CN111443215A - Rotating speed measuring system for bearing roller at high speed and high temperature - Google Patents

Rotating speed measuring system for bearing roller at high speed and high temperature Download PDF

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Publication number
CN111443215A
CN111443215A CN202010407282.2A CN202010407282A CN111443215A CN 111443215 A CN111443215 A CN 111443215A CN 202010407282 A CN202010407282 A CN 202010407282A CN 111443215 A CN111443215 A CN 111443215A
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bearing
bearing roller
receiving
speed
signal
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陈亚峰
唐进元
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Central South University
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Central South University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a rotating speed measuring system for a bearing roller at high speed and high temperature, which comprises an acquisition assembly, an amplifying and converting circuit and a control assembly, wherein the acquisition assembly is connected with the amplifying and converting circuit, the amplifying and converting circuit is connected with the control assembly, the acquisition assembly is arranged in a through hole of a bearing seat vertical to a bearing outer ring and the roller, and the top end of the acquisition assembly is tightly attached to the bearing outer ring. According to the invention, the acquisition assembly is arranged in the through hole of the bearing seat which is vertical to the bearing outer ring and the roller, and the top end of the acquisition assembly is tightly attached to the bearing outer ring, so that the echo signal of the bearing roller can be accurately received under the condition of ensuring the integrity of the bearing and not influencing the running state of the bearing, the rotating speed of the bearing roller can be analyzed according to the echo signal of the bearing roller, the influence on the working state of other parts can be avoided, and the bearing does not need to be subjected to any secondary processing.

Description

Rotating speed measuring system for bearing roller at high speed and high temperature
Technical Field
The invention relates to the technical field of bearing speed measurement and running state monitoring, in particular to a rotating speed measuring system for a bearing roller at high speed and high temperature.
Background
The bearing is an important supporting component applied to mechanical equipment, and is one of main factors influencing the safe and stable operation of the mechanical equipment. The rolling bearing has the characteristics of small friction force, simple lubrication, easy replacement and the like, so the rolling bearing is widely applied to the fields of aerospace, precision instruments, traffic equipment and the like.
The rolling bearing applied to aerospace is generally in a high-speed, high-temperature and light-load running state. The roller of the rolling bearing running under the high-speed, high-temperature and light-load state is easy to slip, particularly for the main shaft bearing of the aircraft engine, the service life of the engine is shortened due to the fact that the roller slips slightly, and serious air accident is caused. When the roller slides during the operation of the rolling bearing, the pushing action of the roller on the retainer is weakened, and the slip ratio of the retainer is increased. Therefore, the rolling bearing slip condition can be monitored by measuring the rotating speed of the retainer and calculating the slip rate at the corresponding rotating speed.
For bearings working in a high-temperature, high-speed and closed environment like a main shaft bearing of an aircraft engine, the traditional method for measuring the rotating speed of a bearing retainer (an optical method, an electromagnetic method, an eddy current method, a stress method and the like) has the inevitable inconvenience. The principle of the optical method is simple, however, under the working conditions of high temperature, high speed and sealing, the oil mist generated by the operation of the bearing can block the transmission of light, and the installation of equipment is inconvenient; the electromagnetism principle can cause the roller and the abrasive dust to be magnetized, thereby further intensifying the roller abrasion; the eddy current method has low response speed and is not suitable for high-speed working conditions; the stress method is sensitive to bearing vibration, and the measurement precision is difficult to ensure. In recent years, with the rising of ultrasonic measurement technology, a method for measuring the rotating speed of a rolling bearing roller by using ultrasonic is focused and developed to a certain extent, but a conventional probe for measuring the rolling bearing roller by using ultrasonic is generally not mounted on the bearing, but is selectively mounted on other parts of an engine to transmit ultrasonic waves from other parts to a bearing position in order to ensure the integrity of the bearing.
Disclosure of Invention
The invention provides a rotating speed measuring system for a bearing roller at high speed and high temperature, which is used for solving the technical problem that the conventional system for measuring the rotating speed by ultrasonic waves is inaccurate in measurement.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a rotational speed measurement system for bearing roller under high-speed high temperature, including gathering the subassembly, enlarge and converting circuit and control assembly, gather the subassembly and enlarge and be connected with converting circuit, it is connected with control assembly to enlarge and converting circuit, it is used for transmitting ultrasonic signal to bearing roller to gather the subassembly, receive the echo signal of bearing roller's reflection and send for enlarging and converting circuit, it is used for receiving and enlargies echo signal and analog-to-digital conversion back to enlarge and converting circuit, send for control assembly, control assembly is used for receiving and according to echo signal analysis bearing roller rotational speed when rotating, it installs in the through-hole of bearing frame to gather the subassembly, the through-hole sets up along the tangent line of perpendicular to bearing inner race and the tangential direction of roller, and gather the collection end of subassembly and face bearing roller, and flush with the bearing inner race.
