Interphone charging protection socket circuit

Abstract

The utility model relates to the technical field of circuits, in particular to an interphone charging protection socket circuit. Comprising a single-chip microcomputer, a first pin of the single-chip microcomputer is divided into two paths which are respectively connected with a cathode of a sixth light-emitting diode and a cathode of a seventh light-emitting diode, an anode of the sixth light-emitting diode and an anode of the seventh light-emitting diode are combined and then jointly connected with one end of a thirteenth resistor, the other end of the thirteenth resistor is connected with + 3.3 V voltage, a second pin of the single-chip microcomputer is divided into two paths which are respectively connected with an anode of the sixth light-emitting diode and an anode of the seventh light-emitting diode. The other end of the first button and the other end of the fourteenth capacitor are combined and then jointly grounded, and a third pin of the single-chip microcomputer is divided into two paths which are respectively connected with a cathode of a fifth light-emitting diode and a cathode of a third light-emitting diode. Compared with the prior art, the interphone charging protection socket circuit is improved on the basis of an existing interphone charging protection socket circuit, the automatic charging recovery function is achieved through the design of the single-chip microcomputer, and the power-on recovery button is additionally arranged and used for manually recovering the charging function after power-off protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical technical field, and specifically is a kind of intercom charging protection socket circuit. BACKGROUND

[0002] Due to the subway station is built in underground environment, signal is influenced, so the staff in subway station uses intercom to communicate more.But the intercom of current charging process, although the socket with overcharge prevention function is purchased, but in actual use, still there will be bad charging situation.And in the existing charging protection socket, after breaking, intercom cannot automatically resume charging, intercom continues to consume power in the condition of not being used, and the staff in subway station cannot always pay attention to the battery condition of intercom, so there will be the situation of insufficient power of intercom when needing to use intercom. SUMMARY

[0003] The utility model provides a kind of intercom charging protection socket circuit to overcome the deficiency of prior art.

[0004] In order to achieve the above object, a kind of intercom charging protection socket circuit is designed, including single-chip microcomputer, the No.1 pin of the single-chip microcomputer is divided into two paths, respectively connect the cathode of light-emitting diode six, the cathode of light-emitting diode seven, the anode of light-emitting diode six and the anode of light-emitting diode seven are merged and commonly connected to one end of resistor thirteen, the other end of resistor thirteen is connected to +3.3V voltage, the No.2 pin of the single-chip microcomputer is divided into two paths, respectively connect one end of button one and one end of capacitor fourteen, the other end of button one and the other end of capacitor fourteen are merged and commonly grounded, the No.3 pin of the single-chip microcomputer is divided into two paths, respectively connect the cathode of light-emitting diode five and the cathode of light-emitting diode three, the anode of light-emitting diode five and the anode of light-emitting diode three are merged and commonly connected to one end of resistor ten, the other end of resistor ten is connected to +3.3V voltage, the No.5 pin and the No.6 pin of the single-chip microcomputer are merged and commonly connected to one end of ferrite magnetic bead two and one end of capacitor fifteen, the other end of ferrite magnetic bead two is connected to 3.3V voltage, the other end of capacitor fifteen is grounded, the No.7 pin of the single-chip microcomputer is grounded, the No.8 pin of the single-chip microcomputer is connected to the No.3 pin of program burning port, the No.9 pin of the single-chip microcomputer is connected to the No.2 pin of program burning port, the No.11 pin of the single-chip microcomputer is connected to the cathode of light-emitting diode eight, the anode of light-emitting diode eight is connected to one end of resistor fourteen, the other end of resistor fourteen is connected to 3.3V voltage, the No.15 pin of the single-chip microcomputer is connected to one end of resistor eleven respectively, the other end of resistor eleven is connected to one end of capacitor thirteen, the base of triode one and one end of resistor twelve respectively, the other end of capacitor thirteen, the emitter of triode one and the other end of resistor twelve are merged and commonly grounded, the collector of triode one is connected to the anode of diode four and the No.1 port of relay one respectively, the No.4 port of relay one is connected to one end of resistor four, the other end of resistor four and the cathode of diode four are merged and commonly connected to +5V voltage, the No.2 port of relay one is connected to signal interface four, the No.5 port of relay one is connected to signal interface one, one end of resistor one and one end of resistor six respectively, the No.16 pin of the single-chip microcomputer is connected to the No.10 pin of control chip, the No.18 pin of the single-chip microcomputer is connected to the No.8 pin of control chip, the No.19 pin of the single-chip microcomputer is connected to the No.6 pin of control chip, the No.20 pin of the single-chip microcomputer is connected to the No.9 pin of control chip, the No.20 pin of the single-chip microcomputer is grounded.

[0005] One pin of the control chip is connected with one end of capacitor nine and one end of ferrite magnetic bead one, the other end of capacitor nine is grounded, the other end of ferrite magnetic bead one is connected with +3.3V voltage, two pin of the control chip is connected with one end of resistor three and one end of capacitor ten, the other end of resistor three is connected with one end of resistor two and signal interface three, three pin of the control chip is connected with one end of resistor five and one end of capacitor eleven, the other end of resistor five is connected with the other end of resistor two, signal interface two, one end of pressure sensitive resistor one and ground, the other end of capacitor eleven is grounded together with the other end of capacitor ten, four pin of the control chip is connected with one end of resistor nine, one end of capacitor twelve and one end of resistor eight, the other end of resistor eight is connected with one end of resistor seven, the other end of resistor seven is connected with the other end of resistor six, five pin of the control chip is connected with the other end of resistor nine and the other end of capacitor twelve, the other end of pressure sensitive resistor one is connected with the other end of resistor one and anode of diode one, cathode of diode one is connected with anode of diode two, cathode of diode two is connected with one end of capacitor seven and one end of inductor two, the other end of capacitor seven is grounded, the other end of inductor two is connected with one end of capacitor eight and power module, the other end of capacitor eight is grounded.

[0006] The power module comprises a power chip and a voltage stabilizing chip, the other end of inductor two is connected with four pin of the power chip, one pin of the power chip is connected with one end of inductor one, one end of capacitor one, one end of capacitor two, one end of capacitor three, one pin of the voltage stabilizing chip and three pin of the voltage stabilizing chip, and outputs +5V voltage, the other end of inductor one is connected with five pin of the power chip and six pin of the power chip, the other end of capacitor one is grounded, the other end of capacitor two is grounded, the other end of capacitor three is grounded, two pin of the power chip is grounded, two pin of the voltage stabilizing chip is grounded, five pin of the voltage stabilizing chip is connected with one end of capacitor four, one end of capacitor five and one end of capacitor six, and outputs +3.3V voltage, the other end of capacitor four, the other end of capacitor five and the other end of capacitor six are grounded together.

[0007] Four pin of the program burning port is connected with 3.3V voltage, one pin of the program burning port is grounded.

[0008] The model of the single-chip microcomputer is STC8H1K08-36I-QFN20.

[0009] The model of the relay one is 973-5VDC-SL-A.

[0010] The model of the control chip is BL0942.

[0011] The model of the power chip is BP8523D, and the model of the voltage stabilizing chip is ME6211C33M5G-N.

[0012] The utility model discloses an improved intercom charger protection socket circuit based on the prior art, and through the design of the single-chip microcomputer, the automatic recovery charging function is realized, and a recovery power-on button is additionally arranged to manually recover the charging function after power-off protection. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model discloses a circuit diagram. DETAILED DESCRIPTION

[0014] The utility model will be further explained in connection with the drawings.

[0015] As Figure 1As shown, the No. 1 pin of the single-chip microcomputer U4 is connected to the cathode of the light-emitting diode six D6, the cathode of the light-emitting diode seven D7, the anode of the light-emitting diode six D6 and the anode of the light-emitting diode seven D7 are combined and connected to one end of the resistor thirteen R13, the other end of the resistor thirteen R13 is connected to +3.3V voltage, the No. 2 pin of the single-chip microcomputer U4 is connected to one end of the button one SW1 and one end of the capacitor fourteen C14, the other end of the button one SW1 and the other end of the capacitor fourteen C14 are combined and grounded, the No. 3 pin of the single-chip microcomputer U4 is connected to the cathode of the light-emitting diode five D5 and the cathode of the light-emitting diode three D3, the anode of the light-emitting diode five D5 and the anode of the light-emitting diode three D3 are combined and connected to one end of the resistor ten R10, the other end of the resistor ten R10 is connected to +3.3V voltage, the No. 5 pin and the No. 6 pin of the single-chip microcomputer U4 are combined and connected to one end of the ferrite bead two FB2 and one end of the capacitor fifteen C15, the other end of the ferrite bead two FB2 is connected to 3.3V voltage, the other end of the capacitor fifteen C15 is grounded, the No. 7 pin of the single-chip microcomputer U4 is grounded, the No. 8 pin of the single-chip microcomputer U4 is connected to the No. 3 pin of the program burning port J1, the No. 9 pin of the single-chip microcomputer U4 is connected to the No. 2 pin of the program burning port J1, the No. 11 pin of the single-chip microcomputer U4 is connected to the cathode of the light-emitting diode eight D8, the anode of the light-emitting diode eight D8 is connected to one end of the resistor fourteen R14, the other end of the resistor fourteen R14 is connected to 3.3V voltage, the No. 15 pin of the single-chip microcomputer U4 is connected to one end of the resistor eleven R11, the other end of the resistor eleven R11 is connected to one end of the capacitor thirteen C13, the base of the transistor one Q1 and one end of the resistor twelve R12, the other end of the capacitor thirteen C13, the emitter of the transistor one Q1 and the other end of the resistor twelve R12 are combined and grounded, the collector of the transistor one Q1 is connected to the anode of the diode four D4 and the No. 1 port of the relay one K1, the No. 4 port of the relay one K1 is connected to one end of the resistor four R4, the other end of the resistor four R4 and the cathode of the diode four D4 are combined and connected to +5V voltage, the No. 2 port of the relay one K1 is connected to the signal interface four TP4, the No. 5 port of the relay one K1 is connected to the signal interface one TP1, one end of the resistor one R1 and one end of the resistor six R6, the No. 16 pin of the single-chip microcomputer U4 is connected to the No. 10 pin of the control chip U3, the No. 18 pin of the single-chip microcomputer U4 is connected to the No. 8 pin of the control chip U3, the No. 19 pin of the single-chip microcomputer U4 is connected to the No. 6 pin of the control chip U3, the No. 20 pin of the single-chip microcomputer U4 is connected to the No. 9 pin of the control chip U3, and the No. 20 pin of the single-chip microcomputer U4 is grounded.

[0016] The one pin of the control chip U3 is connected with one end of the capacitor nine C9 and one end of the ferrite bead one FB1, the other end of the capacitor nine C9 is grounded, the other end of the ferrite bead one FB1 is connected with +3.3V voltage, the two pin of the control chip U3 is connected with one end of the resistor three R3 and one end of the capacitor ten C10, the other end of the resistor three R3 is connected with one end of the resistor two R2 and the signal interface three TP3, the three pin of the control chip U3 is connected with one end of the resistor five R5 and one end of the capacitor eleven C11, the other end of the resistor five R5 is connected with the other end of the resistor two R2, the signal interface two TP2, one end of the pressure sensitive resistor one TVR1 and the ground, the other end of the capacitor eleven C11 and the other end of the capacitor ten C10 are grounded, the four pin of the control chip U3 is connected with one end of the resistor nine R9, one end of the capacitor twelve C12 and one end of the resistor eight R8, the other end of the resistor eight R8 is connected with one end of the resistor seven R7, the other end of the resistor seven R7 is connected with the other end of the resistor six R6, the five pin of the control chip U3 is connected with the other end of the resistor nine R9 and the other end of the capacitor twelve C12, the other end of the pressure sensitive resistor one TVR1 is connected with the other end of the resistor one R1 and the anode of the diode one D1, the cathode of the diode one D1 is connected with the anode of the diode two D2, the cathode of the diode two D2 is connected with one end of the capacitor seven C7 and one end of the inductor two L2, the other end of the capacitor seven C7 is grounded, the other end of the inductor two L2 is connected with one end of the capacitor eight C8 and the power module, the other end of the capacitor eight C8 is grounded.

[0017] The power module includes the power chip U2 and the voltage stabilizing chip U1, the other end of the inductor two L2 is connected with the four pin of the power chip U2, the one pin of the power chip U2 is connected with one end of the inductor one L1, one end of the capacitor one C1, one end of the capacitor two C2, one end of the capacitor three C3, the one pin of the voltage stabilizing chip U1, the three pin of the voltage stabilizing chip U1, and outputs +5V voltage, the other end of the inductor one L1 is connected with the five pin and the six pin of the power chip U2, the other end of the capacitor one C1 is grounded, the other end of the capacitor two C2 is grounded, the other end of the capacitor three C3 is grounded, the two pin of the power chip U2 is grounded, the two pin of the voltage stabilizing chip U1 is grounded, the five pin of the voltage stabilizing chip U1 is connected with one end of the capacitor four C4, one end of the capacitor five C5 and one end of the capacitor six C6, and outputs +3.3V voltage, the other end of the capacitor four C4, the other end of the capacitor five C5 and the other end of the capacitor six C6 are grounded. In the embodiment, the power module converts the power supply voltage into the power voltage for the control chip U3, the single-chip microcomputer U4 and the several light emitting diodes.

[0018] The No. 4 pin of the program burning port J1 is connected with 3.3V voltage, and the No. 1 pin of the program burning port J1 is grounded. Since the subway control room is usually designed and installed in underground environment, the underground environment is easy to cause instability of the circuit. Since the circuit of the embodiment has the built-in program burning port, the user can customize the modification and adjustment of the protection triggering condition of the circuit according to the actual situation, such as the time interval of the recovery charging after the power-off protection, the current of the protection circuit and other parameters.

[0019] In the embodiment, the model of the single-chip microcomputer U4 is STC8H1K08-36I-QFN20. The model of the relay K1 is 973-5VDC-SL-A. The model of the control chip U3 is BL0942. The model of the power supply chip U2 is BP8523D, and the model of the voltage stabilizing chip U1 is ME6211C33M5G-N.

[0020] In the embodiment, whether the intercom battery is fully charged is judged by the current and voltage in the circuit during the charging process. After the intercom battery is judged to be fully charged, the protection device automatically disconnects the power supply to prevent overcharging of the battery, thereby ensuring the safe use of electricity in the subway and ensuring the operation of the subway. Moreover, the single-chip microcomputer controls the time interval to restore the charging, thereby solving the problem that the on-duty personnel do not need to pay attention to whether the charging is manually started for a long time and easily forget to cause long-term power-off and non-charging. The No. 6 pin of the U3 control chip is the CF1 power state output, which is configured by the register and connected with the No. 19 pin of the U4 single-chip microcomputer. When the current and voltage are lower than the preset value, the charging is disconnected. When the power-off time is greater than the preset time value, the charging is automatically restored.

[0021] The embodiment is suitable for charging protection of small-power batteries such as intercoms for subways. Considering the instability of old batteries of some models of intercoms for subways, the batteries are not fully charged after the power-off protection. In the embodiment, the button SW1 is added as a power-on reset switch. By pressing the button SW1, the charging of the intercom battery is physically restored.

Claims

1. A intercom charging protection socket circuit, comprising a single-chip microcomputer, characterized in that: The 1st pin of the single-chip microcomputer (U4) is connected with the cathode of the sixth light-emitting diode (D6) and the cathode of the seventh light-emitting diode (D7) in two ways, the anode of the sixth light-emitting diode (D6) and the anode of the seventh light-emitting diode (D7) are connected with one end of the thirteenth resistor (R13) in common, the other end of the thirteenth resistor (R13) is connected with +3.3V voltage, the 2nd pin of the single-chip microcomputer (U4) is connected with one end of the first button (SW1) and one end of the fourteenth capacitor (C14) in two ways, the other end of the first button (SW1) and the other end of the fourteenth capacitor (C14) are connected with ground in common, the 3rd pin of the single-chip microcomputer (U4) is connected with the cathode of the fifth light-emitting diode (D5) and the cathode of the third light-emitting diode (D3) in two ways, the anode of the fifth light-emitting diode (D5) and the anode of the third light-emitting diode (D3) are connected with one end of the tenth resistor (R10) in common, the other end of the tenth resistor (R10) is connected with +3.3V voltage, the 5th pin and the 6th pin of the single-chip microcomputer (U4) are connected with one end of the second ferrite bead (FB2) and one end of the fifteenth capacitor (C15) in common, the other end of the second ferrite bead (FB2) is connected with 3.3V voltage, the other end of the fifteenth capacitor (C15) is connected with ground, the 7th pin of the single-chip microcomputer (U4) is connected with ground, the 8th pin of the single-chip microcomputer (U4) is connected with the 3rd pin of the first terminal (J1), the 9th pin of the single-chip microcomputer (U4) is connected with the 2nd pin of the first terminal (J1), the 11th pin of the single-chip microcomputer (U4) is connected with the cathode of the eighth light-emitting diode (D8), the anode of the eighth light-emitting diode (D8) is connected with one end of the fourteenth resistor (R14), the other end of the fourteenth resistor (R14) is connected with 3.3V voltage, the 15th pin of single-chip microcomputer (U4) is connected with one end of resistor eleven (R11) respectively, the other end of resistor eleven (R11) is connected with one end of capacitor thirteen (C13), base of triode one (Q1), one end of resistor twelve (R12) respectively, the other end of capacitor thirteen (C13), emitter of triode one (Q1), the other end of resistor twelve (R12) are merged and commonly grounded, the collector of triode one (Q1) is connected with the anode of diode four (D4), the 1st port of relay one (K1) respectively, the 4th port of relay one (K1) is connected with one end of resistor four (R4), the other end of resistor four (R4) and the cathode of diode four (D4) are merged and commonly connected with +5V voltage, the 2nd port of relay one (K1) is connected with signal interface four (TP4), the 5th port of relay one (K1) is connected with signal interface one (TP1), one end of resistor one (R1), one end of resistor six (R6) respectively, the 16th pin of single-chip microcomputer (U4) is connected with the 10th pin of control chip (U3), the 18th pin of single-chip microcomputer (U4) is connected with the 8th pin of control chip (U3), the 19th pin of single-chip microcomputer (U4) is connected with the 6th pin of control chip (U3), the 20th pin of single-chip microcomputer (U4) is connected with the 9th pin of control chip (U3), the 20th pin of single-chip microcomputer (U4) is grounded.

