A WIFI communication circuit of a PCR instrument

Abstract

The utility model discloses a kind of WIFI communication circuit of PCR instrument, belong to medical equipment communication technical field.The circuit aims to provide a kind of wireless communication solution with stable structure, strong anti-interference capability.It includes main control unit for processing data and instruction and WIFI module for wireless data transceiving, and both are connected by serial communication interface.To improve WIFI module operating stability, power filter circuit is set by the first capacitor and the second capacitor of different capacity parallel connection, to effectively filter out power noise.Start-up mode configuration circuit is also provided, and the mode selection pin of WIFI module is fixed at predetermined level by pull-up and pull-down resistance, to ensure that it automatically enters standard operation mode after power-on.The utility model improves the reliability and anti-interference capability of PCR instrument wireless communication by optimizing hardware circuit structure.

Description

Technical Field

[0001] This utility model relates to the field of medical device communication technology, and in particular to a WIFI communication circuit for a PCR instrument. Background Technology

[0002] Polymerase chain reaction (PCR) instruments are key equipment in modern molecular biology research and clinical diagnostics. They amplify specific DNA fragments in vitro and are widely used in gene analysis, pathogen detection, and forensic identification. To control the experimental process and export experimental data, existing PCR instruments are typically equipped with data communication interfaces. Currently, PCR instruments primarily rely on wired interfaces, such as Universal Serial Bus (USB) or Ethernet interfaces, to physically connect to a host computer or data storage device to transmit experimental information such as temperature profiles and fluorescence data.

[0003] However, this traditional wired communication method has revealed a series of problems in practical applications. First, its operational flexibility is severely limited; researchers must be physically present at the equipment site to copy data or set up and monitor experimental procedures via a physical connection, failing to meet the needs of remote operation and real-time monitoring. Second, for PCR experiments that require long-term operation, researchers struggle to obtain real-time status and intermediate data in a timely manner, resulting in poor data acquisition real-time performance. Furthermore, when multiple PCR instruments are running simultaneously in the laboratory, operators need to manually copy data from each instrument individually, which is not only tedious and inefficient but also prone to data corruption or loss due to human error, hindering centralized and automated data management. Therefore, existing PCR instruments, due to their inherent wired communication method, have significant shortcomings in terms of operational convenience, data management efficiency, and intelligent integration, urgently requiring a stable and reliable wireless communication solution that can be integrated into the instrument to solve these technical problems. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of this utility model is to provide a WIFI communication circuit for a PCR instrument in order to solve the above problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A WIFI communication circuit for a PCR instrument, comprising: The WIFI communication circuit of the main control unit PCR instrument is used to process the internal data and control commands of the PCR instrument. The WIFI module of the PCR instrument is used for data transmission and reception between the WIFI communication circuit of the main control unit PCR instrument and an external wireless network. The WIFI communication circuit of the main control unit PCR instrument and the WIFI communication circuit of the WIFI module PCR instrument are connected through a serial communication interface to realize data transmission between the two. A power filtering circuit is connected to the power input terminal of the WIFI communication circuit of the WIFI module PCR instrument; the power filtering circuit includes a first capacitor WIFI communication circuit of the PCR instrument and a second capacitor WIFI communication circuit of the PCR instrument connected in parallel, wherein the capacitance value of the first capacitor WIFI communication circuit of the PCR instrument is greater than the capacitance value of the second capacitor WIFI communication circuit of the PCR instrument. The startup mode configuration circuit is connected to the mode selection pin of the WIFI communication circuit of the WIFI module PCR instrument; the startup mode configuration circuit is used to configure the WIFI communication circuit of the WIFI module PCR instrument to a preset standard operating mode when the WIFI communication circuit is powered on.

[0006] As a preferred embodiment of this utility model, the startup mode configuration circuit includes: a first pull-up resistor WIFI communication circuit of the PCR instrument, connected between the first mode selection pin of the WIFI communication circuit of the PCR instrument and the power supply; and a first pull-down resistor WIFI communication circuit of the PCR instrument, connected between the second mode selection pin of the WIFI communication circuit of the PCR instrument and ground.

[0007] As a preferred embodiment of this utility model, the serial communication interface includes: a first signal path between the serial transmit pin of the WIFI communication circuit of the main control unit PCR instrument and the serial receive pin of the WIFI communication circuit of the WIFI module PCR instrument; and a second signal path between the serial receive pin of the WIFI communication circuit of the main control unit PCR instrument and the serial transmit pin of the WIFI communication circuit of the WIFI module PCR instrument.

