CN207008835U - A kind of danger zone electronic alarm device - Google Patents
A kind of danger zone electronic alarm device Download PDFInfo
- Publication number
- CN207008835U CN207008835U CN201720911195.4U CN201720911195U CN207008835U CN 207008835 U CN207008835 U CN 207008835U CN 201720911195 U CN201720911195 U CN 201720911195U CN 207008835 U CN207008835 U CN 207008835U
- Authority
- CN
- China
- Prior art keywords
- triode
- electric capacity
- resistance
- inductance
- loudspeaker
- 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.)
- Expired - Fee Related
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- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
Abstract
The utility model discloses a kind of danger zone electronic alarm device, including battery, first resistor to the 5th resistance, the first triode to the 3rd triode, the first electric capacity to the 3rd electric capacity, crystal oscillator pipe, inductance, antenna and loudspeaker, when someone is close to hazardous area, the resonant frequency in loop between the frequency of oscillator signal and the second electric capacity, inductance can be made different, first triode level output signal raises suddenly, second triode turns on rapidly, the 3rd triode ON, the rapid sounding alarm of loudspeaker.Compared with prior art, the utility model uses electronic alarm, when someone is close, sends alarm automatically, practical and convenient, is more difficult to be neglected, and has the value of popularization and application.
Description
Technical field
It the utility model is related to safe electronic technical field, more particularly to a kind of danger zone electronic alarm device.
Background technology
Danger zone refers to the region that may generally assemble inflammable or explosion hazard gases, steam, dust or explosive, means logical
Chang Keneng assembles the region of inflammable or explosion hazard gases, steam, dust or explosive.In the prior art, danger zone uses mostly
Put up mark and play warning function, and identify sometimes easily carelessness, accordingly, there exist room for improvement.
Utility model content
The purpose of this utility model is that to solve the above problems and provides a kind of danger zone electronic alarm device.
The utility model is achieved through the following technical solutions above-mentioned purpose：
The utility model includes battery, first resistor to the 5th resistance, the first triode to the 3rd triode, the first electric capacity
To the 3rd electric capacity, crystal oscillator pipe, inductance, antenna and loudspeaker, the positive pole of battery while the first end with first resistor, the second electric capacity
First end, the first end of inductance, the colelctor electrode of the second triode connected with the first end of loudspeaker, the negative pole of battery simultaneously with
The first end of second resistance, the first end of 3rd resistor, the first end of the 3rd electric capacity, the first end of the 4th resistance and the three or three pole
The emitter stage connection of pipe, the first end of the first electric capacity are connected with the first end of antenna and crystal oscillator pipe simultaneously, and the second of the first electric capacity
End is connected with the base stage at the second end of first resistor, the second end of second resistance and the first triode simultaneously, the first triode
Emitter stage is connected with the second end of 3rd resistor and the second end of the 3rd electric capacity simultaneously, and the colelctor electrode of the first triode is simultaneously with the
Second end of two electric capacity, the second end of inductance, the base stage of the second triode connect with the second end of crystal oscillator pipe, the second triode
Emitter stage is connected with the first end of the 5th resistance and the second end of the 4th resistance simultaneously, the second end and the three or three pole of the 5th resistance
The base stage connection of pipe, the colelctor electrode of the 3rd triode and the second end of loudspeaker connect.
Specifically, first electric capacity and the second electric capacity are variable capacitance.
The beneficial effects of the utility model are：
The utility model is a kind of danger zone electronic alarm device, and compared with prior art, the utility model uses electronics
Warning, when someone is close, sends alarm automatically, practical and convenient, is more difficult to be neglected, and has the value of popularization and application.
