CN201524868U - Multiple analog quantity input isolating circuit used for welding machine - Google Patents
Multiple analog quantity input isolating circuit used for welding machine Download PDFInfo
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- CN201524868U CN201524868U CN2009202786795U CN200920278679U CN201524868U CN 201524868 U CN201524868 U CN 201524868U CN 2009202786795 U CN2009202786795 U CN 2009202786795U CN 200920278679 U CN200920278679 U CN 200920278679U CN 201524868 U CN201524868 U CN 201524868U
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Abstract
The utility model provides a multiple analog quantity input isolating circuit used for a welding machine, which comprises an analog signal input switching circuit, a linear isolating circuit, a signal processing circuit and an MCU, and is characterized in that the linear isolating circuit has only one. The multiple analog quantity input isolating circuit simplifies the quantity of the linear isolating circuits, reduces cost and ensures the reality of analog quantity signals and the working reliability of the MCU.
Description
Technical field
The utility model relates to a kind of welding machine with many analog quantitys input isolation circuit.
Background technology
In present electric welding machine product, adopt MCU control more and more, and the working environment of electric welding machine is more abominable, if being used to regulate the analog signals of various welding parameters directly is connected with MCU, then various interfering signals just might cause interference to MCU, and then influence the operate as normal of MCU, especially for the electric welding machine product that adopts inversion transformation technique, itself welding machine inside just exists various high frequencies and other interfering signal, easier interference simulation amount signal, occur when causing MCU treatment of simulated amount signal influencing the operate as normal of welding machine unusually.In order to improve the quality of product, the input of analog signals directly is not connected with MCU usually, but by being connected with MCU again after linear the isolation, with the authenticity of assurance analog signals and the reliability of MCU work.
In the electric welding machine product, often there is multiple analog signals, now usually the mode that adopts is with one the road or the two-way analog signals is linear delivers to MCU respectively after isolating, and as shown in Figure 1, this kind mode needs the multi-channel linear buffer circuit, and cost is than higher.Even the shared route sexual isolation circuit of two-way analog signals, its control signal is switched once in a welding process at the most, so just the two-way analog signals is had certain requirement, and can not make the shared route sexual isolation circuit of any two-way analog quantity.The work schedule of the analog signals that MCU receives as shown in Figure 2.
The utility model content
The utility model proposes a kind of welding machine with many analog quantitys input isolation circuit.Guaranteed the reliability of the authenticity of analog signals and MCU work, and simplified circuit linearity insulating circuit quantity, reduced cost.
A kind of welding machine that the utility model proposes comprises analog signal input-switching circuit, circuit linearity insulating circuit, signal processing circuit and MCU with many analog quantitys input isolation circuit, it is characterized in that: circuit linearity insulating circuit only is one the tunnel.
Further, the analog signal input-switching circuit is under the control of control signal, and by certain each road analog signals of cycle gating, and timesharing ground switches to circuit linearity insulating circuit with the analog signals of gating.
Compared with prior art, the utlity model has one of following at least advantage:
Guaranteed the reliability of the authenticity of analog signals and MCU work, and simplified circuit linearity insulating circuit quantity, reduced cost.
The multi-analog signal according to certain cycle timesharing deliver to circuit linearity insulating circuit, can reach the effect of a plurality of circuit linearity insulating circuits in the prior art by a route sexual isolation circuit.
Description of drawings
Fig. 1 is a prior art neutral line buffer circuit structure chart.
Fig. 2 is an analog signals working timing figure in the prior art.
Fig. 3 be in the utility model welding machine with many analog quantitys input isolation circuit.
Fig. 4 is an analog signals working timing figure in the utility model.
Fig. 5 is the structure chart of embodiment of the present utility model.
The specific embodiment
Fig. 3 be a kind of welding machine that the utility model proposes with many analog quantitys input isolation circuit, comprise analog signal input-switching circuit, circuit linearity insulating circuit, signal processing circuit and MCU, it is characterized in that: circuit linearity insulating circuit only is one the tunnel.
Particularly, the analog signal input-switching circuit is under the control of control signal, timesharing analog signals is delivered to circuit linearity insulating circuit, after signal processing circuit, be input to MCU, MCU discerns and handles corresponding analog signals according to the state of control signal, and all analog signalses all are input to MCU again and again, incessantly.The work schedule of the analog signals that MCU receives as shown in Figure 4.
In the utility model, the annexation between each circuit is same as the prior art, has just omitted the quantity of circuit linearity insulating circuit, and promptly the utility model neutral line buffer circuit has only one the tunnel.The benefit of doing like this is the reliability that has guaranteed the authenticity of analog signals and MCU work, and has simplified circuit quantity, reduced cost.
To specify the utility model below and realize the process that signal is isolated by a route sexual isolation circuit.
Be example with five road analog signalses in the prior art, welding current signal with receive arc current signal gating one tunnel under the effect of control signal, and the analog signals of gating is switched to circuit linearity insulating circuit.Equally, the weldingvoltage signal with receive the arc voltage signal also need be under the effect of control signal gating one tunnel, and the analog signals of gating switched to circuit linearity insulating circuit.For the electric arc control signal, then directly link to each other with circuit linearity insulating circuit.Since at the most can only be in two-way gating one road analog signals, like this, when having only five road analog signalses, just need three-route sexual isolation circuit, thereby increased cost; And its control signal switches once in a welding process at the most, and so just the two-way analog signals to a shared route sexual isolation circuit has certain requirement, and can not make the shared route sexual isolation circuit of any two-way analog quantity.
The utility model can be in the multi-analog signal each road of timesharing gating, and the analog signals of gating switched to circuit linearity insulating circuit, to reduce the quantity of circuit linearity insulating circuit.On the specific implementation, the analog signal input-switching circuit is under the control of control signal, and according to each road analog signals of certain cycle gating, and timesharing ground switches to circuit linearity insulating circuit with the analog signals of gating.
In the utility model, still be example with five road analog signalses, control signal can be for a plurality of, such as control signal A, control signal B and control signal C, each control signal can be controlled the gating of each analog signals, when needs output welding current signal, this analog signals of control signal control gating has only welding current signal effectively and switch to circuit linearity insulating circuit this moment.In like manner, when other analog signalses of needs gating, as long as control gating by control signal.Then, the timesharing of analog signal input-switching circuit each analog signals is switched to circuit linearity insulating circuit.The purpose of doing like this is to have only one road analog signals to deliver to circuit linearity insulating circuit at synchronization.So the utility model can be reached the effect of a plurality of circuit linearity insulating circuits in the prior art by a route sexual isolation circuit.
Below in conjunction with Fig. 5, the specific embodiment of the present utility model is described, 5 road analog signalses are arranged in the present embodiment, but analog signals of the present utility model can be multichannel, is not limited to embodiment.
Welding current signal inputs to 1 pin of electronic switch IC3A behind resistance R 92, follower IC1C; The weldingvoltage signal inputs to 2 pin of electronic switch IC3A behind resistance R 93, follower IC1B; Receive the arc current signal behind resistance R 82, follower IC2C, input to 3 pin of electronic switch IC3B; Receive the arc voltage signal behind resistance R 83, follower IC2B, input to 5 pin of electronic switch IC3B; The electric arc control signal inputs to 5 pin of electronic switch IC4B behind resistance R 73, follower IC2A; 15 pin of electronic switch IC3A are connected with 13 pin of electronic switch IC3C, and 4 pin of electronic switch IC3B are connected with 12 pin of electronic switch IC3C, and 14 pin of electronic switch IC3C are connected with 3 pin of electronic switch IC4B.
As transistor QR21_B, QR22_B, when QR23_B is high level signal, transistor QR21, QR22, the QR23 conducting, optocoupler PC9, PC8, the PC7 conducting, electronic switch IC3A, IC3B, IC3C, the control end of IC4B becomes high level signal, 1 pin of electronic switch IC3A and 15 pin are connected, 13 pin of IC3C and 14 pin are connected, 3 pin of IC4B and 4 pin are connected, welding current signal is 1 pin and 15 pin of process electronic switch IC3A just, 13 pin of IC3C and 14 pin, 3 pin of IC4B and 4 pin, be input to circuit linearity insulating circuit, through being input to MCU after buffer circuit and the signal processing circuit, the analog signals that this moment, MCU received is welding current signal.
The working method that weldingvoltage signal, receipts arc current signal, receipts arc voltage signal, electric arc control signal are input to MCU is identical with the working method that welding current signal is input to MCU, does not repeat them here.
Above-mentioned analog signals, by control signal control, timesharing is input to MCU, according to certain time interval, successively, goes round and begins again.The utility model had both been realized the linearity isolation input of many analog signalses, had simplified circuit again, had reduced cost.
As conclusion, should notice that those skilled in the art will be apparent to make many variations and modification to preferred embodiment, and not break away from principle of the present utility model in fact describing in detail.This variation and modification are included within the described protection domain of appended claims.
Claims (2)
1. a welding machine comprises analog signal input-switching circuit, circuit linearity insulating circuit, signal processing circuit and MCU with many analog quantitys input isolation circuit, it is characterized in that: circuit linearity insulating circuit only is one the tunnel.
According to the described welding machine of claim 1 with many analog quantitys input isolation circuit, it is characterized in that: the analog signal input-switching circuit is under the control of control signal, periodically each road analog signals of gating, and timesharing ground switches to circuit linearity insulating circuit with the analog signals of gating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202786795U CN201524868U (en) | 2009-11-05 | 2009-11-05 | Multiple analog quantity input isolating circuit used for welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202786795U CN201524868U (en) | 2009-11-05 | 2009-11-05 | Multiple analog quantity input isolating circuit used for welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201524868U true CN201524868U (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202786795U Expired - Lifetime CN201524868U (en) | 2009-11-05 | 2009-11-05 | Multiple analog quantity input isolating circuit used for welding machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201524868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338327A (en) * | 2020-10-27 | 2021-02-09 | 唐山松下产业机器有限公司 | Single-power-supply multi-station welding system and welding control method |
-
2009
- 2009-11-05 CN CN2009202786795U patent/CN201524868U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338327A (en) * | 2020-10-27 | 2021-02-09 | 唐山松下产业机器有限公司 | Single-power-supply multi-station welding system and welding control method |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100714 |