Method for testing dual-mode module HRF channel based on Bluetooth

Abstract

The invention relates to the technical field of intelligent acquisition of a low-voltage transformer area, and discloses a method for testing a dual-mode module HRF channel based on Bluetooth, which comprises the following steps: starting an HRF-to-Bluetooth device to carry out wireless frequency sweeping, searching HRF network information on different frequency points and reporting the information to an intelligent terminal, selecting a monitored HRF network by the intelligent terminal and sending the monitored HRF network to the HRF-to-Bluetooth device, and sending the HRF-to-Bluetooth device to the HRF-to-Bluetooth device. The HRF-to-Bluetooth device monitors HRF network information and sends the HRF network information to the intelligent terminal, the intelligent terminal displays the message density of the position, and the higher the density is, the better the signal quality of the position is. According to the method, the position with good wireless signal quality in the transformer area can be quickly determined, the problem that the slave nodes cannot communicate is efficiently solved by moving invalid communication node equipment, the success rate of data acquisition is improved, the additional equipment cost caused by additional signal conversion equipment is avoided, the operation is simple and easy to master, the personal safety is guaranteed, and the operation cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent acquisition in low-voltage power distribution areas, and particularly to a method for testing the HRF channel of a dual-mode module based on Bluetooth. Background Art

[0002] Intelligent acquisition in low-voltage power distribution areas has widely used the HPLC and HRF dual-mode technologies. HPLC conducts carrier communication based on the power line channel, and HRF conducts communication wirelessly. Through this dual-mode technology, communication link topologies are formed by distributed terminal nodes in low-voltage power distribution areas, and then various service functions such as network maintenance and data acquisition are realized. There are phenomena of signal attenuation, irregular impedance characteristics, and irregular noise characteristics in the HPLC power distribution area, resulting in nodes that cannot communicate in the low-voltage power distribution area. HRF communicates wirelessly, making up for the defect of HPLC communication failure. Adopting the HPLC+HRF dual-mode communication method can ensure a stable communication link and ensure the communication success rate.

[0003] Due to the phenomena of path propagation loss, shadow fading, and multipath fading in the HRF channel, the HPLC+HRF dual-mode communication method cannot completely solve all communication failure nodes, and there are phenomena where both the HPLC channel and the HRF channel fail or the HRF signal quality is poor, resulting in the inability to meet the service requirements of acquisition success rate and high-frequency acquisition. When the prior art addresses the problem of both the HPLC channel and the HRF channel failing or the HRF signal quality being poor in a dual-mode power distribution area, the following methods are usually adopted: 1. Connect an external signal conversion device. This method directly connects the signal conversion device to the low-voltage power system, which may cause problems with the safe operation of the power system.

[0004] 2. Increasing the wireless signal power of the module can solve this problem, but it will affect the service life of the components.

[0005] 3. Using a signal analysis device to analyze the characteristics of the communication channel has high requirements for the professional ability of the operator and low efficiency. Summary of the Invention

[0006] In view of the deficiencies and defects existing in the prior art, the present invention provides a method for testing the HRF channel of a dual-mode module based on Bluetooth. This method analyzes the wireless signal quality near the devices of communication failure nodes in the power distribution area through an HRF-to-Bluetooth device to find positions that support effective communication, thereby solving the problem of communication failure.

[0007] The object of the present invention can be achieved through the following technical solutions: A method for testing the HRF channel of a dual-mode module based on Bluetooth, comprising the following steps: Step 1: Establish a Bluetooth connection between the intelligent terminal and the HRF-to-Bluetooth device; Step 2: Through Bluetooth, the smart terminal sends a start frequency sweep command to the HRF-to-Bluetooth device via Bluetooth, and the HRF-to-Bluetooth device searches for HRF network information on different frequency points; Step 3: Through Step 2, the HRF-to-Bluetooth device sends all the searched HRF network information to the smart terminal via Bluetooth; Step 4: Based on all the HRF network information in Step 3, select the HRF network to be monitored. The smart terminal sends the HRF network information to the HRF-to-Bluetooth device via Bluetooth, and the HRF-to-Bluetooth device sets the monitored HRF network information for fixed frequency point monitoring; Step 5: Through Step 4, monitor the HRF network packets: wireless beacon frame packets and reduced beacon frame packets; Step 6: The HRF-to-Bluetooth device sends the monitored HRF network packets to the smart terminal via Bluetooth, and the smart terminal displays the packet density within a unit time; Step 7: Repeating Step 2 to Step 6 can obtain the packet density in different physical spaces.

[0008] Further, in Step 1, the smart terminal and the HRF-to-Bluetooth device communicate data via Bluetooth, where the HRF-to-Bluetooth device supports two-way signal forwarding, and the smart terminal can be a mobile phone or other embedded devices.

[0009] Further, in Step 2, for the power distribution areas where the HRF network information is unknown, the HRF-to-Bluetooth device searches for the HRF network on different frequency points, sets the start frequency sweep, and the time period of the frequency sweep can be configured.

[0010] Further, in Step 2, for the power distribution areas where the HRF network information is known, fixed frequency sweep points and the monitored HRF network addresses can be set.

[0011] Further, in Step 3, after the frequency sweep ends, the HRF-to-Bluetooth device sends all the searched HRF network information to the smart terminal via Bluetooth, where the HRF network information includes the HRF network address and the HRF network operating frequency point.

[0012] Further, in Step 4, if there is no wireless signal at the power distribution area location, the HRF-to-Bluetooth device will send a command to the smart terminal via Bluetooth after the frequency sweep ends, informing that there is no valid HRF network information, where the HRF network information includes: the HRF network operating frequency point and the HRF network main node address.

[0013] Further, in Step 5, the wireless beacon frame packets and the reduced beacon frame packets are the packet formats specified in the protocol "Dual-Mode Communication Interconnection and Interworking Technical Specification Part 4-2: Data Link Layer Communication Protocol", and the HRF slave nodes access the network through the wireless beacon frames and the reduced beacon frames.

[0014] Further, in step 6, the greater the message density per unit time represents that the location is closer to the signal source, the better the signal quality, and the more it can meet the requirements of efficient and stable communication.

[0015] Further, in step 7, the wireless signal strengths in different physical spaces of the substation area are different. By repeating steps 2, 3, 4, 5, and 6, the wireless message densities in different physical spaces of the substation area are obtained.

[0016] By the above method, the present invention does not require an external signal conversion device. Only by moving the communication failure node device to a location with good wireless signal quality can the invalid communication problem be solved. Since the HRF-to-Bluetooth device is used and does not need to be directly connected to the low-voltage power system, the operation is safe. The intelligent terminal can efficiently and conveniently analyze the communication failure node by connecting to the HRF-to-Bluetooth device through Bluetooth, thereby improving the data acquisition success rate, reducing the operation and maintenance cost, and the operation is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the connection structure of the test equipment of the present invention.

[0018] Figure 2 It is a flowchart of the test method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0020] As Figure 1 shown, the test equipment of the present invention includes an intelligent terminal and an HRF-to-Bluetooth device. The intelligent terminal and the HRF-to-Bluetooth device perform data communication through Bluetooth. Among them, the HRF-to-Bluetooth device supports two-way signal forwarding, and the intelligent terminal can be a mobile phone or other embedded devices. By setting a wireless frequency scanning command through the HRF-to-Bluetooth device, monitoring the wireless signal message density of the HRF network at a specific frequency point, finding a location that can support wireless communication, and moving the communication failure node device to a location with good wireless signal quality, thereby solving the problem of communication failure of the slave node.

[0021] As Figure 2 shown, a method for testing the HRF channel of a dual-mode module based on Bluetooth includes the following steps when applied: The intelligent terminal connects to the HRF-to-Bluetooth device via Bluetooth and sends a command to start wireless frequency scanning. The HRF-to-Bluetooth device searches for HRF network information on different frequency points; for the areas where the HRF network information is unknown, the HRF-to-Bluetooth device searches for HRF networks on different frequency points, sets the start of frequency scanning, and the time period of frequency scanning can be configured; for the areas where the HRF network information is known, fixed frequency scanning points and the monitored HRF network addresses can be set.

[0022] After the frequency scanning is completed, the HRF-to-Bluetooth device reports all the searched HRF network information to the intelligent terminal via Bluetooth, where the HRF network information includes the HRF network address and the HRF network operating frequency point.

[0023] The intelligent terminal selects the HRF network to be monitored and sends a command to inform the HRF-to-Bluetooth device to monitor the specified HRF network; if there is no wireless signal at the area location, the HRF-to-Bluetooth device will send a command to the intelligent terminal via Bluetooth after the frequency scanning is completed, informing that there is no valid HRF network information.

