CN210222973U - Residual current type electric fire monitoring detector circuit - Google Patents
Residual current type electric fire monitoring detector circuit Download PDFInfo
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- CN210222973U CN210222973U CN201921492909.8U CN201921492909U CN210222973U CN 210222973 U CN210222973 U CN 210222973U CN 201921492909 U CN201921492909 U CN 201921492909U CN 210222973 U CN210222973 U CN 210222973U
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Abstract
The utility model relates to a fire control technical field, concretely relates to residual current formula electric fire control detector circuit, including master control circuit, communication circuit, power supply circuit, signal processing circuit, display circuit, master control circuit includes main control chip, first connector, second connector, and main control chip adopts TINY44A type MCU chip, and it has fourteen pins, and second, third pin connect a light-emitting unit respectively; the fourth pin, the eighth pin and the ninth pin are connected with a second connector; the fifth pin is connected with the display circuit through the first connector; the sixth pin and the seventh pin are connected with a communication circuit; the tenth pin and the eleventh pin are connected with the display circuit; the twelfth pin and the thirteenth pin are connected with a signal processing circuit. The utility model discloses a direct sampling mode of singlechip not only has higher interference killing feature, and the circuit material is drawn materials easily, and preparation low cost, components and parts are ripe stable to make the circuit operation reliable and stable.
Description
Technical Field
The utility model relates to a conflagration control technical field, concretely relates to residual current formula electric fire control detector circuit.
Background
A residual current type electric fire monitor is an intelligent one, when the current parameter in electric equipment is abnormal or suddenly changed, the residual current transformer of terminal probe uses the change of electromagnetic field induction principle to collect the information, and transmits it to monitor, after amplification, A/D conversion, CPU analyzes and judges the changed amplitude, and compares it with alarm set value, once it exceeds the set value, it sends out alarm signal, and also transmits it to monitor, and further identifies and judges by monitor, when it is confirmed that fire may happen, the monitor host sends out fire alarm signal, lights alarm indicator lamp, sends out alarm sound, and displays information such as fire alarm on LCD screen
However, the residual current type electrical fire monitoring detector in the prior art is generally realized based on an LTC1966 chip, and not only is the circuit manufacturing cost high, but also the operation is unstable, the overall reliability is poor, and the sensitivity is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a residual current formula electric fire control detector circuit, solve above technical problem.
The utility model provides a technical problem can adopt following technical scheme to realize:
a residual current type electric fire monitoring detector circuit comprises a main control circuit, a communication circuit, a power circuit, a signal processing circuit and a display circuit, wherein the main control circuit is connected with the communication circuit, the signal processing circuit and the display circuit;
the master control circuit comprises a master control chip, a first connector and a second connector, wherein the master control chip adopts a TINY44A type MCU chip and is provided with fourteen pins, and the connecting structure of each pin is set as follows:
the first pin is connected with the power circuit and then gets electricity;
the second pin and the third pin are respectively connected with a light-emitting unit;
the fourth pin, the eighth pin and the ninth pin are connected with the second connector and used for receiving an external programming instruction;
the fifth pin is connected with the first connector and is connected with the display circuit through the first connector;
the sixth pin and the seventh pin are connected with the communication circuit;
the tenth pin and the eleventh pin are connected with the display circuit;
the twelfth pin and the thirteenth pin are connected with the signal processing circuit;
the fourteenth pin is grounded.
Preferably, the first connector adopts two rows of six-pin connecting terminals, and the pin connecting structure is arranged as follows:
the first pin is connected with the output end of the voltage stabilizing unit of the communication circuit;
the second pin and the fifth pin are grounded;
the third pin is connected with the fifth pin of the main control chip;
the fourth pin is connected with an external programming device.
Preferably, the second connector is an ISP programmer connection terminal having six pins, and the connection structure of each pin is as follows:
the first pin is connected with an eighth pin of the main control chip;
the second pin is connected with the power circuit and then gets electricity;
the third pin is connected with the ninth pin of the main control chip;
the fourth pin is connected with the seventh pin of the main control chip;
the fifth pin is connected with the fourth pin of the main control chip;
the sixth pin is grounded.
The communication circuit comprises a third connector, a filter, a rectifying unit, a first amplifying unit and a second amplifying unit, wherein:
the third connector is connected with an external signal source;
the input end of the filter is connected with the third connector, and the output end of the filter is connected with the input end of the rectifying unit;
the output end of the rectifying unit is connected with the first amplifying unit and the second amplifying unit, and the positive end of the output end of the rectifying unit is connected with the first connector;
the output end of the first amplifying unit is connected with a seventh pin of the main control chip;
and the output end of the second amplifying unit is connected with a sixth pin of the main control chip.
The power supply circuit comprises a third amplification unit and a voltage stabilization unit, wherein the input end of the third amplification unit is connected with the first connector, the output end of the third amplification unit is connected with the input end of the voltage stabilization unit, and the output end of the voltage stabilization unit is connected with the main control chip, the second connector, the first amplification unit of the communication circuit and the signal processing circuit.
The signal processing circuit comprises a fourth connector, an anti-static unit, a fourth amplifying unit and a processing unit, wherein:
the fourth connector is connected with an external transformer;
the anti-static unit is connected with the fourth connector;
the input end of the processing unit is connected with the fourth connector and the fourth amplifying unit, and the output end of the processing unit is connected with the twelfth pin and the thirteenth pin of the main control chip;
the fourth amplifying circuit is connected with an eighth pin of the main control chip.
Preferably, the anti-static unit is an electrostatic diode, and two ends of the electrostatic diode are respectively connected to two terminals of the fourth connector.
The display circuit comprises a display module and a driving module, the display module is connected with the driving module, and the driving module is connected with the main control chip.
The display module adopts a nixie tube or an LCD display unit or an LED display unit.
Preferably, the display module adopts a four-digit nixie tube, which has twelve pins, including four control pins and eight segment pins,
the driving module adopts an HT1621B type liquid crystal display driving chip which is provided with forty-eight pins, and the pin connecting structures are arranged as follows:
the first pin to the eighth pin are respectively connected with eight segment pins of the display module;
the ninth pin, the eleventh pin and the twelfth pin are connected with the main control chip;
the thirteenth pin is grounded;
the sixteenth pin and the seventeenth pin are connected with the power circuit;
the twenty-first to twenty-fourth pins are connected with the four control pins of the display module.
Has the advantages that: due to the adoption of the technical scheme, the utility model discloses a singlechip direct sampling mode not only has higher interference killing feature, and circuit material is easy for drawing materials, and preparation low cost, components and parts are ripe stable to make the circuit operation reliable and stable.
Drawings
Fig. 1 is a schematic structural diagram of a main control circuit of the present invention;
fig. 2 is a schematic structural diagram of a communication circuit according to the present invention;
fig. 3 is a schematic structural diagram of the power circuit of the present invention;
fig. 4 is a schematic structural diagram of the signal processing circuit of the present invention;
fig. 5 is a schematic structural diagram of the display circuit of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.
Referring to fig. 1 to 5, a residual current type electrical fire monitoring detector circuit includes a main control circuit, a communication circuit, a power circuit, a signal processing circuit, and a display circuit. The main control circuit is connected with the communication circuit, the signal processing circuit and the display circuit. The output end of the power supply circuit is +3.3V voltage and is connected with the main control circuit, the communication circuit, the signal processing circuit and the display circuit.
As shown in fig. 1, the master control circuit includes a master control chip U1, a first connector J1, and a second connector J2. The master control chip U1 adopts a TINY44A type MCU chip, which has fourteen pins, and the connection structure of each pin is set as follows:
the first pin is connected with the +3.3V output end of the power supply circuit;
the second pin is connected with the first light-emitting unit LED1 through an eighteenth resistor R18, the third pin is connected with the second light-emitting unit LED2 through a thirteenth resistor R13, and the cathodes of the two light-emitting units are grounded;
the fourth eighth pin and the ninth pin are connected with the second connector J2, the fourth pin is also connected with the +3.3V output end of the power supply circuit through a seventh resistor R7, and the fourth pin is grounded through a ninth capacitor C9;
the fifth pin is connected to the first connector J1 through a fourteenth resistor R14 and to the display circuit through the first connector J1, and the fifth pin is connected to the +3.3V output of the power supply circuit through a tenth resistor R10;
the sixth pin and the seventh pin are connected with a communication circuit;
the tenth pin and the eleventh pin are connected with the display circuit;
the twelfth pin and the thirteenth pin are connected with a signal processing circuit;
the fourteenth pin is grounded and is connected to the first pin through a fifth capacitor C5.
As shown in fig. 1, in some preferred embodiments, the first connector J1 employs two rows of six-pin connection terminals, and the pin connection structure is configured as follows:
the first pin is connected with an output end S + + end of a voltage stabilizing unit of the communication circuit;
the second pin and the fifth pin are grounded;
the third pin is connected with a fifth pin of the main control chip U1;
the fourth pin is connected to the WR write terminal of the external programming device.
