CN203643169U - Intelligent bearing monitoring device based on transient speeds - Google Patents

Abstract

The utility model relates to an intelligent bearing monitoring device based on transient speeds. The intelligent bearing monitoring device is capable of realizing signal conditioning and signal output of two-path rotating speed sensor signals, two-path temperature sensor signals and one-path three-axis vibration acceleration signals. +/- 12V direct-current power is supplied to an integrated signal conditioning circuit board by an external power supply. Hall sensors are adopted for rotating speed measurement. An integrated circuit is used to supply power to the Hall sensors and carry out signal conditioning on the Hall sensors, 5V high-voltage and 0V low-voltage level digital pulse signals are output, the pulse signals are collected by a collecting instrument, and then the real time rotating speed is calculated by software. 3.3V direct-current power is supplied to a three-axis vibration acceleration sensor circuit board by the integrated signal conditioning circuit board, 0-3.3V analog voltage signals are output after the power supply filtering of the acceleration sensor circuit board and output signal low-pass filtering, and the analog voltage signals are linearly corresponding to the measuring range of an acceleration sensor. In this way, real-time conditioning and monitoring towards rotating speed dynamic parameters, temperature dynamic parameters and vibration acceleration dynamic parameters are realized.

Description

Intelligent bearing monitoring device based on transition speed

Technical field

The utility model relates to mechanical automation field, relates in particular to a kind of intelligent bearing monitoring device based on transition speed.

Background technology

Bullet train and urban track traffic are the symbols of national sophisticated technologies, and its reliability and security are directly connected to the people's the person and property safety and national image.Intelligent bearing has been broken through traditional bearing condition monitoring diagnostic mode, is a gordian technique that is applied to bullet train, and technique is abroad monopolized and blocks at present, therefore studies intelligent bearing and has great society and economic worth.And the concept of intelligent bearing is exactly integrated multiple sensors, realize Real-Time Monitoring and the fault diagnosis of the various dynamic parameters to bearing.And the original signal of compound sensor might not be all conventional normal voltage or current signal, after needing circuit board to nurse one's health conversion, just can be input to acquisition instrument collection, further realize demonstration, monitoring, analysis and the storage to intelligent bearing real-time status.

In bearing operation process, the variation of operating mode and load, can cause rotational speed to occur fluctuation to a certain degree.Traditional time-sampling mode is closely related the statistical nature of signal and time, once there is fluctuation in rotating speed, these statistical natures also can change in time, and the time domain vibration signal that consequently collects bearing can be a non-stationary signal, has increased the difficulty of bearing condition monitoring.Therefore be necessary that the tranquilization that realizes non-stationary signal changes, although the existing smooth conversion that has realized signal based on scrambler and the equiangular sampling mode based on velocity gauge, but the former sample frequency is fixed and is lower, the latter's conversion accuracy is lower, and the installation of the two collecting device all has larger limitation, be unfavorable for practical application.

Utility model content

The utility model is intended at least solve the technical matters existing in prior art, has proposed to special innovation a kind of intelligent bearing monitoring device based on transition speed.

In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of intelligent bearing monitoring device based on transition speed, its key is, comprise acceleration sensor circuit, two Hall elements, two temperature sensors, signal conditioning circuit, steel spacer ring, magnet steel and dust caps

Described acceleration sensor circuit connects respectively computer terminal and signal conditioning circuit, described Hall element connects signal conditioning circuit tachometric survey input end, described signal conditioning circuit tachometric survey output terminal connects computer terminal, described temperature sensor connects described signal conditioning circuit temperature transition input end, and described signal conditioning circuit temperature transition output terminal connects computer terminal;

Between two Hall elements, central angle is 90 °, two temperature sensors are also arranged symmetrically in the both sides of acceleration transducer, central angle between described two temperature sensors is less than 90 °, described two temperature sensors are arranged between described two Hall elements, described acceleration transducer is arranged between described two temperature sensors, described two Hall elements, two temperature sensors and acceleration transducer are installed on dust cap, on described steel spacer ring circumference, be evenly arranged magnet steel, described steel spacer ring is fixed on bearing, bearing drives described steel spacer ring motion, described dust cap capping steel spacer ring, described dust cap maintains static with respect to steel spacer ring.

The described intelligent bearing monitoring device based on transition speed, preferred, described acceleration sensor circuit comprises: acceleration transducer, the first resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity;

Described first resistance one end connects acceleration transducer, the described first resistance other end connects signal conditioning circuit, described first electric capacity one end connects respectively signal conditioning circuit, second electric capacity one end, the 3rd electric capacity one end and acceleration transducer COM end, the described first electric capacity other end connects acceleration transducer X-axis output terminal, described second electric capacity one end also connects signal conditioning circuit, the 3rd electric capacity one end and acceleration transducer COM end, the described second electric capacity other end connects acceleration transducer Y-axis output terminal, described the 3rd electric capacity one end also connects signal conditioning circuit and acceleration transducer COM end, described the 4th electric capacity one end connects respectively first resistance one end and the 5th electric capacity one end, described the 4th electric capacity other end connects described the 5th electric capacity other end, described the 5th electric capacity other end connects described acceleration transducer.

The described intelligent bearing monitoring device based on transition speed, preferably, described acceleration sensor circuit also comprises acceleration transducer power supply unit, described acceleration transducer power supply unit one end connects DC power supply, and the described acceleration transducer power supply unit other end connects acceleration transducer.

The described intelligent bearing monitoring device based on transition speed, preferred, described acceleration transducer power supply unit comprises: the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, DC power supply unit, voltage regulation unit and acceleration transducer power supply chip,

Described the 6th electric capacity one end connects respectively DC power supply unit earth terminal and voltage regulation unit earth terminal, described the 6th electric capacity other end connects voltage regulation unit and DC power supply cell voltage output terminal, described the 7th electric capacity one end connects voltage regulation unit earth terminal, described the 7th electric capacity other end connects voltage regulation unit output terminal and acceleration transducer power supply chip voltage output end, described the 8th electric capacity one end connects voltage regulation unit earth terminal, and described the 8th electric capacity other end connects acceleration transducer power supply chip voltage output end.

The described intelligent bearing monitoring device based on transition speed, preferred, described signal conditioning circuit comprises: rotation speed measuring module and temperature transition module,

Described rotation speed measuring module connects respectively two Hall elements, by Hall element, bearing rotary speed information is sent to rotation speed measuring module, described rotation speed measuring module connects computer terminal, described temperature transition module connects respectively two temperature sensors, by temperature sensor, bearing temperature information is sent to temperature transition module, temperature inversion module connects computer terminal.

The described intelligent bearing monitoring device based on transition speed, preferably, described rotation speed measuring module comprises: the first Hall switch, the second Hall switch, the second resistance, the 3rd resistance, the 9th electric capacity, the tenth electric capacity, rotating speed output unit, the second voltage regulation unit and DC power supply unit;

Described the first Hall switch voltage end connects the 3rd resistance one end, described the first Hall switch output terminal connects the 3rd resistance other end, described the 3rd resistance other end also connects respectively the 9th electric capacity one end and rotating speed output unit, described the 9th electric capacity other end ground connection, described the first Hall switch voltage end also connects the second Hall switch voltage end and the second voltage regulation unit voltage output end, described the second Hall switch voltage end also connects second resistance one end, the described second resistance other end connects respectively the second Hall switch output terminal and the tenth electric capacity one end, described the tenth electric capacity other end ground connection, described the second voltage regulation unit voltage input end connects described DC power supply cell voltage output terminal.

The described intelligent bearing monitoring device based on transition speed, preferably, described temperature transition module comprises: the first operational amplifier, the second operational amplifier, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, diode, temperature output unit and temperature sensor input block;

Described temperature output unit connects the 15 resistance one end and diode cathode, described the 15 resistance other end connects respectively the 14 resistance one end and the first operational amplifier output terminal, described diode cathode connects respectively the first operational amplifier electrode input end and the second operational amplifier electrode input end, described the 14 resistance other end connects the first operational amplifier negative input, described the 14 resistance other end also connects respectively the 12 resistance one end and the 13 resistance one end, described the 12 resistance other end connects respectively the 11 resistance one end and DC power supply cell voltage output terminal, described the 11 resistance other end connects temperature sensor input block, described the second operational amplifier output terminal connects temperature sensor input block.

In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:

The utility model is by the collar of fixed band magnet steel outside the outer panel of existing steel spacer ring, on the outer ring of bearing, fix dust cover, and in dust cover, fix corresponding sensor, thereby a kind of simple in structure bearing monitoring device that comprises compound sensor is provided, has realized real-time conditioning and monitoring to rotating speed, temperature and three kinds of dynamic parameters of vibration acceleration.

Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.

Brief description of the drawings

Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:

Fig. 1 is the intelligent bearing monitoring device schematic diagram of the utility model based on transition speed;

Fig. 2 is the intelligent bearing monitoring device temperature resistance curve figure of the utility model based on transition speed;

Fig. 3 is the intelligent bearing monitoring device respective sensor position view of the utility model based on transition speed;

Fig. 4 is the intelligent bearing monitoring device dust cap schematic diagram of the utility model based on transition speed;

Fig. 5 is the intelligent bearing monitoring device steel spacer ring schematic diagram of the utility model based on transition speed;

Fig. 6 is the intelligent bearing monitoring method process flow diagram of the utility model based on transition speed;

Fig. 7 is the intelligent bearing monitoring device acceleration sensor circuit schematic diagram of the utility model based on transition speed;

Fig. 8 is the intelligent bearing monitoring device acceleration transducer power supply chip schematic diagram of the utility model based on transition speed;

Fig. 9 is the intelligent bearing monitoring device rotation speed measuring module schematic diagram of the utility model based on transition speed;

Figure 10 is the intelligent bearing monitoring device temperature transition module diagram of the utility model based on transition speed.

Embodiment

Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.

In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.

As shown in Figure 1, the utility model provides a kind of intelligent bearing monitoring device based on transition speed, its key is, comprises acceleration sensor circuit, two Hall elements, two temperature sensors, signal conditioning circuit, steel spacer ring, magnet steel and dust caps

Described acceleration sensor circuit connects respectively computer terminal and signal conditioning circuit, described Hall element connects signal conditioning circuit tachometric survey input end, described signal conditioning circuit tachometric survey output terminal connects computer terminal, described temperature sensor connects described signal conditioning circuit temperature transition input end, and described signal conditioning circuit temperature transition output terminal connects computer terminal;

Between two Hall elements, central angle is 90 °, two temperature sensors are also arranged symmetrically in the both sides of acceleration transducer, central angle between described two temperature sensors is less than 90 °, described two temperature sensors are arranged between described two Hall elements, described acceleration transducer is arranged between described two temperature sensors, described two Hall elements, two temperature sensors and acceleration transducer are installed on dust cap, on described steel spacer ring circumference, be evenly arranged magnet steel, described steel spacer ring is fixed on bearing, bearing drives described steel spacer ring motion, described dust cap capping steel spacer ring, described dust cap maintains static with respect to steel spacer ring.

As shown in Figure 7, the described intelligent bearing monitoring device based on transition speed, preferred, described acceleration sensor circuit comprises: acceleration transducer, the first resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity;

Described first resistance one end connects acceleration transducer, the described first resistance other end connects signal conditioning circuit, described first electric capacity one end connects respectively signal conditioning circuit, second electric capacity one end, the 3rd electric capacity one end and acceleration transducer COM end, the described first electric capacity other end connects acceleration transducer X-axis output terminal, described second electric capacity one end also connects signal conditioning circuit, the 3rd electric capacity one end and acceleration transducer COM end, the described second electric capacity other end connects acceleration transducer Y-axis output terminal, described the 3rd electric capacity one end also connects signal conditioning circuit and acceleration transducer COM end, described the 4th electric capacity one end connects respectively first resistance one end and the 5th electric capacity one end, described the 4th electric capacity other end connects described the 5th electric capacity other end, described the 5th electric capacity other end connects described acceleration transducer.

