KR102700647B1 - 3D position tracking system using UWB - Google Patents

Abstract

The present invention discloses a position detection device using a UWB module. The position detection device using a UWB module according to the disclosed present invention may include a plurality of UWB anchor modules which are installed spaced apart from each other inside a building and periodically transmit and receive UWB (Ultra Wideband) signals, a plurality of UWB anchor modules which receive UWB signals from the plurality of UWB anchor modules, transmit position tracking information in response to the received UWB signals to the UWB anchor modules, a movable UWB identification tag which is equipped on a position detection target, and a management server which applies distances between the UWB anchor modules and the movable UWB identification tag, respectively calculated by the plurality of UWB anchor modules, to three-dimensional triangulation to detect the position of the movable UWB identification tag.

Description

{3D position tracking system using UWB}

The present invention relates to a position detection device using an UWB module, and more specifically, to a position detection device using a UWB module that can reduce position measurement errors of movable UWB identification tags by installing at least two movable UWB identification tags in the vertical direction indoors.

This invention is a study conducted with the support of the 2023 Global Enterprise-Linked Parts Domestic Production Support Project of Gyeonggi Technopark with funding from the government (Ministry of Trade, Industry and Energy) (Research Project Name: 2023 Global Enterprise-Linked Parts Domestic Production Support Project, Implementation Period: 2023.05.22 ~ 2024.02.28).

The conventional GPS-based positioning system measures the location of the user who receives the signal by using a radio signal transmitted from a satellite. However, since GPS cannot be used in indoor spaces, it is very difficult to use it as an indoor positioning system. Therefore, indoor spatial positioning systems that utilize networks such as Wi-Fi, Bluetooth, and RFID are replacing GPS technology.

For example, indoor positioning technologies include infrared-based position detection technology, ultrasonic-based positioning technology, Wi-Fi-based positioning technology, and UWB (ultra wide band)-based positioning technology. Infrared-based position detection technology can measure locations by installing infrared sensors on the ceiling of a building and having people carry infrared generators in the form of badges called active badges, and then detecting the corresponding signals with the infrared sensors. Ultrasonic-based positioning technology can measure locations by receiving ultrasonic waves generated by ultrasonic generators attached to people or objects by ultrasonic receivers attached to the ceiling of an office. Wi-Fi-based positioning technology can measure locations by using the strength of RF (radio frequency) signals received from wireless LAN access point (AP) devices or by using the transmission delay of RF signals. UWB-based positioning technology can measure locations by measuring the reception strength of received RF signals and measuring the signal transmission distance due to signal attenuation, or by using RFID (radio frequency identification)-based positioning technology that measures the location by measuring the reception strength of received RF signals, or by using wideband frequency bands.

Recently, the development of an ultra-precision location measurement system using UWB-based wireless tags is accelerating. The UWB system can measure many tags simultaneously, so it can accurately identify the location of people or objects indoors in almost real time, and is applied to confirming the movement of workers and managing inventory items in stores, offices, warehouses, and factories.

Here, UWB transmits signal energy by distributing it in a spectrum across a bandwidth of several GHz to avoid interference with other communication systems, so that it can communicate without interfering with other narrowband signals and without being greatly restricted by frequency. In addition, UWB is highly resistant to noise, has a high transmission rate, and has the advantages of low power consumption and small transmission output.

However, the conventional UWB system as described above has a problem in that the positional deviation of the mobile tag caused by the UWB module is large. Therefore, there is a need to improve this.

Meanwhile, domestic registered patent No. 10-2431800 (registration date: 2022.08.08) discloses a 'UWB antenna', public patent publication No. 10-2022-0072677 (publication date: 2022.06.02) discloses a 'UWB system', and public patent publication No. 10-2018-0095340 (publication date: 2018.08.27) discloses a 'device and method for measuring in-vehicle biometric information using UWB radar'.

The present invention was created in response to the above-mentioned need, and its purpose is to provide a position detection device using a UWB module capable of reducing position measurement errors of movable UWB identification tags by installing at least two movable UWB identification tags in the vertical direction indoors.

In addition, the present invention provides a position detection device using a UWB module that can selectively use an external antenna and an internal antenna of a UWB module depending on the installation location of a building in which the UWB module is installed, thereby improving convenience and performance, and also allowing easy adjustment of the installation direction of the UWB module. Another purpose of the present invention is to provide a position detection device using a UWB module.

In order to achieve the above purpose, a position detection device using a UWB module according to one aspect of the present invention is characterized by including a plurality of UWB anchor modules which are installed spaced apart from each other inside a building and periodically transmit and receive UWB (Ultra Wideband) signals, a plurality of UWB anchor modules which receive UWB signals from the plurality of UWB anchor modules, transmit position tracking information in response to the received UWB signals to the UWB anchor modules, a movable UWB identification tag which is equipped on a position detection target, and a management server which applies distances between the UWB anchor modules and the movable UWB identification tags respectively calculated by the plurality of UWB anchor modules to three-dimensional triangulation to detect the position of the movable UWB identification tag.

In addition, the present invention is characterized in that at least two UWB anchor modules are arranged vertically upward and downward inside a building.

In addition, the mobile UWB identification tag of the present invention is characterized by including a housing having an accommodation space and including a battery detachable support for supporting and separating a battery, a cover coupled to the housing to seal the housing, a battery connection terminal for connecting the battery, a PCB disposed inside the housing, and a shock-absorbing member coupled to the PCB and supported by the housing and the cover for buffering and absorbing shock transmitted to the PCB.

In addition, in the present invention, the shock-absorbing member is characterized by including a first shock-absorbing member having a coupling hole formed in the PCB, a first support protrusion inserted into the coupling hole, a first head portion formed by extending from the first support protrusion and contacting the upper surface of the PCB, and a coupling groove portion formed at the center of the first support protrusion, and a second shock-absorbing member having a second support protrusion coupled to the first support protrusion and a second head portion formed by extending from the second support protrusion and contacting the upper surface of the PCB.

In addition, in the present invention, the first head portion and the second head portion are characterized by being formed in a hemispherical shape.

In addition, the present invention is characterized in that a first support groove for supporting the first head portion is formed in one of the housing and the cover, and a second support groove for supporting the second head portion is formed in the other.

In addition, the UWB anchor module in the present invention is characterized by including an antenna unit having a plurality of built-in antennas and a plurality of external antennas for signal transmission and reception, a UWB chip for wirelessly communicating with the mobile UWB identification tag and a management server through the antenna unit, a control unit for controlling each device for measuring the distance between the antenna unit and the mobile UWB identification tag and estimating the location of the mobile UWB identification tag, an antenna switching unit for selectively connecting the built-in antenna or the external antenna to the UWB chip according to the control of the control unit, and an antenna mode setting unit for setting an antenna mode by a user so that either one of the built-in antenna and the external antenna can be selected or the antenna switching unit can be automatically set.

In addition, in the present invention, the UWB anchor module is characterized by including a UWB module for transmitting and receiving signals with the movable UWB identification tag, and an anchor module fixing unit that is coupled to a fixture so that the UWB module can be detached and fixed to the fixture.

In addition, in the present invention, the UWB module includes a first case and a second case coupled to the first case, and is characterized in that the second case is detachable from the anchor module fixing unit by a module detachment portion.

In addition, the anchor module fixing unit in the present invention is characterized by including an anchor fixing portion that is fixed to the fixture through a bolt or screw, a case fixing portion that is formed with a bolt fastening hole portion into which the detachable bolt is fastened and comes into contact with the second case, and a direction-adjusting fixing bracket portion that has one end coupled to the anchor fixing portion, the other end coupled to the case fixing portion, and an angle-adjusting catch portion for angle adjustment provided in the center portion.

In addition, in the present invention, the anchor fixing part is characterized by including an anchor fixing plate having a fastening hole formed therein for fixing the bolt or the screw and coupled to the fixing member, and a first bracket holding part formed so as to protrude from the center of the anchor fixing plate so that the direction-adjusting fixing bracket part can be rotatably inserted, and into which the direction-adjusting fixing bracket part is inserted and fixed.

