CN210665805U - High-speed interface circuit that opens of distribution automation terminal tester - Google Patents
High-speed interface circuit that opens of distribution automation terminal tester Download PDFInfo
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- CN210665805U CN210665805U CN201920894426.4U CN201920894426U CN210665805U CN 210665805 U CN210665805 U CN 210665805U CN 201920894426 U CN201920894426 U CN 201920894426U CN 210665805 U CN210665805 U CN 210665805U
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Abstract
The utility model discloses a high-speed interface circuit that opens of distribution automation terminal tester relates to distribution automation test technical field, and signal input interface respectively with logical NOT gate U3Input end of, opto-coupler U2Is connected with the cathode of the light emitting diode. Logical NOT gate U3Output end and optical coupler U1Is connected with the cathode of the light emitting diode. Resistance R1And a terminal of (1) and a power supply VDC1Connection, resistance R1And the other end of the optical coupler U1Is connected with the anode of the light emitting diode, and a resistor R2And a terminal of (1) and a power supply VDC1Connected with the other end of the optical coupler U2The anode of the light emitting diode is connected. Optocoupler U1Collector of phototriode and power supply VDC2Connect, optocoupler U1Respectively connected with the signal output interface and the optical coupler U2The collector of the phototriode is connected with an optocoupler U2The emitter of (2) is grounded. The special structure can provide a parasitic capacitor and a filter capacitor energy discharge loop of a remote signaling interface circuit of the distribution automation terminal, accelerate the voltage reduction speed and avoid errors during detection.
Description
Technical Field
The utility model relates to a distribution automation tests technical field, concretely relates to high-speed interface circuit that opens of distribution automation terminal tester.
Background
The anti-shaking function of the distribution automation terminal switch is a key index of the distribution automation terminal, and a remote signaling interface of the distribution automation terminal is generally accessed to a development interface of a distribution automation terminal tester for testing. The remote signaling interface of the distribution automation terminal generally adopts an optical isolation mode, as shown in fig. 2, a filter capacitor is generally designed at the input end of the remote signaling interface, and when the output of an open circuit of the distribution automation terminal tester is disconnected, due to the slow discharge of capacitor charges, the reduction time of a capacitor level is prolonged, so that the test error of the switch anti-shake function is caused. In practice, it is found that if the discharge time of the filter capacitor is longer than 1ms, the test result is affected, and data errors occur.
Disclosure of Invention
In order to improve the test accuracy of distribution automation terminal tester to distribution automation terminal anti-shake function, the utility model aims at providing a high-speed interface circuit that opens of distribution automation terminal tester, this interface circuit can provide distribution automation terminal remote signalling interface circuit filter capacitance's the return circuit that discharges when the disconnection is exported to filter capacitance's discharge speed improves distribution automation terminal tester switching value output time precision with higher speed.
In order to realize the purpose, the utility model discloses a technical scheme be:
a high-speed output circuit of distribution automation terminal tester comprises a signal input interface, a signal output interface, and a resistor R1Resistance R2Optical coupler U1Optical coupler U2Logical NOT gate U3；
The signal input interfaces are respectively connected with a logic NOT gate U3Input end of, opto-coupler U2The cathode of the light emitting diode is connected;
the logic NOT gate U3Output end and optical coupler U1The cathode of the light emitting diode is connected;
the resistor R1And a terminal of (1) and a power supply VDC1Connection, resistance R1And the other end of the optical coupler U1The anode of the light emitting diode is connected;
the resistor R2And a terminal of (1) and a power supply VDC1Connected with the other end of the optical coupler U2The anode of the light emitting diode is connected;
the optical coupler U1Collector of phototriode and power supply VDC2Connect, optocoupler U1Respectively connected with the signal output interface and the optical coupler U2The collector of the phototriode is connected;
optocoupler U2The emitter of (2) is grounded.
Preferably, the power supply VDC1Is a DC5V power supply.
Preferably, the signal input interface and the signal output interface are quick-connection terminals.
Preferably, the optical coupler U1Optocoupler U2A PC817 photoelectric isolator is adopted;
the logic NOT gate U3A CD4069 not gate chip was used.
After the technical scheme is adopted, the utility model discloses there is following beneficial effect: when the distribution automation terminal tester is opened at a high speed to disconnect the output of the interface circuit, the distribution automation terminal tester can provide a parasitic capacitance and filter capacitance energy release loop of a remote signaling interface circuit of the distribution automation terminal, so that the voltage drop speed is accelerated, and errors during detection are avoided.
Drawings
Fig. 1 is a schematic diagram of a circuit structure according to an embodiment of the present invention;
fig. 2 is a distribution automation terminal remote signaling interface circuit.
