Paperless recorder

Abstract

The utility model discloses a paperless recorder, which comprises a main board, an acquisition board, a communication board and a power board, a first microcontroller, a first communication module, a main power supply adjusting circuit and a storage unit are integrated on the main board; a second microcontroller and an acquisition power supply circuit are integrated on the acquisition board; a communication power supply circuit, a second communication module and a first isolation chip are integrated on the communication board; an AC-DC power supply module, a power relay and a logic optocoupler are integrated on the power supply board. According to the utility model, the power supply adjusting module is independently integrated on each board card, so that the electromagnetic compatibility, the system stability and the expansibility of the system are improved. And different types of data or files are subjected to regional division storage, so that the data management function is optimized, and the system stability is enhanced. According to the design of a data acquisition function, cooperative control of a solid-state relay and an analog switch is adopted, and a dual-isolation architecture and a signal conditioning preposition are matched, so that the sampling precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data acquisition field, concretely is a paperless recorder. BACKGROUND

[0002] Paperless recorder is a kind of industrial automation equipment with digital storage to replace traditional paper record, for real-time acquisition, storage and display temperature, pressure, flow process data, completely replace traditional paper recorder, with efficient, environmental protection, intelligent characteristics.

[0003] The signal of existing paperless recorder acquisition, record and display is relatively single, lacks gain adjustment and intelligent signal identification. And generally adopt centralized power management mode, there are defects in system reliability, power management efficiency, flexibility and electromagnetic compatibility etc. Lack data storage function division, limit the data storage and access efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of prior art, the utility model provides a paperless recorder, solves above -mentioned problem.

[0005] In order to realize above -mentioned purpose, the utility model provides following technical scheme: a paperless recorder, including mainboard, acquisition board, communication board, power board;

[0006] First microcontroller, first communication module, total power adjustment circuit and storage unit are integrated on the mainboard;

[0007] Second microcontroller and acquisition power supply circuit are integrated on the acquisition board;

[0008] Communication power supply circuit, second communication module and first isolation chip are integrated on the communication board;

[0009] AC-DC power module, power relay and logic optocoupler are integrated on the power board;

[0010] First communication module and second communication module are RS485 communication module.

[0011] Preferably, first microcontroller communicates with second microcontroller by first communication module;

[0012] Second microcontroller is connected with third isolation chip, third isolation chip is connected with analog switch, analog switch is connected with solid state relay, solid state relay is connected with operational amplifier, operational amplifier is connected with ADC chip, ADC chip is connected with second isolation chip, second isolation chip is connected with second microcontroller;Operational amplifier and ADC chip are connected with reference source respectively.

[0013] Preferably, the storage unit comprises a non-volatile storage medium and an SDRAM cache, the non-volatile storage medium comprising a NOR-FLASH, an EEPROM, an eMMC;

[0014] The NOR-FLASH is used for storing running parameters;

[0015] The EEPROM is used for storing control programs and related configuration parameters;

[0016] The eMMC is used for storing collected industrial field data in time stamp.

[0017] Preferably, the first microcontroller is connected with the first isolation chip through a serial port, the first isolation chip is connected with the second communication module, and the second communication module is used for communication with an upper computer.

[0018] Preferably, the first microcontroller is connected with the logic optocoupler, the logic optocoupler is connected with the power relay, and the power relay is used for realizing accurate control of external high-power equipment.

[0019] Preferably, the first microcontroller is connected with a high-speed USB chip through a USB2.0 ULPI interface, and the high-speed USB chip is connected with a USB interface and is used for high-speed and reliable data communication between the external USB equipment.

[0020] Preferably, the first microcontroller is connected with a touch screen, a button, a first temperature and humidity sensor and an RTC.

[0021] Preferably, the second microcontroller is connected with a second temperature and humidity sensor and is used for providing a reference temperature for collection of a temperature signal.

[0022] Preferably, the communication board further comprises DC24V and DC5V power distribution output interfaces.

