CN109029506B - Signal acquisition method and system - Google Patents
Signal acquisition method and system Download PDFInfo
- Publication number
- CN109029506B CN109029506B CN201810770094.9A CN201810770094A CN109029506B CN 109029506 B CN109029506 B CN 109029506B CN 201810770094 A CN201810770094 A CN 201810770094A CN 109029506 B CN109029506 B CN 109029506B
- Authority
- CN
- China
- Prior art keywords
- average value
- value
- time period
- set time
- current values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 106
- 238000005070 sampling Methods 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims abstract description 33
- 238000012935 Averaging Methods 0.000 claims description 33
- 230000002159 abnormal effect Effects 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 abstract description 22
- 238000003745 diagnosis Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 description 3
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 2
- 101150102866 adc1 gene Proteins 0.000 description 2
- 101150042711 adc2 gene Proteins 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
- G01D1/02—Measuring arrangements giving results other than momentary value of variable, of general application giving mean values, e.g. root means square values
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention provides a signal acquisition method and a signal acquisition system. The method comprises the steps of simultaneously acquiring the same measurement signal for n times for the same measured point, and processing the acquired signal to obtain an initial value of the measurement signal; n is not less than 2 and n is an integer; the same measured point is subjected to the same measurement signal acquisition for n times at the same time according to the sampling period, and the acquired signal is processed to obtain the current value of the measurement signal; calculating and displaying the average value of the current values and the change rate of the average value in a first set time period, a second set time period and a third set time period; displaying the initial value and the current value, and repeatedly executing the steps after obtaining the initial value. The signal acquisition method can more accurately and comprehensively reflect the condition of the measurement signal, thereby ensuring the accuracy of subsequent measurement signal processing and use, improving the accuracy of equipment state monitoring and reducing the error rate of equipment state diagnosis under the condition that the measurement signal is used for equipment state monitoring.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal acquisition method and system.
Background
The status signal of a device or system contains important information for its status identification and fault diagnosis, and accurate and reliable extraction of the status signal is the basis for fault diagnosis. In order to ensure that a device or system operates smoothly and safely, the status signals of the device or system must be accurately and reliably collected. Complex or critical installations generally have associated condition monitoring devices, since they cause serious damage in the event of a malfunction, rather than an unscheduled shutdown. In order to accurately and reliably monitor the state of the equipment, the acquisition of the state signals of the equipment must be accurate and reliable and is not interfered by noise.
The traditional signal acquisition method usually measures the state signal of the measured object by only one sensor, has poor acquisition accuracy and reliability, and cannot ensure the accuracy of subsequent signal processing and use. In addition, errors can be generated due to the working principle, the manufacturing process, functional materials, external environmental factors, human factors and the like of the sensor, so that the measurement result is inaccurate and unreliable. The inaccurate or unreliable state signal can not accurately diagnose the state of the equipment, and the diagnosis error rate is high.
Therefore, how to ensure the accuracy and reliability of the acquired signal in the signal acquisition process has become a problem to be solved urgently at present.
Disclosure of Invention
The present invention provides a signal acquisition method and system for solving the above technical problems in the prior art. The signal acquisition method can more accurately and comprehensively reflect the condition of the measurement signal, thereby ensuring the accuracy of subsequent measurement signal processing and use, improving the accuracy of equipment state monitoring and reducing the error rate of equipment state diagnosis under the condition that the measurement signal is used for equipment state monitoring.
The invention provides a signal acquisition method, which comprises the following steps:
step S10: the same measurement signal acquisition is carried out on the same measured point for n times at the same time, and the acquired signal is processed to obtain the initial value of the measurement signal; n is not less than 2 and n is an integer;
step S11: the same measuring signal is collected for the same measured point for n times at the same time according to the sampling period, and the collected signal is processed to obtain the current value of the measuring signal;
step S12: calculating the average value of the current values, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period; the first set time period is less than the second set time period, and the second set time period is less than the third set time period;
step S13: displaying the initial value, the current value, the average value, the rate of change of the average value in the first set period of time, the rate of change of the average value in the second set period of time, and the rate of change of the average value in the third set period of time;
the steps S11 to S13 are repeatedly executed.
Preferably, the step S12 is followed by: judging whether the currently acquired signal is abnormal; if yes, alarming and displaying the abnormal state of the signal; if not, displaying the signal normal state.
Preferably, when n is 2, the determining whether the currently acquired signal is abnormal includes:
calculating the absolute value of the difference between the two current values;
comparing whether the absolute value is greater than a set multiple of the average value of the current value;
if yes, determining that the currently acquired signal is abnormal; and if not, determining that the currently acquired signal is normal.
Preferably, the rate of change of the average value over the first set period of time
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the first set time period;
the change rate of the average value in the second set time period
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the second set time period;
the change rate of the average value in the third set time period
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the third set time period.
Preferably, the processing the acquired signals comprises:
performing analog-to-digital conversion on the acquired signals;
filtering the analog-to-digital converted signal;
and calibrating the filtered signal.
The present invention also provides a signal acquisition system, comprising:
the acquisition processing module is used for acquiring the same measurement signal for n times at the same time for the same measured point and processing the acquired signal to obtain an initial value of the measurement signal; n is not less than 2 and n is an integer; the same measuring signal is collected for the same measured point for n times at the same time according to the sampling period, and the collected signal is processed to obtain the current value of the measuring signal;
the calculation module is used for calculating the average value of the current value, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period; the first set time period is less than the second set time period, and the second set time period is less than the third set time period;
and the display module is used for displaying the initial value, the current value, the average value, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period and the change rate of the average value in the third set time period.
Preferably, the system further comprises a judging module for judging whether the currently acquired signal is abnormal;
the alarm module is used for alarming when the currently acquired signal is abnormal;
the display module is also used for displaying the signal abnormal state and the signal normal state.
Preferably, n is 2, and the determining module includes:
a calculation unit for calculating an absolute value of a difference between the two current values;
and the comparison determining unit is used for comparing whether the absolute value is larger than a set multiple of the average value of the current value or not and determining whether the currently acquired signal is abnormal or not according to a comparison result.
Preferably, the rate of change of the average value over the first set period of time
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the first set time period;
the change rate of the average value in the second set time period
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the second set time period;
the change rate of the average value in the third set time period
Wherein the content of the first and second substances,
is the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired for the respective sampling periods before the third set time period.
Preferably, the acquisition processing module includes:
the conversion unit is used for carrying out analog-to-digital conversion on the acquired signals;
the filtering unit is used for filtering the signals after the analog-to-digital conversion;
and the calibration unit is used for calibrating the filtered signals.
The invention has the beneficial effects that: according to the signal acquisition method and the signal acquisition system, the acquired signals are processed to obtain the initial value, the current value, the average value, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period and the change rate of the average value in the third set time period, so that the condition of the measurement signals can be reflected more accurately and comprehensively, the accuracy of subsequent measurement signal processing and use is ensured, the accuracy of equipment state monitoring can be improved and the error rate of equipment state diagnosis is reduced under the condition that the measurement signals are used for equipment state monitoring.
Drawings
Fig. 1 is a flowchart of a signal acquisition method in embodiment 1 of the present invention;
fig. 2 is a flowchart of a signal acquisition method in embodiment 2 of the present invention;
fig. 3 is a flowchart of step S12' in the signal acquisition method according to embodiment 2 of the present invention;
fig. 4 is a schematic block diagram of a signal acquisition system in embodiment 3 of the present invention.
Wherein the reference numbers indicate:
1. an acquisition processing module; 11. a conversion unit; 12. a filtering unit; 13. a calibration unit; 2. a calculation module; 3. a display module; 4. a judgment module; 41. a calculation unit; 42. a comparison determination unit; 5. and an alarm module.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, a signal acquisition method and system provided by the present invention are further described in detail below with reference to the accompanying drawings and the detailed description.
Example 1:
the present embodiment provides a signal acquisition method, as shown in fig. 1, including:
step S10: the same measurement signal acquisition is carried out on the same measured point for n times at the same time, and the acquired signal is processed to obtain the initial value of the measurement signal; n is not less than 2 and n is an integer.
In the step, in order to acquire the same measurement signal for n times at the same time, n sensors are arranged at a measured point, and each sensor is used for acquiring the same measurement signal.
In the present embodiment, n is preferably 2.
Step S11: and acquiring the same measuring signal for n times at the same time for the same measured point according to the sampling period, and processing the acquired signal to obtain the current value of the measuring signal.
In this step, let the frequency of the measurement signal be f, and the sampling frequency be fs，2f<fs<100kHz。
Step S12: and calculating the average value of the current values, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period. The first set time period is less than the second set time period, and the second set time period is less than the third set time period.
In this step, the average value of the current values is the average of the current values of all the measurement signals acquired in the sampling period; such as: the current Value of the measurement signal collected in the sampling period is Value1cAnd Value2cAverage of the current values
Preferably, the first set period of time is 1 minute, the second set period of time is 30 minutes, and the third set period of time is 1 hour. Of course, each set time period is not limited to the above value, and may be other values.
In this step, the rate of change of the average value in the first set period of time
Wherein the content of the first and second substances,
is the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the first set time period to obtain a value; such as: the first set time period is 1 minute, the rate of change of the average value within 1 minute
The value obtained for averaging the average of the current values of the measurement signals acquired at each sampling period 1 minute ago.
Rate of change of the average value in a second set period of time
Wherein the content of the first and second substances,
is the average of the current values;
obtained by averaging the average values of the current values of the measurement signals acquired in each sampling period before the second set time periodA value of (d); such as: the second set time period is 30 minutes, the rate of change of the average value within 30 minutes
The value obtained for averaging the average of the current values of the measurement signals acquired for each sampling period 30 minutes ago.
Rate of change of average value in third set period of time
Wherein the content of the first and second substances,
is the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the third set time period to obtain a value; such as: the third set time period is 1 hour, the change rate of the average value in 1 hour
The value obtained by averaging the average values of the current values of the measurement signals acquired at each sampling period 1 hour before.
In this embodiment, the average value of the current values, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period, and the change rate of the average value in the third set time period can more accurately and comprehensively reflect the condition of the measurement signal, so that the accuracy of subsequent measurement signal processing and use is ensured, the accuracy of equipment state monitoring can be improved, and the error rate of equipment state diagnosis can be reduced under the condition that the measurement signal is used for equipment state monitoring.
Step S13: displaying an initial value, a current value, an average value, a change rate of the average value in a first set period of time, a change rate of the average value in a second set period of time, and a change rate of the average value in a third set period of time.
Step S11 to step S13 are repeatedly executed.
The repeated execution of the steps S11 to S13 can ensure that the measurement signal acquired in each sampling period can obtain the current value, the average value, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period, and the change rate of the average value in the third set time period, thereby ensuring that the measurement signal acquired in each sampling period can more accurately and comprehensively reflect the condition of the measurement signal, further ensuring the accuracy of subsequent measurement signal processing and use, and improving the accuracy of equipment state monitoring and reducing the error rate of equipment state diagnosis under the condition that the measurement signal is used for equipment state monitoring.
In the signal acquisition method provided in embodiment 1, the acquired signal is processed to obtain an initial value, a current value, an average value, a change rate of the average value in a first set time period, a change rate of the average value in a second set time period, and a change rate of the average value in a third set time period, so that the condition of the measurement signal can be more accurately and comprehensively reflected, the accuracy of subsequent measurement signal processing and use is ensured, and the accuracy of device state monitoring can be improved and the error rate of device state diagnosis can be reduced when the measurement signal is used for device state monitoring.
Example 2:
based on the signal acquisition method provided in embodiment 1, this embodiment provides a signal acquisition method, as shown in fig. 2, including:
step S10: the same measurement signal acquisition is carried out on the same measured point for n times at the same time, and the acquired signal is processed to obtain the initial value of the measurement signal; n is not less than 2 and n is an integer.
In the step, in order to acquire the same measurement signal for n times at the same time, n sensors are arranged at a measured point, and each sensor is used for acquiring the same measurement signal.
In the present embodiment, n is preferably 2.
Step S11: and acquiring the same measuring signal for n times at the same time for the same measured point according to the sampling period, and processing the acquired signal to obtain the current value of the measuring signal.
In this step, let the frequency of the measurement signal be f, and the sampling frequency be fs，2f<fs<100kHz。
Step S12: and calculating the average value of the current values, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period. The first set time period is less than the second set time period, and the second set time period is less than the third set time period.
In this step, the average value of the current values is the average of the current values of all the measurement signals acquired in the sampling period; such as: the current Value of the measurement signal collected in the sampling period is Value1cAnd Value2cAverage of the current values
Preferably, the first set period of time is 1 minute, the second set period of time is 30 minutes, and the third set period of time is 1 hour. Of course, each set time period is not limited to the above value, and may be other values.
In this embodiment, the average value of the current values, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period, and the change rate of the average value in the third set time period can more accurately and comprehensively reflect the condition of the measurement signal, so that the accuracy of subsequent measurement signal processing and use is ensured, the accuracy of equipment state monitoring can be improved, and the error rate of equipment state diagnosis can be reduced under the condition that the measurement signal is used for equipment state monitoring.
Step S13: displaying an initial value, a current value, an average value, a change rate of the average value in a first set period of time, a change rate of the average value in a second set period of time, and a change rate of the average value in a third set period of time.
Step S11 to step S13 are repeatedly executed.
The repeated execution of the steps S11 to S13 can ensure that the measurement signal acquired in each sampling period can obtain the current value, the average value, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period, and the change rate of the average value in the third set time period, thereby ensuring that the measurement signal acquired in each sampling period can more accurately and comprehensively reflect the condition of the measurement signal, further ensuring the accuracy of subsequent measurement signal processing and use, and improving the accuracy of equipment state monitoring and reducing the error rate of equipment state diagnosis under the condition that the measurement signal is used for equipment state monitoring.
The signal acquisition method further includes, after step S12:
step S12': and judging whether the currently acquired signal is abnormal. If so, step S12' is performed: alarms and displays a signal abnormal state in step S13. If not, a signal normal state is displayed in step S13.
The setting of the step S12 'and the step S12' can carry out alarm prompt on the abnormal condition of the current acquired signal so as to prompt whether the acquired signal is available or not, thereby improving the accuracy of the acquired signal.
In this embodiment, as shown in fig. 3, when n is 2, step S12' includes:
step S120: the absolute value of the difference of the two current values is calculated.
Step S121: comparing whether the absolute value is greater than a set multiple of the average value of the current values.
The multiple is set to 0.1 in this step, but may be other multiples.
If so, namely
Step S122 is executed: and determining that the currently acquired signal is abnormal. If not, step S123 is executed: and determining that the currently acquired signal is normal.
In this embodiment, processing the acquired signal includes:
and performing analog-to-digital conversion on the acquired signals.
In the step, for example: the collected signals (analog signals) S1 and S2 are converted into digital quantities (digital signals) ADC1 and ADC2 by a 12-bit analog-to-digital converter.
The analog-to-digital converted signal is filtered.
In this step, filtering can improve the accuracy of the acquired signal. The specific algorithm for filtering the analog-to-digital converted signal is as follows: such as: the algorithm for filtering the ADC1 signal is
The algorithm for filtering the ADC2 signal is
Wherein the power N of the signal noises 2＝(ADC1-ADC2)2。
And calibrating the filtered signal.
In this step, the calibration can improve the accuracy of the acquired signal. The specific signal calibration process is as follows: selecting a coefficient k1And k2The numerical quantities ADCConValue1 and ADCConValue2 are calibrated, and Value1 ═ k1×ADCConValue1，Value2＝k2xADCConValue 2, where Value1 and Value2 are the calibrated measurements.
In this embodiment, in step S10, Value1 and Value2 obtained by processing the acquired signal are used as initial values of the measurement signal. After step S10, Value1 and Value2 obtained by processing the signal collected in each sampling period are respectively used as the current Value of the measurement signal in each sampling period, that is, Value1cAnd Value2c。
The beneficial effects of the embodiments 1-2 are that the signal acquisition method provided in the embodiments 1-2 can more accurately and comprehensively reflect the condition of the measurement signal by processing the acquired signal to obtain the initial value, the current value, the average value, the change rate of the average value in the first set time period, the change rate of the average value in the second set time period and the change rate of the average value in the third set time period, thereby ensuring the accuracy of subsequent measurement signal processing and use, and improving the accuracy of equipment state monitoring and reducing the error rate of equipment state diagnosis when the measurement signal is used for equipment state monitoring.
Example 3:
based on the signal acquisition method provided in embodiment 2, this embodiment provides a signal acquisition system, as shown in fig. 4, including: the acquisition processing module 1 is used for acquiring the same measurement signal for n times at the same time for the same measured point and processing the acquired signal to obtain an initial value of the measurement signal; n is not less than 2 and n is an integer; and according to the sampling period, the same measured point is subjected to the same measurement signal acquisition for n times at the same time, and the acquired signal is processed to obtain the current value of the measurement signal. And the calculating module 2 is used for calculating the average value of the current values, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period. The first set time period is less than the second set time period, and the second set time period is less than the third set time period. And the display module 3 is used for displaying the initial value, the current value, the average value, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period.
Wherein, the change rate of the average value in the first set time period
Wherein the content of the first and second substances,
is the average of the current values;
the value obtained by averaging the average value of the current values of the measurement signals acquired at sampling periods before the first set time period. The first set period of time is preferably 1 minute.
Average value at the second set timeRate of change within segment
Wherein the content of the first and second substances,
is the average of the current values;
the value obtained by averaging the average value of the current values of the measurement signals acquired at sampling periods before the second set time period. The second set period of time is preferably 30 minutes.
Rate of change of average value in third set period of time
Wherein the content of the first and second substances,
is the average of the current values;
the value obtained by averaging the average value of the current values of the measurement signals acquired at each sampling period before the third set time period. The third set period of time is preferably 1 hour.
By arranging the acquisition processing module 1, the calculation module 2 and the display module 3, the initial value, the current value, the average value, the change rate of the average value in a first set time period, the change rate of the average value in a second set time period and the change rate of the average value in a third set time period can be acquired and obtained, and the data of the measurement signal can more accurately and comprehensively reflect the condition of the measurement signal, so that the accuracy of subsequent measurement signal processing and use is ensured, the accuracy of equipment state monitoring can be improved and the error rate of equipment state diagnosis is reduced under the condition that the measurement signal is used for equipment state monitoring.
In this embodiment, the signal acquisition system further includes a determining module 4, configured to determine whether a currently acquired signal is abnormal. And the alarm module 5 is used for giving an alarm when the currently acquired signal is abnormal. The display module 3 is also used for displaying the signal abnormal state and the signal normal state.
The judgment module 4 and the alarm module 5 can give an alarm prompt to the abnormal condition of the currently acquired signal to prompt whether the acquired signal is available, so that the accuracy of the acquired signal is improved.
Wherein n is 2, the determining module 4 includes: a calculation unit 41 for calculating the absolute value of the difference of the two current values. And the comparison determining unit 42 is used for comparing whether the absolute value is larger than a set multiple of the average value of the current value or not and determining whether the currently acquired signal is abnormal or not according to the comparison result. Preferably, the multiple is set to 0.1.
In this embodiment, the acquisition processing module 1 includes: and the conversion unit 11 is used for performing analog-to-digital conversion on the acquired signals. And a filtering unit 12 for filtering the analog-to-digital converted signal. And a calibration unit 13, configured to calibrate the filtered signal. The filtering unit 12 and the calibration unit 13 are arranged, so that the accuracy of the acquired signals can be improved.
Beneficial effects of example 3: the signal acquisition system provided in embodiment 3, by providing the acquisition processing module, the calculation module, and the display module, can acquire and obtain an initial value, a current value, an average value, a change rate of the average value in a first set time period, a change rate of the average value in a second set time period, and a change rate of the average value in a third set time period, and these data of the measurement signal can more accurately and comprehensively reflect the condition of the measurement signal, thereby ensuring the accuracy of subsequent measurement signal processing and use, and when the measurement signal is used for device state monitoring, the accuracy of device state monitoring can be improved, and the error rate of device state diagnosis can be reduced.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A method of signal acquisition, comprising:
step S10: the same measurement signal acquisition is carried out on the same measured point for n times at the same time, and the acquired signal is processed to obtain the initial value of the measurement signal; n is not less than 2 and n is an integer;
step S11: the same measuring signal is collected for the same measured point for n times at the same time according to the sampling period, and the collected signal is processed to obtain the current value of the measuring signal;
step S12: calculating the average value of the current values, the value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a first set time period, the value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a second set time period, and the value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a third set time period, calculating the change rate of the average value of the current values in the first set time period based on the average value of the current values and the value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before the first set time period, and calculating the change rate of the average value of the current values in the second set time period based on the average value of the current values and the average value obtained by averaging the current values of the measurement signals acquired in each sampling period before the second set time period, calculating the change rate of the average value of the current value in a third set time period according to the average value of the current value and the value obtained by averaging the average value of the current value of the measurement signal acquired in each sampling period before the third set time period; the first set time period is less than the second set time period, and the second set time period is less than the third set time period;
step S13: displaying the initial value, the current value, the average value of the current values, the change rate of the average value of the current values in the first set time period, the change rate of the average value of the current values in the second set time period and the change rate of the average value of the current values in the third set time period;
the steps S11 to S13 are repeatedly executed.
2. The signal acquisition method according to claim 1, further comprising, after the step S12: judging whether the currently acquired signal is abnormal; if yes, alarming and displaying the abnormal state of the signal; if not, displaying the signal normal state.
3. The signal acquisition method according to claim 2, wherein when n is 2, the determining whether the currently acquired signal is abnormal includes:
calculating the absolute value of the difference between the two current values;
comparing whether the absolute value is larger than a set multiple of the average value of the current value;
if yes, determining that the currently acquired signal is abnormal; and if not, determining that the currently acquired signal is normal.
4. The signal acquisition method according to claim 1, wherein a rate of change of an average value of current values in the first set period of time
Wherein the content of the first and second substances,
is the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the first set time period to obtain a value;
the change rate of the average value of the current values in the second set time period
Wherein the content of the first and second substances,
the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the second set time period to obtain a value;
the rate of change of the average value of the current values in the third set period of time
Wherein the content of the first and second substances,
the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired in the respective sampling periods before the third set time period.
5. The signal acquisition method of claim 1, wherein the processing the acquired signals comprises:
performing analog-to-digital conversion on the acquired signals;
filtering the analog-to-digital converted signal;
and calibrating the filtered signal.
6. A signal acquisition system, comprising:
the acquisition processing module is used for acquiring the same measurement signal for n times at the same time for the same measured point and processing the acquired signal to obtain an initial value of the measurement signal; n is not less than 2 and n is an integer; the same measuring signal is collected for the same measured point for n times at the same time according to the sampling period, and the collected signal is processed to obtain the current value of the measuring signal;
a calculating module, configured to calculate an average value of current values, a value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a first set time period, a value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a second set time period, a value obtained by averaging the average value of the current values of the measurement signals acquired in each sampling period before a third set time period, a change rate of the average value of calculated current values obtained by averaging the average value of current values according to the average value of current values and the average value of the current values of the measurement signals acquired in each sampling period before the first set time period in the first set time period, and a change rate of the average value of calculated current values obtained by averaging the average value of current values and the average value of the current values of the measurement signals acquired in each sampling period before the second set time period in the second set time period, calculating the change rate of the average value of the current value in a third set time period according to the average value of the current value and the value obtained by averaging the average value of the current value of the measurement signal acquired in each sampling period before the third set time period; the first set time period is less than the second set time period, and the second set time period is less than the third set time period;
and the display module is used for displaying the initial value, the current value, the average value of the current value, the change rate of the average value of the current value in the first set time period, the change rate of the average value of the current value in the second set time period and the change rate of the average value of the current value in the third set time period.
7. The signal acquisition system of claim 6, further comprising a determination module for determining whether the currently acquired signal is abnormal;
the alarm module is used for alarming when the currently acquired signal is abnormal;
the display module is also used for displaying the signal abnormal state and the signal normal state.
8. The signal acquisition system of claim 7, wherein the n-2, the determining module comprises:
a calculation unit for calculating an absolute value of a difference between the two current values;
and the comparison determining unit is used for comparing whether the absolute value is larger than a set multiple of the average value of the current value or not and determining whether the currently acquired signal is abnormal or not according to the comparison result.
9. The signal acquisition system of claim 6 wherein the rate of change of the average of the current values over the first set period of time
Wherein the content of the first and second substances,
is the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the first set time period to obtain a value;
the change rate of the average value of the current values in the second set time period
Wherein the content of the first and second substances,
the average of the current values;
averaging the average value of the current values of the measurement signals acquired in each sampling period before the second set time period to obtain a value;
the rate of change of the average value of the current values in the third set period of time
Wherein the content of the first and second substances,
the average of the current values;
a value obtained by averaging the average value of the current values of the measurement signals acquired in the respective sampling periods before the third set time period.
10. The signal acquisition system of claim 6 wherein the acquisition processing module comprises:
the conversion unit is used for carrying out analog-to-digital conversion on the acquired signals;
the filtering unit is used for filtering the signals after the analog-to-digital conversion;
and the calibration unit is used for calibrating the filtered signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770094.9A CN109029506B (en) | 2018-07-13 | 2018-07-13 | Signal acquisition method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770094.9A CN109029506B (en) | 2018-07-13 | 2018-07-13 | Signal acquisition method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029506A CN109029506A (en) | 2018-12-18 |
| CN109029506B true CN109029506B (en) | 2021-08-17 |
Family
ID=64642468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810770094.9A Active CN109029506B (en) | 2018-07-13 | 2018-07-13 | Signal acquisition method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109029506B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110278534A (en) * | 2019-07-08 | 2019-09-24 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | Underground space roof sinking monitoring device |
| CN113483869B (en) * | 2021-07-02 | 2022-08-02 | 河北农业大学 | Sheep weight detection system and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL84902A (en) * | 1987-12-21 | 1991-12-15 | D S P Group Israel Ltd | Digital autocorrelation system for detecting speech in noisy audio signal |
| JP2001117593A (en) * | 1999-10-20 | 2001-04-27 | Victor Co Of Japan Ltd | Device and method for audio synchronous encoding |
| CN100504950C (en) * | 2006-03-14 | 2009-06-24 | 上海微电子装备有限公司 | Synchronous high-precision calibrating method for pulse wave intensity sampling |
| CN102590683B (en) * | 2012-02-27 | 2015-02-18 | 浙江大学 | Online diagnosing and early warning method for current-carrying faults of power equipment |
| CN103399283B (en) * | 2013-08-23 | 2015-10-07 | 中国兵器工业集团第二一四研究所苏州研发中心 | Utilize the method that feedback transmitter optimization data gathers |
| CN107655624B (en) * | 2017-09-13 | 2020-06-09 | 南京航伽电子科技有限公司 | Pressure transmitter monitoring method |
-
2018
- 2018-07-13 CN CN201810770094.9A patent/CN109029506B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109029506A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109029506B (en) | Signal acquisition method and system | |
| CN110531033B (en) | Method and device for monitoring online moisture measurement accuracy and moisture measurement system | |
| JP5425027B2 (en) | Random noise signal detection and filtering method | |
| CN116735804A (en) | Intelligent sensor precision monitoring system based on Internet of things | |
| KR102247116B1 (en) | Data processing method, data processing device, and data processing program | |
| CN117421610B (en) | Data anomaly analysis method for electric energy meter running state early warning | |
| JP2013073414A (en) | Sensor diagnostic device and sensor diagnostic method for plant | |
| EP2762923B1 (en) | Radiation meter | |
| CN107218955A (en) | Field apparatus and detector | |
| CN114199451A (en) | Pressure detection method and system based on temperature compensation and storage medium | |
| CN111476206A (en) | Universal analog quantity processing method and system | |
| CN107607144B (en) | Sensor baseline drift correction method and detection equipment | |
| CN116878831A (en) | Bolt loosening monitoring method and monitoring device | |
| CN108536777A (en) | A kind of data processing method, server cluster and data processing equipment | |
| CN110186560B (en) | Ultraviolet numerical value correction method and system | |
| US10316690B2 (en) | Method for validation of an investigated sensor and corresponding machine | |
| CN113919611A (en) | Sampling method, device and computer readable storage medium | |
| CN112305406A (en) | Chip micro analog signal testing method and device | |
| CN110850353A (en) | Calibration method of instrument checking device of mutual inductor | |
| JP2002131439A (en) | Deterioration diagnosing device for semiconductor detector | |
| CN116007663B (en) | Method and system for real-time calculation of proximity sensor for undercarriage retraction system | |
| CN215579597U (en) | Temperature and humidity monitoring device in switch cabinet | |
| EP4293366A1 (en) | Signal processing circuit, controller, environment forming device, and signal processing method | |
| CN111811561B (en) | Method for measuring background noise of optical fiber sensor demodulation device | |
| JP2005102351A (en) | Insulation deterioration diagnostic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |