CN111724552B - 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
- Publication number
- CN111724552B CN111724552B CN202010690320.XA CN202010690320A CN111724552B CN 111724552 B CN111724552 B CN 111724552B CN 202010690320 A CN202010690320 A CN 202010690320A CN 111724552 B CN111724552 B CN 111724552B
- Authority
- CN
- China
- Prior art keywords
- capacitor
- resistor
- pin
- circuit
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012545 processing Methods 0.000 claims abstract description 18
- 230000008054 signal transmission Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 305
- 230000002457 bidirectional effect Effects 0.000 claims description 33
- 238000004891 communication Methods 0.000 claims description 29
- 238000004880 explosion Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 5
- 238000011900 installation process Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000001795 light effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The application relates to a regional explosion-proof audible alarm circuit, a regional explosion-proof audible alarm and a system; the area explosion-proof audible alarm circuit comprises a main control chip, a wireless power amplification circuit, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and an audible driving circuit, wherein the main control chip is respectively connected with the wireless power amplification circuit, the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the optical alarm output circuit and the audible driving circuit, so that the area explosion-proof audible alarm circuit can receive wireless alarm signals transmitted from outside to carry out audible and visual alarm, the line wiring of the equipment installation process is avoided, the installation cost is saved, in addition, the setting operation can be carried out by utilizing the explosion-proof infrared remote controller, the on-site electrified uncapping operation is realized, the setting operation is simplified, the time cost of workers is saved, and the error probability is reduced.
Description
Technical Field
The application relates to the technical field of concentration alarm of explosive gas and toxic and harmful gas in an industrial field, in particular to a regional explosion-proof audible alarm circuit, a regional explosion-proof audible alarm and a system.
Background
In industrial sites such as large petrochemical industry, dangerous situations such as leakage of explosive gas and toxic and harmful gas exist, and when dangerous situations occur, on-site staff needs to be warned so as to evacuate staff and check risks in time. At present, an alarm is generally installed on the industrial site such as large petrochemical industry to carry out safety alarm, but in the implementation process, the inventor finds that at least the following problems exist in the traditional technology: the traditional alarm is complex in setting and operation, and high in installation and arrangement cost.
Disclosure of Invention
Based on the problems of complex operation, high installation and arrangement cost of the traditional alarm, the regional explosion-proof acoustic alarm circuit, the regional explosion-proof acoustic alarm and the system are provided.
In order to achieve the above objective, in one aspect, an embodiment of the present application provides an area explosion-proof acoustic alarm circuit, including a main control chip, a wireless power amplifier circuit, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit, and an acoustic driving circuit;
The main control chip is respectively connected with the wireless power amplifier circuit, the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the optical alarm output circuit and the sound driving circuit.
In one embodiment, the wireless power amplifier circuit comprises an acoustic power amplifier circuit and a wireless communication module;
the connector of the wireless communication module is respectively connected with the sound power amplifier circuit and the main control chip; the sound power amplifier circuit is used for driving a loudspeaker; the wireless communication module is used for receiving an externally input wireless signal.
In one embodiment, the acoustic power amplifier circuit includes a first TDA7498 chip, a capacitor C1, 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 resistor R1, a resistor R2, a resistor R3, an inductor L1, and an inductor L2;
one end of the capacitor C1 and one end of the capacitor C2 are connected with the 22 nd pin of the first TDA7498 chip; the other end of the capacitor C1 is connected with a connector of the wireless communication module; the other end of the capacitor C2 is grounded;
one end of the capacitor C3 and one end of the capacitor C4 are connected with the 23 rd pin of the first TDA7498 chip; the other end of the capacitor C3 is connected with a connector of the wireless communication module; the other end of the capacitor C4 is grounded;
One end of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 is connected with the 4 th pin and the 5 th pin of the first TDA7498 chip and is grounded; the other ends of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are connected with the 6 th pin and the 7 th pin of the first TDA7498 chip and are externally connected with a power supply;
One end of the capacitor C10 is connected with the 8 th pin and the 9 th pin of the first TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R1; the other end of the resistor R1 is connected with the 2 nd pin and the 3 rd pin of the first TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R1, and the other end of the inductor L is connected with one end of the capacitor C11; one end of the inductor L2 is connected with one end of the capacitor C10, and the other end of the inductor L2 is connected with the other end of the capacitor C11;
one end of the capacitor C12 is connected with the other end of the inductor L1, the other end of the capacitor C12 is connected with the other end of the inductor L2 through the capacitor C13, and the other end of the capacitor C12 is grounded;
one end of the resistor R2 is connected with the other end of the inductor L1, and the other end of the resistor R2 is connected with one end of the capacitor C14; the other end of the capacitor C14 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the resistor R3; the other end of the resistor R3 is connected with the other end of the inductor L2; capacitor C14 is grounded; one end of the resistor R2 and the other end of the resistor R3 are used for connecting a speaker.
