WO2017198053A1 - Automatic correction circuit and correction method for multi-channel analog signal data acquisition - Google Patents

Automatic correction circuit and correction method for multi-channel analog signal data acquisition Download PDF

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WO2017198053A1
WO2017198053A1 PCT/CN2017/082119 CN2017082119W WO2017198053A1 WO 2017198053 A1 WO2017198053 A1 WO 2017198053A1 CN 2017082119 W CN2017082119 W CN 2017082119W WO 2017198053 A1 WO2017198053 A1 WO 2017198053A1
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signal
standard
control unit
sensor
electronic switch
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PCT/CN2017/082119
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French (fr)
Chinese (zh)
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侯立功
刘全胜
史荧中
陈天娥
吴伟
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无锡职业技术学院
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    • 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
    • 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
    • G05B2219/25—Pc structure of the system
    • G05B2219/25314—Modular structure, modules

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  • the invention relates to a multi-channel analog signal data acquisition automatic correction circuit and a calibration method, relating to a multi-channel analog signal data acquisition circuit which requires automatic zero calibration and a full scale calibration, and belongs to the field of electronic technology application.
  • the signal amplification unit often has a reference drift problem depending on the application environment.
  • the same type of sensor exists.
  • Signal acquisition the problem of inconsistent data acquisition between different channels under the same measurement conditions, the conventional analog signal data acquisition circuit is shown in Figure 1.
  • An improved multi-channel analog signal data acquisition circuit (see FIG. 2) has been used to share a set of signal amplification units by adding electronic switches, but this method can only be used to collect between different channels.
  • the problem of inconsistent data plays a certain role.
  • the signal amplifying unit still has the problem of reference drift as the application environment changes, and new problems arise: (1) The zero-adjusting potentiometer and the full-scale of the signal amplifying circuit manually adjusted The value potentiometer is difficult to adjust to a certain suitable position to meet a variety of different sensor signal input requirements; (2) the electronic switch frequently switches the sensor signal input of different channels, and the switch disturbance greatly interferes with the millivolt level signal input.
  • Another improved traditional analog signal data acquisition circuit uses an IC manufacturer-specific sensor measurement module instead of a signal amplification unit and an A/D conversion unit to convert the original signal amplification and A/D conversion functions. It is completed by an integrated circuit of a professional manufacturer, and the circuit design is simplified and the stability is ensured. However, there are also problems such as a high price of a dedicated chip, a narrow range of the range, an inability to adapt to multi-channel sensing signal acquisition, and an interference of the electronic switch disturbance to the millivolt level signal.
  • the object of the present invention is to provide an automatic calibration of multi-channel analog signal data acquisition for the above-mentioned deficiencies Positive circuit and calibration method, which can automatically correct the zero reference and full scale reference of each sensor signal in real time according to requirements, avoid manual adjustment instability, solve the problem of inconsistent measurement between different channels, and eliminate the signal amplification unit reference in different environments. The impact of drift.
  • a multi-channel analog signal data acquisition automatic correction circuit is sequentially connected by a signal acquisition circuit, an A/D conversion unit and a control unit; the signal acquisition circuit comprises a signal amplification unit, a standard full-scale signal terminal, a standard zero-signal terminal and an electronic switch.
  • the control unit is connected to the control end of the electronic switch, the signal amplifying unit, the standard full-scale signal end and the standard zero signal end are respectively connected to the input end of the electronic switch; the control unit sends the control information to the electronic switch, and the electronic switch automatically switches and the sensor
  • the signal end, the standard full-scale signal end or the standard zero signal end is connected, and the input end signal is transmitted to the signal amplifying unit; the signal of the sensor signal end is from the sensor; the signal of the standard full-scale signal end and the signal of the standard zero signal end are taken from Circuit standard power signal;
  • the A/D conversion unit is configured to convert an analog signal sent by the signal amplifying unit into a digitized signal
  • the control unit uses a microprocessor and a memory, and the microprocessor collects digitized values of the input signals sent by the A/D conversion unit, and performs processing after analysis and calculation; the memory is used to store various types of measurement and operation data.
  • the microprocessor uses a commercially available embedded microprocessor or microcontroller.
  • the correction method of the multi-channel analog signal data acquisition automatic correction circuit includes two modes, namely, the factory debugging mode and the automatic calibration mode, which are switched by setting in the control unit, and after the control mode setting is completed, the control unit automatically completes the corresponding correction, Manual adjustment intervention is required;
  • the automatic correction mode is the default control mode of the control unit.
  • the control unit automatically corrects the sensor signal acquisition circuit in the following two cases: one is when the control unit is powered off again each time; the other is the time that can be set by the control unit.
  • the parameters determine whether to perform automatic calibration and the cycle in which automatic calibration is performed.
  • the factory debugging mode includes the following steps:
  • the control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
  • the control unit After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one.
  • control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch with the input standard full-scale signal end;
  • the control unit After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel one. Signal reference measurement data, at this time, the control unit completes the factory debugging process of the sensor channel one;
  • the control unit After completing the factory debugging of the sensor channel 1, the control unit starts to execute the factory debugging of the sensor channel 2, and the method is the same as the factory debugging of the sensor channel 1; after the factory debugging is completed, the standard zero signal corresponding to the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
  • the automatic calibration mode includes the following steps:
  • the control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
  • the control unit After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
  • control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard full-scale signal end;
  • control unit After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel 1.
