CN102928160A - Method for measuring dynamic balance of machinery - Google Patents

Method for measuring dynamic balance of machinery Download PDF

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CN102928160A
CN102928160A CN2012104736551A CN201210473655A CN102928160A CN 102928160 A CN102928160 A CN 102928160A CN 2012104736551 A CN2012104736551 A CN 2012104736551A CN 201210473655 A CN201210473655 A CN 201210473655A CN 102928160 A CN102928160 A CN 102928160A
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operational amplifier
series
connected
resistor
signal
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CN2012104736551A
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于星光
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昆山北极光电子科技有限公司
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Abstract

The invention discloses a method for measuring dynamic balance of machinery. The method provided by the invention comprises a first operational amplifier A1, a second operational amplifier A2, a third operational amplifier A3, eight resistors R1-R8 and two potentiometers W1 and W2. The method provided by the invention is used for on-line measurement of the dynamic balance of the machinery in the power generation industry, can automatically eliminate measuring errors caused by zero drift, temperature excursion and common-mode interference signal, and has the advantages of high precision and low cost.

Description

—种机械的动平衡测量方法 - balancing the mechanical measuring method species

技术领域 FIELD

[0001] 本发明属于发电行业机械动平衡测量领域,特别涉及一种机械的动平衡测量方法。 [0001] The present invention pertains to balancing machines measure the power generation industry, and in particular relates to a method of measuring a mechanical balancing.

背景技术 Background technique

[0002] 常用机械中各种旋转体,由于材质或加工等多种因素,使得旋转体在旋转时,其上每个微小质点产生的离心惯性力不能相互抵消,离心惯性力通过轴承作用到机械及其基础上,引起振动,产生了噪音,加速轴承磨损,缩短了机械寿命,严重时能造成破坏性事故。 [0002] Various conventional mechanical rotary body, due to many factors like materials or processing, so that the rotating body is rotated, the centrifugal force generated on each of the minute particles which can not cancel each other out, centrifugal force acting through mechanical bearings its basis, cause vibration, resulting in noise, accelerated bearing wear and shorten the mechanical life, serious accidents can be devastating. 为此,必须对其进行平衡,使其达到允许的平衡精度等级,或使因此产生的机械振动幅度降在允许的范围内。 For this purpose, it must be balanced, allowed to reach equilibrium level of accuracy, or so that the amplitude of the mechanical vibration generated by the drop in the allowable range.

[0003] 在现有技术中,静态物体的各项参数很容易用各种方法测量,但对于旋转体运动时的测量方法不是很理想,因此传感器必须安装在被测量的运动的部件上,但传感器输出具有信号小、噪声大、温漂等缺陷,如何对传感器信号进行优化处理,是动平衡测量的关键。 [0003] In the prior art, the parameters of the static object is easily measured by various methods, but the method is not ideal for measuring body movement during rotation, the sensor must be installed on the moving member to be measured, but having a small sensor output signal, noise, drift and other defects, how to optimize the sensor signal, it is the key measurement of dynamic balance.

发明内容 SUMMARY

[0004] 本发明的目在于提供一种用于发电行业机械动平衡的在线测量方法。 [0004] The object of the present invention to provide a method of measuring the line A power generation industry for mechanical balancing.

[0005] 实现上述目的的技术方案是:一种机械的动平衡测量方法,它包括第一运算放大器Al、第二运算放大器A2、第三运算放大器A3、八个电阻R1-R8、两个电位器Wl和W2。 [0005] The technical solution to achieve the above object is: A method for measuring dynamic balancing machine, comprising a first operational amplifier Al, a second operational amplifier A2, the third operational amplifier A3, eight resistors R1-R8, two potential is Wl and W2.

[0006] 上述的一种机械的动平衡测量方法,其中:所述的第一运算放大器Al的正相输入端与电源电压信号的正极V+之间串联有整个所述电位器Wl,与电源电压信号的负极V-之间串联有整个所述电位器W2,反相输入端与被检测电压信号Lef t之间串联有所述电阻Rl,反相输入端与所述第一运算放大器Al输出端Lout之间串联有所述电阻R2。 [0006] Balancing of a mechanical measuring method described above, wherein: V series between the positive electrode of the first operational amplifier positive input terminal Al of the power supply voltage of the entire signal has + Wl of the potentiometer, the power supply voltage connected in series between the negative electrode across said potential V- signal for the W2, resistor Rl has a series between the inverting input and the detected voltage signal Lef t, Al and the output terminal of the inverting input terminal of said first operational amplifier connected in series between the resistor R2 Lout.

[0007] 上述的一种机械的动平衡测量方法,其中:所述的第二运算放大器A2的正相输入端与电源电压信号的正极V+之间串联有整个所述电位器Wl,与电源电压信号的负极V-之间串联有整个所述电位器W2,反相输入端与被检测电压信号Right之间串联有所述电阻R3 ;反相输入端与所述第一运算放大器Al输出端Rout之间串联有所述电阻R4。 [0007] Balancing of a mechanical measuring method described above, wherein: the positive-phase signal input terminal and a positive supply voltage V of the second operational amplifier A2 is connected in series between + Wl of the whole of the potentiometer, the power supply voltage connected in series between the negative electrode across said potential V- signal for the W2, in series between the inverting input terminal of a voltage signal to be detected Right the resistor R3; Al output terminal and the inverting input terminal of said first operational amplifier Rout connected in series between the resistor R4.

[0008] 上述的一种机械的动平衡测量方法,其中:所述的第三运算放大器A3的正相输入端与电源电压信号的正极V+之间串联有整个所述电位器Wl和所述电阻R8,与电源电压信号的负极V-之间串联有整个所述电位器W2和所述电阻R8,与所述第二运算放大器A2的输出端Rout之间串联有所述电阻R7,反相输入端与所述第一运算放大器Al输出端Lout之间串联有所述电阻R5,反相输入端与所述第三运算放大器A3输出端out之间串联有所述电阻R6。 [0008] The above-described method of measuring a balancing machine, wherein: said third positive input terminal of the operational amplifier and the positive supply voltage signal + V A3 is connected in series between the overall resistance of the potentiometer and Wl R8, between the negative supply voltage V- signal and connected in series across said potentiometer W2 and the resistor R8, between the output terminal Rout of the second operational amplifier A2 is connected in series with the resistor R7, an inverting input resistor R5 connected in series between the first terminal and the output terminal of the operational amplifier Al Lout, in series between the inverting input terminal and the output terminal of the third operational amplifier A3 out of the resistor R6.

[0009] 上述的一种机械的动平衡测量方法,其中:所述的第一运算放大器Al、所述的第二运算放大器A2、所述的第三运算放大器A3是位于同一集成电路内的三个相同参数的运算放大器。 [0009] Balancing of a mechanical measuring method described above, wherein: said first operational amplifier Al, the second operational amplifier A2, the third operational amplifier A3 is located within the same integrated circuit three identical parameters of the operational amplifier.

[0010] 上述的一种机械的动平衡测量方法,其中:所述电阻Rl和R3阻值相等,所述电阻R2和R4阻值相等,所述电阻R5和R7阻值相等,所述电阻R6和R8阻值相等。 [0010] Balancing of a mechanical measuring method described above, wherein: Rl and the resistor R3 with resistance equal to the resistance of the resistors R2 and R4, R5 and R7 is equal to the resistance of the resistor, the resistor R6 and R8 is equal to the resistance.

[0011] 上述的一种机械的动平衡测量方法,其中:所述电位器Wl和W2阻值相等。 [0011] Balancing of a mechanical measuring method described above, wherein: said potential is equal to Wl and W2 resistance.

[0012] 本发明的有益效果是:用于发电行业机械动平衡的在线测量,可有效消除自动消除布线、零漂、温漂以及共模干扰信号引起的测量误差,具有精度高、成本低的优点。 [0012] Advantageous effects of the present invention is that: the power generation industry for on-line measurement of mechanical dynamic balance, can effectively eliminate routing automatically eliminate, zero drift, temperature drift and a common mode error signal caused by interference measurement, high accuracy, low cost advantage.

附图说明 BRIEF DESCRIPTION

[0013] 图I是本发明的结构示意图。 [0013] FIG. I is a schematic structural diagram of the present invention.

具体实施方式 Detailed ways

[0014] 下面将结合附图对本发明作进一步说明。 [0014] The following with reference to the present invention will be further described.

[0015] 请参阅图1,图中给出了一种机械的动平衡测量方法,它包括第一运算放大器Al、 第二运算放大器A2、第三运算放大器A3、八个电阻R1-R8、两个电位器Wl和W2。 [0015] Referring to FIG. 1, FIG. The method of measuring a mechanical balancing, which comprises a first operational amplifier Al, a second operational amplifier A2, the third operational amplifier A3, eight resistors R1-R8, two potentiometer Wl and W2.

[0016] 第一运算放大器Al的正相输入端与电源电压信号的正极V+之间串联有整个电位器W1,与电源电压信号的负极V-之间串联有整个电位器W2,反相输入端与被检测电压信号Left之间串联有输入电阻Rl ;反相输入端与放大器A1输出端Lout之间串联有电阻R2。 [0016] V positive electrode of the first operational amplifier Al to the inverting input terminal of the supply voltage signal has a whole series between the + potentiometer W1, between the negative supply voltage V- signal and connected in series across potentiometer W2, an inverting input terminal and a resistor Rl are connected in series between the input voltage detection signal Left; resistor R2 connected in series between the inverting input terminal of the amplifier A1 and the output terminal Lout.

[0017] 第二运算放大器A2的正相输入端与电源电压信号的正极V+之间串联有整个电位器W1,与电源电压信号的负极V-之间串联有整个电位器W2,反相输入端与被检测电压信号Right之间串联有输入电阻R3 ;反相输入端与放大器Al输出端Rout之间串联有电阻R4。 [0017] The positive-phase signal input terminal and a positive supply voltage V + of the second operational amplifier A2 is connected in series between the entire potentiometer W1, between the negative supply voltage V- signal and connected in series across potentiometer W2, an inverting input terminal and a resistor R3 are connected in series between the input voltage detection signal Right; a resistor R4 connected in series between the output terminal Al to the amplifier inverting input terminal Rout.

[0018] 电阻Rl和R3的阻值完全相等。 Exactly equal to [0018] the resistance of resistors Rl and R3.

[0019] 电阻R2和R4的阻值完全相等。 Exactly equal to [0019] of the resistor R2 and the resistance R4.

[0020] 电位器Wl和W2完全相同。 [0020] Wl and W2 are identical potentiometer.

[0021] 第一运算放大器A1的输出Lout用公式I表示如下: [0021] The output of the first operational amplifier A1 Lout by Equation I as follows:

[0022] Lout=- (R2/R1) X Left,公式I [0022] Lout = - (R2 / R1) X Left, Formula I

[0023] 第二运算放大器A2的输出Rout用公式2表示如下: [0023] The output Rout of the second operational amplifier A2 is represented by the following formula 2:

[0024] Rout=-(R4/R3) XRight,公式2 [0024] Rout = - (R4 / R3) XRight, Equation 2

[0025] 第三运算放大器A3的正相输入端与电源电压信号的正极V+之间串联有整个电位器Wl和电阻R8,与电源电压信号的负极V-之间串联有整个电位器W2和电阻R8,与放大器A2的输出端Rout之间串联有电阻R7,反相输入端与放大器Al输出端Lout之间串联有电阻R5,反相输入端与放大器A3输出端out之间串联有电阻R6。 [0025] in series with a potentiometer across a resistor R8 between Wl and the third operational amplifier A3 positive-phase signal input terminal of the positive supply voltage V +, V- between the negative supply voltage signal and connected in series, and the entire potentiometer resistance W2 R8, between the output terminal of the amplifier A2 Rout connected in series with resistor R7, a resistor R5 connected in series between the inverting input terminal of the amplifier Al output terminal Lout, a resistor R6 connected in series between the inverting input terminal of the amplifier A3 and the output terminal out.

[0026] 电阻R5和R7的阻值完全相等。 Exactly equal to [0026] the resistance of resistors R5 and R7.

[0027] 电阻R6和R8的阻值完全相等。 Exactly equal to [0027] the resistance resistors R6 and R8.

[0028] 第三运算放大器A3的输出out用公式3表示如下: [0028] The output of the third operational amplifier A3 out by Equation 3 as follows:

[0029] out=(R6/R5) X (R2/R1) X (Left-Right),公式3 [0029] out = (R6 / R5) X (R2 / R1) X (Left-Right), Formula 3

[0030] 由公式I和公式2可以分别得到两个放大倍数相同,正比于被检测电压的信号。 [0030] from the formula I and Formula 2 can be a multiple of the same, the detected voltage is proportional to the two amplified signals, respectively. 被检测信号中夹带的现场布线及共模干扰信号为同相信号Vr,在公式I和公式2中,Left用Vr+Left代入,Right用Vr+Right代入,信号输入实际仍然为(Left-Right),消除了被检测信号中夹带的现场布线及共模干扰信号。 Detected signal entrained in the field wiring and the common mode interference signals phase signal Vr of, in Formula I and Formula 2, Left by Vr + Left substitutes, Right by Vr + Right substituted into the signal input actually remains (Left-Right ), field wiring and to eliminate common mode interference signals is entrained in the detection signal.

[0031 ] 第一运算放大器Al和所述的第二运算放大器A2是位于同一集成电路内的两个相同参数的运算放大器。 [0031] The first operational amplifier Al, and the second operational amplifier A2 is located in the same two parameters in the same integrated circuit operational amplifier. 运算放大器产生的零漂、温漂信号为Vw。 Zero drift of the op amp, drift signal Vw. 则公式I和公式2转换成如下公式5和公式6 : Formula I and Formula 2 is converted into the following Equation 5 and Equation 6:

[0032] Lout+Vw=-Left X R2/R1,公式5 [0032] Lout + Vw = -Left X R2 / R1, Formula 5

[0033] Rout+Vw=-Right X R4/R3,公式6 [0033] Rout + Vw = -Right X R4 / R3, Equation 6

[0034] 将公式5和公式6代入公式3得到公式7 : [0034] Equation 5 and Equation 6 into Equation 3 yields Equation 7:

[0035] out=(R6/R5) X (R2/R1) X (Left-Right),公式7 [0035] out = (R6 / R5) X (R2 / R1) X (Left-Right), Equation 7

[0036] 公式7完全消除了零漂、温漂信号的误差。 [0036] Equation 7 completely eliminates the zero drift, temperature drift error signal.

[0037] 本实施例中,第一、第二、第三运算放大器Al、A2、A3为LM064,电阻Rl,R3,R5,R7阻值为10K,电阻R2, R4, R6, R8阻值为IOOK0 [0037] In this embodiment, the first, the second, the third operational amplifier Al, A2, A3 of LM064, resistor Rl, R3, R5, R7 resistance is 10K, resistors R2, R4, R6, R8 resistance is IOOK0

[0038] 本发明的原理是:参考点选取中心点并且为0V,利用差分运放的共模抑制好和差模放大能力强的特性,直接测量动平衡的扰动,在线采样实时数据和历史纪录。 [0038] The principle of the invention is: selecting the reference point and the center point is 0V, the differential amplifier using the common-mode and differential mode suppression good amplification characteristics ability to directly measure dynamic balance disturbances, sampling line and real-time data history . 保证了发电行业机械动平衡测量的实时性、稳定性和精确性。 Ensure real-time measurement of the power generation industry machine dynamic balance, stability and accuracy.

[0039] 以上结合附图实施例对本发明进行了详细说明,本领域中普通技术人员可根据上述说明对本发明做出种种变化例。 [0039] While the invention has been described in detail in conjunction with the accompanying drawings embodiments of ordinary skill in the art that various changes may be made to the above embodiment of the present invention is described. 因而,实施例中的某些细节不应构成对本发明的限定,本发明将以所附权利要求书界定的范围作为本发明的保护范围。 Thus, certain details of the embodiments should not be construed as limiting the present invention, the present invention will define the scope of the claims appended as the scope of the present invention.

