CN202128611U - Automatic face shield alarm circuit - Google Patents
Automatic face shield alarm circuit Download PDFInfo
- Publication number
- CN202128611U CN202128611U CN201120144448U CN201120144448U CN202128611U CN 202128611 U CN202128611 U CN 202128611U CN 201120144448 U CN201120144448 U CN 201120144448U CN 201120144448 U CN201120144448 U CN 201120144448U CN 202128611 U CN202128611 U CN 202128611U
- Authority
- CN
- China
- Prior art keywords
- resistance
- resistor
- operational amplifier
- connects
- face shield
- 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
Links
- 230000006378 damage Effects 0.000 abstract description 4
- 230000004438 eyesight Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The utility model relates to the technique field of face shields, especially an automatic face shield alarm circuit, which comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, an operational amplifier U1, a single-chip microcomputer MCU, a triode Q3 and a light-emitting diode DS3. The resistor R1 is connected with the resistor R2 and the resistor R3 is connected with the resistor R4. The operational amplifier U1 is connected with the resistor R2 and the resistor R3. The operational amplifier U1 is connected with the single-chip microcomputer MCU. The single-chip microcomputer MCU is connected with a triode Q2. The triode Q2 is connected with the light-emitting diode DS3. The automatic face shield alarm circuit is a low-voltage alarm circuit. When the battery voltage of the circuit falls to as a certain degree, the light-emitting diode gives an alarm so as to remind a user to replace the battery timely. Therefore, the damage to the eyesight of the user caused by the shortage of the battery voltage is avoided.
Description
Technical field
This utility model relates to a kind of warning circuit, relates in particular to a kind of automatic mask warning circuit.
Background technology
At present; Face shield to be worn during known welding assembly in case arc light injury eyes and face; The eye-protecting optical filter that face shield is commonly used is commonly called as filter glass; Be difficult to see through filter glass during the not starting the arc and observe the position that is soldered, hand-held face shield commonly used and wear-type face shield bring inconvenience to striking slag behind the arc, also need a hands to take face shield on the handle though the protective eye lens of hand-held face shield keying button is arranged on; Though wear-type face shield protective eye lens open-close on-off is arranged on the electrode holders bakelite handle, need the automatic open close device to accomplish protective eye lens and open and close, the wear-type face shield needs battery supplied; If battery is not in time changed, cause and can't regulate, influence the visual field; Inconvenient operation has reduced work efficiency.
Summary of the invention
The technical problem that this utility model will solve is: the wear-type face shield needs battery supplied, if battery is not in time changed, causes and can't regulate, and influences the visual field, and inconvenient operation has reduced work efficiency, and a kind of automatic mask warning circuit is provided.
In order to overcome the defective that exists in the background technology; This utility model solves the technical scheme that its technical problem adopted: this automatic mask warning circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, operational amplifier U1, single-chip microprocessor MCU, audion Q2 and light emitting diode DS3; Said resistance R 1 connects resistance R 2; Resistance R 3 connects resistance R 4, and operational amplifier U1 connects resistance R 2 and resistance R 3, and operational amplifier U1 connects single-chip microprocessor MCU; Single-chip microprocessor MCU connects audion Q2, and audion Q2 connects light emitting diode DS3.
According to another embodiment of this utility model, comprise that further said operational amplifier U1 negative pole connects resistance R 3, the anodal resistance R 4 that connects of operational amplifier U1.
The beneficial effect of this utility model is: this automatic mask warning circuit is a kind of low pressure alarming circuit; When cell voltage dropped to a certain degree, light emitting diode can send warning, reminded the user in time to change battery; Can not answer undertension like this, and cause injury vision.
Description of drawings
Below in conjunction with accompanying drawing and embodiment this utility model is further specified.
Fig. 1 is the structural representation of this utility model.
The specific embodiment
Fig. 1 is the structural representation of this utility model; Comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, operational amplifier U1, single-chip microprocessor MCU, audion Q2 and light emitting diode DS3 among the figure, said resistance R 1 connects resistance R 2, and resistance R 3 connects resistance R 4; Operational amplifier U1 connects resistance R 2 and resistance R 3; Operational amplifier U1 connects single-chip microprocessor MCU, and single-chip microprocessor MCU connects audion Q2, and audion Q2 connects light emitting diode DS3.
Said operational amplifier U1 negative pole connects resistance R 3, the anodal resistance R 4 that connects of operational amplifier U1.
This automatic mask warning circuit is a kind of low pressure alarming circuit, and this low-voltage circuit environmental protection and energy-conservation is when cell voltage drops to a certain degree; Light emitting diode can send warning; Remind the user in time to change battery, can not answer undertension like this, and cause injury vision.
Claims (2)
1. automatic mask warning circuit; Comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, operational amplifier U1, single-chip microprocessor MCU, audion Q2 and light emitting diode DS3, it is characterized in that: said resistance R 1 connects resistance R 2, and resistance R 3 connects resistance R 4; Operational amplifier U1 connects resistance R 2 and resistance R 3; Operational amplifier U1 connects single-chip microprocessor MCU, and single-chip microprocessor MCU connects audion Q2, and audion Q2 connects light emitting diode DS3.
2. automatic mask warning circuit as claimed in claim 1 is characterized in that: said operational amplifier U1 negative pole connects resistance R 3, the anodal resistance R 4 that connects of operational amplifier U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120144448U CN202128611U (en) | 2011-05-10 | 2011-05-10 | Automatic face shield alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120144448U CN202128611U (en) | 2011-05-10 | 2011-05-10 | Automatic face shield alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202128611U true CN202128611U (en) | 2012-02-01 |
Family
ID=45517398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120144448U Expired - Fee Related CN202128611U (en) | 2011-05-10 | 2011-05-10 | Automatic face shield alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202128611U (en) |
-
2011
- 2011-05-10 CN CN201120144448U patent/CN202128611U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 213000, No. 13, No. 203, Chengdong business center, Qishuyan District, Jiangsu, Changzhou Patentee after: CHANGZHOU SHINE SCIENCE & TECHNOLOGY CO.,LTD. Address before: 213000, No. 13, No. 203, Chengdong business center, Qishuyan District, Jiangsu, Changzhou Patentee before: Changzhou Shine Science & Technology Co., Ltd. |
|
| 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: 20120201 Termination date: 20180510 |