CN211318360U - Indoor environment detection alarm device - Google Patents
Indoor environment detection alarm device Download PDFInfo
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- CN211318360U CN211318360U CN201922077124.0U CN201922077124U CN211318360U CN 211318360 U CN211318360 U CN 211318360U CN 201922077124 U CN201922077124 U CN 201922077124U CN 211318360 U CN211318360 U CN 211318360U
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Abstract
The utility model discloses an indoor environment detection alarm device, including sensing circuit, amplifier circuit and warning circuit, sensing circuit's signal outputThe end of the signal input end of the amplifying circuit is connected with the signal input end of the alarm circuit, and the signal output end of the amplifying circuit is connected with the signal input end of the alarm circuit. The utility model discloses a formaldehyde sensor, CO2A plurality of detection devices such as a sensor, a PM2.5 sensor, an acetaldehyde detector and the like carry out comprehensive detection on the indoor environment quality, and timely and effectively carry out early warning on factors such as formaldehyde, acetaldehyde and carbon dioxide concentration in the indoor environment which may harm human health, so that the safety of the indoor environment is ensured.
Description
Technical Field
The utility model relates to an environmental monitoring technical field, especially an indoor environment detection alarm device.
Background
Two thirds of the life of a person spends indoors, and the life and working time of modern people in indoor environment reaches 80% -90% of the whole day, so the quality of the indoor environment directly influences the health of people. In the current life and work, the indoor environment can be changed due to work activities of people and the like, the body of people who work or move in the room can be damaged and unknown due to the fact that the environment can not be monitored in real time, discomfort feelings such as dizziness can be caused, harmful substances such as formaldehyde and acetaldehyde can exist in the indoor environment, and irreparable damage can be caused to the body health of people for a long time.
SUMMERY OF THE UTILITY MODEL
For solving the problem existing in the prior art, the utility model provides an indoor environment detection alarm device, through formaldehyde sensor, CO2A plurality of detection devices such as a sensor, a PM2.5 sensor, an acetaldehyde detector and the like carry out comprehensive detection on the indoor environment quality, and timely and effectively carry out early warning on factors such as formaldehyde, acetaldehyde and carbon dioxide concentration in the indoor environment which may harm human health, so that the safety of the indoor environment is ensured.
The utility model adopts the technical proposal that:
the utility model provides an indoor environment detection alarm device, includes sensing circuit, amplifier circuit and warning circuit, sensing circuit's signal output part with amplifier circuit's signal input part is connected, amplifier circuit's signal output part with warning circuit's signal input part is connected.
When formaldehyde sensor, PM2.5 sensor, acetaldehyde detector, CO in sensing circuit2After the sensor detects that harmful substances such as formaldehyde and acetaldehyde exist in the indoor environment or the concentration of carbon dioxide in indoor air is too high or PM2.5 is too high, the harmful substances pass through the formaldehyde sensor, the PM2.5 sensor, the acetaldehyde detector and CO2Sensor detection equipment transmitting phase such as sensorThe received signal is amplified through the amplifying circuit according to the corresponding signal, the signal is enhanced and sent to the alarm circuit, and the alarm circuit gives an alarm to prompt people. Through the cooperation of sensing circuit and warning circuit, in time effectual monitoring to the indoor environment is reported to the police, reminds people, guarantees people's health and safety.
Further, the sensing circuit comprises a formaldehyde sensor, a PM2.5 sensor, an acetaldehyde detector and CO2The formaldehyde detector comprises a sensor, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor, wherein a first sensing circuit formed by connecting the formaldehyde sensor and the first capacitor in series, a second sensing circuit formed by connecting the PM2.5 sensor and the second capacitor, a third sensing circuit formed by connecting the acetaldehyde detector and the third capacitor, and the CO2A fourth sensing circuit consisting of a sensor and a fourth capacitor is connected with the first resistor in parallel to form a first parallel circuit; the second resistor, the fifth capacitor and the sixth capacitor are connected in series to form a first series circuit, and a third resistor connected with the sixth capacitor in parallel is arranged on the first series circuit; the current input end of the first series circuit is connected in series with the current output end of the first parallel circuit.
Through formaldehyde sensor, PM2.5 sensor, acetaldehyde detector, and CO2The sensor and other various sensing detection devices detect the indoor environment, can detect the concentration of formaldehyde, acetaldehyde and carbon dioxide, the air quality and the like comprehensively, can timely and effectively early warn the factors which possibly harm the human health such as the concentration of formaldehyde, acetaldehyde and carbon dioxide in the indoor environment, and can ensure the safety of the indoor environment.
Furthermore, the amplifying circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh capacitor, a sixth resistor and an operational amplifier, the third resistor is connected in series between the anode of the operational amplifier and the ground, the fourth resistor is connected in series between the cathode of the operational amplifier and the ground, the fifth resistor is connected in parallel with the operational amplifier, two ends of the fifth resistor are respectively connected with the cathode of the operational amplifier and the signal output end of the operational amplifier, the seventh capacitor is connected in parallel between the anode and the cathode of the operational amplifier, the signal output end of the operational amplifier is connected in series with the signal input end of a filter circuit formed by connecting the sixth resistor and the eighth capacitor in series, and the current output end of the filter circuit is connected with the current input end of the alarm circuit; the current output end of the first series circuit is connected with the anode of the operational amplifier in series.
The operational amplifier amplifies the induction signal sent by the induction circuit, so that the induction target signal is enhanced, and the accuracy of the detection signal is improved.
Further, the alarm circuit comprises a triode and a loudspeaker, the base of the triode is connected with the current output end of the filter circuit, the emitter of the triode is connected with the signal input end of the loudspeaker, the collector of the triode is connected with a 5V power supply, a seventh resistor is connected in parallel between the base of the triode and the collector, and one end of the loudspeaker is grounded.
The on-off of the loudspeaker is controlled through the triode to give an alarm, and the alarm device is simple in structure, low in cost and good in alarm effect.
The utility model has the advantages that:
1. by formaldehyde sensor, CO2The sensor, the PM2.5 sensor, the acetaldehyde detector and other detection equipment perform comprehensive detection on the indoor environment quality, timely and effectively perform early warning on factors such as the concentration of formaldehyde, acetaldehyde and carbon dioxide in the indoor environment, which may harm human health, and ensure the safety of the indoor environment;
2. the operational amplifier amplifies the induction signal sent by the induction circuit, so that the induction target signal is enhanced, and the accuracy of the detection signal is improved;
3. the filter circuit is arranged to filter the signals, so that the accuracy of signal transmission is ensured;
4. the on-off of the loudspeaker is controlled through the triode, the structure is simple, and the cost is low.
Drawings
Fig. 1 is a circuit diagram of an indoor environment detection alarm device according to an embodiment of the present invention.
Description of reference numerals:
1. a sensing circuit; 1-1, a formaldehyde sensor; 1-2, PM2.5 sensors; 1-3, an acetaldehyde detector; 1-4, CO2A sensor; 2. an amplifying circuit; 3. an alarm circuit; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; c8, an eighth capacitor; a1, an operational amplifier; q1, triode; BL, speaker.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, the indoor environment detection alarm device includes a sensing circuit 1, an amplifying circuit 2 and an alarm circuit 3, wherein a signal output end of the sensing circuit 1 is connected with a signal input end of the amplifying circuit 2, and a signal output end of the amplifying circuit 2 is connected with a signal input end of the alarm circuit 3.
When the formaldehyde sensor 1-1, the PM2.5 sensor 1-2, the acetaldehyde detector 1-3 and the CO2 sensor 1-4 in the sensing circuit 1 detect that harmful substances such as formaldehyde and acetaldehyde exist in indoor environment or carbon dioxide concentration in indoor air is too high or PM2.5 is too high, sensing detection equipment such as the formaldehyde sensor 1-1, the PM2.5 sensor 1-2, the acetaldehyde detector 1-3 and the CO2 sensor 1-4 send corresponding signals, the received signals are amplified through the amplifying circuit 2, the signals are enhanced and sent to the alarm circuit 3, and the alarm circuit 3 gives an alarm to prompt people. Through the cooperation of sensing circuit 1 and warning circuit 3, in time effectual monitoring to the indoor environment is reported to the police, reminds people, guarantees people's health and safety.
In one embodiment, as shown in fig. 1, the sensing circuit 1 includes a formaldehyde sensor 1-1, a PM2.5 sensor 1-2, an acetaldehyde detector 1-3, a CO2 sensor 1-4, a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6, the formaldehyde sensor 1-1 is connected in series with the first capacitor C1 to form a first sensing circuit, the PM2.5 sensor 1-2 is connected in series with the second capacitor C2 to form a second sensing circuit, the acetaldehyde detector 1-3 is connected in series with the third capacitor C3 to form a third sensing circuit, the CO2 sensor 1-4 is connected in parallel with the fourth capacitor C4 to form a fourth sensing circuit, and the first resistor R1 are connected in parallel to form a first connection circuit; the second resistor R2, the fifth capacitor C5 and the sixth capacitor C6 are connected in series to form a first series circuit, and a third resistor R3 connected with the sixth capacitor C6 in parallel is arranged on the first series circuit; the current input end of the first series circuit is connected in series with the current output end of the first parallel circuit.
The formaldehyde sensor 1-1, the PM2.5 sensor 1-2, the acetaldehyde detector 1-3, the CO2 sensor 1-4 and other various sensing detection devices are used for detecting the indoor environment, the concentration of formaldehyde, acetaldehyde and carbon dioxide, the air quality and the like can be comprehensively detected, the early warning is timely and effectively carried out on the factors such as the concentration of formaldehyde, acetaldehyde and carbon dioxide in the indoor environment, which are possibly harmful to human health, and the safety of the indoor environment is ensured.
