CN212008396U - Harmful gas monitoring and early warning circuit - Google Patents
Harmful gas monitoring and early warning circuit Download PDFInfo
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- CN212008396U CN212008396U CN201921801050.4U CN201921801050U CN212008396U CN 212008396 U CN212008396 U CN 212008396U CN 201921801050 U CN201921801050 U CN 201921801050U CN 212008396 U CN212008396 U CN 212008396U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 230000003321 amplification Effects 0.000 claims abstract description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 26
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000003750 conditioning effect Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a harmful gas monitoring and early warning circuit, which comprises a gas identification circuit, a signal regulating circuit, a transistor switch circuit, a voice circuit, a signal amplifying circuit, a loudspeaker, a key switch and a power supply, wherein the gas identification circuit is electrically connected with the transistor switch circuit and the key switch and is used for identifying harmful gas and outputting an identification signal to the signal regulating circuit; the signal adjusting circuit is electrically connected with the transistor switch circuit and is used for adjusting the identification signal and outputting the identification signal to the transistor switch circuit; the transistor switch circuit is electrically connected with the voice circuit and is used for controlling the voice circuit to output a voice signal to the signal amplification circuit; the signal amplification circuit is electrically connected with the loudspeaker and is used for driving the loudspeaker to make sound. The utility model has the advantages of can guarantee staff's property safety, simple structure and with low costs.
Description
Technical Field
The utility model relates to a monitoring and early warning technical field, in particular to harmful gas monitoring and early warning circuit.
Background
With the development of science and technology, computer-aided technology has been widely applied in various industries. For example, the traditional mining mode has the problems of low efficiency, high cost, high risk coefficient and the like, and the loss which is difficult to recover is easily caused by slight carelessness, but nowadays with developed scientific and technical information, the computer-aided mining is utilized to improve the efficiency and reduce casualties, and simultaneously, the computer-aided mining is a new mining means with high economic benefit, convenience and originality and large data intellectualization, and in the mining process, the processes of blasting, planning, lighting, exploring, detecting, shouting, material input, mine ecological reconstruction and the like benefit from a brand-new technology of computer assistance. However, the existing computer is difficult to detect the gas components under the mine, is inconvenient to provide early warning information for workers, and has potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be, provide a harmful gas monitoring and early warning circuit that can provide the early warning for the computer staff in the mine.
The utility model provides a harmful gas monitoring and early warning circuit, which comprises a gas identification circuit, a signal regulating circuit, a transistor switch circuit, a voice circuit, a signal amplifying circuit, a loudspeaker, a key switch and a power supply, wherein the gas identification circuit is electrically connected with the transistor switch circuit and the key switch and is used for identifying harmful gas and outputting an identification signal to the signal regulating circuit; the signal adjusting circuit is electrically connected with the transistor switch circuit and is used for adjusting the identification signal and outputting the identification signal to the transistor switch circuit; the transistor switch circuit is electrically connected with the voice circuit and is used for controlling the voice circuit to output a voice signal to the signal amplification circuit; the signal amplification circuit is electrically connected with the loudspeaker and is used for driving the loudspeaker to make sound.
Preferably, the gas identification circuit includes a first capacitor, a first resistor, and a gas-sensitive resistor, the gas-sensitive resistor is provided with a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, and a sixth electrode, a first end of the first capacitor is electrically connected to the key switch, and a second end of the first capacitor is electrically connected to the first electrode, the third electrode, and a power supply in the gas-sensitive resistor; the first end of the first resistor is electrically connected with the key switch, the second end of the first resistor is electrically connected with the second end of the gas-sensitive resistor, the fourth electrode and the fifth electrode of the gas-sensitive resistor are electrically connected with the signal regulating circuit, and the fifth electrode of the gas-sensitive resistor is electrically connected with the negative electrode of the power supply.
Preferably, the signal conditioning circuit comprises a slide rheostat and a second resistor, wherein a first end of the slide rheostat is electrically connected with the key switch, and a second end of the slide rheostat is electrically connected with a fourth electrode and a sixth electrode in the gas-sensitive resistor; the first end of the second resistor is electrically connected with the slide rheostat, and the second end of the second resistor is electrically connected with the transistor switch circuit.
Preferably, the transistor switch circuit includes a second capacitor, a diode, a first triode, and a third resistor, a first end of the second capacitor is electrically connected to the key switch, and a second end of the second capacitor is electrically connected to the first end of the diode and the second resistor; the second end of the diode is electrically connected with the base electrode of the first triode; an emitting electrode of the first triode is electrically connected with the key switch, and a collecting electrode of the first triode is electrically connected with a first end of the third resistor; and the second end of the third resistor is electrically connected with the negative pole of the power supply.
Preferably, the voice circuit includes a fourth resistor, a third capacitor, and a voice chip, a first end of the fourth resistor is electrically connected to the key switch, a second end of the fourth resistor is electrically connected to a first pin of the voice chip, a first end of the third capacitor is electrically connected to the first pin of the voice chip and a second end of the fourth resistor, and a second end of the third capacitor is electrically connected to the negative electrode of the power supply.
Preferably, the signal amplification circuit includes a second triode, a collector of the second triode is electrically connected to the speaker, a base of the second triode is electrically connected to the fourth pin of the voice chip, and an emitter of the second triode is electrically connected to the negative electrode of the power supply.
Preferably, the harmful gas monitoring and early warning circuit further comprises an indicator light, a first end of the indicator light is electrically connected with the key switch, and a second end of the indicator light is electrically connected with a negative electrode of the power supply.
Preferably, the distance between the position of the indicator light and the key switch is less than 5 centimeters.
Preferably, the indicator light is an LED light.
The utility model discloses following beneficial effect has: the utility model discloses a cooperation between gas identification circuit, signal conditioning circuit, transistor switch circuit, voice circuit, signal amplification circuit, speaker, key switch and the power works as when gas identification circuit discerns the target harmful gas, the output recognition result makes transistor switch circuit opens, so that voice circuit sends voice signal for the speaker to send alarm signal for the staff, thereby guaranteed staff's property safety. In addition, the circuit also has the advantages of simple structure and low cost.
Drawings
Fig. 1 is a circuit diagram of the harmful gas monitoring and early warning circuit of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.
Referring to fig. 1, the present invention provides a harmful gas monitoring and early warning circuit, which includes a gas identification circuit 1, a signal conditioning circuit 2, a transistor switch circuit 3, a voice circuit 4, a signal amplification circuit 5, a speaker BP, a key switch K and a power supply Vcc, wherein the gas identification circuit 1 is electrically connected to the transistor switch circuit 3 and the key switch K for identifying harmful gas and outputting an identification signal to the signal conditioning circuit 2. The signal adjusting circuit 2 is electrically connected with the transistor switch circuit 3, and is used for adjusting the identification signal and outputting the identification signal to the transistor switch circuit 3. The transistor switch circuit 3 is electrically connected with the voice circuit 4 and is used for controlling the voice circuit 4 to output voice signals to the signal amplification circuit 5. The signal amplifying circuit 5 is electrically connected with the loudspeaker BP and is used for driving the loudspeaker BP to make sound.
The signal regulating circuit 2 comprises a slide rheostat RP and a second resistor R2, wherein a first end of the slide rheostat RP is electrically connected with the key switch K, and a second end of the slide rheostat RP is electrically connected with a fourth electrode and a sixth electrode in the gas-sensitive resistor T. A first end of the second resistor R2 is electrically connected to the sliding resistor RP, and a second end of the second resistor R2 is electrically connected to the transistor switch circuit 3.
The transistor switch circuit 3 includes a second capacitor C2, a diode D, a first triode Q1, and a third resistor R3, wherein a first end of the second capacitor C2 is electrically connected to the key switch K, and a second end of the second capacitor C2 is electrically connected to the first end of the diode D and the second resistor R2. The second end of the diode D is electrically connected to the base of the first transistor Q1. The emitter of the first transistor Q1 is electrically connected to the key switch K, and the collector of the first transistor Q1 is electrically connected to the first end of the third resistor R3. The second end of the third resistor R3 is electrically connected to the negative terminal of the power supply Vcc. Through the cooperation of the second resistor R2 and the second capacitor C2, when the key switch K is turned on and power starts to be supplied, the emitter junction of the diode D and the emitter of the first transistor Q1 is kept voltage-free and is in a cut-off state. And when the second capacitor C2 is fully charged, formal detection is carried out, so that the false detection of the gas-sensitive resistor T is avoided.
The voice circuit 4 comprises a fourth resistor R4, a third capacitor C3 and a voice chip U, the first end of the fourth resistor R4 is electrically connected with the key switch K, the second end of the fourth resistor R4 is electrically connected with the first pin of the voice chip U, the first end of the third capacitor C3 is electrically connected with the first pin of the voice chip U and the second end of the fourth resistor R4, and the second end of the third capacitor C3 is electrically connected with the negative electrode of the power supply Vcc.
The signal amplifying circuit 5 comprises a second transistor Q2, a collector of the second transistor Q2 is electrically connected to the speaker BP, a base of the second transistor Q2 is electrically connected to the fourth pin of the voice chip U, and an emitter of the second transistor Q2 is electrically connected to a negative electrode of the power supply Vcc.
The harmful gas monitoring and early warning circuit further comprises an indicator light L, wherein a first end of the indicator light L is electrically connected with the key switch K, and a second end of the indicator light L is electrically connected with a negative electrode of the power supply Vcc. The distance between the position of the indicator light L and the key switch K is less than 5 cm, so that the position of the key switch K can be well indicated. Preferably, the indicator light L is an LED light, so that energy is saved.
To sum up, the utility model discloses a cooperation between gas identification circuit 1, signal conditioning circuit 2, transistor switch circuit 3, voice circuit 4, signal amplification circuit 5, speaker BP, key switch K and the power Vcc works as when gas identification circuit 1 discerns the target harmful gas, output recognition result makes transistor switch circuit 3 opens, so that voice circuit 4 gives voice signal speaker BP to give staff sends alarm signal, thereby guaranteed staff's property safety. In addition, the circuit also has the advantages of simple structure and low cost.
The harmful gas monitoring and early warning circuit provided by the utility model is introduced in detail, and the principle and the implementation mode of the utility model are explained by applying a specific example, and the explanation of the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. To sum up, this description content only does the embodiment of the utility model, not therefore the restriction the patent scope of the utility model, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing was done, or directly or indirectly use in other relevant technical field, all the same reason is included in the patent protection scope of the utility model, should not be understood as right the utility model discloses a restriction.
Claims (9)
1. A harmful gas monitoring and early warning circuit is characterized by comprising a gas identification circuit, a signal regulating circuit, a transistor switch circuit, a voice circuit, a signal amplifying circuit, a loudspeaker, a key switch and a power supply, wherein the gas identification circuit is electrically connected with the transistor switch circuit and the key switch and is used for identifying harmful gas and outputting an identification signal to the signal regulating circuit; the signal adjusting circuit is electrically connected with the transistor switch circuit and is used for adjusting the identification signal and outputting the identification signal to the transistor switch circuit; the transistor switch circuit is electrically connected with the voice circuit and is used for controlling the voice circuit to output a voice signal to the signal amplification circuit; the signal amplification circuit is electrically connected with the loudspeaker and is used for driving the loudspeaker to make sound.
2. The harmful gas monitoring and early warning circuit according to claim 1, wherein the gas recognition circuit comprises a first capacitor, a first resistor, and a gas-sensitive resistor, the gas-sensitive resistor is provided with a first electrode, a second electrode, a third electrode, a fourth electrode, a fifth electrode, and a sixth electrode, a first end of the first capacitor is electrically connected with the key switch, and a second end of the first capacitor is electrically connected with the first electrode, the third electrode, and a power supply in the gas-sensitive resistor; the first end of the first resistor is electrically connected with the key switch, the second end of the first resistor is electrically connected with the second end of the gas-sensitive resistor, the fourth electrode and the fifth electrode of the gas-sensitive resistor are electrically connected with the signal regulating circuit, and the fifth electrode of the gas-sensitive resistor is electrically connected with the negative electrode of the power supply.
3. The harmful gas monitoring and early warning circuit according to claim 2, wherein the signal regulating circuit comprises a slide rheostat and a second resistor, a first end of the slide rheostat is electrically connected with the key switch, and a second end of the slide rheostat is electrically connected with a fourth electrode and a sixth electrode in the gas sensitive resistor; the first end of the second resistor is electrically connected with the slide rheostat, and the second end of the second resistor is electrically connected with the transistor switch circuit.
4. The harmful gas monitoring and early warning circuit according to claim 3, wherein the transistor switch circuit comprises a second capacitor, a diode, a first triode and a third resistor, a first end of the second capacitor is electrically connected with the key switch, and a second end of the second capacitor is electrically connected with a first end of the diode and the second resistor; the second end of the diode is electrically connected with the base electrode of the first triode; an emitting electrode of the first triode is electrically connected with the key switch, and a collecting electrode of the first triode is electrically connected with a first end of the third resistor; and the second end of the third resistor is electrically connected with the negative pole of the power supply.
5. The harmful gas monitoring and early warning circuit according to claim 4, wherein the voice circuit comprises a fourth resistor, a third capacitor and a voice chip, a first end of the fourth resistor is electrically connected to the key switch, a second end of the fourth resistor is electrically connected to a first pin of the voice chip, a first end of the third capacitor is electrically connected to the first pin of the voice chip and a second end of the fourth resistor, and a second end of the third capacitor is electrically connected to the negative electrode of the power supply.
6. The harmful gas monitoring and warning circuit of claim 5, wherein the signal amplifying circuit comprises a second triode, a collector of the second triode is electrically connected with the speaker, a base of the second triode is electrically connected with the fourth pin of the voice chip, and an emitter of the second triode is electrically connected with a cathode of the power supply.
7. The harmful gas monitoring and warning circuit according to claim 1, further comprising an indicator light, wherein a first end of the indicator light is electrically connected to the key switch, and a second end of the indicator light is electrically connected to a negative electrode of the power supply.
8. The harmful gas monitoring and early warning circuit of claim 7, wherein the position of the indicator light is less than 5 cm away from the key switch.
9. The harmful gas monitoring and early warning circuit according to claim 7, wherein the indicator light is an LED light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921801050.4U CN212008396U (en) | 2019-10-24 | 2019-10-24 | Harmful gas monitoring and early warning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921801050.4U CN212008396U (en) | 2019-10-24 | 2019-10-24 | Harmful gas monitoring and early warning circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212008396U true CN212008396U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921801050.4U Active CN212008396U (en) | 2019-10-24 | 2019-10-24 | Harmful gas monitoring and early warning circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212008396U (en) |
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2019
- 2019-10-24 CN CN201921801050.4U patent/CN212008396U/en active Active
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