In one embodiment, the signal transmission circuit includes an SP3485 chip, a transistor Q1, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C16, a fuse F1, a fuse F2, a bidirectional TVS tube D1, and a bidirectional TVS tube D2;
The emitter of the triode Q1 is externally connected with a power supply, the base is connected with one end of a resistor R4, and the collector is connected with one end of a resistor R5 and the 2 nd pin and the 3 rd pin of the SP3485 chip; the other end of the resistor R4 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R5 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 C16 is connected with the 8 th pin of the SP3485 chip, and the other end of the capacitor C is connected with one end of the resistor R6 and grounded; the other end of the resistor R6 is connected with the 7 th pin of the SP3485 chip;
one end of the resistor R7 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 of the fuse F1 is grounded through a bidirectional TVS tube D1; the other end of the fuse F1 is used as an external wiring terminal;
One end of the fuse F2 is connected with the 7 th pin of the SP3485 chip, and the other end of the fuse F2 is grounded through a bidirectional TVS tube D2; the other end of the fuse F2 serves as an external connection terminal.
In one embodiment, the infrared receiving circuit comprises an infrared receiving tube U1, a capacitor C17 and a resistor R8;
The first end of the infrared receiving tube U1 is connected with one end of the resistor R8, the second end of the infrared receiving tube U is connected with the main control chip, and the third end of the infrared receiving tube U is connected with the ground;
the other end of the resistor R8 is connected with one end of the capacitor C17 and is externally connected with a power supply; the other end of the capacitor C17 is grounded.
In one embodiment, the infrared receiving tube U1 is an HS0038 type infrared receiving tube U1.
In one embodiment, the signal processing circuit includes a fuse F3, a fuse F4, a varistor RV1, a varistor RV2, a bidirectional TVS tube D3, a bidirectional TVS tube D4, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, and a photo-coupler 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 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 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 R9 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 R10 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 R11; the other end of the resistor R11 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 of the photoelectric coupler U is connected with a resistor R12 and a resistor R13, and the fourth end of the photoelectric coupler U is externally connected with a power supply; the resistor R12 is connected with the main control chip; the other end of the resistor R13 is grounded.
In one embodiment, the acoustic driver circuit includes a second TDA7498 chip, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R14, a resistor R15, a resistor R16, an inductor L3, an inductor L4, and a digital potentiometer;
One end of the capacitor C18 and one end of the capacitor C19 are connected with the 32 nd pin of the second TDA7498 chip; the other end of the capacitor C18 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C19 is grounded; the 3 rd pin, the 5 th pin and the 8 th pin of the digital potentiometer U3 are connected with the active chip;
one end of the capacitor C20 and one end of the capacitor C21 are connected with the 33 rd pin of the first TDA7498 chip; the other end of the capacitor C20 is grounded; the other end of the capacitor C21 is grounded;
One end of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 is connected with the 4 th pin and the 5 th pin of the second TDA7498 chip and is grounded; the other ends of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 are connected with the 6 th pin and the 7 th pin of the second TDA7498 chip and are externally connected with a power supply;
one end of the capacitor C27 is connected with the 8 th pin and the 9 th pin of the second TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R14; the other end of the resistor R14 is connected with the 2 nd pin and the 3 rd pin of the second TDA7498 chip;
One end of the inductor L3 is connected with the other end of the resistor R14, and the other end of the inductor L is connected with one end of the capacitor C28; one end of the inductor L4 is connected with one end of the capacitor C27, and the other end of the inductor L4 is connected with the other end of the capacitor C28;
One end of the capacitor C29 is connected with the other end of the inductor L3, the other end of the capacitor C29 is connected with the other end of the inductor L4 through the capacitor C30, and the other end of the capacitor C29 is grounded;
One end of the resistor R15 is connected with the other end of the inductor L3, and the other end of the resistor R is connected with one end of the capacitor C31; the other end of the capacitor C31 is connected with one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the resistor R16; the other end of the resistor R16 is connected with the other end of the inductor L4; capacitor C31 is grounded; one end of the resistor R15 and the other end of the resistor R16 are used to connect a speaker.
On the other hand, the embodiment of the application also provides an area explosion-proof acoustic alarm which comprises the area explosion-proof acoustic alarm circuit and an alarm shell;
The regional explosion-proof audible alarm circuit is arranged in the alarm shell.
In still another aspect, the embodiment of the application further provides an area explosion-proof acoustic alarm system, which comprises a plurality of the area explosion-proof acoustic alarms; the system also comprises a server, background equipment and a plurality of associated equipment;
the regional explosion-proof audible alarms are in one-to-one correspondence and are in wireless connection with each associated device; the explosion-proof audible alarm devices in all areas are respectively and wirelessly connected with the server; the server is connected with background equipment; the associated 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 audible alarm circuit provided by the embodiments of the application comprises a main control chip, a wireless power amplification circuit, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and an audible driving circuit, wherein the main control chip is respectively connected with the wireless power amplification circuit, the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the optical alarm output circuit and the audible driving circuit, so that the regional explosion-proof audible alarm circuit can receive wireless alarm signals transmitted from outside to carry out audible and visual alarm, the line wiring of the equipment installation process is avoided, the installation cost is saved, in addition, the setting operation can be carried out by utilizing an explosion-proof infrared remote controller, the on-site electrified uncapping operation is realized, the setting operation is simplified, the time cost of staff is saved, and the error probability is reduced.
Drawings
FIG. 1 is a schematic diagram of a zone explosion proof audible alarm circuit in one embodiment;
FIG. 2 is a schematic diagram of an audio amplifier circuit according to an embodiment;
FIG. 3 is a circuit schematic of a connector of a wireless communication module in one embodiment;
FIG. 4 is a schematic circuit diagram of a signal transmission circuit in one embodiment;
FIG. 5 is a schematic circuit diagram of an infrared receiving circuit according to one embodiment;
FIG. 6 is a schematic circuit diagram of a signal processing circuit in one embodiment;
FIG. 7 is a schematic circuit diagram of an acoustic driver circuit in one embodiment;
FIG. 8 is a circuit schematic of an optical alarm control circuit in one embodiment;
FIG. 9 is a circuit schematic of a lighting circuit in one embodiment;
fig. 10 is a schematic structural diagram of a zone explosion-proof acoustic alarm in one embodiment.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended 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 and integrated with the other element or intervening elements may also be present. The terms "disposed," "one end," "the other end," and the like are used herein 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 application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order to solve the technical problems of complicated setting operation and high installation and arrangement cost of the traditional alarm, in one embodiment, as shown in fig. 1, an area explosion-proof acoustic alarm circuit is provided, which comprises a main control chip 11, a wireless power amplifier circuit 13, a signal transmission circuit 15, an infrared receiving circuit 17, a signal processing circuit 19, an optical alarm output circuit 21 and an acoustic driving circuit 23;
the main control chip 11 is respectively connected with the wireless power amplifier circuit 13, the signal transmission circuit 15, the infrared receiving circuit 17, the signal processing circuit 19, the optical alarm output circuit 21 and the acoustic driving circuit 23.
It should be noted that, the main control chip is a control center of the area explosion-proof audible alarm circuit, and in one example, the main control chip is an STM32RCT6 type chip.
The wireless power amplifier circuit adopts a modularized design and has the functions of wireless communication and acoustic power amplifier. In one example, the wireless power amplifier circuit includes an acoustic power amplifier circuit and a wireless communication module; the connector of the wireless communication module is respectively connected with the sound power amplifier circuit and the main control chip; the sound power amplifier circuit is used for driving a loudspeaker; the wireless communication module is used for receiving an externally input wireless signal. The sound power amplifier circuit plays a corresponding sound alarm by driving the loudspeaker according to the wireless signal received by the wireless communication module, 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, the audio alarm frequency of broadcasting is low, the tone is low; evacuation voice guides can also be played. The wireless signal comprises an alarm signal (such as an audio signal), a control signal and the like, and the wireless signal can be sent by the associated equipment or sent by the background monitoring equipment through a server. The wireless communication module may be a 4G (the 4th generation mobile communication technology, fourth generation mobile communication technology) wireless communication module, a 5G (t 5th generation mobile networks, fifth generation mobile communication technology) wireless communication module, or the like.
In one example, as shown in fig. 2, the acoustic power amplifier circuit includes a first TDA7498 chip, a capacitor C1, 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 resistor R1, a resistor R2, a resistor R3, an inductor L1, and an inductor L2;
one end of the capacitor C1 and one end of the capacitor C2 are connected with the 22 nd pin of the first TDA7498 chip; the other end of the capacitor C1 is connected with a connector of the wireless communication module; the other end of the capacitor C2 is grounded;
one end of the capacitor C3 and one end of the capacitor C4 are connected with the 23 rd pin of the first TDA7498 chip; the other end of the capacitor C3 is connected with a connector of the wireless communication module; the other end of the capacitor C4 is grounded;
One end of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 is connected with the 4 th pin and the 5 th pin of the first TDA7498 chip and is grounded; the other ends of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are connected with the 6 th pin and the 7 th pin of the first TDA7498 chip and are externally connected with a power supply;
One end of the capacitor C10 is connected with the 8 th pin and the 9 th pin of the first TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R1; the other end of the resistor R1 is connected with the 2 nd pin and the 3 rd pin of the first TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R1, and the other end of the inductor L is connected with one end of the capacitor C11; one end of the inductor L2 is connected with one end of the capacitor C10, and the other end of the inductor L2 is connected with the other end of the capacitor C11;
one end of the capacitor C12 is connected with the other end of the inductor L1, the other end of the capacitor C12 is connected with the other end of the inductor L2 through the capacitor C13, and the other end of the capacitor C12 is grounded;
one end of the resistor R2 is connected with the other end of the inductor L1, and the other end of the resistor R2 is connected with one end of the capacitor C14; the other end of the capacitor C14 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the resistor R3; the other end of the resistor R3 is connected with the other end of the inductor L2; capacitor C14 is grounded; one end of the resistor R2 and the other end of the resistor R3 are used for connecting a speaker.