Detailed Description
In order to improve the test accuracy of distribution automation terminal tester to distribution automation terminal anti-shake function, the utility model aims at providing a distribution automation terminal tester high-speed interface circuit that opens out, this interface circuit can provide the discharge circuit of distribution automation terminal remote signalling interface circuit filter capacitance parasitic capacitance when the disconnection is exported to filter capacitance and parasitic capacitance's discharge velocity improves distribution automation terminal tester switching value output time precision with higher speed.
As shown in FIG. 1, a high-speed output circuit of a distribution automation terminal tester comprises a signal input interface, a signal output interface, and a resistor R1Resistance R2Optical coupler U1Optical coupler U2Logical NOT gate U3。
The signal input interface and the signal output interface can be various connectors or quick connection terminals so as to facilitate quick wiring.
The signal input interfaces are respectively connected with a logic NOT gate U3Input end of, opto-coupler U2Is connected with the cathode of the light emitting diode. Logical NOT gate U3Output end and optical coupler U1Is connected with the cathode of the light emitting diode.
Optocoupler U1Optocoupler U2Adopts a PC817 photoelectric isolator and a logic NOT gate U3A CD4069 not gate chip was used.
Resistance R1And a terminal of (1) and a power supply VDC1Connected with the other end of the optical coupler U1The anode of the light emitting diode is connected;
resistance R2And a terminal of (1) and a power supply VDC1Connection ofAnd the other end is connected with an optical coupler U2The anode of the light emitting diode is connected;
power supply VDC1Is a DC5V power supply.
Optocoupler U1Collector of phototriode and power supply VDC2Connect, optocoupler U1Respectively connected with the signal output interface and the optical coupler U2The collector of the phototriode is connected. Optocoupler U2The emitter of (2) is grounded.
In use, the signal output interface of fig. 1 is connected to point a of fig. 2. When the signal input interface inputs a high level, the optocoupler U1Conducting and optical coupler U2The remote signaling interface circuit of the cut-off and distribution automation terminal passes through the optical coupler U1Quick charging, when the signal input interface inputs low level, the optical coupler U2Conducting and optical coupler U1The remote signaling interface circuit of the cut-off and distribution automation terminal passes through the optical coupler U2And the discharge is fast, so that the purpose of improving the output level of the output circuit of the distribution automation terminal tester to be fast turned over is achieved.
Claims (4)
1. A high-speed interface circuit for a distribution automation terminal tester is characterized by comprising a signal input interface, a signal output interface and a resistor R1Resistance R2Optical coupler U1Optical coupler U2Logical NOT gate U3；
The signal input interfaces are respectively connected with a logic NOT gate U3Input end of, opto-coupler U2The cathode of the light emitting diode is connected;
the logic NOT gate U3Output end and optical coupler U1The cathode of the light emitting diode is connected;
the resistor R1One end of (1) and a power supply VDC1Connection, resistance R1And the other end of the optical coupler U1The anode of the light emitting diode is connected;
the resistor R2One end of (1) and a power supply VDC1Connected with the other end of the optical coupler U2The anode of the light emitting diode is connected;
the optical coupler U1Collector of phototriode and power supply VDC2Connect, optocoupler U1Respectively connected with the signal output interface and the optical coupler U2The collector of the phototriode is connected;
optocoupler U2The emitter of (2) is grounded.
2. The power distribution automation terminal tester high speed interface-out circuit of claim 1, characterized in that:
the power supply VDC1Is a DC5V power supply.
3. The power distribution automation terminal tester high speed interface-out circuit of claim 1, characterized in that:
the signal input interface and the signal output interface are quick-connection terminals.
4. The power distribution automation terminal tester high speed interface-out circuit of claim 1, characterized in that:
the optical coupler U1Optocoupler U2A PC817 photoelectric isolator is adopted;
the logic NOT gate U3A CD4069 not gate chip was used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894426.4U CN210665805U (en) | 2019-06-14 | 2019-06-14 | High-speed interface circuit that opens of distribution automation terminal tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894426.4U CN210665805U (en) | 2019-06-14 | 2019-06-14 | High-speed interface circuit that opens of distribution automation terminal tester |
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| Publication Number | Publication Date |
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| CN210665805U true CN210665805U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920894426.4U Active CN210665805U (en) | 2019-06-14 | 2019-06-14 | High-speed interface circuit that opens of distribution automation terminal tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484799A (en) * | 2020-12-08 | 2021-03-12 | 河北海峰电子科技有限公司 | Ultrasonic open channel flowmeter |
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2019
- 2019-06-14 CN CN201920894426.4U patent/CN210665805U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484799A (en) * | 2020-12-08 | 2021-03-12 | 河北海峰电子科技有限公司 | Ultrasonic open channel flowmeter |
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