Brief description of the drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1：The utility model include battery E, first resistor R1 to the 5th resistance R5, the first triode VT1 extremely
3rd triode VT3, the first electric capacity C1 to the 3rd electric capacity C3, crystal oscillator pipe HTD, inductance L, antenna TX and loudspeaker B, battery E's
Positive pole simultaneously with first resistor R1 first end, the second electric capacity C2 first end, inductance L first end, the second triode VT2
Colelctor electrode connects with loudspeaker B first end, battery E negative pole first end with second resistance R2,3rd resistor R3 simultaneously
First end, the 3rd electric capacity C3 first end, the 4th resistance R4 first end connect with the 3rd triode VT3 emitter stage, and first
Electric capacity C1 first end be connected with antenna TX and crystal oscillator pipe HTD first end simultaneously, the first electric capacity C1 the second end while with the
One resistance R1 the second end, second resistance R2 the second end connect with the first triode VT1 base stage, the first triode VT1's
Emitter stage is connected with 3rd resistor R3 the second end and the 3rd electric capacity C3 the second end simultaneously, the first triode VT1 colelctor electrode
Simultaneously with the second electric capacity C2 the second end, inductance L the second end, the second triode VT2 base stage and crystal oscillator pipe HTD the second end
Connection, the second triode VT2 emitter stage are connected with the 5th resistance R5 first end and the 4th resistance R4 the second end simultaneously, the
Five resistance R5 the second end is connected with the 3rd triode VT3 base stage, and the of the 3rd triode VT3 colelctor electrode and loudspeaker B
Two ends connect.
Specifically, the first electric capacity C1 and the second electric capacity C2 is variable capacitance.Inductance L is diameter 1mm enamel-covered wire
The demoulding of the circle of coiling 10 forms on diameter 10mm cylinder.
Operation principle of the present utility model is as follows：
Oscillating element is formed by crystal oscillator pipe HTD, the first triode VT1, the first electric capacity C1 to the 3rd electric capacity C3, frequency of oscillation
It is after the second electric capacity C2, inductance L resonant tank frequency-selectings, oscillator signal is defeated to the second triode VT2 for 3MHz.Two or three pole
Pipe VT2 plays impedance conversion and on-off action.
When normal, the first triode VT1 colelctor electrode output signals are weaker, the second triode VT2 cut-offs, the 3rd triode
VT3 ends, loudspeaker B not sounding.When someone is close to hazardous area, the frequency and the second electric capacity C2, inductance L of oscillator signal can be made
Between loop resonant frequency it is different, the first triode VT1 level output signals are raised suddenly, and the second triode VT2 is turned on rapidly, the
Three triode VT3 are turned on, the rapid sounding alarms of loudspeaker B.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (2)
- A kind of 1. danger zone electronic alarm device, it is characterised in that：Including battery, first resistor to the 5th resistance, the one or three pole The triodes of Guan Zhi tri-, the first electric capacity to the 3rd electric capacity, crystal oscillator pipe, inductance, antenna and loudspeaker, the positive pole of battery is simultaneously with the The first end of one resistance, the first end of the second electric capacity, the first end of inductance, the first of the colelctor electrode of the second triode and loudspeaker End connection, the negative pole of the battery first end with second resistance, the first end of 3rd resistor, the first end of the 3rd electric capacity, the simultaneously The first end of four resistance connects with the emitter stage of the 3rd triode, the first end of the first electric capacity simultaneously with antenna and crystal oscillator pipe the One end connects, the second end of the first electric capacity simultaneously with the second end of first resistor, the second end of second resistance and the first triode Base stage connection, the emitter stage of the first triode is connected with the second end of 3rd resistor and the second end of the 3rd electric capacity simultaneously, the The colelctor electrode of one triode simultaneously with the second end of the second electric capacity, the second end of inductance, the base stage of the second triode and crystal oscillator pipe The connection of the second end, the emitter stage of the second triode is connected with the first end of the 5th resistance and the second end of the 4th resistance simultaneously, Second end of the 5th resistance is connected with the base stage of the 3rd triode, and the colelctor electrode of the 3rd triode and the second end of loudspeaker connect Connect.
- 2. electronic alarm device in danger zone according to claim 1, it is characterised in that：First electric capacity and the second electric capacity It is variable capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911195.4U CN207008835U (en) | 2017-07-26 | 2017-07-26 | A kind of danger zone electronic alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720911195.4U CN207008835U (en) | 2017-07-26 | 2017-07-26 | A kind of danger zone electronic alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207008835U true CN207008835U (en) | 2018-02-13 |
Family
ID=61457423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720911195.4U Expired - Fee Related CN207008835U (en) | 2017-07-26 | 2017-07-26 | A kind of danger zone electronic alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207008835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011277A (en) * | 2019-03-10 | 2019-07-12 | 兰州理工大学技术工程学院 | A kind of electricity consumption load rated safety automatic controller |
-
2017
- 2017-07-26 CN CN201720911195.4U patent/CN207008835U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011277A (en) * | 2019-03-10 | 2019-07-12 | 兰州理工大学技术工程学院 | A kind of electricity consumption load rated safety automatic controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180213 Termination date: 20180726 |