WO2021129375A1 - Synchronous data acquisition device powered by single power supply and acquisition method thereof - Google Patents

Synchronous data acquisition device powered by single power supply and acquisition method thereof Download PDF

Info

Publication number
WO2021129375A1
WO2021129375A1 PCT/CN2020/134491 CN2020134491W WO2021129375A1 WO 2021129375 A1 WO2021129375 A1 WO 2021129375A1 CN 2020134491 W CN2020134491 W CN 2020134491W WO 2021129375 A1 WO2021129375 A1 WO 2021129375A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
single power
supply
signal
fully differential
Prior art date
Application number
PCT/CN2020/134491
Other languages
French (fr)
Chinese (zh)
Inventor
王辅宋
刘付鹏
金亮
刘文峰
谢镇
刘国勇
黄斌斌
Original Assignee
江西飞尚科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江西飞尚科技有限公司 filed Critical 江西飞尚科技有限公司
Publication of WO2021129375A1 publication Critical patent/WO2021129375A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2612—Data acquisition interface

Definitions

  • the invention relates to a synchronous data collection device powered by a single power supply and a collection method thereof, belonging to the field of civil engineering and applied to the structural safety and health monitoring industry.
  • the current multi-channel synchronous vibration data acquisition instrument on the market has high power consumption and large volume, and some even need to add a cooling fan or a large-volume radiator to meet the thermal design requirements of the system.
  • the main reason for high power consumption and large equipment volume is that the signal chain conditioning circuit design of the entire system still adopts the traditional dual power supply design.
  • dual power supplies have their advantages, such as the best performance and large dynamic range of operational amplifiers, But the sacrifice is the system power consumption, volume and cost.
  • more and more operational amplifiers, instrumentation amplifiers, and differential amplifiers that support single power supply can have performance comparable to dual power supply chips and fully meet the performance requirements of the system.
  • Another problem caused by the high power consumption of the equipment is that if the equipment is used outdoors, it needs to consider the mains power supply. In the case of inconvenient power supply, it also limits the application range of the equipment.
  • the present invention aims to provide a synchronous data acquisition device powered by a single power supply and an acquisition method thereof, so as to solve the problem of high power consumption and large size of the current synchronous data acquisition equipment, which leads to complex power supply design and circuit design of the system.
  • the structure is huge, and the equipment cannot work for a long time in an environment without electricity.
  • a synchronous data acquisition device powered by a single power supply which includes a BNC interface, a single power supply fully differential amplifier, a single power supply instrumentation amplifier, a single power supply anti-aliasing filter, an analog-to-digital converter, a processor, an Ethernet interface, and power management Module
  • the processor is respectively connected to the analog-to-digital converter and the Ethernet interface;
  • the BNC interface is connected to the input end of the single-supply fully differential amplifier, the output end of the single-supply fully differential amplifier is connected to the input end of the single-supply instrumentation amplifier,
  • the output end of the power supply instrumentation amplifier is connected to the input end of the single-supply anti-aliasing filter, and the output end of the single-supply anti-aliasing filter is connected to the input end of the analog-to-digital converter.
  • a BNC interface a single-supply fully differential amplifier, a single-supply instrumentation amplifier, a single-supply anti-aliasing filter, and an analog-to-digital converter constitute a set of units, and the number of the units is one or more.
  • the processor is a Cortex-A8 processor.
  • An acquisition method for a single-power-supply synchronous data acquisition device a single-power fully differential amplifier converts bipolar signals into unipolar differential signals and amplifies them through a single-power instrumentation amplifier, and then through a single-power anti-aliasing filter The filter process is performed by the integrated signal chain, and the processing circuit of the integrated signal chain adopts a single power supply mode to realize the conditioning of the bipolar signal.
  • the single-supply fully differential amplifier converts the external bipolar single-ended signal into a unipolar fully differential output signal.
  • the single-supply instrumentation amplifier amplifies the unipolar differential signal.
  • the single power supply anti-aliasing filter filters the unipolar signal.
  • the design of the acquisition device mainly includes single power supply fully differential amplifier circuit, single power supply instrumentation amplifier circuit, single power supply anti-aliasing filter circuit, analog-to-digital converter, Cortex-A8 processor, Ethernet interface,
  • the power management module is composed.
  • the first-stage single-supply fully differential amplifier circuit is configured to convert from single-ended to fully-differential.
  • the fully-differential amplifier selects a single-supply power supply and track-rail output chip that is currently in the market for mature applications.
  • the fully differential amplifier can work normally with a positive power supply.
  • the input signal Vin is a bipolar signal, such as ⁇ 10V.
  • the signals are jointly superimposed on a common mode voltage Vocm, so that the front end of the system converts the bipolar input signal into a unipolar differential signal through a single power supply conditioning circuit, thereby realizing a single power supply for the back-end circuit Conditioning is ready for preliminary signal conditioning.
  • the design point of the first-stage fully differential amplifier is that the voltage at the non-inverting input terminal and the inverting input terminal of the fully differential amplifier cannot exceed the power rail or lower than 0V and exceed the power supply voltage by 5V.
  • the non-inverting input terminal voltage of the fully differential amplifier is Vp
  • the inverting input terminal voltage is Vn
  • the forward output voltage of the fully differential amplifier is set to Vout+
  • the inverting output voltage is Vout-.
  • the main function of the single-supply anti-aliasing filter circuit is to filter out interference and reduce noise.
  • the anti-aliasing filter is designed with a single-supply operational amplifier. Since the signal has been processed into a unipolar differential signal in the pre-stage signal chain, And the common-mode voltage is 2.5V, which is in the middle of the 5V power supply of the good signal chain, so this part of the circuit only needs to select a single-supply operational amplifier.
  • the main function of the analog-to-digital converter is to convert the signal processed by the signal chain into a digital signal.