[0008] As a preferred embodiment of this utility model, a first current-limiting resistor WIFI communication circuit of a PCR instrument is connected in series in the first signal path, and a second current-limiting resistor WIFI communication circuit of a PCR instrument is connected in series in the second signal path.

[0009] As a preferred embodiment of this utility model, it further includes a control circuit, which includes an enable pin of the WIFI communication circuit of the WIFI module PCR instrument, a second pull-up resistor between the WIFI communication circuit of the PCR instrument and the power supply, and a reset pin of the WIFI communication circuit of the WIFI module PCR instrument, a third pull-up resistor between the WIFI communication circuit of the PCR instrument and the power supply.

[0010] As a preferred embodiment of this invention, the WIFI communication circuit of the first capacitor PCR instrument is a 10uF ceramic capacitor, and the WIFI communication circuit of the second capacitor PCR instrument is a 0.1uF ceramic capacitor.

[0011] As a preferred embodiment of this utility model, it further includes a second power supply filter circuit that supplies power to the WIFI communication circuit of the main control unit PCR instrument. The second power supply filter circuit includes a third capacitor connected between the power supply pin and the ground pin of the WIFI communication circuit of the main control unit PCR instrument.

[0012] By adopting the above technical solution, the beneficial effects of this utility model are as follows: The WIFI communication circuit provided by this invention, through stable and reliable electrical connection and logical configuration between the main control chip and the WIFI module, enables the PCR instrument to possess stable wireless network communication capabilities, thereby freeing it from the physical constraints of traditional wired data transmission methods. This allows operators to remotely monitor the PCR instrument's status and manage experimental procedures in real time using terminal devices such as computers and mobile phones via wireless network, significantly improving the flexibility and convenience of equipment use. Simultaneously, this circuit supports the real-time push of key data generated during the experiment to designated user terminals or cloud servers, ensuring timely data acquisition and providing a technical foundation for centralized data management and automated archiving of multiple instruments, thus improving the overall work efficiency of the laboratory. Furthermore, this invention provides a standardized wireless interface for the PCR instrument to connect to intelligent platforms such as the Laboratory Information Management System (LIMS), promoting the integration of the equipment with the entire laboratory's Internet of Things (IoT) system. Attached Figure Description

[0013] Figure 1 This is a circuit diagram of the WIFI communication circuit of the PCR instrument of this utility model. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0016] Please see Figure 1 This embodiment provides a WIFI communication circuit for a PCR instrument. The core function of this circuit is to establish a data path between the internal main controller of the PCR instrument and an external wireless network. The circuit consists of a main control unit (MCU), a WIFI module, and a series of peripheral components for signal conditioning, power filtering, and mode configuration.

[0017] In one specific implementation, the main control unit U2 uses the STMicroelectronics STM32G030C8T6 chip. This chip is a 32-bit microcontroller based on the ARM Cortex-M0+ core, responsible for executing the core control algorithm of the PCR instrument, data processing, and communication tasks with peripherals. The WIFI module U1 uses the Espressif ESP-12F module, which integrates the ESP8266EX chip as the core processor. It is a highly integrated Wi-Fi SoC with a complete TCP / IP protocol stack and microcontroller unit, capable of independently handling network communication tasks.

[0018] The main control unit U2 and the WIFI module U1 exchange data via a serial communication interface (UART). Specifically, the serial transmit pin PA9 (TX) of the main control unit U2 is connected to the serial receive pin (physical pin 15) of the WIFI module U1 via a 330Ω current-limiting resistor R4. This data flow is used to send experimental data or instructions processed by the MCU to the WIFI module. Conversely, the serial receive pin PA10 (RX) of the main control unit U2 is connected to the serial transmit pin (physical pin 16) of the WIFI module U1 via a 330Ω current-limiting resistor R2. This data flow is used for the MCU to receive remote instructions or data parsed by the WIFI module. Resistors R2 and R4 serve to protect the communication port and enhance signal stability.

[0019] Stable circuit operation relies on reliable power supply design. For the WIFI module U1, due to the significant instantaneous current consumption during wireless signal transmission, the power supply filtering design is particularly critical. In this embodiment, a 10uF ceramic capacitor C2 and a 0.1uF ceramic capacitor C3 are connected in parallel between the power input pin VDD (pin 8) and the ground pin GND (pin 9) of the WIFI module U1. The larger capacitor C2 serves as an energy storage and low-frequency filter, providing instantaneous high current to stabilize the power supply voltage; the smaller capacitor C3 serves as a high-frequency decoupling capacitor, filtering out high-frequency noise interference from the power supply and ensuring the stable performance of the WIFI module's RF circuitry. For the main control unit U2, a 0.1uF decoupling capacitor C1 is connected between its power pin VDD (pin 7) and the ground pin VSS (pin 6). This capacitor should be physically placed as close as possible to the chip pins to effectively filter out power supply noise.

[0020] To ensure that the WIFI module U1 can boot normally and enter the preset working mode after each power-on, this circuit also includes necessary control and mode configuration circuits. The reset pin RST (pin 1) of the WIFI module U1 is connected to the power supply VCC through a 10KΩ pull-up resistor R1, ensuring that this pin is at a high level during power-on and normal operation, thus releasing the module from the reset state. The module's enable pin EN (pin 3) is also connected to the power supply VCC through a 10KΩ pull-up resistor R3. This pin must remain high for the module to function properly. Furthermore, to set the WIFI module U1 to the standard working mode of booting from the internal Flash memory and running user programs, its boot mode selection pin needs to be correctly configured. In this embodiment, the module's GPIO0 pin (pin 12) is connected to VCC through a 10KΩ pull-up resistor R5, while the module's GPIO15 pin (pin 10) is connected to GND through a 10KΩ pull-down resistor R6. When the system is powered on, this level combination (GPIO0 is high and GPIO15 is low) is recognized by the module's internal logic, thus entering the standard operating mode.

[0021] In summary, the workflow of this circuit is as follows: The core operating status and experimental data of the PCR instrument are acquired and processed by the main control unit U2. When wireless data transmission is required, U2 sends data packets to the WIFI module U1 via its UART transmit pin PA9. After receiving the data, U1 encapsulates the data using its built-in TCP / IP protocol stack and transmits it as a WIFI signal to a designated network address (such as a server or mobile app) via its onboard antenna. When an external device sends control commands via WIFI, the command is received and parsed by U1, and then transmitted to the receive pin PA10 of the main control unit U2 via its UART transmit pin. After receiving the command, U2 executes the corresponding control operation, thereby realizing remote control and data interaction of the PCR instrument.

[0022] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A WIFI communication circuit for a PCR instrument, characterized in that, include: The main control unit (U2) is used to process the internal data and control commands of the PCR instrument; The WIFI module (U1) is used for data transmission and reception between the main control unit (U2) and the external wireless network; The main control unit (U2) and the WIFI module (U1) are connected through a serial communication interface to realize data transmission between them; A power filtering circuit is connected to the power input terminal of the WIFI module (U1); the power filtering circuit includes a first capacitor (C2) and a second capacitor (C3) connected in parallel, wherein the capacitance value of the first capacitor (C2) is greater than the capacitance value of the second capacitor (C3). A startup mode configuration circuit is connected to the mode selection pin of the WIFI module (U1); the startup mode configuration circuit is used to configure the WIFI module (U1) to a preset standard operating mode when the WIFI module (U1) is powered on.

2. The WIFI communication circuit of the PCR instrument according to claim 1, characterized in that, The startup mode configuration circuit includes: a first pull-up resistor (R5) connected between the first mode selection pin (GPIO0) of the WIFI module (U1) and the power supply; and a first pull-down resistor (R6) connected between the second mode selection pin (GPIO15) of the WIFI module (U1) and ground.

3. The WIFI communication circuit of the PCR instrument according to claim 1, characterized in that, The serial communication interface includes: a first signal path connected between the serial transmit pin of the main control unit (U2) and the serial receive pin of the WIFI module (U1); and a second signal path connected between the serial receive pin of the main control unit (U2) and the serial transmit pin of the WIFI module (U1).

4. The WIFI communication circuit of the PCR instrument according to claim 3, characterized in that, A first current-limiting resistor (R4) is connected in series in the first signal path, and a second current-limiting resistor (R2) is connected in series in the second signal path.

5. The WIFI communication circuit of the PCR instrument according to claim 1, characterized in that, It also includes a control circuit, which includes a second pull-up resistor (R3) connected between the enable pin (EN) of the WIFI module (U1) and the power supply, and a third pull-up resistor (R1) connected between the reset pin (RST) of the WIFI module (U1) and the power supply.

6. The WIFI communication circuit of the PCR instrument according to claim 1, characterized in that, The first capacitor (C2) is a 10uF ceramic capacitor, and the second capacitor (C3) is a 0.1uF ceramic capacitor.

7. The WIFI communication circuit of the PCR instrument according to claim 1, characterized in that, It also includes a second power supply filter circuit that supplies power to the main control unit (U2), the second power supply filter circuit including a third capacitor (C1) connected between the power supply pin and the ground pin of the main control unit (U2).

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