Claims (3)

1. 一种机械的动平衡测量方法,它包括第一运算放大器Al、第二运算放大器A2、第三运算放大器A3、八个电阻R1-R8、两个电位器Wl和W2,其中: 所述的第一运算放大器A1的正相输入端与电源电压信号的正极V+之间串联有整个所述电位器W1,与电源电压信号的负极V-之间串联有整个所述电位器W2,反相输入端与被检测电压信号Left之间串联有所述电阻R1,反相输入端与所述第一运算放大器A1输出端Lout之间串联有所述电阻R2 ; 所述的第二运算放大器A2的正相输入端与电源电压信号的正极V+之间串联有整个所述电位器W1,与电源电压信号的负极V-之间串联有整个所述电位器W2,反相输入端与被检测电压信号Right之间串联有所述电阻R3 ;反相输入端与所述第一运算放大器Al输出端Rout之间串联有所述电阻R4 ; 所述的第三运算放大器A3的正相输入端与电源电压信号的正极V+之 A method of measuring the dynamic balance machines, comprising a first operational amplifier Al, a second operational amplifier A2, the third operational amplifier A3, eight resistors R1-R8, Wl and W2 of two potentiometers, wherein: said positive input signal and the positive supply voltage V of the first operational amplifier A1 is connected in series between the + entire potentiometer W1, between the negative supply voltage V- signal and connected in series across said potentiometer W2, inverted an input terminal to be detected in series between the voltage signal Left the resistor R1, the inverting input and the first output terminal of the operational amplifier A1 Lout in series between the resistor R2; the second operational amplifier A2 positive input signal and the positive supply voltage V + is connected in series between the entire potentiometer W1, between the negative supply voltage V- signal and connected in series across said potentiometer W2, and the inverting input terminal of the voltage detection signal the resistor R3 is connected in series between the Right; in series between the inverting input terminal and the output terminal of the first operational amplifier Al Rout the resistor R4; said third operational amplifier positive input terminal of the power supply voltage A3 V + of the positive signal 串联有整个所述电位器Wl和所述电阻R8,与电源电压信号的负极V-之间串联有整个所述电位器W2和所述电阻R8,与所述第二运算放大器A2的输出端Rout之间串联有所述电阻R7,反相输入端与所述第一运算放大器Al输出端Lout之间串联有所述电阻R5,反相输入端与所述第三运算放大器A3输出端out之间串联有所述电阻R6 ; 所述的第一运算放大器Al、所述的第二运算放大器A2、所述的第三运算放大器A3是位于同一集成电路内的三个相同参数的运算放大器。 Connected in series across said potentiometer Wl and the resistor R8, between the negative supply voltage V- signal and connected in series across the potentiometer and the resistor W2 R8, the output terminal of said second operational amplifier A2 Rout connected in series between the resistor R7, a resistor R5 connected in series between the inverting input terminal and the output terminal of the first operational amplifier Al Lout, between the inverting input terminal and the output terminal of the third operational amplifier A3 out the resistor R6 connected in series; said first operational amplifier Al, the second operational amplifier A2, the third operational amplifier A3 is located in the same three parameters within the same integrated circuit operational amplifier.
2.根据权利要求I所述的一种机械的动平衡测量方法,其特征在于:所述的Rl和R3阻值相等,所述的R2和R4阻值相等,所述的R5和R7阻值相等,所述的R6和R8阻值相等。 The measuring method according to a mechanical balancing I as claimed in claim, wherein: Rl and R3 is equal to the resistance value, equal to the resistance R2 and R4, R5 and R7 of the resistance equal, equal to the resistance R6 and R8.
3.根据权利要求I所述的一种机械的动平衡测量方法,其特征在于:所述的电位器Wl和W2阻值相等。 3. The method of measuring a mechanical balancing according to claim I, wherein: Wl is equal to the potentiometer resistance and W2.
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