In one embodiment, as shown in fig. 1, the amplifying circuit 2 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh capacitor C7, a sixth resistor R6 and an operational amplifier a1, the third resistor R3 is connected in series between the anode of the operational amplifier A1 and ground, the fourth resistor R4 is connected in series between the cathode of the operational amplifier A1 and ground, the fifth resistor R5 is connected in parallel with the operational amplifier A1, two ends of the fifth resistor R5 are respectively connected with the cathode of the operational amplifier A1 and the signal output end of the operational amplifier A1, the seventh capacitor C7 is connected in parallel between the positive electrode and the negative electrode of the operational amplifier A1, the signal output end of the operational amplifier A1 is connected in series with the signal input end of a filter circuit formed by connecting a sixth resistor R6 and an eighth capacitor C8 in series, and the current output end of the filter circuit is connected with the current input end of the alarm circuit 3; the current output terminal of the first series circuit is connected in series with the anode of the operational amplifier a 1.
The sense signal sent from the sensor circuit 1 is amplified by the operational amplifier a1, and the sense target signal is enhanced, thereby increasing the accuracy of the detection signal.
In one embodiment, as shown in fig. 1, the alarm circuit 3 includes a transistor Q1 and a speaker BL, a base of the transistor Q1 is connected to the current output terminal of the filter circuit, an emitter of the transistor Q1 is connected to the signal input terminal of the speaker BL, a collector of the transistor Q1 is connected to the 5V power supply, a seventh resistor R7 is connected in parallel between the base and the collector of the transistor Q1, and one end of the speaker BL is grounded.
The on-off of the loudspeaker BL is controlled through the triode Q1 to give an alarm, and the alarm device is simple in structure, low in cost and good in alarm effect.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (4)
1. The indoor environment detection alarm device is characterized by comprising a sensing circuit, an amplifying circuit and an alarm circuit, wherein the signal output end of the sensing circuit is connected with the signal input end of the amplifying circuit, and the signal output end of the amplifying circuit is connected with the signal input end of the alarm circuit.
2. The indoor environment detection alarm device of claim 1, wherein the sensing circuit comprises a formaldehyde sensor, a PM2.5 sensor, an acetaldehyde detector, and CO2The formaldehyde sensor comprises a sensor, a first resistor, a second resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor, wherein a first sensing circuit formed by connecting the formaldehyde sensor and the first capacitor in series and a second sensing circuit formed by connecting the PM2.5 sensor and the second capacitor in seriesA third sensing circuit consisting of the acetaldehyde detector and a third capacitor, and the CO2A fourth sensing circuit consisting of a sensor and a fourth capacitor is connected with the first resistor in parallel to form a first parallel circuit; the second resistor, the fifth capacitor and the sixth capacitor are connected in series to form a first series circuit, and a third resistor connected with the sixth capacitor in parallel is arranged on the first series circuit; the current input end of the first series circuit is connected in series with the current output end of the first parallel circuit.
3. The indoor environment detection alarm device of claim 2, wherein the amplifying circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh capacitor, a sixth resistor and an operational amplifier, the third resistor is connected between the anode of the operational amplifier and the ground in series, the fourth resistor is connected between the cathode of the operational amplifier and the ground in series, the fifth resistor is connected with the operational amplifier in parallel, two ends of the fifth resistor are respectively connected with the cathode of the operational amplifier and the signal output end of the operational amplifier, the seventh capacitor is connected between the positive electrode and the negative electrode of the operational amplifier in parallel, the signal output end of the operational amplifier is connected with the signal input end of a filter circuit formed by connecting the sixth resistor and the eighth capacitor in series, and the current output end of the filter circuit is connected with the current input end of the alarm circuit; the current output end of the first series circuit is connected with the anode of the operational amplifier in series.
4. The indoor environment detection alarm device according to claim 3, wherein the alarm circuit comprises a triode and a loudspeaker, a base of the triode is connected with the current output end of the filter circuit, an emitter of the triode is connected with the signal input end of the loudspeaker, a collector of the triode is connected with a 5V power supply, a seventh resistor is connected between the base and the collector of the triode in parallel, and one end of the loudspeaker is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077124.0U CN211318360U (en) | 2019-11-27 | 2019-11-27 | Indoor environment detection alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077124.0U CN211318360U (en) | 2019-11-27 | 2019-11-27 | Indoor environment detection alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211318360U true CN211318360U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922077124.0U Active CN211318360U (en) | 2019-11-27 | 2019-11-27 | Indoor environment detection alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211318360U (en) |
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2019
- 2019-11-27 CN CN201922077124.0U patent/CN211318360U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220309 Address after: No. 306, unit 2, building 2, No. 6, Dongsheng Guangdu Avenue, Shuangliu County, Chengdu, Sichuan 610299 Patentee after: Yang Xueli Address before: 611200 No. 716, Chuangye Road, Chongzhou Economic Development Zone, Chengdu, Sichuan Patentee before: Sichuan jinqili Furniture Co.,Ltd. |
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| TR01 | Transfer of patent right |