Adaptive power adjusting method for indoor Bluetooth positioning base station

Abstract

The invention discloses a self-adaptive power regulation method for indoor Bluetooth positioning base stations, which is characterized in that a Bluetooth signal regulation base station is fixedly arranged on the central ground of at least two Bluetooth positioning base stations; a signal strength detection module in the Bluetooth signal adjusting base station detects the strength of a positioning signal sent by the Bluetooth positioning base station in real time, compares the power of a real-time positioning signal with the power of an initial positioning signal to obtain a detection difference value, and when the absolute value of the detection difference value exceeds a maximum allowable error threshold value, the Bluetooth positioning base station adjusts the positioning signal according to the detection difference value. If yes, a power adjusting signal sending module generates a power adjusting signal and sends the power adjusting signal to a power adjusting control module of the Bluetooth positioning base station, the signal sending power of a positioning signal sending module of the Bluetooth positioning base station is correspondingly increased or decreased, and adjustment is stopped until the absolute value of the detection difference value is smaller than the maximum allowable error threshold value; the method has the advantages of being high in positioning accuracy, small in environmental influence and capable of guaranteeing reliable positioning accuracy for a long time.

Description

Technical Field

[0001] The invention relates to a method for adjusting equipment parameters, in particular to a method for adaptively adjusting power of an indoor Bluetooth positioning base station. Background Art

[0002] At present, the principle of indoor Bluetooth positioning is as follows: the ceiling of a 100-square-meter room is evenly divided into four positioning areas, and a Bluetooth positioning base station with a signal coverage radius of 5 meters is placed in the center of each positioning area; the Bluetooth beacon that needs to be located is a beacon card device with wireless transmission function installed on a person or an AGV car. After receiving the signal of the Bluetooth positioning base station, the Bluetooth beacon will automatically report the unique ID of the Bluetooth beacon and the location information contained in the signal received from the Bluetooth positioning base station to the background. The background service can restore the position and movement trajectory of the Bluetooth beacon that needs to be located through the ID identification and the location information generated when the Bluetooth beacon moves. In this way, indoor positioning with a certain degree of accuracy can be achieved; but in the actual deployment and application process, this solution has corresponding Defects: In factories or other indoor scenes, various objects are often piled up. These objects have a certain degree of signal reflection and absorption. At the same time, the positions of various objects piled indoors may change, causing the Bluetooth beacon to move to the boundary of adjacent positioning areas. Because the signal sent by the Bluetooth positioning base station with a closer actual physical distance to the positioning area is weaker, while the signal sent by the Bluetooth positioning base station next door with a farther actual physical distance is stronger, it may be mistakenly determined that the Bluetooth positioning base station next door is within the coverage range of the positioning area where the positioning base station is located. Even in an open space, the signal strength of the Bluetooth positioning base station installed on the ceiling will slowly change with the passage of time and the differences between individual Bluetooth positioning base stations. Therefore, the accuracy of the Bluetooth positioning solution will drift over time. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an adaptive power adjustment method for an indoor Bluetooth positioning base station which can adaptively adjust the signal transmission strength of the Bluetooth positioning base station, has high positioning accuracy, is less affected by the environment and can ensure reliable positioning accuracy for a long time.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: an adaptive power adjustment method for an indoor Bluetooth positioning base station, comprising the following steps: Step 1: at least two Bluetooth positioning base stations are fixedly arranged at set intervals in the center of at least two adjacent positioning areas on the top of the room, and a Bluetooth signal adjustment base station is fixedly arranged on the ground at the center of the at least two Bluetooth positioning base stations, wherein the Bluetooth signal adjustment base station is provided with a signal strength detection module and a power adjustment signal sending module, and the Bluetooth positioning base station is provided with a positioning signal sending module and a power adjustment control module; Step 2: When the installation is completed, the signal strength detection module receives the initial positioning signal sent by the positioning signal sending module and stores the power of the initial positioning signal; Step 3: The signal strength detection module detects the real-time positioning signal sent by the positioning signal sending module in real time during operation, and then compares the power of the real-time positioning signal with the power of the initial positioning signal to obtain a detection difference; Step 4: The power adjustment signal sending module compares the absolute value of the detection difference with the preset maximum allowable error threshold. If the absolute value of the detection difference exceeds the maximum allowable error threshold, a power adjustment signal is generated and sent to the power adjustment control module of the Bluetooth positioning base station, and then step 5 is executed; if the absolute value of the detection difference is less than the maximum allowable error threshold, the detection result at this time is determined to be normal, and the signal strength detection module continues to perform real-time detection; Step 5: The power regulation control module adjusts the signal transmission power of the positioning signal sending module according to the received power regulation signal, and stops adjusting when the absolute value of the detection difference is less than the maximum allowable error threshold, thus completing the adaptive adjustment process.

[0005] Compared with the prior art, the advantage of the present invention is that a Bluetooth signal adjustment base station is fixedly set at the center of at least two Bluetooth positioning base stations on the ground, and the signal strength detection module in the Bluetooth signal adjustment base station performs real-time detection on the positioning signal strength sent by the Bluetooth positioning base station to obtain a real-time positioning signal. When the strength of the real-time positioning signal of each Bluetooth positioning base station changes due to changes in objects in the environment or the passage of time, it can be timely compared with the power of the initial positioning signal to obtain a detection difference. When the absolute value of the detection difference exceeds the maximum allowable error threshold, it means that the positioning result will be inaccurate. At this time, the power adjustment signal sending module generates a power adjustment signal and sends it to the power adjustment control module of the Bluetooth positioning base station, and the signal sending power of the positioning signal sending module of the Bluetooth positioning base station is correspondingly increased or decreased until the absolute value of the detection difference is less than the maximum allowable error threshold. The Bluetooth positioning system composed of the indoor Bluetooth positioning base station and the Bluetooth signal adjustment base station using this method has high positioning accuracy, is less affected by the environment, and can ensure reliable positioning accuracy for a long time.

[0006] Specifically, in step 1, the number of the Bluetooth positioning base stations is four, and the four Bluetooth positioning base stations are evenly distributed at the same set intervals and are respectively located at the center of four adjacent positioning areas on the top of the room, and the Bluetooth signal adjustment base station is fixedly set at the center ground of the four Bluetooth positioning base stations. Four or more Bluetooth positioning base stations are more generally suitable for positioning in larger indoor environments.

[0007] Specifically, in step 4, when the power of the real-time positioning signal is greater than the power of the initial positioning signal, the detection difference is a positive value, and the power adjustment signal generated by the power adjustment signal sending module is used to reduce the signal transmission power of the positioning signal sending module; when the power of the real-time positioning signal is less than the power of the initial positioning signal, the detection difference is a negative value, and the power adjustment signal generated by the power adjustment signal sending module is used to increase the signal transmission power of the positioning signal sending module. Regardless of whether the real-time positioning signal is weakened or strengthened, the signal transmission power of the positioning signal sending module of the Bluetooth positioning base station can be adjusted accordingly, thereby always ensuring positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the planar structure of the first embodiment; Figure 2 It is a structural block diagram of specific modules of Embodiment 1; Figure 3 This is a side view structural diagram of the first embodiment when there is no obstruction; Figure 4 This is a side view structural diagram of the first embodiment when there is shielding; Figure 5 It is a schematic diagram of the planar structure of the second embodiment.

[0009] Description of reference numerals: 1. Bluetooth positioning base station; 11. Positioning signal sending module; 12. Power regulation control module; 2. Bluetooth signal adjustment base station; 21. Signal strength detection module; 22. Power adjustment signal sending module. DETAILED DESCRIPTION

[0010] The present invention is further described in detail below with reference to the accompanying drawings.

[0011] Embodiment 1: Figures 1 to 4 As shown, an adaptive power adjustment method for an indoor Bluetooth positioning base station includes the following steps: Step 1: At least two Bluetooth positioning base stations 1 are fixedly set at the central positions of two adjacent positioning areas on the ceiling of the room at a set interval, and a Bluetooth signal adjustment base station 2 is fixedly set at the ground in the center of the at least two Bluetooth positioning base stations 1. The Bluetooth signal adjustment base station 2 is provided with a signal strength detection module 21 and a power adjustment signal sending module 22, and the Bluetooth positioning base station 1 is provided with a positioning signal sending module 11 and a power adjustment control module 12.

[0012] Step 2: When the installation is completed, the signal strength detection module 21 receives the initial positioning signal sent by the positioning signal sending module 11 and stores the power of the initial positioning signal.

[0013] Step 3: The signal strength detection module 21 detects the real-time positioning signal sent by the positioning signal sending module 11 in real time during operation, and then compares the power of the real-time positioning signal with the power of the initial positioning signal to obtain a detection difference.

[0014] Step 4: The power adjustment signal sending module 22 compares the absolute value of the detection difference with the preset maximum allowable error threshold. If the absolute value of the detection difference exceeds the maximum allowable error threshold, a power adjustment signal is generated and sent to the power adjustment control module 12 of the Bluetooth positioning base station 1, and then step 5 is executed; if the absolute value of the detection difference is less than the maximum allowable error threshold, the detection result at this time is determined to be normal, and the signal strength detection module 21 continues to perform real-time detection; Among them, when the power of the real-time positioning signal is greater than the power of the initial positioning signal, the detection difference is a positive value, and the power adjustment signal generated by the power adjustment signal sending module 22 is used to reduce the signal sending power of the positioning signal sending module 11; when the power of the real-time positioning signal is less than the power of the initial positioning signal, the detection difference is a negative value, and the power adjustment signal generated by the power adjustment signal sending module 22 is used to increase the signal sending power of the positioning signal sending module 11.

[0015] Step 5: The power regulation control module 12 adjusts the signal transmission power of the positioning signal sending module 11 according to the received power regulation signal, and stops adjusting when the absolute value of the detection difference is less than the maximum allowable error threshold, thereby completing the adaptive adjustment process.

[0016] The working principle of the above embodiment is as follows: The signal strength detection module 21 in the Bluetooth signal adjustment base station 2 performs real-time detection on the signal strength sent by the Bluetooth positioning base station 1. When the strength of the positioning signals of each Bluetooth positioning base station 1 changes due to changes in objects in the environment or the passage of time, the power of the real-time positioning signal is compared with the power of the initial positioning signal to obtain a detection difference. When the absolute value of the detection difference exceeds the maximum allowable error threshold, it indicates that the positioning result will be inaccurate. At this time, the power adjustment signal sending module 22 generates a power adjustment signal and sends it to the power adjustment control module 12 of the Bluetooth positioning base station 1, and adjusts the signal sending power of the positioning signal sending module 11 of the Bluetooth positioning base station 1 accordingly, until the absolute value of the detection difference is less than the maximum allowable error threshold, and then stops adjusting. After the adjustment, the strength of the positioning signals sent by the two Bluetooth positioning base stations 1 is basically the same, thereby ensuring an accurate positioning effect.

[0017] Embodiment 2: Figure 5 As shown, the rest is the same as the first embodiment, except that in step 1, there are four Bluetooth positioning base stations 1, which are evenly distributed at the same set interval and are respectively located at the center of four adjacent positioning areas on the top of the room, and the Bluetooth signal adjustment base station 2 is fixedly set at the center of the four Bluetooth positioning base stations 1. The four Bluetooth positioning base stations 1 are more generally suitable for positioning in larger indoor environments, and four Bluetooth positioning base stations 1 can be used as a group of Bluetooth positioning groups, and multiple Bluetooth positioning groups can be arranged according to the size of the room, so as to locate people or AGV vehicles in a larger indoor area and obtain effective and accurate movement trajectories.

Claims

1. An adaptive power adjustment method for an indoor Bluetooth positioning base station, characterized in that The following steps are involved: Step 1: at least two Bluetooth positioning base stations are fixedly arranged at set intervals in the center of at least two adjacent positioning areas on the top of the room, and a Bluetooth signal adjustment base station is fixedly arranged on the ground at the center of the at least two Bluetooth positioning base stations, wherein the Bluetooth signal adjustment base station is provided with a signal strength detection module and a power adjustment signal sending module, and the Bluetooth positioning base station is provided with a positioning signal sending module and a power adjustment control module; Step 2: When the installation is completed, the signal strength detection module receives the initial positioning signal sent by the positioning signal sending module and stores the power of the initial positioning signal; Step 3: The signal strength detection module detects the real-time positioning signal sent by the positioning signal sending module in real time during operation, and then compares the power of the real-time positioning signal with the power of the initial positioning signal to obtain a detection difference; Step 4: The power adjustment signal sending module compares the absolute value of the detection difference with the preset maximum allowable error threshold. If the absolute value of the detection difference exceeds the maximum allowable error threshold, a power adjustment signal is generated and sent to the power adjustment control module of the Bluetooth positioning base station, and then step 5 is executed; if the absolute value of the detection difference is less than the maximum allowable error threshold, the detection result at this time is determined to be normal, and the signal strength detection module continues to perform real-time detection; Step 5: The power regulation control module adjusts the signal transmission power of the positioning signal sending module according to the received power regulation signal, and stops adjusting when the absolute value of the detection difference is less than the maximum allowable error threshold, thus completing the adaptive adjustment process.

2. The adaptive power adjustment method of an indoor Bluetooth positioning base station according to claim 1 is characterized in that In step 1, the number of the Bluetooth positioning base stations is four, the four Bluetooth positioning base stations are evenly distributed at the same set intervals and are respectively located at the center positions of four adjacent positioning areas on the top of the room, and the Bluetooth signal adjustment base station is fixedly set at the center ground of the four Bluetooth positioning base stations.

3. The adaptive power adjustment method of an indoor Bluetooth positioning base station according to claim 2 is characterized in that In the step 4, when the power of the real-time positioning signal is greater than the power of the initial positioning signal, the detection difference is a positive value, and the power adjustment signal generated by the power adjustment signal sending module is used to reduce the signal sending power of the positioning signal sending module; when the power of the real-time positioning signal is less than the power of the initial positioning signal, the detection difference is a negative value, and the power adjustment signal generated by the power adjustment signal sending module is used to increase the signal sending power of the positioning signal sending module.

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