  • Signal reference measurement data
  • the control unit automatically controls the electronic switch of the sensor channel one, so that the input end of the electronic switch is connected with the sensor signal end of the input channel one; at this time, the control unit completes the automatic calibration process of the sensor channel one;
  • the signal amplifying unit of the multi-channel analog signal data acquisition automatic correction circuit of the invention no longer needs the traditional manual zero potentiometer and the manual full-scale potentiometer circuit.
  • the standard full-scale signal can take the circuit standard power signal such as +5V or +3.3V as the reference; the standard zero signal can take the circuit standard power signal such as 0V as the reference.
  • each sensor channel collects and memorizes the respective standard zero signal reference measurement data and the standard full scale signal reference measurement data, which is equivalent to each sensor channel can be independently zeroed and adjusted to full scale. It is not necessary to use a uniform zero adjustment and full scale as in the conventional signal acquisition circuit, effectively avoiding the problem that the same sensor measures inconsistency between different channels;
  • Each sensor channel standard zero signal reference measurement data and standard full-scale signal reference measurement data memorized by the control unit are digitized data after A/D conversion, which is stable and reliable and has high resolution compared with the traditional analog circuit;
  • Figure 1 is a schematic diagram of a conventional analog signal data acquisition circuit
  • FIG. 2 is a schematic diagram of an improved conventional analog signal data acquisition circuit 1;
  • FIG. 3 is a schematic diagram of an improved conventional analog signal data acquisition circuit 2;
  • FIG. 4 is a schematic diagram of an automatic correction circuit for multi-channel analog signal data acquisition according to the present invention.
  • a multi-channel analog signal data acquisition automatic correction circuit is sequentially connected by a signal acquisition circuit, an A/D conversion unit and a control unit;
  • the signal acquisition circuit includes a signal amplification unit, a standard full-scale signal terminal, The standard zero signal end and the electronic switch;
  • the control unit is connected to the control end of the electronic switch, the signal amplifying unit, the standard full scale signal end and the standard zero signal end are respectively connected to the input end of the electronic switch;
  • the control unit sends the control information to the electronic switch
  • the electronic switch automatically switches to the sensor signal terminal, the standard full-scale signal terminal or the standard zero signal terminal, and transmits the input signal to the signal amplifying unit; the signal of the sensor signal end comes from the sensor; the signal of the standard full-scale signal terminal and the standard The signals at the zero signal end are taken from the circuit standard power supply signal;
  • the A/D conversion unit is configured to convert an analog signal sent by the signal amplifying unit into a digitized signal
  • the control unit uses a microprocessor and a memory, and the microprocessor collects digitized values of the input signals sent by the A/D conversion unit, and performs processing after analysis and calculation; the memory is used to store various types of measurement and operation data.
  • the microprocessor uses a commercially available embedded microprocessor or microcontroller.
  • the correction method of the multi-channel analog signal data acquisition automatic correction circuit includes two modes, namely, the factory debugging mode and the automatic calibration mode, which are switched by setting in the control unit, and after the control mode setting is completed, the control unit automatically completes the corresponding correction, Manual adjustment intervention is required;
  • the automatic correction mode is the default control mode of the control unit.
  • the control unit automatically corrects the sensor signal acquisition circuit in the following two cases: one is when the control unit is powered off again each time; the other is the time that can be set by the control unit.
  • the parameters determine whether to perform automatic calibration and the cycle in which automatic calibration is performed.
  • the factory debugging mode includes the following steps:
  • the control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
  • the control unit After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one.
  • control unit automatically controls An electronic switch of the sensor channel 1 connects the input end of the electronic switch to the input standard full-scale signal end;
  • the control unit After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel one. Signal reference measurement data, at this time, the control unit completes the factory debugging process of the sensor channel one;
  • the control unit After completing the factory debugging of the sensor channel 1, the control unit starts to execute the factory debugging of the sensor channel 2, and the method is the same as the factory debugging of the sensor channel 1; after the factory debugging is completed, the standard zero signal corresponding to the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
  • the automatic calibration mode includes the following steps:
  • the control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
  • the control unit After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
  • control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard full-scale signal end;
  • control unit After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel 1.
  • Signal reference measurement data
  • the control unit automatically controls the electronic switch of the sensor channel one, so that the input end of the electronic switch is connected with the sensor signal end of the input channel one; at this time, the control unit completes the automatic calibration process of the sensor channel one;
  • the difference between the factory debugging mode and the automatic calibration mode is that the factory debugging mode is to check whether the circuit can operate normally and whether it can be sold at the factory; the automatic calibration mode is an automatic automatic adjustment of the adaptability of the circuit under different operating environment conditions.
  • the two modes respectively obtain the standard zero signal reference measurement data REFx0 and the standard full scale signal reference measurement data REFx1 of each sensor channel, where x is the number of each sensor channel, which is 1 to n.
  • the standard calculated values VT0 and VT1 corresponding to the zero signal and the full scale signal are known and can be stored in the control unit memory as parameters in advance.
  • the control unit continuously collects the sensor signals of channels 1 to n to obtain real-time measurement data REFx (x is the channel number) of each sensor channel, and the control unit measures data REFx0 according to the standard zero signal reference of each sensor channel.
  • the real-time measured value VTx of each sensor channel is calculated separately from the standard full-scale signal reference measurement data REFx1 and the standard calculated values VT0 and VT1 corresponding to the zero signal and the full scale. Thereby achieving automatic correction and calculation of multi-channel analog signal data acquisition.

