CN2839620Y - Vehicle bottom repair work anti-personal casualty accident one-chip machine software or gate double-monitoring apparatus - Google Patents
Vehicle bottom repair work anti-personal casualty accident one-chip machine software or gate double-monitoring apparatus Download PDFInfo
- Publication number
- CN2839620Y CN2839620Y CN 200520115874 CN200520115874U CN2839620Y CN 2839620 Y CN2839620 Y CN 2839620Y CN 200520115874 CN200520115874 CN 200520115874 CN 200520115874 U CN200520115874 U CN 200520115874U CN 2839620 Y CN2839620 Y CN 2839620Y
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- CN
- China
- Prior art keywords
- chip machine
- chip microcomputer
- soft
- monitoring apparatus
- circuit
- 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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- Geophysics And Detection Of Objects (AREA)
Abstract
The utility model relates to a one-chip machine soft or gate double-monitoring apparatus for preventing personal casualty accident in vehicle bottom repair work, which belongs to the application field of the computer technology. The one-chip machine soft or gate double-monitoring apparatus comprises an ignition system control circuit, an infrared detection circuit, a pyroelectric detection circuit and an or gate control software. The utility model is characterized in that output ends of the infrared detection circuits and the pyroelectric detection circuit are respectively connected with an input end of a one-chip machine; the input end of the one-chip machine is connected with a switch tube and a relay to form the one-chip machine soft or gate double-monitoring apparatus. An ignition system is connected with a normally-closed contact. When a vehicle maintenance person works at the bottom, the ignition system is cut off by the normally-closed contact of the relay. When the vehicle maintenance person leaves the working area, the relay recovers the original stand-by control state. An indicator lamp is crossed in a power supply loop of a normally open contact for providing working signals. The utility model has the advantages that the one-chip machine soft or gate double-monitoring apparatus automatically cuts off the working loop of the ignition system when repair persons work at the bottom of a vehicle; the one-chip machine soft or gate double-monitoring apparatus avoids mistaken vehicle startup from resulting in the repair persons' personal casualty accident. The utility model also has the characteristics of double monitoring of an or gate circuit, and accurate control.
Description
Technical field the invention relates to a kind of circuit arrangement that monitor signal is provided, and particularly soft the or door dual-monitoring device of preventing nhuman casualty accident during repairing automobile bottom single-chip microcomputer belongs to the electronic technology application field.
Monitoring device before background technique the invention is respectively infrared monitor, pyroelectric monitor, but do not exist monitoring accuracy high and may provide mistake to survey the defective of signal.
The purpose of summary of the invention the invention provides the soft or door dual-monitoring device of preventing nhuman casualty accident during repairing automobile bottom single-chip microcomputer.
The invention solves the technological scheme that its technical problem adopts: comprise ignition system control circuit, infrared detection circuit, thermoelectricity testing circuit and or gate control software; The infrared observation circuit is connected with the single-chip microcomputer input end respectively with thermoelectricity observation circuit output terminal, and the single-chip microcomputer input end is connected with switching tube and relay, forms the soft or door double monitoring device of single-chip microcomputer.Ignition system is connected with normally-closed contact, and the tutorial light cross-under is in the normally opened contact power loop.Single-chip microcomputer or gate control software and SCM peripheral circuit are formed the soft or door double monitoring device of single-chip microcomputer jointly, replace hard OR circuit.
The beneficial effect of the invention is: the beneficial effect of the invention is to make the repairman when the operation of automobile bottom, automatic cut-out point ignition system work loop, guarantee that the automobile false tripping causes repairman's human casualty accident, and have the accurately characteristics of control of OR circuit double monitoring.
Description of drawings is described further the invention below in conjunction with accompanying drawing.
Fig. 1 is the electrical schematic diagram of the invention.
Embodiment is consulted Fig. 1.The invention is made up of pyroelectric sensor fresnel lens, low frequency bandpass amplifier, voltage comparator; High level signal by pyroelectric monitor output.
The low frequency signal that pyroelectric sensor output is faint is coupled to VT through C
1The common-emitter amplifier of forming amplifies operational amplifier A
1The further amplifying signal of low-pass amplifier and the voltage comparator A that constitute
2In-phase input end be connected, the reference potential of comparator is by the comparative voltage of R and RP dividing potential drop decision inverting input.Voltage comparator output terminal and switching tube VT
2Be connected.In the present embodiment, B selects SD02 type pyroelectric infrared sensor for use.Fresnel lens 7801 types, VT
1-VT
2With 9014, A
1, A
2Select a slice amplifier LM358N for use.
IC
1The pulse square wave voltage of output is added in infrarede emitting diode VD
2, VD
3Two ends, drive its towards periphery spatial emission go out modulated infrared light.Infrared reflection is gone back a part by infrared receiving tube VD
4Reception also is converted to the respective quadrature time variant voltage signal, through C
4, R
5Be coupled to amplifier IC
2After amplifying, again through C
5Be input to decoder IC
3Input end, the decoding after phase inverter VT
2The output high level.
The infrared observation circuit is connected with single-chip microcomputer input end I/O (1), I/O (2) respectively with thermoelectricity observation circuit output terminal, single-chip microcomputer output terminal I/O (3) and switching tube G and relay J
1Be connected.Ignition system and normally-closed contact J
1-2Be connected, the tutorial light cross-under is at normally opened contact J
1-1In the power loop.
The present embodiment single-chip microcomputer adopts the PIC12C508 8-bit microcontroller.
Claims (3)
1, the soft or door dual-monitoring device of preventing nhuman casualty accident during repairing automobile bottom single-chip microcomputer comprises that ignition system control circuit, infrared detection circuit, thermoelectricity testing circuit reach or gate control software; It is characterized in that the infrared observation circuit is connected with the single-chip microcomputer input end respectively with thermoelectricity observation circuit output terminal, the single-chip microcomputer input end is connected with switching tube and relay, forms the soft or door double monitoring device of single-chip microcomputer.
2, the soft or door dual-monitoring device of preventing nhuman casualty accident during repairing automobile bottom single-chip microcomputer according to claim 1 is characterized in that ignition system is connected with normally-closed contact, and the tutorial light cross-under is in the normally opened contact power loop.
3, the soft or door dual-monitoring device of preventing nhuman casualty accident during repairing automobile bottom single-chip microcomputer according to claim 1, it is characterized in that single-chip microcomputer or gate control software and SCM peripheral circuit form jointly single-chip microcomputer soft or the door double monitoring device, replace hard OR circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520115874 CN2839620Y (en) | 2005-10-31 | 2005-10-31 | Vehicle bottom repair work anti-personal casualty accident one-chip machine software or gate double-monitoring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520115874 CN2839620Y (en) | 2005-10-31 | 2005-10-31 | Vehicle bottom repair work anti-personal casualty accident one-chip machine software or gate double-monitoring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2839620Y true CN2839620Y (en) | 2006-11-22 |
Family
ID=37427604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520115874 Expired - Fee Related CN2839620Y (en) | 2005-10-31 | 2005-10-31 | Vehicle bottom repair work anti-personal casualty accident one-chip machine software or gate double-monitoring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2839620Y (en) |
-
2005
- 2005-10-31 CN CN 200520115874 patent/CN2839620Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |