CN114189766B - Wireless network-based synchronous acquisition method for indicator diagram and electric power diagram - Google Patents

Wireless network-based synchronous acquisition method for indicator diagram and electric power diagram Download PDF

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CN114189766B
CN114189766B CN202210064389.0A CN202210064389A CN114189766B CN 114189766 B CN114189766 B CN 114189766B CN 202210064389 A CN202210064389 A CN 202210064389A CN 114189766 B CN114189766 B CN 114189766B
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indicator
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CN114189766A (en
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韩冬月
张琼
张阳阳
杨斌
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Shenyang Zhongke Allwin Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • 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
    • H04Q9/04—Arrangements for synchronous operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture

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  • Mobile Radio Communication Systems (AREA)
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Abstract

The invention relates to a wireless network-based synchronous acquisition method for an indicator diagram and an electric power diagram. The WIA-PA RTU equipment obtains an absolute time slot number corresponding to the set acquisition time according to the received broadcast of the gateway equipment; the WIA-PA indicator equipment obtains an absolute time slot number corresponding to the set acquisition time according to the broadcast of the WIA-PA RTU equipment; the WIA-PA RTU equipment and the WIA-PA dynamometer equipment simultaneously start to acquire the electric power diagram and the electric power diagram respectively when the starting time of the time slot arrives according to the absolute time slot number corresponding to the set acquisition time, so that the synchronization of the electric power diagram and the electric power diagram is realized. Based on the synchronous function of the WIA-PA network, synchronous acquisition signals are triggered between the indicator and RTU equipment at the same time, and synchronous acquisition of an indicator diagram and an electric power diagram is ensured on the premise of not increasing energy consumption and extra circuits; when receiving the broadcast, the time slot number corresponding to the next acquisition time is calibrated for a plurality of times, and clock offset caused by crystal oscillator difference is avoided.

Description

Wireless network-based synchronous acquisition method for indicator diagram and electric power diagram
Technical Field
The invention relates to a synchronous acquisition technology in the technical field of oilfield acquisition, in particular to a method for synchronously acquiring an indicator diagram and an electric power diagram.
Background
Along with the continuous improvement of the informatization management level of the oil well, the information reflected by the oil well indicator diagram can not meet the actual production requirement, and in order to more comprehensively grasp the production and operation conditions of the ground oil extraction equipment, the balance degree, the system efficiency and the like of the ground oil extraction equipment are required to be analyzed by the electric power diagram. The generation of the electric power map needs to be defined by using the starting time and the ending time of the indicator diagram, so that the acquisition of the indicator diagram and the current diagram is started simultaneously to generate the correct electric power diagram.
The synchronous acquisition methods of the indicator diagram and the electric indicator diagram of the existing oil pumping well are mostly in a central instruction mode and are divided into a wired mode and a wireless mode. The method comprises the steps that in a wired mode, the starting acquisition time is determined by a center and is transmitted to indicator diagram acquisition equipment and electric indicator diagram acquisition equipment through an RS485 line, and the synchronization precision of the method is influenced by the length of a transmission line and the processing time of a message and is more than 100 ms; the wireless mode, by route equipment sending wireless start collection instruction, the synchronous precision of this mode also receives the transmission delay and the processing ageing influence of message, synchronous precision is the second level, and very easily takes place the message and lose the problem, when one of them equipment did not receive the start collection instruction, local synchronous collection failed. In addition, if the dynamometer is in a wired power supply mode, due to the mobility of the installation position of the dynamometer, the power line is unfixed, and potential safety hazards and the risk of easy breakage exist; if the battery is selected for power supply, the lower the power consumption is, the longer the battery is replaced, and the cost of replacing the battery is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a synchronous acquisition method for an oil well wireless acquisition network.
