CN210351299U

CN210351299U - Call control circuit

Info

Publication number: CN210351299U
Application number: CN201922039307.3U
Authority: CN
Inventors: 陈洪生
Original assignee: Zhengzhou Yuelong Electronic Technology Co ltd
Current assignee: Zhengzhou Yuelong Electronic Technology Co ltd
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-04-17
Anticipated expiration: 2029-11-23

Abstract

The utility model discloses a calling control circuit, which comprises a communication module and a power supply control circuit; the power supply control circuit comprises a field effect transistor and a call key, wherein a source electrode of the field effect transistor is connected with a direct current power supply, a drain electrode of the field effect transistor is electrically connected with a power supply end of the communication module, a pull-up resistor is connected between a grid electrode and the source electrode, the grid electrode is also connected with a current-limiting resistor and then connected with the anode of the power supply control diode, the cathode of the power supply control diode is electrically connected with the first end of the call key, and the second end of the call key is grounded; after a calling key is closed, the field effect tube is conducted, a drain electrode of the field effect tube generates power supply voltage for supplying power to the communication module, and the communication module sends a calling signal to the remote server; and the calling signal is also prompted by an alarm circuit after being sent. The utility model discloses a press the call key and can send calling signal, convenient operation to automatic power off saves the electric quantity after calling out the completion.

Description

Call control circuit

Technical Field

The utility model relates to a control circuit field especially relates to a call control circuit.

Background

In the prior art, when a person works outside, the person needs to locate and transmit information in time, and how to realize the function by simply pressing a call key is very necessary. On the other hand, in the process of circuit design, the energy and power saving of the circuit are also considered, and the long-time use is satisfied.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a call control circuit, solves among the prior art call control circuit use problem complicated, that the power consumption is high.

In order to solve the above technical problem, the present invention provides a call control circuit, which includes a communication module and a power supply control circuit; the power supply control circuit comprises a field effect transistor and a call key, wherein a source electrode of the field effect transistor is connected with a direct-current power supply, a drain electrode of the field effect transistor is electrically connected with a power supply end of the communication module, a pull-up resistor is connected between a grid electrode and the source electrode, the grid electrode is also connected with a current-limiting resistor and then connected with an anode of a power supply control diode, a cathode of the power supply control diode is electrically connected with a first end of the call key, and a second end of the call key is grounded; after the call key is closed, the field effect tube is conducted, the drain electrode of the field effect tube generates power supply voltage for supplying power to the communication module, and the communication module sends a call signal to a remote server.

Preferably, still include warning circuit, warning circuit includes bee calling organ and warning triode, supply voltage is connected to the one end electricity of bee calling organ, and the collecting electrode of warning triode is connected to the other end, warning triode's projecting pole ground connection, base access communication module, after remote server received calling signal, communication module control the warning triode switches on, bee calling organ reports an emergency and asks for help or increased vigilance.

Preferably, the power supply device further comprises a power supply maintaining circuit, the power supply maintaining circuit comprises a control triode and a control resistor, the communication module is an AIR202 module, a power output end of the AIR202 module is connected with a first end of the control resistor, a second end of the control resistor is connected to a base of the control triode, a collector of the control triode is electrically connected with an anode of the power supply control diode, and an emitter of the control triode is grounded.

Preferably, the power supply detection circuit comprises a detection diode, the positive electrode of the detection diode is electrically connected with the carrier detection end of the AIR202 module, the negative electrode of the detection diode is electrically connected with the first end of the call key, and a filter capacitor is further connected between the first end and the second end of the call key.

Preferably, the wireless communication device further comprises a cancellation sending circuit, the cancellation sending circuit comprises a reset key and a reset resistor, a first end of the reset resistor is electrically connected with a second end of the control resistor, a second end of the reset resistor is connected with one end of the reset key, and the other end of the reset key is grounded; after the reset key is closed, the AIR202 module cancels the sending of the call information.

Preferably, the charging circuit is further included, and the direct current power supply is generated by a storage battery; the charging circuit comprises a chip TP4056, a charging end of the chip TP4056 is electrically connected with the anode of the storage battery, a power supply end is connected with a +5.3V power supply, and a charging detection end and a standby end of the chip TP4056 are respectively connected with the AIR202 module.

Preferably, the charging start-up circuit comprises a start-up control triode, a base electrode of the start-up control triode is connected with a +5.3V power supply after being connected with a first start-up voltage division resistor, and is grounded after being connected with a second start-up voltage division resistor, a collector electrode of the start-up control triode is electrically connected with a negative electrode of the power supply control diode, and an emitter electrode of the start-up control triode is grounded.

Preferably, the shutdown circuit comprises a shutdown control resistor, a state indication end of the AIR202 module is electrically connected to a first end of the shutdown control resistor, a second end of the shutdown control resistor is electrically connected to a second end of the control resistor, and the second end of the shutdown control resistor is also connected to a resistor and then grounded; when the AIR202 module finishes sending a call signal and the buzzer alarms, the state indicating end of the AIR202 module outputs a low level, and the control triode and the field effect transistor are both cut off.

Preferably, the call display circuit further comprises a first light emitting diode, an anode of the first light emitting diode is connected to the AIR202 module, and a cathode of the first light emitting diode is connected to a resistor and then grounded.

Preferably, the electric quantity display circuit further comprises a second light emitting diode, the anode of the second light emitting diode is connected to the AIR202 module, and the cathode of the second light emitting diode is connected to a resistor and then grounded.

The utility model has the advantages that: the utility model discloses a calling control circuit, which comprises a communication module and a power supply control circuit; the power supply control circuit comprises a field effect transistor and a call key, wherein a source electrode of the field effect transistor is connected with a direct current power supply, a drain electrode of the field effect transistor is electrically connected with a power supply end of the communication module, a pull-up resistor is connected between a grid electrode and the source electrode, the grid electrode is also connected with a current-limiting resistor and then connected with the anode of the power supply control diode, the cathode of the power supply control diode is electrically connected with the first end of the call key, and the second end of the call key is grounded; after a calling key is closed, the field effect tube is conducted, a drain electrode of the field effect tube generates power supply voltage for supplying power to the communication module, and the communication module sends a calling signal to the remote server; and the calling signal is also prompted by an alarm circuit after being sent. The utility model discloses a press the call key and can send calling signal, convenient operation to automatic power off saves the electric quantity after calling out the completion.

Drawings

Fig. 1 is a schematic diagram of a circuit configuration in an embodiment of a call control circuit according to the present invention;

fig. 2 is a communication module in another embodiment of a call control circuit according to the present invention;

fig. 3 is a power supply control circuit in another embodiment of a call control circuit according to the present invention;

fig. 4 is an alarm circuit in another embodiment of a call control circuit according to the present invention;

fig. 5 is a charging circuit in another embodiment of a call control circuit according to the present invention;

fig. 6 is a call display circuit in another embodiment of a call control circuit according to the present invention;

fig. 7 is a circuit for displaying power in another embodiment of the call control circuit according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, 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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the call control circuit includes a communication module 1, a power supply control circuit 2 and an alarm circuit 3, the power supply control circuit 2 is configured to supply power to the communication module 1, the communication module 1 can send a call signal to the remote server 11 after being powered on, and after receiving the call signal, the remote server 11 starts to alarm by the alarm circuit 3 to prompt a user that the call is successful.

The call control circuit further comprises a power supply maintaining circuit 4, and when the communication module 1 is powered on and started up, the power supply maintaining circuit 4 is used for maintaining the power on, so that the communication module 1 is ensured to be in a working state.

The power supply detection circuit 5 is further included, and the power supply detection circuit 5 is used for detecting whether the communication module 1 is in a power-on state or not.

The system also comprises a cancellation sending circuit 8 (also called as a reset circuit), when a user triggers the call signal by mistake or wants to cancel the call signal, the call signal exists for a certain time (3 s-4 s) in the sending process, so that the sending of the call signal can be cancelled in time through the cancellation sending circuit 8.

The power supply control circuit 1 is supplied with power from the secondary battery 9, and therefore, a charging circuit 6 that charges the secondary battery 9 is further included in the call control circuit. In the charging process, the communication module 1 can also be started up to work by connecting the charging start-up circuit 7 with the external power supply 10, but the communication module cannot send a calling signal by the charging start-up mode, and the calling signal is only sent out by the communication module 1 controlled by the power supply control circuit 2. That is, the call message can be transmitted only in the non-charging mode by turning on the communication module 1 by the power supply control circuit 2.