It should be noted that, as shown in fig. 3, the connector of the wireless communication module is a connector, the wireless communication module is connected with the main control chip through the 3 rd, 4 th, 5 th and 6 th pins of the connector, the main control chip controls the reset of the wireless communication module through the 3 rd pin, controls the switch of the wireless communication module through the 4 th pin, and performs data interaction with the wireless communication module through the 5 th and 6 th pins, so as to realize the functions of receiving the control setting working mode of the external device, sending the current working state to the external device and receiving the alarm signal input by the external device. The wireless communication module is connected with the sound power amplifier circuit through the 7 th pin and the 8 th pin of the connector, specifically, the 7 th pin of the connector is connected with the capacitor C1, the 8 th pin of the connector is connected with the capacitor C3, and the audio signal received by the wireless communication module is received.
The signal transmission circuit is used for realizing on-site wired data transmission, for example, receiving wired signals through the signal transmission circuit, realizing wired setting working modes, sending current working states, receiving alarm signals and the like. In one example, as shown in fig. 4, the signal transmission circuit includes an SP3485 chip, a triode Q1, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C16, a fuse F1, a fuse F2, a bidirectional TVS (TRANSIENT VOLTAGE SUPPRESSOR, transient diode) tube D1, and a bidirectional TVS tube D2;
The emitter of the triode Q1 is externally connected with a power supply, the base is connected with one end of a resistor R4, and the collector is connected with one end of a resistor R5 and the 2 nd pin and the 3 rd pin of the SP3485 chip; the other end of the resistor R4 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R5 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 C16 is connected with the 8 th pin of the SP3485 chip, and the other end of the capacitor C is connected with one end of the resistor R6 and grounded; the other end of the resistor R6 is connected with the 7 th pin of the SP3485 chip;
one end of the resistor R7 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 of the fuse F1 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. 4);
one end of the fuse F2 is connected with the 7 th pin of the SP3485 chip, and the other end of the fuse F2 is grounded through a bidirectional TVS tube D2; the other end of the fuse F2 serves as an external connection terminal (J4-1 in fig. 4).
The infrared receiving circuit is used for receiving the infrared carrier signal and carrying out carrier decoding on the infrared carrier signal, so that the control of the regional explosion-proof audible alarm circuit is realized, the effects of live electrification, uncapping and flexible setting of the working mode are achieved, and in one example, as shown in fig. 5, the infrared receiving circuit comprises an infrared receiving tube U1, a capacitor C17 and a resistor R8;
The first end of the infrared receiving tube U1 is connected with one end of the resistor R8, the second end of the infrared receiving tube U is connected with the main control chip, and the third end of the infrared receiving tube U is connected with the ground;
the other end of the resistor R8 is connected with one end of the capacitor C17 and is externally connected with a power supply; the other end of the capacitor C17 is grounded.
Further, in one example, the infrared receiving tube U1 is an HS0038 type infrared receiving tube U1.
When the signal processing circuit detects the input of an alarm signal, the alarm is controlled to alarm, in one example, as shown in fig. 6, 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 R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13 and a photoelectric coupler 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 is used as an external wiring terminal (S1 in FIG. 6); 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 is used as an external wiring terminal (S2 in FIG. 6); the other ends of the piezoresistor RV2 and the bidirectional TVS tube D4 are grounded;
One end of the resistor R9 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 R10 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 R11; the other end of the resistor R11 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 of the photoelectric coupler U is connected with a resistor R12 and a resistor R13, and the fourth end of the photoelectric coupler U is externally connected with a power supply; the resistor R12 is connected with the main control chip; the other end of the resistor R13 is grounded.
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 photo coupler U2 is a PC817X1CSP9F type photo coupler. When the signal processing circuit detects the input of an alarm signal, 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 another path of loudspeaker driving circuit of the regional explosion-proof sound alarm, is switched with a sound power amplifier circuit in the wireless power amplifier circuit through a relay, and plays a corresponding sound alarm by driving a loudspeaker according to a signal sent by a 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, the audio alarm frequency of broadcasting is low, the tone is low; evacuation voice guides can also be played.
