CN115348484B - Automatic switching method for signal acquisition link based on self-correcting signal monitoring - Google Patents
Automatic switching method for signal acquisition link based on self-correcting signal monitoring Download PDFInfo
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- CN115348484B CN115348484B CN202210803597.8A CN202210803597A CN115348484B CN 115348484 B CN115348484 B CN 115348484B CN 202210803597 A CN202210803597 A CN 202210803597A CN 115348484 B CN115348484 B CN 115348484B
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- H—ELECTRICITY
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- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
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- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04Q2209/00—Arrangements in telecontrol or telemetry systems
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Abstract
The invention discloses a signal acquisition link automatic switching method based on self-calibration signal monitoring, which comprises the steps that firstly, a power supply information monitoring module receives power supply information through a signal acquisition link A and a signal acquisition link B, in the signal acquisition link A, the power supply information enters a main control unit after passing through a channel selector and a signal acquisition unit in the link, and meanwhile, the main control unit generates self-calibration signals; the main control unit controls the channel selector, and the power supply information and the self-calibration signal are stored after being acquired in a time-sharing way; and then, judging whether the signal acquisition link A is normal or not by the main control unit through analyzing whether the self-correction signal in the signal acquisition link A accords with the expectation. The invention can quickly find whether the acquisition link is normal in the signal acquisition process in real time, ensure the normal operation of the acquisition and transmission of the power supply information by switching the acquisition link when abnormality occurs, and improve the monitoring and reliability of the data acquisition and transmission.
Description
Technical field:
The invention relates to the field of underwater acoustic communication, in particular to an automatic switching method of a signal acquisition link based on self-correcting signal monitoring.
The background technology is as follows:
In the underwater sound signal receiving system, the reliability and maintainability of the underwater sound signal receiving system can be improved by monitoring the power supply information in real time. With the continuous development of the underwater acoustic signal receiving system, the real-time monitoring of the power information of the underwater acoustic signal receiving system becomes more important. The reliability of the power information monitoring circuit serving as the most important part of power information monitoring is the key of the power information monitoring of the underwater sound signal receiving system.
In the existing underwater acoustic signal receiving system, a conditioning and collecting circuit of power supply information of the underwater acoustic signal receiving system is not provided with a backup link, and when the circuit is abnormal, all the power supply information of the underwater acoustic signal receiving system cannot be monitored in real time. Therefore, under the condition that the power information is acquired with a backup link, a reasonable acquisition link switching basis and a switching method are found, and the method is an important step for improving the reliability of power information monitoring.
The invention comprises the following steps:
the invention aims to solve the technical problem of providing an automatic switching method of a signal acquisition link based on self-correcting signal monitoring so as to improve the monitoring property and the reliability of data acquisition and transmission.
The technical proposal of the invention is to provide a signal acquisition link automatic switching method based on self-correcting signal monitoring,
Firstly, a power supply information monitoring module receives power supply information through a signal acquisition link A and a signal acquisition link B, wherein in the signal acquisition link A, the power supply information enters a main control unit after passing through a channel selector and a signal acquisition unit in the link, and meanwhile, the main control unit generates self-correcting signals; the main control unit controls the channel selector, and the power supply information and the self-calibration signal are stored after being acquired in a time-sharing way;
Then, judging whether the signal acquisition link A is normal or not by the main control unit through analyzing whether the self-correction signal in the signal acquisition link A accords with the expectation, if the analysis result is that the signal acquisition link A is normal, reporting the power supply information acquired by the signal acquisition link A by the main control unit, and if the analysis result is that the signal acquisition link A is abnormal, switching the link to the signal acquisition link B by the main control unit;
After switching to the signal acquisition link B, the main control unit reports the power information acquired by the signal acquisition link B, the main control unit judges whether the signal acquisition link B is normal or not, and if the signal acquisition link B is abnormal, the main control unit switches the link to the signal acquisition link A and repeatedly switches the link.
Preferably, the self-calibration signal generated by the main control unit enters the main control unit after passing through the channel selector and the signal acquisition unit.
Preferably, the main control unit controls the channel selector by a time division multiplexing method.
Preferably, under the condition of single power-on, the switching times of the power information monitoring module are not more than 3 times, and switching information is reported in each switching.
Preferably, whether the self-correction signal in the signal acquisition link A accords with the expected requirement to enable the main control unit to judge whether the signal acquisition link A is normal or not is judged by the main control unit, the main control unit stores the acquired self-correction signal sampling value, calculates a high level value, a low level value and a square wave self-correction signal frequency of the self-correction signal square wave according to the self-correction signal acquisition value, and when the calculated high level value, the low level value and the square wave self-correction signal frequency of the self-correction signal square wave are inconsistent with the square wave self-correction signal generated by the circuit, the main control unit considers that the current signal acquisition link is abnormal, and then the main control unit stops reading the input signal from the current signal acquisition link and automatically switches to the other signal acquisition link.
Furthermore, under the condition of single power-on, the switching times of the power information monitoring module to the signal acquisition link are not more than 3 times, and after each switching is completed, the main control unit reports the switching information, the link switching times and the power information together in real time. If the abnormal condition occurs again after the switching for 3 times, the main control unit does not switch the link any more, and reports the information that the switching times are over for 3 times and the link abnormality is found.
That is, the technical method adopted by the scheme mainly comprises the following 3 points:
1) The main control unit automatically generates a square wave self-correcting signal with frequency F1. The main control unit transmits self-correcting signals to the input ends of the channel selector of the signal acquisition link A and the signal acquisition link B. The main control unit controls the channel selector by a time division multiplexing method and collects self-correcting signals and sensor input signals in a time-sharing mode. The main control unit stores the acquired self-correction signal sampling value, and calculates the high level value, the low level value and the square wave self-correction signal frequency F2 of the square wave of the self-correction signal according to the self-correction signal acquisition value.
2) When the calculated high level value and low level value of the square wave of the self-correcting signal, the frequency F2 of the square wave self-correcting signal and the circuit automatically generate the square wave self-correcting signal, the main control unit considers that the current signal acquisition link A is abnormal, stops reading the input signal from the signal acquisition link A, automatically switches to the link B, and reads the input signal from the signal acquisition link B instead. After switching to the B link, the method for judging whether the link B is normal by the main control unit is the same as the method for judging whether the link A is normal before switching to the B link.
3) Under the condition of single power-on, the switching times of the power information monitoring module to the signal acquisition link are not more than 3 times, and after each switching is completed, the main control unit reports the switching information, the link switching times and the power information together in real time. If the abnormal condition occurs again after the switching for 3 times, the main control unit does not switch the link any more, and reports the information that the switching times are over for 3 times and the link abnormality is found.
Compared with the prior art, the invention has the following advantages after the scheme is adopted:
The method can quickly find whether the acquisition link is normal in the signal acquisition process in real time, ensure the normal operation of the acquisition and transmission of the power supply information by switching the acquisition link when abnormality occurs, and improve the monitoring property and reliability of the data acquisition and transmission. In addition, the technical method can rapidly locate the position of the fault in the system, increase the maintainability of the system and reduce the time spent on fault removal of the system.
Description of the drawings:
FIG. 1 is a diagram showing an implementation structure of a self-control switching method of a signal acquisition link based on self-correction signal monitoring in an embodiment of the invention;
FIG. 2 is a schematic illustration of the implementation and operation of an embodiment of the present invention.
The specific embodiment is as follows:
the invention is further described in terms of specific embodiments in conjunction with the following drawings:
as shown in fig. 1 and 2, in the method for automatically switching signal acquisition links based on self-calibration signal monitoring in this embodiment, a power information monitoring module receives power information through a signal acquisition link a and a signal acquisition link B. In the signal acquisition link A and the signal acquisition link B, the power supply information is an analog voltage signal, and the power supply information enters the FPGA after passing through an analog signal selector, an operational amplifier and an analog-to-digital converter in the link. Meanwhile, the FPGA (master control unit) generates a self-correcting signal, the frequency of the self-correcting signal is 0.5HZ, the waveform is a square wave, the low level of the square wave is 0V, and the high level of the square wave is 3.3V. The self-correcting signal enters the FPGA after passing through an analog signal selector, an operational amplifier and an analog-to-digital converter, the signal in the signal acquisition link A is marked as a self-correcting signal a, and the signal in the signal acquisition link B is marked as a self-correcting signal B. The FPGA controls the channel selector through a time division multiplexing method, and the power supply information and the self-calibration signal are stored after time-sharing acquisition.
In an initial state, the FPGA only reads signals in the signal acquisition link A, including power supply information and self-correcting signals in the signal acquisition link A. After the FPGA receives the self-correction signal a, the low level V1 and the high level value V2 of the self-correction signal a are obtained through calculation. The FPGA counts the pulse width of the high and low going on by an internal 16MHZ clock. If the calculated low level V1 value accords with 0V (condition 1), the high level V2 value accords with 3.3V (condition 2), and the continuous pulse widths of the high level and the low level are 1s, the signal frequency is 0.5HZ (condition 3), the link A is judged to be normal; if 1 of the above 3 conditions are not matched, the signal acquisition link A is judged to be abnormal, at the moment, the FPGA automatically switches the link to the signal acquisition link B, meanwhile, the switching information of the link is reported through a serial port, and the number of times of switching of the link is recorded as 1.
After switching to the signal acquisition link B, the FPGA only reads the signals in the signal acquisition link B, including the power supply information and the self-correction signals in the signal acquisition link B. The processing of the signal acquisition link B by the FPGA is the same as the processing of the signal acquisition link A before switching to the signal acquisition link B. After that, if the signal acquisition link B is abnormal (the high level value, the low level value, and the continuous pulse width of the high level and the low level of the self-correcting signal B are not in accordance with any one of the conditions), the FPGA automatically switches the acquisition link to the signal acquisition link a, and meanwhile, reports the switching information of the link through the serial port, and records the number of times of switching the link 2.
Under the condition of single power-on, the number of times that the power information monitoring module switches the link is not more than 3, the switching information is reported by each time of switching the link, if the abnormal condition occurs again after switching for 3 times, the FPGA does not switch the link any more, and the switching times are over 3 times and the information of finding the abnormal link is reported.
The method is applied to the data acquisition and transmission of the power supply sensor of the underwater acoustic signal receiving system. The performance is stable and the working state is good when the device is used. Is characterized in that in the acquisition of the power supply information of the underwater acoustic signal receiving system, an automatic switching method of a signal acquisition link based on self-correcting signal monitoring is provided. The method can quickly find whether the acquisition link is normal in the signal acquisition process in real time, ensure the normal operation of the acquisition and transmission of the power supply information by switching the acquisition link when abnormality occurs, and improve the monitoring property and reliability of the data acquisition and transmission.
The foregoing is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the claims. All equivalent structures or equivalent flow path changes made by the specification of the invention are included in the protection scope of the invention.
Claims (4)
1. A signal acquisition link automatic switching method based on self-correcting signal monitoring is characterized by comprising the following steps of:
Firstly, a power supply information monitoring module receives power supply information through a signal acquisition link A and a signal acquisition link B, wherein in the signal acquisition link A, the power supply information enters a main control unit after passing through a channel selector and a signal acquisition unit in the link, and meanwhile, the main control unit generates self-correcting signals; the main control unit controls the channel selector, and the power supply information and the self-calibration signal are stored after being acquired in a time-sharing way;
Then, the main control unit judges whether the signal acquisition link A is normal by analyzing whether the self-correcting signal in the signal acquisition link A accords with the expectation, if the analysis result is that the signal acquisition link A is normal, the main control unit reports the power supply information acquired by the signal acquisition link A, and if the analysis result is that the signal acquisition link A is abnormal, the main control unit switches the link to the signal acquisition link B;
After switching to the signal acquisition link B, the main control unit reports the power information acquired by the signal acquisition link B, the main control unit judges whether the signal acquisition link B is normal or not, if the signal acquisition link B is abnormal, the main control unit switches the link to the signal acquisition link A, and the switching is repeated according to the power information
The main control unit analyzes whether the self-correcting signal in the signal acquisition link A accords with the expectation to judge whether the signal acquisition link A is normal or not, the main control unit stores the acquired self-correcting signal sampling value, calculates a high level value, a low level value and a square wave self-correcting signal frequency of the self-correcting signal square wave according to the self-correcting signal acquisition value, and when the calculated high level value, low level value and square wave self-correcting signal frequency of the self-correcting signal square wave are inconsistent with the self-correcting signal generated by the main control unit, the main control unit considers that the current signal acquisition link is abnormal, and then stops reading the input signal from the current signal acquisition link and automatically switches to another signal acquisition link; the specific operation is as follows,
The main control unit only reads the signals in the signal acquisition link A, after receiving the self-correcting signals in the link A, the main control unit calculates the low level value, the high level value and the self-correcting signal frequency of the self-correcting signals, compares the calculated low level value, the high level value and the self-correcting signal frequency with the low level value, the high level value and the self-correcting signal frequency of the self-correcting signals generated by the main control unit, and judges that the link A is normal if the calculated low level value is consistent with the low level value of the self-correcting signals generated by the main control unit and the calculated high level value is consistent with the high level value of the self-correcting signals generated by the main control unit and the calculated self-correcting signal frequency is consistent with the self-correcting signal frequency of the self-correcting signals generated by the main control unit; if 1 of the above 3 conditions are not met, the signal acquisition link A is judged to be abnormal, and the main control unit automatically switches the link to the signal acquisition link B.
2. The automatic switching method of signal acquisition links based on self-correcting signal monitoring according to claim 1, wherein: the main control unit controls the channel selector by a time division multiplexing method.
3. The automatic switching method of signal acquisition links based on self-correcting signal monitoring according to claim 1, wherein: under the condition of single power-on, the switching times of the power information monitoring module are not more than 3 times, and switching information is reported every time.
4. The method for automatically switching signal acquisition links based on self-calibration signal monitoring according to claim 3, wherein the method comprises the following steps: under the condition of single power-on, the switching times of the power information monitoring module to the signal acquisition link are not more than 3 times, and after each switching is completed, the main control unit reports the switching information, the link switching times and the power information together in real time.
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