The technical scheme adopted by the invention for achieving the purpose is as follows: a wireless network-based synchronous acquisition method for an indicator diagram and an electric power diagram comprises the following steps:
1) The WIA-PA RTU equipment obtains an absolute time slot number corresponding to the set acquisition time according to the received broadcast of the gateway equipment; the WIA-PA indicator equipment obtains an absolute time slot number corresponding to the set acquisition time according to the broadcast of the WIA-PA RTU equipment;
2) The WIA-PA RTU equipment and the WIA-PA dynamometer equipment simultaneously start to acquire the electric power diagram and the electric power diagram respectively when the starting time of the time slot arrives according to the absolute time slot number corresponding to the set acquisition time, so that the synchronization of the electric power diagram and the electric power diagram is realized.
The step 1) is specifically as follows:
the next acquisition time of the indicator diagram and the electric power diagram is t3, and at a certain time t1, the WIA-PA RTU equipment receives the broadcast of the gateway equipment, and the absolute time slot number ASN corresponding to the next acquisition time t3 is obtained according to the corresponding relation between the geographic time of the time t1 and the absolute time slot number ASN 1;
at another time t2, the WIA-PA dynamometer receives the broadcast of the WIA-PA RTU equipment, the geographic time and the absolute time slot number ASN2 in the broadcast with the time t2, and the absolute time slot number ASN' corresponding to the next acquisition time t3 is obtained according to the corresponding relation between the geographic time and the absolute time slot number of the time t 2; the absolute time slot numbers corresponding to the WIA-PA power indicator and the WIA-PA RTU equipment in the same network at the same acquisition time t3 are the same, namely the ASN is the same as the ASN'; wherein t1< t2< t3.
The step 2) is specifically as follows:
when the time slot starting time of the absolute time slot number ASN corresponding to the acquisition time t3 arrives, the processors of the WIA-PA power indicator and the WIA-PA module in the WIA-PA RTU equipment send signals for starting acquisition level to the respective IO trigger pins;
after the processors of the WIA-PA indicator and the WIA-PA RTU respectively receive the interruption of the respective acquisition signals, the WIA-PA indicator starts to acquire the sensor values at a set acquisition interval immediately, namely the WIA-PA indicator starts to acquire acceleration and load, and the WIA-PA RTU starts to acquire current and power;
the WIA-PA indicator finds out the bottom dead center moment T and the top dead center moment of the indicator diagram according to a group of collected acceleration values, and further calculates the period T of the indicator diagram; wherein T is the time difference from the beginning of the acquisition time to the first bottom dead center time;
the WIA-PA indicator sends the indicator diagram to WIA-PA RTU equipment, the WIA-PA RTU equipment acquires the time T and period T of the bottom dead center of the indicator diagram, and the current and power values in the time T to (T+t) from the beginning of acquisition are intercepted from one group of acquired current values and power values, namely the electric power diagram synchronous with the indicator diagram.
A wireless network-based indicator diagram and electric power diagram synchronous acquisition system, comprising:
the WIA-PA RTU equipment is used for obtaining an absolute time slot number corresponding to the set acquisition time according to the received broadcast of the gateway equipment and acquiring a power map according to the time slot;
the WIA-PA indicator equipment obtains an absolute time slot number corresponding to the set acquisition time according to the broadcast of the WIA-PA RTU equipment, and acquires an indicator diagram according to the time slot so as to realize synchronous acquisition with the electric power diagram.
The WIA-PA RTU equipment is used for executing the following steps:
at a certain moment t1, receiving the broadcast of gateway equipment, and obtaining an absolute time slot number ASN corresponding to the next acquisition moment t3 according to the corresponding relation between the geographic time of the moment t1 and the absolute time slot number ASN1, so that the WIA-PA power indicator in the same network is consistent with the absolute time slot number of WIA-PA RTU equipment;
when the time slot starting time of the absolute time slot number ASN corresponding to the acquisition time t3 arrives, a processor of the WIA-PA module in the WIA-PA RTU equipment sends a signal for starting acquisition level to an IO trigger pin of the RTU module in the WIA-PA RTU equipment simultaneously with the WIA-PA power indicator;
after the processor of the RTU module in the WIA-PA RTU equipment receives the interruption of the acquisition signal, the current and the power are immediately started to be acquired at a set acquisition interval;
the WIA-PA RTU equipment receives an indicator diagram sent by the WIA-PA indicator, acquires the bottom dead center moment T and the period T of the indicator diagram, corresponds to a group of current values and power values acquired at the same time as the WIA-PA indicator, and intercepts the current and power values in the time from T to (T+t) from the moment of starting acquisition, namely, the electric power diagram synchronous with the indicator diagram.
