CN213023378U - Power failure detection circuit of data acquisition unit - Google Patents
Power failure detection circuit of data acquisition unit Download PDFInfo
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- CN213023378U CN213023378U CN202021547255.7U CN202021547255U CN213023378U CN 213023378 U CN213023378 U CN 213023378U CN 202021547255 U CN202021547255 U CN 202021547255U CN 213023378 U CN213023378 U CN 213023378U
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- resistor
- charger
- detection circuit
- diode
- lithium battery
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Abstract
The utility model discloses a data collection station's power down detection circuitry. The utility model relates to a data collection station's power down detection circuitry, include: the device comprises a charger, a lithium battery, a singlechip, a converter, a diode, a first resistor, a second resistor, a third resistor, a filter capacitor and an NPN triode; the input end of the charger is connected with alternating current, the first output end of the charger is connected with the anode of the diode, the second output end of the charger is connected with the second input end of the lithium battery, the cathode of the diode is connected with the first input end of the lithium battery, and the charger converts the alternating current into direct current. The utility model has the advantages that: whether the data collector is powered down or not can be detected.
Description
Technical Field
The utility model relates to a data collection station field, concretely relates to data collection station's power down detection circuit.
Background
The data acquisition unit is a data terminal for realizing data acquisition and storage of a plurality of monitoring instruments and completing communication with an upper computer, and has an independent data processing function, signals which can be acquired comprise analog quantity input signals and digital quantity input signals, signals which can be controlled to be output comprise relay output signals, interfaces which can be configured comprise a serial interface, an Ethernet interface, a USB interface, a camera interface and the like, and all data information can be displayed through a liquid crystal display. The traditional data collector directly uses 220V mains supply for power supply, and when an enterprise is powered off, the data collector can lose data during the power off, and the data loss cannot be remedied.
Therefore, the data acquisition unit needs to be provided with a lithium battery for power supply, but the existing data acquisition unit does not have a power failure detection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a data collection station's power failure detection circuit, can detect out data collection station and whether fall the power.
In order to solve the technical problem, the utility model provides a data collection station's power down detection circuit, include: the device comprises a charger, a lithium battery, a singlechip, a converter, a diode, a first resistor, a second resistor, a third resistor, a filter capacitor and an NPN triode;
the input end of the charger is connected with alternating current, the first output end of the charger is connected with the anode of the diode, the second output end of the charger is connected with the second input end of the lithium battery, the cathode of the diode is connected with the first input end of the lithium battery, and the charger converts the alternating current into direct current;
one end of the first resistor is connected with the anode of the diode, and the other end of the first resistor is grounded;
one end of the second resistor is connected with the anode of the diode, and the other end of the second resistor is connected with the base electrode of the NPN triode;
the emitting electrode of the NPN triode is grounded, and the collecting electrode of the NPN triode is connected with the detection pin of the single chip microcomputer;
one end of the converter is connected with the lithium battery, the other end of the converter is connected with a power supply end of the single chip microcomputer, and the converter converts the output voltage of the lithium battery into the working voltage required by the single chip microcomputer;
one end of the third resistor is connected with a power supply end of the singlechip, and the other end of the third resistor is connected with a collector electrode of the NPN triode;
one end of the filter capacitor is connected with the collector of the NPN triode, and the other end of the filter capacitor is grounded.
The utility model has the advantages that:
whether the data collector is powered down or not can be detected.
In one embodiment, the resistance value of the first resistor is 10K.
In one embodiment, the resistance of the second resistor is 100K.
In one embodiment, the resistance of the third resistor is 2.2K.
In one embodiment, the diode is of the type MBRS540T 3.
In one embodiment, the charger converts the alternating current to 8.4v direct current.
In one embodiment, the single chip microcomputer is of the type STM32F 429.
In one embodiment, the required working voltage of the single chip microcomputer is 3.3V.
In one embodiment, the size of the filter capacitor is 0.1 uF.
Drawings
Fig. 1 is the utility model discloses data collection station's power down detection circuit's schematic structure.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, a power down detection circuit of a data collector includes: the device comprises a charger, a lithium battery, a single chip microcomputer, a converter, a diode D1, a first resistor R24, a second resistor R91, a third resistor R97, a filter capacitor C88 and an NPN triode Q3;
the input end of the charger is connected with alternating current, the first output end of the charger is connected with the anode of the diode, the second output end of the charger is connected with the second input end of the lithium battery, the cathode of the diode is connected with the first input end of the lithium battery, and the charger converts the alternating current into direct current;
one end of the first resistor is connected with the anode of the diode, and the other end of the first resistor is grounded;
one end of the second resistor is connected with the anode of the diode, and the other end of the second resistor is connected with the base electrode of the NPN triode;
the emitting electrode of the NPN triode is grounded, and the collecting electrode of the NPN triode is connected with the detection pin of the single chip microcomputer;
one end of the converter is connected with the lithium battery, the other end of the converter is connected with a power supply end of the single chip microcomputer, and the converter converts the output voltage of the lithium battery into the working voltage required by the single chip microcomputer;
one end of the third resistor is connected with a power supply end of the singlechip, and the other end of the third resistor is connected with a collector electrode of the NPN triode;
one end of the filter capacitor is connected with the collector of the NPN triode, and the other end of the filter capacitor is grounded.
