CN211669346U - Connection detection system - Google Patents
Connection detection system Download PDFInfo
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- CN211669346U CN211669346U CN201922375244.9U CN201922375244U CN211669346U CN 211669346 U CN211669346 U CN 211669346U CN 201922375244 U CN201922375244 U CN 201922375244U CN 211669346 U CN211669346 U CN 211669346U
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Abstract
The utility model discloses a connect detecting system, include: the first electronic equipment comprises a first control chip, a first positive contact and a first negative contact which are connected with the first control chip, and a second resistor is connected between the first negative contact and the ground; the second electronic device comprises a second control chip, and a second positive contact and a second negative contact which are connected with the second control chip, wherein the second negative contact is grounded; the first positive electrode contact and the second positive electrode contact are correspondingly connected or disconnected, the first negative electrode contact and the second negative electrode contact are correspondingly connected or disconnected, and the first control chip detects the level state of the first negative electrode contact to judge whether the first electronic device is connected with the second electronic device. The utility model discloses a first electronic equipment pass through the circuit form detect with second electronic equipment's connection, check-out time is short, and the low power dissipation.
Description
Technical Field
The utility model relates to the field of electronic technology, in particular to connect detecting system.
Background
Among the prior art, the in-process that the box that charges is put into to wireless earphone, and the box that charges need detect wireless earphone and whether put into, and the realization scheme generally puts into hall sensor in the box that charges, puts into magnet simultaneously in wireless earphone, through hall sensor detects whether magnet is close to, detects wireless earphone and whether put into the box that charges, and this kind of mode cost is higher, and all needs software to assist, leads to the increase of electronic equipment consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a connect detecting system aims at solving the electronic equipment connection process among the prior art, and detection circuitry is with high costs and the problem of electronic equipment consumption increase.
In order to achieve the above object, the utility model provides a connect detecting system, connect detecting system includes: the first electronic device comprises a first control chip, a first positive contact and a first negative contact which are connected with the first control chip, and a second resistor is connected between the first negative contact and the ground; the second electronic device comprises a second control chip, and a second positive contact and a second negative contact which are connected with the second control chip, wherein the second negative contact is grounded; the first positive electrode contact and the second positive electrode contact are correspondingly connected or disconnected, the first negative electrode contact and the second negative electrode contact are correspondingly connected or disconnected, and the first control chip detects the level state of the first negative electrode contact to judge whether the first electronic device is connected with the second electronic device.
Further, the first electronic device further comprises a first communication contact connected with the first control chip, and a first resistor is connected between the first communication contact and the first negative contact; the second electronic equipment further comprises a second communication contact connected with the second control chip, and a third resistor is connected between the second communication contact and the power supply; the first communication contact and the second communication contact are correspondingly connected or disconnected, and the second control chip detects the level state of the second communication contact so as to detect whether the second electronic equipment is connected with the first electronic equipment.
Furthermore, the first positive contact and the second positive contact are correspondingly conducted, when the first negative contact and the second negative contact are correspondingly conducted, a first voltage division loop is formed among the first positive contact, the second control chip, the second negative contact, the first negative contact, the second resistor and the ground, and the first control chip detects that the first negative contact is in a high level state so as to judge that the first electronic equipment is connected with the second electronic equipment.
Further, the first communication contact is correspondingly conducted with the second communication contact, when the first negative contact is correspondingly conducted with the second negative contact, a second voltage division loop is formed among the power supply, the second communication contact, the first resistor, the first negative contact, the second negative contact and the ground, and the second control chip detects that the second communication contact is in a high level state so as to judge that the second electronic device is connected with the first electronic device.
Further, the first electronic device further includes: the charging control circuit is connected to the first control chip and the first negative contact, and the charging control circuit is used for pulling down the level of the first negative contact under the control of the first control chip.
Further, the charge control circuit includes a field effect transistor; the grid electrode of the field effect transistor is connected to the first control chip; a gate source of the field effect transistor is connected to the first negative contact; the drain of the field effect transistor is connected to ground.
Furthermore, a first connecting point is arranged between the first control chip and the first negative contact; the charging control circuit comprises a sampling resistor, one end of the sampling resistor is connected to the first connecting point, and the other end of the sampling resistor is connected to the grid electrode of the field effect transistor.
Furthermore, a second connection point is arranged between the first control chip and the first connection point; the charging control circuit comprises a filter capacitor, one end of the filter capacitor is connected to the second connection point, and the other end of the filter capacitor is grounded.
Furthermore, the connection detection system includes a third electronic device, the third electronic device includes a third control chip, and a third positive contact, a third communication contact, and a third negative contact connected to the third control chip, a fourth resistor is connected between the third communication contact and the power supply, and the third negative contact is grounded; the first positive contact and the third positive contact are correspondingly connected or disconnected, the first communication contact and the third communication contact are correspondingly connected or disconnected, the first negative contact and the third negative contact are correspondingly connected or disconnected, the first control chip detects the level state of the first negative contact to judge whether the first electronic device is connected with the third electronic device, and/or the third control chip detects the level state of the third communication contact to detect whether the third electronic device is connected with the first electronic device, the first electronic device is a charging box, and the second electronic device and the third electronic device are wireless earphones.
Furthermore, the first electronic device further comprises a fourth communication contact and a fourth negative contact which are connected with the first control chip, a fifth resistor is connected between the fourth communication contact and the fourth negative contact, and a sixth resistor is connected between the fourth negative contact and the ground; the connection detection system comprises a third electronic device, the third electronic device comprises a third control chip, and a third positive contact, a third communication contact and a third negative contact which are connected with the third control chip, a fourth resistor is connected between the third communication contact and a power supply, and the third negative contact is grounded; the first positive contact and the third positive contact are correspondingly connected or disconnected, the third communication contact and the fourth communication contact are correspondingly connected or disconnected, the third negative contact and the fourth negative contact are correspondingly connected or disconnected, the first control chip detects the level state of the fourth negative contact to judge whether the first electronic device is connected with the third electronic device, and/or the third control chip detects the level state of the third communication contact to detect whether the third electronic device is connected with the first electronic device, the first electronic device is a charging box, and the second electronic device is a wireless earphone.
The utility model discloses in when first electronic equipment is connected with second electronic equipment, first positive contact corresponds to switch on with second positive contact, first negative pole contact with second negative pole contact corresponds switches on, first control chip detects the level state of first negative pole contact is in order to judge whether first electronic equipment with second electronic equipment connects, first electronic equipment pass through the circuit form detect with second electronic equipment's connection, check-out time is short, and need not realize with the help of software, the low power dissipation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a connection detection system 1 according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a connection detection system according to embodiment 2 of the present invention;
fig. 3 is a schematic circuit diagram of the connection detection system according to embodiment 3 of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, in an embodiment 1, a connection detecting system 100 according to the present invention includes: a first electronic device 10, wherein the first electronic device 10 includes a first control chip 11, and a first positive contact T11, a first communication contact T12, and a first negative contact T13 connected to the first control chip 11, a first resistor R1 is connected between the first communication contact T12 and the first negative contact T13, and a second resistor R2 is connected between the first negative contact T13 and ground; a second electronic device 20, where the second electronic device 20 includes a second control chip 21, and a second positive contact T21, a second communication contact T22, and a second negative contact T23 connected to the second control chip 21, a third resistor R3 is connected between the second communication contact T22 and a power source VCC, and the second negative contact T23 is grounded; the first positive contact T11 is turned on or off corresponding to the second positive contact T21, the first communication contact T12 is turned on or off corresponding to the second communication contact T22, the first negative contact T13 is turned on or off corresponding to the second negative contact T23, the first control chip 11 detects a level state of the first negative contact T13 to determine whether the first electronic device 10 is connected to the second electronic device 20, and/or the second control chip 21 detects a level state of the second communication contact T22 to determine whether the second electronic device 20 is connected to the first electronic device 10.
In this embodiment, the first electronic device 10 may be a charging box (not shown) of a wireless headset (not shown), or may be other types of electronic devices, the second electronic device 20 may be a wireless headset (e.g., a TWS headset, a true wireless bluetooth fidelity headset), or may be other types of electronic devices, and the following description will take the first electronic device 10 as a charging box of a wireless headset, and the second electronic device 20 as a wireless headset.
In this embodiment, the connection process between the first electronic device 10 and the second electronic device 20 may be a process in which the wireless headset is placed in the charging box and connected, when the second electronic device 20 is not placed in the first electronic device 10, the first positive contact T11 is disconnected from the second positive contact T21, the first communication contact T12 is disconnected from the second communication contact T22, and the first negative contact T13 is disconnected from the second negative contact T23, at this time, the first negative contact T13 is grounded via the second resistor R2, and the first negative contact T13 is at a low level; after the second electronic device 20 is placed in the first electronic device 10, the first positive contact T11 and the second positive contact T21 are correspondingly turned on, the first communication contact T12 and the second communication contact T22 are correspondingly turned on, the first negative contact T13 and the second negative contact T23 are correspondingly turned on, at this time, a first voltage division loop (not shown) is formed between the first positive contact T11, the second positive contact T21, the second control chip 21, the second negative contact T23, the first negative contact T13, the second resistor R2 and the ground, the first control chip 11 controls the first positive contact T11 to output a high level, such as 5V, the high level is divided by the second control chip 21 and the second resistor R2, the voltage at the first negative contact T13 is the voltage at two ends of the second resistor R2, and the state of the first negative contact T13 is the high level at this time, that is, the level state of the first negative contact T13 changes from low level when the first electronic device 10 and the second electronic device 20 are not connected to each other to high level, and when the first control chip 11 detects that the first negative contact T13 is in high level state, it is determined that the first electronic device 10 and the second electronic device 20 are connected, that is, it is determined that the wireless headset is placed in the charging box. Specifically, the voltage drop generated on the second control chip 21 is caused by a circuit inside the second control chip 21, an integrated circuit (not shown) exists in the second electronic device 21, a PN junction (not shown) exists between an anode and a cathode of the integrated circuit, the PN junction makes the voltage drop of the second electronic device 21 in a loop lower, generally between 0.15V and 0.7V, hereinafter, the voltage drop of the second electronic device is taken as an example of 0.2V, and the second resistor R2 may have a larger resistance value, for example, the resistance value of the second resistor R2 is 1 m, that is, the voltage drop generated on the second control chip 21 is smaller than the voltage drop generated on the second resistor R2, for example, when the voltage of 5V at the first anode contact T11 is reduced by 0.2V after passing through the second control chip 21, the voltage at the first cathode contact T13 is 4.8V, the 4.8V is regarded as high by the first control chip 11, i.e. the first control chip 11 detects that the level state of the first negative contact T13 is high.
In this embodiment, when the second electronic device 20 is not placed in the first electronic device 10, the first positive contact T11 is disconnected from the second positive contact T21, the first communication contact T12 is disconnected from the second communication contact T22, the first negative contact T13 is disconnected from the second negative contact T23, at this time, the second communication contact T22 is connected to the power source VCC through the third resistor R3, and the level state of the second communication contact T22 is high; after the second electronic device 20 is placed in the first electronic device 10, the first communication contact T12 and the second communication contact T22 are correspondingly turned on, when the first negative contact T13 and the second negative contact T23 are correspondingly turned on, a second voltage division loop (not shown) is formed between the power VCC, the third resistor R3, the second communication contact T22, the first communication contact T12, the first resistor R1, the first negative contact T13, the second negative contact T23 and the ground, the second communication contact T22 is pulled down to a low level by the first resistor R1 (one end of the first resistor R1 is connected to the ground in the second electronic device), and at this time, the second control chip 21 detects that the second communication contact T22 is in a low level state, so as to determine that the second electronic device 20 is connected to the first electronic device 10.
In summary, in this embodiment, when the first electronic device 10 is connected to the second electronic device 20, a first voltage division loop is formed between the first positive contact T11, the second positive contact T21, the second control chip 21, the second negative contact T23, the first negative contact T13, the second resistor R2 and the ground, a level state of the first negative contact T13 is changed from a low level when the first electronic device 10 is not connected to the second electronic device 20 to a high level, and the first control chip 11 determines that the first electronic device 10 is connected to the second electronic device 20 when detecting that the first negative contact T13 is in a high level state; meanwhile, a second voltage division loop is formed between the power source VCC, the second communication contact T22, the first communication contact T12, the first resistor R1, the first negative contact T13, the second negative contact T23 and the ground, the second communication contact T22 is changed from a high level jump to a low level when the first electronic device 10 and the second electronic device 20 are not connected, and at this time, the second control chip 21 detects that the second communication contact T22 is in a low level state, so that it is determined that the second electronic device 20 is connected to the first electronic device 10; the first electronic device 10 and the second electronic device 20 can simultaneously detect whether the first electronic device 10 and the second electronic device 20 are connected with each other, so that the connection detection time of the first electronic device 10 and the second electronic device 20 can be shortened, and the implementation manner of the embodiment is independently completed by hardware circuits, so that the circuit is simple, the debugging is easy, and the power consumption of the first electronic device 10 and the power consumption of the second electronic device 20 can be reduced.
Further, the first electronic device 10 further includes: a charge control circuit 12, the charge control circuit 12 is connected to the first control chip 11 and the first negative contact T13, the charge control circuit 12 is used for pulling down the level of the first negative contact T13 under the control of the first control chip 11.
In this embodiment, since the first negative contact T13 is at a high level after the first electronic device 10 is connected to the second electronic device 20, the voltage of the first negative contact T13 is 4.8V as described above, although a voltage difference of 0.2V exists between 4.8V of the first negative contact T13 and 5V of the first positive contact T11, however, such a small voltage difference is not sufficient to enable charging of the second electronic device 20 by the first electronic device 10, and therefore in order to enable charging of the second electronic device 20 by said first electronic device 10, the charging control circuit 12 is provided between the first control chip 11 and the first negative contact T13, under the control of the first control chip 11, the charging control circuit 12 pulls down the first negative contact T13 to a low level, so that a complete charging loop is formed between the first positive contact T11 and the first negative contact T13, and the first electronic device 10 is enabled to charge the second electronic device 20. The charging control circuit 12 of the present embodiment will be described in detail below, and it should be understood that any design that achieves the above result through the conversion of the circuit form is included in the scope of the present invention.
Further, the charge control circuit 12 includes a field effect transistor Q; the gate of the field effect transistor Q is connected to the first control chip 11; the source of the field effect transistor Q is connected to the first negative contact T13; the drain of the field effect transistor Q is grounded.
In this embodiment, the field effect transistor Q is an N-channel field effect transistor, and the gate of the field effect transistor Q is connected to the first control chip 11, the source of the field effect transistor Q is connected to the first negative contact T13, the drain of the field effect transistor Q is connected to ground, after the first control chip 11 detects that the first electronic device 10 is connected to the second electronic device 20, the first control chip 11 outputs a high level to the gate, so that the field effect transistor Q is conducted, namely the source electrode and the drain electrode of the field effect transistor Q are conducted, because the drain is grounded, the first negative contact T13 is pulled low, so that a complete charging loop is formed between the first positive contact T11 and the first negative contact T13, and the first electronic device 10 charges the second electronic device 20. It is understood that the field effect transistor Q may be a P-channel field effect transistor Q, and any design that can achieve the above result by changing the type and number of transistors is included in the scope of the present invention.
Further, a first connection point a1 is arranged between the first control chip 11 and the first negative contact T13; the charging control circuit 12 includes a sampling resistor Rdet, one end of the sampling resistor Rdet is connected to the first connection point a1, and the other end of the sampling resistor Rdet is connected to the source of the field effect transistor Q.
In this embodiment, a first connection point a1 is disposed between the first control chip 11 and the first negative contact T13, one end of the sampling resistor Rdet is connected to the first connection point a1, and the other end of the sampling resistor Rdet is connected to the source of the field effect transistor Q, that is, the charging current flowing through the first negative contact T13 passes through the sampling resistor Rdet and the field effect transistor Q to ground; an analog-to-digital converter is arranged in the first control chip 11, a connection end between the first control chip 11 and the first negative contact T13 may be set as a voltage acquisition end of the analog-to-digital converter, the analog-to-digital converter acquires a voltage of the first negative contact T13, in different charging states, a charging current of the first electronic device 10 to the second electronic device 20 is different, a current flowing through the sampling resistor Rdet is also different, a voltage drop generated on the first negative contact T13 is also different, when the second electronic device 20 is charged up soon, the second electronic device 20 will stop charging automatically, at this time, the voltage on the first negative contact T13 is the minimum, and by acquiring the voltage of the first negative contact T13 and setting a suitable threshold, when the acquired voltage of the first negative contact T13 is lower than the threshold, the first control chip 11 determines that the second electronic device 20 is charged up, the first control chip 11 outputs a low level to the gate of the field effect transistor Q, controls the field effect transistor Q to be turned off, and the first negative contact T13 returns to a high level, so that the first electronic device 10 stops charging the second electronic device 20.
