CN102288924A - Circuit and method for monitoring fault of infrared LED (light-emitting diode) - Google Patents
Circuit and method for monitoring fault of infrared LED (light-emitting diode) Download PDFInfo
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- CN102288924A CN102288924A CN2011102622547A CN201110262254A CN102288924A CN 102288924 A CN102288924 A CN 102288924A CN 2011102622547 A CN2011102622547 A CN 2011102622547A CN 201110262254 A CN201110262254 A CN 201110262254A CN 102288924 A CN102288924 A CN 102288924A
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Abstract
The invention relates to a circuit and a method for monitoring a fault of an infrared LED (light-emitting diode). The method comprises the following steps that: resistors R1 and R2 in the circuit for monitoring the fault of the infrared LED carry out partial pressure sampling on a voltage between a ULED end and an earth end of an LED driving circuit to obtain a voltage signal and the voltage signal is transmitted to an IO (input output) port of a microprocessor; when a voltage of a power supply input end is risen, a voltage stabilizing diode D1 takes a protecting effect on the IO port of the microprocessor; when the infrared LED is closed, the microprocessor identifies the signal as a logical high level; when the infrared LED is opened, the microprocessor identifies the signal as a logical low level; and when the connection between a lead wire and a wafer inside the infrared LED is switched off, the IO port of the microprocessor is in a logical low level state so as to judge whether the infrared LED has the fault or not and visually display state information of the infrared LED through a monitor. Due to the adoption of the circuit and the method for monitoring the fault of the infrared LED, the limitation of a visual detection method for the infrared LED is effectively avoided and the fault is conveniently eliminated and detected, so that the repair and maintenance cost of equipment is reduced.
Description
Technical field
The present invention relates to the intelligent video monitoring technical field, particularly be applied to the infrared LED fault monitoring circuit and the method for safety monitoring, infrared ball monopod video camera and intelligent sphere monopod video camera.
Background technology
The applied environment complexity of infrared ball machine, infrared night vision poor effect in some cases, can not satisfy client's demand, cause the dissatisfactory reason of infrared effect to have multiple, such as infrared power parameter is set problem is arranged, it is heavier to monitor on-the-spot fog, and video camera itself has problems or infrared lamp breaks down or the like.And can only be by range estimation to infrared lamp failure judgment common practice at present.
There are many difficulties undoubtedly for this detection method of ball machine that is installed to engineering site, one, the ball machine is may the installation site higher, visual range is far away excessively; Two, daytime, ambient light can't be estimated more by force; Three, infrared light power is very strong, and range estimation damages eye easily.Therefore, the on-the-spot ball machine infrared LED malfunction monitoring that is installed on the higher position is shown important especially.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at prior art, at the problems referred to above, provide a kind of infrared LED fault monitoring circuit to be installed in the ball machine, make the ball machine increase infrared LED malfunction monitoring function, the user does not need to estimate infrared lamp when judging whether infrared LED exists fault, only need open ball machine menu specific items by opertaing device, the ball machine just can be monitored the state of infrared LED, and testing result is shown on the video image.
The present invention realizes by such technical scheme: the infrared LED fault monitoring circuit, it is characterized in that, and constitute by microprocessor, voltage sampling circuit; Described voltage sampling circuit is made up of resistance R 1, resistance R 2 and voltage stabilizing diode D1, series resistor R1 again after resistance R 2 and the voltage stabilizing diode D1 parallel connection; The circuit node that is connected by resistance R 1, resistance R 2 and voltage stabilizing diode D1 is connected with the microprocessor input port, and an end of resistance R 1 connects the U of infrared LED driving circuit
LEDEnd, an end of resistance R 2 connects the earth terminal of infrared LED driving circuit; The output end of microprocessor mouth connects ball machine host circuit.
The infrared LED fault monitoring method is characterized in that, comprises the steps:
Step 1: by the resistance R in the infrared LED fault monitoring circuit 1, R2 to led drive circuit U
LEDVoltage carries out the dividing potential drop sampling between end and the earth terminal, obtains voltage signal and is transferred to microprocessor IO mouth, works as U
LEDDuring rising, voltage stabilizing diode D1 plays a protective role to microprocessor IO mouth;
Step 2: when infrared LED is closed, because the pressure drop of infrared LED two ends is very little, U
LEDNear VCC, then the signal after resistance R 1, R2 dividing potential drop is identified as logic high by microprocessor; When infrared LED was opened, it is big that the pressure drop of infrared LED two ends becomes, U
LEDStep-down, the signal after resistance R 1, R2 dividing potential drop is identified as logic low by microprocessor; Connection between infrared LED inner lead and wafer disconnects, and promptly the infrared LED two pins is in off state, and this moment is the opening and closing infrared LED no matter, and microprocessor IO mouth all is a logic low state, can judge thus whether infrared LED has problems;
Step 3: ball machine host fault monitoring infrared LED status information, to the OSD module, microprocessor control OSD module is superimposed to the detection magnitude of voltage on the vision signal and by monitor with written form and is shown to the user microprocessor of host circuit with the infrared LED status information transmission.
Beneficial effect of the present invention: by the infrared LED status information is shown to the user intuitively by monitor, avoided the limitation of range estimation infrared LED detection method effectively, made things convenient for the investigation of fault, thereby reduced the cost of maintenance of equipment and maintenance.
Description of drawings
Fig. 1, infrared LED fault monitoring circuit structural drawing.
Embodiment
For a more clear understanding of the present invention, describe the present invention in conjunction with the accompanying drawings and embodiments in detail:
As shown in Figure 1, the infrared LED fault monitoring circuit is made of microprocessor, voltage sampling circuit; Voltage sampling circuit is made up of resistance R 1, resistance R 2 and voltage stabilizing diode D1, series resistor R1 again after resistance R 2 and the voltage stabilizing diode D1 parallel connection; The circuit node that is connected by resistance R 1, resistance R 2 and voltage stabilizing diode D1 is connected with the microprocessor input port, and an end of resistance R 1 connects infrared LED driving circuit U
LEDEnd, an end of resistance R 2 connects the earth terminal of infrared LED driving circuit; The output end of microprocessor mouth connects ball machine host circuit.
According to the above description, can realize the solution of the present invention in conjunction with art technology.
Claims (2)
1. the infrared LED fault monitoring circuit is characterized in that, is made of microprocessor, voltage sampling circuit; Described voltage sampling circuit is made up of resistance R 1, resistance R 2 and voltage stabilizing diode D1, series resistor R1 again after resistance R 2 and the voltage stabilizing diode D1 parallel connection; The circuit node that is connected by resistance R 1, resistance R 2 and voltage stabilizing diode D1 is connected with the microprocessor input port, and an end of resistance R 1 connects the U of infrared LED driving circuit
LEDEnd, an end of resistance R 2 connects the earth terminal of infrared LED driving circuit; The output end of microprocessor mouth connects ball machine host circuit.
2. the infrared LED fault monitoring method is characterized in that, comprises the steps:
Step 1: by the resistance R in the infrared LED fault monitoring circuit 1, R2 to led drive circuit U
LEDVoltage carries out the dividing potential drop sampling between end and the earth terminal, obtains voltage signal and is transferred to microprocessor IO mouth, works as U
LEDDuring rising, voltage stabilizing diode D1 plays a protective role to microprocessor IO mouth;
Step 2: when infrared LED is closed, because the pressure drop of infrared LED two ends is very little, U
LEDNear VCC, then the signal after resistance R 1, R2 dividing potential drop is identified as logic high by microprocessor; When infrared LED was opened, it is big that the pressure drop of infrared LED two ends becomes, U
LEDStep-down, the signal after resistance R 1, R2 dividing potential drop is identified as logic low by microprocessor; Connection between infrared LED inner lead and wafer disconnects, and promptly the infrared LED two pins is in off state, and this moment is the opening and closing infrared LED no matter, and microprocessor IO mouth all is a logic low state, can judge thus whether infrared LED has problems;
Step 3: ball machine host fault monitoring infrared LED status information, to the OSD module, microprocessor control OSD module is superimposed to the detection magnitude of voltage on the vision signal and by monitor with written form and is shown to the user microprocessor of host circuit with the infrared LED status information transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102622547A CN102288924A (en) | 2011-09-06 | 2011-09-06 | Circuit and method for monitoring fault of infrared LED (light-emitting diode) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102622547A CN102288924A (en) | 2011-09-06 | 2011-09-06 | Circuit and method for monitoring fault of infrared LED (light-emitting diode) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102288924A true CN102288924A (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102622547A Pending CN102288924A (en) | 2011-09-06 | 2011-09-06 | Circuit and method for monitoring fault of infrared LED (light-emitting diode) |
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| CN (1) | CN102288924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439672A (en) * | 2013-08-27 | 2013-12-11 | 上海德科电子仪表有限公司 | Circuit and method for detecting faults of alarm lamp of motormeter |
| CN105572605A (en) * | 2015-12-16 | 2016-05-11 | 浙江凯耀照明股份有限公司 | Infrared induction light fixture detection apparatus and detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800851A (en) * | 2010-03-23 | 2010-08-11 | 福州开发区鸿发光电子技术有限公司 | Intelligent high-speed ball with built-in variable-angle infrared illumination system |
| CN101937044A (en) * | 2010-09-21 | 2011-01-05 | 重庆三祥汽车电控系统有限公司 | Vehicular harness on-off detection equipment |
-
2011
- 2011-09-06 CN CN2011102622547A patent/CN102288924A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800851A (en) * | 2010-03-23 | 2010-08-11 | 福州开发区鸿发光电子技术有限公司 | Intelligent high-speed ball with built-in variable-angle infrared illumination system |
| CN101937044A (en) * | 2010-09-21 | 2011-01-05 | 重庆三祥汽车电控系统有限公司 | Vehicular harness on-off detection equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439672A (en) * | 2013-08-27 | 2013-12-11 | 上海德科电子仪表有限公司 | Circuit and method for detecting faults of alarm lamp of motormeter |
| CN105572605A (en) * | 2015-12-16 | 2016-05-11 | 浙江凯耀照明股份有限公司 | Infrared induction light fixture detection apparatus and detection method |
| CN105572605B (en) * | 2015-12-16 | 2018-04-06 | 浙江凯耀照明股份有限公司 | Infrared induction light fixture detection device and detection method |
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Application publication date: 20111221 |