The utility model has the advantages that:
whether the data collector is powered down or not can be detected. Specifically, alternating current is converted into direct current voltage through the charger, and at the moment, the diode is conducted to output a stable voltage value to charge the lithium battery. When no alternating current exists, the diode is cut off, and the lithium battery cannot be charged. When alternating current exists, the NPN triode is conducted, the detection pin of the single chip microcomputer has no potential, and the single chip microcomputer detects that the voltage value is 0. When no alternating current exists, the NPN triode is cut off at the moment, the voltages at the two ends of the second resistor are consistent, the detection pin of the single chip microcomputer has a potential of 3.3V, and the single chip microcomputer detects that the voltage value changes, namely, the power failure occurs.
When the utility model is implemented, some more specific parameters of the circuit are as follows: the resistance value of the first resistor is 10K. The resistance value of the second resistor is 100K. The resistance of the third resistor is 2.2K. The diode is of the type MBRS540T 3. The charger converts the alternating current to 8.4v direct current. The model of the single chip microcomputer is STM32F 429. The working voltage required by the single chip microcomputer is 3.3V. The size of the filter capacitor is 0.1 uF.
The filter capacitor is used for preventing interference during filtering. The first resistor is used for absorbing redundant current and preventing the diode from reversely leaking electricity.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (9)
1. A power failure detection circuit of a data collector is characterized by comprising: the device comprises a charger, a lithium battery, a singlechip, a converter, a diode, a first resistor, a second resistor, a third resistor, a filter capacitor and an NPN triode;
the input end of the charger is connected with alternating current, the first output end of the charger is connected with the anode of the diode, the second output end of the charger is connected with the second input end of the lithium battery, the cathode of the diode is connected with the first input end of the lithium battery, and the charger converts the alternating current into direct current;
one end of the first resistor is connected with the anode of the diode, and the other end of the first resistor is grounded;
one end of the second resistor is connected with the anode of the diode, and the other end of the second resistor is connected with the base electrode of the NPN triode;
the emitting electrode of the NPN triode is grounded, and the collecting electrode of the NPN triode is connected with the detection pin of the single chip microcomputer;
one end of the converter is connected with the lithium battery, the other end of the converter is connected with a power supply end of the single chip microcomputer, and the converter converts the output voltage of the lithium battery into the working voltage required by the single chip microcomputer;
one end of the third resistor is connected with a power supply end of the singlechip, and the other end of the third resistor is connected with a collector electrode of the NPN triode;
one end of the filter capacitor is connected with the collector of the NPN triode, and the other end of the filter capacitor is grounded.
2. The power down detection circuit of a data collector of claim 1, wherein the resistance of the first resistor is 10K.
3. The power down detection circuit of a data collector of claim 1, wherein the resistance of the second resistor is 100K.
4. The power-down detection circuit of a data collector according to claim 1, wherein the third resistor has a resistance of 2.2K.
5. The power down detection circuit of a data collector of claim 1, wherein the type of the diode is MBRS540T 3.
6. The power down detection circuit of a data collector of claim 1, wherein the charger converts the alternating current to 8.4v direct current.
7. The power failure detection circuit of the data collector as claimed in claim 1, wherein the type of the single chip microcomputer is STM32F 429.
8. The power failure detection circuit of the data collector as claimed in claim 1, wherein the working voltage required by the single chip microcomputer is 3.3V.
9. The power down detection circuit of a data collector of claim 1, wherein the size of the filter capacitor is 0.1 uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021547255.7U CN213023378U (en) | 2020-07-30 | 2020-07-30 | Power failure detection circuit of data acquisition unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021547255.7U CN213023378U (en) | 2020-07-30 | 2020-07-30 | Power failure detection circuit of data acquisition unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213023378U true CN213023378U (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021547255.7U Active CN213023378U (en) | 2020-07-30 | 2020-07-30 | Power failure detection circuit of data acquisition unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213023378U (en) |
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2020
- 2020-07-30 CN CN202021547255.7U patent/CN213023378U/en active Active
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