  • the Cortex-A8 processor is mainly responsible for the logic control of the analog-to-digital converter and the external data communication.
  • the Ethernet interface is mainly responsible for sending the data packaged by the Cortex-A8 processor to the external server.
  • the power management module is mainly responsible for providing constant voltage power to the analog and digital parts of the entire system.
  • the patent of the present invention adopts a signal chain design of a single power supply, and the power supply of the digital circuit is originally a single power supply, so the power supply design of the entire system is greatly simplified, and there is no need to use a large volume and large ripple noise DC-DC conversion At the same time, the power consumption and volume of the whole machine are reduced; due to the chip design of single power supply, the heat generation of the whole machine is also greatly reduced, and the electrical noise level is also greatly reduced, so that the signal-to-noise ratio of the system is also improved to a certain extent. The performance of power-powered equipment will also be improved.
  • Figure 1 is a structural block diagram of the present invention
  • Figure 2 is a circuit diagram of the single power supply fully differential amplifier of the present invention
  • Figure 3 is a single power supply instrumentation amplifier circuit of the present invention.
  • Figure 4 is a single power supply anti-aliasing filter circuit of the present invention.
  • a synchronous data acquisition device powered by a single power supply which includes a BNC interface 1, a single power supply fully differential amplifier 2, a single power supply instrumentation amplifier 3, a single power supply anti-aliasing filter 4, an analog-to-digital converter 5, a processor 6, a Ethernet interface 7 and power management module 8;
  • the processor 6 is connected to the analog-to-digital converter 5 and the Ethernet interface 7 respectively; the BNC interface 1 is connected to the input end of the single-supply fully differential amplifier 2 and the output end of the single-supply fully differential amplifier 2 is connected to the single-supply instrumentation amplifier 3 is connected to the input end, the output end of the single-supply instrumentation amplifier 3 is connected to the input end of the single-supply anti-aliasing filter 4, and the output end of the single-supply anti-aliasing filter 4 is connected to the input end of the analog-to-digital converter 5.
  • the BNC interface 1, the single-supply fully differential amplifier 2, the single-supply instrumentation amplifier 3, the single-supply anti-aliasing filter 4, and the analog-to-digital converter 5 constitute a group of units, and the number of the units is one or more.
  • the processor 6 is a Cortex-A8 processor.
  • a collection method for a synchronous data collection device powered by a single power supply which is characterized in that: a single power supply fully differential amplifier 2 converts a bipolar signal into a unipolar differential signal and amplifies it through a single power supply instrument amplifier 3, and then passes The single power supply anti-aliasing filter 4 performs filtering processing, and the processing circuits of the integrated signal chain all adopt a single power supply mode to realize the conditioning of bipolar signals.
  • the single-supply fully differential amplifier 2 converts the external bipolar single-ended signal into a unipolar fully differential output signal.
  • the single-supply instrumentation amplifier 3 amplifies the unipolar differential signal.
  • the single power supply anti-aliasing filter 4 filters the unipolar signal.
  • the design of the acquisition device mainly includes single power supply fully differential amplifier circuit, single power supply instrumentation amplifier circuit, single power supply anti-aliasing filter circuit, analog-to-digital converter, Cortex-A8 processor, Ethernet interface,
  • the power management module is composed.
  • the first-stage single-supply fully differential amplifier circuit is configured to convert from single-ended to fully-differential.
  • the fully-differential amplifier selects chips with single power supply and rail-rail output that are currently on the market.
  • the fully differential amplifier can work normally with a positive power supply.
  • the input signal Vin is a bipolar signal, such as ⁇ 10V.
  • the signals are jointly superimposed on a common mode voltage Vocm, so that the front end of the system converts the bipolar input signal into a unipolar differential signal through a single power supply conditioning circuit, thereby realizing a single power supply for the back-end circuit Conditioning is ready for preliminary signal conditioning.
  • the design point of the first-stage fully differential amplifier is that the voltage at the non-inverting input terminal and the inverting input terminal of the fully differential amplifier cannot exceed the power rail or lower than 0V and exceed the power supply voltage by 5V.
  • the non-inverting input voltage of the fully differential amplifier is Vp
  • the inverting input voltage is Vn
  • the forward output voltage of the fully differential amplifier is set to Vout+
  • the inverted output voltage is Vout-.
  • the main function of the single-supply anti-aliasing filter circuit is to filter out interference and reduce noise.
  • the anti-aliasing filter is designed with a single-supply operational amplifier. Since the signal has been processed into a unipolar differential signal in the pre-stage signal chain, And the common-mode voltage is 2.5V, which is in the middle of the 5V power supply of the good signal chain, so this part of the circuit only needs to select a single-supply operational amplifier.
  • the main function of the analog-to-digital converter is to convert the signal processed by the signal chain into a digital signal.
  • the Cortex-A8 processor is mainly responsible for the logic control of the analog-to-digital converter and the external data communication.
  • the Ethernet interface is mainly responsible for sending the data packaged by the Cortex-A8 processor to the external server.
  • the power management module is mainly responsible for providing constant voltage power to the analog and digital parts of the entire system.

Abstract

A synchronous data acquisition device powered by a single power supply and an acquisition method thereof. The acquisition device comprises a BNC interface (1), a single-power supply fully differential amplifier (2), a single-power supply instrumentation amplifier (3), a single-power supply anti-aliasing filter (4), an analog-to-digital converter (5), a processor (6), an Ethernet interface (7), and a power management module (8). The use of a single-power supply signal chain design reduces the power consumption and the size of the whole device, while greatly lowering the electrical noise level, so that the signal-to-noise ratio of a system is also improved to a certain extent, and the performance is also improved compared with devices powered by dual power supplies.

Description

一种单电源供电的同步数据采集装置及其采集方法Synchronous data acquisition device powered by a single power supply and its acquisition method 技术领域Technical field
本发明涉及一种单电源供电的同步数据采集装置及其采集方法，属于土木工程领域，应用于结构安全健康监测行业。The invention relates to a synchronous data collection device powered by a single power supply and a collection method thereof, belonging to the field of civil engineering and applied to the structural safety and health monitoring industry.
背景技术Background technique
现有技术：目前市场上的多通道同步振动数据采集仪功耗高、体积大，有的甚至需要增加散热风扇或者大体积散热器才能满足系统的热设计要求。功耗高、设备体积大的主要原因是整个系统的信号链调理电路设计还是采用传统的双电源供电设计，虽然双电源有其的优势，比如能够发挥运算放大器的最佳性能、动态范围大，但是牺牲的是系统功耗、体积和成本。随着目前半导体技术的发展，越来越多的支持单电源供电的运算放大器、仪表放大器、差动放大器的性能也能够与双电源的芯片媲美，完全满足系统的性能要求。设备的功耗高带来的另一个问题就是设备如果在户外使用，就需要考虑市电供电，在供电不方便的场合下，也限制了设备的应用范围。Existing technology: The current multi-channel synchronous vibration data acquisition instrument on the market has high power consumption and large volume, and some even need to add a cooling fan or a large-volume radiator to meet the thermal design requirements of the system. The main reason for high power consumption and large equipment volume is that the signal chain conditioning circuit design of the entire system still adopts the traditional dual power supply design. Although dual power supplies have their advantages, such as the best performance and large dynamic range of operational amplifiers, But the sacrifice is the system power consumption, volume and cost. With the current development of semiconductor technology, more and more operational amplifiers, instrumentation amplifiers, and differential amplifiers that support single power supply can have performance comparable to dual power supply chips and fully meet the performance requirements of the system. Another problem caused by the high power consumption of the equipment is that if the equipment is used outdoors, it needs to consider the mains power supply. In the case of inconvenient power supply, it also limits the application range of the equipment.
发明内容Summary of the invention
本发明针对上述的问题，其目的在于提供一种单电源供电的同步数据采集装置及其采集方法，从而解决目前同步数据采集设备功耗高、体积大、从而带来系统的电源设计复杂、电路结构庞大，设备无法在没有市电的环境长期工作等一系列问题。In view of the above-mentioned problems, the present invention aims to provide a synchronous data acquisition device powered by a single power supply and an acquisition method thereof, so as to solve the problem of high power consumption and large size of the current synchronous data acquisition equipment, which leads to complex power supply design and circuit design of the system. The structure is huge, and the equipment cannot work for a long time in an environment without electricity.
本发明为了实现上述目的，采用如下技术方案：In order to achieve the above objective, the present invention adopts the following technical solutions:
一种单电源供电的同步数据采集装置，它包括BNC接口、单电源全差动放大器、单电源仪表放大器、单电源抗混叠滤波器、模数转换器、处理器、以太网接口和电源管理模块；A synchronous data acquisition device powered by a single power supply, which includes a BNC interface, a single power supply fully differential amplifier, a single power supply instrumentation amplifier, a single power supply anti-aliasing filter, an analog-to-digital converter, a processor, an Ethernet interface, and power management Module
所述处理器分别与模数转换器和以太网接口连接；BNC接口与单电源全差动放大器的输入端连接，单电源全差动放大器的输出端与单电源仪表放大器的输入端连接，单电源仪表放大器的输出端与单电源抗混叠滤波器的输入端连接，单电源抗混叠滤波器的输出端与模数转换器的输入端连接。The processor is respectively connected to the analog-to-digital converter and the Ethernet interface; the BNC interface is connected to the input end of the single-supply fully differential amplifier, the output end of the single-supply fully differential amplifier is connected to the input end of the single-supply instrumentation amplifier, The output end of the power supply instrumentation amplifier is connected to the input end of the single-supply anti-aliasing filter, and the output end of the single-supply anti-aliasing filter is connected to the input end of the analog-to-digital converter.
进一步的，BNC接口、单电源全差动放大器、单电源仪表放大器、单电源抗混叠滤波器和模数转换器构成一组单元，该单元的数量为一个或者一个以上。Further, a BNC interface, a single-supply fully differential amplifier, a single-supply instrumentation amplifier, a single-supply anti-aliasing filter, and an analog-to-digital converter constitute a set of units, and the number of the units is one or more.
进一步的，所述处理器为Cortex-A8处理器。Further, the processor is a Cortex-A8 processor.
一种单电源供电的同步数据采集装置的采集方法：单电源全差动放大器将双极性信号转换成单极性差分信号并通过单电源仪表放大器进行放大处理，再通过单电源抗混叠滤波器进行滤波处理，整合信号链的处理电路全部采用单电源的方式，实现对双极性信号的调理。An acquisition method for a single-power-supply synchronous data acquisition device: a single-power fully differential amplifier converts bipolar signals into unipolar differential signals and amplifies them through a single-power instrumentation amplifier, and then through a single-power anti-aliasing filter The filter process is performed by the integrated signal chain, and the processing circuit of the integrated signal chain adopts a single power supply mode to realize the conditioning of the bipolar signal.
进一步的，单电源全差动放大器将外部双极性的单端信号转换成单极性的全差分输出信号。Further, the single-supply fully differential amplifier converts the external bipolar single-ended signal into a unipolar fully differential output signal.