Preferably, the collection assembly is a high-temperature ultrasonic probe, a high-temperature couplant is further coated on the collection end of the high-temperature ultrasonic probe, and the collection end of the high-temperature ultrasonic probe faces the bearing roller and is tightly attached to the bearing outer ring through the high-temperature couplant.
Preferably, the amplifying and converting circuit comprises a high-speed data acquisition circuit and a pulse transmitting and receiving circuit, the high-speed data acquisition circuit is connected with the control assembly, and the high-speed data acquisition circuit, the pulse transmitting and receiving circuit and the acquisition assembly are sequentially connected;
high-speed data acquisition circuit: the pulse transmitting and receiving circuit is used for transmitting a high-frequency pulse signal to the pulse transmitting and receiving circuit, receiving an analog echo signal from the pulse transmitting and receiving circuit, converting the echo signal into a digital echo signal and then transmitting the digital echo signal to the control component;
the pulse transmitting and receiving circuit: the high-frequency ultrasonic probe is used for receiving the high-frequency pulse signal, converting the high-frequency pulse signal into an excitation voltage signal and then sending the excitation voltage signal to the high-temperature ultrasonic probe; receiving the simulated echo signal from the acquisition assembly, amplifying the simulated echo signal and sending the amplified simulated echo signal to a high-speed data acquisition circuit;
the collection assembly: the ultrasonic wave receiving and transmitting circuit is used for receiving an excitation voltage signal, converting the excitation voltage signal into ultrasonic waves, transmitting the ultrasonic waves to the bearing roller, receiving a reflected simulated echo signal of the bearing roller and transmitting the reflected simulated echo signal to the pulse transmitting and receiving circuit.
Preferably, the control assembly comprises an envelope processing module, a Fourier transform module and a rotating speed calculation module which are sequentially connected, and the envelope processing module is also connected with the high-speed data acquisition circuit;
the envelope processing module is used for receiving and carrying out envelope processing on the echo signals acquired by the acquisition assembly, extracting the envelope signals of the echo signals and transmitting the envelope signals to the Fourier transform module;
the Fourier transform module is used for receiving and carrying out fast Fourier transform on the envelope signal to obtain the rotating frequency of the bearing roller and transmitting the rotating frequency of the bearing roller to the rotating speed calculation module;
and the rotating speed calculation module is used for receiving the rotating frequency and calculating the rotating speed of the bearing roller according to a calculation formula between the rotating frequency and the rotating speed.
Preferably, the envelope processing module performs envelope processing on the echo signal acquired by the acquisition component by using the following formula:
Figure BDA0002491781100000031
Xtrepresenting an envelope signal; f. oftRepresenting the echo signal.
Preferably, the fourier transform module performs fast fourier transform on the envelope signal by the following formula:
[fz，az]＝max(fft(Xt))；
fzrepresenting the amplitude of the envelope X of the signal after a fast Fourier transformThe frequency corresponding to the first peak value of the frequency spectrum is the rotating frequency of the bearing roller in the sampling process, and the unit is Hz, azIs the amplitude at that frequency.
Preferably, the calculation formula between the rotation frequency and the rotation speed is:
Figure BDA0002491781100000032
n is the rotating speed of the bearing rollers in the current sampling process, and Z represents the number of the bearing rollers.
Preferably, the control assembly further comprises a monitoring module, wherein the monitoring module is used for calculating the slip ratio of the bearing roller according to the rotating speed, comparing the slip ratio with a preset slip ratio threshold value, and judging that the bearing roller has a slip risk when the slip ratio is greater than the preset slip ratio threshold value.
The invention has the following beneficial effects:
1. according to the rotating speed measuring system for the bearing roller at the high speed and the high temperature, the collecting assembly is arranged in the through hole of the bearing seat perpendicular to the bearing outer ring and the roller, the top end of the collecting assembly is tightly attached to the bearing outer ring, echo signals of the bearing roller can be accurately received under the condition that the integrity of the bearing is ensured and the running state of the bearing is not influenced, the rotating speed of the bearing roller can be analyzed according to the echo signals of the bearing roller, the influence on the working state of other parts is avoided, and the bearing does not need to be subjected to any secondary processing.
2. In the preferred scheme, the precision of the test structure is not excessively sensitive to the influence factors such as bearing rotation, temperature rise and the like by adopting the high-temperature ultrasonic probe and the high-temperature coupling agent;
3. in the preferred embodiment, because of the use of envelope analysis and fast fourier transform, more accurate results can be obtained without the need for excessively high pulse transmission frequencies, and more accurate measurement of the rotational speed can be achieved at the same pulse transmission frequency.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the installation of the collection assembly of the present invention;
FIG. 2 is a data transmission diagram of a rotational speed measurement system for bearing rollers at high speed and high temperature in a preferred embodiment of the present invention;
fig. 3 is a data transmission diagram of a rotational speed measuring system for a bearing roller at a high speed and a high temperature in a preferred embodiment of the present invention.
The figure is marked with: 1. a bearing; 2. a high temperature coupling agent; 3. a high temperature ultrasonic probe; 4. and a bearing seat.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
as shown in fig. 1, the invention discloses a rotation speed measuring system for a bearing roller at high speed and high temperature, which comprises an acquisition component, an amplifying and converting circuit and a control component, wherein the acquisition component is connected with the amplifying and converting circuit, the amplifying and converting circuit is connected with the control component, the acquisition component is used for transmitting ultrasonic signals to the bearing roller, receiving and sending echo signals reflected by the bearing roller to the amplifying and converting circuit, the amplifying and converting circuit is used for receiving and amplifying and performing analog-to-digital conversion on the echo signals and then sending the echo signals to the control component, the control component is used for receiving and analyzing the rotation speed of the bearing roller according to the echo signals, the acquisition component is arranged in a through hole of a bearing seat 4, the through hole is arranged along a tangent line perpendicular to an outer ring of the bearing and a tangent line direction of the roller, and the collection end of the collection assembly faces the bearing roller and is flush with the bearing outer ring.
According to the rotating speed measuring system of the bearing roller, which is used for the bearing 1 at a high speed and a high temperature, the acquisition assembly is arranged in the through hole of the bearing seat 4 which is vertical to the outer ring of the bearing 1 and the roller, and the top end of the acquisition assembly is tightly attached to the outer ring of the bearing 1, so that the echo signal of the bearing roller can be accurately received under the condition that the integrity of the bearing 1 is ensured and the running state of the bearing 1 is not influenced, the rotating speed of the bearing roller can be analyzed according to the echo signal of the bearing roller, the working state of other parts is not influenced, and any secondary processing is not required to be carried out on the bearing 1.
Example two:
the second embodiment is an expanded embodiment of the first embodiment, and is different from the first embodiment in that the specific structure and function of the rotating speed measuring system for the bearing roller at high speed and high temperature are refined.
As shown in fig. 2 to fig. 3, the system for measuring the rotation speed of the bearing roller at a high speed and a high temperature disclosed in this embodiment includes an acquisition component, an amplifying and converting circuit, and a control component, wherein the acquisition component is connected to the amplifying and converting circuit, and the amplifying and converting circuit is connected to the control component.
In this embodiment, the collection subassembly is high temperature ultrasonic probe 3, high temperature ultrasonic probe 3's collection end is still scribbled high temperature couplant 2, and high temperature ultrasonic probe 3's collection end is towards the bearing roller, high temperature ultrasonic probe 3's collection end is through the outer lane of high temperature couplant 2 with bearing 1 and closely laminate, adopts high temperature ultrasonic probe 3 and high temperature couplant 2 to make test structure's precision can not be excessively sensitive to influence factors such as bearing 1 rotation and temperature rise, and reduces the decay of ultrasonic wave when high temperature ultrasonic probe 3 uses, guarantees stability and accurate measurement in the middle of the high temperature environment.
In this embodiment, the amplifying and converting circuit includes a high-speed data acquisition circuit and a pulse transmitting and receiving circuit, the high-speed data acquisition circuit is connected with the control component, and the high-speed data acquisition circuit, the pulse transmitting and receiving circuit and the acquisition component are sequentially connected;
the high-speed data acquisition circuit: the pulse transmitting and receiving circuit is used for transmitting a high-frequency pulse signal to the pulse transmitting and receiving circuit, receiving an analog echo signal transmitted by the pulse transmitting and receiving circuit, converting the echo signal into a digital echo signal and transmitting the digital echo signal to the control component;
the pulse transmitting and receiving circuit: the high-temperature ultrasonic probe is used for receiving the high-frequency pulse signal, converting the high-frequency pulse signal into an excitation voltage signal and then sending the excitation voltage signal to the high-temperature ultrasonic probe 3; receiving the simulated echo signals sent by the acquisition assembly, amplifying the simulated echo signals and sending the amplified simulated echo signals to the high-speed data acquisition circuit;
the collection assembly is: and the pulse transmitting and receiving circuit is used for receiving the excitation voltage signal, converting the excitation voltage signal into ultrasonic waves, transmitting the ultrasonic waves to the bearing roller, receiving and transmitting a reflected and simulated echo signal of the bearing roller to the pulse transmitting and receiving circuit.
In this embodiment, the control assembly comprises an envelope processing module, a fourier transform module, a rotating speed calculation module and a monitoring module which are connected in sequence, and the envelope processing module is further connected with the high-speed data acquisition circuit;
the envelope processing module is used for receiving and carrying out envelope processing on the echo signals acquired by the acquisition assembly, extracting the envelope signals of the echo signals and transmitting the envelope signals to the Fourier transform module;
the envelope processing module carries out envelope processing on the echo signals acquired by the acquisition assembly through the following formula:
Figure BDA0002491781100000061
Xtrepresenting an envelope signal; f. oftRepresenting the echo signal.
The Fourier transform module is used for receiving and carrying out fast Fourier transform on the envelope signal to obtain the rotating frequency of the bearing roller and transmitting the rotating frequency of the bearing roller to the rotating speed calculation module;
wherein the Fourier transform module performs a fast Fourier transform on the envelope signal by:
[fz，az]＝max(fft(Xt))；
fzthe frequency corresponding to the first peak value of the amplitude spectrum obtained after the fast Fourier transform of the signal envelope line X is the rotating frequency of the bearing roller in the sampling process, and the unit is Hz, azIs the amplitude at that frequency.
And the rotating speed calculation module is used for receiving the rotating frequency and calculating the rotating speed of the bearing roller according to a calculation formula between the rotating frequency and the rotating speed.
Wherein, the calculation formula between the rotating frequency and the rotating speed is as follows:
Figure BDA0002491781100000071
n is the rotating speed of the bearing rollers in the current sampling process, and Z represents the number of the bearing rollers.
The monitoring module is used for calculating the slip ratio of the bearing roller according to the rotating speed, comparing the slip ratio with a preset slip ratio threshold value, and judging that the bearing roller has a slip risk when the slip ratio is greater than the preset slip ratio threshold value.
In addition, in a preferable scheme, the monitoring module is further connected with an audible and visual alarm component, and when the bearing roller is judged to have the slipping risk, the monitoring module is further used for giving an alarm through the audible and visual alarm component so as to warn a user.
In this embodiment, the high-speed data acquisition circuit is preferably a high-speed data acquisition card, the pulse transmitting and receiving circuit is preferably a pulse transmitting and receiving card, and the control component is preferably a computer.
