CN212647608U - Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system - Google Patents
Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system Download PDFInfo
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- CN212647608U CN212647608U CN202021422352.3U CN202021422352U CN212647608U CN 212647608 U CN212647608 U CN 212647608U CN 202021422352 U CN202021422352 U CN 202021422352U CN 212647608 U CN212647608 U CN 212647608U
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Abstract
The application relates to a regional explosion-proof audible alarm circuit, a regional explosion-proof audible alarm and a system; the regional explosion-proof sound alarm circuit comprises a main control chip, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and a sound drive circuit; the main control chip is respectively connected with the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the light alarm output circuit and the sound drive circuit, so that the safety performance of the regional explosion-proof sound alarm circuit can be improved, the regional explosion-proof sound alarm can be controlled under the conditions that the scene is electrified and the cover is not opened, and the operation is more flexible and more convenient.
Description
Technical Field
The application relates to the technical field of industrial field explosive gas and toxic and harmful gas concentration alarm, in particular to a regional explosion-proof sound alarm circuit, a regional explosion-proof sound alarm and a system.
Background
In industrial fields such as large-scale petrochemical industry, dangerous situations such as explosive gas and toxic and harmful gas leakage exist, and when the dangerous situations occur, on-site workers need to be alarmed so as to evacuate personnel and investigate risks in time. At present, generally, an alarm is installed on an industrial field such as a large-scale petrochemical industry and the like to perform safety alarm, however, in the implementation process, the inventor finds that at least the following problems exist in the traditional technology: the traditional alarm has low safety and is complicated to operate and control.
SUMMERY OF THE UTILITY MODEL
On the basis, the problems that the traditional alarm is complex in setting operation and high in difficulty and installation and arrangement cost are needed, and the regional explosion-proof sound alarm circuit, the regional explosion-proof sound alarm and the system are provided.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a regional explosion-proof audible alarm circuit, which includes a main control chip, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit, and an audible driving circuit;
the main control chip is respectively connected with the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the light alarm output circuit and the sound drive circuit.
In one embodiment, the signal transmission circuit comprises an SP3485 chip, a transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a fuse F1, a fuse F2, a bidirectional TVS tube D1, and a bidirectional TVS tube D2;
an emitter of the triode Q1 is externally connected with a power supply, a base is connected with one end of the resistor R1, and a collector is connected with one end of the resistor R2 and the No. 2 pin and the No. 3 pin of the SP3485 chip; the other end of the resistor R1 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R2 is grounded; the 1 st pin and the 4 th pin of the SP3485 chip are connected with the main control chip;
one end of the capacitor C1 is connected with the 8 th pin of the SP3485 chip, and the other end is connected with one end of the resistor R3 and grounded; the other end of the resistor R3 is connected with the 7 th pin of the SP3485 chip;
one end of the resistor R4 is connected with the 6 th pin of the SP3485 chip, and the other end is externally connected with a power supply;
one end of the fuse F1 is connected with the 6 th pin of the SP3485 chip, and the other end is grounded through a bidirectional TVS tube D1; the other end of the fuse F1 is used as an external connecting terminal;
one end of the fuse F2 is connected with the 7 th pin of the SP3485 chip, and the other end is grounded through a bidirectional TVS tube D2; the other end of the fuse F2 is used as an external connection terminal.
In one embodiment, the infrared receiving circuit comprises an infrared receiving tube U1, a capacitor C2 and a resistor R5;
the first end of the infrared receiving tube U1 is connected with one end of the resistor R5, the second end is connected with the main control chip, and the third end is connected with the ground;
the other end of the resistor R5 is connected with one end of the capacitor C2 and is externally connected with a power supply; the other terminal of the capacitor C2 is connected to ground.
In one embodiment, the infrared receiving tube U1 is a HS0038 type infrared receiving tube U1.
In one embodiment, the signal processing circuit comprises a fuse F3, a fuse F4, a piezoresistor RV1, a piezoresistor RV2, a bidirectional TVS tube D3, a bidirectional TVS tube D4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a photocoupler U2;
one end of the fuse F3 is connected with one end of the piezoresistor RV1 and the bidirectional TVS tube D3, and the other end of the fuse F3 is used as an external wiring terminal; the other ends of the piezoresistor RV1 and the bidirectional TVS tube D3 are grounded;
one end of the fuse F4 is connected with one end of the piezoresistor RV2 and the bidirectional TVS tube D4, and the other end of the fuse F4 is used as an external wiring terminal; the other ends of the piezoresistor RV2 and the bidirectional TVS tube D4 are grounded;
one end of the resistor R6 is connected with one end of the fuse F3, and the other end is externally connected with a power supply; one end of the resistor R7 is connected with one end of the fuse F3, and the other end is connected with one end of the fuse F4 and one end of the resistor R8; the other end of the resistor R8 is connected with the first end of a photoelectric coupler U2;
the second end of the photoelectric coupler U2 is connected with the other end of the bidirectional TVS tube D4, the third end is connected with a resistor R9 and a resistor R10, and the fourth end is externally connected with a power supply; the resistor R9 is connected with the main control chip; the other end of the resistor R10 is connected to ground.
In one embodiment, the sound driving circuit comprises a TDA7498 chip, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R11, a resistor R12, a resistor R13, an inductor L1, an inductor L2 and a digital potentiometer;
one end of the capacitor C2 and one end of the capacitor C3 are connected with a 32 nd pin of the TDA7498 chip; the other end of the capacitor C2 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C3 is grounded; the 3 rd pin, the 5 th pin and the 8 th pin of the digital potentiometer U3 are connected with the main control chip;
one end of the capacitor C4 and one end of the capacitor C5 are connected with a 33 rd pin of the TDA7498 chip; the other end of the capacitor C4 is grounded; the other end of the capacitor C5 is grounded;
one end of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 is connected with the 4 th pin and the 5 th pin of the TDA7498 chip and is grounded; the other ends of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 are connected with a pin 6 and a pin 7 of the TDA7498 chip and are externally connected with a power supply;
one end of the capacitor C11 is connected with the 8 th pin and the 9 th pin of the TDA7498 chip, and the other end is connected with one end of the resistor R11; the other end of the resistor R11 is connected with the No. 2 pin and the No. 3 pin of the TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R11, and the other end is connected with one end of the capacitor C12; one end of the inductor L2 is connected with one end of the capacitor C11, and the other end is connected with the other end of the capacitor C12;
one end of the capacitor C13 is connected with the other end of the inductor L1, the other end of the capacitor C13 is connected with the other end of the inductor L2 through the capacitor C14, and the other end of the capacitor C13 is grounded;
one end of the resistor R12 is connected with the other end of the inductor L1, and the other end of the resistor R12 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the capacitor C16; the other end of the capacitor C16 is connected with one end of the resistor R13; the other end of the resistor R13 is connected with the other end of the inductor L2; the capacitor C15 is grounded; one end of the resistor R12 and the other end of the resistor R13 are used for connecting a loudspeaker.
In one embodiment, the light alarm output circuit comprises a light alarm control circuit and a light emitting circuit; one end of the light alarm control circuit is connected with the main control chip, and the other end of the light alarm control circuit is connected with the light-emitting circuit.
In one embodiment, the light alarm control circuit comprises a resistor R14, a resistor R15, a capacitor C17 and a triode Q2; one end of the resistor R14 is connected with the main control chip, and the other end is connected with one end of the resistor R15 and one end of the capacitor C17; the other ends of the resistor R15 and the capacitor C17 are grounded; the base of the triode Q2 is connected with the other end of the resistor R14, the collector is connected with the light-emitting circuit, and the emitter is grounded.
On the other hand, the embodiment of the application also provides a regional explosion-proof sound alarm, which comprises the regional explosion-proof sound alarm circuit and an alarm shell;
the regional explosion-proof sound alarm circuit is arranged in the alarm shell.
In another aspect, an embodiment of the present application further provides an area explosion-proof sound alarm system, including a plurality of area explosion-proof sound alarms described above; the system also comprises a server, background equipment and a plurality of associated equipment;
the regional explosion-proof audible alarms are connected with the associated equipment in a one-to-one correspondence manner; the explosion-proof audible alarms in all areas are respectively connected with the server; the server is connected with the background equipment; the related equipment is used for sending alarm signals to the regional explosion-proof audible alarm.
One of the above technical solutions has the following advantages and beneficial effects:
the regional explosion-proof sound alarm circuit provided by each embodiment of the application comprises a main control chip, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and a sound driving circuit; the main control chip is respectively connected with the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the light alarm output circuit and the sound drive circuit, so that the safety performance of the regional explosion-proof sound alarm circuit can be improved, the regional explosion-proof sound alarm can be controlled under the conditions that the scene is electrified and the cover is not opened, and the operation is more flexible and more convenient.
Drawings
FIG. 1 is a schematic diagram of a regional explosion-proof audible alarm circuit in one embodiment;
FIG. 2 is a circuit schematic of a signal transmission circuit in one embodiment;
FIG. 3 is a schematic circuit diagram of an embodiment of an infrared receiving circuit;
FIG. 4 is a circuit schematic of a signal processing circuit in one embodiment;
FIG. 5 is a circuit schematic of an audio driver circuit in one embodiment;
FIG. 6 is a schematic electrical diagram of an optical alarm control circuit in one embodiment;
FIG. 7 is a circuit schematic of a lighting circuit in one embodiment;
fig. 8 is a schematic structural diagram of a regional explosion-proof audible alarm in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application 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 will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "disposed," "one end," "the other end," and the like as used herein are for illustrative purposes only.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the technical problems of complex operation and high installation and arrangement cost of the traditional alarm, in one embodiment, as shown in fig. 1, a regional explosion-proof audible alarm circuit is provided, which comprises a main control chip 11, a signal transmission circuit 13, an infrared receiving circuit 15, a signal processing circuit 17, an optical alarm output circuit 19 and an audible driving circuit 21;
the main control chip 11 is connected to the signal transmission circuit 13, the infrared receiving circuit 15, the signal processing circuit 17, the light alarm output circuit 19 and the sound driving circuit 21, respectively.
It should be noted that the main control chip is a control center of the regional explosion-proof audible alarm circuit, and in one example, the main control chip is an STM32RCT6 type chip.
The signal transmission circuit is used for realizing field wired data transmission, for example, receiving wired signals through the signal transmission circuit, realizing wired setting of a working mode, sending a current working state, receiving an alarm signal and the like. In one example, as shown in fig. 2, the signal transmission circuit includes an SP3485 chip, a transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a fuse F1, a fuse F2, a bidirectional TVS (Transient Voltage super) transistor D1, and a bidirectional TVS transistor D2;
an emitter of the triode Q1 is externally connected with a power supply, a base is connected with one end of the resistor R1, and a collector is connected with one end of the resistor R2 and the No. 2 pin and the No. 3 pin of the SP3485 chip; the other end of the resistor R1 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R2 is grounded; the 1 st pin and the 4 th pin of the SP3485 chip are connected with the main control chip;
one end of the capacitor C1 is connected with the 8 th pin of the SP3485 chip, and the other end is connected with one end of the resistor R3 and grounded; the other end of the resistor R3 is connected with the 7 th pin of the SP3485 chip;
one end of the resistor R4 is connected with the 6 th pin of the SP3485 chip, and the other end is externally connected with a power supply;
one end of the fuse F1 is connected with the 6 th pin of the SP3485 chip, and the other end is grounded through a bidirectional TVS tube D1; the other end of the fuse F1 is used as an external connection terminal (J4-2 in FIG. 2);
one end of the fuse F2 is connected with the 7 th pin of the SP3485 chip, and the other end is grounded through a bidirectional TVS tube D2; the other end of the fuse F2 is used as an external connection terminal (J4-1 in fig. 2).
The infrared receiving circuit is used for receiving infrared carrier signals and carrying out carrier decoding on the infrared carrier signals, the control over the explosion-proof sound alarm circuit in the application domain is achieved, the effects of live working mode setting, uncovering and working mode flexible setting are achieved, the infrared setting operation is utilized, live uncovering operation is achieved, the setting operation is simplified, the time cost of workers is saved, and the error probability is reduced. In one example, as shown in fig. 3, the infrared receiving circuit includes an infrared receiving tube U1, a capacitor C2, and a resistor R5;
the first end of the infrared receiving tube U1 is connected with one end of the resistor R5, the second end is connected with the main control chip, and the third end is connected with the ground;
the other end of the resistor R5 is connected with one end of the capacitor C2 and is externally connected with a power supply; the other terminal of the capacitor C2 is connected to ground.
Further, in one example, the infrared receiving tube U1 is an HS0038 type infrared receiving tube U1.
The signal processing circuit controls the alarm to alarm when detecting that an alarm signal is input, and in one example, as shown in fig. 4, the signal processing circuit comprises a fuse F3, a fuse F4, a piezoresistor RV1, a piezoresistor RV2, a bidirectional TVS tube D3, a bidirectional TVS tube D4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a photocoupler U2;
one end of the fuse F3 is connected with one end of the voltage dependent resistor RV1 and the bidirectional TVS tube D3, and the other end is used as an external connecting terminal (S1 in FIG. 4); the other ends of the piezoresistor RV1 and the bidirectional TVS tube D3 are grounded;
one end of the fuse F4 is connected with one end of the voltage dependent resistor RV2 and the bidirectional TVS tube D4, and the other end is used as an external connecting terminal (S2 in FIG. 4); the other ends of the piezoresistor RV2 and the bidirectional TVS tube D4 are grounded;
one end of the resistor R6 is connected with one end of the fuse F3, and the other end is externally connected with a power supply; one end of the resistor R7 is connected with one end of the fuse F3, and the other end is connected with one end of the fuse F4 and one end of the resistor R8; the other end of the resistor R8 is connected with the first end of a photoelectric coupler U2;
the second end of the photoelectric coupler U2 is connected with the other end of the bidirectional TVS tube D4, the third end is connected with a resistor R9 and a resistor R10, and the fourth end is externally connected with a power supply; the resistor R9 is connected with the main control chip; the other end of the resistor R10 is connected to ground.
It should be noted that the fuse F3, the fuse F4, the varistor RV1, the varistor RV2, the bidirectional TVS tube D3, and the bidirectional TVS tube D4 form a surge protection circuit. In one example, the opto-coupler U2 is a PC817X1CSP9F type opto-coupler. When the signal processing circuit detects that an alarm signal is input, the fuse F3 and the fuse F4 are in short circuit, and the main control chip controls the loudspeaker and the optical alarm output circuit to be electrified for alarming.
The sound driving circuit is a loudspeaker driving circuit of the regional explosion-proof sound alarm, and the sound driving circuit plays a corresponding sound alarm through driving a loudspeaker according to a signal sent by the main control chip, for example, the dangerous situation is particularly urgent, and the played sound alarm has high frequency and high tone; the dangerous situation is generally urgent, and the played sound alarm has low frequency and low tone; evacuation voice guidance can also be played.
In one example, as shown in fig. 5, the sound driving circuit includes a TDA7498 chip, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R11, a resistor R12, a resistor R13, an inductor L1, an inductor L2, and a digital potentiometer;
one end of the capacitor C2 and one end of the capacitor C3 are connected with a 32 nd pin of the TDA7498 chip; the other end of the capacitor C2 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C3 is grounded; the 3 rd pin, the 5 th pin and the 8 th pin of the digital potentiometer U3 are connected with the main control chip;
one end of the capacitor C4 and one end of the capacitor C5 are connected with a 33 rd pin of the TDA7498 chip; the other end of the capacitor C4 is grounded; the other end of the capacitor C5 is grounded;
one end of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 is connected with the 4 th pin and the 5 th pin of the TDA7498 chip and is grounded; the other ends of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 are connected with a pin 6 and a pin 7 of the TDA7498 chip and are externally connected with a power supply;
one end of the capacitor C11 is connected with the 8 th pin and the 9 th pin of the TDA7498 chip, and the other end is connected with one end of the resistor R11; the other end of the resistor R11 is connected with the No. 2 pin and the No. 3 pin of the TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R11, and the other end is connected with one end of the capacitor C12; one end of the inductor L2 is connected with one end of the capacitor C11, and the other end is connected with the other end of the capacitor C12;
one end of the capacitor C13 is connected with the other end of the inductor L1, the other end of the capacitor C13 is connected with the other end of the inductor L2 through the capacitor C14, and the other end of the capacitor C13 is grounded;
one end of the resistor R12 is connected with the other end of the inductor L1, and the other end of the resistor R12 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the capacitor C16; the other end of the capacitor C16 is connected with one end of the resistor R13; the other end of the resistor R13 is connected with the other end of the inductor L2; the capacitor C15 is grounded; one end of the resistor R12 and the other end of the resistor R13 are used for connecting a loudspeaker.
