Single-chip microcomputer industrial weighing control device

Abstract

A single-chip microcomputer industrial weighing control device comprises a single-chip microcomputer U7, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a nixie tube display circuit and an output isolation circuit. The single-chip microcomputer is connected with the data storage circuit, the force sensor data sampling circuit, the nixie tube display circuit, the output isolation circuit, the RS232 communication circuit and the RS485 communication circuit. Tasks of measurement, data processing, result display and the like can be automatically completed through the single chip microcomputer, the data storage circuit, the force sensor data sampling circuit, the RS232 communication circuit and the RS485 communication circuit, the requirement for manual operation is reduced, and efficiency is improved. Due to the programmability of the single-chip microcomputer, a user can upgrade the system or add new functions according to needs, so that the system has good expansibility, and compared with a complex industrial control system, the single-chip microcomputer generally has lower hardware and development cost and is suitable for projects with limited budget.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing devices, in particular to a single-chip industrial weighing control device. Background Art

[0002] With the continuous improvement of industrialization, the demand for weighing items in various industries is also growing. Whether it is product control on the production line, load monitoring of truck transportation, or measurement of warehouse inventory, efficient and accurate weighing technology is required. Now many weighing systems use PLC for control, but the initial investment cost and maintenance cost of PLC systems may be relatively high, and PLCs are usually large in size and may not be suitable for use in space-constrained applications. In addition, compared with single-chip microcomputer systems, PLCs and other industrial weighing control devices usually have higher energy consumption, which may increase operating costs and affect environmental sustainability. Single-chip microcomputer control systems have gradually become an important tool to meet these needs due to their high precision and low cost.

[0003] Therefore, a single-chip industrial weighing control device is needed to solve this problem. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a single-chip industrial weighing control device, which effectively solves the above problems.

[0005] The technical solution is that the utility model includes a single-chip microcomputer U7, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a digital tube display circuit and an output isolation circuit, and the single-chip microcomputer is respectively connected to the data storage circuit, the force sensor data sampling circuit, the digital tube display circuit, the output isolation circuit, the RS232 communication circuit and the RS485 communication circuit.

[0006] Furthermore, the power supply circuit includes a voltage conversion chip U1, a capacitor C5, a capacitor C7 and a capacitor C4, pin 3 of the voltage conversion chip U1 is connected to the external input voltage, both ends of the capacitor C5 are respectively connected to pin 3 and the negative electrode of the voltage conversion chip U1, both ends of the capacitor C5 are connected in parallel with a capacitor C6, both ends of the capacitor C7 are respectively connected to pin 2 and the negative electrode of the voltage conversion chip U1, both ends of the capacitor C7 are connected in parallel with a capacitor C4, pin 4 of the voltage conversion chip U1 is connected to the series connection point of capacitor C7 and pin 2, and pin 1 of the voltage conversion chip U1 is connected to the negative electrode.

[0007] Furthermore, the power supply circuit also includes an LED diode D2 and a resistor R8, the anode of the LED diode D2 is connected to the series connection point of the capacitor C4 and the pin 2 of the voltage conversion chip U1, the cathode of the LED diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the negative electrode.

[0008] Furthermore, the data storage circuit includes a data storage chip U3, and pins 5 and 6 of the data storage chip U3 are respectively connected to pins 50 and 51 of the single-chip computer U7.

[0009] Furthermore, the force sensor data sampling circuit includes a data sampling chip U9 and an external interface plug-in P2, pins 15 and 16 of the data sampling chip U9 are respectively connected to pins 36 and 37 of the microcontroller U7, and pins 4 and 3 of the external interface plug-in P2 are respectively connected to pins 8 and 7 of the data sampling chip U9.

[0010] Furthermore, the RS232 communication circuit includes a 232 communication chip U4, a pin 10 of the 232 communication chip U4 is connected to a pin 16 of the single-chip microcomputer U7, and a pin 7 of the 232 communication chip U4 outputs data.

[0011] Furthermore, the RS485 communication circuit includes a 485 communication chip U2, and pin 1, pin 2 and pin 4 of the 485 communication chip U2 are respectively connected to pin 16, pin 35 and pin 17 of the single chip computer U7.

[0012] Furthermore, the digital tube driving circuit includes a digital tube driving chip U8, a 4-bit digital tube and 4 bit selection circuits, and pins 9, 11, 12 and 14 of the digital tube driving chip U8 are respectively connected to pins 23, 24, 25 and 26 of the microcontroller U7.

[0013] Furthermore, the output isolation circuit includes an output isolation chip U10, an output isolation chip U11 and a pin connector P3, pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U10 are respectively connected to pin 45, pin 44, pin 43 and pin 42 of the microcontroller U7, pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U11 are respectively connected to pin 41, pin 40, pin 39 and pin 38 of the microcontroller U7, pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U10 and pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U11 are respectively connected to the port of the pin connector P3.

[0014] The beneficial effects of the utility model are: a single chip microcomputer, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a digital tube display circuit and an output isolation circuit

[0015] 1. Through the single-chip microcomputer, data storage circuit, force sensor data sampling circuit, RS232 communication circuit and RS485 communication circuit, it can automatically complete tasks such as measurement, data processing and result display, reducing the need for manual operation and improving efficiency.

[0016] 2. Due to the programmability of the MCU, users can upgrade the system or add new functions as needed, making the system scalable. Compared with complex industrial control systems, MCUs usually have lower hardware and development costs and are suitable for projects with limited budgets. MCUs usually have lower energy consumption, which helps save energy and reduce emissions.

[0017] 3. Through sensors and A / D converters, the microcontroller weighing control system can provide high-precision weight measurement to meet the accuracy requirements in industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the principle block diagram of the utility model single chip industrial weighing control device;

[0019] Figure 2 This is the circuit diagram of the single-chip microcomputer in the single-chip microcomputer industrial weighing control device of the utility model;

[0020] Figure 3 This is the power supply circuit diagram of the single-chip industrial weighing control device of the utility model;

[0021] Figure 4 This is a data storage circuit diagram of the single-chip industrial weighing control device of the utility model;

[0022] Figure 5 This is a circuit diagram of the force sensor data sampling in the single-chip industrial weighing control device of the utility model;

[0023] Figure 6 This is the RS232 communication circuit diagram of the single-chip industrial weighing control device of the utility model;

[0024] Figure 7 This is the RS485 communication circuit diagram of the single-chip industrial weighing control device of the utility model;

[0025] Figure 8 This is the digital tube display circuit diagram of the utility model single chip industrial weighing control device;

[0026] Fig. 9The utility model is an output isolation circuit diagram of the single-chip industrial weighing control device. DETAILED DESCRIPTION

[0027] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0028] Example:

[0029] Depend on Figure 1 to Figure 2 It is given that the utility model includes a single-chip microcomputer U7, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a digital tube display circuit and an output isolation circuit. The single-chip microcomputer is respectively connected to the data storage circuit, the force sensor data sampling circuit, the digital tube display circuit, the output isolation circuit, the RS232 communication circuit and the RS485 communication circuit.

[0030] In an optional embodiment, Figure 3 A structural schematic diagram of an optional power supply circuit provided in an embodiment of the present application, the power supply circuit includes a voltage conversion chip U1, a capacitor C5, a capacitor C7 and a capacitor C4, pin 3 of the voltage conversion chip U1 is connected to an external input voltage, pin 2 of the voltage conversion chip U1 is an output voltage terminal, pin 2 of the voltage conversion chip U1 is an output voltage terminal, the output voltage terminal of the step-down chip is powered by the single-chip microcomputer U7, the force sensor data sampling circuit, the digital tube display circuit, the data storage circuit, the output isolation circuit, the RS485 communication circuit and the RS232 communication circuit, the two ends of the capacitor C5 are respectively connected to pin 3 and the negative electrode of the voltage conversion chip U1, the two ends of the capacitor C5 are connected in parallel with a capacitor C6, the two ends of the capacitor C7 are respectively connected to pin 2 and the negative electrode of the voltage conversion chip U1, the two ends of the capacitor C7 are connected in parallel with a capacitor C4, the pin 4 of the voltage conversion chip U1 is connected to the series connection point of capacitor C7 and pin 2, the pin 1 of the voltage conversion chip U1 is connected to the negative electrode, and the capacitors C5, C6, C4 and C7 function as filtering.

[0031] Specifically, the power supply circuit also includes an LED diode D2 and a resistor R8, the anode of the LED diode D2 is connected to the series connection point of the capacitor C4 and the pin 2 of the voltage conversion chip U1, the cathode of the LED diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the negative electrode, forming a power indicator light circuit.

[0032] In an optional embodiment, Figure 4A structural schematic diagram of an optional data storage circuit provided for an embodiment of the present application, the data storage circuit includes a data storage chip U3, pin 5 and pin 6 of the data storage chip U3 are respectively connected to pin 50 and pin 51 of the single-chip microcomputer U7, pin 51 of the single-chip microcomputer U7 provides the clock signal required for normal operation for pin 6 of the storage chip U3 in the data storage circuit, and pin 50 of the single-chip microcomputer U7 is the pin 5 of the storage chip U3 in the data storage circuit, which will write or read data according to the level change of pin 50 of the single-chip microcomputer U7.

[0033] In an optional embodiment, Figure 5 A structural schematic diagram of an optional force sensor data sampling circuit provided in an embodiment of the present application, the force sensor data sampling circuit includes a data sampling chip U9 and an external interface plug-in P2, pins 15 and 16 of the data sampling chip U9 are respectively connected to pins 36 and 37 of the single-chip microcomputer U7, pin 36 of the single-chip microcomputer U7 is the clock signal required for the normal operation of pin 15 of the data sampling chip U9, pin 16 of the data sampling chip U9 outputs the detected force sensor signal and transmits it to pin 37 of the single-chip microcomputer U7 to realize data reading, and pins 4 and 3 of the external interface plug-in P2 are respectively connected to pins 8 and 7 of the data sampling chip U9.

[0034] In an optional embodiment, Figure 6 A structural schematic diagram of an optional RS232 communication circuit provided for an embodiment of the present application, the RS232 communication circuit includes a 232 communication chip U4, pin 10 of the 232 communication chip U4 is connected to pin 16 of the single-chip computer U7, pin 7 of the 232 communication chip U4 outputs data, and pin 16 of the single-chip computer U7 completes the external transmission of data by sending weighing data to pin 10 of the 232 communication chip U4 through level conversion.

[0035] In an optional embodiment, Figure 7 A structural schematic diagram of an optional RS485 communication circuit provided for an embodiment of the present application, wherein the RS485 communication circuit includes a 485 communication chip U2, wherein pin 1, pin 2 and pin 4 of the 485 communication chip U2 are respectively connected to pin 16, pin 35 and pin 17 of the single-chip microcomputer U7, and pin 2 of the 485 communication chip U2 is an enable pin of the transceiver chip, and the transceiver signal is controlled by pin 35 of the single-chip microcomputer U7, thereby controlling the data sending or receiving mode.

[0036] In an optional embodiment, Figure 8A structural schematic diagram of an optional digital tube driving circuit provided in an embodiment of the present application, wherein the digital tube driving circuit includes a digital tube driving chip U8, a 4-bit digital tube and 4 bit selection circuits, the digital tube driving chip U8 drives the segment selection of the 4-bit digital tube, and adopts 4 bit selection circuits to drive the bit selection of the 4-bit common cathode digital tube U2, pins 9, 11, 12 and 14 of the digital tube driving chip U8 are respectively connected to pins 23, 24, 25 and 26 of the microcontroller U7, the bit selection circuit includes an NPN transistor Q4, a resistor R20 and a resistor R27, the base of the NPN transistor Q4 is connected to the resistor R20, the other end of the resistor R20 is connected to CR1, the two ends of the resistor R27 are respectively connected to the base and emitter of the NPN transistor Q4, and the structures of the four bit selection circuits are the same.

[0037] In an optional embodiment, Fig. 9 A schematic diagram of the structure of an optional output isolation circuit provided in an embodiment of the present application, wherein the output isolation circuit comprises an output isolation chip U10, an output isolation chip U11 and a pin connector P3, wherein pins 2, 4, 6 and 8 of the output isolation chip U10 are respectively connected to pins 45, 44, 43 and 42 of the single-chip microcomputer U7, and pins 45, 44, 43 and 42 of the single-chip microcomputer U7 are configured to be a push-pull output mode, and pins 2, 4, 6 and 8 of the output isolation chip U10 are respectively connected to pins 1, 44, 43 and 42 of the output isolation chip U10 by outputting high and low levels. 3. Pin 5 and pin 7 form a circuit loop, pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U11 are respectively connected to pin 41, pin 40, pin 39 and pin 38 of the single-chip computer U7, and the pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U11 are respectively connected to pin 1, pin 3, pin 5 and pin 7 of the output isolation chip U11 by outputting high and low levels to form a circuit loop, and pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U10 and pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U11 are respectively connected to the port of the pin connector P3.

[0038] In this embodiment, the single-chip computer U7 can adopt the STM32F103RCT6 chip, the data sampling chip U9 can adopt the ADS1230 analog-to-digital conversion chip, the RS232 communication chip can adopt the SP3232 chip, the RS4485 communication chip can adopt the TPT487 chip, the voltage conversion chip U1 can adopt the LM1117-3.3 chip, the digital tube driver chip U8 can adopt the 74HC595 chip, the data storage chip U3 can adopt the FM24C32 data storage chip, and the output isolation chip U19 can adopt the ELQ3H7 chip.

[0039] The beneficial effects of the utility model are: a single chip microcomputer, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a digital tube display circuit and an output isolation circuit

[0040] 1. Through the single-chip microcomputer, data storage circuit, force sensor data sampling circuit, RS232 communication circuit and RS485 communication circuit, it can automatically complete tasks such as measurement, data processing and result display, reducing the need for manual operation and improving efficiency.