The working process of the rotating speed measuring system of the bearing 1 used for the bearing roller under high speed and high temperature in the embodiment is as follows:
setting the frequency of repeatedly transmitting a high-frequency pulse signal by a high-speed data acquisition circuit at a control assembly, setting the amplitude and duty ratio of the pulse signal, and carrying out appropriate sampling setting such as sampling rate, sampling number and the like to start measurement after the setting is finished;
step 2, starting measurement, and repeatedly transmitting a high-frequency pulse signal to a pulse transmitting and receiving circuit by a high-speed data acquisition circuit under the control of computer software;
step 3, the pulse transmitting and receiving circuit converts the received repeated high-frequency pulse signal into an excitation voltage signal and transmits the excitation voltage signal to the high-temperature ultrasonic probe 3;
step 4, the high-temperature ultrasonic probe 3 continuously generates and transmits ultrasonic waves under the action of the excitation voltage signal, and meanwhile, the high-temperature ultrasonic probe 3 receives the reflected sound waves and converts the reflected sound waves into reflected voltage signals, namely echo signals;
step 5, the pulse transmitting and receiving circuit receives the echo signal, amplifies the echo signal and transmits the amplified echo signal to the high-speed data acquisition circuit;
step 6, the high-speed data acquisition circuit receives the echo signal from the pulse transmitting and receiving circuit, converts the echo signal from an analog signal into a digital signal which can be read by a computer, and sends the digital echo signal to the control component;
step 7, the control assembly collects data according to preset sampling setting, and displays, processes and records the data through a written program;
the following describes the process of calculating the rotating speed of the bearing roller:
(1) for the acquired echo signal (f)t) Performing Hilbert (Hilbert) transform envelope processing to obtain an envelope signal (X)t)；
Figure BDA0002491781100000081
(2) Carrying out fast Fourier transform on the envelope signal, and obtaining the roller passing through high-temperature ultrasound at the time from the formula (1)Frequency f of the wave probe 3z(Hz)；
fz＝max(fft(X)) (2)
Figure BDA0002491781100000082
(3) Calculating the real-time rotating speed n (r/min) of the bearing roller by the formula (2);
in the formula (1) fzThe frequency corresponding to the first peak value of the amplitude spectrum obtained after the signal envelope line X is subjected to fast Fourier transform is shown, and the frequency is the frequency of the bearing roller passing through the high-temperature ultrasonic probe 3 in the sampling process; in the formula (2), Z represents the number of bearing rollers.
The high-speed data acquisition circuit, the pulse transmitting and receiving circuit and the high-temperature ultrasonic probe 3 used in the above contents are all devices obtained in the actual exploration process of the development, but the specific real-time mode of the method can be various.
In summary, in the rotating speed measuring system for the bearing roller at high speed and high temperature, the collecting assembly is installed in the through hole of the bearing seat 4 which is perpendicular to the bearing outer ring and the roller, and the top end of the collecting assembly is tightly attached to the bearing outer ring, so that the echo signal of the bearing roller can be accurately received under the condition that the integrity of the bearing 1 is ensured and the running state of the bearing 1 is not influenced, the rotating speed of the bearing roller can be analyzed according to the echo signal of the bearing roller, the working state of other parts is not influenced, and any secondary processing is not required to be performed on the bearing 1.
In the preferred scheme, the high-temperature ultrasonic probe 3 and the high-temperature couplant 2 are adopted, so that the precision of the test structure is not excessively sensitive to the influence factors such as the rotation of the bearing 1, the temperature rise and the like;
in the preferred embodiment, because of the use of envelope analysis and fast fourier transform, more accurate results can be obtained without the need for excessively high pulse transmission frequencies, and more accurate measurement of the rotational speed can be achieved at the same pulse transmission frequency.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A rotating speed measuring system for a bearing roller at high speed and high temperature comprises a collecting assembly, an amplifying and converting circuit and a control assembly, wherein the collecting assembly is connected with the amplifying and converting circuit, the amplifying and converting circuit is connected with the control assembly, the collecting assembly is used for transmitting ultrasonic signals to the bearing roller, receiving echo signals reflected by the bearing roller and sending the echo signals to the amplifying and converting circuit, the amplifying and converting circuit is used for receiving the echo signals, amplifying the echo signals, performing analog-to-digital conversion on the echo signals and sending the amplified echo signals to the control assembly, the control assembly is used for receiving and analyzing the rotating speed of the bearing roller during rotation according to the echo signals, and the rotating speed measuring system is characterized in that the collecting assembly is arranged in a through hole of a bearing seat, the through hole is arranged along the direction perpendicular to the tangent line of the outer ring of the bearing and the tangent line, and the collection end of the collection assembly faces the bearing roller and is flush with the bearing outer ring.
2. The system for measuring the rotating speed of the bearing roller at high speed and high temperature according to claim 1, wherein the collection assembly is a high-temperature ultrasonic probe, a high-temperature couplant is further coated on a collection end of the high-temperature ultrasonic probe, and the collection end of the high-temperature ultrasonic probe faces the bearing roller and is tightly attached to a bearing outer ring through the high-temperature couplant.