In the charging process, if the user suddenly takes out the second electronic device 20, the voltage of the first negative contact T13 directly becomes a level close to 0V, the first control chip 11 determines that the second electronic device 20 is taken out, after it is detected that the second electronic device 20 is taken out, the first control chip 11 turns off the field effect transistor Q, the first negative contact T13 changes to a low level state again, and the first electronic device 10 can resume connection detection of the second electronic device 20 (in this embodiment, in-box detection of the charging box on the wireless headset).
When the second electronic device 20 is placed in the first electronic device 10, but the second electronic device 20 is fully charged, the field effect transistor Q remains off, and the first negative contact T13 is at a high level; in this case, if the second electronic device 20 is suddenly taken out, the first negative contact T13 returns to the low level, and the first electronic device 10 considers that the second electronic device 20 is taken out. As can be seen from the above description, the first electronic device 10 can determine whether the second electronic device 20 is put in or taken out, regardless of whether the second electronic device is in the charging state.
When the second electronic device 20 is taken out from the first electronic device 10, the second communication contact T22 at the end of the second electronic device 20 returns to the high level state, and when the second electronic device 20 detects the high level state of the second communication contact T22, the second control chip 21 determines that the second electronic device 20 is taken out from the first electronic device 10.
In conclusion: whether the first electronic device 10 is powered or not, the second control chip 21 can determine whether the second electronic device 20 is put into the first electronic device 10 or taken out of the first electronic device 10; regardless of whether the second electronic device 20 is powered on or not, the first control chip 11 can determine whether the second electronic device 20 is placed in the first electronic device 10 or taken out of the first electronic device 10. Therefore, the problem that in the prior art, only under the condition that the wireless earphone and the charging box are charged, the wireless earphone and the charging box can detect whether the other side is put in or taken out is solved.
In addition, when the first electronic device 10 is connected to the second electronic device 20, the first control chip 11 controls the field effect transistor Q to be turned on, then the first communication contact T12 and the second communication contact T22 implement half-duplex communication through serial communication, the preset communication protocol controls the start, stop, and transmission of communication control commands, and the like, when the first communication contact T12 sends a signal, the second communication contact T22 receives the signal, after the first communication contact T12 finishes sending, the first communication contact T12 is changed to a receiving mode, the second communication contact T22 is changed to a sending mode, and signal reverse transmission is implemented, so that the duplex communication function between the first electronic device 10 and the second electronic device 20 can be implemented, more complex communication functions can be implemented, and the problem that the earphone box control earphone is basically implemented in the prior art is solved, the earphone box and the wireless earphone can only carry out simplex communication and cannot realize complex communication function. Further, the utility model discloses realize the signal communication of single line with independent port, wireless earphone's discrepancy box detection mode consumption can neglect basically, is applicable to TWS wireless earphone and charges the discrepancy box between the box and detect and communication control. The communication mode of the first electronic device 10 and the second electronic device 20 may adopt a UART communication protocol, and may also adopt other proposed protocols, both of which can implement a communication interaction function.
Further, a second connection point a2 is arranged between the first control chip 11 and the first connection point a 1; the charge control circuit 12 includes a filter capacitor C, one end of the filter capacitor C is connected to the second connection point a2, and the other end of the filter capacitor C is grounded.
In this embodiment, a second connection point a2 is provided between the first control chip 11 and the first connection point a1, one end of the filter capacitor C is connected to the second connection point a2, and the other end of the filter capacitor C is grounded, so that noise of the voltage signal collected from the first negative contact T13 is filtered by the filter capacitor C, and the accuracy of voltage signal collection is improved. In addition, a pull-up resistor R7 is further provided between the gate of the field effect transistor Q and ground, and a current limiting resistor R8 is further provided between the first connection point a1 and the second connection point a 2.
Referring to fig. 2, based on the above embodiment 1, the real-time embodiment 2 of the present invention is provided, and further, the connection detecting system 100 further includes a third electronic device 30, where the third electronic device 30 includes a third control chip 31, and a third positive contact T31, a third communication contact T32, and a third negative contact T33 connected to the third control chip 31, a fourth resistor R4 is connected between the third communication contact T32 and the power VCC, and the third negative contact T33 is grounded; the first positive contact T11 and the third positive contact T31 are correspondingly turned on or off, the first communication contact T12 and the third communication contact T32 are correspondingly turned on or off, the first negative contact T13 and the third negative contact T33 are correspondingly turned on or off, the first control chip 11 detects a level state of the first negative contact T13 to determine whether the first electronic device 10 is connected to the third electronic device 30, and/or the third control chip 31 detects a level state of the third communication contact T32 to determine whether the third electronic device 30 is connected to the first electronic device 10.
In this embodiment, the first electronic device 10 is a charging box, and in the second electronic device 20 and the third electronic device 30, one of them is a left ear wireless earphone, the other one is a right ear wireless earphone, the second electronic device 20 and the third electronic device 30 share the detection channel and the charging channel in the first electronic device 10, the method for detecting the entrance and the exit of the third electronic device 30 and charging the third electronic device 30 and the method for communicating with the third electronic device 30 are the same as those of the second electronic device 20, not described in detail herein, the present embodiment has the advantages that, no matter the user puts the left ear wireless earphone or the right ear wireless earphone into the charging box, through the charging box, the detection and charging of the in-out box of the left ear wireless earphone or the right ear wireless earphone can be realized, and the communication control between the charging box and the left ear wireless earphone or the right ear wireless earphone can be realized.
Referring to fig. 3, based on the embodiment 1, the real-time embodiment of the present invention is provided, in which the first electronic device 10 further includes a fourth communication contact T14 and a fourth negative contact T15 connected to the first control chip 11, a fifth resistor R5 is connected between the fourth communication contact T14 and the fourth negative contact T15, and a sixth resistor R6 is connected between the fourth negative contact T15 and the ground; the connection detection system 100 further includes a third electronic device 30, where the third electronic device 30 includes a third control chip 31, and a third positive contact T31, a third communication contact T32, and a third negative contact T33 connected to the third control chip 31, a fourth resistor R4 is connected between the third communication contact T32 and a power source VCC, and the third negative contact T33 is grounded; the first positive contact T11 and the third positive contact T31 are correspondingly turned on or off, the third communication contact T32 and the fourth communication contact T14 are correspondingly turned on or off, the third negative contact T33 and the fourth negative contact T15 are correspondingly turned on or off, the first control chip 11 detects a level state of the fourth negative contact T15 to determine whether the first electronic device 10 is connected to the third electronic device 30, and/or the third control chip 31 detects a level state of the third communication contact T32 to determine whether the third electronic device 30 is connected to the first electronic device 10.
In this embodiment, the first electronic device 10 is a charging box, one of the second electronic device 20 and the third electronic device 30 is a left-ear wireless earphone, the other one of the second electronic device 20 and the third electronic device 30 is a right-ear wireless earphone, the second electronic device 20 and the third electronic device 30 respectively use different detection channels and different charging channels in the first electronic device 10, and the in-out box detection, charging method and communication method of the third electronic device 30 are the same as those of the second electronic device 20, which is not described herein The detection of the left ear wireless earphone and the detection of the right ear wireless earphone in and out boxes are mutually independent and do not interfere with each other; the charging processes of the left ear wireless earphone and the right ear wireless earphone are independent and do not interfere with each other; the left ear wireless earphone, the right ear wireless earphone and the charging box are mutually independent in communication control and do not interfere with each other.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A connection detection system, characterized in that the connection detection system comprises:
the first electronic device comprises a first control chip, a first positive contact and a first negative contact which are connected with the first control chip, and a second resistor is connected between the first negative contact and the ground;
the second electronic device comprises a second control chip, and a second positive contact and a second negative contact which are connected with the second control chip, wherein the second negative contact is grounded;
the first positive electrode contact and the second positive electrode contact are correspondingly connected or disconnected, the first negative electrode contact and the second negative electrode contact are correspondingly connected or disconnected, and the first control chip detects the level state of the first negative electrode contact to judge whether the first electronic device is connected with the second electronic device.
2. The connection detection system of claim 1,
the first electronic device further comprises a first communication contact connected with the first control chip, and a first resistor is connected between the first communication contact and the first negative contact;
the second electronic equipment further comprises a second communication contact connected with the second control chip, and a third resistor is connected between the second communication contact and the power supply;
the first communication contact and the second communication contact are correspondingly connected or disconnected, and the second control chip detects the level state of the second communication contact so as to detect whether the second electronic equipment is connected with the first electronic equipment.