The WIA-PA dynamometer is used for executing the following steps:
at a time t2, receiving a broadcast of WIA-PA RTU equipment, wherein the broadcast has a geographic time of the time t2 and an absolute time slot number ASN2, and obtaining an absolute time slot number ASN' corresponding to the next acquisition time t3 according to the corresponding relation between the geographic time of the time t2 and the absolute time slot number, so that a WIA-PA dynamometer in the same network is consistent with the absolute time slot number of the WIA-PA RTU equipment;
when the time slot starting time of the absolute time slot number ASN' corresponding to the acquisition time t3 arrives, a processor of a WIA-PA module in the WIA-PA dynamometer sends an acquisition starting level signal to an IO trigger pin of a processor of a dynamometer module in the WIA-PA dynamometer simultaneously with WIA-PA RTU equipment;
after a processor of a dynamometer module in the WIA-PA dynamometer receives interruption of acquisition signals, current and power are immediately acquired at a set acquisition interval;
the WIA-PA indicator finds out the bottom dead center moment T and the top dead center moment of the indicator diagram according to a group of collected acceleration values, and further calculates the period T of the indicator diagram; wherein T is the time difference from the beginning of the acquisition time to the first bottom dead center time; and sends the indicator diagram to the WIA-PA RTU device.
The invention has the following beneficial effects and advantages:
the synchronous acquisition method provided by the invention is provided on the premise of ensuring that the power consumption is not increased, has the advantage of high synchronous precision, and has the advantages that:
1. based on the WIA-PA network, the synchronous time of the wireless network is utilized, the additional overhead is not increased, and the power consumption is saved;
2. the synchronous acquisition precision of the indicator diagram and the electric diagram is 100 microseconds;
3. the indicator is added into a network through the RTU, so that the transmission of the initial moment and the value of the work diagram period is facilitated;
4. the IO pin hardware of the processor is used for triggering synchronous acquisition signals, so that the instantaneity is improved, the time delay is reduced, and the synchronous precision is ensured.
Drawings
FIG. 1 is a diagram of a network topology of the present invention;
FIG. 2 is a schematic diagram of the hardware connections of the WIA-PA dynamometer/RTU;
FIG. 3 is a schematic diagram of a WIA-PA broadcast format;
fig. 4 is a timing diagram of the synchronous acquisition of the power diagram and the power diagram.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention relates to a WIA-PA wireless network-based synchronous acquisition method for an indicator diagram and an electric power diagram. Based on the synchronous function of the WIA-PA network, synchronous acquisition signals are triggered between the indicator and RTU equipment at the same time, and synchronous acquisition of an indicator diagram and an electric power diagram is ensured on the premise of not increasing energy consumption and extra circuits; the corresponding relation between the network time and the geographic time is increased in the broadcasting, so that the acquisition time of the indicator diagram and the electric power diagram is displayed more intuitively; when receiving the broadcast, the time slot number corresponding to the next acquisition time is calibrated for a plurality of times, and clock offset caused by crystal oscillator difference is avoided.
A WIA-PA wireless network-based synchronous acquisition method for an indicator diagram and an electric power diagram specifically comprises the following steps:
the synchronous acquisition method is realized based on a WIA-PA network, and the indicator diagram acquisition equipment and the electric power diagram acquisition equipment are respectively a WIA-PA indicator and a WIA-PA RTU;
the WIA-PA dynamometer device includes:
WIA-PA module: adding a WIA-PA network to provide synchronous acquisition signals;
the dynamometer module: collecting and calculating an indicator diagram;
the WIA-PA RTU equipment comprises:
WIA-PA module: adding a WIA-PA network to provide synchronous acquisition signals;
RTU module: collecting and generating an electric power map;
the WIA-PA module triggers the dynamometer module and the RTU module to start acquisition through the IO pin;
the WIA-PA module acquires synchronous time and geographic time through a WIA-PA network;
the WIA-PA network has the corresponding relation between the geographic time and the absolute time slot number of the network in the network broadcast;
the WIA-PA module calculates the absolute time slot number corresponding to the set time according to the corresponding relation between the geographic time and the absolute time slot number of the network when receiving the broadcast;
the absolute time slot numbers corresponding to the set time calculated by the WIA-PA dynamometer and the WIA-PA module of the WIA-PA RTU are consistent, and the IO pins are triggered at the same time;
the WIA-PA dynamometer module immediately starts to collect load parameters and displacement parameters after receiving the IO pin level signals;
the WIA-PA RTU starts to collect current parameters and power parameters immediately after an RTU module receives an IO pin level signal;
the WIA-PA dynamometer module calculates the time T from the beginning time of collection to the beginning time of bottom dead center through calculation, and the period T of the indicator diagram, and transmitting the T and T to the RTU module through a message;
according to the WIA-PA RTU, an RTU module intercepts data from T to (T+t) from an acquired current and power array according to received T and T values to form an electric power diagram, and synchronous acquisition of the indicator diagram and the electric power diagram is realized.
The wireless network device according to the present invention includes: gateway device, WIA-PA dynamometer device and WIA-PA RTU device. The gateway equipment is a control center of the network and is also a clock source of the network and responsible for publishing the whole network time, scheduling network resources and collecting application data; the WIA-PA RTU is acquisition equipment in a network, is responsible for synchronizing with a gateway and acquiring an electric power diagram; the WIA-PA dynamometer equipment is also acquisition equipment in a network, is required to join the network through the RTU, is responsible for synchronizing with the RTU, acquires an indicator diagram, and provides the RTU with the starting time and the ending time of the electric power diagram. The topology is shown in fig. 1.
The connection mode of the WIA-PA module, the dynamometer module and the RTU module is shown in fig. 2. The WIA-PA module triggers a start acquisition signal through an IO pin of a self processor, namely the WIA-PA module on the dynamometer equipment and the WIA-PA module on the RTU equipment trigger the self IO pin at the same time, so that the acquisition module of the dynamometer and the acquisition module of the RTU receive the start acquisition signal at the same time and start acquisition at the same time, the whole process has no time delay, and the synchronous acquisition precision is the synchronous precision of the WIA-PA network.
The WIA-PA gateway, the WIA-PA dynamometer and the WIA-PA RTU form a topology shown in figure 1, and broadcast formats sent by the WIA-PA gateway and the WIA-PA RTU are shown in figure 3. The broadcast has geographic time, the network absolute slot number of the WIA-PA and a transmit timestamp. Wherein the transmission time stamp is used for WIA-PA network synchronization, and the synchronization precision is less than 100 microseconds; the absolute time slot number of the WIA-PA is used for identifying the number of time slots operated by the network, and each time slot is 15.625ms; the network absolute time slot number and the geographic time of the WIA-PA identify the corresponding relationship between the current network time and the geographic time.
The collection time of the work diagram of the oil pumping unit is usually the whole point and half point, and the collection time of the work diagram is the whole point and half point time if the collection period of the work diagram is half hour. At a certain moment, the WIA-PA RTU receives the broadcast of the gateway, calculates the absolute time slot number corresponding to the next acquisition moment according to the corresponding relation between the geographic time and the absolute time slot number, and supposing that the geographic time is 2021, 11, 10, 9, 10, 00 and 40961 in the received broadcast, the geographic time corresponding to the next acquisition moment should be 2021, 11, 10, 9, 30, 00 and the absolute time slot number corresponding to the geographic time is 117,761, namely, the absolute time slot number after 1200 seconds; correspondingly, at another moment, the WIA-PA dynamometer receives the broadcast of the RTU, the broadcast still has the current geographic time and absolute time slot number, the absolute time slot number corresponding to the next acquisition moment is calculated by the same method as that of the WIA-PA RTU, and because the WIA-PA dynamometer and the WIA-PA RTU are synchronous in the WIA-PA network and the synchronous precision is 100 microseconds, and meanwhile, the corresponding relation between the geographic time and the absolute time slot number is consistent, the absolute time slot number corresponding to the next acquisition moment calculated by the WIA-PA dynamometer is consistent, and is also 117761 time slot according to the assumption.