In one example, as shown in fig. 7, the acoustic driving circuit includes a second TDA7498 chip, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C31, a capacitor C32, a resistor R14, a resistor R15, a resistor R16, an inductor L3, an inductor L4, and a digital potentiometer;
One end of the capacitor C18 and one end of the capacitor C19 are connected with the 32 nd pin of the second TDA7498 chip; the other end of the capacitor C18 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C19 is grounded; the 3 rd pin, the 5 th pin and the 8 th pin of the digital potentiometer U3 are connected with the active chip;
one end of the capacitor C20 and one end of the capacitor C21 are connected with the 33 rd pin of the first TDA7498 chip; the other end of the capacitor C20 is grounded; the other end of the capacitor C21 is grounded;
One end of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 is connected with the 4 th pin and the 5 th pin of the second TDA7498 chip and is grounded; the other ends of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 are connected with the 6 th pin and the 7 th pin of the second TDA7498 chip and are externally connected with a power supply;
one end of the capacitor C27 is connected with the 8 th pin and the 9 th pin of the second TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R14; the other end of the resistor R14 is connected with the 2 nd pin and the 3 rd pin of the second TDA7498 chip;
One end of the inductor L3 is connected with the other end of the resistor R14, and the other end of the inductor L is connected with one end of the capacitor C28; one end of the inductor L4 is connected with one end of the capacitor C27, and the other end of the inductor L4 is connected with the other end of the capacitor C28;
One end of the capacitor C29 is connected with the other end of the inductor L3, the other end of the capacitor C29 is connected with the other end of the inductor L4 through the capacitor C30, and the other end of the capacitor C29 is grounded;
One end of the resistor R15 is connected with the other end of the inductor L3, and the other end of the resistor R is connected with one end of the capacitor C31; the other end of the capacitor C31 is connected with one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the resistor R16; the other end of the resistor R16 is connected with the other end of the inductor L4; capacitor C31 is grounded; one end of the resistor R15 and the other end of the resistor R16 are used to connect a speaker.
The light alarm output circuit is used for outputting light alarm, and the light alarm can emit light effects of various modes, such as light effect of a flashing mode and light effect of a rotating mode, under the control of the main control chip. Different colored light effects may also be emitted, with different colors corresponding to different alarms, for example, in one example, the light alarm output circuit includes a light effect that can emit two colors.
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 is connected with the light emitting circuit. In one example, the zone of the present application has 6 sets of light alarm output circuits in the explosion proof audible alarm circuit. In one example, as shown in fig. 8, the light alarm control circuit includes a resistor R17, a resistor R18, a capacitor C33, and a transistor Q2; one end of the resistor R17 is connected with the main control chip, and the other end of the resistor R18 is connected with one end of the capacitor C33; the other ends of the resistor R18 and the capacitor C33 are grounded; the base electrode of the triode Q2 is connected with the other end of the resistor R17, the collector electrode is connected with the light-emitting circuit, and the emitter electrode is grounded. In one example, as shown in fig. 9, the light emitting circuit includes a plurality of light emitting diodes LEDs, a resistor R19, and a resistor R20; one end of the resistor R19 and one end of the resistor R20 are connected with the collector electrode of the triode Q2; the other end of the resistor R19 is connected with the other end of the resistor R20 in series with a plurality of Light Emitting Diodes (LEDs); any two Light Emitting Diodes (LEDs) are used as output ends.
The application discloses an area explosion-proof audible alarm circuit, which comprises a main control chip, a wireless power amplification circuit, a signal transmission circuit, an infrared receiving circuit, a signal processing circuit, an optical alarm output circuit and an audible driving circuit, wherein the main control chip is respectively connected with the wireless power amplification circuit, the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the optical alarm output circuit and the audible driving circuit.
In one embodiment, there is also provided an area explosion-proof acoustic alarm including the area explosion-proof acoustic alarm circuit of the embodiments of the area explosion-proof acoustic alarm circuit of the present application, and further including an alarm housing;
The regional explosion-proof audible alarm circuit is arranged in the alarm shell.
It should be noted that, in this embodiment, the area explosion-proof acoustic alarm circuit is the same as the area explosion-proof acoustic alarm circuit described in each embodiment of the area explosion-proof acoustic alarm circuit of the present application, and detailed description is omitted herein.
In one embodiment, as shown in fig. 10, there is further provided a zone explosion-proof acoustic alarm system, including a plurality of the zone explosion-proof acoustic alarms 101; also included are a server 103, a background device 105, and a plurality of associated devices 107;
The area explosion-proof audible alarm 101 is in one-to-one correspondence with each associated device 107; the explosion-proof audible alarm 101 in each area is respectively and wirelessly connected with the server 103; the server 103 is connected with the background device 105; the association device 107 is a device for transmitting an alarm signal to the zone explosion proof acoustic alarm 101.
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 conforming to an electrical characteristic, where the alarm signal is generated and transmitted to the area explosion-proof audible alarm by wireless or wired means.
The background equipment can directly transmit voice signals, control signals and the like to the regional explosion-proof acoustic alarm through the server, and the regional explosion-proof acoustic alarm can also feed back the current running state, the received alarm signals transmitted by the associated equipment and the like to the background equipment through the server so as to enable the background equipment to track and record the regional explosion-proof acoustic alarm.