When the call signal is successfully sent and the alarm circuit 3 prompts that the call is successful, the communication module 1 is automatically powered off through the shutdown circuit 12, so that the purposes of energy saving and power saving are achieved.

In particular, as shown in fig. 2 and 3. Fig. 2 is a schematic diagram of a communication module, which is an AIR202 module. In fig. 3, the power supply control circuit includes a fet Q2 and a call key S1, a source S of the fet Q2 is connected to a dc power supply + E (the dc power supply + E is generated by a battery J2), a drain is electrically connected to a power supply terminal (VBAT) of the communication module in fig. 2, a pull-up resistor R8 is connected between a gate and the source, the gate is further connected to a current-limiting resistor R10 and then connected to an anode of a power supply control diode D5, a cathode of the power supply control diode D5 is electrically connected to a first terminal of the call key S1, and a second terminal of the call key S1 is grounded; after the call key S1 is closed, the fet Q2 is turned on, and the drain of the fet Q2 generates the supply voltage VCC _ GPRS for supplying power to the communication module in fig. 2, and the communication module sends a call signal to the remote server.

As shown in fig. 4, the alarm circuit includes a buzzer B1 and an alarm transistor Q1, and both ends of the buzzer B1 are connected with a protection diode D1. One end of the buzzer B1 is electrically connected with a power supply voltage VCC _ GPRS, the other end is connected to a collector of the alarm triode Q1, an emitter of the alarm triode Q1 is grounded, a base is connected to the output end UART2_ TXD/GPIO _5 of the communication module in fig. 2, after the remote server receives a call signal, the output end UART2_ TXD/GPIO _5 of the communication module outputs high level to control the alarm triode Q1 to be conducted, and the buzzer B1 alarms to prompt that the call signal is successfully sent.

Preferably, a power supply maintaining circuit is further included in fig. 3, it can be seen that the communication module can obtain the power supply voltage VCC _ GPRS after the call key S1 is closed, in order to avoid that the communication module can be powered on when the call key S1 is always in the closed state, the communication module is powered on by the power supply maintaining circuit to satisfy the subsequent operation, and the call key S1 is not necessarily always closed.

The power supply maintaining circuit comprises a control triode Q3 and a control resistor R11, a power supply output end VDDIO of the AIR202 module (namely, the communication module) is connected with a first end of a control resistor R11, a second end of the control resistor R11 is connected to a base electrode of a control triode Q3, a collector electrode of the control triode Q3 is electrically connected with an anode of a power supply control diode D5, and an emitter electrode of the control triode Q3 is grounded.

After the call key S1 is closed, the AIR202 module obtains a power supply voltage VCC _ GPRS, meanwhile, the power supply output end VDDIO of the AIR202 module outputs a high level, the control triode Q3 is conducted and grounded through the control resistor R11, and the conduction of the control triode Q3 ensures that the field effect transistor Q2 is also in a conduction state, so that the AIR202 module continuously obtains the power supply voltage VCC _ GPRS.

Preferably, in fig. 3, the power supply detection circuit further includes a detection diode D4, the positive electrode of the detection diode D4 is electrically connected to the carrier detection terminal UART1_ DTR/GPIO _29 of the AIR202 module in fig. 2, it should be noted that sw _ gj is marked at the end of the positive electrode of the detection diode D4, and sw _ gj is marked at the end of the carrier detection terminal UART1_ DTR/GPIO _29 of the AIR202 module to indicate that they are electrically connected to each other, which is not described herein. The cathode of the detection diode D4 is electrically connected with the first end of the call key S1, and a filter capacitor C6 is also connected between the first end and the second end of the call key S1.

The power supply detection circuit is used for detecting whether the AIR202 module is in a power supply state, when the AIR202 module is in a power off state, the direct current power supply + E charges the capacitor C6 through the pull-up resistor R8, the current-limiting resistor R10 and the power supply control diode D5, after the capacitor C6 is charged, the negative electrode of the detection diode D4 is at a high level, namely, when the power off state is realized, sw _ gj is at a high level.

When the AIR202 module is in the power-on state, the cathode of the power control diode D5 is grounded, and the cathode of the detection diode D4 is at a low level, i.e., in the power-off state, sw _ gj is at a low level.

Preferably, in fig. 3, the canceling transmitting circuit further includes a reset key S2 and a reset resistor R12, a first end of the reset resistor R12 is electrically connected to a second end of the control resistor R11, a second end of the reset resistor R12 is connected to one end of the reset key S2, and the other end of the reset key S2 is grounded; after closing the reset key S2, the AIR202 module cancels the transmission of the call information.

When a user triggers a calling signal by mistake or wants to cancel the calling signal, because the calling signal has a certain time (3S-4S) in the sending process, the high level output by the power supply output end VDDIO of the AIR202 module is grounded by closing the reset key S2, the control triode Q3 and the field effect transistor Q2 are both cut off, and the sending of the calling signal is cancelled. It can be seen that the reset key S2 can also be used as a power-off key.

Preferably, as shown in fig. 5, the charging device further comprises a charging circuit, and the charging circuit is used for charging the storage battery J2 in fig. 3. The charging circuit comprises a chip TP4056, a charging terminal BAT of the chip TP4056 is electrically connected with the anode of the storage battery J2, a power supply terminal VCC is connected to a +5.3V power supply, and a charging detection terminal CHRG and a standby terminal STDBY of the chip TP4056 are respectively connected to an input terminal UART1_ DCD/GPIO _31 and an input terminal UART1_ RI/GPIO _30 of the AIR202 module in FIG. 2. The input terminal UART1_ DCD/GPIO _31 is used for detecting whether the storage battery J2 is charged or not, and the input terminal UART1_ RI/GPIO _30 is used for detecting whether the storage battery J2 is fully charged or not.

In fig. 5, the chip TP4056 is connected to a +5.3V power supply through the USB interface J3 to charge the battery.

Preferably, in fig. 3, the charging boot-up circuit is further included, the charging boot-up circuit includes a boot-up control triode Q4, a base of the boot-up control triode Q4 is connected to the +5.3V power supply after being connected to the first boot-up voltage-dividing resistor R13, and is also connected to the second boot-up voltage-dividing resistor R15 and then grounded, a collector of the boot-up control triode Q4 is electrically connected to the negative electrode of the power supply control diode D5, and an emitter of the boot-up control triode Q4 is.

When the storage battery J2 is charged, the power-on control triode Q4 is conducted, further the field effect transistor Q2 is controlled to be conducted, the AIR202 module is controlled to be electrified, and a calling message is not sent in the process.

Preferably, in fig. 3, the shutdown circuit further includes a shutdown control resistor R14, the state indication end of the AIR202 module in fig. 2 is electrically connected to a first end of the shutdown control resistor, a second end of the shutdown control resistor R14 is electrically connected to a second end of the control resistor, and the second end of the shutdown control resistor is further connected to a resistor and then grounded; after the AIR202 module finishes sending the call signal and the buzzer alarms, the status indication terminal 32K _ OUT/GPIO _33 of the AIR202 module outputs a low level to control both the transistor Q3 and the fet Q2 to be turned off. Of course, the status indication terminal 32K _ OUT/GPIO _33 of the AIR202 module may also be used as another power supply maintaining circuit when outputting a high level.

The AIR202 module is automatically shut down through the shutdown circuit, so that long-time power supply is avoided, and the purposes of energy conservation and power saving are achieved.

As shown in fig. 6, the apparatus further includes a call display circuit, the call display circuit includes a first light emitting diode D3, an anode of the first light emitting diode D3 is connected to the power output terminal VDDIO of the AIR202 module, a cathode of the first light emitting diode D3 is connected to a resistor R4 and then grounded, when a call signal is sent, the first light emitting diode D3 is controlled to emit light, although the first light emitting diode D3 can also be used for power-on display, and after the AIR202 module is powered, the first light emitting diode D3 is used for light-on display.

With reference to fig. 7, the electronic device further includes a power display circuit, the power display circuit includes a second light emitting diode D2, an anode of the second light emitting diode D2 is connected to the output end SPI1_ CLK/GPIO _8 of the AIR202 module in fig. 2, a cathode of the second light emitting diode D2 is connected to a resistor R3 and then grounded, when the battery J2 is fully charged, the standby terminal STDBY of the chip TP4056 outputs a low level, the output end SPI1_ CLK/GPIO _8 of the AIR202 module outputs a high level, and the second light emitting diode D2 is normally on. If the battery J2 is not fully charged, the second light emitting diode D2 blinks.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.

Claims

1. A call control circuit, comprising: the device comprises a communication module and a power supply control circuit; the power supply control circuit comprises a field effect transistor and a call key, wherein a source electrode of the field effect transistor is connected with a direct-current power supply, a drain electrode of the field effect transistor is electrically connected with a power supply end of the communication module, a pull-up resistor is connected between a grid electrode and the source electrode, the grid electrode is also connected with a current-limiting resistor and then connected with an anode of a power supply control diode, a cathode of the power supply control diode is electrically connected with a first end of the call key, and a second end of the call key is grounded; after the call key is closed, the field effect tube is conducted, the drain electrode of the field effect tube generates power supply voltage for supplying power to the communication module, and the communication module sends a call signal to a remote server.

2. The call control circuit of claim 1, wherein: still include warning circuit, warning circuit includes bee calling organ and warning triode, supply voltage is connected to the one end electricity of bee calling organ, and the collecting electrode of the triode is reported an emergency and asked for help or increased vigilance in the other end access, report an emergency and ask for help or increased vigilance the projecting pole ground connection of triode, the base inserts communication module, after remote server received calling signal, communication module control report an emergency and ask for help or increased vigilance the triode and switch on, bee calling organ reports an emergency and asks for.

3. The call control circuit of claim 2, wherein: the power supply maintaining circuit comprises a control triode and a control resistor, the communication module is an AIR202 module, the power output end of the AIR202 module is connected with the first end of the control resistor, the second end of the control resistor is connected into the base electrode of the control triode, the collector electrode of the control triode is electrically connected with the anode of the power supply control diode, and the emitter electrode of the control triode is grounded.

4. The call control circuit of claim 3, wherein: still include power supply detection circuitry, power supply detection circuitry includes detection diode, detection diode's positive pole electric connection the carrier wave sense terminal of AIR202 module, negative pole electric connection the first end of calling key, still be connected with filter capacitor between the first end of calling key and the second end.

5. The call control circuit of claim 4, wherein: the canceling and sending circuit comprises a reset key and a reset resistor, wherein the first end of the reset resistor is electrically connected with the second end of the control resistor, the second end of the reset resistor is connected with one end of the reset key, and the other end of the reset key is grounded; after the reset key is closed, the AIR202 module cancels the sending of the call information.

6. The call control circuit of claim 5, wherein: the charging circuit is also included, and the direct current power supply is generated by a storage battery; the charging circuit comprises a chip TP4056, a charging end of the chip TP4056 is electrically connected with the anode of the storage battery, a power supply end is connected with a +5.3V power supply, and a charging detection end and a standby end of the chip TP4056 are respectively connected with the AIR202 module.

7. The call control circuit of claim 6, wherein: the charging starting circuit comprises a starting control triode, a base electrode of the starting control triode is connected with a +5.3V power supply after being connected with a first starting voltage-dividing resistor and is grounded after being connected with a second starting voltage-dividing resistor, a collector electrode of the starting control triode is electrically connected with a negative electrode of the power supply control diode, and an emitter electrode of the starting control triode is grounded.

8. The call control circuit of claim 7, wherein: the shutdown circuit comprises a shutdown control resistor, a state indicating end of the AIR202 module is electrically connected with a first end of the shutdown control resistor, a second end of the shutdown control resistor is electrically connected with a second end of the control resistor, and the second end of the shutdown control resistor is also connected with a resistor and then grounded; when the AIR202 module finishes sending a call signal and the buzzer alarms, the state indicating end of the AIR202 module outputs a low level, and the control triode and the field effect transistor are both cut off.

9. The call control circuit of claim 8, wherein: the calling display circuit comprises a first light emitting diode, the anode of the first light emitting diode is connected into the AIR202 module, and the cathode of the first light emitting diode is connected with a resistor and then grounded.

10. The call control circuit of claim 9, wherein: the electric quantity display circuit comprises a second light emitting diode, the anode of the second light emitting diode is connected into the AIR202 module, and the cathode of the second light emitting diode is connected with a resistor and then grounded.