3. The connection detection system according to claim 2, wherein the first positive contact and the second positive contact are correspondingly conducted, when the first negative contact and the second negative contact are correspondingly conducted, a first voltage division loop is formed among the first positive contact, the second control chip, the second negative contact, the first negative contact, the second resistor and ground, and the first control chip detects that the first negative contact is in a high level state to determine that the first electronic device is connected with the second electronic device.
4. The connection detection system according to claim 3, wherein the first communication contact is in corresponding conduction with a second communication contact, when the first negative contact is in corresponding conduction with the second negative contact, a second voltage division loop is formed among the power supply, the second communication contact, the first resistor, the first negative contact, the second negative contact and ground, and the second control chip detects that the second communication contact is in a high level state to determine that the second electronic device is connected with the first electronic device.
5. The connection detection system of claim 4, wherein the first electronic device further comprises:
the charging control circuit is connected to the first control chip and the first negative contact, and the charging control circuit is used for pulling down the level of the first negative contact under the control of the first control chip.
6. The connection detection system of claim 5, wherein the charge control circuit comprises a field effect transistor;
the grid electrode of the field effect transistor is connected to the first control chip;
a gate source of the field effect transistor is connected to the first negative contact;
the drain of the field effect transistor is connected to ground.
7. The connection detection system of claim 6,
a first connecting point is arranged between the first control chip and the first negative contact;
the charging control circuit comprises a sampling resistor, one end of the sampling resistor is connected to the first connecting point, and the other end of the sampling resistor is connected to the grid electrode of the field effect transistor.
8. The connection detection system of claim 7,
a second connection point is arranged between the first control chip and the first connection point;
the charging control circuit comprises a filter capacitor, one end of the filter capacitor is connected to the second connection point, and the other end of the filter capacitor is grounded.
9. The connection detection system according to any one of claims 1 to 8, further comprising a third electronic device including a third control chip and a third positive contact, a third communication contact and a third negative contact connected to the third control chip, wherein a fourth resistor is connected between the third communication contact and a power source, and the third negative contact is grounded;
the first positive contact and the third positive contact are correspondingly connected or disconnected, the first communication contact and the third communication contact are correspondingly connected or disconnected, the first negative contact and the third negative contact are correspondingly connected or disconnected, the first control chip detects the level state of the first negative contact to judge whether the first electronic device is connected with the third electronic device, and/or the third control chip detects the level state of the third communication contact to detect whether the third electronic device is connected with the first electronic device, the first electronic device is a charging box, and the second electronic device and the third electronic device are wireless earphones.
10. The connection detection system according to any one of claims 1 to 8, wherein the first electronic device further comprises a fourth communication contact connected to the first control chip and a fourth negative contact, a fifth resistor is connected between the fourth communication contact and the fourth negative contact, and a sixth resistor is connected between the fourth negative contact and ground;
the connection detection system further comprises a third electronic device, the third electronic device comprises a third control chip, and a third positive contact, a third communication contact and a third negative contact which are connected with the third control chip, a fourth resistor is connected between the third communication contact and the power supply, and the third negative contact is grounded;
the first positive contact and the third positive contact are correspondingly connected or disconnected, the third communication contact and the fourth communication contact are correspondingly connected or disconnected, the third negative contact and the fourth negative contact are correspondingly connected or disconnected, the first control chip detects the level state of the fourth negative contact to judge whether the first electronic device is connected with the third electronic device, and/or the third control chip detects the level state of the third communication contact to detect whether the third electronic device is connected with the first electronic device, the first electronic device is a charging box, and the second electronic device is a wireless earphone.
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| CN201922375244.9U CN211669346U (en) | 2019-12-25 | 2019-12-25 | Connection detection system |
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| CN201922375244.9U CN211669346U (en) | 2019-12-25 | 2019-12-25 | Connection detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315209A (en) * | 2021-06-29 | 2021-08-27 | 紫优科技(深圳)有限公司 | Charging bin circuit, charging bin terminal, charging method and networking method |
| WO2022121047A1 (en) * | 2020-12-08 | 2022-06-16 | 威创集团股份有限公司 | Detection system and video receiving box |
-
2019
- 2019-12-25 CN CN201922375244.9U patent/CN211669346U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121047A1 (en) * | 2020-12-08 | 2022-06-16 | 威创集团股份有限公司 | Detection system and video receiving box |
| CN113315209A (en) * | 2021-06-29 | 2021-08-27 | 紫优科技(深圳)有限公司 | Charging bin circuit, charging bin terminal, charging method and networking method |
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