进一步的，单电源仪表放大器对单极性差分信号进行放大。Further, the single-supply instrumentation amplifier amplifies the unipolar differential signal.
进一步的，单电源抗混叠滤波器对单极性信号进行滤波器。Further, the single power supply anti-aliasing filter filters the unipolar signal.
本发明的原理介绍:本采集装置设计主要有单电源全差动放大器电路、单电源仪表放大器电路、单电源抗混叠滤波器电路、模数转换器、Cortex-A8处理器、以太网接口、电源管理模块组成。Introduction to the principle of the present invention: The design of the acquisition device mainly includes single power supply fully differential amplifier circuit, single power supply instrumentation amplifier circuit, single power supply anti-aliasing filter circuit, analog-to-digital converter, Cortex-A8 processor, Ethernet interface, The power management module is composed.
(1)第一级的单电源全差动放大器电路配置成单端转全差分的方式，全差动放大器选择目前 市面上成熟应用的单电源供电、轨道轨输出的芯片。全差动放大器使用一个正电源即可正常工作。一般输入信号Vin都是双极性信号，比如±10V，通过将全差动放大器的共模电压引脚配置一个共模电压，使得单端双极性信号通过全差动放大器后输出的全差分信号被共同被叠加在一个共模电压Vocm上，这样就实现了系统最前端将双极性的输入信号通过单电源的调理电路转换成单极性的差分信号，从而为后端电路实现单电源调理做好了初步信号调理准备。(1) The first-stage single-supply fully differential amplifier circuit is configured to convert from single-ended to fully-differential. The fully-differential amplifier selects a single-supply power supply and track-rail output chip that is currently in the market for mature applications. The fully differential amplifier can work normally with a positive power supply. Generally, the input signal Vin is a bipolar signal, such as ±10V. By configuring the common mode voltage pin of the fully differential amplifier with a common mode voltage, the single-ended bipolar signal is fully differential after passing through the fully differential amplifier. The signals are jointly superimposed on a common mode voltage Vocm, so that the front end of the system converts the bipolar input signal into a unipolar differential signal through a single power supply conditioning circuit, thereby realizing a single power supply for the back-end circuit Conditioning is ready for preliminary signal conditioning.
第一级全差动放大器的设计要点是要求全差动放大器的同相输入端和反相输入端的电压不能超过电源轨或者说低于0V和超过电源电压5V。设全差动放大器的同相输入端电压为Vp，反相输入端电压为Vn；同时设全差动放大器的正向输出电压为Vout+，反相输出电压为Vout-。The design point of the first-stage fully differential amplifier is that the voltage at the non-inverting input terminal and the inverting input terminal of the fully differential amplifier cannot exceed the power rail or lower than 0V and exceed the power supply voltage by 5V. Suppose the non-inverting input terminal voltage of the fully differential amplifier is Vp, and the inverting input terminal voltage is Vn; at the same time, the forward output voltage of the fully differential amplifier is set to Vout+, and the inverting output voltage is Vout-.
根据全差动放大器的特性，分别列出全差动放大器的输出电压和求和点(Vp、Vn)的方程：According to the characteristics of the fully differential amplifier, the equations of the output voltage and the summing point (Vp, Vn) of the fully differential amplifier are listed separately:
Figure PCTCN2020134491-appb-000001
Figure PCTCN2020134491-appb-000001
Figure PCTCN2020134491-appb-000002
Figure PCTCN2020134491-appb-000002
Figure PCTCN2020134491-appb-000003
Figure PCTCN2020134491-appb-000003
Figure PCTCN2020134491-appb-000004
Figure PCTCN2020134491-appb-000004
设输入电压范围为±10V，R1＝R3＝1K欧姆，R2＝R4＝250欧姆，Vocm＝2.5V则可求出：Suppose the input voltage range is ±10V, R1=R3=1K ohm, R2=R4=250 ohm, Vocm=2.5V, then it can be obtained:
当Vin＝10V时，Vout+＝3.75V，Vout-＝1.25V；When Vin=10V, Vout+=3.75V, Vout-=1.25V;
当Vin＝-10V时，Vout+＝1.25V，Vout-＝3.75V；When Vin=-10V, Vout+=1.25V, Vout-=3.75V;
当Vin＝-10V时，Vp＝1V，Vn＝1V。When Vin=-10V, Vp=1V and Vn=1V.
根据以上结果，在输入信号电压在-10极限时，Vp和Vn均大于0V，满足系统设计要求。According to the above results, when the input signal voltage is at the -10 limit, both Vp and Vn are greater than 0V, which meets the system design requirements.
(2)单电源仪表放大器电路，主要作用是将第一级信号进行放大，提高信号的信噪比。仪表放大器也选用单电源供电。因为全差动放大器输出的差分信号共模电压为Vocm＝2.5V，所以仪表放大器的共模电压也设置为2.5V。(2) Single-supply instrumentation amplifier circuit, whose main function is to amplify the first-stage signal and improve the signal-to-noise ratio of the signal. The instrumentation amplifier is also powered by a single power supply. Because the common-mode voltage of the differential signal output by the fully differential amplifier is Vocm=2.5V, the common-mode voltage of the instrumentation amplifier is also set to 2.5V.
(3)单电源抗混叠滤波器电路主要作用是滤除干扰和降低噪声，抗混叠滤波器的设计采用单电源运算放大器，由于信号已经在前级信号链处理成单极性差分信号，而且共模电压为2.5V，正在好信号链供电电源5V的正中间，所以该部分电路只需要选择单电源运放即可。(3) The main function of the single-supply anti-aliasing filter circuit is to filter out interference and reduce noise. The anti-aliasing filter is designed with a single-supply operational amplifier. Since the signal has been processed into a unipolar differential signal in the pre-stage signal chain, And the common-mode voltage is 2.5V, which is in the middle of the 5V power supply of the good signal chain, so this part of the circuit only needs to select a single-supply operational amplifier.
(4)模数转换器的主要作用是将信号链处理完成的信号转换成数字信号。(4) The main function of the analog-to-digital converter is to convert the signal processed by the signal chain into a digital signal.
(5)Cortex-A8处理器主要负责对模数转换器的逻辑控制以及对外部的数据通信。(5) The Cortex-A8 processor is mainly responsible for the logic control of the analog-to-digital converter and the external data communication.
(6)以太网接口主要负责将Cortex-A8处理器打包完成的数据发送给外部服务器。(6) The Ethernet interface is mainly responsible for sending the data packaged by the Cortex-A8 processor to the external server.
(7)电源管理模块主要负责对整个系统的模拟部分和数字部分提供恒定的电压电源。(7) The power management module is mainly responsible for providing constant voltage power to the analog and digital parts of the entire system.
本发明的有益效果：The beneficial effects of the present invention:
本发明专利通过采用单电源的信号链设计，而且数字部分电路的电源原本也都是单电源供电，这样整个系统的电源设计也大大简化，不用采用体积大而且纹波噪声大的DC-DC转换器，同时降低了功耗和整机体积；由于采用单电源的芯片设计，整机的发热量也大大减少，同时电噪声水平也大大降低，使得系统的信噪比也有一定提升，相比双电源供电的设备，性能也会有所提升。The patent of the present invention adopts a signal chain design of a single power supply, and the power supply of the digital circuit is originally a single power supply, so the power supply design of the entire system is greatly simplified, and there is no need to use a large volume and large ripple noise DC-DC conversion At the same time, the power consumption and volume of the whole machine are reduced; due to the chip design of single power supply, the heat generation of the whole machine is also greatly reduced, and the electrical noise level is also greatly reduced, so that the signal-to-noise ratio of the system is also improved to a certain extent. The performance of power-powered equipment will also be improved.
附图说明Description of the drawings
图1为本发明的结构框图；Figure 1 is a structural block diagram of the present invention;
图2为本发明的单电源全差动放大器电路图；Figure 2 is a circuit diagram of the single power supply fully differential amplifier of the present invention;
图3为本发明的单电源仪表放大器电路；Figure 3 is a single power supply instrumentation amplifier circuit of the present invention;
图4为本发明的单电源抗混叠滤波器电路。Figure 4 is a single power supply anti-aliasing filter circuit of the present invention.
具体实施方式Detailed ways
下面结合附图1、2、3、4对本发明进行详细描述：The present invention will be described in detail below in conjunction with accompanying drawings 1, 2, 3, and 4:
一种单电源供电的同步数据采集装置，它包括BNC接口1、单电源全差动放大器2、单电源仪表放大器3、单电源抗混叠滤波器4、模数转换器5、处理器6、以太网接口7和电源管理模块8；A synchronous data acquisition device powered by a single power supply, which includes a BNC interface 1, a single power supply fully differential amplifier 2, a single power supply instrumentation amplifier 3, a single power supply anti-aliasing filter 4, an analog-to-digital converter 5, a processor 6, a Ethernet interface 7 and power management module 8;
所述处理器6分别与模数转换器5和以太网接口7连接；BNC接口1与单电源全差动放大器2的输入端连接，单电源全差动放大器2的输出端与单电源仪表放大器3的输入端连接，单电源仪表放大器3的输出端与单电源抗混叠滤波器4的输入端连接，单电源抗混叠滤波器4的输出端与模数转换器5的输入端连接。The processor 6 is connected to the analog-to-digital converter 5 and the Ethernet interface 7 respectively; the BNC interface 1 is connected to the input end of the single-supply fully differential amplifier 2 and the output end of the single-supply fully differential amplifier 2 is connected to the single-supply instrumentation amplifier 3 is connected to the input end, the output end of the single-supply instrumentation amplifier 3 is connected to the input end of the single-supply anti-aliasing filter 4, and the output end of the single-supply anti-aliasing filter 4 is connected to the input end of the analog-to-digital converter 5.
BNC接口1、单电源全差动放大器2、单电源仪表放大器3、单电源抗混叠滤波器4和模数转换器5构成一组单元，该单元的数量为一个或者一个以上。The BNC interface 1, the single-supply fully differential amplifier 2, the single-supply instrumentation amplifier 3, the single-supply anti-aliasing filter 4, and the analog-to-digital converter 5 constitute a group of units, and the number of the units is one or more.
所述处理器6为Cortex-A8处理器。The processor 6 is a Cortex-A8 processor.
一种单电源供电的同步数据采集装置的采集方法，其特征在于：单电源全差动放大器2将双极性信号转换成单极性差分信号并通过单电源仪表放大器3进行放大处理，再通过单电源抗混叠滤波 器4进行滤波处理，整合信号链的处理电路全部采用单电源的方式，实现对双极性信号的调理。A collection method for a synchronous data collection device powered by a single power supply, which is characterized in that: a single power supply fully differential amplifier 2 converts a bipolar signal into a unipolar differential signal and amplifies it through a single power supply instrument amplifier 3, and then passes The single power supply anti-aliasing filter 4 performs filtering processing, and the processing circuits of the integrated signal chain all adopt a single power supply mode to realize the conditioning of bipolar signals.
单电源全差动放大器2将外部双极性的单端信号转换成单极性的全差分输出信号。The single-supply fully differential amplifier 2 converts the external bipolar single-ended signal into a unipolar fully differential output signal.
单电源仪表放大器3对单极性差分信号进行放大。The single-supply instrumentation amplifier 3 amplifies the unipolar differential signal.
单电源抗混叠滤波器4对单极性信号进行滤波器。The single power supply anti-aliasing filter 4 filters the unipolar signal.
本发明的原理介绍:本采集装置设计主要有单电源全差动放大器电路、单电源仪表放大器电路、单电源抗混叠滤波器电路、模数转换器、Cortex-A8处理器、以太网接口、电源管理模块组成。Introduction to the principle of the present invention: The design of the acquisition device mainly includes single power supply fully differential amplifier circuit, single power supply instrumentation amplifier circuit, single power supply anti-aliasing filter circuit, analog-to-digital converter, Cortex-A8 processor, Ethernet interface, The power management module is composed.