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Abstract

Disclosed are an automatic correction circuit and a correction method for multi-channel analog-signal data acquisition; the automatic correction circuit for analog-signal data acquisition consists of a signal acquisition circuit, an A/D conversion unit and a control unit which are connected in sequence; the signal acquisition circuit comprises: a signal amplifying unit, a standard full-scale signal terminal, a standard zero signal terminal and an electronic switch; the control unit is connected to the control end of the electronic switch; the signal amplification unit, the standard full-scale signal terminal and the standard zero signal terminal are respectively connected to an input end of the electronic switch; the control unit transmits control information to the electronic switch; the electronic switch is automatically switched to connect to a signal end of a sensor, the standard full-scale signal terminal or the standard zero signal terminal, and transmits an input end signal to the signal amplifying unit; signals at the signal end of the sensor are from the sensor, signals at the standard full-scale signal terminal and signals at the standard zero signal terminal are taken from signals of a standard power supply of the circuit.

Description

一种多路模拟信号数据采集自动校正电路和校正方法Multi-channel analog signal data acquisition automatic correction circuit and correction method 技术领域Technical field
本发明一种多路模拟信号数据采集自动校正电路和校正方法，涉及一种需要自动校零和校满刻度的多路模拟信号数据采集电路，属于电子技术应用领域。The invention relates to a multi-channel analog signal data acquisition automatic correction circuit and a calibration method, relating to a multi-channel analog signal data acquisition circuit which requires automatic zero calibration and a full scale calibration, and belongs to the field of electronic technology application.
背景技术Background technique
在电子技术应用领域经常会涉及到有关各类传感器信号数据采集电路的设计，这些传感器信号通常是模拟量，幅值较小(毫伏级)，需要通过信号放大单元将信号放大，然后通过A/D转换单元把模拟信号变为数字量，最后送控制单元处理。在信号放大单元部分，通常需要设置调零电位器和调满幅值电位器，用于信号测量基准的校对。这个校对通常是在产品出厂调试的时候由人工调节调零电位器和调满幅值电位器来完成的。然而，由于IC制造工艺和电路设计方面的原因，加上人工调节存在误差，信号放大单元经常会随着应用环境的不同存在基准漂移问题，对于多路传感器信号数据的采集，还存在同类型传感器信号采集，相同测量条件下不同信道之间采集数据不一致的问题，传统的模拟信号数据采集电路见附图1。In the field of electronic technology applications, the design of data acquisition circuits for various types of sensor signals is often involved. These sensor signals are usually analog and have a small amplitude (millivolts). The signal amplification unit needs to be amplified by the signal amplification unit and then passed through A. The /D conversion unit turns the analog signal into a digital quantity and finally sends it to the control unit for processing. In the signal amplifying unit part, it is usually necessary to set a zeroing potentiometer and a full-scale amplitude potentiometer for proofreading of the signal measurement reference. This proofreading is usually done by manually adjusting the zero potentiometer and the full-scale potentiometer when the product is commissioned. However, due to IC manufacturing process and circuit design reasons, as well as manual adjustment errors, the signal amplification unit often has a reference drift problem depending on the application environment. For the collection of multi-channel sensor signal data, the same type of sensor exists. Signal acquisition, the problem of inconsistent data acquisition between different channels under the same measurement conditions, the conventional analog signal data acquisition circuit is shown in Figure 1.
已有的一种改进的多路模拟信号数据采集电路(见附图2)，通过增加电子开关，使多路传感器共享一套信号放大单元，但这种方法只能针对上述不同信道之间采集数据不一致的问题起到一定作用，信号放大单元随着应用环境的变化，基准漂移的问题仍然存在，并且产生新问题：(1)由人工调节的信号放大电路的调零电位器和调满幅值电位器难以调节到某一个合适位置可以满足多个不同的传感器信号输入要求；(2)电子开关频繁切换不同信道的传感器信号输入，开关扰动对毫伏级的信号输入造成极大干扰。An improved multi-channel analog signal data acquisition circuit (see FIG. 2) has been used to share a set of signal amplification units by adding electronic switches, but this method can only be used to collect between different channels. The problem of inconsistent data plays a certain role. The signal amplifying unit still has the problem of reference drift as the application environment changes, and new problems arise: (1) The zero-adjusting potentiometer and the full-scale of the signal amplifying circuit manually adjusted The value potentiometer is difficult to adjust to a certain suitable position to meet a variety of different sensor signal input requirements; (2) the electronic switch frequently switches the sensor signal input of different channels, and the switch disturbance greatly interferes with the millivolt level signal input.
另一种改进的传统模拟信号数据采集电路(见图3)，采用IC制造厂商专用的传感器测量模块替代信号放大单元和A/D转换单元，将原先的信号放大和A/D转换两项功能交由专业制造厂商的集成电路来完成，电路设计变得简洁，稳定性得到保证。但是也存在比如专用芯片价格较高、量程范围较窄、不适应多路传感信号采集、电子开关扰动对毫伏级的信号造成干扰等问题。Another improved traditional analog signal data acquisition circuit (see Figure 3) uses an IC manufacturer-specific sensor measurement module instead of a signal amplification unit and an A/D conversion unit to convert the original signal amplification and A/D conversion functions. It is completed by an integrated circuit of a professional manufacturer, and the circuit design is simplified and the stability is ensured. However, there are also problems such as a high price of a dedicated chip, a narrow range of the range, an inability to adapt to multi-channel sensing signal acquisition, and an interference of the electronic switch disturbance to the millivolt level signal.