The light alarm output circuit is used for outputting light alarms, and the light alarms can emit light effects of various modes under the control of the main control chip, such as a flashing mode light effect and a rotating mode light effect. It is also possible to emit light effects of different colours corresponding to different alarms, for example, in one example the light alarm output circuit comprises light effects that emit two colours.
In one example, the light alarm output circuit includes a light alarm control circuit and a light emitting circuit; one end of the light alarm control circuit is connected with the main control chip, and the other end of the light alarm control circuit is connected with the light-emitting circuit. In one example, there are 6 sets of optical alarm output circuits in the present regional explosion-proof audible alarm circuit. In one example, as shown in fig. 6, the light alarm control circuit includes a resistor R14, a resistor R15, a capacitor C17, and a transistor Q2; one end of the resistor R14 is connected with the main control chip, and the other end is connected with one end of the resistor R15 and one end of the capacitor C17; the other ends of the resistor R15 and the capacitor C17 are grounded; the base of the triode Q2 is connected with the other end of the resistor R14, the collector is connected with the light-emitting circuit, and the emitter is grounded. In one example, as shown in fig. 7, the light emitting circuit includes a plurality of light emitting diodes VD, a resistor R16, and a resistor R17; one end of the resistor R16 and one end of the resistor R17 are connected with the collector of the triode Q2; the other end of the resistor R16 and the other end of the resistor R17 are connected in series with a plurality of light-emitting diodes VD; any two light emitting diodes VD are used as output ends.
In each embodiment of the regional explosion-proof sound alarm circuit, the regional explosion-proof sound alarm circuit comprises a main control chip, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and a sound drive circuit; the main control chip is respectively connected with the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the light alarm output circuit and the sound drive circuit, and can utilize infrared rays to carry out setting operation, so that the field electrified uncovering-free operation is realized, the setting operation is simplified, the time cost of workers is saved, and the error probability is reduced.
In one embodiment, the invention further provides a regional explosion-proof audible alarm, which comprises the regional explosion-proof audible alarm circuit in each embodiment of the regional explosion-proof audible alarm circuit, and an alarm shell;
the regional explosion-proof sound alarm circuit is arranged in the alarm shell.
It should be noted that the circuit of the regional explosion-proof audible alarm in this embodiment is the same as the circuit of the regional explosion-proof audible alarm described in the embodiments of the regional explosion-proof audible alarm circuit of this application, and please refer to the embodiments of the regional explosion-proof audible alarm circuit of this application in detail, which is not described herein again.
In one embodiment, as shown in fig. 8, there is also provided a regional explosion-proof audible alarm system, comprising a plurality of the above-mentioned regional explosion-proof audible alarms 101; further comprising a server 103, a backend device 105 and a plurality of associated devices 107;
the regional explosion-proof audible alarms 101 are connected with the associated equipment 107 in a one-to-one correspondence manner; the explosion-proof audible alarm 101 of each area is respectively connected with a server 103; the server 103 is connected with the background equipment 105; the association device 107 is a device for sending an alarm signal to the area explosion-proof audible alarm 101.
It should be noted that the associated device may be a detector, a controller, an emergency alarm, an emergency call button, or any device capable of providing an alarm signal in accordance with electrical characteristics, and when the associated device detects that the hazardous gas exceeds a safety limit, the associated device generates an alarm signal and transmits the alarm signal to the regional explosion-proof audible alarm in a wired manner.
The regional explosion-proof sound alarm also can be connected with background equipment through a server, the background equipment can directly transmit voice signals, control signals and the like to the regional explosion-proof sound alarm through the server, and in addition, the regional explosion-proof sound alarm can also feed back the current running state, the received alarm signals transmitted by the related equipment and the like to the background equipment through the server, so that the background equipment can track and record the regional explosion-proof sound alarm.
In each embodiment of the regional explosion-proof sound alarm system, the regional explosion-proof sound alarm system can rapidly respond to dangerous conditions and alarm in time, and the safety level of an industrial field is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A regional explosion-proof sound alarm circuit is characterized by comprising a main control chip, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and a sound drive circuit;
the main control chip is respectively connected with the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the light alarm output circuit and the sound drive circuit.
2. The regional explosion-proof audible alarm circuit as claimed in claim 1, wherein the signal transmission circuit comprises an SP3485 chip, a transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a fuse F1, a fuse F2, a bidirectional TVS tube D1 and a bidirectional TVS tube D2;
an emitter of the triode Q1 is externally connected with a power supply, a base is connected with one end of the resistor R1, and a collector is connected with one end of the resistor R2 and the No. 2 pin and the No. 3 pin of the SP3485 chip; the other end of the resistor R1 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R2 is grounded; the 1 st pin and the 4 th pin of the SP3485 chip are connected with the main control chip;
one end of the capacitor C1 is connected with the 8 th pin of the SP3485 chip, and the other end of the capacitor C1 is connected with one end of the resistor R3 and grounded; the other end of the resistor R3 is connected with the 7 th pin of the SP3485 chip;
one end of the resistor R4 is connected with the 6 th pin of the SP3485 chip, and the other end of the resistor R4 is externally connected with a power supply;
one end of the fuse F1 is connected to the 6 th pin of the SP3485 chip, and the other end is grounded through the bidirectional TVS tube D1; the other end of the fuse F1 is used as an external connecting terminal;
one end of the fuse F2 is connected to the 7 th pin of the SP3485 chip, and the other end is grounded through the bidirectional TVS tube D2; the other end of the fuse F2 is used as an external connection terminal.
3. The area explosion-proof audible alarm circuit according to claim 1, characterized in that the infrared receiving circuit comprises an infrared receiving tube U1, a capacitor C2 and a resistor R5;
the first end of the infrared receiving tube U1 is connected with one end of the resistor R5, the second end of the infrared receiving tube U1 is connected with the main control chip, and the third end of the infrared receiving tube U1 is connected with the ground;
the other end of the resistor R5 is connected with one end of the capacitor C2 and is externally connected with a power supply; the other end of the capacitor C2 is grounded.
4. The alarm circuit of claim 3, wherein the infrared receiving tube U1 is HS0038 type U1.
5. The regional explosion-proof audible alarm circuit as claimed in claim 1, wherein the signal processing circuit comprises a fuse F3, a fuse F4, a piezoresistor RV1, a piezoresistor RV2, a bidirectional TVS tube D3, a bidirectional TVS tube D4, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10 and a photocoupler U2;
one end of the fuse F3 is connected with one end of the piezoresistor RV1 and one end of the bidirectional TVS tube D3, and the other end of the fuse F3 is used as an external wiring terminal; the other ends of the piezoresistor RV1 and the bidirectional TVS tube D3 are grounded;
one end of the fuse F4 is connected with one end of the piezoresistor RV2 and one end of the bidirectional TVS tube D4, and the other end of the fuse F4 is used as an external wiring terminal; the other ends of the piezoresistor RV2 and the bidirectional TVS tube D4 are grounded;
one end of the resistor R6 is connected with one end of the fuse F3, and the other end of the resistor R6 is externally connected with a power supply; one end of the resistor R7 is connected with one end of the fuse F3, and the other end is connected with one end of the fuse F4 and one end of the resistor R8; the other end of the resistor R8 is connected with the first end of the photoelectric coupler U2;
the second end of the photoelectric coupler U2 is connected with the other end of the bidirectional TVS tube D4, the third end is connected with the resistor R9 and the resistor R10, and the fourth end is externally connected with a power supply; the resistor R9 is connected with the main control chip; the other end of the resistor R10 is grounded.
6. The regional explosion-proof audible alarm circuit of claim 1, wherein the audible driving circuit comprises a TDA7498 chip, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a resistor R11, a resistor R12, a resistor R13, an inductor L1, an inductor L2 and a digital potentiometer;
one end of the capacitor C2 and one end of the capacitor C3 are connected with a 32 nd pin of the TDA7498 chip; the other end of the capacitor C2 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C3 is grounded; the 3 rd pin, the 5 th pin and the 8 th pin of the digital potentiometer U3 are connected with the main control chip;
one end of the capacitor C4 and one end of the capacitor C5 are connected with the 33 rd pin of the TDA7498 chip; the other end of the capacitor C4 is grounded; the other end of the capacitor C5 is grounded;
one end of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 is connected with the 4 th pin and the 5 th pin of the TDA7498 chip and is grounded; the other ends of the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 are connected with a pin 6 and a pin 7 of the TDA7498 chip and are externally connected with a power supply;
one end of the capacitor C11 is connected with the 8 th pin and the 9 th pin of the TDA7498 chip, and the other end of the capacitor C11 is connected with one end of the resistor R11; the other end of the resistor R11 is connected with the No. 2 pin and the No. 3 pin of the TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R11, and the other end of the inductor L1 is connected with one end of the capacitor C12; one end of the inductor L2 is connected with one end of the capacitor C11, and the other end of the inductor L2 is connected with the other end of the capacitor C12;
one end of the capacitor C13 is connected to the other end of the inductor L1, the other end of the capacitor C13 is connected to the other end of the inductor L2 through the capacitor C14, and the other end of the capacitor C13 is grounded;
one end of the resistor R12 is connected with the other end of the inductor L1, and the other end of the resistor R12 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the capacitor C16; the other end of the capacitor C16 is connected with one end of the resistor R13; the other end of the resistor R13 is connected with the other end of the inductor L2; the capacitor C15 is grounded; one end of the resistor R12 and the other end of the resistor R13 are used for connecting a loudspeaker.
7. The area explosion proof audible alarm circuit of any one of claims 1 to 6, wherein the optical alarm output circuit comprises an optical alarm control circuit and a light emitting circuit; one end of the light alarm control circuit is connected with the main control chip, and the other end of the light alarm control circuit is connected with the light emitting circuit.
8. The zone explosion proof audible alarm circuit of claim 7, wherein the light alarm control circuit comprises a resistor R14, a resistor R15, a capacitor C17, and a transistor Q2; one end of the resistor R14 is connected with the main control chip, and the other end of the resistor R15 is connected with one end of the capacitor C17; the other ends of the resistor R15 and the capacitor C17 are grounded; the base electrode of the triode Q2 is connected with the other end of the resistor R14, the collector electrode of the triode Q2 is connected with the light-emitting circuit, and the emitting electrode of the triode Q2 is grounded.
9. An alarm circuit of a regional explosion-proof audible alarm according to any one of claims 1 to 8, further comprising an alarm housing;
the regional explosion-proof sound alarm circuit is arranged in the alarm shell.
10. A zonal explosion proof audible alarm system comprising a plurality of zonal explosion proof audible alarms of claim 9; the system also comprises a server, background equipment and a plurality of associated equipment;
the regional explosion-proof sound alarms are connected with the associated equipment in a one-to-one correspondence manner; each regional explosion-proof sound alarm is respectively connected with the server; the server is connected with the background equipment; and the associated equipment is used for sending an alarm signal to the regional explosion-proof audible alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021422352.3U CN212647608U (en) | 2020-07-17 | 2020-07-17 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021422352.3U CN212647608U (en) | 2020-07-17 | 2020-07-17 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
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| CN212647608U true CN212647608U (en) | 2021-03-02 |
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Address after: 510620 32nd floor, tower a, 191 TIYU West Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: SINOPEC GUANGZHOU ENGINEERING Co.,Ltd. Patentee after: Shenzhen noan intelligent Co., Ltd Address before: 510620 32nd floor, tower a, 191 TIYU West Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: SINOPEC GUANGZHOU ENGINEERING Co.,Ltd. Patentee before: Shenzhen noan environmental safety Co., Ltd |
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