CN211123050U - Antenna falling detection circuit - Google Patents
Antenna falling detection circuit Download PDFInfo
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- CN211123050U CN211123050U CN201921415965.1U CN201921415965U CN211123050U CN 211123050 U CN211123050 U CN 211123050U CN 201921415965 U CN201921415965 U CN 201921415965U CN 211123050 U CN211123050 U CN 211123050U
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- bluetooth
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- detection circuit
- bluetooth module
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Abstract
The utility model discloses an antenna drop detection circuit, which comprises a Bluetooth module, a Bluetooth receiving and transmitting antenna and a drop detection circuit, wherein the Bluetooth receiving and transmitting antenna is connected with the Bluetooth module and is used for receiving and transmitting Bluetooth wireless information input and output by the Bluetooth module; the falling detection circuit is respectively connected with the Bluetooth module and the Bluetooth receiving and transmitting antenna and is used for detecting whether the Bluetooth receiving and transmitting antenna falls off or not. Through detecting whether the bluetooth antenna drops, bluetooth module can send bluetooth antenna information to backend server through other communication methods with bluetooth antenna's connection status to make things convenient for the supplier to acquire bluetooth antenna's state or whether drop, after the supplier acquireed relevant information through backend server, can in time arrange that after-sales personnel are gone to the door and repair user's trouble product.
Description
Technical Field
The utility model relates to an intelligence lock technical field especially relates to an antenna detection circuitry that drops.
Background
The intelligence lock is different from traditional mechanical lock, and the main electronic equipment control motor of intelligence lock rotates the flexible door that comes the control lock core and locks or open, in the use, generally adopts the bluetooth customer end to come to communicate with the bluetooth module of intelligence lock to the rotation through bluetooth module control motor comes the locking or the opening operation of door, among the prior art, for simple to operate, generally with bluetooth antenna through the antenna mount pad install bluetooth module on. Can lead to the bluetooth antenna phenomenon of droing on installing the mount pad with bluetooth module through the mount pad on the mount pad in the use, the droing of bluetooth antenna can lead to bluetooth communication trouble, can't unblank through bluetooth wireless communication mode, and the user is under not knowing the stage property circumstances, can think that intelligent lock has been bad, brings very big inconvenience for the user.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide an antenna drop detection circuit.
In order to achieve the above object, according to the utility model discloses antenna detection circuitry that drops, antenna detection circuitry that drops includes:
a Bluetooth module;
the Bluetooth receiving and transmitting antenna is connected with the Bluetooth module and is used for receiving and transmitting Bluetooth wireless information input and output by the Bluetooth module;
and the falling detection circuit is respectively connected with the Bluetooth module and the Bluetooth receiving and transmitting antenna and is used for detecting whether the Bluetooth receiving and transmitting antenna falls off or not.
Further, according to the utility model discloses an embodiment, the drop detection circuit includes inductance L809 and resistance R810, the one end and the power supply of resistance R810 are connected, the other end and the one end of inductance L809 of resistance R810 are connected, the other end and the one end of bluetooth transceiver antenna of inductance L809 are connected, the other end and the ground connection of referencing of bluetooth transceiver antenna, the common port and the bluetooth module of inductance L809, resistance R810 are connected.
Further, according to the utility model discloses an embodiment, the detection circuitry that drops still includes: one end of the resistor R809 is connected with one end of the resistor R810, and the other end of the resistor R809 is connected with reference ground.
Further, according to the utility model discloses an embodiment, the detection circuitry that drops still includes: and a capacitor C826, wherein one end of the capacitor C826 is connected with one end of the resistor R810, and the other end of the capacitor C826 is connected with the reference ground.
Further, according to the utility model discloses an embodiment still includes: the Bluetooth receiving and transmitting antenna interface is used for detachably connecting the Bluetooth receiving and transmitting antenna with the Bluetooth module through the Bluetooth receiving and transmitting antenna interface.
