CN109211400A - A kind of vibration of elevator data acquisition circuit that analog and digital signal is isolated entirely - Google Patents
A kind of vibration of elevator data acquisition circuit that analog and digital signal is isolated entirely Download PDFInfo
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Abstract
The present invention provides a kind of vibration of elevator data acquisition circuit that analog and digital signal is isolated entirely, the vibration of elevator data acquisition circuit includes power isolation module, power circuit conversion module, acceleration transducer, analog and digital signal isolation module, and analog-to-digital conversion module, power isolation module is isolated by external power supply, and power isolation module is connect with power circuit conversion module, supply voltage needed for supply voltage needed for 12V power supply is converted to acceleration transducer by power circuit conversion module and analog-to-digital conversion module, the analog signal data of acquisition is converted to digital signal data by analog-to-digital conversion module by acceleration transducer, analog and digital signal isolation module is connect with analog-to-digital conversion module and Back end data processing system respectively, the analog and digital signal isolation module prevents Back end data processing system Noise be transferred on vibration of elevator data acquisition circuit by conduction pattern, reduce the noise jamming of vibration of elevator data acquisition circuit.
Description
Technical field
The present invention relates to special equipment technical field, especially a kind of vibration of elevator number that analog and digital signal is isolated entirely
According to Acquisition Circuit.
Background technique
Vibration of elevator and elevator ride comfort are closely bound up, and EVA is the common tool of vibration of elevator test, but EVA valence
Lattice are expensive, volume is heavy, inconvenient to carry.It is destined in Back end data processing system after existing vibration of elevator data acquisition
CPU carry out subsequent processing, but the noise of digital circuit can be bigger in Back end data processing system；Elevator is shaken in this way
After dynamic data acquisition circuit is directly connect with Back end data processing system, the noise meeting of digital circuit in Back end data processing system
It is transferred on data acquisition circuit by conduction pattern, the data accuracy for causing vibration of elevator data acquisition circuit to acquire in this way
It is relatively low.
Summary of the invention
In order to overcome the problems referred above, the object of the present invention is to provide a kind of vibration of elevator numbers that analog and digital signal is isolated entirely
According to Acquisition Circuit, the signal-to-noise ratio of hoisting elevator vibrating data collection circuit has the function of reducing noise.
The present invention is realized using following scheme: a kind of vibration of elevator data that analog and digital signal is isolated full acquisition electricity
Road, the vibration of elevator data acquisition circuit are connect with Back end data processing system, the vibration of elevator data acquisition circuit packet
Include power isolation module, power circuit conversion module, acceleration transducer, analog and digital signal isolation module and modulus
External power supply is isolated for conversion module, the power isolation module, and power isolation module and the power circuit are converted
Module connection, supply voltage and modulus needed for 12V power supply is converted to acceleration transducer by the power circuit conversion module
The analog signal data of acquisition is passed through the analog-to-digital conversion mould by supply voltage needed for conversion module, the acceleration transducer
Block is converted to digital signal data, the analog and digital signal isolation module respectively with the analog-to-digital conversion module and rear end number
It is connected according to processing system, the analog and digital signal isolation module prevents the noise of Back end data processing system from passing through conduction side
Formula is transferred on vibration of elevator data acquisition circuit, reduces the noise jamming of vibration of elevator data acquisition circuit.
Further, the power isolation module includes power module URB2412YMD-10WR3, capacitor C87, capacitor
C88, electrolytic capacitor CD17, capacitor C86, capacitor C85 and electrolytic capacitor CD16, the capacitor C87, capacitor C88, electrolysis electricity
It is in parallel to hold CD17, one end of the electrolytic capacitor CD17 is connect with internal electric source, and the other end of electrolytic capacitor CD17 and simulation are believed
Number ground wire GND connection, the one end the capacitor C87 are connect with the VOUT pin of power module URB2412YMD-10WR3, the electricity
Hold the C87 other end to connect with the VGND pin of power module URB2412YMD-10WR3, the capacitor C86, capacitor C85, electrolysis
Capacitor CD16 is in parallel, and one end of the electrolytic capacitor CD16 is connect with external power supply, the other end and number of electrolytic capacitor CD16
Signal ground DGND connection, the one end the capacitor C85 is connect with the VIN pin of power module URB2412YMD-10WR3, described
The capacitor C85 other end is connect with the EARTH pin of power module URB2412YMD-10WR3.
Further, the power circuit conversion module includes that 12V power supply turns 9V power circuit, 9V power supply turns 3.3V power supply
Circuit, 9V power supply turn 2.5V power circuit and 9V power supply turns 5V power circuit, the 12V power supply turn 9V power circuit with it is described
Power isolation module connection, the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V power circuit, 9V power supply turns 5V power supply
Circuit on one side turns 9V power circuit with the 12V power supply and connect, and the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V
Power circuit, 9V power supply turn the 5V power circuit other end and connect with the analog-to-digital conversion module, the acceleration transducer with
The 12V power supply turns the connection of 9V power circuit.
