High/low tooth signal processing circuit of rotating speed fluted disc and real-time extraction method

A signal processing circuit and speed signal technology, applied in the field of signal processing, can solve problems such as low real-time performance and phase delay, and achieve the effect of simple and reliable circuit, fast response speed, and small software/hardware overhead

Pending Publication Date: 2022-07-15
株洲中航科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a high / low gear signal processing circuit and a real-time extraction method of a rotating speed gear plate, which are used to solve the current needs of separating and extracting high / low gear signals by using software to sample, analyze, distinguish, and Separation, resulting in the high / low tooth signal and the original high tooth signal have a phase delay and technical problems of low real-time performance

Method used

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  • High/low tooth signal processing circuit of rotating speed fluted disc and real-time extraction method
  • High/low tooth signal processing circuit of rotating speed fluted disc and real-time extraction method
  • High/low tooth signal processing circuit of rotating speed fluted disc and real-time extraction method

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Effect test

Embodiment 1

[0045] Embodiment 1, the high / low gear signal processing circuit of the first rotating speed gear plate.

[0046] like figure 1 and Figure 5 As shown, in order to obtain a high-tooth signal or a low-tooth signal in the rotational speed signal sequence of the rotational speed toothed disc 100, the rotational speed toothed disc 100 is monitored in real time by the rotational speed sensor 200, and the original rotational speed signal sequence output by the rotational speed sensor 200 includes a high toothed signal or Low tooth signal.

[0047] When the rotational speed sensor 200 adopts the eddy current rotational speed sensor, the output high tooth voltage value of the rotational speed sensor 200 corresponding to the high tooth 102 will be lower than the voltage value of the other normal tooth 101 on the rotational speed tooth plate 100; the rotational speed sensor 200 corresponding to the low tooth The voltage value of the output low tooth of 100 will be higher than the volt...

Embodiment 2

[0081] Embodiment 2, the high / low gear signal processing circuit of the second type of rotational speed chainring.

[0082] like image 3 As shown in the figure, the difference between the high / low gear signal processing circuit of the speed sprocket of this embodiment and the first embodiment is that the voltage adjustment circuit 400 of this embodiment includes a potentiometer W1, one end of the potentiometer W1 is connected to the VCC power supply, and the potentiometer W1 The other end of the potentiometer is grounded, and the adjustment end of the potentiometer W1 is connected to the negative input end of the first comparator U2.

[0083] In this embodiment, the potentiometer W1 is specifically an adjustable resistor. By adjusting the resistance value of the adjustable resistor connected to the first comparator U2, the threshold comparison voltage of the first comparator U2 is adjusted.

[0084] In this embodiment, the potentiometer W1 is used to manually adjust the thre...

Embodiment 3

[0086] Embodiment 3, the high / low gear signal processing circuit of the third rotational speed gear plate.

[0087] like Figure 4 As shown in the figure, the difference between the high / low gear signal processing circuit of the rotational speed gear plate of this embodiment and the first embodiment is that the high / low gear signal marking module 401 in the first embodiment is removed in this embodiment, so that the first comparator The input terminals of U2 and the second comparator U4 are respectively connected to two input terminals of the CPU.

[0088] The CPU performs rotational speed sampling on the normal rotational speed signal input by the second comparator U4 to the CPU, and performs pulse sampling on the pulse sequence of the high / low tooth signal output by the first comparator U2. When the two pulse signals sampled by the CPU are the same, Then the CPU determines that the identification of the high / low tooth information is unsuccessful, and the CPU updates the out...

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Abstract

The invention discloses a high / low tooth signal processing circuit of a rotating speed fluted disc, the signal processing circuit is electrically connected with a rotating speed sensor, the rotating speed sensor is used for acquiring a rotating speed signal sequence of the rotating speed fluted disc, and the rotating speed signal sequence comprises a high / low tooth signal and a normal rotating tooth signal. The signal processing circuit comprises a high / low tooth signal output circuit and a voltage regulation circuit. According to the high / low tooth signal processing circuit of the rotating speed fluted disc and the real-time extraction method, the threshold voltage value of the first comparator U2 is adjusted through voltage, and when the threshold voltage value is between a high tooth signal or a low tooth signal and other normal tooth signals on the rotating speed fluted disc, the first comparator U2 outputs the high tooth signal or the low tooth signal. The circuit is simple and reliable, low in software / hardware overhead, high in response speed and high in real-time performance, and does not cause any phase shift and hysteresis to the rotating speed phase.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a high / low gear signal processing circuit and a real-time extraction method of a rotational speed toothed disc. Background technique [0002] In applications such as aero-engines, ship engines, etc. that have strict requirements on space size, a high tooth that is a little higher than other normal teeth, or a low tooth that is a little lower than other normal gears is generally processed in the speed-measuring ring gear. The high-tooth signal information or the low-tooth signal information is included in the pick-up chainring speed signal pulse sequence, and the high-tooth signal information or the low-tooth signal information can be identified and extracted, which can be used to perform phase analysis on the vibration data of the engine or to compare the The key phase signal of the aero-engine rotor for local balance. In view of the existing technical level, there is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/46G06F3/05H03K5/24H03M1/12
CPCG01P3/46G06F3/05H03M1/1245H03K5/24H03M1/66
Inventor 易孟良曾建华
Owner 株洲中航科技发展有限公司
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