Further, according to the utility model discloses an embodiment, the outside of bluetooth transceiver antenna interface is including the electrically conductive casing of ground connection, and bluetooth transceiver antenna passes through the electrically conductive casing of ground connection is connected with the ground of consulting.
The embodiment of the utility model provides an antenna detection circuitry that drops is through detecting bluetooth antenna and whether drops, when detecting bluetooth antenna and have to drop, bluetooth module can send bluetooth antenna information to backend server through the connection state of other communication modes with bluetooth antenna to make things convenient for the supplier to acquire bluetooth antenna's state or whether drop, after the supplier acquires relevant information through backend server, can in time arrange that after-sale personnel go to repair user's trouble product.
Drawings
Fig. 1 is a block diagram of an antenna fall-off detection circuit provided in an embodiment of the present invention;
fig. 2 is a block diagram of an antenna fall-off detection circuit provided in an embodiment of the present invention;
fig. 3 is a block diagram of another antenna falling-off detection circuit provided in the embodiment of the present invention;
fig. 4 is a structural diagram of the bluetooth transceiver antenna installation provided by the embodiment of the present invention.
Reference numerals:
a dropout detection circuit 10;
a Bluetooth module 20;
a door lock Bluetooth chip 201;
a bluetooth filter circuit 202;
a bluetooth transceiver antenna interface 30;
a ground conductor case 301;
a Bluetooth Transmit-receive Signal line 302;
a Bluetooth transceiver antenna 40;
an antenna ground housing 401;
an antenna ground line 402.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, an embodiment of the present invention provides an antenna drop detection circuit 10, including: the system comprises a Bluetooth module 20, a Bluetooth transceiving antenna 40 and a drop detection circuit 10, wherein the Bluetooth transceiving antenna 40 is connected with the Bluetooth module 20, and the Bluetooth transceiving antenna 40 is used for transceiving Bluetooth wireless signals input and output by the Bluetooth module 20; the falling detection circuit 10 is respectively connected with the bluetooth module 20 and the bluetooth transceiving antenna 40, and the falling detection circuit 10 is used for detecting whether the bluetooth transceiving antenna 40 falls off. Specifically, in the smart door lock, communication with a client of a user is generally performed through a bluetooth module. On one hand, the Bluetooth module is used for receiving a set-up command of a user and controlling the motor to rotate to unlock. And on the other hand, the unlocking state of the intelligent door lock is fed back to the user client. And the communication quality and the communication stability of the bluetooth module are largely determined by the bluetooth antenna. For the stability of bluetooth signal, generally adopt the independent bluetooth antenna of detachable as bluetooth module's receiving and dispatching antenna, because detachable independent bluetooth antenna does not integrate on same circuit board together with bluetooth module. The bluetooth antenna may fall off due to vibration or the like after being used for a long time. If the Bluetooth antenna falls off, the communication quality of the Bluetooth module is seriously influenced.
As shown in fig. 1, in the embodiment of the present invention, the bluetooth transceiving antenna 40 is detachably connected to the bluetooth module 20 through an antenna interface. In the using process, the bluetooth transceiving antenna 40 may be separated from the antenna interface, that is, the bluetooth transceiving antenna 40 and the bluetooth antenna interface 30 are separated, because the bluetooth antenna interface 30 is directly connected to the rf signal output terminal of the bluetooth module 20, the bluetooth wireless signal is transmitted to the bluetooth transceiving antenna through the bluetooth antenna interface 30, when the bluetooth transceiving antenna 40 is separated, the bluetooth wireless signal is not transmitted to the bluetooth transceiving antenna 40 by the bluetooth antenna interface, the bluetooth wireless signal received by the bluetooth transceiving antenna 40 cannot be transmitted to the bluetooth module 20, thereby causing the communication failure of the bluetooth module 20. At this moment, the user just can't carry out the control of intelligent lock through the bluetooth. Under the condition that the user does not know, the user can think that the door lock is in failure and the use of the user is influenced. As shown in fig. 1, the falling detection circuit 10 is disposed between the bluetooth module 20 and the bluetooth antenna interface 30, and detects the level signal at the end of the bluetooth antenna interface 30 through the antenna detection circuit 10, and obtains the installation state of the bluetooth transceiving antenna 40 through the level signal at the end of the bluetooth antenna interface 30, since the installation state of the bluetooth transceiving antenna 40 can reflect whether the bluetooth transceiving antenna 40 falls off. The status of the bluetooth transceiving antenna 40 through the bluetooth antenna interface 30 can be detected in real time, and the detected result can be transmitted to the bluetooth module 20, so that the status of the bluetooth transceiving antenna 40 can be obtained through the bluetooth module 20 in real time. When detecting that the bluetooth antenna drops, bluetooth module 20 can send the connection status of bluetooth antenna to the backend server through other communication modes with bluetooth antenna information to make things convenient for the supplier to acquire the state of bluetooth antenna or whether drop, after the supplier acquires relevant information through the backend server, can in time arrange that after-sales personnel are on the door and repair the trouble product of user.
The embodiment of the utility model provides an antenna detection circuitry 10 that drops is connected with bluetooth module 20 and through bluetooth antenna interface 30 and bluetooth transceiver antenna 40 respectively, detects the level signal of bluetooth antenna interface 30 end through antenna detection circuitry 10 to level signal through bluetooth antenna interface 30 end acquires bluetooth transceiver antenna 40's mounted state, because bluetooth transceiver antenna 40's mounted state can reflect bluetooth transceiver antenna 40 and whether have and drop. Whether there is the drop through detecting the bluetooth antenna, when detecting the bluetooth antenna and having the drop, can be with bluetooth antenna information transmission to the user to make things convenient for the user to acquire bluetooth antenna information that drops, and can take other modes to unblank. For example, adopt fingerprint identification mode to unblank, in addition, the user also can install the bluetooth mount pad again with bluetooth antenna according to indicating information for bluetooth is wireless unblanked and can normally work again, thereby increases user's use experience.
Referring to fig. 2, further, in an embodiment of the present invention, the falling detection circuit 10 includes an inductor L809 and a resistor R810, one end of the resistor R810 is connected to the power supply VDD2V8, the other end of the resistor R810 is connected to one end of the inductor L809, the other end of the inductor L809 is connected to one end of the bluetooth transceiver antenna 40, the other end of the bluetooth transceiver antenna 40 is connected to the reference ground, and the common end of the inductor L809 and the resistor R810 is connected to the bluetooth module 20.
As shown in FIG. 2, an inductor L809 and a resistor R810 form a level detection circuit, one end of an inductor L809 is connected to a power supply VDD2V8 through a resistor R810, the power supply VDD2V8 serves as a reference power supply, and the other end of the inductor L0809 is connected to a wireless signal output terminal of the Bluetooth transceiver antenna 40 and the Bluetooth module through an antenna interface 30. since one end of an inductor L809 is connected to the power supply VDD2V8 through a resistor R810 and the other end of the inductor L809 is connected to a reference ground through the Bluetooth transceiver antenna 40, the connection state of the Bluetooth transceiver antenna 40 can be directly reflected by the level state of the inductor L809. that the inductor L809 is connected to the reference ground when the Bluetooth antenna is not detached, the inductor L is connected to the reference ground through the Bluetooth transceiver antenna 40. at this time, the level of the inductor L and the common terminal of the resistor R810 is pulled low, and the level is transmitted to the Bluetooth module 20 through the P030_ MBTANT _ DET terminal, the common terminal detects that the Bluetooth antenna is detached from the Bluetooth transceiver antenna, and the Bluetooth antenna is a high level when the Bluetooth antenna, the Bluetooth antenna is detected by the Bluetooth antenna 810 and the Bluetooth transceiver antenna 120 is detected as a high antenna, the reference signal level of the Bluetooth antenna, the Bluetooth antenna 120 is detected as a high antenna 809 _ MBNT terminal DET _ 20, the Bluetooth antenna 120 _ 20.
It should be noted that the other end of the inductor L809 is connected to the rf output end of the bluetooth module 20, and the inductor L809 plays a role of isolating the bluetooth 2.4GHZ rf signal output by the bluetooth module 20, so as to avoid interference of the bluetooth 2.4GHZ rf signal with the signal at the P030_ MBTANT _ DET detection end, after the isolation of the inductor L809, the 2.4GHZ rf signal output by the bluetooth module 20 does not affect normal detection of the antenna detection circuit 10 on the bluetooth transceiving antenna 40, the embodiment of the present invention connects the inductor L809 and the resistor R810 to the bluetooth transceiving antenna 40 and the bluetooth module 20, so as to detect the bluetooth transceiving antenna 40, and can obtain the installation state of the bluetooth transceiving antenna 40 through the level value at one end of the inductor L809, thereby detecting whether the bluetooth transceiving antenna 40 is detached, and transmitting the bluetooth antenna detachment level signal to the bluetooth module 20, so as to detect whether the bluetooth transceiving antenna 40 is detached in real time through the bluetooth transceiving antenna 20, and the bluetooth transceiving antenna detection circuit is simple in use, and has low production cost.
Referring to fig. 2, further, in an embodiment of the present invention, the drop detection circuit 10 further includes: one end of the resistor R809 is connected with one end of the resistor R810, and the other end of the resistor R809 is connected with the reference ground. Specifically, a voltage dividing circuit is formed by the resistor R809 and the resistor R810, and the divided voltage of the power supply VDD2V8 is output to the bluetooth module 20, because the voltage value of the power supply VDD2V8 may not satisfy the voltage detection range of the bluetooth module 20, and a voltage dividing circuit is formed by the resistor R809 and the resistor R810, and the divided voltage of the power supply VDD2V8 is transmitted to the bluetooth module 20, so as to satisfy the voltage detection range of the bluetooth transceiver antenna of the bluetooth module 20, and thus the voltage value output by the antenna detection circuit 10 of the bluetooth module 20 can be normally detected. Of course, when the power supply VDD2V8 satisfies the voltage detection range of the bluetooth module 20, the resistor R809 is required to divide the voltage. The output voltage of the power supply VDD2V8 is directly transmitted to the bluetooth module 20 for detection. The resistance values of the resistor R810 and the resistor R809 can be set according to the voltage value of the power supply VDD2V8 and the voltage detection range of the bluetooth module 20, so as to adapt to bluetooth modules of different models.
Referring to fig. 2, further, in an embodiment of the present invention, the drop detection circuit 10 further includes: one end of the capacitor C826 is connected to one end of the resistor R810, and the other end of the capacitor C826 is connected to the ground reference. Through incorporating electric capacity C826 into bluetooth module 20 signal antenna collection end that drops, the filtration interfering signal guarantees bluetooth module 20 sampling voltage's stability, avoids the false detection that bluetooth transceiver antenna drops. Since the capacitor C826 has a filtering function, a possibly generated interference signal at the P030_ mbtan _ DET detection terminal of the bluetooth module 20 can be filtered out. The level of the P030_ mbtan _ DET detection end of the bluetooth module 20 is ensured to be in a relatively stable state, and since an external signal or an interference signal inside the smart door lock can be superimposed on the P030_ mbtan _ DET detection end of the bluetooth module 20, such a signal is generally a transient surge signal. If such signals are not filtered, it is likely that the signal at the detection end of the P030_ MBTANT _ DET of the bluetooth module 20 is suddenly pulled down or raised, and after the signal is transmitted to the bluetooth module 20, the misjudgment of the bluetooth module 20 is caused, so that the frequency of the intelligent door lock reporting fault is increased, and the user experience is affected. Transient surge signals can be filtered out completely through the capacitor C826, and the detection end of the Bluetooth module 20P 030_ MBTANT _ DET is guaranteed not to be interfered by the transient surge signals. Therefore, the failure reporting frequency of the intelligent door lock is reduced, and the user experience is improved.
Referring to fig. 3, further, in an embodiment of the present invention, the antenna dropout detection circuit 10 further includes a bluetooth transceiver antenna interface 30, the bluetooth transceiver antenna 40 is detachably connected to the bluetooth module 20 through the bluetooth transceiver antenna interface 30, as shown in fig. 3, since the bluetooth antenna according to an embodiment of the present invention is an external antenna, the antenna is not integrated with the bluetooth module 20 on the same circuit board, and the bluetooth transceiver antenna interface 30 is installed and fixed on the same circuit board as the bluetooth module 20, and is detachably connected to the bluetooth transceiver antenna 40 through the bluetooth transceiver antenna interface 30, in an embodiment of the present invention, the bluetooth transceiver antenna interface 30 may be an SMA interface through which the bluetooth transceiver antenna 40 is conveniently connected to the bluetooth module 20, as shown in fig. 2 and 3, the bluetooth transceiver antenna interface 30 is an SMA interface JB01, and may be conveniently connected to the bluetooth transceiver antenna 40 through an SMA interface JB01, as shown in fig. 2, one end of the bluetooth transceiver antenna 40 is connected to the radio frequency signal output terminal of the bluetooth module 20 through an SMA interface 01 and the antenna detection circuit, and the antenna detection circuit detects when the bluetooth transceiver antenna dropout of the bluetooth transceiver antenna is in a bluetooth transceiver antenna reference level, otherwise, the bluetooth transceiver antenna is connected to the bluetooth transceiver antenna through a bluetooth transceiver antenna reference ground, the bluetooth transceiver antenna terminal is connected to detect that the bluetooth transceiver antenna is connected to the bluetooth transceiver antenna terminal of the bluetooth transceiver antenna 40, and the bluetooth transceiver antenna is connected to detect that the bluetooth transceiver antenna terminal is in a bluetooth transceiver antenna terminal is not connected to detect that the bluetooth transceiver antenna terminal is in a bluetooth transceiver 40, and the bluetooth transceiver antenna terminal is in a bluetooth transceiver antenna terminal, and the bluetooth transceiver antenna terminal is connected to detect a bluetooth transceiver terminal, otherwise, when the bluetooth transceiver antenna terminal is connected to detect that the bluetooth transceiver antenna terminal is in a bluetooth transceiver antenna terminal in a bluetooth transceiver terminal, and the bluetooth transceiver terminal in a bluetooth transceiver terminal, when the bluetooth transceiver terminal in a bluetooth transceiver terminal.
The embodiment of the utility model provides a through bluetooth transceiver antenna interface 30, can be connected to bluetooth module 20 with bluetooth transceiver antenna 40 conveniently to be connected to the reference ground through bluetooth transceiver antenna interface 30 with bluetooth transceiver antenna 40's the other end, in order to make things convenient for bluetooth module 20 to inspect bluetooth transceiver antenna's installation status. The circuit structure is simple and small, and the realization cost is low.
Referring to fig. 4, further, in an embodiment of the present invention, the outside of the bluetooth transceiver antenna interface 30 includes a grounded conductive housing 301, and the bluetooth transceiver antenna 40 is connected to the ground reference through the grounded conductive housing. As shown in fig. 4, the other end of the bluetooth transceiver antenna 40 may be directly led out through the antenna ground line 402 and led out to the antenna ground housing 401, the antenna ground housing 401 is fitted to the upper portion of the ground conductive housing 301, when the bluetooth transceiver antenna 40 is connected to the bluetooth transceiver antenna interface 30, the ground conductive housing 301 is connected to the ground conductive housing 301 on the outer side of the bluetooth transceiver antenna interface 30, and the ground conductive housing 301 is connected to the reference ground, so that the other end of the bluetooth transceiver antenna 40 is guided to the reference ground. It should be noted that the antenna ground housing 401 may be connected to the ground conductive housing 301 of the bluetooth transceiver antenna interface 30 by a screw connection. After the bluetooth transceiving antenna 40 is installed in the bluetooth transceiving antenna interface 30, the signal output terminal (the other end of the bluetooth transceiving antenna) of the bluetooth transceiving antenna, which is far away from the bluetooth module 20, can be directly connected to the ground conductive housing 301, so that the signal output terminal (the other end of the bluetooth transceiving antenna) of the bluetooth transceiving antenna 40, which is far away from the bluetooth module 20, is connected to the reference ground. In the embodiment of the present invention, the signal output terminal of the bluetooth transceiving antenna 40 away from the bluetooth module 20 can be connected to the reference ground more conveniently through the grounded conductive housing 301. The bluetooth transceiving antenna interface 30 has a simple structure and can be used together with a corresponding structure of the bluetooth transceiving antenna 40. The installation of the bluetooth transceiver antenna 40 and the connection of the bluetooth transceiver antenna 40 to the reference ground are facilitated. Meanwhile, the installation state of the bluetooth transceiving antenna 40 can be better detected by matching with an antenna detection circuit.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (6)
1. An antenna dropout detection circuit, comprising:
a Bluetooth module;
the Bluetooth receiving and transmitting antenna is connected with the Bluetooth module and is used for receiving and transmitting Bluetooth wireless information input and output by the Bluetooth module;
and the falling detection circuit is respectively connected with the Bluetooth module and the Bluetooth receiving and transmitting antenna and is used for detecting whether the Bluetooth receiving and transmitting antenna falls off or not.
2. The antenna drop detection circuit according to claim 1, wherein the drop detection circuit comprises an inductor (L809) and a first resistor (R810), one end of the first resistor (R810) is connected with a power supply, the other end of the first resistor (R810) is connected with one end of an inductor (L809), the other end of the inductor (L809) is connected with one end of a Bluetooth transceiving antenna, the other end of the Bluetooth transceiving antenna is connected with a reference ground, and a common end of the inductor (L809) and the first resistor (R810) is connected with the Bluetooth module.
3. The antenna dropout detection circuit of claim 2, further comprising: and one end of the second resistor (R809) is connected with one end of the first resistor (R810), and the other end of the second resistor (R809) is connected with a reference ground.
4. The antenna dropout detection circuit of claim 2 or 3, further comprising: a capacitor (C826), one end of the capacitor (C826) being connected to one end of the first resistor (R810), the other end of the capacitor (C826) being connected to a ground reference.
5. The antenna dropout detection circuit of claim 1, further comprising: the Bluetooth receiving and transmitting antenna interface is used for detachably connecting the Bluetooth receiving and transmitting antenna with the Bluetooth module through the Bluetooth receiving and transmitting antenna interface.
6. The circuit of claim 5, wherein the bluetooth transceiver antenna interface includes a grounded conductive housing on an outer side thereof, and the bluetooth transceiver antenna is connected to a reference ground through the grounded conductive housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921415965.1U CN211123050U (en) | 2019-08-28 | 2019-08-28 | Antenna falling detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921415965.1U CN211123050U (en) | 2019-08-28 | 2019-08-28 | Antenna falling detection circuit |
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| CN211123050U true CN211123050U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488102A (en) * | 2019-08-28 | 2019-11-22 | 深圳市朗仁科技有限公司 | Antenna falls off detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488102A (en) * | 2019-08-28 | 2019-11-22 | 深圳市朗仁科技有限公司 | Antenna falls off detection circuit |
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Effective date of registration: 20210602 Address after: 518000 1701-1708, 1801-1806, block D, building 1, Chuangzhi Yuncheng bid section 1, Liuxian Avenue, Xili community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Yunjia Intelligent Technology Co.,Ltd. Address before: 518000 Yue Meilin Central Plaza, Kang Road, Futian District, Shenzhen City, Guangdong Province (North District), 2nd floor 204, 205, 206 Patentee before: SHENZHEN XTOOLTECH Co.,Ltd. |
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