Further, it includes LM317DCY chip, capacitor C8, chip inductor B2, electricity that the 12V power supply, which turns 9V power circuit,
Solve capacitor CD3, capacitor C9, resistance R14, capacitor C12, resistance R11, diode D3, resistance R9, electrolytic capacitor CD2, capacitor C6,
Capacitor C7 and resistance R953；One end and the capacitor C8, chip inductor B2 go here and there after the electrolytic capacitor CD3, capacitor C9 are in parallel
Connection, the other end are connect with the VIN pin of LM317DCY chip；The capacitor C8 and the internal electric source of the power isolation module connect
It connects, one end is connect with the ADJ pin of LM317DCY chip after the resistance R14 is in parallel with capacitor C12, the other end and analog signal
Ground wire GND connection；One end is connect with the OUT pin of LM317DCY chip after the resistance R11, diode D3 parallel connection, the other end
It is connect with capacitor C12；One end and resistance R9 mono- after the electrolytic capacitor CD2, capacitor C6, capacitor C7 and resistance R953 parallel connection
End connection, the other end are connect with analog signal ground wire GND；The resistance R9 other end is connect with the diode D3；
It includes: AZ1117H-3.3TRG1 chip, capacitor C17, capacitor C18, capacitor that the 9V power supply, which turns 3.3V power circuit,
One end and the 12V power supply turn 9V power circuit after C19, capacitor C20, resistance R51, the capacitor C17, capacitor C18 are in parallel
Capacitor C7 connection, the other end are connect with the IN pin of the AZ1117H-3.3TRG1 chip, the AZ1117H-3.3TRG1 core
The VOUT pin and OUT pins in parallel of piece, one end and AZ1117H- after the capacitor C19, capacitor C20, resistance R51 are in parallel
The VOUT pin of 3.3TRG1 chip connects, and the other end is connect with analog signal ground wire GND；
The 9V power supply turn 2.5V power circuit include: AZ1117EHADJ chip, capacitor C26, capacitor C27, resistance R19,
One end and the 12V power supply turn after resistance R20, capacitor C22, capacitor C23, resistance R50, the capacitor C26, capacitor C27 are in parallel
The capacitor C7 connection of 9V power circuit, the other end are connect with the VIN pin of AZ1117EHADJ chip；The resistance R19, resistance
R20 series connection, the one end the resistance R20 connect with the ADJ pin of the AZ1117EHADJ chip, the other end with it is described
The OUT pin of AZ1117EHADJ chip connects；After the capacitor C22, capacitor C23, resistance R50 are in parallel one end with it is described
The OUT pin of AZ1117EHADJ chip connects, and the other end is connect with analog signal ground wire GND；
It includes: ADR4533ARZ chip, capacitor C50, chip inductor B9, electrolytic capacitor that the 9V power supply, which turns 5V power circuit,
CD13, capacitor C51, resistance R34, electrolytic capacitor CD14, capacitor C52, capacitor C53, the electrolytic capacitor CD13, capacitor C51 are simultaneously
One end is connected with the capacitor C50, chip inductor B9 after connection, and the other end is connect with the Vin pin of ADR4533ARZ chip；It is described
One end is connect with resistance R34 after electrolytic capacitor CD14, capacitor C52, capacitor C53 parallel connection, and the other end and analog signal ground wire GND connect
It connects, the resistance R34 is connect with the VOUT pin of the ADR4533ARZ chip.
Further, the analog-to-digital conversion module includes J39 socket, AD7766 chip, resistance R41, resistance R45, capacitor
C71, capacitor C80, capacitor C57, capacitor C72, capacitor C73, the acceleration transducer are connect with the J39 socket, the J39
1st pin of socket is connect with the capacitor C7 that the 12V power supply turns 9V power circuit, and the 2nd pin of the J39 socket passes through institute
Resistance R41 is stated to connect with the VIN+ pin of the AD7766 chip, the 3rd pin of the J39 socket by the resistance R45 with
The VIN- pin of the AD7766 chip connects, after the 4th pin and the 5th pins in parallel of the J39 socket with analog signal
Line GND connection, the VRef+ pin of the AD7766 chip turn the electricity of 5V power circuit with capacitor C71 and the 9V power supply respectively
One end is connect with the AVdd pin of the AD7766 chip after appearance C53 connection, the capacitor C80 and capacitor C57 parallel connection, the other end
It is connect with analog signal ground wire GND；The AVdd pin of the AD7766 chip and the 9V power supply turn the electricity of 2.5V power circuit
Hold C23 connection, the DVdd pin of the AD7766 chip turns the capacitor C23 and electricity of 2.5V power circuit with the 9V power supply respectively
Hold C72 connection, the Vdrive pin of the AD7766 chip turn respectively with the 9V power supply 3.3V power circuit capacitor C20 and
Capacitor C73 connection.
Further, the analog and digital signal isolation module includes ADUM3151A chip, ACPL_M61 chip, electricity
Hold C89, resistance R70, resistance R71, resistance R72, resistance R73, resistance R79, capacitor C95, resistance R48, resistance R74, resistance
R77, resistance R78 and capacitor C96, the VDD1 pin of the VDD pin of the ACPL_M61 chip and the ADUM3151A chip
Connection, the resistance R74 are connect with the Anode pin of the ACPL_M61 chip, the resistance R77 and the ACPL_M61 core
The Cathode pin of piece connects, and the resistance R78 is connect with the VO pin of the ACPL_M61 chip, the ADUM3151A core
The VDD2 pin of piece is connect with the Vdrive pin of the AD7766 chip, the capacitor C89 and the ADUM3151A chip
The connection of VDD2 pin, the resistance R70 connect with the SCLK pin of the ADUM3151A chip, the resistance R71 with it is described
The SO pin of ADUM3151A chip connects, and the resistance R72 is connect with the nSSS pin of the ADUM3151A chip, the electricity
Resistance R73 is connect with the VOA pin of the ADUM3151A chip, the VOB pin of the resistance R79 and the ADUM3151A chip
Connection, the capacitor C95 are connect with the VDD1 pin of the ADUM3151A chip, the resistance R48 and the ADUM3151A
The VIB pin of chip connects.
Further, the acceleration information obtained to acceleration transducer is filtered, to reduce extraneous interference
The interference of signal, the filtering processing specifically: by 2000hz sample rate, 50hz first is carried out to the acceleration initial data of acquisition
Notch filter algorithm:
y50(k)=- A (1,2) * y50(k-1)-A(1,3)*y50(k-2)+B(1,1)*x(k)+B(1,2)*x(k-1)+B(1,
3) * x (k-2), wherein
X (k) is that the acceleration at k moment samples original value, y50It (k) is the acceleration information after 50hz notch filter；
A (i, j) representing matrix
A the i-th row j column data；B (i, j) representing matrix B the i-th row j column data；ω0For trapper trap frequency, 50hz, ω are takenfFor signal
Sample frequency, α are trapper coefficient, take 0.9；
100hz notch filter algorithm is carried out to the acceleration information after 50hz notch filter algorithm again:
y100(k)=- C (1,2) * y100(k-1)-C(1,3)*y100(k-2)+D(1,1)*y50(k)+D(1,2)*y50(k-1)
+D(1,3)*y50(k-2)
Wherein y100It (k) is the acceleration information after 100hz notch filter；
C (i, j) representing matrix
C the i-th row j column data；D (i, j) representing matrix D the i-th row j column data；ω1For trapper trap frequency, 100hz, ω are takenfFor letter
Number sample frequency, α are trapper coefficient, take 0.9；
Finally, 100hz notch filter post-acceleration data pass through second order Chebyshev's low pass that cutoff frequency is 120hz again
Filtering, and the acceleration information of second order Chebyshev's low-pass filtering is used for a time integral and obtains three axle speed data,
The acceleration information of second order Chebyshev's low-pass filtering obtains the location information of elevator for secondary time integral.
The beneficial effects of the present invention are: isolated from power mould is provided in vibration of elevator data acquisition circuit of the invention
Block, power circuit conversion module, analog and digital signal isolation module, power isolation module is by the power supply of external power supply and equipment
Isolation is carried out, so as to the signal-to-noise ratio of hoisting elevator vibrating data collection circuit, reduces the effect of noise, analog- and digital- letter
Number isolation module is completely isolated by digital signal and analog signal both ends, improves the acquisition of vibration of elevator data acquisition circuit in this way
The accuracy of data；And by being filtered to the acceleration information that acceleration transducer obtains, to reduce extraneous do
The interference of signal is disturbed, to improve the accuracy of acceleration information, also improves vibration of elevator data acquisition circuit acquisition data
Accuracy.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention.
Fig. 2 is the structural schematic diagram of detailed circuit of the invention.
Fig. 3 is the detailed construction schematic diagram of power isolation module of the invention.
Fig. 4 is the detailed construction schematic diagram of power circuit conversion module of the invention.
Fig. 5 is the detailed construction schematic diagram of analog-to-digital conversion module of the invention.
Fig. 6 is the detailed construction schematic diagram of analog and digital signal isolation module of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
It please refers to shown in Fig. 1 to Fig. 6, the vibration of elevator data acquisition that a kind of analog and digital signal of the invention is isolated entirely
Circuit, the vibration of elevator data acquisition circuit are connect with Back end data processing system, the vibration of elevator data acquisition circuit
Including power isolation module, power circuit conversion module, acceleration transducer, analog and digital signal isolation module, Yi Jimo
External power supply is isolated for number conversion module, the power isolation module, and power isolation module and the power circuit turn
Change the mold block connection, supply voltage and mould needed for 12V power supply is converted to acceleration transducer by the power circuit conversion module
The analog signal data of acquisition is passed through the analog-to-digital conversion by supply voltage needed for number conversion module, the acceleration transducer
Module is converted to digital signal data, the analog and digital signal isolation module respectively with the analog-to-digital conversion module and rear end
Data processing system connection, the analog and digital signal isolation module prevent the noise of Back end data processing system from passing through conduction
Mode is transferred on vibration of elevator data acquisition circuit, reduces the noise jamming of vibration of elevator data acquisition circuit.Wherein, scheme
1 entire circuit diagram is divided into two parts of left and right side；I.e. left side is vibration of elevator data acquisition circuit, and right side is Back end data
Processing system；Two parts of left and right side, external power supply pass through the power isolation module (URB2412YMD- of golden rising Yang
10WR3) realize isolation；And the signal of communication of two parts of left and right side passes through in analog and digital signal isolation module
ADUM3151A chip and ACPL-M61 chip realize isolation；So the ground wire on left and right side both sides is also completely absolutely
Edge；Thus the noise then above the Back end data processing system on right side would not be transferred to right side by conduction pattern
Divide Acquisition Circuit；To reduce the noise jamming to the acquisition of left side circuit signal；It is able to ascend whole system data acquisition electricity
The signal-to-noise ratio on road.
In the present invention, the power isolation module includes power module URB2412YMD-10WR3, capacitor C87, capacitor
C88, electrolytic capacitor CD17, capacitor C86, capacitor C85 and electrolytic capacitor CD16, the capacitor C87, capacitor C88, electrolysis electricity
It is in parallel to hold CD17, one end of the electrolytic capacitor CD17 is connect with internal electric source, and the other end of electrolytic capacitor CD17 and simulation are believed
Number ground wire GND connection, the one end the capacitor C87 are connect with the VOUT pin of power module URB2412YMD-10WR3, the electricity
Hold the C87 other end to connect with the VGND pin of power module URB2412YMD-10WR3, the capacitor C86, capacitor C85, electrolysis
Capacitor CD16 is in parallel, and one end of the electrolytic capacitor CD16 is connect with external power supply, the other end and number of electrolytic capacitor CD16
Signal ground DGND connection, the one end the capacitor C85 is connect with the VIN pin of power module URB2412YMD-10WR3, described
The capacitor C85 other end is connect with the EARTH pin of power module URB2412YMD-10WR3.
The power circuit conversion module includes that 12V power supply turns 9V power circuit, 9V power supply turns 3.3V power circuit, 9V electricity
Source turns 2.5V power circuit and 9V power supply turns 5V power circuit, and the 12V power supply turns 9V power circuit and the isolated from power
Module connection, the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V power circuit, 9V power supply turns 5V power circuit one end
Turn 9V power circuit with the 12V power supply to connect, the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V power supply electricity
Road, 9V power supply turn the 5V power circuit other end and connect with the analog-to-digital conversion module, the acceleration transducer and the 12V
Power supply turns the connection of 9V power circuit.
It includes LM317DCY chip, capacitor C8, chip inductor B2, electrolytic capacitor that the 12V power supply, which turns 9V power circuit,
CD3, capacitor C9, resistance R14, capacitor C12, resistance R11, diode D3, resistance R9, electrolytic capacitor CD2, capacitor C6, capacitor C7,
And resistance R953；One end is connected with the capacitor C8, chip inductor B2 after the electrolytic capacitor CD3, capacitor C9 parallel connection, another
End is connect with the VIN pin of LM317DCY chip；The capacitor C8 is connect with the internal electric source of the power isolation module, described
One end is connect with the ADJ pin of LM317DCY chip after resistance R14 is in parallel with capacitor C12, the other end and analog signal ground wire GND
Connection；One end is connect with the OUT pin of LM317DCY chip after the resistance R11, diode D3 parallel connection, the other end and capacitor
C12 connection；One end is connect with the one end resistance R9 after the electrolytic capacitor CD2, capacitor C6, capacitor C7 and resistance R953 parallel connection,
The other end is connect with analog signal ground wire GND；The resistance R9 other end is connect with the diode D3；The 12V power supply turns 9V
Power circuit provides power supply for acceleration transducer, also turn 3.3V power circuit for 9V power supply, 9V power supply turns 2.5V power circuit,
9V power supply turns 5V power circuit and provides power supply.