When the time slot starting time of the calculated acquisition time slot number comes, the processors of the WIA-PA modules of the dynamometer and the RTU send acquisition starting level signals to the IO trigger pins respectively; and after the processors of the dynamometer and the RTU respectively receive the interruption of the respective acquisition signals, the acquisition of the sensor values is started immediately at a certain acquisition interval, namely the dynamometer starts to acquire the acceleration and the load values. The RTU starts to collect current and power; the indicator is used for finding out the bottom dead center moment T and the top dead center moment of the indicator according to a group of collected acceleration values, and further calculating the period T of the indicator, wherein T is the time difference from the beginning of collection moment to the first bottom dead center moment. The indicator sends the indicator diagram to the RTU, the RTU acquires the time T and the period T of the bottom dead center of the indicator diagram, the RTU acquires the current and the power values in the time T to (T+t) from the beginning of acquisition in a group of acquired current values and power values, and the current and the power values are acquired, namely the electric power diagram synchronous with the indicator diagram. The above sequence is shown in fig. 4.

Claims (6)

1. The method for synchronously collecting the indicator diagram and the electric power diagram based on the wireless network is characterized by comprising the following steps:
1) The WIA-PA RTU equipment obtains an absolute time slot number corresponding to the set acquisition time according to the received broadcast of the gateway equipment; the WIA-PA indicator equipment obtains an absolute time slot number corresponding to the set acquisition time according to the broadcast of the WIA-PA RTU equipment;
2) The WIA-PA RTU equipment and the WIA-PA dynamometer equipment simultaneously start to acquire the electric power diagram and the electric power diagram respectively when the starting time of the time slot arrives according to the absolute time slot number corresponding to the set acquisition time, so that the synchronization of the electric power diagram and the electric power diagram is realized.
2. The method for synchronously collecting the indicator diagram and the electric power diagram based on the wireless network according to claim 1, wherein the step 1) is specifically as follows:
the next acquisition time of the indicator diagram and the electric power diagram is t3, and at a certain time t1, the WIA-PA RTU equipment receives the broadcast of the gateway equipment, and the absolute time slot number ASN corresponding to the next acquisition time t3 is obtained according to the corresponding relation between the geographic time of the time t1 and the absolute time slot number ASN 1;
at another time t2, the WIA-PA dynamometer receives the broadcast of the WIA-PA RTU equipment, the geographic time and the absolute time slot number ASN2 in the broadcast with the time t2, and the absolute time slot number ASN' corresponding to the next acquisition time t3 is obtained according to the corresponding relation between the geographic time and the absolute time slot number of the time t 2; the absolute time slot numbers corresponding to the WIA-PA power indicator and the WIA-PA RTU equipment in the same network at the same acquisition time t3 are the same, namely the ASN is the same as the ASN'; wherein t1< t2< t3.
3. The method for synchronously collecting the indicator diagram and the electric power diagram based on the wireless network according to claim 1, wherein the step 2) is specifically as follows:
when the time slot starting time of the absolute time slot number ASN corresponding to the acquisition time t3 arrives, the processors of the WIA-PA power indicator and the WIA-PA module in the WIA-PA RTU equipment send signals for starting acquisition level to the respective IO trigger pins;
after the processors of the WIA-PA indicator and the WIA-PA RTU respectively receive the interruption of the respective acquisition signals, the WIA-PA indicator starts to acquire the sensor values at a set acquisition interval immediately, namely the WIA-PA indicator starts to acquire acceleration and load, and the WIA-PA RTU starts to acquire current and power;
the WIA-PA indicator finds out the bottom dead center moment T and the top dead center moment of the indicator diagram according to a group of collected acceleration values, and further calculates the period T of the indicator diagram; wherein T is the time difference from the beginning of the acquisition time to the first bottom dead center time;
the WIA-PA indicator sends the indicator diagram to WIA-PA RTU equipment, the WIA-PA RTU equipment acquires the time T and period T of the bottom dead center of the indicator diagram, and the current and power values in the time T to (T+t) from the beginning of acquisition are intercepted from one group of acquired current values and power values, namely the electric power diagram synchronous with the indicator diagram.
