CN202330541U

CN202330541U - Alternating-current 220V digital input signal acquisition circuit

Info

Publication number: CN202330541U
Application number: CN2011204117872U
Authority: CN
Inventors: 王晓辉; 戴顺辉; 施红雷
Original assignee: SHANGHAI HUAJIAN ELECTRICAL EQUIPMENT CO Ltd
Current assignee: Shanghai Kelin Environmental Protection Engineering Co., Ltd.
Priority date: 2011-10-25
Filing date: 2011-10-25
Publication date: 2012-07-11
Anticipated expiration: 2021-10-25

Abstract

The utility model discloses an alternating-current 220V digital input signal acquisition circuit. One end of an alternating-current 220V digital input signal is connected with a half-wave rectification module, the half-wave rectification module is connected with a voltage-dividing filter module, the voltage-dividing filter module is connected with one end of the input of a photoelectric isolation module, the other end of the input of the photoelectric isolation module is connected with a protection module, the protection module is connected with the other end of the alternating-current 220V digital input signal, one output end of the photoelectric isolation module is grounded, the other output end of the photoelectric isolation module is connected with a pull-up resistor and then the I/O (input/output) pin of an acquisition MCU (microprogrammed control unit), and thereby the circuit which can directly isolate and acquire alternating-current 220V digital input signals is formed. Compared with the prior art, any MCUs can safely and reliably acquire alternating-current 220V digital input by means of the circuit. An intermediate state converter is dispensed with, the system is optimized, the system safety is enhanced, the cost is saved, and safe operation is effectively guaranteed.

Description

A kind of alternating current 220V is opened into the amount signal acquisition circuit

Technical field

A kind of alternating current 220V of the utility model is opened into the amount signal acquisition circuit, relates to a kind of opening into amount acquisition technique field, and particularly alternating current 220V is opened the technical field of gathering into amount.

Background technology

There is opening into amount of alternating current 220V in industry spot, and harvester is generally direct current 24V, and this just needs to increase the device of isolated variable, has increased the complexity of system, has also brought labile factor.

Summary of the invention

The purpose of the utility model is to open into the amount model and need increase the deficiency that isolated variable could be gathered in order to overcome alternating current 220V, designs a kind of alternating current 220V and opens the circuit of directly isolating collection into the amount signal.Its technical scheme that adopts is: comprise that active alternating current 220V opens the structure into amount signal, half-wave rectification block, dividing potential drop filtration module, photoelectric isolation module, protection module; It is characterized in that: alternating current 220V is opened into amount signal one end and is linked to each other with half-wave rectification block; Half-wave rectification block links to each other with the dividing potential drop filtration module; The dividing potential drop filtration module links to each other with an end of photoelectric isolation module input, and the other end of photoelectric isolation module input links to each other with protection module, and protection module is opened into the amount signal other end with alternating current 220V and linked to each other; Photoelectric isolation module output terminal one end ground connection, the other end link to each other with the IO pin of the MCU that gathers after connecting and drawing resistance.

Its circuit is that alternating current 220V is opened the A end that connects D1 into amount signal L end, the K end connection R1 of D1; The other end of R1 is connected with C1 with R2, and the other end of R2 is connected with the A end of the light emitting diode of O1, and the K end of the light emitting diode of O1 is connected with the A end of the other end of C1 and D2; The N end that K end and the alternating current 220V of D2 opened into the amount signal links to each other; The current collection of the triode of O1 is very exported S and is linked to each other with the IO mouth of R3 and MCU, and the other end of R3 links to each other with power supply, and the transistor emitter of O1 links to each other with signal ground.

It is the opening into the amount signal of needs collection of industry spot that described alternating current 220V is opened into the amount signal, and voltage can change within the specific limits; Described half-wave rectification block is made up of D1, and described dividing potential drop filtration module is made up of R1, C1, R2, and described photoelectric isolation module is made up of O1, and described protection module is made up of diode D2.

Described each device model is shown on the figure.

The positive effect of implementing after this technology is: any MCU can realize opening the safe and reliable collection into amount to alternating current 220V through this circuit.Quantity of state conversion equipment in the middle of reducing has been optimized system, has improved security of system, practices thrift cost, and operation effectively ensures safety.

Description of drawings

Fig. 1 is the circuit theory diagrams of the utility model;

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

See accompanying drawing 1; Indicated the model of each components and parts in the schematic diagram of the alternating current 220V amount of opening Acquisition Circuit, the market purchasing components and parts connect by schematic diagram just can realize that alternating current 220V opens the function into the amount collection, and alternating current 220V is opened into amount signal one end and linked to each other with half-wave rectification block; Half-wave rectification block links to each other with the dividing potential drop filtration module; The dividing potential drop filtration module links to each other with an end of photoelectric isolation module input, and the other end of photoelectric isolation module input links to each other with protection module, and protection module is opened into the amount signal other end with alternating current 220V and linked to each other; Photoelectric isolation module output terminal one end ground connection; The other end connects to draw behind the resistance and links to each other with the IO pin of the MCU that gathers, and it is the opening into the amount signal of needs collection of industry spot that described alternating current 220V is opened into the amount signal, and voltage can change within the specific limits; Described half-wave rectification block is made up of D1, and described dividing potential drop filtration module is made up of R1, C1, R2, and described photoelectric isolation module is made up of O1, and described protection module is made up of diode D2;

See accompanying drawing 1; According to principle of work; The alternating current 220V of the needs collection in the circuit is opened into the amount signal and is become d. c. voltage signal through half-wave rectification, the filtering of dividing potential drop filtration module, and d. c. voltage signal is opened into the amount signal what photoelectric isolation module output terminal generation MCU can gather through photoelectric isolation module; The negative half-cycle that protection module is opened into the amount signal at alternating current 220V turn-offs isolation, and protection capacitor C 1 is not damaged by high voltage with photoelectric isolation module O1.

Multichannel is opened into the amount collection as long as circuit done simply duplicate if desired, and circuit is not made any change and can be gathered opening into the amount signal of direct current 220V yet in addition, the L end of positive power source terminal place in circuit, and the N of negative power end place in circuit holds and gets final product.

The above only is the embodiment of the utility model, is not to be that the utility model is done other forms of restriction, is familiar with the professional and technical personnel any, and the utility model can have different changes.Every any modification of within the technical scheme of the utility model, being done, equivalents etc. all should be included within the claim scope of the utility model.

Claims

1. an alternating current 220V is opened into the amount signal acquisition circuit; Comprise that active alternating current 220V opens the structure into amount signal, half-wave rectification block, dividing potential drop filtration module, photoelectric isolation module, protection module; It is characterized in that: alternating current 220V is opened into amount signal one end and is linked to each other with half-wave rectification block; Half-wave rectification block links to each other with the dividing potential drop filtration module, and the dividing potential drop filtration module links to each other with an end of photoelectric isolation module input, and the other end of photoelectric isolation module input links to each other with protection module; Protection module is opened into the amount signal other end with alternating current 220V and is linked to each other; Photoelectric isolation module output terminal one end ground connection, the other end connect to draw behind the resistance and link to each other with the IO pin of the MCU that gathers, realize that a kind of alternating current 220V opens the circuit of directly isolating collection into the amount signal.

2. a kind of alternating current 220V according to claim 1 is opened into the amount signal acquisition circuit, it is characterized in that: its circuit, alternating current 220V are opened the A end that connects D1 into amount signal L end; The K end of D1 connects R1; The other end of R1 is connected with C1 with R2, and the other end of R2 is connected with the A end of the light emitting diode of O1, and the K end of the light emitting diode of O1 is connected with the A end of the other end of C1 and D2; The N end that K end and the alternating current 220V of D2 opened into the amount signal links to each other; The current collection of the triode of O1 is very exported S and is linked to each other with the IO mouth of R3 and MCU, and the other end of R3 links to each other with power supply, and the transistor emitter of O1 links to each other with signal ground.

3. a kind of alternating current 220V according to claim 1 is opened into the amount signal acquisition circuit, it is characterized in that: the input switch amount is an alternating current 220V voltage.