It includes: AZ1117H-3.3TRG1 chip, capacitor C17, capacitor C18, capacitor that the 9V power supply, which turns 3.3V power circuit,
One end and the 12V power supply turn 9V power circuit after C19, capacitor C20, resistance R51, the capacitor C17, capacitor C18 are in parallel
Capacitor C7 connection, the other end are connect with the IN pin of the AZ1117H-3.3TRG1 chip, the AZ1117H-3.3TRG1 core
The VOUT pin and OUT pins in parallel of piece, one end and AZ1117H- after the capacitor C19, capacitor C20, resistance R51 are in parallel
The VOUT pin of 3.3TRG1 chip connects, and the other end is connect with analog signal ground wire GND；
The 9V power supply turn 2.5V power circuit include: AZ1117EHADJ chip, capacitor C26, capacitor C27, resistance R19,
One end and the 12V power supply turn after resistance R20, capacitor C22, capacitor C23, resistance R50, the capacitor C26, capacitor C27 are in parallel
The capacitor C7 connection of 9V power circuit, the other end are connect with the VIN pin of AZ1117EHADJ chip；The resistance R19, resistance
R20 series connection, the one end the resistance R20 connect with the ADJ pin of the AZ1117EHADJ chip, the other end with it is described
The OUT pin of AZ1117EHADJ chip connects；After the capacitor C22, capacitor C23, resistance R50 are in parallel one end with it is described
The OUT pin of AZ1117EHADJ chip connects, and the other end is connect with analog signal ground wire GND；
It includes: ADR4533ARZ chip, capacitor C50, chip inductor B9, electrolytic capacitor that the 9V power supply, which turns 5V power circuit,
CD13, capacitor C51, resistance R34, electrolytic capacitor CD14, capacitor C52, capacitor C53, the electrolytic capacitor CD13, capacitor C51 are simultaneously
One end is connected with the capacitor C50, chip inductor B9 after connection, and the other end is connect with the Vin pin of ADR4533ARZ chip；It is described
One end is connect with resistance R34 after electrolytic capacitor CD14, capacitor C52, capacitor C53 parallel connection, and the other end and analog signal ground wire GND connect
It connects, the resistance R34 is connect with the VOUT pin of the ADR4533ARZ chip.
Since AD7766 chip needs to use 3 road power supplys, turn 3.3V power circuit, 9V power supply provided with 9V power supply
Turn 2.5V power circuit, 9V power supply turns 5V power circuit, those power circuits be respectively 3.3V, 2.5V and 5V reference electricity
Pressure；Realize that 9V is transformed into 3.3V with AZ1117-3.3TRG1；The power supply conversion of 9V to 2.5v is realized with AZ1117EHADJ；With
The ultra-low noise of ADR4533ARZ chip, high-precision reference voltage source chip realize the conversion of 9V to 5V reference voltage.
The analog-to-digital conversion module includes J39 socket, AD7766 chip, resistance R41, resistance R45, capacitor C71, capacitor
C80, capacitor C57, capacitor C72, capacitor C73, the acceleration transducer are connect with the J39 socket, and the of the J39 socket
1 pin is connect with the capacitor C7 that the 12V power supply turns 9V power circuit, and the 2nd pin of the J39 socket passes through the resistance
R41 is connect with the VIN+ pin of the AD7766 chip, the 3rd pin of the J39 socket by the resistance R45 with it is described
The VIN- pin of AD7766 chip connects, after the 4th pin and the 5th pins in parallel of the J39 socket with analog signal ground wire GND
Connection, the VRef+ pin of the AD7766 chip turn the capacitor C53 of 5V power circuit with capacitor C71 and the 9V power supply respectively
One end is connect with the AVdd pin of the AD7766 chip after connection, the capacitor C80 and capacitor C57 parallel connection, the other end and mould
Quasi- signal ground GND connection；The AVdd pin of the AD7766 chip and the 9V power supply turn the capacitor C23 of 2.5V power circuit
Connection, the DVdd pin of the AD7766 chip turn the capacitor C23 and capacitor C72 of 2.5V power circuit with the 9V power supply respectively
Connection, the Vdrive pin of the AD7766 chip turn the capacitor C20 and capacitor of 3.3V power circuit with the 9V power supply respectively
C73 connection.
Wherein, J39 socket is the socket for being connected to the analog signals difference output of acceleration transducer；The acceleration sensing
Device uses 9V power supply power supply；Then acceleration transducer data are transmitted out by analog difference signal；Sensor Analog Relay System is poor
Sub-signal is connected to 24bit ADC conversion chip AD7766；To realize the number that analog difference signal is converted to SPI interface
The purpose of signal.
The analog and digital signal isolation module includes ADUM3151A chip, ACPL_M61 chip, capacitor C89, resistance
R70, resistance R71, resistance R72, resistance R73, resistance R79, capacitor C95, resistance R48, resistance R74, resistance R77, resistance R78 with
And capacitor C96, the VDD pin of the ACPL_M61 chip are connect with the VDD1 pin of the ADUM3151A chip, the resistance
R74 is connect with the Anode pin of the ACPL_M61 chip, and the Cathode of the resistance R77 and the ACPL_M61 chip draw
Foot connection, the resistance R78 are connect with the VO pin of the ACPL_M61 chip, the VDD2 pin of the ADUM3151A chip
It is connect with the Vdrive pin of the AD7766 chip, the VDD2 pin of the capacitor C89 and the ADUM3151A chip connects
It connects, the resistance R70 is connect with the SCLK pin of the ADUM3151A chip, the resistance R71 and the ADUM3151A core
The SO pin of piece connects, and the resistance R72 is connect with the nSSS pin of the ADUM3151A chip, the resistance R73 with it is described
The VOA pin of ADUM3151A chip connects, and the resistance R79 is connect with the VOB pin of the ADUM3151A chip, the electricity
Hold C95 to connect with the VDD1 pin of the ADUM3151A chip, the VIB of the resistance R48 and the ADUM3151A chip draw
Foot connection.The analog and digital signal isolation module prevents the noise of Back end data processing system to be transferred to electricity by conduction pattern
On terraced vibrating data collection circuit, the noise jamming of vibration of elevator data acquisition circuit is reduced；And by acceleration sensing
The acceleration information that device obtains is filtered, to reduce the interference of extraneous interference signal, to improve acceleration information
Accuracy, also improve vibration of elevator data acquisition circuit acquisition data accuracy.
The acceleration information obtained to acceleration transducer is filtered, to reduce the dry of extraneous interference signal
It disturbs, the filtering processing specifically: by 2000hz sample rate, 50hz notch filter first is carried out to the acceleration initial data of acquisition
Algorithm:
y50(k)=- A (1,2) * y50(k-1)-A(1,3)*y50(k-2)+B(1,1)*x(k)+B(1,2)*x(k-1)+B(1,
3) * x (k-2), wherein
X (k) is that the acceleration at k moment samples original value, y50It (k) is the acceleration information after 50hz notch filter；
A (i, j) representing matrix
A the i-th row j column data；B (i, j) representing matrix B the i-th row j column data；ω0For trapper trap frequency, 50hz, ω are takenfFor signal
Sample frequency, α are trapper coefficient, take 0.9；I.e.A (1,3)=α2；B (1,1)=1；
100hz notch filter algorithm is carried out to the acceleration information after 50hz notch filter algorithm again:
y100(k)=- C (1,2) * y100(k-1)-C(1,3)*y100(k-2)+D(1,1)*y50(k)+D(1,2)*y50(k-1)
+D(1,3)*y50(k-2)
Wherein y100It (k) is the acceleration information after 100hz notch filter；
C (i, j) representing matrix
C the i-th row j column data；D (i, j) representing matrix D the i-th row j column data；ω1For trapper trap frequency, 100hz, ω are takenfFor letter
Number sample frequency, α are trapper coefficient, take 0.9；
Finally, 100hz notch filter post-acceleration data pass through second order Chebyshev's low pass that cutoff frequency is 120hz again
Filtering, and the acceleration information of second order Chebyshev's low-pass filtering is used for a time integral and obtains three axle speed data,
The acceleration information of second order Chebyshev's low-pass filtering obtains the location information of elevator for secondary time integral.It reduces so dry
Specific gravity of the signal in useful signal is disturbed, the accuracy of acceleration information is improved.
In short, being provided with power isolation module, power circuit modulus of conversion in vibration of elevator data acquisition circuit of the invention
External power supply and the power supply of equipment are carried out isolation by block, analog and digital signal isolation module, power isolation module, so as to
The signal-to-noise ratio of hoisting elevator vibrating data collection circuit, reduces the effect of noise, and analog and digital signal isolation module will be digital
Signal and analog signal both ends are completely isolated, improve the accuracy of vibration of elevator data acquisition circuit acquisition data in this way.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (7)
1. a kind of vibration of elevator data acquisition circuit that analog and digital signal is isolated entirely, the vibration of elevator data acquisition circuit
It is connect with Back end data processing system, it is characterised in that: the vibration of elevator data acquisition circuit includes power isolation module, electricity
Source circuit conversion module, acceleration transducer, analog and digital signal isolation module and analog-to-digital conversion module, the power supply
Isolation module is isolated by external power supply, and power isolation module is connect with the power circuit conversion module, the power supply
Power supply needed for supply voltage needed for 12V power supply is converted to acceleration transducer by circuit conversion module and analog-to-digital conversion module
The analog signal data of acquisition is converted to digital signal number by the analog-to-digital conversion module by voltage, the acceleration transducer
According to the analog and digital signal isolation module is connect with the analog-to-digital conversion module and Back end data processing system respectively, institute
Stating analog and digital signal isolation module prevents the noise of Back end data processing system to be transferred to vibration of elevator by conduction pattern
On data acquisition circuit, the noise jamming of vibration of elevator data acquisition circuit is reduced.
2. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 1 is isolated entirely, special
Sign is: the power isolation module includes power module URB2412YMD-10WR3, capacitor C87, capacitor C88, electrolytic capacitor
CD17, capacitor C86, capacitor C85 and electrolytic capacitor CD16, the capacitor C87, capacitor C88, electrolytic capacitor CD17 are in parallel, institute
The one end for stating electrolytic capacitor CD17 is connect with internal electric source, and the other end of electrolytic capacitor CD17 is connect with analog signal ground wire GND,
The one end the capacitor C87 is connect with the VOUT pin of power module URB2412YMD-10WR3, the capacitor C87 other end and electricity
The VGND pin of source module URB2412YMD-10WR3 connects, and the capacitor C86, capacitor C85, electrolytic capacitor CD16 are in parallel, institute
The one end for stating electrolytic capacitor CD16 is connect with external power supply, and the other end and digital signal ground wire DGND of electrolytic capacitor CD16 connects
Connect, the one end the capacitor C85 is connect with the VIN pin of power module URB2412YMD-10WR3, the capacitor C85 other end with
The EARTH pin of power module URB2412YMD-10WR3 connects.
3. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 1 is isolated entirely, special
Sign is: the power circuit conversion module includes that 12V power supply turns 9V power circuit, 9V power supply turns 3.3V power circuit, 9V electricity
Source turns 2.5V power circuit and 9V power supply turns 5V power circuit, and the 12V power supply turns 9V power circuit and the isolated from power
Module connection, the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V power circuit, 9V power supply turns 5V power circuit one end
Turn 9V power circuit with the 12V power supply to connect, the 9V power supply turns 3.3V power circuit, 9V power supply turns 2.5V power supply electricity
Road, 9V power supply turn the 5V power circuit other end and connect with the analog-to-digital conversion module, the acceleration transducer and the 12V
Power supply turns the connection of 9V power circuit.
4. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 3 is isolated entirely, special
Sign is: the 12V power supply turn 9V power circuit include LM317DCY chip, capacitor C8, chip inductor B2, electrolytic capacitor CD3,
Capacitor C9, resistance R14, capacitor C12, resistance R11, diode D3, resistance R9, electrolytic capacitor CD2, capacitor C6, capacitor C7 and
Resistance R953；One end is connected with the capacitor C8, chip inductor B2 after the electrolytic capacitor CD3, capacitor C9 are in parallel, the other end and
The VIN pin of LM317DCY chip connects；The capacitor C8 is connect with the internal electric source of the power isolation module, the resistance
One end is connect with the ADJ pin of LM317DCY chip after R14 is in parallel with capacitor C12, and the other end and analog signal ground wire GND connect
It connects；One end is connect with the OUT pin of LM317DCY chip after the resistance R11, diode D3 parallel connection, the other end and capacitor C12
Connection；One end is connect with the one end resistance R9 after the electrolytic capacitor CD2, capacitor C6, capacitor C7 and resistance R953 parallel connection, separately
One end is connect with analog signal ground wire GND；The resistance R9 other end is connect with the diode D3；
The 9V power supply turn 3.3V power circuit include: AZ1117H-3.3TRG1 chip, capacitor C17, capacitor C18, capacitor C19,
One end and the 12V power supply turn the capacitor of 9V power circuit after capacitor C20, resistance R51, the capacitor C17, capacitor C18 are in parallel
C7 connection, the other end are connect with the IN pin of the AZ1117H-3.3TRG1 chip, the AZ1117H-3.3TRG1 chip
VOUT pin and OUT pins in parallel, one end and AZ1117H-3.3TRG1 after the capacitor C19, capacitor C20, resistance R51 are in parallel
The VOUT pin of chip connects, and the other end is connect with analog signal ground wire GND；
It includes: AZ1117EHADJ chip, capacitor C26, capacitor C27, resistance R19, resistance that the 9V power supply, which turns 2.5V power circuit,
One end and the 12V power supply turn 9V electricity after R20, capacitor C22, capacitor C23, resistance R50, the capacitor C26, capacitor C27 are in parallel
The capacitor C7 connection of source circuit, the other end are connect with the VIN pin of AZ1117EHADJ chip；The resistance R19, resistance R20 string
Connection, the one end the resistance R20 are connect with the ADJ pin of the AZ1117EHADJ chip, the other end and the AZ1117EHADJ
The OUT pin of chip connects；One end and the AZ1117EHADJ chip after the capacitor C22, capacitor C23, resistance R50 are in parallel
The connection of OUT pin, the other end connect with analog signal ground wire GND；
It includes: ADR4533ARZ chip, capacitor C50, chip inductor B9, electrolytic capacitor that the 9V power supply, which turns 5V power circuit,
CD13, capacitor C51, resistance R34, electrolytic capacitor CD14, capacitor C52, capacitor C53, the electrolytic capacitor CD13, capacitor C51 are simultaneously
One end is connected with the capacitor C50, chip inductor B9 after connection, and the other end is connect with the Vin pin of ADR4533ARZ chip；It is described
One end is connect with resistance R34 after electrolytic capacitor CD14, capacitor C52, capacitor C53 parallel connection, and the other end and analog signal ground wire GND connect
It connects, the resistance R34 is connect with the VOUT pin of the ADR4533ARZ chip.
5. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 4 is isolated entirely, special
Sign is: the analog-to-digital conversion module includes J39 socket, AD7766 chip, resistance R41, resistance R45, capacitor C71, capacitor
C80, capacitor C57, capacitor C72, capacitor C73, the acceleration transducer are connect with the J39 socket, and the of the J39 socket
1 pin is connect with the capacitor C7 that the 12V power supply turns 9V power circuit, and the 2nd pin of the J39 socket passes through the resistance
R41 is connect with the VIN+ pin of the AD7766 chip, the 3rd pin of the J39 socket by the resistance R45 with it is described
The VIN- pin of AD7766 chip connects, after the 4th pin and the 5th pins in parallel of the J39 socket with analog signal ground wire GND
Connection, the VRef+ pin of the AD7766 chip turn the capacitor C53 of 5V power circuit with capacitor C71 and the 9V power supply respectively
One end is connect with the AVdd pin of the AD7766 chip after connection, the capacitor C80 and capacitor C57 parallel connection, the other end and mould
Quasi- signal ground GND connection；The AVdd pin of the AD7766 chip and the 9V power supply turn the capacitor C23 of 2.5V power circuit
Connection, the DVdd pin of the AD7766 chip turn the capacitor C23 and capacitor C72 of 2.5V power circuit with the 9V power supply respectively
Connection, the Vdrive pin of the AD7766 chip turn the capacitor C20 and capacitor of 3.3V power circuit with the 9V power supply respectively
C73 connection.
6. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 5 is isolated entirely, special
Sign is: the analog and digital signal isolation module includes ADUM3151A chip, ACPL_M61 chip, capacitor C89, resistance
R70, resistance R71, resistance R72, resistance R73, resistance R79, capacitor C95, resistance R48, resistance R74, resistance R77, resistance R78 with
And capacitor C96, the VDD pin of the ACPL_M61 chip are connect with the VDD1 pin of the ADUM3151A chip, the resistance
R74 is connect with the Anode pin of the ACPL_M61 chip, and the Cathode of the resistance R77 and the ACPL_M61 chip draw
Foot connection, the resistance R78 are connect with the VO pin of the ACPL_M61 chip, the VDD2 pin of the ADUM3151A chip
It is connect with the Vdrive pin of the AD7766 chip, the VDD2 pin of the capacitor C89 and the ADUM3151A chip connects
It connects, the resistance R70 is connect with the SCLK pin of the ADUM3151A chip, the resistance R71 and the ADUM3151A core
The SO pin of piece connects, and the resistance R72 is connect with the nSSS pin of the ADUM3151A chip, the resistance R73 with it is described
The VOA pin of ADUM3151A chip connects, and the resistance R79 is connect with the VOB pin of the ADUM3151A chip, the electricity
Hold C95 to connect with the VDD1 pin of the ADUM3151A chip, the VIB of the resistance R48 and the ADUM3151A chip draw
Foot connection.
7. the vibration of elevator data acquisition circuit that a kind of analog and digital signal according to claim 1 is isolated entirely, special
Sign is: the acceleration information obtained to acceleration transducer is filtered, to reduce the interference of extraneous interference signal,
The filtering processing specifically: by 2000hz sample rate, the calculation of 50hz notch filter first is carried out to the acceleration initial data of acquisition
Method:
y50(k)=- A (1,2) * y50(k-1)-A(1,3)*y50(k-2)+B(1,1)*x(k)+B(1,2)*x(k-1)+B(1,3)*x
(k-2), wherein x (k) is that the acceleration at k moment samples original value, y50It (k) is the acceleration information after 50hz notch filter；
A (i, j) representing matrix A i-th
Row j column data；B (i, j) representing matrix B the i-th row j column data；ω0For trapper trap frequency, 50hz, ω are takenfFor signal sampling
Frequency, α are trapper coefficient, take 0.9；
100hz notch filter algorithm is carried out to the acceleration information after 50hz notch filter algorithm again:
y100(k)=- C (1,2) * y100(k-1)-C(1,3)*y100(k-2)+D(1,1)*y50(k)+D(1,2)*y50(k-1)+D(1,
3)*y50(k-2) wherein y100It (k) is the acceleration information after 100hz notch filter；
C (i, j) representing matrix C i-th
Row j column data；D (i, j) representing matrix D the i-th row j column data；ω1For trapper trap frequency, 100hz, ω are takenfIt is adopted for signal
Sample frequency, α are trapper coefficient, take 0.9；
Finally, 100hz notch filter post-acceleration data pass through second order Chebyshev's low pass filtered that cutoff frequency is 120hz again
Wave, and the acceleration information of second order Chebyshev's low-pass filtering is used for a time integral and obtains three axle speed data, it should
The acceleration information of second order Chebyshev's low-pass filtering obtains the location information of elevator for secondary time integral.
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