The described intelligent bearing monitoring device based on transition speed, preferably, described acceleration sensor circuit also comprises acceleration transducer power supply unit, described acceleration transducer power supply unit one end connects DC power supply, and the described acceleration transducer power supply unit other end connects acceleration transducer.

Its physical circuit as shown in Figure 8, the described intelligent bearing monitoring device based on transition speed, preferably, described acceleration transducer power supply unit comprises: the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, DC power supply unit, voltage regulation unit and acceleration transducer power supply chip

Described the 6th electric capacity one end connects respectively DC power supply unit earth terminal and voltage regulation unit earth terminal, described the 6th electric capacity other end connects voltage regulation unit and DC power supply cell voltage output terminal, described the 7th electric capacity one end connects voltage regulation unit earth terminal, described the 7th electric capacity other end connects voltage regulation unit output terminal and acceleration transducer power supply chip voltage output end, described the 8th electric capacity one end connects voltage regulation unit earth terminal, and described the 8th electric capacity other end connects acceleration transducer power supply chip voltage output end.

The described intelligent bearing monitoring device based on transition speed, preferred, described signal conditioning circuit comprises: rotation speed measuring module and temperature transition module,

Described rotation speed measuring module connects respectively two Hall elements, by Hall element, bearing rotary speed information is sent to rotation speed measuring module, described rotation speed measuring module connects computer terminal, described temperature transition module connects respectively two temperature sensors, by temperature sensor, bearing temperature information is sent to temperature transition module, temperature inversion module connects computer terminal.

As shown in Figure 9, the described intelligent bearing monitoring device based on transition speed, preferably, described rotation speed measuring module comprises: the first Hall switch, the second Hall switch, the second resistance, the 3rd resistance, the 9th electric capacity, the tenth electric capacity, rotating speed output unit, the second voltage regulation unit and DC power supply unit, described the first Hall switch voltage end connects the 3rd resistance one end, described the first Hall switch output terminal connects the 3rd resistance other end, described the 3rd resistance other end also connects respectively the 9th electric capacity one end and rotating speed output unit, described the 9th electric capacity other end ground connection, described the first Hall switch voltage end also connects the second Hall switch voltage end and the second voltage regulation unit voltage output end, described the second Hall switch voltage end also connects second resistance one end, the described second resistance other end connects respectively the second Hall switch output terminal and the tenth electric capacity one end, described the tenth electric capacity other end ground connection, described the second voltage regulation unit voltage input end connects described DC power supply cell voltage output terminal.

As shown in figure 10, the described intelligent bearing monitoring device based on transition speed, preferably, described temperature transition module comprises: the first operational amplifier, the second operational amplifier, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, diode, temperature output unit and temperature sensor input block;

Described temperature output unit connects the 15 resistance one end and diode cathode, described the 15 resistance other end connects respectively the 14 resistance one end and the first operational amplifier output terminal, described diode cathode connects respectively the first operational amplifier electrode input end and the second operational amplifier electrode input end, described the 14 resistance other end connects the first operational amplifier negative input, described the 14 resistance other end also connects respectively the 12 resistance one end and the 13 resistance one end, described the 12 resistance other end connects respectively the 11 resistance one end and DC power supply cell voltage output terminal, described the 11 resistance other end connects temperature sensor input block, described the second operational amplifier output terminal connects temperature sensor input block.

Two circuit boards are double-layer PCB board, and selected electronic devices and components are paster encapsulation, realize miniaturization, the lightness of circuit board.Wherein integrated signal modulate circuit plate length and width are 40mm*30mm, thickness 1.6mm, vibration acceleration sensor circuit board length and width 10mm*9.5mm, thickness 0.8mm.

