A method for synchronizing signals of multi-antenna receivers in deformation measurement of power towers

Abstract

The present invention discloses a multi-antenna receiver signal synchronization method in the deformation measurement of an electric power tower, belongs to the technical field of electric power towers, solves the problem of determining the deformation of an electric power tower, and the key points of the technical solution are that the method is to install GNSS antennas at the four feet of the tower base of the electric power tower, the four antennas are connected to the same GNSS receiver, and the receiver determines the deformation of the tower by collecting positioning data received by the four antennas. The GNSS receiver has four RTK antenna interfaces, and a working mechanism module for controlling the antenna patrol to collect positioning data is provided inside the GNSS receiver, so as to determine the deformation of the electric power tower, the system cost is low, and the measurement method is fast and accurate; the entire antenna switch switching process does not require manual intervention and is completed automatically, and the operation is safer and more reliable.

Description

Technical Field

[0001] The invention relates to the field of electric power towers, and in particular to a multi-antenna receiver signal synchronization method in deformation measurement of electric power towers. Background Art

[0002] At present, a Chinese patent with announcement number CN 106679625 B discloses a high-precision deformation monitoring method for wide-area power towers based on the Beidou system, including the following steps: judging whether it meets the real-time dynamic centimeter-level monitoring requirements according to the monitoring accuracy of the Beidou ground-based CORS network, if it meets the requirements, obtaining the tower monitoring data through the network RTK virtual reference station method; otherwise, obtaining the tower monitoring data through the dual monitoring point baseline attitude measurement method; processing and analyzing the monitoring data, calculating the tower inclination angle and settlement value; if the tower inclination angle and settlement value exceed the limit requirements of the power transmission line operation regulations, determining the tower position coordinates, and issuing on-site inspection and maintenance instructions; if the tower inclination angle and settlement value do not exceed the power transmission line operation regulations, judging the tower inclination trend.

[0003] The above solution is based on the BeiDou system and is complex to operate. It is not efficient and accurate enough in obtaining the deformation parameters of the iron scaffolding, nor is it energy-efficient enough. Summary of the invention

[0004] The purpose of the present invention is to address the shortcomings of the prior art and at least to some extent solve the technical problems in the related art, and to provide a multi-antenna receiver signal synchronization method in power tower deformation measurement, which has the advantages of being able to complete the deformation measurement of the four-corner tower, reducing the synchronization time difference, and being energy-saving and reliable.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a multi-antenna receiver signal synchronization method in the deformation measurement of an electric tower, comprising installing GNSS antennas at the supporting legs of the power tower base respectively, each GNSS antenna is connected to the same GNSS receiver, the GNSS receiver determines the deformation of the tower by collecting positioning data received by all GNSS antennas, and a working mechanism module for controlling the antenna patrol to collect positioning data is arranged inside the GNSS receiver.

[0006] Preferably, the GNSS receiver has a plurality of RTK antenna interfaces, and each RTK antenna interface is correspondingly connected to each GNSS antenna.

[0007] Preferably, the GNSS receiver is also connected to a control mainboard, and the working mechanism module includes antenna switch modules whose number is the same as the number of GNSS antennas. The control mainboard controls multiple antenna switch modules to work in turns, and one antenna switch module controls one GNSS antenna to collect signals, and the signals are collected in sequence according to the GNSS antenna serial number.

[0008] Preferably, the control main board is also connected to an RTK board, which receives respective positioning data transmitted from the GNSS antenna, thereby determining whether the tower itself is deformed based on respective data at each location.

[0009] Preferably, firstly, the GPS positioning frequency is set to f, and the period T of obtaining positioning data once is T=1 / f according to the frequency;

[0010] Then the default startup time is 0, and the switching sequence of the GNSS antenna is: antenna 1 is valid in the 0-T1 period, antenna 2 is valid in the T1-T2 period, antenna 3 is valid in the T2-T3 period, antenna 4 is valid in the T3-T4 period, and so on;

[0011] In this process, a ms-level timer is used as a time counter, and GPS data is received to supplement data and correct switching conditions, completing the synchronous measurement of each leg of the tower.

[0012] Preferably, the power tower base has four supporting legs.

[0013] Preferably, a data transmission module is connected to the control main board, the data transmission module is connected to a background server, the background server is connected to a front-end display device, and the front-end display device is used to present the collected data.

[0014] Preferably, the antenna switch module includes a control signal terminal, a transistor switch module, and a relay module. The control signal terminal is connected to the transistor switch module. The transistor switch module controls the on and off of the relay module. The normally open switch of the relay module is connected in series to the transmission line of the GNSS antenna.

[0015] Compared with the background technology, the technical effects of the present invention are mainly reflected in the following aspects:

[0016] 1. The deformation of the power tower is measured by collecting positioning data through antenna patrol. The system cost is low and the measurement method is fast and accurate.

[0017] 2. A GNSS receiver can collect the latitude, longitude and elevation information of multiple different points at the same time. The entire antenna switch switching process does not require manual intervention and is completely controlled by the CPU, making the operation safer and more reliable;

[0018] 3. The transistor is directly controlled by the general input and output pins of the control motherboard, which effectively controls a single antenna and reduces the synchronization time difference;

[0019] 4. The timer and GPS reception status jointly control the antenna switching conditions to avoid errors in the polling order. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system structure block diagram in the embodiment;

[0021] Figure 2 The circuit diagram of the antenna switch module in the embodiment;

[0022] Figure 3 It is a code flow chart of a four-antenna detection device of a GNSS receiver in an embodiment;

[0023] Figure 4 It is a flow chart of the synchronization method for measuring the four-corner iron tower in the embodiment. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0025] Example:

[0026] The number of supporting feet of the power tower base depends on the actual situation, and generally there are four. The tower with four supporting feet is used as a typical case for specific description. Based on the protection scope of the claims, we know that this solution is based on the description of the typical case, and those skilled in the art can know that this solution is also applicable to power towers of various structures, regardless of whether it is four supporting feet or other numbers of supporting feet. The explanation of the supporting feet is the corner position under the power tower.

[0027] The present invention provides a multi-antenna receiver signal synchronization method for electric power tower deformation measurement, referring to Figure 1 As shown, Figure 1 The explanation is: Antenna 1, Antenna 2, Antenna 3, and Antenna 4 are specifically GNSS antennas. GNSS antennas are installed at the supporting legs of the power tower base. Each GNSS antenna is connected to the same GNSS receiver. The GNSS receiver determines the deformation of the tower by collecting positioning data received by all GNSS antennas. A working mechanism module for controlling the antenna patrol to collect positioning data is set inside the GNSS receiver. The GNSS receiver has multiple RTK antenna interfaces, and each RTK antenna interface is connected to each GNSS antenna.

[0028] The GNSS receiver is also connected to a control mainboard. The working mechanism module includes antenna switch modules whose number is the same as the number of GNSS antennas. The control mainboard controls multiple antenna switch modules to work in turns. One antenna switch module controls one GNSS antenna for signal collection. Signals are collected in sequence according to the GNSS antenna serial number.

[0029] Combination Figure 2It can be seen that the implementation of the working mechanism module mainly depends on the antenna switch module. The antenna switch module includes control signal terminals S1-S4, a transistor switch module, and a relay module. The control signal terminal is connected to the transistor switch module, the transistor switch module controls the on and off of the relay module, and the normally open switch of the relay module is connected in series to the transmission line of the GNSS antenna. Figure 2 In the control signal terminal S1-S4, the control mainboard directly sends commands. When the level is high, the transistor switch module can be turned on, so that the relay module is powered on. In this way, according to S1-S4, the signal is sent in a cycle in sequence, so that the antenna can input the signal to the GNSS receiver in sequence. The transistor switch module uses MOS tube elements and resistors to realize the circuit bias on and off, and realizes the power on and off control of the relay coil.

[0030] The control main board is also connected to the RTK board, which receives the respective positioning data transmitted by the GNSS antenna, and thus determines whether the tower itself has deformed based on the respective data at each location.

[0031] refer to Figure 3 As shown in the figure, firstly, the equipment is powered on to configure the 4G network parameters, the frequency of collecting GPS data and other equipment parameters. According to the GPS signal received by the antenna, the positioning information is sent. The deformation monitoring process mainly polls and switches the antennas at the four corners of the tower in a clockwise direction, so as to obtain the GPS data of the four corners to determine whether the tower has deformed.

