CN204679892U - A kind of constant current electronic load control system - Google Patents
A kind of constant current electronic load control system Download PDFInfo
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- CN204679892U CN204679892U CN201520252450.XU CN201520252450U CN204679892U CN 204679892 U CN204679892 U CN 204679892U CN 201520252450 U CN201520252450 U CN 201520252450U CN 204679892 U CN204679892 U CN 204679892U
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Abstract
The utility model relates to load control technique field, especially a kind of constant current electronic load control system.It comprises control module, A/D change-over circuit, voltage detecting circuit, current detection circuit and load; Load one end is connected with tested power positive end, the other end is connected with tested power supply negative terminal, voltage detecting circuit detects the voltage signal between tested power positive end and load in real time and voltage signal is inputed to A/D change-over circuit, current detection circuit detects the current signal between tested power supply negative terminal and load in real time and signal is inputed to A/D change-over circuit, A/D change-over circuit is connected with control module, and control module is connected with in turn D/A change-over circuit with constant-current control circuit and is connected with load by constant-current control circuit.The present embodiment structure is simple, easy to operate, has very strong practicality.
Description
Technical field
The utility model relates to load control technique field, especially a kind of constant current electronic load control system.
Background technology
As everyone knows, along with the development of modern electronic technology.Constant current electronic load has a wide range of applications, as applied steady current device in industrial automation, robot, intelligent instrument and numerous digital control circuit.Therefore research and develop constant current electronic load to be of great practical significance.But current constant current electronic load is perfect not enough, control operation can not accurately be carried out.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of constant current electronic load control system.
To achieve these goals, the utility model adopts following technical scheme:
A kind of constant current electronic load control system, it comprises control module, display module, A/D change-over circuit, D/A change-over circuit, voltage detecting circuit, current detection circuit, constant-current control circuit and load;
Described load one end is connected with tested power positive end, the other end is connected with tested power supply negative terminal, described voltage detecting circuit detects the voltage signal between tested power positive end and load in real time and voltage signal is inputed to A/D change-over circuit, described current detection circuit detects the current signal between tested power supply negative terminal and load in real time and signal is inputed to A/D change-over circuit, signal is carried out A/D conversion and the signal after conversion is inputed to control module by described A/D change-over circuit, described control module signal is carried out arranging and by arrange after signal feedback to display module and D/A change-over circuit, signal is carried out D/A conversion and the signal after conversion is inputed to constant-current control circuit by described D/A change-over circuit, described constant-current control circuit produces constant-current control signal and signal is inputed to load,
Described control module is also electrically connected with Keysheet module.
Preferably, described voltage detecting circuit comprises the first amplifier, the in-phase end of described first amplifier accesses tested voltage respectively by the first resistance and the first electric capacity, the in-phase end of described first amplifier is respectively by the second resistance and the second capacity earth, the end of oppisite phase of described first amplifier is connected with the output terminal of self, and the output terminal of described first amplifier is connected with the input end of A/D change-over circuit.
Preferably, described constant-current control circuit comprises the second amplifier, 3rd amplifier, four high guaily unit and the first metal-oxide-semiconductor, the in-phase end of described second amplifier is connected with the output terminal of D/A change-over circuit by the 3rd resistance, the end of oppisite phase of described second amplifier is connected by the output terminal of the 6th resistance and four high guaily unit and end of oppisite phase, the in-phase end of described four high guaily unit is by the 8th resistance eutral grounding, the output terminal of described 3rd amplifier is connected with the 3rd resistance by the 5th resistance, the in-phase end ground connection of described 3rd amplifier, the output terminal of described second amplifier is connected with the grid of the first metal-oxide-semiconductor by the 7th resistance, drain electrode and the sources connected in parallel of described first metal-oxide-semiconductor have the first diode, the source electrode of described first metal-oxide-semiconductor is by the 8th resistance eutral grounding, the drain electrode of described first metal-oxide-semiconductor is connected with load.
Owing to have employed such scheme, the utility model realizes the detection of voltage and current signal by voltage detecting circuit and current detection circuit; Meanwhile, A/D change-over circuit and D/A change-over circuit is utilized to realize the conversion of signal; Further, utilize constant-current control circuit to carry out the current constant control of load according to the difference of signal, its structure is simple, easy to operate, has very strong practicality.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the utility model embodiment;
Fig. 2 is the electrical block diagram of the voltage detecting circuit of the utility model embodiment;
Fig. 3 is the electrical block diagram of the constant-current control circuit of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As shown in Figure 1, a kind of constant current electronic load control system that the present embodiment provides, it comprises control module 1, display module 2, A/D change-over circuit 3, D/A change-over circuit 4, voltage detecting circuit 6, current detection circuit 8, constant-current control circuit 7 and load 9, load 9 one end is connected with tested power positive end 10, the other end is connected with tested power supply negative terminal 11, voltage detecting circuit 6 detects the voltage signal between tested power positive end 10 and load 9 in real time and voltage signal is inputed to A/D change-over circuit 3, current detection circuit 8 detects the current signal between tested power supply negative terminal 11 and load 9 in real time and signal is inputed to A/D change-over circuit 3, signal is carried out A/D conversion and the signal after conversion is inputed to control module 1 by A/D change-over circuit 3, control module 1 signal is carried out arranging and by arrange after signal feedback to display module 2 and D/A change-over circuit 4, signal is carried out D/A conversion and the signal after conversion is inputed to constant-current control circuit 7 by D/A change-over circuit 4, constant-current control circuit 7 produces constant-current control signal and signal is inputed to load 9,
Further, control module 1 is also electrically connected with Keysheet module 5.
The present embodiment realizes the detection of voltage and current signal by voltage detecting circuit 6 and current detection circuit 8; Meanwhile, A/D change-over circuit 3 and D/A change-over circuit 4 is utilized to realize the conversion of signal; Further, constant-current control circuit 7 is utilized to carry out the current constant control of load 9.
The present embodiment specific works is as follows:
When starting working, detect voltage and current signal in real time by voltage detecting circuit 6 and current detection circuit 8, the signal detected then realizes conversion and the transmission of signal by A/D change-over circuit 3.Then carry out arranging and the signal feedback of arrangement being shown to display module 2 after control module 1 receives these signals, also by D/A change-over circuit 4, signal is inputed to constant-current control circuit 7 simultaneously, the manipulation of control module 1 realizes by Keysheet module 5, and final constant-current control circuit 7 carries out the current constant control of circuit.The present embodiment is by the detection of voltage and current signal thus realize the current constant control of load more accurately.
The voltage detecting circuit 6 of the present embodiment can adopt circuit structure as shown in Figure 2, namely the first amplifier A1 is comprised, the in-phase end of the first amplifier A1 accesses tested voltage respectively by the first resistance R1 and the first electric capacity C1, the in-phase end of the first amplifier A1 is respectively by the second resistance E2 and the second electric capacity C2 ground connection, the end of oppisite phase of the first amplifier A1 is connected with the output terminal of self, and the output terminal of the first amplifier A1 is connected with the input end of A/D change-over circuit 3.This circuit carries out filtering process by the first electric capacity C1 and the second electric capacity C2, is carried out the amplification of signal by the first amplifier A1.
The constant-current control circuit of the present embodiment can adopt circuit structure as shown in Figure 3, namely the second amplifier A2 is comprised, 3rd amplifier A3, four high guaily unit A4 and the first metal-oxide-semiconductor Q1, the in-phase end of the second amplifier A2 is connected with the output terminal of D/A change-over circuit 4 by the 3rd resistance R3, the end of oppisite phase of the second amplifier A2 is connected by the output terminal of the 6th resistance R6 and four high guaily unit A4 and end of oppisite phase, the in-phase end of four high guaily unit A4 is by the 8th resistance R8 ground connection, the output terminal of the 3rd amplifier A3 is connected with the 3rd resistance R3 by the 5th resistance R5, the in-phase end ground connection of the 3rd amplifier A3, the output terminal of the second amplifier A2 is connected with the grid of the first metal-oxide-semiconductor Q1 by the 7th resistance R7, the drain electrode of the first metal-oxide-semiconductor Q1 and sources connected in parallel have the first diode D1, the source electrode of the first metal-oxide-semiconductor Q1 is by the 8th resistance R8 ground connection, the drain electrode of the first metal-oxide-semiconductor Q1 is connected with load 9.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. a constant current electronic load control system, is characterized in that: it comprises control module, display module, A/D change-over circuit, D/A change-over circuit, voltage detecting circuit, current detection circuit, constant-current control circuit and load;
Described load one end is connected with tested power positive end, the other end is connected with tested power supply negative terminal, described voltage detecting circuit detects the voltage signal between tested power positive end and load in real time and voltage signal is inputed to A/D change-over circuit, described current detection circuit detects the current signal between tested power supply negative terminal and load in real time and signal is inputed to A/D change-over circuit, signal is carried out A/D conversion and the signal after conversion is inputed to control module by described A/D change-over circuit, described control module signal is carried out arranging and by arrange after signal feedback to display module and D/A change-over circuit, signal is carried out D/A conversion and the signal after conversion is inputed to constant-current control circuit by described D/A change-over circuit, described constant-current control circuit produces constant-current control signal and signal is inputed to load,
Described control module is also electrically connected with Keysheet module.