发明内容Summary of the invention
本发明的目的是针对上述不足之处提供一种多路模拟信号数据采集自动校 正电路和校正方法，可以根据要求实时自动校正每一路传感器信号的零点基准和满刻度基准，避免人工调节的不稳定性，解决不同信道之间测量不一致的问题，消除不同环境下信号放大单元基准漂移带来的影响。The object of the present invention is to provide an automatic calibration of multi-channel analog signal data acquisition for the above-mentioned deficiencies Positive circuit and calibration method, which can automatically correct the zero reference and full scale reference of each sensor signal in real time according to requirements, avoid manual adjustment instability, solve the problem of inconsistent measurement between different channels, and eliminate the signal amplification unit reference in different environments. The impact of drift.
本发明是采取以下技术方案实现的：The invention is implemented by the following technical solutions:
一种多路模拟信号数据采集自动校正电路由信号采集电路、A/D转换单元和控制单元依次连接而成；信号采集电路包括信号放大单元、标准满刻度信号端、标准零信号端和电子开关；控制单元与电子开关的控制端相连，信号放大单元、标准满刻度信号端以及标准零信号端分别与电子开关的输入端相连；由控制单元发送控制信息到电子开关，电子开关自动切换与传感器信号端、标准满刻度信号端或标准零信号端连接，并将该输入端信号传至信号放大单元；传感器信号端的信号来自于传感器；标准满刻度信号端的信号以及标准零信号端的信号均取自电路标准电源信号；A multi-channel analog signal data acquisition automatic correction circuit is sequentially connected by a signal acquisition circuit, an A/D conversion unit and a control unit; the signal acquisition circuit comprises a signal amplification unit, a standard full-scale signal terminal, a standard zero-signal terminal and an electronic switch. The control unit is connected to the control end of the electronic switch, the signal amplifying unit, the standard full-scale signal end and the standard zero signal end are respectively connected to the input end of the electronic switch; the control unit sends the control information to the electronic switch, and the electronic switch automatically switches and the sensor The signal end, the standard full-scale signal end or the standard zero signal end is connected, and the input end signal is transmitted to the signal amplifying unit; the signal of the sensor signal end is from the sensor; the signal of the standard full-scale signal end and the signal of the standard zero signal end are taken from Circuit standard power signal;
所述A/D转换单元用于将信号放大单元送来的模拟量信号转换为数字化信号；The A/D conversion unit is configured to convert an analog signal sent by the signal amplifying unit into a digitized signal;
所述控制单元采用微处理器和存储器，微处理器用于收集A/D转换单元送来的输入信号数字化后的数值，分析计算后进行处理；存储器用于保存各类测量及运行数据。The control unit uses a microprocessor and a memory, and the microprocessor collects digitized values of the input signals sent by the A/D conversion unit, and performs processing after analysis and calculation; the memory is used to store various types of measurement and operation data.
所述微处理器采用市售的嵌入式微处理器或单片机。The microprocessor uses a commercially available embedded microprocessor or microcontroller.
多路模拟信号数据采集自动校正电路的校正方法包括两种模式，即出厂调试模式和自动校正模式，通过在控制单元设置来切换，控制模式设置完成以后，由控制单元自动完成相应的校正，不需要人工调节干预；The correction method of the multi-channel analog signal data acquisition automatic correction circuit includes two modes, namely, the factory debugging mode and the automatic calibration mode, which are switched by setting in the control unit, and after the control mode setting is completed, the control unit automatically completes the corresponding correction, Manual adjustment intervention is required;
自动校正模式是控制单元的默认控制模式，在以下两种情况下控制单元对传感器信号采集电路进行自动校正：一是控制单元每次断电重新上电时；二是可以由控制单元设置的时间参数决定是否执行自动校正以及执行自动校正的周期。The automatic correction mode is the default control mode of the control unit. The control unit automatically corrects the sensor signal acquisition circuit in the following two cases: one is when the control unit is powered off again each time; the other is the time that can be set by the control unit. The parameters determine whether to perform automatic calibration and the cycle in which automatic calibration is performed.
所述出厂调试模式，包括如下步骤：The factory debugging mode includes the following steps:
1-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；1-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
1-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零 信号所对应的标准零信号基准测量数据；1-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero Standard zero signal reference measurement data corresponding to the signal;
1-3)步骤1-2)中标准零信号基准测量数据保存完成后，控制单元自动控制传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；1-3) After the standard zero signal reference measurement data is saved in step 1-2), the control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch with the input standard full-scale signal end;
1-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据，此时，控制单元完成传感器信道一的出厂调试过程；1-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel one. Signal reference measurement data, at this time, the control unit completes the factory debugging process of the sensor channel one;
1-5)在完成传感器信道一的出厂调试后，控制单元开始执行传感器信道二的出厂调试，方法同传感器信道一的出厂调试；完成出厂调试后，分别得到传感器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二；1-5) After completing the factory debugging of the sensor channel 1, the control unit starts to execute the factory debugging of the sensor channel 2, and the method is the same as the factory debugging of the sensor channel 1; after the factory debugging is completed, the standard zero signal corresponding to the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
1-6)以此类推，在控制单元完成所有传感器信道的出厂调试后，自动控制所有信道的电子开关切换成与输入传感器信号端相连，开始正常的数据采集；此时控制模式自动切换为自动校正模式。1-6) By analogy, after the control unit completes the factory debugging of all sensor channels, the electronic switch that automatically controls all channels is switched to be connected to the signal terminal of the input sensor to start normal data acquisition; at this time, the control mode is automatically switched to automatic. Correction mode.
所述自动校正模式，包括如下步骤：The automatic calibration mode includes the following steps:
2-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；2-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
2-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零信号所对应的标准零信号基准测量数据；2-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
2-3)步骤2-2)中标准零信号基准测量数据保存完成后，控制单元自动控制传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；2-3) After the standard zero signal reference measurement data is saved in step 2-2), the control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard full-scale signal end;
2-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据；2-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel 1. Signal reference measurement data;
2-5)控制单元自动控制传感器信道一的电子开关，使电子开关的输入端与输入信道一的传感器信号端相连；此时，控制单元完成传感器信道一的自动校正过程；2-5) The control unit automatically controls the electronic switch of the sensor channel one, so that the input end of the electronic switch is connected with the sensor signal end of the input channel one; at this time, the control unit completes the automatic calibration process of the sensor channel one;
2-6)在完成传感器信道一的自动校正后，控制单元开始执行传感器信道二的自动校正，方法同传感器信道一的自动校正；完成自动校正后，分别得到传感 器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二；2-6) After the automatic correction of the sensor channel one is completed, the control unit starts to perform the automatic correction of the sensor channel 2, and the method is automatically corrected with the sensor channel one; after the automatic correction is completed, the sensing is respectively obtained. Standard zero-signal reference measurement data corresponding to the standard zero signal of channel 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
2-7)以此类推，在控制单元完成所有传感器信道的自动校正后，结束本次自动校正。2-7) By analogy, this automatic correction is terminated after the control unit completes the automatic correction of all sensor channels.
本发明多路模拟信号数据采集自动校正电路的信号放大单元不再需要传统的人工调零电位器和人工调满幅值电位器电路，选择电路元件参数时只要信号放大单元满足传感器信号量程范围即可；标准满刻度信号可取电路标准电源信号比如+5V或+3.3V作为基准；标准零信号可取电路标准电源信号比如0V作为基准。The signal amplifying unit of the multi-channel analog signal data acquisition automatic correction circuit of the invention no longer needs the traditional manual zero potentiometer and the manual full-scale potentiometer circuit. When the circuit component parameters are selected, as long as the signal amplifying unit satisfies the sensor signal range, The standard full-scale signal can take the circuit standard power signal such as +5V or +3.3V as the reference; the standard zero signal can take the circuit standard power signal such as 0V as the reference.
本发明的优点：Advantages of the invention:
(1)信号放大电路设计时，不需调零电位器和调满幅值电位器，简化电路设计；(1) When designing the signal amplifying circuit, it is not necessary to adjust the potentiometer and adjust the full-scale potentiometer to simplify the circuit design;
(2)调零和调满刻度由控制单元自动执行，替代传统手动调节电位器，消除人工参与的不稳定性；(2) The zero adjustment and full scale are automatically executed by the control unit, replacing the traditional manual adjustment potentiometer to eliminate the instability of manual participation;
(3)各传感器信道的信号放大单元硬件电路不需像传统电路一样费心调节为性能参数精确一致。采用本发明的信号采集自动校正方法，每一路传感器信道都采集并记忆各自的标准零信号基准测量数据和标准满刻度信号基准测量数据，相当于各传感器信道可以各自独立调零和调满刻度，不需要像传统信号采集电路那样用统一的调零和调满刻度，有效避免同样传感器在不同信道之间测量不一致的问题；(3) The signal amplifying unit hardware circuit of each sensor channel does not need to be adjusted as the traditional circuit to accurately and consistently the performance parameters. By adopting the automatic signal acquisition correction method of the invention, each sensor channel collects and memorizes the respective standard zero signal reference measurement data and the standard full scale signal reference measurement data, which is equivalent to each sensor channel can be independently zeroed and adjusted to full scale. It is not necessary to use a uniform zero adjustment and full scale as in the conventional signal acquisition circuit, effectively avoiding the problem that the same sensor measures inconsistency between different channels;
(4)控制单元记忆的各传感器信道标准零信号基准测量数据和标准满刻度信号基准测量数据为经过A/D转换后的数字化数据，比起传统的模拟电路，稳定可靠，分辨率高；(4) Each sensor channel standard zero signal reference measurement data and standard full-scale signal reference measurement data memorized by the control unit are digitized data after A/D conversion, which is stable and reliable and has high resolution compared with the traditional analog circuit;
(5)“自动校正”模式的执行，提供了各传感器信道信号的实时调零和调满刻度，有效避免不同应用环境条件下信号放大单元的基准漂移问题。(5) The execution of the “automatic correction” mode provides real-time zeroing and full-scale calibration of the channel signals of each sensor, effectively avoiding the reference drift problem of the signal amplifying unit under different application environments.
附图说明DRAWINGS
以下将结合附图对本发明作进一步说明：The invention will be further described below in conjunction with the accompanying drawings:
图1是传统的模拟信号数据采集电路原理图；Figure 1 is a schematic diagram of a conventional analog signal data acquisition circuit;
图2是改进的传统模拟信号数据采集电路1原理图；2 is a schematic diagram of an improved conventional analog signal data acquisition circuit 1;
图3是改进的传统模拟信号数据采集电路2原理图； Figure 3 is a schematic diagram of an improved conventional analog signal data acquisition circuit 2;
图4是本发明多路模拟信号数据采集自动校正电路原理图。4 is a schematic diagram of an automatic correction circuit for multi-channel analog signal data acquisition according to the present invention.
具体实施方式detailed description
参照附图1～4，一种多路模拟信号数据采集自动校正电路由信号采集电路、A/D转换单元和控制单元依次连接而成；信号采集电路包括信号放大单元、标准满刻度信号端、标准零信号端和电子开关；控制单元与电子开关的控制端相连，信号放大单元、标准满刻度信号端以及标准零信号端分别与电子开关的输入端相连；由控制单元发送控制信息到电子开关，电子开关自动切换与传感器信号端、标准满刻度信号端或标准零信号端连接，并将该输入端信号传至信号放大单元；传感器信号端的信号来自于传感器；标准满刻度信号端的信号以及标准零信号端的信号均取自电路标准电源信号；Referring to Figures 1 to 4, a multi-channel analog signal data acquisition automatic correction circuit is sequentially connected by a signal acquisition circuit, an A/D conversion unit and a control unit; the signal acquisition circuit includes a signal amplification unit, a standard full-scale signal terminal, The standard zero signal end and the electronic switch; the control unit is connected to the control end of the electronic switch, the signal amplifying unit, the standard full scale signal end and the standard zero signal end are respectively connected to the input end of the electronic switch; the control unit sends the control information to the electronic switch The electronic switch automatically switches to the sensor signal terminal, the standard full-scale signal terminal or the standard zero signal terminal, and transmits the input signal to the signal amplifying unit; the signal of the sensor signal end comes from the sensor; the signal of the standard full-scale signal terminal and the standard The signals at the zero signal end are taken from the circuit standard power supply signal;
所述A/D转换单元用于将信号放大单元送来的模拟量信号转换为数字化信号；The A/D conversion unit is configured to convert an analog signal sent by the signal amplifying unit into a digitized signal;
所述控制单元采用微处理器和存储器，微处理器用于收集A/D转换单元送来的输入信号数字化后的数值，分析计算后进行处理；存储器用于保存各类测量及运行数据。The control unit uses a microprocessor and a memory, and the microprocessor collects digitized values of the input signals sent by the A/D conversion unit, and performs processing after analysis and calculation; the memory is used to store various types of measurement and operation data.
所述微处理器采用市售的嵌入式微处理器或单片机。The microprocessor uses a commercially available embedded microprocessor or microcontroller.
多路模拟信号数据采集自动校正电路的校正方法包括两种模式，即出厂调试模式和自动校正模式，通过在控制单元设置来切换，控制模式设置完成以后，由控制单元自动完成相应的校正，不需要人工调节干预；The correction method of the multi-channel analog signal data acquisition automatic correction circuit includes two modes, namely, the factory debugging mode and the automatic calibration mode, which are switched by setting in the control unit, and after the control mode setting is completed, the control unit automatically completes the corresponding correction, Manual adjustment intervention is required;
自动校正模式是控制单元的默认控制模式，在以下两种情况下控制单元对传感器信号采集电路进行自动校正：一是控制单元每次断电重新上电时；二是可以由控制单元设置的时间参数决定是否执行自动校正以及执行自动校正的周期。The automatic correction mode is the default control mode of the control unit. The control unit automatically corrects the sensor signal acquisition circuit in the following two cases: one is when the control unit is powered off again each time; the other is the time that can be set by the control unit. The parameters determine whether to perform automatic calibration and the cycle in which automatic calibration is performed.
所述出厂调试模式，包括如下步骤：The factory debugging mode includes the following steps:
1-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；1-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
1-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零信号所对应的标准零信号基准测量数据；1-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
1-3)步骤1-2)中标准零信号基准测量数据保存完成后，控制单元自动控制 传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；1-3) After the standard zero signal reference measurement data is saved in step 1-2), the control unit automatically controls An electronic switch of the sensor channel 1 connects the input end of the electronic switch to the input standard full-scale signal end;
1-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据，此时，控制单元完成传感器信道一的出厂调试过程；1-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel one. Signal reference measurement data, at this time, the control unit completes the factory debugging process of the sensor channel one;
1-5)在完成传感器信道一的出厂调试后，控制单元开始执行传感器信道二的出厂调试，方法同传感器信道一的出厂调试；完成出厂调试后，分别得到传感器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二；1-5) After completing the factory debugging of the sensor channel 1, the control unit starts to execute the factory debugging of the sensor channel 2, and the method is the same as the factory debugging of the sensor channel 1; after the factory debugging is completed, the standard zero signal corresponding to the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
1-6)以此类推，在控制单元完成所有传感器信道的出厂调试后，自动控制所有信道的电子开关切换成与输入传感器信号端相连，开始正常的数据采集；此时控制模式自动切换为自动校正模式。1-6) By analogy, after the control unit completes the factory debugging of all sensor channels, the electronic switch that automatically controls all channels is switched to be connected to the signal terminal of the input sensor to start normal data acquisition; at this time, the control mode is automatically switched to automatic. Correction mode.
所述自动校正模式，包括如下步骤：The automatic calibration mode includes the following steps:
2-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；2-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
2-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零信号所对应的标准零信号基准测量数据；2-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
2-3)步骤2-2)中标准零信号基准测量数据保存完成后，控制单元自动控制传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；2-3) After the standard zero signal reference measurement data is saved in step 2-2), the control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard full-scale signal end;
2-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据；2-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel 1. Signal reference measurement data;
2-5)控制单元自动控制传感器信道一的电子开关，使电子开关的输入端与输入信道一的传感器信号端相连；此时，控制单元完成传感器信道一的自动校正过程；2-5) The control unit automatically controls the electronic switch of the sensor channel one, so that the input end of the electronic switch is connected with the sensor signal end of the input channel one; at this time, the control unit completes the automatic calibration process of the sensor channel one;
2-6)在完成传感器信道一的自动校正后，控制单元开始执行传感器信道二的自动校正，方法同传感器信道一的自动校正；完成自动校正后，分别得到传感器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二； 2-6) After the automatic correction of the sensor channel 1 is completed, the control unit starts to perform automatic correction of the sensor channel 2, and the method is automatically corrected by the sensor channel 1; after the automatic correction is completed, the standard zero signal of the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
2-7)以此类推，在控制单元完成所有传感器信道的自动校正后，结束本次自动校正。2-7) By analogy, this automatic correction is terminated after the control unit completes the automatic correction of all sensor channels.
出厂调试模式和自动校正模式的区别在于：出厂调试模式是对电路能否正常运行、能否销售出厂的检验；自动校正模式是对电路在不同运行环境条件下适应性的不断自动调整。两种模式分别得到了各传感器信道的标准零信号基准测量数据REFx0和标准满刻度信号基准测量数据REFx1，其中，x是各传感器信道的编号，为1～n。而作为标准，零信号和满刻度信号对应的标准计算值VT0和VT1是已知的，可以作为参数事先设置存储在控制单元存储器中。The difference between the factory debugging mode and the automatic calibration mode is that the factory debugging mode is to check whether the circuit can operate normally and whether it can be sold at the factory; the automatic calibration mode is an automatic automatic adjustment of the adaptability of the circuit under different operating environment conditions. The two modes respectively obtain the standard zero signal reference measurement data REFx0 and the standard full scale signal reference measurement data REFx1 of each sensor channel, where x is the number of each sensor channel, which is 1 to n. As a standard, the standard calculated values VT0 and VT1 corresponding to the zero signal and the full scale signal are known and can be stored in the control unit memory as parameters in advance.
控制单元在正常工作时，不断对信道1～n的传感器信号进行采集，得到各传感器信道的信号实时测量数据REFx(x为信道编号)，控制单元根据各传感器信道的标准零信号基准测量数据REFx0和标准满刻度信号基准测量数据REFx1以及零信号和满刻度对应的标准计算值VT0和VT1，分别计算各传感器信道的实时测量值VTx。从而实现多路模拟信号数据采集自动校正和计算。 During normal operation, the control unit continuously collects the sensor signals of channels 1 to n to obtain real-time measurement data REFx (x is the channel number) of each sensor channel, and the control unit measures data REFx0 according to the standard zero signal reference of each sensor channel. The real-time measured value VTx of each sensor channel is calculated separately from the standard full-scale signal reference measurement data REFx1 and the standard calculated values VT0 and VT1 corresponding to the zero signal and the full scale. Thereby achieving automatic correction and calculation of multi-channel analog signal data acquisition.

Claims (6)

  1. 一种多路模拟信号数据采集自动校正电路由信号采集电路、A/D转换单元和控制单元依次连接而成，其特征在于：信号采集电路包括信号放大单元、标准满刻度信号端、标准零信号端和电子开关；控制单元与电子开关的控制端相连，信号放大单元、标准满刻度信号端以及标准零信号端分别与电子开关的输入端相连；由控制单元发送控制信息到电子开关，电子开关自动切换与传感器信号端、标准满刻度信号端或标准零信号端连接，并将该输入端信号传至信号放大单元；传感器信号端的信号来自于传感器；标准满刻度信号端的信号以及标准零信号端的信号均取自电路标准电源信号；A multi-channel analog signal data acquisition automatic correction circuit is formed by a signal acquisition circuit, an A/D conversion unit and a control unit, wherein the signal acquisition circuit comprises a signal amplification unit, a standard full-scale signal terminal, and a standard zero signal. The end and the electronic switch; the control unit is connected to the control end of the electronic switch, the signal amplifying unit, the standard full-scale signal end and the standard zero signal end are respectively connected with the input end of the electronic switch; the control unit sends the control information to the electronic switch, the electronic switch The automatic switching is connected with the sensor signal terminal, the standard full-scale signal terminal or the standard zero signal terminal, and the signal of the input terminal is transmitted to the signal amplifying unit; the signal of the sensor signal end is from the sensor; the signal of the standard full-scale signal terminal and the standard zero signal terminal The signals are taken from the circuit standard power supply signal;
    所述A/D转换单元用于将信号放大单元送来的模拟量信号转换为数字化信号；The A/D conversion unit is configured to convert an analog signal sent by the signal amplifying unit into a digitized signal;
    所述控制单元采用微处理器和存储器，微处理器用于收集A/D转换单元送来的输入信号数字化后的数值，分析计算后进行处理；存储器用于保存各类测量及运行数据。The control unit uses a microprocessor and a memory, and the microprocessor collects digitized values of the input signals sent by the A/D conversion unit, and performs processing after analysis and calculation; the memory is used to store various types of measurement and operation data.
  2. 根据权利要求1所述的多路模拟信号数据采集自动校正电路，其特征在于：所述微处理器采用嵌入式微处理器或单片机。The multi-channel analog signal data acquisition automatic correction circuit according to claim 1, wherein the microprocessor adopts an embedded microprocessor or a single chip microcomputer.
  3. 权利要求1所述的多路模拟信号数据采集自动校正电路的校正方法，其特征在于：校正方法包括两种模式，即出厂调试模式和自动校正模式，通过在控制单元设置来切换，控制模式设置完成以后，由控制单元自动完成相应的校正，不需要人工调节干预。The method for correcting a multi-channel analog signal data acquisition automatic correction circuit according to claim 1, wherein the correction method comprises two modes, that is, a factory debugging mode and an automatic correction mode, which are switched by setting in a control unit, and the control mode is set. After completion, the control unit automatically completes the corresponding correction without manual adjustment intervention.
  4. 根据权利要求3所述的多路模拟信号数据采集自动校正电路的校正方法，其特征在于：自动校正模式是控制单元的默认控制模式，在控制单元每次断电重新上电时和由控制单元设置的时间参数决定是否执行自动校正以及执行自动校正的周期两种情况下，由控制单元对传感器信号采集电路进行自动校正。The method for correcting a multi-channel analog signal data acquisition automatic correction circuit according to claim 3, wherein the automatic correction mode is a default control mode of the control unit, and is controlled by the control unit each time the power is turned off. The set time parameter determines whether to perform automatic correction and the period in which the automatic correction is performed. In both cases, the sensor signal acquisition circuit is automatically corrected by the control unit.
  5. 根据权利要求3所述的多路模拟信号数据采集自动校正电路的校正方法，其特征在于，所述出厂调试模式，包括如下步骤：The method for correcting a multi-channel analog signal data acquisition automatic correction circuit according to claim 3, wherein the factory debugging mode comprises the following steps:
    1-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；1-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
    1-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零 信号所对应的标准零信号基准测量数据；1-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero Standard zero signal reference measurement data corresponding to the signal;
    1-3)步骤1-2)中标准零信号基准测量数据保存完成后，控制单元自动控制传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；1-3) After the standard zero signal reference measurement data is saved in step 1-2), the control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch with the input standard full-scale signal end;
    1-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据，此时，控制单元完成传感器信道一的出厂调试过程；1-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel one. Signal reference measurement data, at this time, the control unit completes the factory debugging process of the sensor channel one;
    1-5)在完成传感器信道一的出厂调试后，控制单元开始执行传感器信道二的出厂调试，方法同传感器信道一的出厂调试；完成出厂调试后，分别得到传感器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二；1-5) After completing the factory debugging of the sensor channel 1, the control unit starts to execute the factory debugging of the sensor channel 2, and the method is the same as the factory debugging of the sensor channel 1; after the factory debugging is completed, the standard zero signal corresponding to the sensor channel 2 is respectively obtained. Standard zero-signal reference measurement data 2 and standard full-scale signal reference measurement data corresponding to the standard full-scale signal of sensor channel 2;
    1-6)以此类推，在控制单元完成所有传感器信道的出厂调试后，自动控制所有信道的电子开关切换成与输入传感器信号端相连，开始正常的数据采集；此时控制模式自动切换为自动校正模式。1-6) By analogy, after the control unit completes the factory debugging of all sensor channels, the electronic switch that automatically controls all channels is switched to be connected to the signal terminal of the input sensor to start normal data acquisition; at this time, the control mode is automatically switched to automatic. Correction mode.
  6. 根据权利要求3所述的多路模拟信号数据采集自动校正电路的校正方法，其特征在于，所述自动校正模式，包括如下步骤：The method for correcting a multi-channel analog signal data acquisition automatic correction circuit according to claim 3, wherein the automatic correction mode comprises the following steps:
    2-1)控制单元控制传感器信道一的电子开关，将电子开关的输入端与输入标准零信号端相连；2-1) The control unit controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard zero signal end;
    2-2)输入标准零信号接入稳定后，控制单元读取此时的A/D转换单元数据，并将此时的A/D转换单元数据保存在存储器中，由此得到传感器信道一的标准零信号所对应的标准零信号基准测量数据；2-2) After the input standard zero signal is stabilized, the control unit reads the A/D conversion unit data at this time, and saves the A/D conversion unit data at this time in the memory, thereby obtaining the sensor channel one. Standard zero signal reference measurement data corresponding to the standard zero signal;
    2-3)步骤2-2)中标准零信号基准测量数据保存完成后，控制单元自动控制传感器信道一的电子开关，将电子开关的输入端与输入标准满刻度信号端相连；2-3) After the standard zero signal reference measurement data is saved in step 2-2), the control unit automatically controls the electronic switch of the sensor channel one, and connects the input end of the electronic switch to the input standard full-scale signal end;
    2-4)输入标准满刻度信号接入稳定后，控制单元读取此时的A/D转换单元数据并保存在存储器中，由此得到传感器信道一的标准满刻度信号所对应的标准满刻度信号基准测量数据；2-4) After the input standard full-scale signal is stabilized, the control unit reads the A/D conversion unit data at this time and stores it in the memory, thereby obtaining the standard full scale corresponding to the standard full-scale signal of the sensor channel 1. Signal reference measurement data;
    2-5)控制单元自动控制传感器信道一的电子开关，使电子开关的输入端与输入信道一的传感器信号端相连；此时，控制单元完成传感器信道一的自动校正过程；2-5) The control unit automatically controls the electronic switch of the sensor channel one, so that the input end of the electronic switch is connected with the sensor signal end of the input channel one; at this time, the control unit completes the automatic calibration process of the sensor channel one;
    2-6)在完成传感器信道一的自动校正后，控制单元开始执行传感器信道二 的自动校正，方法同传感器信道一的自动校正；完成自动校正后，分别得到传感器信道二的标准零信号所对应的标准零信号基准测量数据二和传感器信道二的标准满刻度信号所对应的标准满刻度信号基准测量数据二；2-6) After completing the automatic correction of the sensor channel one, the control unit starts to execute the sensor channel two The automatic correction method is automatically corrected with the sensor channel one; after the automatic correction is completed, the standard zero signal reference measurement data corresponding to the standard zero signal of the sensor channel 2 and the standard full scale signal of the sensor channel 2 are respectively obtained. Full scale signal reference measurement data 2;
    2-7)以此类推，在控制单元完成所有传感器信道的自动校正后，结束本次自动校正。 2-7) By analogy, this automatic correction is terminated after the control unit completes the automatic correction of all sensor channels.
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