3. The system for measuring the rotating speed of the bearing roller at high speed and high temperature according to claim 2, wherein the amplifying and converting circuit comprises a high-speed data acquisition circuit and a pulse transmitting and receiving circuit, the high-speed data acquisition circuit is connected with the control component, and the high-speed data acquisition circuit, the pulse transmitting and receiving circuit and the acquisition component are sequentially connected;
the high-speed data acquisition circuit: the pulse transmitting and receiving circuit is used for transmitting a high-frequency pulse signal to the pulse transmitting and receiving circuit, receiving an analog echo signal from the pulse transmitting and receiving circuit, converting the echo signal into a digital echo signal and then transmitting the digital echo signal to the control component;
the pulse transmitting and receiving circuit: the high-temperature ultrasonic probe is used for receiving the high-frequency pulse signal, converting the high-frequency pulse signal into an excitation voltage signal and then sending the excitation voltage signal to the high-temperature ultrasonic probe; receiving a simulated echo signal from the acquisition assembly, amplifying the simulated echo signal, and sending the amplified simulated echo signal to the high-speed data acquisition circuit;
the collection assembly is: and the pulse transmitting and receiving circuit is used for receiving the excitation voltage signal, converting the excitation voltage signal into ultrasonic waves, transmitting the ultrasonic waves to the bearing roller, receiving a reflected simulated echo signal of the bearing roller and transmitting the reflected simulated echo signal to the pulse transmitting and receiving circuit.
4. The system for measuring the rotating speed of the bearing roller at high speed and high temperature according to claim 3, wherein the control assembly comprises an envelope processing module, a Fourier transform module and a rotating speed calculation module which are connected in sequence, and the envelope processing module is further connected with the high speed data acquisition circuit;
the envelope processing module is used for receiving and carrying out envelope processing on the echo signals acquired by the acquisition assembly, extracting the envelope signals of the echo signals and transmitting the envelope signals to the Fourier transform module;
the Fourier transform module is used for receiving and carrying out fast Fourier transform on the envelope signal to obtain the rotating frequency of the bearing roller and transmitting the rotating frequency of the bearing roller to the rotating speed calculation module;
and the rotating speed calculation module is used for receiving the rotating frequency and calculating the rotating speed of the bearing roller according to a calculation formula between the rotating frequency and the rotating speed.
5. The system for measuring the rotating speed of the bearing roller at high speed and high temperature according to claim 4, wherein the envelope processing module carries out envelope processing on the echo signals acquired by the acquisition assembly through the following formula:
Figure FDA0002491781090000021
Xtrepresenting an envelope signal; f. oftRepresenting the echo signal.
6. A speed of rotation measurement system for bearing rollers at high speed and high temperature according to claim 5, wherein the Fourier transform module performs fast Fourier transform on the envelope signal by the following formula:
[fz，az]＝max(fft(Xt))；
fzthe frequency corresponding to the first peak value of the amplitude spectrum obtained after the fast Fourier transform of the signal envelope line X is the rotating frequency of the bearing roller in the sampling process, and the unit is Hz, azIs the amplitude at that frequency.
7. The system of claim 6, wherein the formula for calculating the rotational frequency and the rotational speed is:
Figure FDA0002491781090000022
n is the rotating speed of the bearing rollers in the current sampling process, and Z represents the number of the bearing rollers.
8. The system according to any one of claims 1 to 7, wherein the control module further comprises a monitoring module, the monitoring module is configured to calculate a slip ratio of the bearing roller according to the rotation speed, compare the slip ratio with a preset slip ratio threshold value, and determine that the bearing roller is at a slip risk when the slip ratio is greater than the preset slip ratio threshold value.
CN202010407282.2A 2020-05-14 2020-05-14 Rotating speed measuring system for bearing roller at high speed and high temperature Pending CN111443215A (en)

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CN113063593A (en) * 2021-03-15 2021-07-02 西安交通大学 Rolling bearing signal characteristic information acquisition method based on ultrasonic echo energy coefficient
CN114563589A (en) * 2022-03-04 2022-05-31 北京女娲补天科技信息技术有限公司 Method and device for measuring object rotation angular velocity based on sound directivity

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CN109752185A (en) * 2019-01-24 2019-05-14 长安大学 A kind of measurement method for rolling bearing roller or so skew oscillation state

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113063593A (en) * 2021-03-15 2021-07-02 西安交通大学 Rolling bearing signal characteristic information acquisition method based on ultrasonic echo energy coefficient
CN114563589A (en) * 2022-03-04 2022-05-31 北京女娲补天科技信息技术有限公司 Method and device for measuring object rotation angular velocity based on sound directivity

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