2. a kind of constant current electronic load control system as claimed in claim 1, it is characterized in that: described voltage detecting circuit comprises the first amplifier, the in-phase end of described first amplifier accesses tested voltage respectively by the first resistance and the first electric capacity, the in-phase end of described first amplifier is respectively by the second resistance and the second capacity earth, the end of oppisite phase of described first amplifier is connected with the output terminal of self, and the output terminal of described first amplifier is connected with the input end of A/D change-over circuit.
3. a kind of constant current electronic load control system as claimed in claim 2, it is characterized in that: described constant-current control circuit comprises the second amplifier, 3rd amplifier, four high guaily unit and the first metal-oxide-semiconductor, the in-phase end of described second amplifier is connected with the output terminal of D/A change-over circuit by the 3rd resistance, the end of oppisite phase of described second amplifier is connected by the output terminal of the 6th resistance and four high guaily unit and end of oppisite phase, the in-phase end of described four high guaily unit is by the 8th resistance eutral grounding, the output terminal of described 3rd amplifier is connected with the 3rd resistance by the 5th resistance, the in-phase end ground connection of described 3rd amplifier, the output terminal of described second amplifier is connected with the grid of the first metal-oxide-semiconductor by the 7th resistance, drain electrode and the sources connected in parallel of described first metal-oxide-semiconductor have the first diode, the source electrode of described first metal-oxide-semiconductor is by the 8th resistance eutral grounding, the drain electrode of described first metal-oxide-semiconductor is connected with load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520252450.XU CN204679892U (en) | 2015-04-22 | 2015-04-22 | A kind of constant current electronic load control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520252450.XU CN204679892U (en) | 2015-04-22 | 2015-04-22 | A kind of constant current electronic load control system |
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| Publication Number | Publication Date |
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| CN204679892U true CN204679892U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520252450.XU Expired - Fee Related CN204679892U (en) | 2015-04-22 | 2015-04-22 | A kind of constant current electronic load control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693908A (en) * | 2018-07-11 | 2018-10-23 | 广州市谊华电子设备有限公司 | A kind of voltage-stabilizing constant-source |
| CN110007250A (en) * | 2019-04-29 | 2019-07-12 | 常州轻工职业技术学院 | High precision constant current numerical control electronic load and its working method |
| CN112859980A (en) * | 2021-01-12 | 2021-05-28 | 东莞浩立自动化科技有限公司 | Constant current control system for intelligently detecting load and control method thereof |
| CN113687117A (en) * | 2021-08-19 | 2021-11-23 | 上海卫星工程研究所 | Satellite initiating explosive device equivalent circuit, control method and test device |
-
2015
- 2015-04-22 CN CN201520252450.XU patent/CN204679892U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693908A (en) * | 2018-07-11 | 2018-10-23 | 广州市谊华电子设备有限公司 | A kind of voltage-stabilizing constant-source |
| CN110007250A (en) * | 2019-04-29 | 2019-07-12 | 常州轻工职业技术学院 | High precision constant current numerical control electronic load and its working method |
| CN112859980A (en) * | 2021-01-12 | 2021-05-28 | 东莞浩立自动化科技有限公司 | Constant current control system for intelligently detecting load and control method thereof |
| CN113687117A (en) * | 2021-08-19 | 2021-11-23 | 上海卫星工程研究所 | Satellite initiating explosive device equivalent circuit, control method and test device |
| CN113687117B (en) * | 2021-08-19 | 2024-02-09 | 上海卫星工程研究所 | Equivalent circuit, control method and test device for satellite initiating explosive device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20160422 |