In addition, in the present invention, the case fixing part is characterized by including a case fixing plate in which the bolt fastening hole part is formed and the second case is mounted so that the detachable groove part of the second case is aligned with the bolt fastening hole part, and a second bracket holding part that is formed to protrude from the center of the case fixing plate and into which the direction-adjusting fixing bracket part is inserted and fixed.

In addition, in the present invention, the direction-adjusting fixed bracket part is characterized by including a first boss part that is rotatably inserted into the first bracket holding part and fixed to the first bracket holding part through fastening with a screw, a first support bar that is formed by protruding from the first boss part and has a first fastening hole for fastening a bolt and a nut, a first engaging surface formed on one surface, and a first engaging protrusion part protruding from the first engaging surface, a second boss part that is rotatably inserted into the second bracket holding part and fixed to the second bracket holding part through fastening with a screw, and a second support bar that is formed by protruding from the second boss part so that a second engaging surface and a second engaging protrusion part are formed to contact and engage with the first engaging surface and the first engaging protrusion part, and a second fastening hole for fastening a bolt and a nut is formed.

As described above, the position detection device using the UWB module according to one aspect of the present invention has the effect of reducing the position measurement error of a mobile UWB identification tag by installing at least two or more UWB modules installed indoors in the vertical axis direction, unlike the prior art.

In addition, the position detection device using the UWB module according to the present invention can selectively use the external antenna and the internal antenna of the UWB module depending on the installation location of the building in which the UWB module is installed, and thus has the effect of improving convenience of use and performance.

FIG. 1 is a schematic diagram illustrating a position detection device using a U-WB module according to one embodiment of the present invention.
FIG. 2 is a block diagram illustrating a UWB anchor module according to one embodiment of the present invention.
FIG. 3 is a perspective view illustrating a UWB anchor module according to one embodiment of the present invention.
FIG. 4 is a side view illustrating a UWB anchor module according to an embodiment of the present invention.
FIG. 5 is an exploded perspective view illustrating an anchor module fixing unit according to one embodiment of the present invention.
FIG. 6 is a block diagram illustrating a mobile UWB identification tag according to an embodiment of the present invention.
FIG. 7 is an exploded perspective view illustrating a mobile UWB identification tag according to one embodiment of the present invention.
Figure 8 is an enlarged view of a main part for explaining a shock absorbing member according to one embodiment of the present invention.

Hereinafter, a preferred embodiment of a position detection device using a U-WB module according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines and the size of components illustrated in the drawings may be exaggerated for the sake of clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of their functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, the definitions of these terms should be made based on the contents throughout this specification.

In addition, the terminology used in this specification is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" and the like are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

FIG. 1 is a schematic diagram illustrating a wideband wireless communication device according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a UWB anchor module according to an embodiment of the present invention.

In addition, FIG. 3 is a perspective view for explaining a UWB anchor module according to an embodiment of the present invention, FIG. 4 is a side view for explaining a UWB anchor module according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view for explaining an anchor module fixing unit according to an embodiment of the present invention.

In addition, FIG. 6 is a block diagram for explaining a mobile UWB identification tag according to an embodiment of the present invention, FIG. 7 is an exploded perspective view for explaining a mobile UWB identification tag according to an embodiment of the present invention, and FIG. 8 is an enlarged view of a main part for explaining a shock absorbing member according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a position detection device using a U-WB module according to one embodiment of the present invention can be applied to detect the positions of workers, goods, work vehicles, etc. in an indoor area of a building, for example, a logistics warehouse.

In addition, the position detection device using the UWB module according to the present invention largely includes a UWB anchor module (100), a mobile UWB identification tag (200), and a management server (300). In the position detection device using the UWB module, the UWB anchor module (100) is connected to the management server (300) through a communication network, and the management server (300) can track and estimate the position of each mobile UWB identification tag (200) in real time.

For example, a position detection device using a UWB module according to the present embodiment can transmit and receive signals using a wideband wireless communication method between UWB anchor modules (100) and mobile UWB identification tags (200), can use a frequency of 6 GHz to 8.5 GHz, and can have a channel bandwidth of at least 500 MHz.

The UWB anchor module (100) according to the present embodiment may include a mobile UWB identification tag (200), a UWB module (110) for signal transmission and reception, and an anchor module fixing unit (130) from which the UWB module (110) can be detached and coupled to an indoor fixture so that the UWB module (110) can be fixed inside a building. A plurality of such UWB anchor modules (100) may be installed indoors, and in particular, at least two or more may be arranged vertically inside a building. This is to reduce positional errors of the mobile UWB identification tag (200).

In addition, the UWB module (110) is installed indoors and transmits specific information to the management server (300) only through wireless communication or internal communication so that management by the management server (300) is possible. At this time, the UWB module (110) can store UWB module management information, such as ID, installation location information, Bluetooth (BLE) advertising interval, Bluetooth transmission power (Tx power), etc.

Specifically, the UWB module (110) may include an antenna unit (111) for signal transmission and reception, a UWB chip (112) for wireless communication, a control unit (113) for controlling each device, an antenna switching unit (114) for switching the antenna unit (111) and connecting it to the UWB chip (112), and an antenna mode setting unit (115) for mode selection of the antenna switching unit (114).

In addition, the UWB module (110) may further include a memory unit (116) in which a ranging program according to the distance between the movable UWB identification tag (200) and the UWB module (110) is embedded by the control unit (113), a power block (117) that supplies power for the operation of the control unit (113) and the UWB chip (112), and a battery (118) in which the power for use is charged. In addition, the UWB module (110) may further include an interface unit (119) for convenience of use, for example, a Wi-Fi interface (119a), a Bluetooth interface (119b), and a USB interface (119c).

The antenna unit (111) may include a plurality of built-in antennas (111a) provided in the UWB module (110) and a plurality of external antennas (111b) provided to be exposed to the outside of the UWB module (110), and the built-in antenna (111a) or the external antenna (111b) may be selectively connected to the UWB chip (112) depending on the operation of the antenna switching unit (114) controlled by the control unit (113). At this time, the antenna switching unit (114) may be controlled according to a control signal input through the antenna mode setting unit (115).

The built-in antenna (111a) and the external antenna (111b) can be provided in a dual antenna manner, and either one can be selectively connected to the UWB chip (112) by the antenna switching unit (114).

The antenna switching unit (114) can be controlled by the control unit (113) according to a control signal input through the antenna mode setting unit (115).

The antenna mode setting unit (115) can perform one mode selected from the built-in antenna connection mode or the external antenna connection mode so as to physically control the use of the built-in antenna (111a) and the external antenna (111b) according to the user's selection. In addition, the antenna mode setting unit (115) can select the automatic connection mode. The automatic connection mode is to use an antenna with good signal transmission and reception according to the signal transmission and reception status of the built-in antenna (111a) and the external antenna (111b). That is, the antenna mode setting unit (115) can selectively generate each control signal according to the user's operation so as to select one of the built-in antenna (111a) and the external antenna (111b) or to automatically switch the switching of the antenna switching unit (114) according to the signal transmission and reception sensitivity of the built-in antenna (111a) and the external antenna (111b).

The control unit (113) controls the antenna switching unit (114) according to the operation of the antenna mode setting unit (115) to transmit and receive signals of the mobile UWB identification tag (200), and then measures the distance between the UWB module (110) and the mobile UWB identification tag (200), and calculates the location coordinates of the mobile UWB identification tag (200). Then, the location information of the mobile UWB identification tag (200) can be transmitted to the management server (300) and then stored in the memory unit (115). At this time, the management server (300) can detect the location of the indoor UWB module (110) and the location of the mobile UWB identification tag (200) in real time using the information transmitted from each UWB module (110).

The memory unit (116) can store data related to the operation and control of the broadband wireless communication device. Various storage media can be used as the memory unit (116). For example, one or more of storage media such as ROM, PROM, EPROM, EEPROM, RAM, etc. can be used as the memory unit (116).

Referring to FIGS. 3 to 5, a UWB module (110) according to an embodiment of the present invention includes a module case (120) that can be detachably attached to an anchor module fixing unit (130), and the module case (120) may be composed of a first case (121) and a second case (123). The module case (120) may be secured to the anchor module fixing unit (130) through a module detachment portion (125).

The UWB module (110) is connected to the first case (121) and the second case (123) through screws, and a power switch may be provided on one side. In addition, the first case (121) and the second case (123) may each be provided with a boss for fixing the PCB.

The module detachment part (125) may include a detachment groove part (125a) formed in the second case (123), and a detachment bolt (125b) coupled to the detachment groove part (125a) so as to secure the second case (123) to the anchor module fixing unit (130). At this time, a female screw for fastening the detachment bolt (125b) may be formed in the detachment groove part (125a), and a grip part may be further provided on the head of the detachment bolt (125b) for easy gripping by the user.

The anchor module fixing unit (130) according to the present embodiment can be coupled to a fixture so that the UWB module (110) can be detached and fixed to the fixture within a building. The anchor module fixing unit (130) can include an anchor fixing part (131), a case fixing part (133), and a direction-adjusting fixing bracket part (135).

The anchor fixing part (131) is connected to the fixture by means of a bolt or screw, and a direction-adjusting fixing bracket part (135) can be rotatably connected. This anchor fixing part (131) may include an anchor fixing plate (131a) that is connected to the fixture by means of a bolt or screw, and a first bracket holding part (131b) formed in the anchor fixing plate (131a) for mounting the direction-adjusting fixing bracket part (135). At this time, the anchor fixing part (131) may be formed integrally with the anchor fixing plate (131a) and the first bracket holding part (131b).

The anchor fixing plate (131a) may be formed in a circular shape so as to minimize restrictions on the fixing position, and may be formed with a plurality of fastening holes (131c) for fixing bolts or screws. The anchor fixing plate (131a) may have fastening holes (131c) formed radially with the first bracket holding portion (131b) as the center. The anchor fixing plate (131a) may be fixed by inserting a screw or the like into the fastening holes (131c) and being connected to a fixture.

The first bracket holding portion (131b) is formed to protrude from the center of the anchor fixing plate (131a) so that the direction-adjusting fixing bracket portion (135) can be rotatably inserted, and may be provided with a plurality of fastening screws so that the direction-adjusting fixing bracket portion (135) can be inserted and fixed. For example, when the direction-adjusting fixing bracket portion (135) is inserted into the first bracket holding portion (131b) and the fastening screws are engaged, the direction-adjusting fixing bracket portion (135) can be stably and firmly fixed to the first bracket holding portion (131b) as the fastening screws are in close contact with the direction-adjusting fixing bracket portion (135).

Additionally, the first bracket holding portion (131b) can be formed to protrude in a cylindrical shape from the anchor fixing plate (131a).

The case fixing part (133) can be fixedly mounted to the anchor fixing part (131) by the direction-adjusting fixing bracket part (135), and the UWB module (110) can be detached. The case fixing part (133) can include a case fixing plate (133b) in which a bolt fastening hole part (133a) for fastening a detachable bolt (125b) is formed, and a second bracket holding part (133c) provided on the case fixing plate (133b) so as to be mountable with the direction-adjusting fixing bracket part (135).

The case fixing plate (133b) is formed in a square shape and has two bolt fastening holes (133a) spaced apart from each other, and can be mounted so that the second case (123) comes into contact with it. For example, by fastening the detachment hole (125a) of the second case (123) to the case fixing plate (133b) while the second case (123) is in contact with the case fixing plate (133b) so that the detachment groove (125a) of the second case (123) is aligned with the bolt fastening hole (133a), the UWB module (110) can be fixed to the case fixing plate (133b).

The second bracket holding portion (133c) is formed to protrude cylindrically from the center of the case fixing plate (133b), into which the direction-adjusting fixing bracket portion (135) is inserted, and the direction-adjusting fixing bracket portion (135) can be fixed by engaging a fastening screw.

The direction-adjusting fixed bracket part (135) may be configured such that one end is mounted and fixed to the first bracket holding part (131b), and the other end is mounted and fixed to the second bracket holding part (133c) so that the position of the anchor fixing part (131) can be changed. This direction-adjusting fixed bracket part (135) may include a first boss part (136), a first support bar (137), a second boss part (138), a second support bar (139), and an angle-adjusting catch part (140). At this time, the angle-adjusting catch part (140) may be provided between the first support bar (137) and the second support bar (139).

The first boss portion (136) is rotatably inserted into the first bracket holding portion (131b) and can be tightly fixed to the first bracket holding portion (131b) by a screw fastened to the first bracket holding portion (131b). In addition, a first support bar (137) for forming an angle adjustment catch portion (140) can be extended from the first boss portion (136).

The first support bar (137) may be formed by protruding from the first boss portion (136) to form a first fastening hole (137a) for fastening a bolt and a nut. In addition, the first support bar (137) may have a first coupling surface (137b) formed on one surface for coupling with the second support bar (139), and an angle-adjusting catch (140) may be formed on the first coupling surface (137b).

The second boss portion (138) is rotatably inserted into the second bracket holding portion (133c), and can be fixed to the second bracket holding portion (133c) by fastening with a screw, and the second support bar (139) can be integrally formed to protrude. In addition, the second boss portion (138) can be formed in a cylindrical shape, and the second support bar (139) can be provided on one side.

The second support bar (139) is formed by protruding from the second boss portion (138), and a second fastening hole (137a) for fastening a bolt and nut is formed through it, and a second joining surface (139b) can be formed on one side. The second joining surface (139b) corresponds to the first joining surface (137b), and an angle-adjusting catch (140) can be formed.

The angle-adjusting catch (140) may be provided with a first catch projection (141) that is formed protrudingly on the first coupling surface (137b) and a second catch projection (143) that is formed protrudingly on the second coupling surface (139b). The angle-adjusting catch (140) may stably fix the first support bar (137) and the second support bar (139) by mutually engaging the first catch projection (141) and the second catch projection (143).

The first engaging projection (141) may be formed radially with the first fastening hole (137a) as the center, and the second engaging projection (143) may be formed radially with the second fastening hole (137a) as the center. Through the mutual engaging of the first engaging projection (141) and the second engaging projection (143), the movement and slipping of the first support bar (137) and the second support bar (139) that are mutually coupled can be prevented.

Referring to FIGS. 6 to 8, a mobile UWB identification tag (200) according to the present embodiment can receive UWB signals from a plurality of UWB modules (110) and transmit location tracking information in response to the received UWB signals to the UWB modules (110). Such a mobile UWB identification tag (200) can be equipped on a location detection target, etc.

In addition, the mobile UWB identification tag (200) may include a built-in antenna unit (201) for signal transmission and reception with the UWB module (110), an RF amplifier unit (202) for signal amplification, a UWB transceiver (203) for wireless communication, an MC U (204) for control, a memory unit (205) where information of the identification tag is stored, a power block (206) for supplying power, and a battery (207) for charging power.

In addition, the mobile UWB identification tag (200) may include a housing (210) having an accommodation space and including a battery detachable support portion (211) for supporting and separating a battery (207), a cover (220) coupled to the housing (210) to seal the housing (210), a battery connection terminal (231) for connecting the battery (207), a PCB (230) disposed inside the housing (210), and a shock-absorbing member (240) coupled to the PCB (230) and supported by the housing (210) and the cover (220) to buffer and absorb shock transmitted to the PCB (230).

The housing (210) may be equipped with an LED to indicate the charging status of the battery (117). A battery detachment support member (211) may be formed to protrude from the inside of the housing (210) to form a battery gripping groove for detaching the battery (117).

The shock-absorbing member (240) may include a joining hole (241), a first shock-absorbing member (243), a second shock-absorbing member (245), a first support groove (247), and a second support groove (249) to reduce external shock from being transmitted to the PCB (230). At this time, the joining hole (241) may be formed in the PCB (230), the first support groove (247) may be provided in the cover (220), and the second support groove (249) may be provided in the housing (210).

The coupling hole (241) can be formed at each corner of the PCB (230), and the first buffer member (243) and the second buffer member (245) can be coupled. At this time, the PCB (230) is supported by the housing (210) and the cover (220) by the first buffer member (243) and the second buffer member (245) coupled to the coupling hole (241), so that durability can be improved.

The first buffer member (243) may be provided with a first support protrusion (243a) inserted into the coupling hole (241), and a first head portion (243b) that is extended from the first support protrusion (243a) and comes into contact with one surface of the PCB (230). In addition, the first buffer member (243) may have a coupling groove portion (243c) formed at the center of the first support protrusion (243a) for coupling the second buffer member (245). In addition, the first head portion (243b) may be formed in a hemispherical shape so as to be stably supported by the first support groove portion (247), and may come into contact with the upper surface of the PCB (230).

The second buffer member (245) is supported by contacting the other surface of the PCB (230) so as to be coupled to the first buffer member (243), and may be supported by the second support groove (249). The second buffer member (245) may be provided with a second support protrusion (245a) coupled to the coupling groove (243c), and a second head portion (245b) that is formed by extending from the second support protrusion (245a) and contacting the other surface of the PCB (230). The second head portion (245b) may be formed by extending from the second support protrusion (245a) into a hemispherical shape and supported by the second support groove (249).

The first support groove (247) is formed on the inner surface of the cover (220) so that the first head portion (243b) can be secured and supported.

The second support groove (249) is formed on the inner surface of the housing (210) so that the second head portion (245b) can be secured and supported.

The position detection device using the UWB module according to the present invention as described above can install at least two or more UWB modules (110) installed indoors in the vertical axis direction, thereby reducing the position measurement error of the mobile UWB identification tag (200).

In addition, the position detection device using the UWB module according to the present invention can support the PCB (230) of the mobile UWB identification tag (200) to the housing (210) and the cover (220) using the shock absorbing member (240), thereby preventing damage to the PCB (230) due to external impact, etc. Through this, the durability of the mobile UWB identification tag (200), which is subject to a lot of external impact, can be improved.

In addition, the position detection device using the UWB module according to the present invention can selectively use an external antenna (111b) and an internal antenna (111a) for signal transmission and reception by using an antenna mode setting unit (115) depending on the installation environment of the building, thereby improving signal transmission and reception performance and improving convenience in use, and the installation direction of the UWB anchor module (100) can be easily adjusted as well as installed through the anchor module fixing unit (130).

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the following patent claims.

100: UWB anchor module 110: UWB module
111: Antenna section 111a: Built-in antenna
111b: External antenna 114: Antenna switching unit
112: UWB chip 115: Antenna mode setting section
113: Control section 116, 205: Memory section
117, 206 : Power Block 118, 207 : Battery
120: Module Case 121: First Case
123: Second case 125: Module removal part
125a: Detachable groove 125b: Detachable bolt
130: Anchor module fixing unit 131: Anchor fixing part
131a: Anchor fixing plate 131b: First bracket holding part
131c: Fastening hole 133: Case fixing part
133a: Bolt fastening hole 133b: Case fixing plate
133c: 2nd bracket holding part 135: Direction adjustment fixed bracket part
136: 1st Boss Department 137: 1st Support Department
137a: First connecting hole 137b: First connecting surface
138: 2nd Boss Department 139: 2nd Support Department
139a: Second connecting hole 139b: Second connecting surface
140: Angle adjustment catch 141: First catch projection
143: Second hook protrusion 200: Movable UWB identification tag
201: Built-in antenna section 202: RF amplifier section
203: UWB Transceiver 204: MCU
210: Housing 211: Battery detachment support
220 : Cover 230 : Pcb
231: Battery connection terminal 240: Shock absorbing member
241: Joint hole 243: First buffer member
245: Second buffer member 247: First support home part
249: 2nd support home

Claims (6)

A plurality of UWB anchor modules installed vertically and vertically at least two apart from each other inside a building and periodically transmitting and receiving UWB (Ultra Wideband) signals; a movable UWB identification tag provided on a location detection target, which receives UWB signals from the plurality of UWB anchor modules and transmits location tracking information in response to the received UWB signals to the UWB anchor modules; and a management server which detects the location of the movable UWB identification tag by applying the distance between the UWB anchor modules and the movable UWB identification tag, each calculated by the plurality of UWB anchor modules, to three-dimensional triangulation.
The above-mentioned mobile UWB identification tag comprises: a housing having a receiving space and including a battery detachable support for supporting and separating a battery; a cover coupled to the housing to seal the housing; a PCB having a battery connection terminal for connecting the battery and arranged inside the housing; and a shock-absorbing member coupled to the PCB and supported by the housing and the cover, and buffering and absorbing shock transmitted to the PCB.
The shock-absorbing member comprises: a first shock-absorbing member having a coupling hole formed in the PCB; a first support protrusion inserted into the coupling hole; a first head portion formed by extending from the first support protrusion and contacting the upper surface of the PCB, and a coupling groove formed at the center of the first support protrusion; and a second shock-absorbing member having a second support protrusion coupled to the first support protrusion and a second head portion formed by extending from the second support protrusion and contacting the upper surface of the PCB.
The first head portion and the second head portion are formed in a hemispherical shape, and a first support groove portion supporting the first head portion is provided on one of the housing and the cover, and a second support groove portion supporting the second head portion is formed on the other.
The above UWB anchor module comprises an antenna section having a plurality of built-in antennas and a plurality of external antennas for signal transmission and reception;
A UWB chip for wirelessly communicating with the mobile UWB identification tag and management server through the antenna unit;
A control unit for controlling each device that estimates the location of the mobile UWB identification tag by measuring the distance between the antenna unit and the mobile UWB identification tag;
An antenna switching unit that selectively connects the built-in antenna or the external antenna to the UWB chip under the control of the control unit; and
An antenna mode setting unit in which an antenna mode is set by a user so as to select either the built-in antenna or the external antenna or to automatically set the antenna switching unit;
A position detection device using a U-WB module characterized by including a . delete delete delete In the first paragraph,
The above UWB anchor module comprises a UWB module for transmitting and receiving signals with the mobile UWB identification tag; and
The UWB module is detachable, and includes an anchor module fixing unit coupled to the fixture so as to fix the UWB module to the fixture;
The above UWB module includes a first case and a second case coupled to the first case, and the second case is detached from the anchor module fixing unit by a module detachment portion.
The above anchor module fixing unit is an anchor fixing part that is connected to the fixture through a bolt or screw;
A case fixing portion in which a bolt fastening hole portion into which a detachable bolt is fastened is formed and which comes into contact with the second case; and
A direction-adjusting fixing bracket part having one end joined to the anchor fixing part, the other end joined to the case fixing part, and an angle-adjusting catch for angle adjustment provided in the center;
A position detection device using a U-WB module characterized by including a . In paragraph 5,
The above anchor fixing part is an anchor fixing plate that is formed with a fastening hole for fixing the bolt or the screw and is connected to the fixing body; and
It includes a first bracket holding portion that is formed by protruding from the center of the anchor fixing plate so that the direction-adjusting fixing bracket portion can be rotatably inserted, and into which the direction-adjusting fixing bracket portion is inserted and fixed;
The case fixing part is a case fixing plate in which the bolt fastening hole is formed and the second case is mounted so that the detachable groove of the second case is aligned with the bolt fastening hole; and
It includes a second bracket holding portion that is formed by protruding from the central portion of the case fixing plate and into which the direction-adjusting fixing bracket portion is inserted and fixed;
The above direction-adjusting fixed bracket part comprises a first boss part that is rotatably inserted into the first bracket holding part and is fixed to the first bracket holding part through screw fastening;
A first support bar having a first fastening hole formed by protruding from the first boss portion for fastening a bolt and a nut, a first joining surface formed on one surface, and a first engaging projection formed by protruding from the first joining surface;
A second boss portion that is rotatably inserted into the second bracket holding portion and is fixed to the second bracket holding portion through fastening with a screw; and
A second support bar is formed by protruding from the second boss portion so that a second engaging surface and a second engaging projection are formed to contact and engage with the first engaging surface and the first engaging projection, and a second fastening hole for fastening a bolt and a nut is formed;
A position detection device using a U-WB module characterized by including a .

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