In some preferred embodiments, as shown in FIG. 1, the second connector J2 is a six pin ISP programmer connection terminal with the following pin connection configuration:
the first pin is connected with an eighth pin of the main control chip U1;
the second pin is connected with the +3.3V output end of the power supply circuit;
the third pin is connected with the ninth pin of the main control chip U1;
the fourth pin is connected with a seventh pin of the main control chip U1;
the fifth pin is connected with the fourth pin of the main control chip U1;
the sixth pin is grounded.
As shown in fig. 2, in some embodiments, the communication circuit includes a third connector J3, a filter T1, a rectifying unit, a first amplifying unit, and a second amplifying unit, wherein:
the third connector J3 is connected to an external signal source, specifically, a first pin of the third connector J3 is connected to an anode S + terminal of the external signal source, and a second pin is connected to a cathode S-terminal of the external signal source;
the positive input and the negative input of the filter T1 are respectively connected with the first pin and the second pin of the third connector J3, and the positive output and the negative output are respectively connected with the positive input and the negative input of the rectifying unit, and the input end of the filter T1 is also connected with the transient voltage suppression diode D8;
the output end of the rectifying unit is connected with the first amplifying unit and the second amplifying unit, the positive end of the output end of the rectifying unit is connected with the first pin of the first connector J1, the output end generates an S + + signal, and the positive output end and the negative output end of the rectifying unit are also connected with a nineteenth resistor R19;
the first amplifying unit comprises a third triode Q3, the base of the triode Q3 is connected with the anode output end of the rectifying unit after being connected with an eleventh resistor R11, an eighth resistor R8 and a sixth capacitor C6 in series, the base of the triode Q3 is also connected with the cathode output end of the rectifying unit through a fifteenth resistor R15, in addition, one end of the resistor R8, which is connected with the resistor R11, passes through a tenth capacitor C10, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is connected with the seventh pin of the main control chip U1, and the collector is also connected with the +3.3V output end of the power supply circuit through a ninth resistor R9;
the second amplifying unit comprises a second triode Q2 and a fourth triode Q4, the triode Q2 is a PNP type triode, the triode Q4 is an NPN type triode, wherein:
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q4, the emitter electrode is connected with the positive electrode output end of the rectifying unit through a twelfth resistor R12, and the collector electrode is grounded through a twenty-first resistor R21;
the emitter of the triode Q4 is grounded through a resistor R21, the base is connected to the sixth pin of the main control chip U1 through a sixteenth resistor R16, and the base is also grounded through a seventeenth resistor R17.
As shown in fig. 2, in some preferred embodiments, the rectifying unit employs a rectifying bridge composed of four 4148 type diodes, including diodes D3, D4, D5, and D6. The positive electrode input end of the rectifier bridge is connected with the first pin of the third connector J3 through a nineteenth resistor R39, the negative electrode input end of the rectifier bridge is connected with the second pin of the third connector J3 through a fortieth resistor R40, the positive electrode of the rectifier bridge outputs S + + signals, and the negative electrode of the rectifier bridge outputs ground.
As shown in fig. 3, the power circuit includes a third amplifying unit and a voltage stabilizing unit U2, an input terminal of the third amplifying unit is connected to the first pin of the first connector J1, an output terminal of the third amplifying unit is connected to the input terminal of the voltage stabilizing unit U2, and an output terminal of the voltage stabilizing unit U2 is connected to the main control chip U1, the second connector J2, the first amplifying unit of the communication circuit, and the signal processing circuit.
As shown in fig. 3, in some preferred embodiments, the first amplifying circuit includes a first transistor Q1, a collector of which is connected to the first pin of the first connector J1 through a third resistor R3, a base of which is connected to ground through a tvs diode D7, and an emitter of which is connected to the input terminal of the regulator unit U2 through a fourth resistor R4. In addition, the base of the triode Q1 is grounded through a fourth capacitor C4, and the collector is connected with the base through a sixth resistor R6;
the voltage stabilizing unit U2 is a HT7533-2 type voltage stabilizing chip, the second pin of which is an input terminal, the second pin is connected to the resistor R4, and the second pin is grounded through the seventh capacitor C7, the first pin of the voltage stabilizing unit U2 is grounded, the third pin outputs +3.3V, and the third pin is grounded through the eighth capacitor C8.
As shown in fig. 4, the signal processing circuit includes a fourth connector J4, an anti-static unit D14, a fourth amplifying unit, and a processing unit, wherein:
the fourth connector J4 is connected with an internal wiring terminal of an external transformer;
the antistatic unit D14 is connected with the fourth connector J4;
the input end of the processing unit is connected with the fourth connector J4 and the fourth amplifying unit, and the output end of the processing unit is connected with the twelfth pin and the thirteenth pin of the main control chip U1;
the fourth amplifying circuit is connected with the eighth pin of the main control chip U1.
The fourth amplifying unit comprises a field effect transistor Q5, the source electrode of the field effect transistor Q5 is connected with the +3.3V output of the power circuit, the grid electrode of the field effect transistor Q5 is connected with the eighth pin of the main control chip U1 through a thirty-fourth resistor R34, and the drain electrode of the field effect transistor Q5 is connected with the input of the processing unit through a thirty-third resistor R33;
the processing unit comprises a first diode D1, a second diode D2, a first resistor R1, a second resistor R2, a second capacitor C2, a third capacitor C3, a fifth resistor R5 and a thirty-sixth resistor R36, a first pin of a fourth connector J4 is connected with the anode of the first diode D1 through a seventeenth resistor R37, and a second pin of a fourth connector J4 is connected with the cathode of the first diode D1 through a thirty-eighth resistor R38; the anode of the first diode D1 is connected with the cathode of the second diode D2, and the cathode of the first diode D1 is connected with the anode of the second diode D2; the cathode of the second diode D2 is connected with the thirteenth pin of the main control chip U1 through a resistor R2, and the anode is connected with the twelfth pin of the main control chip U1 through a resistor R5; one end of the resistor R2 is grounded through the first resistor R1, the other end is grounded through the second capacitor C2, one end of the resistor R5 is grounded through the thirty-sixth resistor R36, and the other end is grounded through the third capacitor C3.
As shown in fig. 4, in some preferred embodiments, the static electricity preventing unit D14 is an electrostatic diode, model number PESD3V3L2, which has three pins, a first pin is connected to the second pin of the fourth connector J4, a second pin is connected to the first pin of the fourth connector J4, and a third pin is grounded.
As shown in fig. 5, the display circuit includes a display module S1 and a driving module U3, the display module S1 is connected to the driving module U3, and the driving module U3 is connected to the main control chip U1. The display module S1 may employ a nixie tube or an LCD display unit or an LED display unit.
As shown in fig. 5, in some preferred embodiments, the display module S1 employs a four-bit nixie tube having twelve pins, including four control pins and eight segment pins, the control pins include first pin to fourth pin, the segment pins include fifth pin to twelfth pin, the driving module U3 employs a HT1621B type lcd driving chip having forty-eight pins, and the connection structure of the pins is set as follows:
a twelfth pin of the first pin connection module S1, an eighth pin of the second pin connection module S1, a seventh pin of the third pin connection module S1, a tenth pin of the fourth pin connection module S1, an eleventh pin of the fifth pin connection module S1, a ninth pin of the sixth pin connection module S1, a sixth pin of the seventh pin connection module S1, and a fifth pin of the eighth pin connection module S1;
the ninth pin is connected with the eleventh pin of the main control chip U1;
the eleventh pin is connected with the tenth pin of the main control chip U1;
the twelfth pin is connected with the ninth pin of the main control chip U1;
the thirteenth pin is grounded;
the sixteenth pin is connected with the +3.3V output of the power supply circuit through a twentieth resistor R20, and one end of the resistor R20 is grounded through a first capacitor C1;
the seventeenth pin is connected with the +3.3V output of the power circuit;
the twenty-first pin is connected with the first pin of the module S1, the twenty-second pin is connected with the second pin of the module S1, the twenty-third pin is connected with the third pin of the module S1, and the twenty-fourth pin is connected with the fourth pin of the module S1.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A residual current type electric fire monitoring detector circuit is characterized by comprising a main control circuit, a communication circuit, a power circuit, a signal processing circuit and a display circuit, wherein the main control circuit is connected with the communication circuit, the signal processing circuit and the display circuit;
the master control circuit comprises a master control chip, a first connector and a second connector, wherein the master control chip adopts a TINY44A type MCU chip and is provided with fourteen pins, and the connecting structure of each pin is set as follows:
the first pin is connected with the power circuit and then gets electricity;
the second pin and the third pin are respectively connected with a light-emitting unit;
the fourth pin, the eighth pin and the ninth pin are connected with the second connector and used for receiving an external programming instruction;
the fifth pin is connected with the first connector and is connected with the display circuit through the first connector;
the sixth pin and the seventh pin are connected with the communication circuit;
the tenth pin and the eleventh pin are connected with the display circuit;
the twelfth pin and the thirteenth pin are connected with the signal processing circuit;
the fourteenth pin is grounded.
2. A residual current type electrical fire monitoring detector circuit according to claim 1, wherein said first connector employs two rows of six-pin connection terminals, the pin connection configuration of which is arranged as follows:
the first pin is connected with the output end of the voltage stabilizing unit of the communication circuit;
the second pin and the fifth pin are grounded;
the third pin is connected with the fifth pin of the main control chip;
the fourth pin is connected with an external programming device.
3. A residual current type electrical fire monitoring detector circuit according to claim 1, wherein said second connector is a six pin ISP programmer connection terminal, the connection configuration of the respective pins being arranged as follows:
the first pin is connected with an eighth pin of the main control chip;
the second pin is connected with the power circuit and then gets electricity;
the third pin is connected with the ninth pin of the main control chip;
the fourth pin is connected with the seventh pin of the main control chip;
the fifth pin is connected with the fourth pin of the main control chip;
the sixth pin is grounded.
4. A residual current type electrical fire monitoring detector circuit according to claim 1, 2 or 3, wherein the communication circuit comprises a third connector, a filter, a rectifying unit, a first amplifying unit, a second amplifying unit, wherein:
the third connector is connected with an external signal source;
the input end of the filter is connected with the third connector, and the output end of the filter is connected with the input end of the rectifying unit;
the output end of the rectifying unit is connected with the first amplifying unit and the second amplifying unit, and the positive end of the output end of the rectifying unit is connected with the first connector;
the output end of the first amplifying unit is connected with a seventh pin of the main control chip;
and the output end of the second amplifying unit is connected with a sixth pin of the main control chip.
5. The residual current type electrical fire monitoring detector circuit according to claim 4, wherein the power circuit comprises a third amplifying unit and a voltage stabilizing unit, an input end of the third amplifying unit is connected with the first connector, an output end of the third amplifying unit is connected with an input end of the voltage stabilizing unit, and an output end of the voltage stabilizing unit is connected with the main control chip, the second connector, the first amplifying unit of the communication circuit and the signal processing circuit.
6. A residual current type electrical fire monitoring detector circuit according to claim 5, wherein the signal processing circuit comprises a fourth connector, an anti-static unit, a fourth amplifying unit and a processing unit, wherein:
the fourth connector is connected with an external transformer;
the anti-static unit is connected with the fourth connector;
the input end of the processing unit is connected with the fourth connector and the fourth amplifying unit, and the output end of the processing unit is connected with the twelfth pin and the thirteenth pin of the main control chip;
the fourth amplifying circuit is connected with an eighth pin of the main control chip.
7. The residual current type electrical fire monitoring detector circuit according to claim 6, wherein the static electricity preventing unit is an electrostatic diode, and two ends of the electrostatic diode are respectively connected to two terminals of the fourth connector.
8. The residual current type electrical fire monitoring detector circuit according to claim 7, wherein the display circuit comprises a display module and a driving module, the display module is connected with the driving module, and the driving module is connected with the main control chip.
9. The residual current type electrical fire monitoring detector circuit according to claim 8, wherein the display module is a nixie tube or an LCD display unit or an LED display unit.
10. The circuit of claim 9, wherein the display module is a four-digit nixie tube having twelve pins including four control pins and eight segment pins, the driving module is a HT1621B type lcd driving chip having forty-eight pins, and the connection structure of the pins is as follows:
the first pin to the eighth pin are respectively connected with eight segment pins of the display module;
the ninth pin, the eleventh pin and the twelfth pin are connected with the main control chip;
the thirteenth pin is grounded;
the sixteenth pin and the seventeenth pin are connected with the power circuit;
the twenty-first to twenty-fourth pins are connected with the four control pins of the display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921492909.8U CN210222973U (en) | 2019-09-10 | 2019-09-10 | Residual current type electric fire monitoring detector circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921492909.8U CN210222973U (en) | 2019-09-10 | 2019-09-10 | Residual current type electric fire monitoring detector circuit |
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| CN210222973U true CN210222973U (en) | 2020-03-31 |
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| CN201921492909.8U Active CN210222973U (en) | 2019-09-10 | 2019-09-10 | Residual current type electric fire monitoring detector circuit |
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