9 is connected to the pin 5 of the operation module U1, and the pin 2 of capacitor C9 is connected to the GND of the voltage stabilizing module; the pin 1 of capacitor C10 is connected to the pin 5 of the operation module U1, and the pin 2 of capacitor C10 is connected to the GND of the voltage stabilizing module; the pin 1 of crystal oscillator Y1 is connected to the pin 6 of the operation module U1, and the pin 2 of crystal oscillator Y1 is connected to the pin 5 of the operation module U1; In the reset circuit, the reset switch S1 pin 1 is connected to the GND of the voltage regulator module, and the reset switch S1 pin 2 is connected to the pin 7 of the computing module U1; the capacitor C8 pin 1 is connected to the GND of the voltage regulator module, and the capacitor C8 pin 2 is connected to the pin 7 of the computing module U1; the resistor R13 pin 1 is connected to the voltage 3.3V of the voltage regulator module, and the resistor R13 pin 2 is connected to the pin 7 of the computing module U1; In the filter circuit, the pin 1 of capacitor C16 is connected to the voltage 3.3V of the voltage regulator module, and the pin 2 of capacitor C16 is connected to the GND of the voltage regulator module; the pin 1 of capacitor C17 is connected to the voltage 3.3V of the voltage regulator module, and the pin 2 of capacitor C17 is connected to the GND of the voltage regulator module; In the startup circuit, the resistor R3 pin 1 is connected to the GND of the voltage regulator module, and the resistor R3 pin 2 is connected to the pin 60 of the computing module U1; The computing module U1 is STM32F103RCT6.

7. The control circuit of a paper counting and display device according to claim 5, characterized in that: The signal conversion module includes a diode D1, a chip NE555, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a pin header interface INT; Diode D1 pin 1 is connected to PA0 of the operation module U1, and is also connected to pin 3 of chip NE555, and diode D1 pin 2 is connected to 5V of the voltage regulator module; chip NE555 pin 1 is connected to GND of the voltage regulator module, chip NE555 pin 2 is connected to pin 1 of the pin header interface INT, chip NE555 pin 3 is connected to diode D1 pin 1, chip NE555 pin 4 is connected to 5V of the voltage regulator module, chip NE555 pin 5 is connected to capacitor C3 pin 1, chip NE555 pin 6 is connected to pin 1 of the pin header interface INT, chip NE555 pin 7 is connected to resistor R1 pin 1 and resistor R2 pin 2, and chip NE555 pin 8 is connected to 5V of the voltage regulator module; capacitor C1 Pin 1 is connected to pin 8 of chip NE555, and pin 2 of capacitor C1 is connected to the GND of the voltage stabilizing module; pin 1 of capacitor C2 is connected to pin 8 of chip NE555, and pin 2 of capacitor C2 is connected to the GND of the voltage stabilizing module; pin 1 of capacitor C3 is connected to pin 5 of chip NE555, and pin 2 of capacitor C3 is connected to the GND of the voltage stabilizing module; pin 1 of resistor R1 is connected to pin 7 of chip NE555, and pin 2 of resistor R1 is connected to pin 8 of chip NE555; pin 1 of resistor R2 is connected to pin 6 of chip NE555, and pin 2 of resistor R2 is connected to pin 7 of chip NE555; pin 1 of pin header interface INT is connected to pin 6 of chip NE555, and pin 2 of pin header interface INT is connected to pin 5 of chip NE555.

8. The control circuit of a paper counting and display device according to claim 5, characterized in that: Pin 1 of the display module P1 is connected to pin 12 of the computing module U1, pin 2 is connected to 3.3V of the voltage regulator module, pin 3 is connected to pin 29 of the computing module U1, and pin 4 is connected to pin 30 of the computing module U1; Among them, the voltage of display module P1 is 3.3V, and the model is OLED12864; The alarm module includes a resistor R4, a diode D2, a transistor Q1 and a buzzer LS1; wherein the resistor R4 pin 1 is connected to the transistor Q1 pin 2, and the resistor R4 pin 2 is connected to the operation module U1 pin 16; the diode D2 pin 1 is connected to the transistor Q1 pin 3, and the diode D2 pin 2 is connected to the 5V of the voltage stabilizing module; the transistor Q1 pin 1 is connected to the operation module U1 pin 12, the transistor Q1 pin 2 is connected to the resistor R4 pin 1, the transistor Q1 pin 3 is connected to the diode D2 pin 1, and the transistor Q1 pin 3 is connected to the buzzer LS pin 2; the buzzer LS1 pin 1 is connected to the 5V of the voltage stabilizing module, and the buzzer LS1 pin 2 is connected to the transistor Q1 pin 3; Among them, the resistance value of the resistor R4 is 1 kΩ, the model of the diode D2 is SS24, the model of the transistor Q1 is S8050, and the model of the buzzer LS1 is BUZZ.

9. The control circuit of a paper counting and display device according to claim 6, characterized in that: The keyboard input module includes a pin header interface P3, a reset switch SW0, a reset switch SW1, a reset switch SW2, a reset switch SW3, a reset switch SW4, a reset switch SW5, a reset switch SW6, a reset switch SW7, a reset switch SW8, a reset switch SW9, a reset switch SW10, a reset switch SW11, a reset switch SW12, a reset switch SW13, a reset switch SW14 and a reset switch SW15; Wherein, pin 1 of the pin header interface P3 is connected to pin 41 of the operation module U1, pin 2 of the pin header interface P3 is connected to pin 42 of the operation module U1, pin 3 of the pin header interface P3 is connected to pin 43 of the operation module U1, pin 4 of the pin header interface P3 is connected to pin 44 of the operation module U1, pin 5 of the pin header interface P3 is connected to pin 45 of the operation module U1, pin 6 of the pin header interface P3 is connected to pin 46 of the operation module U1, pin 7 of the pin header interface P3 is connected to pin 49 of the operation module U1, and pin 8 of the pin header interface P3 is connected to pin 50 of the operation module U1; pin 2 of the reset switch SW0 is connected to pin 1 of the pin header interface P3, and pin 1 of the reset switch SW0 is connected to pin 51 of the pin header interface P3. Pin 5 is connected; pin 2 of reset switch SW1 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW1 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW2 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW2 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW3 is connected to pin 1 of pin header interface P3, and pin 1 of reset switch SW3 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW4 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW4 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW5 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW5 is connected to pin 6 of pin header interface P3; reset Pin 2 of position switch SW6 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW6 is connected to pin 7 of pin header interface P3; pin 2 of reset switch SW7 is connected to pin 2 of pin header interface P3, and pin 1 of reset switch SW7 is connected to pin 8 of pin header interface P3; pin 2 of reset switch SW8 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW8 is connected to pin 5 of pin header interface P3; pin 2 of reset switch SW9 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW9 is connected to pin 6 of pin header interface P3; pin 2 of reset switch SW10 is connected to pin 3 of pin header interface P3, and pin 1 of reset switch SW10 is connected to pin 7 of pin header interface P3; reset switch Pin 2 of SW11 is connected to pin 3 of the pin header interface P3, and pin 1 of the reset switch SW11 is connected to pin 8 of the pin header interface P3; pin 2 of the reset switch SW12 is connected to pin 4 of the pin header interface P3, and pin 1 of the reset switch SW12 is connected to pin 5 of the pin header interface P3; pin 2 of the reset switch SW13 is connected to pin 4 of the pin header interface P3, and pin 1 of the reset switch SW13 is connected to pin 6 of the pin header interface P3; pin 2 of the reset switch SW14 is connected to pin 4 of the pin header interface P3, and pin 1 of the reset switch SW14 is connected to pin 7 of the pin header interface P3; pin 2 of the reset switch SW15 is connected to pin 4 of the pin header interface P3, and pin 1 of the reset switch SW15 is connected to pin 8 of the pin header interface P3.

10. The control circuit of a paper counting and display device according to claim 6, characterized in that: The voltage stabilizing module includes a power socket J1, a switch S1, a capacitor C15, a capacitor C13, a capacitor C14, a resistor R10, a reference voltage chip U4, a capacitor C11, a capacitor C12, a capacitor C18, a capacitor C4, a capacitor C5, a voltage stabilizer U3, a capacitor C6, a capacitor C7, a resistor R16 and a light emitting diode D3; The power socket J1 is connected to the DC power supply 12V, the pin 1 of the power socket J1 is connected to the pin 3 of the switch S1, the pin 2 of the power socket J1 is connected to the pin 12 of the computing module U1, and the pin 3 of the power socket J1 is connected to the pin 12 of the computing module U1; the DC voltage 12V output by the switch S1 pin 1 is connected to the pin 1 of the capacitor C15, and the pin 3 of the switch S1 is connected to the pin 1 of the power socket J1; when the switch S1 is closed, the pin 1 of the switch S1 is connected to the pin 3 of the switch S1, and the pin 4 of the switch S1 is connected to the pin 5 of the switch S1; when the switch S1 is opened, the pin 1 of the switch S1 is connected to the pin 2 of the capacitor C15; The switch S1 pin 2 is connected, the switch S1 pin 4 is connected to the switch S1 pin 5; the capacitor C15 pin 1 is connected to the switch S1 pin 1, the capacitor C15 pin 2 is connected to the operation module U1 pin 12; the capacitor C13 pin 2 is connected to the switch S1 pin 1, the capacitor C13 pin 1 is connected to the operation module U1 pin 12; the capacitor C14 pin 2 is connected to the switch S1 pin 1, the capacitor C14 pin 1 is connected to the operation module U1 pin 12; the resistor R10 pin 1 is connected to the reference voltage chip U4 pin 2, the resistor R10 pin 2 is connected to the capacitor C14 pin 2; the base The pin 2 of the quasi-voltage chip U4 is connected to the pin 1 of the switch S1, the pin 3 of the reference voltage chip U4 is connected to the pin 1 of the resistor R10, the pin 4 of the reference voltage chip U4 is connected to the pin 12 of the operation module U1, the pin 6 of the reference voltage chip U4 outputs 5V, and is connected to the pin 2 of the capacitor C11, the pin 2 of the capacitor C12, and the pin 1 of the capacitor C18; the pin 1 of the capacitor C11 is connected to the pin 12 of the operation module U1, the pin 2 of the capacitor C11 is connected to the pin 6 of the reference voltage chip U4; the pin 1 of the capacitor C12 is connected to the pin 12 of the operation module U1, and the pin 2 of the capacitor C12 is connected to the reference voltage chip U4 The pin 6 of the voltage chip U4 is connected; the pin 1 of the capacitor C12 is connected to the pin 6 of the reference voltage chip U4, and the pin 2 of the capacitor C18 is connected to the pin 12 of the operation module U1; the pin 1 of the capacitor C4 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C4 is connected to the pin 3 of the voltage regulator U3; the pin 1 of the capacitor C5 is connected to the pin GND of the voltage regulator U3, and the pin 2 of the capacitor C5 is connected to the pin 3 of the voltage regulator U3; the pin 3 of the voltage regulator U3 inputs 5V and outputs 3.3V through the pin 2, the pin 1 of the voltage regulator U3 is connected to the pin 12 of the operation module U1, and the pin 2 of the voltage regulator U3 outputs 3.3V, connected to capacitor C6 pin 2, capacitor C7 pin 2, resistor R16 pin 1, regulator U3 pin 3 as 5V voltage input, connected to resistor C4 pin 2, resistor C5 pin 2; capacitor C6 pin 1 is connected to the operation module U1 pin 12, capacitor C6 pin 2 is connected to regulator U3 pin 2; capacitor C7 pin 1 is connected to the operation module U1 pin 12, capacitor C7 pin 2 is connected to regulator U3 pin 2; resistor R16 pin 1 is connected to regulator U3 pin 2, resistor R16 pin 2 is connected to light emitting diode D3 pin A; light emitting diode D3 pin A is connected to resistor R16 pin 2, and light emitting diode D3 pin K is connected to the operation module U1 pin 12. .

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