CN110727228B - Weaving equipment operation monitoring system - Google Patents
Weaving equipment operation monitoring system Download PDFInfo
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- CN110727228B CN110727228B CN201911101611.4A CN201911101611A CN110727228B CN 110727228 B CN110727228 B CN 110727228B CN 201911101611 A CN201911101611 A CN 201911101611A CN 110727228 B CN110727228 B CN 110727228B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24024—Safety, surveillance
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Abstract
The invention provides a weaving equipment operation monitoring system, which comprises a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing device, a display device, a wireless communication device, a remote monitoring device, a storage device, a first characteristic extraction module, a second characteristic extraction module, a first comparison module, a second comparison module, a first alarm device and a second alarm device, wherein the vibration sensor and the signal processing circuit are used for carrying out high-precision monitoring on a vibration signal of weaving equipment, and the voltage sensor and the signal analysis module are used for carrying out high-precision monitoring on a voltage signal of a power supply circuit of the weaving equipment.
Description
Technical Field
The invention relates to the field of weaving equipment testing, in particular to a weaving equipment operation monitoring system.
Background
With the development of computer technology, communication technology and microelectronic technology, research and application on the monitoring system for the running state of weaving equipment at home and abroad have made great progress at present, and the monitoring system is developed from an original manpower monitoring mechanism to the current online monitoring system in more than ten years. On-line monitoring has the characteristics of timely data transmission, manpower resource saving and stable and reliable operation, but because data transmission mostly adopts wired networks (such as optical fibers, twisted pairs, CAN buses and the like), wiring is complicated, network maintenance is difficult, and a large amount of manpower and material resources are consumed.
The wireless sensor network based on Zigbee which is started in recent years is very suitable for the occasions with severe environment, large-area monitoring or inaccessible manpower due to the characteristics of low cost, convenient distribution and no need of maintenance. The wireless sensor network is initially applied to fields such as seabed detection, military application and forest monitoring, which are difficult to access by manpower. With the increasing maturity of wireless communication technology, microsystem technology and embedded technology, the reliability of wireless sensor networks is gradually improved, and the application range is gradually widened.
In the prior art, when monitoring weaving equipment, the test quantity is often too large, and the test precision is not high, for example, test many parameters such as the temperature, humidity, voltage, electric current of weaving equipment operation, the test parameter can not accurately reflect the running state of weaving equipment, and test system is comparatively loaded down with trivial details, need to develop a system that can only test a certain or two parameters and just can accurately monitor weaving equipment.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides a weaving equipment operation monitoring system, which includes a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing unit, a display device, a wireless communication device, a remote monitoring device, a storage device, a first feature extraction module, a second feature extraction module, a first comparison module, a second comparison module, a first alarm device, and a second alarm device, wherein the vibration sensor and the signal processing circuit are used to perform high-precision monitoring on a vibration signal of weaving equipment, and the voltage sensor and the signal analysis module are used to perform high-precision monitoring on a voltage signal of a power line of the weaving equipment.
The invention provides a weaving equipment operation monitoring system which comprises a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing device, a display device, a wireless communication device, a remote monitoring device, a storage device, a first characteristic extraction module, a second characteristic extraction module, a first comparison module, a second comparison module, a first alarm device and a second alarm device.
The vibration sensor is arranged on weaving equipment and used for detecting vibration signals of the weaving equipment during operation, the output end of the vibration sensor is connected with the input end of the signal processing circuit, the voltage sensor is arranged on a power line of the weaving equipment and used for detecting voltage signals of the weaving equipment during operation, the output end of the voltage sensor is connected with the input end of the signal analysis module, the output end of the signal processing circuit is connected with the input end of the central processing device, the output end of the signal analysis module is connected with the input end of the central processing device, the vibration sensor transmits the collected vibration signals to the signal processing circuit, the signal processing circuit transmits the received vibration signals to the central processing device after signal processing, the voltage sensor transmits the collected voltage signals to the signal analysis module, and the signal analysis module transmits the received voltage signals to the central processing device after signal analysis.
The output end of the central processing unit is connected with the input end of the first feature extraction module, the output end of the first feature extraction module is connected with the input end of the first comparison module, the output end of the first comparison module is connected with the input end of the first alarm module, the output end of the central processing unit is connected with the input end of the second feature extraction module, the output end of the second feature extraction module is connected with the input end of the second comparison module, and the output end of the second comparison module is connected with the input end of the second alarm module; the central processing device transmits the received vibration signal to a first feature extraction module, the first feature extraction module extracts a feature parameter from the received vibration signal, the first feature extraction module transmits the extracted feature parameter to a first comparison module, a threshold value of the feature parameter corresponding to the feature parameter extracted by the first feature extraction module is stored in the first comparison module, the first comparison module compares the received feature parameter with the threshold value of the feature parameter, if the received feature parameter is larger than or equal to the threshold value of the feature parameter, the first comparison module controls a first alarm device to alarm, the central processing device transmits the received voltage signal to a second feature extraction module, the second feature extraction module extracts the feature parameter from the received voltage signal, and the second feature extraction module transmits the extracted feature parameter to the second comparison module, the second comparing module is used for comparing the received characteristic parameter with the threshold value of the characteristic parameter, and if the received characteristic parameter is greater than or equal to the threshold value of the characteristic parameter, the second comparing module controls the second alarm device to alarm.
The input end of the display device is connected with the output end of the central processing device, the input end of the storage device is connected with the output end of the central processing device, the central processing device is connected with the remote monitoring device through the wireless communication device, the central processing device transmits the received vibration signals and the received voltage signals to the display device to be displayed, the central processing device transmits the received vibration signals and the received voltage signals to the storage device to be stored, and the central processing device transmits the received vibration signals and the received voltage signals to the operation monitoring device through the wireless transmission device.
Preferably, the voltage sensor is arranged on a power line of the weaving equipment, the voltage sensor is used for detecting a voltage signal of the weaving equipment during operation, the voltage sensor transmits the collected voltage signal to the signal analysis module, the signal analysis module performs denoising processing on the received voltage signal and then transmits the processed voltage signal to the central processing unit, and the signal analysis module performs denoising processing on the received voltage signal as follows:
s1: the voltage signal collected by the voltage sensor is represented as x (t), and since the voltage sensor may be mixed with a noise signal when collecting the voltage signal, the voltage signal x (t) is represented as:
wherein s (t) is a valid signal, r (t) is a noise signal,
、
is a weighting parameter;
s2: simplify the noise to power frequency signal, then have:
s3: the noise signals are subjected to quadrature separation, and the following are obtained:
thus, the voltage signal x (t) is split into three signals:
、
、
；
s4: the three separated signals are represented in a matrix form:
s5: separating the valid signal s (t) into z (t) and
by regulating
、
So as to smooth the z (t) signal, and the smoothed z (t) signal is the effective signal processed by the signal analysis module;
the signal analysis module transmits the smoothed voltage signal z (t) to the central processing unit.
Preferably, the vibration sensor is arranged on the weaving device, the vibration sensor is used for detecting vibration signals of the weaving device during operation, the collected vibration signals are converted into voltage signals V0, the voltage signals V0 are transmitted to the signal processing circuit, V1 is voltage signals processed by the signal processing circuit, the signal processing circuit comprises a signal amplification unit and a signal filtering unit, the output end of the vibration sensor is connected with the input end of the signal amplification unit, the output end of the signal amplification unit is connected with the input end of the signal filtering unit, and the output end of the signal filtering unit is connected with the input end of the central processing device.
Preferably, the signal amplifying unit includes operational amplifiers A1-A2, resistors R1-R5, and a capacitor C1.
The output end of the vibration sensor is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R1 is grounded, the other end of a resistor R1 is connected with the inverting input end of an operational amplifier A1, the other end of a resistor R1 is connected with one end of a resistor R2, the other end of a resistor R2 is connected with the output end of an operational amplifier A2, one end of a resistor R3 is connected with the output end of an operational amplifier A1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with the other end of a resistor R3, the other end of a resistor R3 is further connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is grounded, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, the other end of a resistor R4 is further connected with one end of a resistor R5, the other end of a resistor R5 is connected with the output end of an operational amplifier A2, and the output end of an operational amplifier A2 is connected with the input end of a signal filtering unit.
Preferably, the signal filtering unit includes resistors R6-R17, capacitors C2-C9, and an operational amplifier A3.
