CN202856309U - Power supply voltage monitoring circuit - Google Patents
Power supply voltage monitoring circuit Download PDFInfo
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- CN202856309U CN202856309U CN 201220521552 CN201220521552U CN202856309U CN 202856309 U CN202856309 U CN 202856309U CN 201220521552 CN201220521552 CN 201220521552 CN 201220521552 U CN201220521552 U CN 201220521552U CN 202856309 U CN202856309 U CN 202856309U
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- diode
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- voltage monitoring
- monitoring circuit
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Abstract
The utility model provides a power supply voltage monitoring circuit. In the circuit, a first resistor R127 is connected with the negative electrode of a first diode D35, a second resistor R58 is connected with the negative electrode of a second diode D36, the positive electrode of the first diode D35 is connected with the positive electrode of the second diode D36, a third resistor R69 is connected with the negative electrode of a third diode D37, the positive electrode of the third diode D37 is connected with the positive electrode of the first diode D35, and the first resistor R127, the second resistor R58 and the third resistor R69 are respectively connected to a second pin of a first comparator U5. The power supply voltage monitoring circuit provided by the utility model has the advantages of high reliability, good versatility and high flexibility.
Description
Technical field
The present invention relates to airborne flight control system field, relate in particular to a kind of airborne flight control system field power voltage monitoring circuit.
Background technology
Be accompanied by the development of science and technology, the power supply of airborne flight control system not only will provide satisfactory output voltage, and will monitor its voltage that provides.According to the requirement of model task, the development power voltage monitoring circuit is monitored the output voltage of power module.
The utility model content
In order to solve existing technical problem in the background technology, the utility model proposes a kind of power voltage monitoring circuit, reliability is high, versatility good, flexibility is high.
Technical solution of the present utility model is: power voltage monitoring circuit, it is characterized in that: the first resistance R 127 is connected with the negative pole of the first diode D35 in the described circuit, the second resistance R 58 is connected with the negative pole of the second diode D36, the positive pole of described the first diode D35 is connected with the positive pole of the second diode D36, the 3rd resistance R 69 is connected with the negative pole of the 3rd diode D37, the positive pole of described the 3rd diode D37 is connected with the positive pole of the first diode D35, and the first resistance R 127, the second resistance R 58, the 3rd resistance R 69 access respectively 2 pin of the first comparator U5.
Foregoing circuit also comprises the 4th resistance R 70 and the 4th diode D38, and the negative pole of the 4th diode D38 is connected with the positive pole of the first diode D35,3 pin of described the 4th resistance R 70 accesses the first comparator U5.
Foregoing circuit also comprises photoelectrical coupler U1, and described photoelectrical coupler U1 is connected with the first comparator U5.
The end of above-mentioned photoelectrical coupler U1 connects accessory power supply C94, and described accessory power supply C94 connects the second comparator U6.
Above-mentioned the second comparator U6 connects respectively the first triode Q11 and the second triode Q12.
Power voltage monitoring circuit of the present utility model be aircraft flight control computer power supply+15V ,-15V, 10V and+5V voltage monitors, four road output voltages+15V ,-15V, 10V and+5V occurs unusual, this circuit is monitored it, self closes output power module, protection calculation machine system; This circuit has advantages of that reliability is high, versatility good and flexibility is high.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Embodiment
Referring to Fig. 1, the utility model proposes a kind of power voltage monitoring circuit, the first resistance R 127 is connected with the negative pole of the first diode D35 in the circuit, the second resistance R 58 is connected with the negative pole of the second diode D36, the positive pole of the first diode D35 is connected with the positive pole of the second diode D36, the 3rd resistance R 69 is connected with the negative pole of the 3rd diode D37, the positive pole of the 3rd diode D37 is connected with the positive pole of the first diode D35, and the first resistance R 127, the second resistance R 58, the 3rd resistance R 69 access respectively 2 pin of the first comparator U5.Circuit also comprises the 4th resistance R 70 and the 4th diode D38, and the negative pole of the 4th diode D38 is connected with the positive pole of the first diode D35,3 pin of the 4th resistance R 70 accesses the first comparator U5.Photoelectrical coupler U1 is connected with the first comparator U5; The end of photoelectrical coupler U1 connects accessory power supply C94, and accessory power supply C94 connects the second comparator U6, and the second comparator U6 connects respectively the first triode Q11 and the second triode Q12.
The course of work is specific as follows :+15V is by the first resistance R 127 and the first diode D35; + 5V is by the second resistance R 58 and the second diode D36; 10V is by the 3rd resistance R 69 and the 3rd diode D37; be added to respectively 2 pin of the first comparator U5A;-15V is added to 3 pin of U5A by the 4th resistance R 70 and the 4th diode D38; if+15V; + 5V; 10V; a certain set point is down in-15V arbitrary road output; 1 pin of the first comparator U5A uprises; photoelectrical coupler U1 closes; this is just so that accessory power supply C94 charging; the second comparator U6 is so that the Q12 cut-off; then Q11 also ends; close VCC; power-off can't be worked; protection calculation machine system is closed in power supply output.When four road output voltages+15V ,+5V, 10V and-15V recovers normal range (NR), C94 discharge during beginning, the second comparator U6 is so that the second triode Q12 conducting, then the first also conducting of triode Q11, produce like this VCC, power module is started working, output+15V ,+5V, 10V and-each road voltage of 15V, computer system normal operation.
Claims (5)
1. power voltage monitoring circuit, it is characterized in that: the first resistance R 127 is connected with the negative pole of the first diode D35 in the described circuit, the second resistance R 58 is connected with the negative pole of the second diode D36, the positive pole of described the first diode D35 is connected with the positive pole of the second diode D36, the 3rd resistance R 69 is connected with the negative pole of the 3rd diode D37, the positive pole of described the 3rd diode D37 is connected with the positive pole of the first diode D35, and the first resistance R 127, the second resistance R 58, the 3rd resistance R 69 access respectively 2 pin of the first comparator U5.
2. power voltage monitoring circuit according to claim 1, it is characterized in that: described circuit also comprises the 4th resistance R 70 and the 4th diode D38, the negative pole of the 4th diode D38 is connected with the positive pole of the first diode D35,3 pin of described the 4th resistance R 70 accesses the first comparator U5.
3. power voltage monitoring circuit according to claim 2, it is characterized in that: described circuit also comprises photoelectrical coupler U1, described photoelectrical coupler U1 is connected with the first comparator U5.
4. power voltage monitoring circuit according to claim 3 is characterized in that: the end of described photoelectrical coupler U1 connects accessory power supply C94, and described accessory power supply C94 connects the second comparator U6.
5. power voltage monitoring circuit according to claim 4, it is characterized in that: described the second comparator U6 connects respectively the first triode Q11 and the second triode Q12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521552 CN202856309U (en) | 2012-10-11 | 2012-10-11 | Power supply voltage monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521552 CN202856309U (en) | 2012-10-11 | 2012-10-11 | Power supply voltage monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856309U true CN202856309U (en) | 2013-04-03 |
Family
ID=47987467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220521552 Expired - Lifetime CN202856309U (en) | 2012-10-11 | 2012-10-11 | Power supply voltage monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856309U (en) |
-
2012
- 2012-10-11 CN CN 201220521552 patent/CN202856309U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
|
| CX01 | Expiry of patent term |