[0041] 2. Due to the programmability of the MCU, users can upgrade the system or add new functions as needed, making the system scalable. Compared with complex industrial control systems, MCUs usually have lower hardware and development costs and are suitable for projects with limited budgets. MCUs usually have lower energy consumption, which helps save energy and reduce emissions.

[0042] 3. Through sensors and A / D converters, the microcontroller weighing control system can provide high-precision weight measurement to meet the accuracy requirements in industrial production.

[0043] The above-mentioned specific implementation modes / embodiments are specific implementation modes of the utility model, which are used to illustrate the concept of the utility model, are explanatory and exemplary, and should not be interpreted as limiting the implementation modes of the utility model and the scope of the utility model. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and the specification of this application. These technical solutions include technical solutions that make any obvious replacements and modifications to the embodiments described herein, which are within the scope of protection of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A single-chip industrial weighing control device, characterized in that: It includes a single-chip microcomputer U7, a power supply circuit, a data storage circuit, a force sensor data sampling circuit, an RS232 communication circuit, an RS485 communication circuit, a digital tube display circuit and an output isolation circuit. The single-chip microcomputer is respectively connected to the data storage circuit, the force sensor data sampling circuit, the digital tube display circuit, the output isolation circuit, the RS232 communication circuit and the RS485 communication circuit.

2. The single-chip industrial weighing control device according to claim 1, characterized in that: The power supply circuit includes a voltage conversion chip U1, a capacitor C5, a capacitor C7 and a capacitor C4. Pin 3 of the voltage conversion chip U1 is connected to an external input voltage. Pin 2 of the voltage conversion chip U1 is an output voltage terminal. Both ends of the capacitor C5 are respectively connected to pin 3 and a negative electrode of the voltage conversion chip U1. Both ends of the capacitor C5 are connected in parallel with a capacitor C6. Both ends of the capacitor C7 are respectively connected to pin 2 and a negative electrode of the voltage conversion chip U1. Both ends of the capacitor C7 are connected in parallel with a capacitor C4. Pin 4 of the voltage conversion chip U1 is connected to a series connection point of capacitor C7 and pin 2. Pin 1 of the voltage conversion chip U1 is connected to a negative electrode.

3. The single-chip industrial weighing control device according to claim 2 is characterized in that: The power supply circuit also includes an LED diode D2 and a resistor R8, wherein the anode of the LED diode D2 is connected to the series connection point of the capacitor C4 and the pin 2 of the voltage conversion chip U1, the cathode of the LED diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the negative electrode.

4. The single-chip industrial weighing control device according to claim 1 is characterized in that: The data storage circuit comprises a data storage chip U3, and pins 5 and 6 of the data storage chip U3 are respectively connected to pins 50 and 51 of the single chip computer U7.

5. The single-chip industrial weighing control device according to claim 1, characterized in that: The force sensor data sampling circuit includes a data sampling chip U9 and an external interface plug-in P2. Pins 15 and 16 of the data sampling chip U9 are respectively connected to pins 36 and 37 of the microcontroller U7. Pins 4 and 3 of the external interface plug-in P2 are respectively connected to pins 8 and 7 of the data sampling chip U9.

6. The single-chip industrial weighing control device according to claim 1, characterized in that: The RS232 communication circuit includes a 232 communication chip U4, a pin 10 of the 232 communication chip U4 is connected to a pin 16 of the single-chip microcomputer U7, and a pin 7 of the 232 communication chip U4 outputs data.

7. The single-chip industrial weighing control device according to claim 1, characterized in that: The RS485 communication circuit comprises a 485 communication chip U2, and pins 1, 2 and 4 of the 485 communication chip U2 are respectively connected to pins 16, 35 and 17 of the single chip microcomputer U7.

8. The single-chip industrial weighing control device according to claim 1, characterized in that: The digital tube driving circuit includes a digital tube driving chip U8, a 4-digit digital tube and 4 bit selection circuits. Pins 9, 11, 12 and 14 of the digital tube driving chip U8 are respectively connected to pins 23, 24, 25 and 26 of the single-chip microcomputer U7.

9. The single-chip industrial weighing control device according to claim 1, characterized in that: The output isolation circuit includes an output isolation chip U10, an output isolation chip U11 and a pin connector P3. Pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U10 are respectively connected to pin 45, pin 44, pin 43 and pin 42 of the single-chip microcomputer U7, pin 2, pin 4, pin 6 and pin 8 of the output isolation chip U11 are respectively connected to pin 41, pin 40, pin 39 and pin 38 of the single-chip microcomputer U7, pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U10 and pin 15, pin 13, pin 11 and pin 9 of the output isolation chip U11 are respectively connected to the port of the pin connector P3.

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