[0023] The utility model has the following remarkable beneficial effects: the decentralization power management mode of independently integrating power adjustment modules on each board card improves electromagnetic compatibility, system stability and expandability of the system. Regional division storage is carried out on different types of data or files, and data management function is optimized, and system stability is enhanced. The design of the data acquisition function adopts the cooperative control of the solid-state relay and the analog switch, cooperates the architecture of double isolation and the setting of signal conditioning preamplifier, and improves the sampling precision. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only part of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0025] Figure 1 The architecture block diagram of the paperless recorder. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0027] Referring to Figure 1 The paperless recorder includes a mainboard, a collection board, a communication board and a power board.

[0028] Specifically, the first microcontroller, the first communication module, the total power supply adjustment circuit and the storage unit are integrated on the mainboard.

[0029] Specifically, the second microcontroller and the collection power supply circuit are integrated on the collection board.

[0030] Specifically, the communication power supply circuit, the second communication module and the first isolation chip are integrated on the communication board.

[0031] Specifically, the AC-DC power module, the power relay and the logic optocoupler are integrated on the power board.

[0032] The first communication module and the second communication module are both RS485 communication modules.

[0033] The input 220V alternating voltage is converted into 24V direct current voltage by the AC-DC power module on the power board, and then the 24V direct current voltage is used to supply power to the chips at all levels. This decentralized power management mode of independently integrating power supply adjustment modules on each board card reduces the power supply interference between the boards and improves the electromagnetic compatibility of the system. The power supply scheme can be selected according to the needs of different board cards. If a new function board is added, the total power supply does not need to be modified, and the local power supply demand can be directly adapted, which has high flexibility and expandability. In addition, the single-board power failure does not affect other board cards, and this power supply design improves the stability and reliability of the system.

[0034] Specifically, the first microcontroller communicates with the second microcontroller through the first communication module. The second microcontroller is connected to the third isolation chip, the third isolation chip is connected to the analog switch, the analog switch is connected to the solid-state relay, the solid-state relay is connected to the operational amplifier, the operational amplifier is connected to the ADC chip, the ADC chip is connected to the second isolation chip, and the second isolation chip is connected to the second microcontroller.

[0035] The dual-isolation architecture prevents high voltage from entering the control terminal and ensures the system's anti-interference capability, especially in circuits involving a mixture of analog and digital signals.

[0036] The coordinated control of solid-state relays and analog switches can reduce the impact of contact bounce on ADC chips.

[0037] Operational amplifiers perform impedance matching or amplification on the output signal of solid-state relays. This pre-conditioning setting improves sampling accuracy.

[0038] In signal acquisition scenarios, it is usually necessary to acquire signals from multiple different sources. The first microcontroller sends instructions to the second microcontroller, which controls the analog switch to select the target channel. The solid-state relay connects the sensor power supply circuit, the operational amplifier amplifies the signal and then the ADC converts it. The digital signal is returned to the second microcontroller through the isolation chip, and the data is packaged and transmitted back via RS485.

[0039] Specifically, the operational amplifier and the ADC chip are each connected to a reference source. The reference source provides an accurate reference voltage for the operational amplifier, ensuring the accuracy and stability of its output signal. The reference source also provides an accurate reference voltage for the ADC chip, ensuring that the ADC chip converts the input analog signal into the corresponding digital signal according to accurate quantization standards. This guarantees the stability and reliability of the entire signal acquisition system. Furthermore, sharing the reference source settings avoids systematic errors caused by reference drift.

[0040] Specifically, the storage unit includes a non-volatile storage medium and an SDRAM cache, and the non-volatile storage medium includes a NOR-FLASH, an EEPROM, and an eMMC. The NOR-FLASH is used to store running parameters; the EEPROM is used to store control programs and related configuration parameters; and the eMMC is used to store collected industrial field data according to a time stamp. By using the characteristics of fast random reading and directly executable code of the NOR-FLASH, the paperless recorder can quickly access the running parameters and quickly respond, thereby ensuring stable operation of the equipment. The EEPROM stores control programs and related configuration parameters, and the data is not lost during power failure, so that the data security is high, the paperless recorder can accurately restore the working state after power failure, and the stability and maintainability of the system are enhanced. The eMMC facilitates orderly organization, efficient storage, and fast retrieval of a large amount of historical data, so as to meet the requirements of industrial production on data real-time and high efficiency, and also facilitate long-term monitoring and traceability analysis of the industrial production process.

[0041] The different types of data or files are divided into regions for storage. This storage mode optimizes the data management function and enhances the system stability by reasonably matching different storage media, and can better meet the complex requirements of industrial field data storage and processing.

[0042] Specifically, the first microcontroller is connected with the first isolation chip through a serial port, the first isolation chip is connected with the second communication module, and the second communication module is used for communication with the host computer. The host computer receives the data collected by the paperless recorder in real time, and classifies, backs up, and stores the data. The collected data is displayed on the host computer in an intuitive manner, such as displaying the change trend of temperature, pressure, flow, and other parameters in the form of graphics, curves, tables, etc., so that the user can understand the production process or the state of the equipment operation at any time, and further process and analyze the data uploaded by the paperless recorder. The user can also configure various parameters of the paperless recorder through the host computer.

[0043] Specifically, the first microcontroller is connected with the logic optocoupler, and the logic optocoupler is connected with the power relay, which is used to realize accurate control of external high-power equipment.

[0044] Specifically, the first microcontroller is connected with the high-speed USB chip through the USB2.0 ULPI interface, and the high-speed USB chip is connected with the USB interface, which is used for high-speed and reliable data communication between the external USB device. Various USB peripherals can be easily connected, thereby expanding the function and application range.

[0045] Specifically, the first microcontroller is connected with a touch screen, a button, a first temperature and humidity sensor, and an RTC.

[0046] Specifically, the second microcontroller is connected with a second temperature and humidity sensor, which is used for providing a reference temperature for collecting the temperature signal.

[0047] Specifically, the communication board is further provided with a DC 24V / 5V power distribution output interface, which can provide DC 24V and 5V voltage for external devices.

[0048] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A paperless recorder characterized by, The main board, the acquisition board, the communication board and the power supply board are included. The first microcontroller, the first communication module, the total power supply adjustment circuit and the storage unit are integrated on the main board. The second microcontroller and the acquisition power supply circuit are integrated on the acquisition board. The communication power supply circuit, the second communication module and the first isolation chip are integrated on the communication board. The AC-DC power supply module, the power relay and the logic optocoupler are integrated on the power supply board. The first communication module and the second communication module are RS485 communication modules.

2. A paperless recorder according to claim 1, wherein: The first microcontroller communicates with the second microcontroller through the first communication module. The second microcontroller is connected with the third isolation chip, the third isolation chip is connected with the analog switch, the analog switch is connected with the solid state relay, the solid state relay is connected with the operational amplifier, the operational amplifier is connected with the ADC chip, the ADC chip is connected with the second isolation chip, the second isolation chip is connected with the second microcontroller, and the operational amplifier and the ADC chip are connected with the reference source respectively.

3. A paperless recorder according to claim 1, wherein: The storage unit includes the non-volatile storage medium and the SDRAM cache, and the non-volatile storage medium includes NOR-FLASH, EEPROM and eMMC. The NOR-FLASH is used for storing running parameters. The EEPROM is used for storing control programs and related configuration parameters. The eMMC is used for storing the collected industrial field data according to time stamps.

4. A paperless recorder according to claim 2, wherein: The first microcontroller is connected with the first isolation chip through a serial port, the first isolation chip is connected with the second communication module, and the second communication module is used for communicating with the upper computer.

5. A paperless recorder according to claim 4, wherein: The first microcontroller is connected with the logic optocoupler, the logic optocoupler is connected with the power relay, and the power relay is used for realizing accurate control of external high-power equipment.

6. A paperless recorder according to claim 5, wherein: The first microcontroller is connected with a high-speed USB chip through a USB2.0 ULPI interface, and the high-speed USB chip is connected with a USB interface and is used for high-speed and reliable data communication between the external USB equipment.

7. A paperless recorder according to claim 6, wherein: The first microcontroller is connected with a touch screen, a button, a first temperature and humidity sensor and an RTC.

8. A paperless recorder according to claim 2, wherein: The second microcontroller is connected with a second temperature and humidity sensor and is used for providing a reference temperature for temperature signal collection.

9. A paperless recorder according to claim 1 wherein: The communication board further includes DC24V and DC5V power distribution output interfaces.

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