CN103324226A - Overvoltage protection type telemetering terminal - Google Patents
Overvoltage protection type telemetering terminal Download PDFInfo
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- CN103324226A CN103324226A CN2013102662789A CN201310266278A CN103324226A CN 103324226 A CN103324226 A CN 103324226A CN 2013102662789 A CN2013102662789 A CN 2013102662789A CN 201310266278 A CN201310266278 A CN 201310266278A CN 103324226 A CN103324226 A CN 103324226A
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- resistance
- comparer
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- overpressure
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Abstract
The invention discloses an overvoltage protection type telemetering terminal which comprises a central processing unit, a wireless network card, a comparator, a resistor R1 and a resistor R2. An output end of each of the wireless network card and the comparator is connected to the central processing unit. The resistor R1 which is grounded is serially connected with the resistor R2 which is connected with a power supply. Two ends of the resistor R1 are connected between two input ends of the comparator. Due to the fact that the comparator for detecting voltage variation is connected between the power supply and the central processing unit, operation of circuits can be controlled, and damage, caused by overvoltage, of the telemetering terminal is prevented.
Description
Technical field
The present invention relates to the Remote field, be specifically related to overpressure-proof type telemetry terminal system machine.
Background technology
Telemetry terminal system is a kind of a kind of equipment of connecting object change system based on control message, is widely used in that every field comprises that remote monitoring, network remote pumping plant, the monitoring of hydrology water conservancy and the control of petroleum gas, colliery scene monitoring are used, the warning of outdoor warning horn, federal signal provide, power domain and aviation field etc.Wherein be used for the telemetry terminal system machine of water conservancy monitoring and geology monitoring, can realize sensing data is gathered, be uploaded to by various communication networking models and compile central station, central station carries out the early warning service with carry out the model calculation according to the data of compiling.Central station can carry out long-range trick survey, Remote configuration, remote maintenance to remote terminal.Telemetry terminal system needs the outside that it is powered usually, and the outside electric power that provides situation fluctuated occurs along with increasing or reducing of consumer probably, and this unsettled voltage is easy to cause the damage of telemetry terminal system.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, and overpressure-proof type telemetry terminal system machine is provided, and inserts comparer between power supply and central processing unit, is used for the variation of detecting voltage, and the operation of control circuit prevents excessive voltage damage telemetry terminal system.
For solving above-mentioned technical matters, the present invention is by the following technical solutions: overpressure-proof type telemetry terminal system machine, comprise central processing unit, wireless network card, comparer, resistance R 1 and resistance R 2, the output terminal of described wireless network card and comparer all is connected on the central processing unit; Described resistance R 1 and resistance R 2 are connected in series, resistance R 1 ground connection, and resistance R 2 connects power supply, and resistance R 1 two ends wherein also are connected between two input ends of comparer.
Described comparer is voltage comparator.
The model of described comparer is LM324.
Described central processing unit connects RTC real-time clock and FLASH storer.
The model of described RTC real-time clock is DS1302.
Described wireless network card is connected with antenna.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention inserts comparer between power supply and central processing unit, can amplify the very little differential signal of input end, and drive output switches to one in two output states.When the voltage of input end when being certain, another input terminal voltage is if be higher than reference voltage, output terminal is high level just, input end B voltage is if be lower than reference voltage, output terminal is low level then, utilizes this characteristic, and voltage comparator can be used for the variation of detecting voltage, control input voltage then, prevent that excessive voltage source from causing damage through central processing unit.
2, the present invention is provided with wireless network card, has saved the wiring of trouble, also can utilize wireless network to carry out long-range data and transmit.
Description of drawings
Fig. 1 is schematic diagram of the present invention.
Embodiment
The present invention is further elaborated below in conjunction with accompanying drawing, and embodiments of the invention are not limited thereto.