In each embodiment of the regional explosion-proof acoustic alarm system, the regional explosion-proof acoustic alarm system can quickly respond to dangerous situations and alarm in time, so that the safety level of an industrial site is improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (8)
1. The regional explosion-proof audible alarm circuit is characterized by comprising a main control chip, a wireless power amplifier circuit, 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 wireless power amplification circuit, the signal transmission circuit, the infrared receiving circuit, the signal processing circuit, the optical alarm output circuit and the sound driving circuit;
the wireless power amplifier circuit comprises an acoustic power amplifier circuit and a wireless communication module;
The connector of the wireless communication module is respectively connected with the sound power amplifier circuit and the main control chip; the sound power amplifier circuit is used for driving a loudspeaker; the wireless communication module is used for receiving wireless signals input from the outside; the sound power amplifier circuit plays a corresponding sound alarm by driving a loudspeaker according to the wireless signal received by the wireless communication module;
The acoustic power amplifier circuit comprises a first TDA7498 chip, a capacitor C1, 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 resistor R1, a resistor R2, a resistor R3, an inductor L1 and an inductor L2;
One end of the capacitor C1 and one end of the capacitor C2 are connected with the 22 nd pin of the first TDA7498 chip; the other end of the capacitor C1 is connected with a connector of the wireless communication module; the other end of the capacitor C2 is grounded;
one end of the capacitor C3 and one end of the capacitor C4 are connected with the 23 rd pin of the first TDA7498 chip; the other end of the capacitor C3 is connected with a connector of the wireless communication module; the other end of the capacitor C4 is grounded;
One end of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 is connected to the 4 th pin and the 5 th pin of the first TDA7498 chip, and is grounded; the other ends of the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are connected with the 6 th pin and the 7 th pin of the first TDA7498 chip and are externally connected with a power supply;
One end of the capacitor C10 is connected with the 8 th pin and the 9 th pin of the first TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R1; the other end of the resistor R1 is connected with the 2 nd pin and the 3 rd pin of the first TDA7498 chip;
one end of the inductor L1 is connected with the other end of the resistor R1, and the other end of the inductor L is connected with one end of the capacitor C11; one end of the inductor L2 is connected with one end of the capacitor C10, and the other end of the inductor L is connected with the other end of the capacitor C11;
one end of the capacitor C12 is connected with the other end of the inductor L1, the other end of the capacitor C12 is connected with the other end of the inductor L2 through the capacitor C13, and the other end of the capacitor C12 is grounded;
One end of the resistor R2 is connected with the other end of the inductor L1, and the other end of the resistor R2 is connected with one end of the capacitor C14; the other end of the capacitor C14 is connected with one end of the capacitor C15; the other end of the capacitor C15 is connected with one end of the resistor R3; the other end of the resistor R3 is connected with the other end of the inductor L2; the capacitor C14 is grounded; one end of the resistor R2 and the other end of the resistor R3 are used for being connected with the loudspeaker.
2. The area explosion-proof audible alarm circuit according to claim 1, wherein the signal transmission circuit comprises an SP3485 chip, a triode Q1, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C16, a fuse F1, a fuse F2, a bidirectional TVS tube D1 and a bidirectional TVS tube D2;
the emitter of the triode Q1 is externally connected with a power supply, the base electrode is connected with one end of the resistor R4, and the collector electrode is connected with one end of the resistor R5 and the 2 nd pin and the 3 rd pin of the SP3485 chip; the other end of the resistor R4 is connected with the 4 th pin of the SP3485 chip; the other end of the resistor R5 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 C16 is connected with the 8 th pin of the SP3485 chip, and the other end of the capacitor C is connected with one end of the resistor R6 and grounded; the other end of the resistor R6 is connected with the 7 th pin of the SP3485 chip;
One end of the resistor R7 is connected with the 6 th pin of the SP3485 chip, and the other end of the resistor R7 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 of the fuse F1 is grounded through the bidirectional TVS tube D1; the other end of the fuse F1 is used as an external wiring terminal;
One end of the fuse F2 is connected with the 7 th pin of the SP3485 chip, and the other end of the fuse F2 is grounded through the bidirectional TVS tube D2; the other end of the fuse F2 is used as an external wiring terminal.
3. The area explosion-proof audible alarm circuit according to claim 1, wherein the infrared receiving circuit comprises an infrared receiving tube U1, a capacitor C17 and a resistor R8;
the first end of the infrared receiving tube U1 is connected with one end of the resistor R8, the second end of the infrared receiving tube U is connected with the main control chip, and the third end of the infrared receiving tube U is connected with the ground;
The other end of the resistor R8 is connected with one end of the capacitor C17 and is externally connected with a power supply; the other end of the capacitor C17 is grounded.
4. A zone explosion proof acoustic alarm circuit according to claim 3, wherein the infrared receiver tube U1 is an HS0038 type infrared receiver tube U1.
5. The area explosion-proof audible alarm circuit according to claim 1, wherein the signal processing circuit comprises a fuse F3, a fuse F4, a varistor RV1, a varistor RV2, a bi-directional TVS tube D3, a bi-directional TVS tube D4, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, and a photo-coupler 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 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 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 R9 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 R10 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 R11; the other end of the resistor R11 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 of the photoelectric coupler U is connected with the resistor R12 and the resistor R13, and the fourth end of the photoelectric coupler U is externally connected with a power supply; the resistor R12 is connected with the main control chip; the other end of the resistor R13 is grounded.
6. The area explosion-proof acoustic alarm circuit according to any one of claims 1 to 5, wherein the acoustic driver circuit comprises a second TDA7498 chip, capacitor C18, capacitor C19, capacitor C20, capacitor C21, capacitor C22, capacitor C23, capacitor C24, capacitor C25, capacitor C26, capacitor C27, capacitor C28, capacitor C29, capacitor C30, capacitor C31, capacitor C32, resistor R14, resistor R15, resistor R16, inductor L3, inductor L4, and a digital potentiometer;
One end of the capacitor C18 and one end of the capacitor C19 are connected with the 32 nd pin of the second TDA7498 chip; the other end of the capacitor C18 is connected with the 4 th pin of the digital potentiometer U3; the other end of the capacitor C19 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 C20 and one end of the capacitor C21 are connected with a 33 rd pin of the first TDA7498 chip; the other end of the capacitor C20 is grounded; the other end of the capacitor C21 is grounded;
One end of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 is connected to the 4 th pin and the 5 th pin of the second TDA7498 chip, and is grounded; the other ends of the capacitor C22, the capacitor C23, the capacitor C24, the capacitor C25 and the capacitor C26 are connected with the 6 th pin and the 7 th pin of the second TDA7498 chip and are externally connected with a power supply;
One end of the capacitor C27 is connected with the 8 th pin and the 9 th pin of the second TDA7498 chip, and the other end of the capacitor C is connected with one end of the resistor R14; the other end of the resistor R14 is connected with the 2 nd pin and the 3 rd pin of the second TDA7498 chip;
One end of the inductor L3 is connected with the other end of the resistor R14, and the other end of the inductor L is connected with one end of the capacitor C28; one end of the inductor L4 is connected with one end of the capacitor C27, and the other end of the inductor L is connected with the other end of the capacitor C28;
one end of the capacitor C29 is connected with the other end of the inductor L3, the other end of the capacitor C29 is connected with the other end of the inductor L4 through the capacitor C30, and the other end of the capacitor C29 is grounded;
One end of the resistor R15 is connected with the other end of the inductor L3, and the other end of the resistor R is connected with one end of the capacitor C31; the other end of the capacitor C31 is connected with one end of the capacitor C32; the other end of the capacitor C32 is connected with one end of the resistor R16; the other end of the resistor R16 is connected with the other end of the inductor L4; the capacitor C31 is grounded; one end of the resistor R15 and the other end of the resistor R16 are used for connecting a speaker.
7. An area explosion-proof acoustic alarm, comprising the area explosion-proof acoustic alarm circuit of any one of claims 1 to 6, further comprising an alarm housing;
the regional explosion-proof audible alarm circuit is arranged in the alarm shell.
8. A zone explosion-proof acoustic alarm system comprising a plurality of zone explosion-proof acoustic alarms of claim 7; the system also comprises a server, background equipment and a plurality of associated equipment;
the regional explosion-proof audible alarms are in one-to-one correspondence and are in wireless connection with each associated device; each regional explosion-proof audible alarm is respectively and wirelessly connected with the server; the server is connected with the background equipment; the association equipment is used for sending alarm signals to the regional explosion-proof audible alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690320.XA CN111724552B (en) | 2020-07-17 | 2020-07-17 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690320.XA CN111724552B (en) | 2020-07-17 | 2020-07-17 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111724552A CN111724552A (en) | 2020-09-29 |
| CN111724552B true CN111724552B (en) | 2024-09-13 |
Family
ID=72572749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010690320.XA Active CN111724552B (en) | 2020-07-17 | 2020-07-17 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111724552B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114658487A (en) * | 2022-03-17 | 2022-06-24 | 湖南创安防爆电器有限公司 | Multifunctional voice signal alarm for mine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205722277U (en) * | 2016-04-28 | 2016-11-23 | 杭州寒舍科技有限公司 | A kind of intelligent smog warning system based on wireless Wi-Fi |
| CN206451012U (en) * | 2017-02-22 | 2017-08-29 | 广东石油化工学院 | Embedded board based on STM32F103ZET6 |
| KR101931453B1 (en) * | 2017-12-29 | 2018-12-20 | 노홍구 | Audio transmitting apparatus for indoor and outdoor |
| CN208969828U (en) * | 2018-08-27 | 2019-06-11 | 沈阳天眼智云信息科技有限公司 | A kind of combined intelligent monitoring device |
| CN109979153A (en) * | 2019-04-15 | 2019-07-05 | 电子科技大学中山学院 | Multifunctional wireless fire alarm device |
| CN212391860U (en) * | 2020-07-17 | 2021-01-22 | 中石化广州工程有限公司 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200268988Y1 (en) * | 1999-04-08 | 2002-03-18 | 김홍분 | Wireless warning device |
| CN204013965U (en) * | 2014-07-31 | 2014-12-10 | 庄仲岳 | a sound device |
| CN204718690U (en) * | 2015-05-20 | 2015-10-21 | 湖南工业大学 | A kind of Students ' Learning illuminance of head of a family's supervision tests wireless alarmer |
| CN106786468A (en) * | 2017-02-20 | 2017-05-31 | 广州中大南沙科技创新产业园有限公司 | A kind of RS485 telecommunication equipment lightning protections and observation circuit |
| CN107797494A (en) * | 2017-11-03 | 2018-03-13 | 韶山恒旺电气有限公司 | A kind of leaky feeder communication control circuit |
| CN108777052B (en) * | 2018-09-10 | 2024-08-13 | 深圳市高新投三江电子股份有限公司 | Low-power consumption wireless fire alarm system |
| CN110956777B (en) * | 2019-10-22 | 2022-07-05 | 视联动力信息技术股份有限公司 | Wireless networking alarm method, system, wireless networking alarm and video networking terminal |
-
2020
- 2020-07-17 CN CN202010690320.XA patent/CN111724552B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205722277U (en) * | 2016-04-28 | 2016-11-23 | 杭州寒舍科技有限公司 | A kind of intelligent smog warning system based on wireless Wi-Fi |
| CN206451012U (en) * | 2017-02-22 | 2017-08-29 | 广东石油化工学院 | Embedded board based on STM32F103ZET6 |
| KR101931453B1 (en) * | 2017-12-29 | 2018-12-20 | 노홍구 | Audio transmitting apparatus for indoor and outdoor |
| CN208969828U (en) * | 2018-08-27 | 2019-06-11 | 沈阳天眼智云信息科技有限公司 | A kind of combined intelligent monitoring device |
| CN109979153A (en) * | 2019-04-15 | 2019-07-05 | 电子科技大学中山学院 | Multifunctional wireless fire alarm device |
| CN212391860U (en) * | 2020-07-17 | 2021-01-22 | 中石化广州工程有限公司 | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111724552A (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2022202526A1 (en) | Gas monitor, system and method | |
| US6900726B2 (en) | System and method for fiber optic communication with safety-related alarm systems | |
| CN111724552B (en) | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system | |
| US4443786A (en) | Data transmission system employing wire and wireless transmission paths | |
| CN212391860U (en) | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system | |
| CN217080566U (en) | Multifunctional voice signal alarm for mine | |
| CN212647608U (en) | Regional explosion-proof audible alarm circuit, regional explosion-proof audible alarm and system | |
| CN202472375U (en) | Multifunctional remote monitoring system | |
| CN101893883B (en) | Alarm receiving and processing digitization management system for fire fighting | |
| CN220415465U (en) | Mining alarm device with edge calculation function and mining alarm system | |
| CN220564046U (en) | Elevator intercom device capable of reporting station by voice | |
| CN201336066Y (en) | GPRS remote control and alarming device for household appliances | |
| CN215898067U (en) | Explosion-proof intelligent multifunctional base station lamp | |
| CN212324088U (en) | Intelligent alarm system for multi-way switching value signal input and output | |
| CN219834144U (en) | Remote control module of transmitting system | |
| CN209842802U (en) | Acousto-optic alarm device | |
| US7986226B2 (en) | Remote output system and method | |
| CN223284651U (en) | Mining intrinsic safety type digital display audible and visual alarm circuit | |
| CN212112188U (en) | Real-time monitoring device for power distribution cabinet | |
| CN120639228A (en) | Nuclear power plant emergency communication system, and sound and light linked broadcasting system and alarm system | |
| KR200147075Y1 (en) | Fire alarm control device | |
| RU1809044C (en) | Object protective switching-off system | |
| JPS5975397A (en) | Receiving responder for alarm equipment | |
| JPH11103352A (en) | Doorphone system | |
| RU1771537C (en) | Self-contained alarm and telephone communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 510620 32nd floor, tower a, 191 TIYU West Road, Tianhe District, Guangzhou City, Guangdong Province Applicant after: SINOPEC GUANGZHOU ENGINEERING Co.,Ltd. Applicant after: Shenzhen noan intelligent Co.,Ltd. Address before: 510620 32nd floor, tower a, 191 TIYU West Road, Tianhe District, Guangzhou City, Guangdong Province Applicant before: SINOPEC GUANGZHOU ENGINEERING Co.,Ltd. Applicant before: SHENZHEN NUOAN ENVIRONMENTAL & SAFETY Inc. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |