CN209821615U

CN209821615U - 110/220V conversion sampling circuit based on single chip microcomputer

Info

Publication number: CN209821615U
Application number: CN201920002415.0U
Authority: CN
Inventors: 吴建中
Original assignee: NANTONG FREE ELECTRO-MECHANICAL Co Ltd
Current assignee: NANTONG FREE ELECTRO-MECHANICAL Co Ltd
Priority date: 2019-01-02
Filing date: 2019-01-02
Publication date: 2019-12-20
Anticipated expiration: 2029-01-02

Abstract

The utility model provides a based on singlechip 110/220V conversion sampling circuit, its characterized in that: the device comprises a voltage sampling circuit, a microcontroller and a relay, wherein the voltage sampling circuit is electrically connected with a power supply input end, the voltage sampling circuit is electrically connected with the microcontroller through an optical coupler, and the relay is electrically connected with a control port of the microcontroller; the voltage sampling circuit transmits a sampling signal to a port of the microcontroller through the optical coupler, the microcontroller obtains a stable signal through time delay and multiple sampling of output of the optical coupler, and the stable signal is subjected to 110/220 conversion through the port control relay; the hardware circuit is simplified, the reliability is improved, and the service life of the machine is prolonged.

Description

110/220V conversion sampling circuit based on single chip microcomputer

Technical Field

The utility model relates to an contravariant welding machine technical field especially relates to a based on 110/220V conversion sampling circuit.

Background

At present, the voltage conversion sampling circuit is realized by an electronic circuit: the voltage-stabilizing circuit consists of a sampling circuit, a holding circuit and an output relay, and 110/220V conversion is realized.

For example, the patent with the prior publication number of CN203304745U discloses an automatic voltage conversion circuit for an inverter welding machine, which comprises an input detection circuit, a high voltage detection circuit, a low voltage detection circuit, and a high voltage conversion driving circuit and a low voltage conversion driving circuit matched with the input detection circuit and the low voltage detection circuit, wherein a change-over switch is arranged on a main power supply line of the welding machine, one end of the low voltage detection circuit is connected to a signal output end of the input detection circuit after being connected in series with the low voltage conversion driving circuit, the other end of the low voltage detection circuit is connected to a driving signal input end of the change-over switch, one end of the high voltage detection circuit is also connected to a signal output end of the input detection circuit after being connected in series with the high voltage conversion driving circuit.

However, the disadvantages of this conversion sampling method are: when the machine uses 220V voltage, the electronic circuit is too sensitive in the power-on process, the circuit can act once when the voltage reaches 110V, and then act once again when the voltage reaches 220V, so that a jump action exists in the period, and the machine can be misoperated or damaged.

SUMMERY OF THE UTILITY MODEL

For overcoming existence among the prior art, go up the too sensitive problem that leads to producing unnecessary beating of electric in-process electronic circuit, the utility model provides a based on singlechip 110/220V conversion sampling circuit.

The utility model adopts the technical proposal that: A110/220V conversion sampling circuit based on a single chip microcomputer comprises a voltage sampling circuit, a microcontroller and a relay, wherein the voltage sampling circuit is electrically connected with a power supply input end, the voltage sampling circuit is electrically connected with the microcontroller through an optical coupler, and the relay is electrically connected with a control port of the microcontroller; the voltage sampling circuit transmits sampling signals to a port of the microcontroller through the optical coupler, the microcontroller obtains stable signals through time delay and multiple sampling optical coupler outputs, and the stable signals are converted through 110/220 by controlling the relay through the port.

In some embodiments, the voltage sampling circuit comprises a relay, a load resistor and a load resistor connected to the input of the circuit, an RC filter circuit, and a voltage comparison module optically coupled to the voltage comparison module.

In some embodiments, the relay comprises a load resistor, a absorption circuit consisting of a capacitor and a resistor, and an input DSP system clamping protection circuit, and one end of the relay is grounded.

The voltage sampling circuit transmits a sampling signal to an I/O port P25 of the microcontroller through the optical coupler, the microcontroller obtains a stable signal through time delay and multiple sampling output of the optical coupler, and then the relay M3 is controlled through the I/O port P03, so that 110/220 conversion is realized.

Compared with the prior art, the beneficial effects of the utility model are that: the voltage conversion and sampling function of 110/220V is realized, the hardware circuit is simplified, the reliability is improved, and the service life of the machine is prolonged.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model discloses a based on singlechip 110/220V conversion sampling circuit, as shown in FIG. 1: the voltage sampling circuit M1 is electrically connected with a power supply input end, the voltage sampling circuit M1 is electrically connected with the microcontroller M2 through an optical coupler N1, and the relay M3 is electrically connected with a control port of the microcontroller M2; the voltage sampling circuit M1 transmits a sampling signal to a port of the microcontroller M2 through the optocoupler N1, the microcontroller M2 obtains a stable signal through delaying and sampling the output of the optocoupler N1 for multiple times, and then the relay M3 is controlled through the port to perform 110/220 conversion.

In some embodiments, the voltage sampling circuit M1 includes a relay E1, a load resistor R1, a load resistor R2 and a load resistor R3 connected at the circuit input, an RC filter circuit, and a voltage comparison module connected with an opto-coupler N1.

In some embodiments, the relay M3 includes a load resistor, a snubber circuit composed of a capacitor and a resistor, and an input DSP system clamping protection circuit, and one end of the relay M3 is grounded.

In some embodiments, the microcontroller (M2) employs an intel's 80C96KB single chip microcomputer.

Through an M1 sampling circuit, a microcontroller M2 delays time, a stable signal is obtained through multiple times of sampling, and then a relay M3 is controlled to realize a 110/220 voltage conversion function; the voltage sampling circuit M1 transmits a sampling signal to an I/O port P25 of a microcontroller M2 through an optical coupler N1, the microcontroller obtains a stable signal through time delay and multiple sampling output of the optical coupler, and then the relay M3 is controlled through the I/O port P03 to realize 110/220 conversion.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a based on singlechip 110/220V conversion sampling circuit which characterized in that: the voltage sampling circuit M1 is electrically connected with a power supply input end, the voltage sampling circuit M1 is electrically connected with the microcontroller M2 through an optical coupler N1, and the relay M3 is electrically connected with a control port of the microcontroller M2; the voltage sampling circuit M1 transmits a sampling signal to a port of the microcontroller M2 through the optocoupler N1, the microcontroller M2 obtains a stable signal through delaying and sampling the output of the optocoupler N1 for multiple times, and then the relay M3 is controlled through the port to perform 110/220 conversion.

2. The 110/220V conversion sampling circuit based on the single chip microcomputer of claim 1, wherein: the voltage sampling circuit M1 comprises a relay E1, a load resistor R1, a load resistor R2, a load resistor R3, an RC filter circuit and a voltage comparison module, wherein the relay E1, the load resistor R1, the load resistor R2 and the load resistor R3 are connected with the circuit input end, and the voltage comparison module is connected with an optical coupler N1.

3. The 110/220V conversion sampling circuit based on the single chip microcomputer of claim 1, wherein: the relay M3 comprises a load resistor, an absorption circuit consisting of a capacitor and a resistor, and an input DSP system clamping protection circuit, and one end of the relay M3 is grounded.