Embodiment:
As shown in Figure 1, the present invention includes central processing unit, wireless network card, comparer, resistance R 1 and resistance R 2.The wireless network card of present embodiment and the output terminal of comparer all are connected on the central processing unit, and central processing unit connects RTC real-time clock and FLASH storer, and wireless network card is connected with antenna.Resistance R 1 and the resistance R 2 of present embodiment are connected in series, resistance R 1 ground connection, and resistance R 2 connects power supply, and resistance R 1 two ends wherein also are connected between two input ends of comparer.The comparer of present embodiment is voltage comparator, and the model of comparer is LM324, and the model of RTC real-time clock is DS1302, and the model of central processing unit is LX4F232H5QCFIGA3, and the wireless network card model is WL-167G.
Comparer detects the R1 both end voltage, and when supply voltage was too high, the electric current that R1 flows through was greater than certain value, and two input terminal voltage differences of comparer surpass threshold value, and the output signal upset prevents that too high voltage from flowing into central processing unit, surpasses rated voltage, causes damage.
Just can realize this invention as mentioned above.
Claims (6)
1. overpressure-proof type telemetry terminal system machine, it is characterized in that: comprise central processing unit, wireless network card, comparer, resistance R 1 and resistance R 2, the output terminal of described wireless network card and comparer all is connected on the central processing unit; Described resistance R 1 and resistance R 2 are connected in series, resistance R 1 ground connection, and resistance R 2 connects power supply, and resistance R 1 two ends wherein also are connected between two input ends of comparer.
2. overpressure-proof type telemetry terminal system machine according to claim 1, it is characterized in that: described comparer is voltage comparator.
3. overpressure-proof type telemetry terminal system machine according to claim 1 and 2, it is characterized in that: the model of described comparer is LM324.
4. overpressure-proof type telemetry terminal system machine according to claim 1 is characterized in that: described central processing unit connection RTC real-time clock and FLASH storer.
5. according to claim 1 or 3 described overpressure-proof type telemetry terminal system machines, it is characterized in that: the model of described RTC real-time clock is DS1302.
6. overpressure-proof type telemetry terminal system machine according to claim 1, it is characterized in that: described wireless network card is connected with antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102662789A CN103324226A (en) | 2013-06-28 | 2013-06-28 | Overvoltage protection type telemetering terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102662789A CN103324226A (en) | 2013-06-28 | 2013-06-28 | Overvoltage protection type telemetering terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103324226A true CN103324226A (en) | 2013-09-25 |
Family
ID=49193030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102662789A Pending CN103324226A (en) | 2013-06-28 | 2013-06-28 | Overvoltage protection type telemetering terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103324226A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740072A1 (en) * | 1995-04-28 | 1996-10-30 | STMicroelectronics S.r.l. | Method and circuit for detecting the presence of a spark in internal combustion engine |
| CN101309003A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Synthetic apparatus of anti-flashover and protection for low-voltage three phase asynchronous motor |
| US20120092800A1 (en) * | 2010-04-09 | 2012-04-19 | Ti-Hua Ko | Circuit for detecting over-voltage and over-current |
| CN102709883A (en) * | 2012-05-11 | 2012-10-03 | 东南大学 | Under-voltage protection circuit of switch power source |
| CN202797874U (en) * | 2012-07-03 | 2013-03-13 | 青岛海信移动通信技术股份有限公司 | Over-voltage protection circuit and mobile terminal |
-
2013
- 2013-06-28 CN CN2013102662789A patent/CN103324226A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740072A1 (en) * | 1995-04-28 | 1996-10-30 | STMicroelectronics S.r.l. | Method and circuit for detecting the presence of a spark in internal combustion engine |
| CN101309003A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Synthetic apparatus of anti-flashover and protection for low-voltage three phase asynchronous motor |
| US20120092800A1 (en) * | 2010-04-09 | 2012-04-19 | Ti-Hua Ko | Circuit for detecting over-voltage and over-current |
| CN102709883A (en) * | 2012-05-11 | 2012-10-03 | 东南大学 | Under-voltage protection circuit of switch power source |
| CN202797874U (en) * | 2012-07-03 | 2013-03-13 | 青岛海信移动通信技术股份有限公司 | Over-voltage protection circuit and mobile terminal |
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Application publication date: 20130925 |