4. An indicator diagram and electric power diagram synchronous acquisition system based on a wireless network is characterized by comprising: the WIA-PA RTU equipment is used for obtaining an absolute time slot number corresponding to the set acquisition time according to the received broadcast of the gateway equipment and acquiring a power map according to the time slot;
the WIA-PA indicator equipment obtains an absolute time slot number corresponding to the set acquisition time according to the broadcast of the WIA-PA RTU equipment, and acquires an indicator diagram according to the time slot so as to realize synchronous acquisition with the electric power diagram.
5. The wireless network-based indicator diagram and electric power diagram synchronous acquisition system of claim 4, wherein the WIA-PA RTU device is configured to perform the steps of:
at a certain moment t1, receiving the broadcast of gateway equipment, and obtaining an absolute time slot number ASN corresponding to the next acquisition moment t3 according to the corresponding relation between the geographic time of the moment t1 and the absolute time slot number ASN1, so that the WIA-PA power indicator in the same network is consistent with the absolute time slot number of WIA-PA RTU equipment;
when the time slot starting time of the absolute time slot number ASN corresponding to the acquisition time t3 arrives, a processor of the WIA-PA module in the WIA-PA RTU equipment sends a signal for starting acquisition level to an IO trigger pin of the RTU module in the WIA-PA RTU equipment simultaneously with the WIA-PA power indicator;
after the processor of the RTU module in the WIA-PA RTU equipment receives the interruption of the acquisition signal, the current and the power are immediately started to be acquired at a set acquisition interval;
the WIA-PA RTU equipment receives an indicator diagram sent by the WIA-PA indicator, acquires the bottom dead center moment T and the period T of the indicator diagram, corresponds to a group of current values and power values acquired at the same time as the WIA-PA indicator, and intercepts the current and power values in the time from T to (T+t) from the moment of starting acquisition, namely, the electric power diagram synchronous with the indicator diagram.
6. The wireless network-based indicator diagram and electric power diagram synchronous acquisition system according to claim 4, wherein the WIA-PA indicator is configured to perform the following steps:
at a time t2, receiving a broadcast of WIA-PA RTU equipment, wherein the broadcast has a geographic time of the time t2 and an absolute time slot number ASN2, and obtaining an absolute time slot number ASN' corresponding to the next acquisition time t3 according to the corresponding relation between the geographic time of the time t2 and the absolute time slot number, so that a WIA-PA dynamometer in the same network is consistent with the absolute time slot number of the WIA-PA RTU equipment;
when the time slot starting time of the absolute time slot number ASN' corresponding to the acquisition time t3 arrives, a processor of a WIA-PA module in the WIA-PA dynamometer sends an acquisition starting level signal to an IO trigger pin of a processor of a dynamometer module in the WIA-PA dynamometer simultaneously with WIA-PA RTU equipment;
after a processor of a dynamometer module in the WIA-PA dynamometer receives interruption of acquisition signals, current and power are immediately acquired at a set acquisition interval;
the WIA-PA indicator finds out the bottom dead center moment T and the top dead center moment of the indicator diagram according to a group of collected acceleration values, and further calculates the period T of the indicator diagram; wherein T is the time difference from the beginning of the acquisition time to the first bottom dead center time; and sends the indicator diagram to the WIA-PA RTU device.
CN202210064389.0A 2022-01-20 2022-01-20 Wireless network-based synchronous acquisition method for indicator diagram and electric power diagram Active CN114189766B (en)

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