Wherein, the output end of the signal amplifying unit is connected with the non-inverting input end of an operational amplifier A3, one end of a capacitor C4 is connected with the inverting input end of an operational amplifier A3, one end of a resistor R6 is connected with one end of a resistor R7, the other end of a resistor R6 is connected with one end of a capacitor C4, one end of a resistor R9 is grounded, the other end of a resistor R9 is connected with one end of a capacitor C2, the other end of a resistor R7 is connected with the other end of a capacitor C2, the other end of a resistor R9 is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with one end of a resistor R8, the other end of a capacitor C2 is connected with the other end of a capacitor C3, the other end of a resistor R7 is connected with one end of a resistor R8, the other end of a resistor R8 is connected with the other end of a resistor R6, one end of a resistor R10 is connected with the other end of a capacitor C4, the other end of a resistor R10 is connected with the other end of a resistor R9, the other end of a resistor R38 10 is connected with one end of a capacitor C2, one end of a resistor R10 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the other end of the resistor R9, the other end of the resistor R11 is also connected to one end of a capacitor C3, one end of the resistor R11 is also connected to one end of a capacitor C11, the other end of the capacitor C11 is connected to the other end of the resistor R11, the other end of the capacitor C11 is connected to one end of the capacitor C11, one end of the resistor R11 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the capacitor C11, one end of the resistor R11 is grounded, the other end of the resistor R11 is connected to one end of the capacitor C11, the other end of the resistor R11 is connected to one end of the resistor 11, the other end of the resistor R14 is connected with the other end of the resistor R12, one end of the resistor R16 is connected with the other end of the capacitor C8, the other end of the resistor R16 is connected with the other end of the resistor R15, the other end of the resistor R16 is further connected with one end of the capacitor C6, one end of the resistor R16 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the other end of the resistor R15, the other end of the resistor R17 is further connected with one end of the capacitor C7, one end of the resistor R17 is further connected with one end of the capacitor C9, the other end of the capacitor C9 is connected with the other end of the resistor R6, the other end of the capacitor C9 is connected with the other end of the resistor R14, the other end of the capacitor C9 is further connected with the output end of the operational amplifier A3, the other end of the capacitor C9 is connected with the input end of the central processing device, and the signal filtering unit transmits the voltage signal V1 to the central processing device.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a weaving equipment operation monitoring system which comprises a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing device, a display device, a wireless communication device, a remote monitoring device, a storage device, a first characteristic extraction module, a second characteristic extraction module, a first comparison module, a second comparison module, a first alarm device and a second alarm device, wherein the vibration sensor and the signal processing circuit are used for carrying out high-precision monitoring on vibration signals of weaving equipment, and the voltage sensor and the signal analysis module are used for carrying out high-precision monitoring on voltage signals of a power supply circuit of the weaving equipment.
(2) The invention also provides a weaving equipment operation monitoring system, which is characterized in that the signals collected by the vibration sensor are weak voltage signals, so that the voltage V0 output by the vibration sensor is amplified by the signal amplification unit through an operational amplifier A1-A2, a resistor R1-R5 and a capacitor C1, and the signal amplification unit consisting of the operational amplifier A1-A2, the resistor R1-R5 and the capacitor C1 has only drift of 1.45 muV/DEG C, offset within 2 muV, 100pA bias current and noise of 2.05nV within a 0.1Hz to 10Hz broadband. The signal filtering unit uses resistors R6-R17, capacitors C2-C9 and an operational amplifier A3 to filter the amplified electric signals, so that the vibration detection precision is improved.
Drawings
FIG. 1 is a block diagram of a weaving equipment operation monitoring system of the present invention;
fig. 2 is a circuit diagram of a signal processing circuit according to the present invention.
Detailed Description
The operation monitoring system of the weaving equipment of the invention is explained in detail in the following by combining the attached drawings and embodiments.
As shown in fig. 1, the system for monitoring the operation of the weaving equipment provided by the invention comprises a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing unit, a display device, a wireless communication device, a remote monitoring device, a storage device, a first feature extraction module, a second feature extraction module, a first comparison module, a second comparison module, a first alarm device and a second alarm device.
The vibration sensor is arranged on weaving equipment and used for detecting vibration signals of the weaving equipment during operation, the output end of the vibration sensor is connected with the input end of the signal processing circuit, the voltage sensor is arranged on a power line of the weaving equipment and used for detecting voltage signals of the weaving equipment during operation, the output end of the voltage sensor is connected with the input end of the signal analysis module, the output end of the signal processing circuit is connected with the input end of the central processing device, the output end of the signal analysis module is connected with the input end of the central processing device, the vibration sensor transmits the collected vibration signals to the signal processing circuit, the signal processing circuit transmits the received vibration signals to the central processing device after signal processing, the voltage sensor transmits the collected voltage signals to the signal analysis module, and the signal analysis module transmits the received voltage signals to the central processing device after signal analysis.
The output end of the central processing unit is connected with the input end of the first feature extraction module, the output end of the first feature extraction module is connected with the input end of the first comparison module, the output end of the first comparison module is connected with the input end of the first alarm module, the output end of the central processing unit is connected with the input end of the second feature extraction module, the output end of the second feature extraction module is connected with the input end of the second comparison module, and the output end of the second comparison module is connected with the input end of the second alarm module; the central processing device transmits the received vibration signal to a first feature extraction module, the first feature extraction module extracts a feature parameter from the received vibration signal, the first feature extraction module transmits the extracted feature parameter to a first comparison module, a threshold value of the feature parameter corresponding to the feature parameter extracted by the first feature extraction module is stored in the first comparison module, the first comparison module compares the received feature parameter with the threshold value of the feature parameter, if the received feature parameter is larger than or equal to the threshold value of the feature parameter, the first comparison module controls a first alarm device to alarm, the central processing device transmits the received voltage signal to a second feature extraction module, the second feature extraction module extracts the feature parameter from the received voltage signal, and the second feature extraction module transmits the extracted feature parameter to the second comparison module, the second comparing module is used for comparing the received characteristic parameter with the threshold value of the characteristic parameter, and if the received characteristic parameter is greater than or equal to the threshold value of the characteristic parameter, the second comparing module controls the second alarm device to alarm.
The input end of the display device is connected with the output end of the central processing device, the input end of the storage device is connected with the output end of the central processing device, the central processing device is connected with the remote monitoring device through the wireless communication device, the central processing device transmits the received vibration signals and the received voltage signals to the display device to be displayed, the central processing device transmits the received vibration signals and the received voltage signals to the storage device to be stored, and the central processing device transmits the received vibration signals and the received voltage signals to the operation monitoring device through the wireless transmission device.
Specifically, the characteristic parameter may be a parameter indicating a characteristic of the signal such as a signal amplitude.
In the above embodiment, the system for monitoring operation of weaving equipment provided by the present invention includes a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing unit, a display device, a wireless communication device, a remote monitoring device, a storage device, a first feature extraction module, a second feature extraction module, a first comparison module, a second comparison module, a first alarm device, and a second alarm device, wherein the vibration sensor and the signal processing circuit are used to perform high-precision monitoring on a vibration signal of the weaving equipment, and the voltage sensor and the signal analysis module are used to perform high-precision monitoring on a voltage signal of a power supply line of the weaving equipment.
In the above embodiment, in the prior art, numerous parameters such as temperature, humidity, voltage, current and the like of the operation of the weaving equipment are tested, the test parameters cannot accurately reflect the operation state of the weaving equipment, and research shows that the abnormal vibration of the weaving equipment can be caused when the parameters such as temperature, humidity and the like of the operation of the weaving equipment are abnormal.
Specifically, voltage sensor sets up on weaving the power supply line of equipment, and voltage sensor is used for detecting the voltage signal of weaving equipment when moving, and voltage sensor transmits the voltage signal who gathers to signal analysis module, and signal analysis module is to the voltage signal transmission after removing noise processing with the voltage signal after handling to central processing unit after receiving, and signal analysis module removes noise processing's step to the voltage signal that receives as follows:
s1: the voltage signal collected by the voltage sensor is represented as x (t), and since the voltage sensor may be mixed with a noise signal when collecting the voltage signal, the voltage signal x (t) is represented as:
wherein s (t) is a valid signal, r (t) is a noise signal,
、
is a weighting parameter;
s2: simplify the noise to power frequency signal, then have:
s3: the noise signals are subjected to quadrature separation, and the following are obtained:
thus, the voltage signal x (t) is split into three signals:
、
、
；
s4: the three separated signals are represented in a matrix form:
s5: separating the valid signal s (t) into z (t) and
by regulating
、
So as to smooth the z (t) signal, and the smoothed z (t) signal is the effective signal processed by the signal analysis module;
the signal analysis module transmits the smoothed voltage signal z (t) to the central processing unit.
As shown in fig. 2, the vibration sensor is disposed on the weaving device, the vibration sensor is used for detecting a vibration signal of the weaving device during operation, the collected vibration signal is converted into a voltage signal V0, the voltage signal V0 is transmitted to the signal processing circuit, V1 is the voltage signal processed by the signal processing circuit, the signal processing circuit includes a signal amplifying unit and a signal filtering unit, an output end of the vibration sensor is connected with an input end of the signal amplifying unit, an output end of the signal amplifying unit is connected with an input end of the signal filtering unit, and an output end of the signal filtering unit is connected with an input end of the central processing unit.
Specifically, the signal amplification unit includes operational amplifiers A1-A2, resistors R1-R5, and a capacitor C1.
The output end of the vibration sensor is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R1 is grounded, the other end of a resistor R1 is connected with the inverting input end of an operational amplifier A1, the other end of a resistor R1 is connected with one end of a resistor R2, the other end of a resistor R2 is connected with the output end of an operational amplifier A2, one end of a resistor R3 is connected with the output end of an operational amplifier A1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with the other end of a resistor R3, the other end of a resistor R3 is further connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is grounded, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, the other end of a resistor R4 is further connected with one end of a resistor R5, the other end of a resistor R5 is connected with the output end of an operational amplifier A2, and the output end of an operational amplifier A2 is connected with the input end of a signal filtering unit.
Specifically, the signal filtering unit comprises resistors R6-R17, capacitors C2-C9 and an operational amplifier A3.
Wherein, the output end of the signal amplification unit is connected with the non-inverting input end of an operational amplifier A3, one end of a capacitor C4 is connected with the inverting input end of an operational amplifier A3, one end of a resistor R6 is connected with one end of a resistor R7, the other end of a resistor R6 is connected with one end of a capacitor C4, one end of a resistor R9 is grounded, the other end of a resistor R9 is connected with one end of a capacitor C2, the other end of a resistor R7 is connected with the other end of a capacitor C2, the other end of a resistor R9 is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with one end of a resistor R8, the other end of a capacitor C8 is connected with the other end of a capacitor C8, the other end of a resistor R8 is connected with one end of a resistor R8, the other end of a resistor R8 is connected with the other end of the resistor R8, and one end of the resistor C8 is connected with one end of the other end of the capacitor C8, one end of a resistor R10 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the other end of the resistor R9, the other end of the resistor R11 is also connected to one end of a capacitor C3, one end of the resistor R11 is also connected to one end of a capacitor C11, the other end of the capacitor C11 is connected to the other end of the resistor R11, the other end of the capacitor C11 is connected to one end of the capacitor C11, one end of the resistor R11 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the capacitor C11, one end of the resistor R11 is grounded, the other end of the resistor R11 is connected to one end of the capacitor C11, the other end of the resistor R11 is connected to one end of the resistor 11, the other end of the resistor R14 is connected with the other end of the resistor R12, one end of the resistor R16 is connected with the other end of the capacitor C8, the other end of the resistor R16 is connected with the other end of the resistor R15, the other end of the resistor R16 is further connected with one end of the capacitor C6, one end of the resistor R16 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the other end of the resistor R15, the other end of the resistor R17 is further connected with one end of the capacitor C7, one end of the resistor R17 is further connected with one end of the capacitor C9, the other end of the capacitor C9 is connected with the other end of the resistor R6, the other end of the capacitor C9 is connected with the other end of the resistor R14, the other end of the capacitor C9 is further connected with the output end of the operational amplifier A3, the other end of the capacitor C9 is connected with the input end of the central processing device, and the signal filtering unit transmits the voltage signal V1 to the central processing device.
In the above embodiment, the noise of the signal processing circuit is within 2.05nV, the drift is 1.45 μ V/DEG C, the models of the operational amplifiers A1-A2 are all LT1012, and the model of the operational amplifier A3 is LT 1192.
In the signal amplifying unit, the resistance of the resistor R1 is 10k Ω, the resistance of the resistor R2 is 100k Ω, the resistance of the resistor R3 is 14.7k Ω, the resistance of the resistor R4 is 10k Ω, the resistance of the resistor R5 is 10k Ω, and the capacitance of the capacitor C1 is 1 μ F.
In the signal amplifying unit, the resistances of the resistors R1 and R4 are as described above, wherein the resistor R1, the resistor R3 and the operational amplifier a1 form a voltage feedback operational amplifying circuit, the capacitor C1, the resistors R4-R5 and the operational amplifier a2 form a current feedback operational amplifying circuit, the circuit feedback operational amplifying circuit has a gain, the current feedback operational amplifying circuit can operate in a unity gain state if the resistor R4 is not connected during a specific test, the operating speed of the current feedback operational amplifying circuit can be slowed down if the resistor R4 is connected, but the gain of the current feedback operational amplifying circuit can be stabilized, the RC network between the voltage feedback operational amplifying circuit and the current feedback operational amplifying circuit can also play roles of slowing down the gain speed and stabilizing the gain to prevent self-excited oscillation, further, the capacitors can be connected in parallel to two ends of the resistor R2 to slow down the circuit speed, the overall gain of the signal amplifying unit is determined by the resistors R1-R2, and the values of the resistors R4-R5 determine the maximum output swing of the voltage feedback operational amplifying circuit.
In the signal filtering unit, the resistance of the resistor R6 is 1.7k Ω, the resistance of the resistor R7 is 1.47 Ω, the resistance of the resistor R8 is 1.47 Ω, the resistance of the resistor R9 is 10 Ω, the resistance of the resistor R10 is 1.47 Ω, the resistance of the resistor R11 is 1.47 Ω, the resistance of the resistor R12 is 1.7k Ω, the resistance of the resistor R13 is 1.47 Ω, the resistance of the resistor R14 is 1.47 Ω, the resistance of the resistor R15 is 10 Ω, the resistance of the resistor R16 is 1.47 Ω, the resistance of the resistor R17 is 1.47 Ω, the capacitance of the capacitor C2 is 1 μ F, the capacitance of the capacitor C3 is 1 μ F, the capacitance of the capacitor C4 is 0.1 μ F, the capacitance of the capacitor C5 is 0.1 μ F, the capacitance of the capacitor C6 is 1 μ F, the capacitance of the capacitor C7 is 1 μ F, the capacitor C8 μ F is 0.8232 μ F, and the capacitance of the capacitor C9 is 0.42 μ F.
In the signal filtering unit, the Q value of the signal filtering unit can be adjusted by adjusting the resistor R6 and the resistor R9, at R6 > R9, the resistor R6 has little effect on the center frequency of the signal filter unit, but it acts to increase the leakage current of the capacitor C2 and the capacitor C3 in the signal filter unit, therefore, the sharpness of the output signal is affected, and similarly, when the resistance R7= R8= R10= R11 < R9, the resistor R9 acts to increase the equivalent resistance of the capacitor C4 and the capacitor C5, which also affects the sharpness of the output signal, and therefore, under the combined action of the resistor R6 and the resistor R9, the sharpness of the output signal can be adjusted, therefore, the signal filtering unit provided by the invention can effectively adjust the output signal, so that the frequency response of the output signal of the signal filtering unit becomes more reasonable.
In the signal filtering unit, the output signals of the signal filtering unit are respectively adjusted by using two symmetrical filtering networks (one is composed of resistors R6-R11 and capacitors C2-C5, and the other is composed of resistors R12-R17 and capacitors C6-C11), so that the temperature drift of the signal filtering unit in the temperature change of a test environment is further inhibited, and a better filtering effect is achieved compared with the prior art.
In the above embodiment, since the signal collected by the vibration sensor is a weak voltage signal, the signal amplification unit amplifies the voltage V0 output by the vibration sensor through the operational amplifier a1-a2, the resistor R1-R5 and the capacitor C1, and the signal amplification unit composed of the operational amplifier a1-a2, the resistor R1-R5 and the capacitor C1 has only drift of 1.45 μ V/° C, offset within 2 μ V, 100pA bias current and noise of 2.05nV within a wide band of 0.1Hz to 10 Hz. The signal filtering unit uses resistors R6-R17, capacitors C2-C9 and an operational amplifier A3 to filter the amplified electric signals, so that the vibration detection precision is improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A weaving equipment operation monitoring system is characterized by comprising a vibration sensor, a signal processing circuit, a voltage sensor, a signal analysis module, a central processing unit, a display device, a wireless communication device, a remote monitoring device, a storage device, a first feature extraction module, a second feature extraction module, a first comparison module, a second comparison module, a first alarm device and a second alarm device;
wherein, the vibration sensor is arranged on the weaving equipment and used for detecting vibration signals of the weaving equipment during operation, the output end of the vibration sensor is connected with the input end of the signal processing circuit, the voltage sensor is arranged on the power circuit of the weaving equipment and used for detecting voltage signals of the weaving equipment during operation, the output end of the voltage sensor is connected with the input end of the signal analysis module, the output end of the signal processing circuit is connected with the input end of the central processing device, the output end of the signal analysis module is connected with the input end of the central processing device, the vibration sensor transmits the collected vibration signals to the signal processing circuit, and the signal processing circuit processes the received vibration signals and then transmits the processed signals to the central processing device, the voltage sensor transmits the acquired voltage signal to the signal analysis module, and the signal analysis module analyzes the received voltage signal and transmits the analyzed voltage signal to the central processing unit;
the output end of the central processing unit is connected with the input end of the first feature extraction module, the output end of the first feature extraction module is connected with the input end of the first comparison module, the output end of the first comparison module is connected with the input end of the first alarm device, the output end of the central processing unit is connected with the input end of the second feature extraction module, the output end of the second feature extraction module is connected with the input end of the second comparison module, and the output end of the second comparison module is connected with the input end of the second alarm device; the central processing device transmits the received vibration signal to the first feature extraction module, the first feature extraction module extracts a feature parameter from the received vibration signal, the first feature extraction module transmits the extracted feature parameter to the first comparison module, a threshold value of the feature parameter corresponding to the feature parameter extracted by the first feature extraction module is stored in the first comparison module, the first comparison module compares the received feature parameter with the threshold value of the feature parameter, if the received feature parameter is greater than or equal to the threshold value of the feature parameter, the first comparison module controls the first alarm device to alarm, the central processing device transmits the received voltage signal to the second feature extraction module, and the second feature extraction module extracts the feature parameter from the received voltage signal, the second feature extraction module transmits the extracted feature parameters to the second comparison module, the second comparison module stores a threshold of the feature parameters corresponding to the feature parameters extracted by the second feature extraction module, the second comparison module compares the received feature parameters with the threshold of the feature parameters, and if the received feature parameters are greater than or equal to the threshold of the feature parameters, the second comparison module controls the second alarm device to perform alarm operation;
the input end of the display device is connected with the output end of the central processing device, the input end of the storage device is connected with the output end of the central processing device, the central processing device is connected with the remote monitoring device through the wireless communication device, the central processing device transmits received vibration signals and voltage signals to the display device for displaying, the central processing device transmits the received vibration signals and voltage signals to the storage device for storing, and the central processing device transmits the received vibration signals and voltage signals to the remote monitoring device through the wireless transmission device.
2. The system for monitoring the operation of the weaving equipment as claimed in claim 1, wherein the voltage sensor is disposed on a power line of the weaving equipment, the voltage sensor is configured to detect a voltage signal of the weaving equipment during operation, the voltage sensor transmits the collected voltage signal to the signal analysis module, the signal analysis module performs denoising processing on the received voltage signal and then transmits the processed voltage signal to the central processing unit, and the signal analysis module performs denoising processing on the received voltage signal as follows:
s1: the voltage signal collected by the voltage sensor is represented as x (t), and since the voltage sensor is mixed with a noise signal when collecting the voltage signal, the voltage signal x (t) is represented as:
wherein s (t) is a valid signal, r (t) is a noise signal,
、
is a weighting parameter;
s2: simplify the noise to power frequency signal, then have:
s3: the noise signals are subjected to quadrature separation, and the following are obtained:
thus, the voltage signal x (t) is split into three signals:
、
、
；
s4: the three separated signals are represented in a matrix form:
s5: separating the valid signal s (t) into z (t) and
by regulating
、
So as to smooth the z (t) signal, and then the smoothed z (t) signal is the effective signal processed by the signal analysis module;
the signal analysis module transmits the smoothed voltage signal z (t) to the central processing device.
3. The system for monitoring the operation of the weaving equipment as claimed in claim 1, wherein the vibration sensor is disposed on the weaving equipment, the vibration sensor is configured to detect a vibration signal generated when the weaving equipment is in operation, convert the collected vibration signal into a voltage signal V0, and transmit the voltage signal V0 to the signal processing circuit, V1 is the voltage signal processed by the signal processing circuit, the signal processing circuit includes a signal amplifying unit and a signal filtering unit, an output end of the vibration sensor is connected to an input end of the signal amplifying unit, an output end of the signal amplifying unit is connected to an input end of the signal filtering unit, and an output end of the signal filtering unit is connected to an input end of the central processing device.
4. The weaving equipment operation monitoring system of claim 3, characterized in that the signal amplification unit comprises operational amplifiers A1-A2, resistors R1-R5, and a capacitor C1;
the output end of the vibration sensor is connected with the non-inverting input end of an operational amplifier A1, one end of a resistor R1 is grounded, the other end of the resistor R1 is connected with the inverting input end of an operational amplifier A1, the other end of a resistor R1 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the output end of an operational amplifier A2, one end of a resistor R3 is connected with the output end of an operational amplifier A1, one end of a capacitor C1 is grounded, the other end of a capacitor C1 is connected with the other end of a resistor R3, the other end of a resistor R3 is further connected with the non-inverting input end of an operational amplifier A2, one end of a resistor R4 is grounded, the other end of a resistor R4 is connected with the inverting input end of an operational amplifier A2, the other end of a resistor R4 is further connected with one end of a resistor R5, the other end of a resistor R5 is connected with the output end of an operational amplifier A2, and the output end of an operational amplifier A2 is connected with the input end of the signal filter unit.
5. The weaving equipment operation monitoring system of claim 4, characterized in that the signal filtering unit comprises resistors R6-R17, capacitors C2-C9, and an operational amplifier A3;
wherein, the output end of the signal amplifying unit is connected with the non-inverting input end of an operational amplifier A3, one end of a capacitor C4 is connected with the inverting input end of an operational amplifier A3, one end of a resistor R6 is connected with one end of a resistor R7, the other end of a resistor R6 is connected with one end of a capacitor C4, one end of a resistor R9 is grounded, the other end of a resistor R9 is connected with one end of a capacitor C2, the other end of a resistor R7 is connected with the other end of a capacitor C2, the other end of a resistor R9 is connected with one end of a capacitor C3, the other end of a capacitor C3 is connected with one end of a resistor R8, the other end of a capacitor C2 is connected with the other end of a capacitor C3, the other end of a resistor R7 is connected with one end of a resistor R8, the other end of a resistor R8 is connected with the other end of a resistor R6, one end of a resistor R10 is connected with the other end of a capacitor C4, the other end of a resistor R10 is connected with the other end of a resistor R9, and the other end of a resistor R10 is connected with one end of the capacitor C2, one end of a resistor R10 is connected to one end of a resistor R11, the other end of a resistor R11 is connected to the other end of a resistor R9, the other end of a resistor R11 is also connected to one end of a capacitor C3, one end of a resistor R11 is also connected to one end of a capacitor C5, the other end of a capacitor C5 is connected to the other end of a resistor R6, the other end of a capacitor C5 is connected to the other end of a resistor R8, the other end of a capacitor C5 is connected to one end of a capacitor C8, one end of a resistor R12 is connected to one end of a resistor R13, the other end of a resistor R12 is connected to one end of a capacitor C8, one end of a resistor R15 is grounded, the other end of a resistor R15 is connected to one end of a capacitor C6, the other end of a resistor R13 is connected to the other end of a capacitor C6, the other end of a resistor R15 is connected to one end of a capacitor C7, the other end of a capacitor C7 is connected to one end of a resistor R14, the other end of a capacitor C6 is connected to the other end of a capacitor C7, and one end of a resistor R13 is connected to one end of a resistor R14, the other end of the resistor R14 is connected with the other end of the resistor R12, one end of the resistor R16 is connected with the other end of the capacitor C8, the other end of the resistor R16 is connected with the other end of the resistor R15, the other end of the resistor R16 is further connected with one end of the capacitor C6, one end of the resistor R16 is connected with one end of the resistor R17, the other end of the resistor R17 is connected with the other end of the resistor R15, the other end of the resistor R17 is further connected with one end of the capacitor C7, one end of the resistor R17 is further connected with one end of the capacitor C9, the other end of the capacitor C9 is connected with the other end of the resistor R6, the other end of the capacitor C9 is connected with the other end of the resistor R14, the other end of the capacitor C9 is further connected with the output end of the operational amplifier A3, the other end of the capacitor C9 is connected with the input end of the central processing device, and the signal filtering unit transmits the voltage signal V1 to the central processing device.
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