CN203178344U - Direct current voltage signal acquisition circuit - Google Patents
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- CN203178344U CN203178344U CN 201320147846 CN201320147846U CN203178344U CN 203178344 U CN203178344 U CN 203178344U CN 201320147846 CN201320147846 CN 201320147846 CN 201320147846 U CN201320147846 U CN 201320147846U CN 203178344 U CN203178344 U CN 203178344U
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Abstract
本实用新型公开了一种直流电压信号采集电路，包含第一运算放大器、第二运算放大器，外部传感器的采样信号通过串联的第一电阻和第二电阻与第一运算放大器的反相输入端连接，第一运算放大器的输出端通过第三电阻与第二运算放大器的反相输入端连接，第二运算放大器的输出端通过第四电阻向外部输出信号。第一运算放大器的同相输入端通过第五电阻接地；第一运算器的输出端通过第七电阻连接其反相输入端。第二运算放大器的同向输入端通过第六电阻接地；第二运算放大器的输出端通过第八电阻连接其反相输入端。第一电阻的前端通过第九电阻接地；第一电阻的后端通过第一电容接地。本实用新型能够放大调制输入的直流电压采样信号，并且结构简单，使用方便。
The utility model discloses a DC voltage signal acquisition circuit, which comprises a first operational amplifier and a second operational amplifier. The sampling signal of an external sensor is connected to the inverting input terminal of the first operational amplifier through the first resistor and the second resistor connected in series. , the output terminal of the first operational amplifier is connected to the inverting input terminal of the second operational amplifier through the third resistor, and the output terminal of the second operational amplifier outputs a signal to the outside through the fourth resistor. The non-inverting input end of the first operational amplifier is grounded through the fifth resistor; the output end of the first operational unit is connected to the inverting input end through the seventh resistor. The non-inverting input end of the second operational amplifier is grounded through the sixth resistor; the output end of the second operational amplifier is connected to the inverting input end through the eighth resistor. The front end of the first resistor is grounded through the ninth resistor; the rear end of the first resistor is grounded through the first capacitor. The utility model can amplify and modulate the input DC voltage sampling signal, and has simple structure and convenient use.
Description
技术领域 technical field
本实用新型涉及一种信号采集电路，尤其涉及一种用于多目标降损装置的直流电压信号采集电路。 The utility model relates to a signal acquisition circuit, in particular to a DC voltage signal acquisition circuit for a multi-target loss reduction device. the
背景技术 Background technique
节能降损工作在电网的建设和运行过程中十分重要，满足社会供电需求的情况下降低电能损耗具有长远的意义。 Energy saving and loss reduction work is very important in the construction and operation of power grids, and it has long-term significance to reduce power loss while meeting social power supply needs. the
多目标降损装置是一种新型的电力电子装置，它结合了串联、并联两个变流器，其设计直接关系到装置的补偿性能是否实现，参数的选择既影响补偿质量也关系到设备的制造成本。如何进行优化设计并在物理上实现这一新型结构的电力电子装置是一项具有积极意义的研究工作。针对电压跌落、电流谐波及无功等电能质量问题，及时、精确检测并实时补偿是关键，决定了该装置性能的优越性。这不仅要求要选择合适的检测和控制算法，对硬件电路也有较高要求，主要包括信号采集、补偿量检测、信号输出等环节。 The multi-objective loss reduction device is a new type of power electronic device. It combines two converters connected in series and parallel. Its design is directly related to whether the compensation performance of the device is realized. The selection of parameters not only affects the quality of compensation but also affects the quality of equipment manufacturing cost. How to optimize the design and physically realize the power electronic device of this new structure is a research work with positive significance. For power quality problems such as voltage drop, current harmonics and reactive power, timely and accurate detection and real-time compensation are the key, which determines the superiority of the device's performance. This not only requires the selection of appropriate detection and control algorithms, but also has high requirements for hardware circuits, mainly including signal acquisition, compensation amount detection, and signal output. the
实用新型内容 Utility model content
本实用新型提供了一种直流电压信号采集电路，能够放大调制输入的直流电压采样信号，并且结构简单，使用方便。 The utility model provides a DC voltage signal acquisition circuit, which can amplify and modulate the input DC voltage sampling signal, and has a simple structure and is convenient to use. the
本实用新型采用如下技术方案实现： The utility model adopts following technical scheme to realize:
一种直流电压信号采集电路，其中包含第一运算放大器、第二运算放大器，外部传感器的采样信号通过串联的第一电阻和第二电阻与所述第一运算放大器的反相输入端连接，所述第一运算放大器的输出端通过第三电阻与第二运算放大器的反相输入端连接，所述第二运算放大器的输出端通过第四电阻向外部输出信号。 A DC voltage signal acquisition circuit, which includes a first operational amplifier and a second operational amplifier, and the sampling signal of an external sensor is connected to the inverting input terminal of the first operational amplifier through a first resistor and a second resistor connected in series, so The output terminal of the first operational amplifier is connected to the inverting input terminal of the second operational amplifier through the third resistor, and the output terminal of the second operational amplifier outputs a signal to the outside through the fourth resistor.
上述的直流电压信号采集电路，其中所述第一运算放大器的同相输入端通过第五电阻接地；所述第一运算器的输出端通过第七电阻连接其反相输入端。 In the above DC voltage signal acquisition circuit, wherein the non-inverting input terminal of the first operational amplifier is grounded through the fifth resistor; the output terminal of the first arithmetic unit is connected to the inverting input terminal through the seventh resistor. the
上述的直流电压信号采集电路，其中所述第二运算放大器的同向输入端通过第六电阻接地；所述第二运算放大器的输出端通过第八电阻连接其反相输入端。 In the above DC voltage signal acquisition circuit, the non-inverting input terminal of the second operational amplifier is grounded through the sixth resistor; the output terminal of the second operational amplifier is connected to the inverting input terminal through the eighth resistor. the
上述的直流电压信号采集电路，其中所述第一电阻的前端通过第九电阻接地；所述第一电阻的后端通过第一电容接地。 In the above DC voltage signal acquisition circuit, the front end of the first resistor is grounded through the ninth resistor; the rear end of the first resistor is grounded through the first capacitor. the
上述的直流电压信号采集电路，其中所述第四电阻的后端通过第二电容接地。 In the above DC voltage signal acquisition circuit, the rear end of the fourth resistor is grounded through the second capacitor. the
本实用新型具有以下积极效果： The utility model has the following positive effects:
本实用新型直流电压采集电路将电压传感器采样信号的高压部分和控制部分进行了有效的电气隔离；电路中的运算放大器滤波效果好；电路中设置的反向放大电路，可通过改变对应电阻阻值实现对输出电压信号范围的调节；本实用新型包含两个运算放大器，结构简单，使用方便。 The DC voltage acquisition circuit of the utility model effectively electrically isolates the high-voltage part and the control part of the voltage sensor sampling signal; the operational amplifier in the circuit has a good filtering effect; The adjustment of the range of the output voltage signal is realized; the utility model includes two operational amplifiers, the structure is simple, and the use is convenient.
附图说明 Description of drawings
图1为本实用新型一种直流电压信号采集电路的电路图。 Fig. 1 is a circuit diagram of a DC voltage signal acquisition circuit of the present invention. the
具体实施方式 Detailed ways
以下结合附图，通过详细说明一个较佳的具体实施例，对本实用新型做进一步阐述。 The utility model will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings. the
如图1所示，本实用新型一种直流电压信号采集电路包含第一运算放大器U1、第二运算放大器U2，外部传感器的采样信号通过串联的第一电阻R1和第二电阻R2与所述第一运算放大器U1的反相输入端连接，第一运算放大器U1的输出端通过第三电阻R3与第二运算放大器U2的反相输入端连接，第二运算放大器U2的输出端通过第四电阻R4向外部输出信号。 As shown in Figure 1, a DC voltage signal acquisition circuit of the present invention includes a first operational amplifier U1 and a second operational amplifier U2, and the sampling signal of an external sensor is connected to the first resistor R1 and the second resistor R2 connected in series with the first operational amplifier U1 and the second operational amplifier U2. The inverting input terminal of an operational amplifier U1 is connected, the output terminal of the first operational amplifier U1 is connected with the inverting input terminal of the second operational amplifier U2 through the third resistor R3, and the output terminal of the second operational amplifier U2 is connected through the fourth resistor R4 Output signals to the outside. the
第一运算放大器U1的同相输入端通过第五电阻R5接地。第一运算器U1的输出端通过第七电阻R7连接其反相输入端。本实施例中，第一运算放大器U1的正电源输入端1与+15V电压连接，其负电源输入端2与-15V电压连接。 The non-inverting input terminal of the first operational amplifier U1 is grounded through the fifth resistor R5. The output terminal of the first arithmetic unit U1 is connected to its inverting input terminal through the seventh resistor R7. In this embodiment, the positive power supply input terminal 1 of the first operational amplifier U1 is connected to +15V voltage, and the negative power supply input terminal 2 thereof is connected to -15V voltage. the
第二运算放大器U2的同向输入端通过第六电阻R6接地。第二运算放大器U2的输出端通过第八电阻R8连接其反相输入端。 The non-inverting input end of the second operational amplifier U2 is grounded through the sixth resistor R6. The output terminal of the second operational amplifier U2 is connected to its inverting input terminal through the eighth resistor R8. the
第一电阻R1的前端通过第九电阻R9接地。第一电阻R1的后端通过第一电容C1接地。 The front end of the first resistor R1 is grounded through the ninth resistor R9. The back end of the first resistor R1 is grounded through the first capacitor C1. the
第四电阻的后端通过第二电容C2接地。 The back end of the fourth resistor is grounded through the second capacitor C2. the
外部传感器输入的直流电压采样信号输入第一运算放大器U1的反相输入端，其输出信号通过负反馈与其输入信号进行调制放大后通过第三电阻R3输入第二运算放大器U2的反相输入端，第二运算放大器U2的输出信号通过负反馈与其输入信号进行调制放大后经第四电阻R4向外输出。 The DC voltage sampling signal input by the external sensor is input to the inverting input terminal of the first operational amplifier U1, and its output signal is modulated and amplified by negative feedback and its input signal, and then input to the inverting input terminal of the second operational amplifier U2 through the third resistor R3, The output signal of the second operational amplifier U2 is modulated and amplified by negative feedback and its input signal, and then output through the fourth resistor R4. the
本实施例中，直流电压信号采用LEM公司的LV28-P传感器进行采样，其采样信号输入第一电阻R1，采样信号经本实用新型直流电压信号采集电路放大和调制到0~4V范围内后向外输出。 In this embodiment, the DC voltage signal is sampled by the LV28-P sensor of LEM Company, and the sampling signal is input to the first resistor R1, and the sampling signal is amplified and modulated to the range of 0~4V by the DC voltage signal acquisition circuit of the present utility model to the backward direction external output. the
外部的直流母线电压信号经电压传感器后输入本实用新型直流电压信号采集电路，次级的电流信号经第九电阻R9转换为电压信号，并经第一运算放大器U1和第二运算放大器U2滤波、反向放大和滤波后送至外部的A/D转换芯片采样通道。 The external DC bus voltage signal is input to the DC voltage signal acquisition circuit of the present invention through the voltage sensor, and the secondary current signal is converted into a voltage signal through the ninth resistor R9, and filtered by the first operational amplifier U1 and the second operational amplifier U2, After inverse amplification and filtering, it is sent to the sampling channel of the external A/D conversion chip. the
本实用新型直流电压采集电路将电压传感器采样信号的高压部分和控制部分进行了有效的电气隔离；电路中的运算放大器滤波效果好；电路中设置的反向放大电路，可通过改变对应电阻阻值实现对输出电压信号范围的调节。 The DC voltage acquisition circuit of the utility model effectively electrically isolates the high-voltage part and the control part of the voltage sensor sampling signal; the operational amplifier in the circuit has a good filtering effect; Realize the adjustment of the output voltage signal range. the
本实用新型能够放大调制输入的直流电压采样信号，并且结构简单，使用方便。 The utility model can amplify and modulate the input DC voltage sampling signal, and has simple structure and convenient use. the
尽管本实用新型的内容已经通过上述优选实施例作了详细介绍，但应当认识到上述的描述不应被认为是对本实用新型的限制。在本领域技术人员阅读了上述内容后，对于本实用新型的多种修改和替代都将是显而易见的。因此，本实用新型的保护范围应由所附的权利要求来限定。 Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims. the
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353558A (en) * | 2016-08-26 | 2017-01-25 | 成都鑫豪斯电子探测技术有限公司 | The co-signal processor of inductive load and resistive load used for electrical fire supervision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353558A (en) * | 2016-08-26 | 2017-01-25 | 成都鑫豪斯电子探测技术有限公司 | The co-signal processor of inductive load and resistive load used for electrical fire supervision |
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