(1)第一级的单电源全差动放大器电路配置成单端转全差分的方式，全差动放大器选择目前市面上成熟应用的单电源供电、轨道轨输出的芯片。全差动放大器使用一个正电源即可正常工作。一般输入信号Vin都是双极性信号，比如±10V，通过将全差动放大器的共模电压引脚配置一个共模电压，使得单端双极性信号通过全差动放大器后输出的全差分信号被共同被叠加在一个共模电压Vocm上，这样就实现了系统最前端将双极性的输入信号通过单电源的调理电路转换成单极性的差分信号，从而为后端电路实现单电源调理做好了初步信号调理准备。(1) The first-stage single-supply fully differential amplifier circuit is configured to convert from single-ended to fully-differential. The fully-differential amplifier selects chips with single power supply and rail-rail output that are currently on the market. The fully differential amplifier can work normally with a positive power supply. Generally, the input signal Vin is a bipolar signal, such as ±10V. By configuring the common mode voltage pin of the fully differential amplifier with a common mode voltage, the single-ended bipolar signal is fully differential after passing through the fully differential amplifier. The signals are jointly superimposed on a common mode voltage Vocm, so that the front end of the system converts the bipolar input signal into a unipolar differential signal through a single power supply conditioning circuit, thereby realizing a single power supply for the back-end circuit Conditioning is ready for preliminary signal conditioning.
第一级全差动放大器的设计要点是要求全差动放大器的同相输入端和反相输入端的电压不能超过电源轨或者说低于0V和超过电源电压5V。参考图2所示电路，设全差动放大器的同相输入端电压为Vp，反相输入端电压为Vn；同时设全差动放大器的正向输出电压为Vout+，反相输出电压为Vout-。The design point of the first-stage fully differential amplifier is that the voltage at the non-inverting input terminal and the inverting input terminal of the fully differential amplifier cannot exceed the power rail or lower than 0V and exceed the power supply voltage by 5V. Referring to the circuit shown in Figure 2, suppose the non-inverting input voltage of the fully differential amplifier is Vp, and the inverting input voltage is Vn; at the same time, the forward output voltage of the fully differential amplifier is set to Vout+, and the inverted output voltage is Vout-.
根据全差动放大器的特性，分别列出全差动放大器的输出电压和求和点(Vp、Vn)的方程：According to the characteristics of the fully differential amplifier, the equations of the output voltage and the summing point (Vp, Vn) of the fully differential amplifier are listed separately:
Figure PCTCN2020134491-appb-000005
Figure PCTCN2020134491-appb-000005
Figure PCTCN2020134491-appb-000006
Figure PCTCN2020134491-appb-000006
Figure PCTCN2020134491-appb-000007
Figure PCTCN2020134491-appb-000007
Figure PCTCN2020134491-appb-000008
Figure PCTCN2020134491-appb-000008
设输入电压范围为±10V，R1＝R3＝1K欧姆，R2＝R4＝250欧姆，Vocm＝2.5V则可求出：Suppose the input voltage range is ±10V, R1=R3=1K ohm, R2=R4=250 ohm, Vocm=2.5V, then it can be obtained:
当Vin＝10V时，Vout+＝3.75V，Vout-＝1.25V；When Vin=10V, Vout+=3.75V, Vout-=1.25V;
当Vin＝-10V时，Vout+＝1.25V，Vout-＝3.75V；When Vin=-10V, Vout+=1.25V, Vout-=3.75V;
当Vin＝-10V时，Vp＝1V，Vn＝1V。When Vin=-10V, Vp=1V and Vn=1V.
根据以上结果，在输入信号电压在-10极限时，Vp和Vn均大于0V，满足系统设计要求。According to the above results, when the input signal voltage is at the -10 limit, both Vp and Vn are greater than 0V, which meets the system design requirements.
(2)单电源仪表放大器电路，主要作用是将第一级信号进行放大，提高信号的信噪比。仪表放大器也选用单电源供电。因为全差动放大器输出的差分信号共模电压为Vocm＝2.5V，所以仪表放大器的共模电压也设置为2.5V，见图3。(2) Single-supply instrumentation amplifier circuit, whose main function is to amplify the first-stage signal and improve the signal-to-noise ratio of the signal. The instrumentation amplifier is also powered by a single power supply. Because the common-mode voltage of the differential signal output by the fully differential amplifier is Vocm=2.5V, the common-mode voltage of the instrumentation amplifier is also set to 2.5V, as shown in Figure 3.
(3)单电源抗混叠滤波器电路主要作用是滤除干扰和降低噪声，抗混叠滤波器的设计采用单电源运算放大器，由于信号已经在前级信号链处理成单极性差分信号，而且共模电压为2.5V，正在好信号链供电电源5V的正中间，所以该部分电路只需要选择单电源运放即可。(3) The main function of the single-supply anti-aliasing filter circuit is to filter out interference and reduce noise. The anti-aliasing filter is designed with a single-supply operational amplifier. Since the signal has been processed into a unipolar differential signal in the pre-stage signal chain, And the common-mode voltage is 2.5V, which is in the middle of the 5V power supply of the good signal chain, so this part of the circuit only needs to select a single-supply operational amplifier.
(4)模数转换器的主要作用是将信号链处理完成的信号转换成数字信号。(4) The main function of the analog-to-digital converter is to convert the signal processed by the signal chain into a digital signal.
(5)Cortex-A8处理器主要负责对模数转换器的逻辑控制以及对外部的数据通信。(5) The Cortex-A8 processor is mainly responsible for the logic control of the analog-to-digital converter and the external data communication.
(6)以太网接口主要负责将Cortex-A8处理器打包完成的数据发送给外部服务器。(6) The Ethernet interface is mainly responsible for sending the data packaged by the Cortex-A8 processor to the external server.
(7)电源管理模块主要负责对整个系统的模拟部分和数字部分提供恒定的电压电源。(7) The power management module is mainly responsible for providing constant voltage power to the analog and digital parts of the entire system.
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