[0032] Specifically, refer to Figure 4 As shown, firstly, the GPS positioning frequency is set to f, and the period T = 1 / f of obtaining positioning data once according to the frequency;

[0033] Then the default startup time is 0, and the switching sequence of the GNSS antenna is: antenna 1 is valid in the 0-T1 period, antenna 2 is valid in the T1-T2 period, antenna 3 is valid in the T2-T3 period, antenna 4 is valid in the T3-T4 period, and so on;

[0034] In this process, a ms-level timer is used as a time counter, and GPS data is received to supplement data and correct switching conditions, completing the synchronous measurement of each leg of the tower.

[0035] The control mainboard controls the antenna switch module to switch GNSS antennas one to four in sequence to achieve the purpose of a GNSS receiver collecting latitude and longitude information and elevation information of four different points at the same time. The collection of information at four points during the signal reception process is controlled by the control mainboard. When the GNSS receiver is powered on, the control mainboard sends a control command to control the antenna switch to connect GNSS antenna one. After collecting positioning data, the antenna switch is controlled to connect GNSS antenna two, and then connect GNSS antenna three and GNSS antenna four in sequence. After collecting one cycle, the control continues to collect in sequence to obtain enough positioning data to make the measurement more accurate.

[0036] The entire antenna switch switching process does not require human intervention and is entirely controlled by the control mainboard, making the operation safer and more reliable.

[0037] The control mainboard is connected with a data transmission module, which is connected to a backend server, which is connected to a frontend display device, which is used to present the collected data. This enables data visualization, making the deformation measurement of the power tower more intuitive.

[0038] In summary, the advantages of the synchronous method for deformation measurement of the four-corner iron tower proposed in this paper are:

[0039] a. It is effective to control a single antenna by directly controlling the MOS switch through the general input and output pins of the control mainboard, thus reducing the synchronization time difference.

[0040] b. The timer and GPS reception status jointly control the antenna switching conditions to avoid errors in the polling order.

[0041] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A method for synchronizing signals of multi-antenna receivers in deformation measurement of electric power towers, characterized in that: The invention comprises installing GNSS antennas at the supporting feet of the power tower base respectively, each GNSS antenna is connected to the same GNSS receiver, the GNSS receiver determines the deformation of the tower by collecting the positioning data received by all GNSS antennas, and a working mechanism module for controlling the antenna patrol to collect positioning data is arranged inside the GNSS receiver; the GNSS receiver has a plurality of RTK antenna interfaces, and each RTK antenna interface is connected to each GNSS antenna correspondingly; The GNSS receiver is also connected to a control mainboard, and the working mechanism module includes antenna switch modules whose number is the same as the number of GNSS antennas. The control mainboard controls the multiple antenna switch modules to work in turn, and one antenna switch module controls one GNSS antenna to collect signals, and the signals are collected in sequence according to the GNSS antenna serial numbers. The control mainboard is also connected to an RTK board, which receives the respective positioning data transmitted by the GNSS antenna, and thus determines whether the tower itself is deformed according to the respective data at each location; First, set the GPS positioning frequency to f, and obtain the positioning data once according to the frequency, with a period of T=1 / f; Then the default startup time is 0, and the switching sequence of the GNSS antenna is: antenna 1 is valid in the 0-T1 period, antenna 2 is valid in the T1-T2 period, antenna 3 is valid in the T2-T3 period, antenna 4 is valid in the T3-T4 period, and so on; In this process, a ms-level timer is used as a time counter, and the GPS data is received to supplement the data and correct the switching conditions, so as to complete the synchronous measurement of each foot of the tower; the power tower has four foot parts; The antenna switch module includes a control signal end, a transistor switch module, and a relay module. The control signal end is connected to the transistor switch module. The transistor switch module controls the on and off of the relay module. The normally open switch of the relay module is serially connected to the transmission line of the GNSS antenna.

2. The method for synchronizing signals of a multi-antenna receiver in a deformation measurement of an electric power tower according to claim 1, characterized in that: The control mainboard is connected with a data transmission module, the data transmission module is connected to a background server, the background server is connected to a front-end display device, and the front-end display device is used to present the collected data.

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