CN208313571U - A kind of detection of high speed grounding switch mechanical property and fitting device - Google Patents
A kind of detection of high speed grounding switch mechanical property and fitting device Download PDFInfo
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- CN208313571U CN208313571U CN201820854201.1U CN201820854201U CN208313571U CN 208313571 U CN208313571 U CN 208313571U CN 201820854201 U CN201820854201 U CN 201820854201U CN 208313571 U CN208313571 U CN 208313571U
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- high speed
- grounding switch
- mechanical property
- drive rod
- displacement sensor
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Abstract
The utility model provides detection and the fitting device of a kind of high speed grounding switch mechanical property, is related to electrical protection apparatus technical field.The device includes transmission device, operating mechanism, linear type displacement sensor, digital signal acquiring unit, central processing unit and PC machine；Transmission device includes drive rod, guiding, connecting plate and connecting lever, and linear type displacement sensor is fixed on drive rod；Digital signal acquiring unit includes operational amplifier and A/D converter；Central processing unit uses single-chip microcontroller, and output end connects PC machine.The detection of the utility model connect simple, easy to operate with each section of fitting device, it is convenient that input quantity is extracted, output quantity saves export, whole device is very intelligent, economic and environment-friendly, can real-time detection mechanical property by the cooperating of displacement sensor, digital signal acquiring unit, central processing unit and PC machine.
Description
Technical field
The utility model relates to electrical protection apparatus technical field more particularly to a kind of high speed grounding switch mechanical properties
Detection and fitting device.
Background technique
In recent years, with the raising of transmission line of electricity voltage class, delivered length is elongated, wire spacing is big, dive for electric arc
Probability is generated to be gradually increased, it is latent to extinguish the reclosing for directly affecting route for electric arc.High speed grounding switch generally comprises dynamic
Contact, static contact, static side shielding case and moved end shielding case, above-mentioned device are installed in a Crankarm box, filled with SF in box6Gas
Body, Crankarm box shell are equipped with ground terminal.High speed grounding switch is able to suppress due to the ability with opening and closing induction current
Generation on transmission line of electricity is latent for electric arc, and then the success rate of circuit re-switching significantly.The extinguishing of gaseous arc with it is surrounding
The certain relationship of airflow state, under the action of different mechanical properties, the air-flow of proximate contacts constantly becomes high speed grounding switch contact
Change, directly affects the extinguishing of electric arc, and then influence the arc extinguishing ability of high speed grounding switch；In addition, high speed grounding switch machinery machine
The failure of structure can make mechanical property abnormal, to generate the case where refusing folding or maloperation, prevent high speed grounding switch from normal
Work.Therefore, to the real-time monitoring of high speed grounding switch mechanical property, its reliability of operation can be improved；Meanwhile optimization is fast
Switching to quick access mechanical property can be improved its ability for extinguishing the latent electric arc supplied.
Often there is operating process complexity in traditional high speed grounding switch mechanical feature detection device, detection process is vibrated dry
The influence disturbed, the mechanical property detected in this way often have noise and disorderly and unsystematic；In addition, existing to the discrete of irregularities
Data are related to derivation of equation complexity frequently with special algorithm algorithm, therefore process tedious designs a kind of easy to operate, anti-vibration
The mechanical feature detection device of high speed grounding switch, and will test data and be accurately fitted to smooth, regular mechanical property
Curve is particularly important.
Utility model content
In view of the above-mentioned deficiencies of the prior art, technical problem to be solved by the utility model is to provide a kind of rapid groundings to open
Detection and the fitting device of mechanical property are closed, each section connection of device is simple, and input quantity is extracted, output quantity saves export side
Just, whole device is very intelligent, economic and environment-friendly, makes mechanical property more reasonableization finally obtained, regularization.
In order to solve the above technical problems, technical solution adopted in the utility model is:
The utility model provides a kind of detection of high speed grounding switch mechanical property and is fitted device, including transmission device,
Operating mechanism, linear type displacement sensor, digital signal acquiring unit, central processing unit and PC machine；
The transmission device includes drive rod, guiding, connecting plate and connecting lever；
The moving contact upper end of the high speed grounding switch by connecting plate with guiding first end be connected, be oriented to first end and meanwhile with
Connecting lever one end is connected, and the connecting lever other end is fixed on inside Crankarm box upper end；Guiding second end passes through Crankarm box shell and is connected to outside
Drive rod one end, the drive rod other end connects the operating mechanism；The operating mechanism is spring operating mechanism；The straight line
Formula displacement sensor is fixed on drive rod；
The digital signal acquiring unit includes operational amplifier and A/D converter；The opamp input terminal connects
Linear type displacement sensor output end is connect, the voltage signal for exporting linear type displacement sensor reduces；The A/D
Switch input connects the operational amplifier output terminal, and the A/D converter output end connects central processing unit, and being used for will
The voltage signal of linear type displacement sensor output carries out analog-to-digital conversion after operational amplifier, and the digital signal after conversion is defeated
Enter into central processing unit；
The central processing unit uses single-chip microcontroller, and output end connects PC machine, for converting displacement letter for voltage signal
Number, and any time velocity amplitude is calculated, it will finally be displaced, the amplification of velocity amplitude result, and obtain initial acquisition result input PC
Processing is fitted in machine；
The executable fitting optimization program of computer, the displacement obtained according to single-chip microcontroller, speed are stored in the PC machine
And time value, optimization is fitted to raw sample data using the Fitting Toolbox in MATLAB, determines optimum fit curve,
Obtain ideal mechanical characteristic.
Further, the formula that any time velocity amplitude is calculated in single-chip microcontroller is as follows:
Wherein, vnInstantaneous velocity when for n-th group of data, tnAnd snRespectively n-th group of data corresponding time and stroke,
tn-1And sn-1Respectively (n-1)th group of data corresponding time and stroke.
Further, the single-chip microcontroller and PC machine data are transmitted through double group driver/receivers and communication interface carries out.
The beneficial effects of adopting the technical scheme are that a kind of high speed grounding switch provided by the utility model
The detection of mechanical property and fitting device pass through displacement sensor, number under the conditions of carrying out switching on and off for high speed grounding switch
The cooperating of word signal acquisition unit, central processing unit and PC machine can real-time detection mechanical property, each section of device connects
Connect simple, input quantity is extracted, output quantity saves that export is convenient, and whole device is very intelligent, economic and environment-friendly, makes to finally obtain
Mechanical property more reasonableization, regularization.
Detailed description of the invention
Fig. 1 is that the detection of high speed grounding switch mechanical property provided by the embodiment of the utility model and fitting apparatus structure show
It is intended to；
Fig. 2 is the circuit connection diagram of digital signal acquiring unit and central processing unit provided by the embodiment of the utility model；
Fig. 3 is the mechanical property detection and approximating method process of high speed grounding switch provided by the embodiment of the utility model
Figure；
Fig. 4 is the Velocity-time characteristic with noise (before fitting) in the case of separating brake provided by the embodiment of the utility model
Variation diagram；
Fig. 5 is the speed under single order Gaussian function and quadravalence fourier function approximating method provided by the embodiment of the utility model
Degree-time response variation diagram.
In figure: 1, moving contact；2, static contact；3, static side shielding case；4, moved end shielding case；5, fixed contact pedestal；6, Crankarm box；
7, ground terminal；8, drive rod；9, it is oriented to；10, connecting plate；11, connecting lever；12, operating mechanism；13, linear type displacement sensor；
14, digital signal acquiring unit；15, central processing unit；16, PC machine.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As shown in Figure 1, the present embodiment provides a kind of detections of high speed grounding switch mechanical property and fitting device, comprising:
Transmission device, operating mechanism 12, linear type displacement sensor 13, digital signal acquiring unit 14, central processing unit 15 and PC
Machine 16.
Tested high speed grounding switch includes moving contact 1, static contact 2, static side shielding case 3, moved end shielding case 4, fixed contact pedestal
5, above-mentioned device is installed in Crankarm box 5, filled with SF6Gas, Crankarm box shell are equipped with ground terminal 6；
The moving contact 1 and 2 material of static contact are copper, tungsten alloy, and 1 chamfer radius of moving contact is 3mm, and shape is in six valves
Type, end polish smooth, and 2 barred body diameter of static contact is 15mm；Static contact chamfer radius is 6mm, and lower section is fixedly mounted on stationary contact
On headstock 5.
Transmission device includes drive rod 8, guiding 9, connecting plate 10 and connecting lever 11.1 upper end of moving contact passes through connecting plate 10 and guiding 9
It is connected, is oriented to 9 one side through Crankarm box shell and is connected to ex-ternal transmission bar 8, be on the other hand connected with connecting lever 11,11 other end of connecting lever
Inside fixed 5 upper end of Crankarm box.8 one end of drive rod is driven by operating mechanism 12 indirectly, and operating mechanism 12 machines of electricity are to switching on and off
Coil energy storage, when high speed grounding switch carries out switching on and off operation, switching on and off coil energy release, so that pushing and pulling drive rod 8 makes
Its side-to-side movement, the other end of drive rod 8 are connected to guiding 9, and drive rod 8 is connected with moving contact 1 indirectly, due to drive rod indirectly with
Moving contact is connected, and therefore, linear type displacement sensor 13 is fixed on drive rod 8, the stroke measured is that rapid grounding is opened
The stroke of pass, the i.e. mechanical property of high speed grounding switch.
In the present embodiment, linear type displacement sensor 13 uses the general rod-pulling type displacement sensor of model SCT, effective quantity
Journey is 50mm-1250mm, and precision 0.001mm, the extreme sport speed of permission is 10m/s, and output signal is 0-5V or 0-10V
(power supply x volt, output are that 0-x is lied prostrate).The function of the sensor is straight line mechanical displacement to be converted into electric signal, and the two at
Direct ratio, output is voltage signal.In the present embodiment, select the supply voltage of linear type displacement sensor for 10V.Use original
Reason are as follows: by the variable resistance sliding rail fixation in linear type displacement sensor sensor fixed position, by slide plate in sliding rail
On displacement reflect change in displacement (two-value direct proportionality) indirectly to measure the voltage value of different resistance value measurement resistance.
Digital signal acquiring unit 14 includes operational amplifier, A/D converter.Operational amplifier is used for linear displacement
The voltage signal of sensor output is reduced, and the maximum voltage for preventing sensor from exporting is higher than the input voltage of single-chip microcontroller, A/D
The voltage signal that converter is used to export linear type displacement sensor carries out analog-to-digital conversion after operational amplifier, so as to
Digital signal after conversion is input in single-chip microcontroller.In the present embodiment, operational amplifier is put using the operation of model op07
Big device, displacement sensor detection signal have pin 2 (- IN) to input proportional amplifier, are exported by pin 6 (OUT), pin 7 (V+)
External positive and negative 15V power supply, pin 3 (+IN) are grounded respectively with pin 4 (V-), proportionality coefficient α=0.5.A/D converter uses
The high-precision AD acquisition chip ADS7809 that Burr-Brown company releases, it is with sampling holding with 16 based on capacitor
Successive approximation register type analog-to-digital converter, 100kHz sampling rate, 20kHz input when signal-to-noise ratio reach 83dB；Pin 3
(REF) it is connected for input terminal with amplifier pin 6 (OUT), pinPin 19 (VANA), pin 20
(VDIG)+5V power supply is connect, output end is pin 13 (SDA), pin
In the present embodiment, central processing unit 15 is responsible for converting voltage signal using the single-chip microcontroller of model STC89C52
For displacement signal, and any time velocity amplitude is calculated by formula, finally will displacement, the amplification of velocity amplitude result, it is corresponding just
Walk collection result.Select the port P1 for input terminal, the port P0, P2 is output end, wherein A/D converter pin 13 (SDA), pinIt is connected respectively at pin 4 (P13), pin 5 (P14), the pin 10 (RXD) and pin 11 (TXD) of single-chip microcontroller are respectively
It is connected with the pin 12 (Rlout) of double groups of driver/receiver MAX232 and pin 11 (Tlin), for the defeated of unified single-chip microcontroller
The level that uses of level and communication interface DB9 out, outer PC organize driver/receivers with double by communication interface DB9
MAX232 transmits to realize with the data of single-chip microcontroller.The circuit connection diagram of digital signal acquiring unit and central processing unit such as Fig. 2
It is shown.
Due to operating mechanism 12 motor operation when and switching on and off spring release process will drive drive rod 8 generate vibration
Dynamic, the data moment for causing the sensor being fixed on drive rod 8 13 to detect is unreasonable in the data for fluctuating, detecting, presses
It has clearly a need for further being fitted optimization according to the mechanical property that above-mentioned apparatus measures.
Be stored with the executable fitting optimization program of computer in PC machine 16, the displacement obtained according to single-chip microcontroller, speed and
Time value is fitted optimization to raw sample data using the Fitting Toolbox in MATLAB, determines optimum fit curve, obtain
To ideal mechanical characteristic.
The sample data that mechanical property detection for above-mentioned high speed grounding switch is detected with fitting device, Ke Yijin
One step carries out the fitting optimization of the mechanical characteristic of high speed grounding switch, flow chart such as Fig. 3 institute of detection and approximating method
Show, specifically includes following steps.
Step 1: starting 12 motor of operating mechanism makes high speed grounding switch carry out point (conjunction) lock operation.
Step 2: the displacement of drive rod 8, real-time collection voltages signal are measured by linear displacement transducer 13.
Step 3: being reduced the voltage signal of acquisition by digital signal processing unit 14, analog-to-digital conversion.
Step 4: handling to obtain shift value by single-chip microcontroller internal arithmetic.
Step 5: calculating any time speed according to the following formula；
Wherein, vnInstantaneous velocity when for n-th group of data；tnAnd snRespectively n-th group of data corresponding time and stroke,
tn-1And sn-1Respectively (n-1)th group of data corresponding time and stroke, make consecutive sampling times sufficiently small as far as possible, can use in this way
Average speed replaces the instantaneous velocity of any time.T in specific implementationn-1And tnPeriod is shorter, is taken as 0.667ms, approximate
Think tn-1And tnAverage speed in time is equal to instantaneous velocity when n-th group of data.
Step 6: by single-chip microcontroller treated displacement, speed, time value by double group driver/receivers, passing to PC
Machine 16.By taking the movement of high speed grounding switch separating brake as an example, table 1 is in the 6.003ms-10.005ms time through single-chip microcontroller treated position
It moves, velocity amplitude, sampling period 0.667ms.
Through single-chip microcontroller treated displacement, velocity amplitude in the 1 6.003ms-10.005ms time of table
| Time (ms) | 6.003 | 6.67 | 7.337 | 8.004 | 8.671 | 9.338 | 10.005 |
| Stroke (mm) | 229.617 | 225.8057 | 225.8057 | 228.5457 | 228.6648 | 228.8236 | 228.6648 |
| Speed (m/s) | 5.715 | 0 | -4.108 | -0.178 | -0.238 | 0.238 | 2.202 |
Following two problem as seen from Table 1: (1) the speed moment of 6.67ms is reduced to 0, and later moment in time has speed,
This is because drive rod does not move in 6.67ms-7.337ms, average speed 0；(2)7.337ms,8.004ms,8.671ms
The speed at moment is negative value, this is because the displacement for the later moment in time that displacement sensor 13 detects is greater than previous moment, (separating brake is answered
Less than).The mechanical property partial data point detected by above-mentioned apparatus is unreasonable, so that mechanical characteristic and random
Therefore rule optimizes it is necessary to which data are carried out further fitting.
Step 7: optimization being fitted to raw sample data using the Fitting Toolbox in MATLAB, data is made to become to close
Physical and chemical, regularization；
Step 7.1: in MATLAB command window input " cftool " order, opening the Fitting Toolbox of MATLAB, directly
During sample data is imported, establish using stroke or speed as the longitudinal axis, two-dimentional fitted coordinate system of the time as horizontal axis, this implementation
It, will be discrete using the Velocity-time data under the conditions of high speed grounding switch separating brake as the primary data sample of fitting optimization in example
Data connection gets up can be obtained the Velocity-time characteristic variations figure with noise (before fitting) in the case of separating brake, as shown in figure 4,
As shown in Figure 4, the velocity amplitude detected by above-mentioned apparatus at part moment and unreasonable, for example, contact move 70ms with
Even there is negative value afterwards, this does not obviously meet reality；
Step 7.2: choosing different types of matched curve in Fitting Toolbox and be fitted, according to selected data sample
Curve shape, " single order Gaussian function " and " quadravalence fourier function " is chosen in the present embodiment and is fitted optimization respectively；
Step 7.3: the mechanical property after optimization is fitted by " single order Gaussian function " and " quadravalence fourier function "
Curve is as shown in figure 5, data comparison is done to compare by the matched curve of two kinds of type function and before being fitted, it is found that " in quadravalence Fu
Leaf function " matched curve closer to raw sample data, illustrates through " quadravalence fourier function " compared with " single order Gaussian function "
Mechanical characteristic after being fitted optimization is more accurate, therefore selects the mechanical property under the function after fitting optimization bent
Line.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features
It is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and the utility model right is wanted
Seek limited range.
Claims (2)
1. a kind of detection of high speed grounding switch mechanical property and fitting device, it is characterised in that: the device include transmission device,
Operating mechanism (12), linear type displacement sensor (13), digital signal acquiring unit (14), central processing unit (15) and PC machine
(16)；
The transmission device includes drive rod (8), guiding (9), connecting plate (10) and connecting lever (11)；
The moving contact upper end of the high speed grounding switch is connected by connecting plate (10) with guiding (9) first end, and (9) first end is oriented to
It is connected simultaneously with connecting lever (11) one end, connecting lever (11) other end is fixed on inside Crankarm box upper end；Guiding (9) second end, which passes through, to turn
Arm box shell is connected to external drive rod (8) one end, and drive rod (8) other end connects the operating mechanism (12)；The actuating
Mechanism (12) is spring operating mechanism；The linear type displacement sensor (13) is fixed on drive rod (8)；
The digital signal acquiring unit (14) includes operational amplifier and A/D converter；The opamp input terminal connects
Connect linear type displacement sensor (13) output end；The A/D converter input terminal connects the operational amplifier output terminal, described
A/D converter output end connects central processing unit (15)；
The central processing unit (15) uses single-chip microcontroller, and output end connects PC machine (16).
2. the detection of high speed grounding switch mechanical property according to claim 1 and fitting device, it is characterised in that: described
Single-chip microcontroller and PC machine (16) data are transmitted through double group driver/receivers and communication interface carries out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854201.1U CN208313571U (en) | 2018-06-04 | 2018-06-04 | A kind of detection of high speed grounding switch mechanical property and fitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854201.1U CN208313571U (en) | 2018-06-04 | 2018-06-04 | A kind of detection of high speed grounding switch mechanical property and fitting device |
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| Publication Number | Publication Date |
|---|---|
| CN208313571U true CN208313571U (en) | 2019-01-01 |
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ID=64709504
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820854201.1U Expired - Fee Related CN208313571U (en) | 2018-06-04 | 2018-06-04 | A kind of detection of high speed grounding switch mechanical property and fitting device |
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|---|---|
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2018
- 2018-06-04 CN CN201820854201.1U patent/CN208313571U/en not_active Expired - Fee Related
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