  1. 一种单电源供电的同步数据采集装置，其特征在于：它包括BNC接口(1)、单电源全差动放大器(2)、单电源仪表放大器(3)、单电源抗混叠滤波器(4)、模数转换器(5)、处理器(6)、以太网接口(7)和电源管理模块(8)；A synchronous data acquisition device powered by a single power supply, which is characterized in that it includes a BNC interface (1), a single power supply fully differential amplifier (2), a single power supply instrumentation amplifier (3), and a single power supply anti-aliasing filter (4). ), analog-to-digital converter (5), processor (6), Ethernet interface (7) and power management module (8);
    所述处理器(6)分别与模数转换器(5)和以太网接口(7)连接；BNC接口(1)与单电源全差动放大器(2)的输入端连接，单电源全差动放大器(2)的输出端与单电源仪表放大器(3)的输入端连接，单电源仪表放大器(3)的输出端与单电源抗混叠滤波器(4)的输入端连接，单电源抗混叠滤波器(4)的输出端与模数转换器(5)的输入端连接。The processor (6) is respectively connected to the analog-to-digital converter (5) and the Ethernet interface (7); the BNC interface (1) is connected to the input end of the single power supply fully differential amplifier (2), and the single power supply fully differential The output end of the amplifier (2) is connected to the input end of the single-supply instrumentation amplifier (3), and the output end of the single-supply instrumentation amplifier (3) is connected to the input end of the single-supply anti-aliasing filter (4), and the single-supply anti-aliasing filter The output end of the stacked filter (4) is connected with the input end of the analog-to-digital converter (5).
  2. 根据权利要求1所述的单电源供电的同步数据采集装置，其特征在于：BNC接口(1)、单电源全差动放大器(2)、单电源仪表放大器(3)、单电源抗混叠滤波器(4)和模数转换器(5)构成一组单元，该单元的数量为一个或者一个以上。The single-supply-powered synchronous data acquisition device according to claim 1, characterized in that: BNC interface (1), single-supply fully differential amplifier (2), single-supply instrumentation amplifier (3), single-supply anti-aliasing filter The device (4) and the analog-to-digital converter (5) constitute a group of units, and the number of the units is one or more than one.
  3. 根据权利要求1所述的单电源供电的同步数据采集装置，其特征在于：所述处理器(6)为Cortex-A8处理器。The synchronous data acquisition device powered by a single power supply according to claim 1, wherein the processor (6) is a Cortex-A8 processor.
  4. 一种如权利要求1或2或3的单电源供电的同步数据采集装置的采集方法，其特征在于：单电源全差动放大器(2)将双极性信号转换成单极性差分信号并通过单电源仪表放大器(3)进行放大处理，再通过单电源抗混叠滤波器(4)进行滤波处理，整合信号链的处理电路全部采用单电源的方式，实现对双极性信号的调理。A method for acquiring a synchronous data acquisition device powered by a single power supply as claimed in claim 1 or 2 or 3, characterized in that: a single power supply fully differential amplifier (2) converts a bipolar signal into a unipolar differential signal and passes it through The single-supply instrumentation amplifier (3) performs amplifying processing, and then passes the single-supply anti-aliasing filter (4) for filtering processing. The processing circuits of the integrated signal chain all adopt a single-supply method to realize the conditioning of bipolar signals.
  5. 根据权利要求4所述的单电源供电的同步数据采集装置的采集方法，其特征在于：单电源全 差动放大器(2)将外部双极性的单端信号转换成单极性的全差分输出信号。The collection method of a synchronous data collection device powered by a single power supply according to claim 4, characterized in that: a single power supply fully differential amplifier (2) converts an external bipolar single-ended signal into a unipolar fully differential output signal.
  6. 根据权利要求4所述的单电源供电的同步数据采集装置的采集方法，其特征在于：单电源仪表放大器(3)对单极性差分信号进行放大。The collection method of a synchronous data collection device powered by a single power supply according to claim 4, wherein the single power supply instrumentation amplifier (3) amplifies the unipolar differential signal.
  7. 根据权利要求4所述的单电源供电的同步数据采集装置的采集方法，其特征在于：单电源抗混叠滤波器(4)对单极性信号进行滤波器。The collection method of a synchronous data collection device powered by a single power supply according to claim 4, wherein the single power supply anti-aliasing filter (4) filters the unipolar signal.
PCT/CN2020/134491 2019-12-26 2020-12-08 Synchronous data acquisition device powered by single power supply and acquisition method thereof WO2021129375A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910756859.8A CN110750057A (en) 2019-12-26 2019-12-26 Single-power-supply synchronous data acquisition device and acquisition method thereof
CN201910756859.8 2019-12-26