Tachometric survey is realized by Hall element.Integrated signal modulate circuit plate uses 78L05 triode that ﹢ 12V voltage transformation is powered to Hall element for ﹢ 5V voltage.The two-way input of Hall element is respectively H1IN and H2IN, and two-way Hall output port is respectively H1OUT and H2OUT.Hall element has three pins to be respectively VCC, GND and OUT, wherein between VCC and OUT, be connected in series a resistance, OUT output terminal acquiescence output signal is ﹢ 5V high level, in the time that the South Pole that Hall element is subject to being arranged on the magnet steel on rotor affects, make the low level pulse signal of output terminal OUT output 0V by the principle of work of Hall element.Pulse signal just calculates real-time rotate speed to the quantity of Hall element by software according to the magnet steel South Pole after acquisition instrument gathers.For weakening the interference of digital pulse signal to acceleration, temperature analog signal, the utility model is taked digitally and is separated in analog ground connection, back of circuit board cover copper with subregion digitally in analog.

Temperature survey is realized by PT100 platinum sensor.Press IEC751 international standard, Pt100(R ₀=100 Ω) temperature coefficient TCR=0.003851, R _tresistance value TCR=(the R of Pt100 while referring to t degree Celsius ₁₀₀-R ₀)/(R ₀× 100).

As shown in Figure 2, relationship is as follows for PT100 resistance value curve corresponding to temperature:

-200<t<0℃R _t=R ₀[1+At+Bt ²+C(t-100)t ³]，0<t<850℃R _t=R ₀（1+At+Bt ²）

Two-way PT100 platinum resistance temperature sensor chip accesses respectively T1IN and T2IN port, the resistance signal of two-way platinum resistance temperature sensor is enlarged into respectively the analog voltage signal of standard by two operational amplifier OP2177 conversions, wherein OP2177 operational amplifier is by provide ± 12V of external power source direct supply.Adjust enlargement factor and output voltage range according to required range ability by the resistance in circuit board, the utility model range is-50 DEG C to 300 DEG C, corresponding Voltage-output is about 0 to 5V analog voltage signal, and the output of two-way temperature is respectively T1OUT and T2OUT port.And measured temperature and voltage output value are linear relationship, concrete corresponding relation formula is determined after need demarcating circuit board.When input resistance compared with large or while opening circuit corresponding output voltage also raise and exceed 5V; for making voltage signal that acquisition instrument the gathers voltage bearing value lower than acquisition instrument, in the safe handling of a voltage-regulator diode protection collecting device of temperature voltage signal output termination.The utility model adopts the 5V zener diode of 1N4733.

Vibration acceleration is realized by three shaft vibration acceleration transducer ADXL326, and range is ± 16g.Three shaft vibration acceleration sensor circuit plates are the direct current for 3.3V by integrated signal modulate circuit plate, after acceleration sensor circuit plate decoupling capacitor filter out power ripple, 3-axis acceleration chip ADXL326 is powered, the X/Y/Z tri-road vibration acceleration signals of 3-axis acceleration chip are exported the analog voltage signal of 0-3.3V separately after selected electric capacity low-pass filtering.The bandwidth range of X-axis and Y-axis is 0.5Hz to 1600Hz, and the bandwidth range of Z axis is 0.5Hz to 550Hz, can be according to the suitable bandwidth of application choice, and bandwidth is by low-pass filtering capacitance settings, bandwidth f _{– 3dB}=5 μ F/C, capacitor C unit is μ F.Output analog voltage linearity is corresponding to the range of acceleration transducer.The sensitivity of 3-axis acceleration chip ADXL326 need to be determined according to supply voltage value, representative value when 3V power supply is 57mV/g, the utility model power supply is 3.3V, and theoretical value is about 62.7mV/g, when practical application, revises for raising precision need to be used standard vibration acceleration to revise instrument.

As shown in Figure 3,4, in order to make collecting device more be convenient to install, propose collecting device to be installed to bearing inside, not only sensing element from bearing internal part more close to, also saved the trouble that equipment is installed, specifically as shown in Figure 5 simultaneously.On the steel spacer ring rotating with bearing, have 8 magnet steel, 45 °, interval degree, is circumferentially being divided into bearing 8 regions thus respectively.Dust cap upper bottom portion has a Hall element, when steel spacer ring rotates with bearing is, in the time of magnet steel process Hall element, will produce a pulse, and bearing rotates a circle and produces 8 pulses.

As shown in Figure 6, the concrete workflow of the utility model is following method, and its key is, comprises the steps:

Step 1, circumferentially steel spacer ring is evenly divided into some regions even mounting magnetic steel, dust cap upper bottom portion is installed Hall element, in the time that steel spacer ring rotates with bearing, in the time that the each magnet steel on steel spacer ring passes through Hall element, Hall element produces a pulse;

Step 2, obtains the mistiming between described any two adjacent pulses by described Hall element, obtains the transient speed of bearing in each region;

Step 3, gathers the each region of bearing at time-domain signal by acceleration transducer, and the signal in each region is carried out to impartial interpolation, so that the signal length in each region is consistent, obtains time domain stationary signal;

Step 4, transient speed according to described bearing in each region, obtain in each region not the corner of bearing relation over time in the same time, determine time point corresponding to given bearing angle position according to described variation relation, according to described time point, the time-domain signal gathering is carried out to interpolation resampling, just obtained having the angular domain stationary signal at stable interval.

According to the transient speed in the each region of bearing, the vibration time-domain signal gathering is carried out to interpolation resampling, thereby realize the tranquilization of vibration signal in angular domain on the one hand; The time-domain signal length gathering according to the each region of bearing on the other hand, carries out impartial interpolation to the signal in each region, so that the signal length in each region is consistent, realizes tranquilization in time domain.A magnet steel will produce a pulse through Hall element, bearing rotates a circle and produces 8 pulses, when Hall element starts image data, acceleration transducer also starts to gather, we can obtain the during this period of time instantaneous angular velocity of bearing by the mistiming between any two pulses, also obtained the markers of the vibration signal equiangular sampling between these two pulses simultaneously, thereby obtain the moment sequence of equiangular sampling, now vibration signal is carried out to equal angles resampling, just obtain having the equal angles vibration signal at stable interval, improve the monitoring accuracy of intelligent bearing.

Detailed process is as described below:

1) time domain stationary signal

The time-domain signal X being gathered by acceleration transducer, has two kinds of expression-forms, and as the formula (1), the latter divides by bearing region the former, and both essence are the same.

$X=\{{\mathrm{<figure-callout\; id="1"\; label="x\; t"\; filenames="HDA0000441514820000031.png,HDA0000441514820000032.png"\; state="\{\{state\}\}">x</figure-callout>}}_{t_{}},{\mathrm{<figure-callout\; id="2"\; label="x\; t"\; filenames="HDA0000441514820000031.png,HDA0000441514820000032.png"\; state="\{\{state\}\}">x</figure-callout>}}_{t_{}},...,x_{t_N}\}$ Or $X=\left\{\begin{array}{c}{x}_{{\mathrm{it}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{it}}_A}\\ ...\\ ...\\ ...\\ x_{{\mathrm{<figure-callout\; id="1"\; label="jt"\; filenames="HDA0000441514820000031.png,HDA0000441514820000032.png"\; state="\{\{state\}\}">jt</figure-callout>}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{jt}}_B}\end{array}\right\}---\left(1\right)$

X: time-domain signal; N: time-domain signal length; I, j: bearing region sequence number; A, B: time-domain signal length in single region;

Due to the fluctuation of bearing rotating speed, in a circle, the time that bearing rotary is crossed each region is different, and time-domain sampling frequency F _stremain unchanged, the data length gathering in each region can be different, or A, or B, or other.Get signal length maximal value in All Ranges, i.e. S, carries out impartial interpolation to the time-domain signal in each region accordingly, makes the each regional signal length after interpolation be S, can obtain thus time domain vibration signal Y relatively stably.

$Y=\left\{\begin{array}{c}{x}_{{\mathrm{it}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{it}}_S}\\ ...\\ ...\\ ...\\ x_{{\mathrm{<figure-callout\; id="1"\; label="jt"\; filenames="HDA0000441514820000031.png,HDA0000441514820000032.png"\; state="\{\{state\}\}">jt</figure-callout>}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{jt}}_S}\end{array}\right\}---\left(2\right)$

2) angular domain stationary signal

According to the interpulse time interval can be by formula

$Y=\left\{\begin{array}{c}{x}_{{\mathrm{it}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{it}}_S}\\ ...\\ ...\\ ...\\ x_{{\mathrm{<figure-callout\; id="1"\; label="jt"\; filenames="HDA0000441514820000031.png,HDA0000441514820000032.png"\; state="\{\{state\}\}">jt</figure-callout>}}_1},x_{{\mathrm{it}}_2},...,x_{{\mathrm{jt}}_S}\end{array}\right\}$ Calculate the transient speed of bearing in each region, this than traditionally by bearing the rotating speed within a circle to be considered as constant precision higher.

R _inst: transient speed;

: interregional angle intervals, 45 °; Δ t _i: the time that turns over each region; I: region sequence number

According to the bearing transient speed R obtaining _inst, the rotational angle theta of bearing (t) relational expression over time in the same time not in the each region that can calculate,

θ(t)＝R _inst·t （4）

θ (t): bearing corner; T: rotation time;

Can calculate given time point corresponding to position of delivering by θ (t), suppose that angular domain sample frequency is F _{s θ}, angular domain sampling interval Δ θ,

$\mathrm{\&Delta;\&theta;}=\frac{1}{F_{\mathrm{S\&theta;}}}---\left(5\right)$

Δ θ: angular domain sampling interval; F _{s θ}: angular domain sample frequency;

For given bearing angle position θ _n, can calculate corresponding time point t _n,

θ _n＝n·Δθ （6）

N: angular domain data sequence number; θ _n: bearing angle position; t _n: the time of corresponding certain angle position;

Again according to t _ncan carry out interpolation resampling to the time-domain signal gathering, and then can obtain angular domain vibration signal Z stably.

$Z=\{x_{{\mathrm{\&theta;}}_1},x_{{\mathrm{\&theta;}}_2},...,x_{{\mathrm{\&theta;}}_M}\}---\left(7\right)$

M: angular domain signal length

The beneficial effects of the utility model are:

The utility model is by the collar of fixed band magnet steel outside the outer panel of existing steel spacer ring, on the outer ring of bearing, fix dust cover, and in dust cover, fix corresponding sensor, thereby a kind of simple in structure bearing monitoring device that comprises compound sensor is provided, has realized real-time conditioning and monitoring to rotating speed, temperature and three kinds of dynamic parameters of vibration acceleration.

In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.

Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.

Claims (7)

1. the intelligent bearing monitoring device based on transition speed, is characterized in that, comprises acceleration sensor circuit, two Hall elements, two temperature sensors, signal conditioning circuit, steel spacer ring, magnet steel and dust caps,

Described acceleration sensor circuit connects respectively computer terminal and signal conditioning circuit, described Hall element connects signal conditioning circuit tachometric survey input end, described signal conditioning circuit tachometric survey output terminal connects computer terminal, described temperature sensor connects described signal conditioning circuit temperature transition input end, and described signal conditioning circuit temperature transition output terminal connects computer terminal;

Between two Hall elements, central angle is 90 °, two temperature sensors are also arranged symmetrically in the both sides of acceleration transducer, central angle between described two temperature sensors is less than 90 °, described two temperature sensors are arranged between described two Hall elements, described acceleration transducer is arranged between described two temperature sensors, described two Hall elements, two temperature sensors and acceleration transducer are installed on dust cap, on described steel spacer ring circumference, be evenly arranged magnet steel, described steel spacer ring is fixed on bearing, bearing drives described steel spacer ring motion, described dust cap capping steel spacer ring, described dust cap maintains static with respect to steel spacer ring.

2. the intelligent bearing monitoring device based on transition speed according to claim 1, it is characterized in that, described acceleration sensor circuit comprises: acceleration transducer, the first resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity;

Described first resistance one end connects acceleration transducer, the described first resistance other end connects signal conditioning circuit, described first electric capacity one end connects respectively signal conditioning circuit, second electric capacity one end, the 3rd electric capacity one end and acceleration transducer COM end, the described first electric capacity other end connects acceleration transducer X-axis output terminal, described second electric capacity one end also connects signal conditioning circuit, the 3rd electric capacity one end and acceleration transducer COM end, the described second electric capacity other end connects acceleration transducer Y-axis output terminal, described the 3rd electric capacity one end also connects signal conditioning circuit and acceleration transducer COM end, described the 4th electric capacity one end connects respectively first resistance one end and the 5th electric capacity one end, described the 4th electric capacity other end connects described the 5th electric capacity other end, described the 5th electric capacity other end connects described acceleration transducer.

3. the intelligent bearing monitoring device based on transition speed according to claim 2, it is characterized in that, described acceleration sensor circuit also comprises acceleration transducer power supply unit, described acceleration transducer power supply unit one end connects DC power supply, and the described acceleration transducer power supply unit other end connects acceleration transducer.

4. the intelligent bearing monitoring device based on transition speed according to claim 3, it is characterized in that, described acceleration transducer power supply unit comprises: the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, DC power supply unit, voltage regulation unit and acceleration transducer power supply chip

Described the 6th electric capacity one end connects respectively DC power supply unit earth terminal and voltage regulation unit earth terminal, described the 6th electric capacity other end connects voltage regulation unit and DC power supply cell voltage output terminal, described the 7th electric capacity one end connects voltage regulation unit earth terminal, described the 7th electric capacity other end connects voltage regulation unit output terminal and acceleration transducer power supply chip voltage output end, described the 8th electric capacity one end connects voltage regulation unit earth terminal, and described the 8th electric capacity other end connects acceleration transducer power supply chip voltage output end.

5. the intelligent bearing monitoring device based on transition speed according to claim 1, is characterized in that, described signal conditioning circuit comprises: rotation speed measuring module and temperature transition module,

Described rotation speed measuring module connects respectively two Hall elements, by Hall element, bearing rotary speed information is sent to rotation speed measuring module, described rotation speed measuring module connects computer terminal, described temperature transition module connects respectively two temperature sensors, by temperature sensor, bearing temperature information is sent to temperature transition module, temperature inversion module connects computer terminal.

6. the intelligent bearing monitoring device based on transition speed according to claim 5, it is characterized in that, described rotation speed measuring module comprises: the first Hall switch, the second Hall switch, the second resistance, the 3rd resistance, the 9th electric capacity, the tenth electric capacity, rotating speed output unit, the second voltage regulation unit and DC power supply unit;

Described the first Hall switch voltage end connects the 3rd resistance one end, described the first Hall switch output terminal connects the 3rd resistance other end, described the 3rd resistance other end also connects respectively the 9th electric capacity one end and rotating speed output unit, described the 9th electric capacity other end ground connection, described the first Hall switch voltage end also connects the second Hall switch voltage end and the second voltage regulation unit voltage output end, described the second Hall switch voltage end also connects second resistance one end, the described second resistance other end connects respectively the second Hall switch output terminal and the tenth electric capacity one end, described the tenth electric capacity other end ground connection, described the second voltage regulation unit voltage input end connects described DC power supply cell voltage output terminal.

7. the intelligent bearing monitoring device based on transition speed according to claim 5, it is characterized in that, described temperature transition module comprises: the first operational amplifier, the second operational amplifier, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, diode, temperature output unit and temperature sensor input block;

Described temperature output unit connects the 15 resistance one end and diode cathode, described the 15 resistance other end connects respectively the 14 resistance one end and the first operational amplifier output terminal, described diode cathode connects respectively the first operational amplifier electrode input end and the second operational amplifier electrode input end, described the 14 resistance other end connects the first operational amplifier negative input, described the 14 resistance other end also connects respectively the 12 resistance one end and the 13 resistance one end, described the 12 resistance other end connects respectively the 11 resistance one end and DC power supply cell voltage output terminal, described the 11 resistance other end connects temperature sensor input block, described the second operational amplifier output terminal connects temperature sensor input block.

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