2. A squelch charger protection jack circuit according to claim 1, characterized in that: One pin of the control chip (U3) is connected with one end of capacitor nine (C9) and one end of ferrite bead one (FB1) respectively, the other end of capacitor nine (C9) is grounded, the other end of ferrite bead one (FB1) is connected with +3.3V voltage, the second pin of control chip (U3) is connected with one end of resistance three (R3) and one end of capacitor ten (C10) respectively, the other end of resistance three (R3) is connected with one end of resistance two (R2) and signal interface three (TP3) respectively, the third pin of control chip (U3) is connected with one end of resistance five (R5) and one end of capacitor eleven (C11) respectively, the other end of resistance five (R5) is connected with the other end of resistance two (R2), signal interface two (TP2), one end of pressure sensitive resistance one (TVR1) and ground respectively, the other end of capacitor eleven (C11) and the other end of capacitor ten (C10) are merged and grounded together, the fourth pin of control chip (U3) is connected with one end of resistance nine (R9), one end of capacitor twelve (C12) and one end of resistance eight (R8) respectively, the other end of resistance eight (R8) is connected with one end of resistance seven (R7), the other end of resistance seven (R7) is connected with the other end of resistance six (R6), the fifth pin of control chip (U3) is connected with the other end of resistance nine (R9) and the other end of capacitor twelve (C12) and grounded, the other end of pressure sensitive resistance one (TVR1) is connected with the other end of resistance one (R1) and anode of diode one (D1) respectively, cathode of diode one (D1) is connected with anode of diode two (D2), cathode of diode two (D2) is connected with one end of capacitor seven (C7) and one end of inductor two (L2) respectively, the other end of capacitor seven (C7) is grounded, the other end of inductor two (L2) is connected with one end of capacitor eight (C8) and power module respectively, the other end of capacitor eight (C8) is grounded.

3. A squelch charger protection jack circuit according to claim 2, wherein: The power module comprises power chip (U2) and voltage stabilizing chip (U1), the other end of inductor two (L2) is connected with the fourth pin of power chip (U2), the first pin of power chip (U2) is connected with one end of inductor one (L1), one end of capacitor one (C1), one end of capacitor two (C2), one end of capacitor three (C3), the first pin of voltage stabilizing chip (U1) and the third pin of voltage stabilizing chip (U1) respectively and outputs +5V voltage, the other end of inductor one (L1) is connected with the fifth pin of power chip (U2) and the sixth pin of power chip (U2) respectively, the other end of capacitor one (C1) is grounded, the other end of capacitor two (C2) is grounded, the other end of capacitor three (C3) is grounded, the second pin of power chip (U2) is grounded, the second pin of voltage stabilizing chip (U1) is grounded, the fifth pin of voltage stabilizing chip (U1) is connected with one end of capacitor four (C4), one end of capacitor five (C5) and one end of capacitor six (C6) respectively and outputs +3.3V voltage, the other end of capacitor four (C4), the other end of capacitor five (C5) and the other end of capacitor six (C6) are merged and grounded together.

4. A squelch charger protection jack circuit according to claim 1, wherein: The 4th pin of the wiring terminal one (J1) is connected with 3.3V voltage, and the 1st pin of the wiring terminal one (J1) is grounded.

5. A squelch charger protection jack circuit according to claim 1, wherein: The model of the single-chip microcomputer (U4) is STC8H1K08-36I-QFN20.

6. A squelch charger protection jack circuit according to claim 1, wherein: The model of the relay one (K1) is 973-5VDC-SL-A.

7. A squelch charger protection jack circuit according to claim 1, wherein: The model of the control chip (U3) is BL0942.

8. A squelch charger protection jack circuit according to claim 3, wherein: The model of the power supply chip (U2) is BP8523D, and the model of the voltage stabilizing chip (U1) is ME6211C33M5G-N.

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