Publications (1)

Publication Number Publication Date
WO2021129375A1 true WO2021129375A1 (en) 2021-07-01

Family

ID=69275851

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/134491 WO2021129375A1 (en) 2019-12-26 2020-12-08 Synchronous data acquisition device powered by single power supply and acquisition method thereof

Country Status (2)

Country Link
CN (1) CN110750057A (en)
WO (1) WO2021129375A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110750057A (en) * 2019-12-26 2020-02-04 江西飞尚科技有限公司 Single-power-supply synchronous data acquisition device and acquisition method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101279597A (en) * 2007-12-28 2008-10-08 奇瑞汽车股份有限公司 Single power supply control system for automobile
US20100308907A1 (en) * 2009-06-08 2010-12-09 Edan Instruments, Inc. Type of High-Performance DC Amplification Device for Bioelectrical Signal Collection
CN102607181A (en) * 2012-03-23 2012-07-25 李秀田 True color touch liquid crystal screen water boiler controller
CN103440754A (en) * 2013-08-26 2013-12-11 国家电网公司 Wireless distribution type network data monitoring system
CN103744334A (en) * 2014-01-22 2014-04-23 浪潮电子信息产业股份有限公司 Data acquisition system based on field programmable gate array chip and Ethernet
CN204758803U (en) * 2015-06-24 2015-11-11 西安华舜测量设备有限责任公司 Digital magnetometer based on PC computer
CN110750057A (en) * 2019-12-26 2020-02-04 江西飞尚科技有限公司 Single-power-supply synchronous data acquisition device and acquisition method thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1246678C (en) * 2004-01-16 2006-03-22 湖南科技大学 Digital vibration and impact sensor
CN100521518C (en) * 2004-02-09 2009-07-29 音频专用集成电路公司 Digital microphone
US7323855B2 (en) * 2005-03-31 2008-01-29 Silicon Laboratories Inc. Digital pulse width modulated power supply with variable LSB
CN201465279U (en) * 2009-06-04 2010-05-12 西南科技大学 Wireless multi-channel vibration data synchronous acquisition system supplied with power by battery
CN102252700B (en) * 2011-04-29 2012-08-22 中北大学 Micro-cantilever beam piezoresistive bridge type sensor detecting instrument
CN104104400B (en) * 2014-07-16 2016-06-01 中国人民解放军国防科学技术大学 The spaceborne ADS-B Signal reception machine of highly sensitive
CN104622460B (en) * 2014-12-31 2017-08-08 北京瀚景锦河科技有限公司 A kind of ECG signal harvester
CN104977111B (en) * 2015-07-06 2017-09-05 合肥师范学院 The synchronous oar power acquisition system of low-power consumption multiple wireless based on STM32
CN105117505A (en) * 2015-09-22 2015-12-02 江西飞尚科技有限公司 Eight-channel high-speed synchronous data collecting system and method
CN205785231U (en) * 2016-07-13 2016-12-07 北京七维航测科技股份有限公司 Multi-channel high-accuracy synchronous data collection device
CN107085241B (en) * 2017-05-04 2019-05-14 湖南科技大学 Detection device is used in underground water source detection
CN107806909B (en) * 2017-09-13 2019-10-18 南京农业大学 A kind of impulse type cereal flow transducer signal acquisition and processing apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101279597A (en) * 2007-12-28 2008-10-08 奇瑞汽车股份有限公司 Single power supply control system for automobile
US20100308907A1 (en) * 2009-06-08 2010-12-09 Edan Instruments, Inc. Type of High-Performance DC Amplification Device for Bioelectrical Signal Collection
CN102607181A (en) * 2012-03-23 2012-07-25 李秀田 True color touch liquid crystal screen water boiler controller
CN103440754A (en) * 2013-08-26 2013-12-11 国家电网公司 Wireless distribution type network data monitoring system
CN103744334A (en) * 2014-01-22 2014-04-23 浪潮电子信息产业股份有限公司 Data acquisition system based on field programmable gate array chip and Ethernet
CN204758803U (en) * 2015-06-24 2015-11-11 西安华舜测量设备有限责任公司 Digital magnetometer based on PC computer
CN110750057A (en) * 2019-12-26 2020-02-04 江西飞尚科技有限公司 Single-power-supply synchronous data acquisition device and acquisition method thereof

Also Published As

Publication number Publication date
CN110750057A (en) 2020-02-04

Similar Documents

Publication Publication Date Title
US9083369B2 (en) Split-path data acquisition signal chain
CN102908137A (en) Single-channel ECG (Electrocardiogram) collection chip
WO2021129375A1 (en) Synchronous data acquisition device powered by single power supply and acquisition method thereof
CN208506629U (en) A kind of power supply circuit based on far-end feedback
CN1808285B (en) High-precision analog-to-digital converter based on PGA and control method thereof
WO2019091404A1 (en) Mean current control method, device and system and computer readable storage medium
CN208506122U (en) A kind of bidirectional current sample circuit
CN109342805B (en) High-precision microampere current detection circuit
CN203981773U (en) A kind of signal conditioning circuit of active power filtering controller
CN203800802U (en) Large current detection circuit and power source circuit
CN204258744U (en) Portable low power-consumption high-performance eeg amplifier circuit
CN205427035U (en) High voltage sampling circuit of isolated form
CN110032126A (en) A kind of multichannel strain signal synchronous and method
CN101414807B (en) Signal amplification circuit
CN107219392B (en) Real-time current signal data processing system
CN202583361U (en) Power quality data acquisition circuit
CN204374227U (en) For the signal acquisition circuit of motor speed test
CN104811181A (en) Current-to-voltage conversion circuit with input bias and active power filtering effects and current-to-voltage conversion method
CN201294607Y (en) Debug circuit
CN202663362U (en) Preamplifier for rapid spot size measurement
CN104298149A (en) Self-adaptive range signal collecting circuit of chromatographic instrument
CN204559542U (en) A kind of current-to-voltage converting circuit with inputting biased and active power filtering
CN103869863B (en) Sensor conditioning circuit
CN204313869U (en) A kind of Collection device
CN108226621A (en) A kind of high-precision peak-to-valley value sample circuit

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20908241

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20908241

Country of ref document: EP

Kind code of ref document: A1