A frequency phase diagram method for presenting frequency domain information of vibration signals of nuclear power equipment

Abstract

The present invention relates to a frequency-phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals, which can display the frequency, amplitude, and phase signals of nuclear power equipment vibration signals in the frequency domain in a two-axis diagram. The frequencies of nuclear power equipment vibration signals in the frequency domain are arranged in sequence on the horizontal axis according to the numerical values, and the vertical axis is marked with the amplitude expression form and unit of the frequency. The phase line of each frequency starts from the horizontal axis and extends upward along the vertical axis, with an extension height of h. p1 , and end at the phase point, draw a line segment, which is the phase line; starting from the phase point, continue to extend upward to the frequency amplitude height h A1 At the end, a line segment is drawn, and the line segment is the upper segment line of the amplitude. The present invention can display the three signals of frequency, amplitude and phase in the frequency domain of the vibration signal of the nuclear power equipment in a two-axis graph.

Description

Technical Field

[0001] The present invention relates to a frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals, which can fully display three signals of frequency, amplitude and phase in the frequency domain of nuclear power equipment vibration signals in a two-coordinate axis diagram. Background Art

[0002] There are a large number of vibration signals of nuclear power equipment in nuclear power plants. The frequency domain signals and time domain signals can be converted to each other using the Fourier transform formula:

[0003]

[0004] Where y(t) is the time domain signal, A k The frequency is f k The amplitude of the signal in the frequency domain, The frequency is f k The phase in the frequency domain signal. Based on this formula, the frequency domain signal and time domain signal of nuclear power equipment vibration can be converted one by one to each other. The spectrum diagram only contains frequency and amplitude information. From the Fourier transform formula, it can be seen that there is no phase information in the spectrum diagram, so the time domain information cannot be accurately restored using the spectrum diagram. The time domain diagram of the vibration signal of nuclear power equipment is a two-coordinate diagram, so it is also hoped that a two-coordinate axis diagram can be used to conveniently display the vibration signal of nuclear power equipment in the frequency domain, and the frequency domain diagram and time domain diagram can be realized. Figure 1 Therefore, it is necessary to invent a frequency phase diagram method for presenting the frequency domain information of the vibration signal of nuclear power equipment. Summary of the invention

[0005] The object of the present invention is to provide a frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals, which is used to display three types of information, namely frequency, amplitude and phase, of nuclear power equipment vibration signal information in a two-axis diagram.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A frequency-phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals. The frequencies of nuclear power equipment vibration signals in the frequency domain are arranged in sequence on the horizontal axis according to the numerical values. The vertical axis is marked with the amplitude expression form and unit of the frequency. The phase line of each frequency starts from the horizontal axis and extends upward along the vertical axis. The extension height is h. p1 , and end at the phase point, draw a line segment, which is the phase line; starting from the phase point, continue to extend upward to the frequency amplitude height h A1 End, draw a line segment, which is the upper segment line of the amplitude.

[0008] The phase line and the upper amplitude line are distinguished by different line types or different colors.

[0009] The phase line is represented by a dotted line, and the upper amplitude line is represented by a solid line.

[0010] angle h p1 、h A1 The relationship is as follows:

[0011]

[0012] The amplitude of each frequency is the ordinate value of the highest point on the upper segment of the amplitude line; the phase of each frequency is as follows:

[0013]

[0014] The phase point is a hollow point.

[0015] The phase points are thicker than the width of the phase line and the upper amplitude line.

[0016] The beneficial effects achieved by the present invention are:

[0017] The frequency, amplitude and phase of the vibration signal of nuclear power equipment are displayed in a two-axis graph. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of frequency phase diagram;

[0019] In the figure: phase line 1, phase point 2, upper amplitude line 3, ordinate axis 4, abscissa axis 5, amplitude height h A1 , phase height h p1 . DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1 The present invention is a frequency phase diagram method for presenting frequency domain information of vibration signals of nuclear power equipment, including a phase line 1, a phase point 2, an upper amplitude line 3, a vertical axis 4, and a horizontal axis 5.

[0022] The frequencies of the signal in the frequency domain are arranged in order on the horizontal axis 5 according to the numerical value, and the specific position is determined by comparing with the horizontal axis scale. The maximum value of the vertical axis scale on the vertical axis 4 must exceed the maximum frequency amplitude, and the phase of the frequency does not need to be considered. The vertical axis title only needs to mark the amplitude expression form and unit of the frequency, and the phase of the frequency does not need to be considered. The phase line of each frequency starts from the horizontal axis 5 and extends upward along the vertical axis direction. The extension height is h p1, and end at phase point 2, draw a line segment, which is phase line 1. Phase point 2 is a hollow point. The phase points are thicker than the width of phase line 1 and the upper amplitude line 3. Starting from phase point 2, continue to extend upward to the frequency amplitude height h A1 End, draw a line segment, which is the upper amplitude segment line 3. Phase line 1 and upper amplitude segment line 3 can be distinguished by different line types or different colors. For example, in the example, the phase line is a dotted line and the upper amplitude segment line is a solid line.

[0023] in h p1 、h A1 The relationship is as follows:

[0024]

[0025] in is the angle.

[0026] When reading the frequency-phase diagram, the amplitude of each frequency is the highest point ordinate value of the upper amplitude line 3; the phase of each frequency is as follows:

[0027] .

Claims

1. A frequency phase diagram method for presenting frequency domain information of vibration signals of nuclear power equipment, characterized in that: The frequencies of the vibration signal of nuclear power equipment in the frequency domain are arranged in sequence on the horizontal axis according to the numerical value. The vertical axis marks the amplitude expression form and unit of the frequency. The phase line of each frequency starts from the horizontal axis and extends upward along the vertical axis. The extension height is h p1 , and end at the phase point, draw a line segment, which is the phase line; starting from the phase point, continue to extend upward to the frequency amplitude height h A1 End, draw a line segment, which is the upper segment line of the amplitude; angle h p1 、h A1 The relationship is as follows: The amplitude of each frequency is the ordinate value of the highest point on the upper segment of the amplitude line; the phase of each frequency is as follows:

2. The frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals according to claim 1 is characterized in that: The phase line and the upper amplitude line are distinguished by different line types or different colors.

3. The frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals according to claim 2 is characterized in that: The phase line is represented by a dotted line, and the upper amplitude line is represented by a solid line.

4. The frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals according to claim 1, characterized in that: The phase point is a hollow point.

5. The frequency phase diagram method for presenting frequency domain information of nuclear power equipment vibration signals according to claim 1, characterized in that: The phase points are thicker than the width of the phase line and the upper amplitude line.

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