[0024] The HRF-to-Bluetooth device sets the HRF network frequency point according to the specified HRF network information, and at the same time monitors the standard beacon frame message and the simplified beacon frame message; because the HRF slave node accesses the network through wireless beacon frames and simplified beacon frames, the wireless beacon frame message and the simplified beacon frame message are the message formats specified in the protocol "Dual-Mode Communication Interconnection and Intercommunication Technical Specification Part 4-2: Data Link Layer Communication Protocol".

[0025] The HRF-to-Bluetooth device sends the monitored standard beacon frames and simplified beacon frames to the intelligent terminal via Bluetooth; the intelligent terminal displays the message density within a unit time. The greater the message density, the closer the position is to the signal source, the better the signal quality, and the more it can meet the requirements of efficient and stable communication.

[0026] Move the position and repeat the above steps to obtain and compare the message densities in different physical spaces of the area, and move the nodes that cannot communicate or have a low communication success rate to the position with the best signal to make them re-enter the network.

[0027] Through the intelligent terminal and the HRF-to-Bluetooth device, the present invention monitors the wireless message densities at different positions in the area, can quickly determine the physical space positions with good wireless signal quality, efficiently solves the problem that the slave nodes cannot communicate, and improves the success rate of data collection. It realizes non-contact testing, avoids the direct contact between the external signal conversion device and the low-voltage area, is simple to operate and easy to master, and ensures personal safety; by moving the ineffective communication node device to the position with good signal to achieve node wireless communication, it reduces the operation cost and avoids the additional equipment cost.

[0028] The above embodiments are illustrative of the specific embodiments of the present invention and not a limitation thereof. Those skilled in the relevant art can make various transformations and changes without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions. Therefore, all equivalent technical solutions should fall within the scope of patent protection of the present invention.

Claims

1. A method for testing the HRF channel of a dual-mode module based on Bluetooth, characterized in that: The following steps are involved: Step 1: The smart terminal establishes a Bluetooth connection with the HRF-to-Bluetooth device; the smart terminal and the HRF-to-Bluetooth device communicate data via Bluetooth, the HRF-to-Bluetooth device supports two-way signal forwarding, and the smart terminal can be a mobile phone or other embedded devices; Step 2: The smart terminal sends a start frequency scanning command to the HRF to Bluetooth device via Bluetooth, and the HRF to Bluetooth device searches for HRF network information at different frequencies; Step 3: Through step 2, the HRF to Bluetooth device sends all the HRF network information found to the smart terminal via Bluetooth; Step 4: Based on all the HRF network information in step 3, select the HRF network to be monitored. The intelligent terminal sends the HRF network information to the HRF to Bluetooth device via Bluetooth. The HRF to Bluetooth device is set to monitor the HRF network information and perform fixed frequency monitoring. Step 5: Through step 4, monitor the messages of the HRF network, including wireless beacon frame messages and simplified beacon frame messages; Step 6: The HRF to Bluetooth device sends the monitored HRF network message to the smart terminal via Bluetooth, and the smart terminal displays the message density per unit time. The greater the message density per unit time, the closer the distance to the signal source is, the better the signal quality is, and the more it can meet the needs of efficient and stable communication. Step 7: By repeating steps 2, 3, 4, 5, and 6, the message density of different physical spaces in the station area is obtained, and then the physical space location with good wireless signal quality is determined.

2. A method for testing the HRF channel of a dual-mode module based on Bluetooth according to claim 1, characterized in that: In step 1, the smart terminal and the HRF to Bluetooth device perform data communication via Bluetooth. The HRF to Bluetooth device supports two-way signal forwarding. The smart terminal may be a mobile phone or other embedded devices.

3. A method for testing the HRF channel of a dual-mode module based on Bluetooth according to claim 1, characterized in that: In step 2, for areas where the HRF network frequency is unknown, the HRF to Bluetooth device searches for HRF networks on different frequencies, sets to start frequency scanning, and the time period of the frequency scanning can be configured; for areas where the HRF network frequency is known, a fixed frequency scanning frequency is set.

4. A method for testing the HRF channel of a dual-mode module based on Bluetooth according to claim 1, characterized in that: In step 3, after the frequency scanning is completed, the HRF to Bluetooth device sends all the searched HRF network information to the smart terminal via Bluetooth, wherein the HRF network information includes the HRF network address and the HRF network operating frequency.

5. A method for testing the HRF channel of a dual-mode module based on Bluetooth according to claim 1, characterized in that: In step 4, if there is no wireless signal at the station location, the HRF to Bluetooth device will send a command to the smart terminal via Bluetooth after the frequency scanning is completed, informing that there is no valid HRF network information; the HRF network information includes the HRF network operating frequency and the HRF network master node address.

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