CN203261536U - Power supply - Google Patents
Power supply Download PDFInfo
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- CN203261536U CN203261536U CN 201320237701 CN201320237701U CN203261536U CN 203261536 U CN203261536 U CN 203261536U CN 201320237701 CN201320237701 CN 201320237701 CN 201320237701 U CN201320237701 U CN 201320237701U CN 203261536 U CN203261536 U CN 203261536U
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Abstract
The utility model provides a power supply. The power supply comprises a voltage conversion unit, a signal detection unit connected with an output terminal of the voltage conversion unit, and a control unit connected with the voltage conversion unit and the signal detection unit. The control unit is configured to control the voltage conversion unit to provide a constant output according to a signal detected by the signal detection unit. According to the utility model, a signal of the output terminal of the voltage conversion unit is detected by the signal detection unit and calculated and analyzed by the control unit, and the voltage is adjusted by the voltage conversion unit, so that a constant output power is obtained.
Description
Technical field
The utility model relates to circuit engineering, relates in particular to a kind of power supply.
Background technology
Optical detection apparatus and image processing techniques are widely used in the non-contact measurement field, have the advantages such as certainty of measurement height, measuring speed be fast, and do not contact with measured object in measuring process, therefore greatly reduce measure error.Wherein, optical detection apparatus is comparatively strict to the illumination requirement of houselights, only has illumination constant, and optical measuring apparatus just can obtain accurately measurement data.And image processing techniques requirement to lamp illuminance in the link of image capture is also comparatively strict, only have illumination constant, the image volume of guarantee picked-up reveals accurately information of measured object, avoids causing the color value of partial pixel in the image or gray value to produce undesirable variation because uneven illumination is even.Under identical light-receiving area condition, the illumination of houselights mainly is the power decision by houselights, and the power output of power supply is the key factor that affects the power of houselights, therefore, only has power supply just can make illumination keep constant for houselights provides constant electrical power.
At present, power supply product has constant voltage source and constant-current supply, and constant voltage source can provide constant output voltage, but the resistance of houselights filament is along with the increase of conduction time produces heat, and resistance increases, and reduces so that flow through the electric current of filament resistance, power descends, thereby causes illumination to descend.Constant-current supply provides constant output current, and when filament resistance increased, the output voltage of constant-current supply also increased, and guarantees that the electric current flow through filament resistance remains unchanged, but increases the useful life that the voltage at filament resistance two ends has but reduced filament.Therefore be badly in need of a kind of power supply that can export firm power, provide constant electrical power to houselights, so that the power of houselights keeps is constant, and then make illumination keep constant.
The utility model content
The utility model provides a kind of power supply, and constant electromotive power output can be provided.
The utility model provides a kind of power supply, comprising: voltage conversion unit, the detecting signal unit that is connected with described voltage conversion unit output, and the control unit that is connected with detecting signal unit with described voltage conversion unit;
The described voltage conversion unit of signal controlling that described control unit is configured to detect according to described detecting signal unit is exported constant output variable.
Aforesaid power supply, described detecting signal unit comprises the electrical power detection components;
Described voltage conversion unit comprises electromotive power output adjustment assembly.
Aforesaid power supply, described electromotive power output are adjusted assembly and are comprised: the voltage resistance transformation device and the voltage regulation of electric power sources device that is connected with described voltage resistance variation device that are used for the voltage signal of described control unit output is converted to resistance signal;
Described voltage resistance transformation device is connected with described control unit.
Aforesaid power supply, described electrical power detection components comprises the voltage detection device for detection of described voltage conversion unit output end voltage, and for detection of the current detecting device of described voltage conversion unit output end current.
Aforesaid power supply, described voltage detection device adopts first voltage sensor in parallel with described voltage conversion unit output.
Aforesaid power supply, described current detecting device comprises the resistance device that is connected on described voltage conversion unit output, and the second voltage transducer in parallel with described resistance device.
Aforesaid power supply, described resistance device are that resistance varies with temperature rate less than 30/1000000ths resistance.
Aforesaid power supply, described control unit are single-chip microcomputer.
Aforesaid power supply, described control unit comprises single-chip microcomputer and hardware multiplier;
Described hardware multiplier is connected with single-chip microcomputer with described voltage detection device, current detecting device respectively.
The technical scheme that the utility model provides adopts detecting signal unit to detect the signal of voltage conversion unit output, and calculate and analyze by the signal of control unit according to the voltage conversion unit output that detects, by adjusting the voltage of voltage conversion unit output, can provide constant electromotive power output.If the power supply that employing the utility model provides as the power supply of houselights, then can make the power of houselights keep constant, and then makes illumination keep constant, improve accuracy of detection.
Description of drawings
The structural representation of a kind of power supply that Fig. 1 provides for the utility model embodiment;
The structural representation of the another kind of power supply that Fig. 2 provides for the utility model embodiment;
Fig. 3 is the structural representation of voltage resistance transformation device connected mode among Fig. 2;
The structural representation of another power supply that Fig. 4 provides for the utility model embodiment.
Embodiment
The structural representation of the another kind of power supply that the structural representation of a kind of power supply that Fig. 1 provides for the utility model embodiment, Fig. 2 provide for the utility model embodiment, Fig. 3 is the structural representation of voltage resistance transformation device connected mode among Fig. 2.As shown in Figure 1 to Figure 3, this power supply comprises voltage conversion unit 1, the detecting signal unit 2 that is connected with voltage conversion unit 1 output, and are connected the control unit 3 that is connected with detecting signal unit with voltage conversion unit 1.The signal controlling voltage conversion unit 1 that this control unit 3 is configured to detect according to detecting signal unit 2 is exported constant output variable.
Concrete, voltage conversion unit 1 is used for the voltage of outside input is carried out voltage transitions, offers power consumption equipment.Voltage conversion unit 1 can comprise impulse current amplitude limit assembly, input filter assembly, voltage transitions assembly and the output filtering assembly etc. that possess in the power supply commonly used, wherein, the input filter assembly is used for the voltage signal of outside input is carried out filtering, and offer the voltage transitions assembly and carry out voltage transitions, then through the again filtering of output filtering assembly, filtered voltage signal can be used as the output signal of voltage conversion unit 1.
Input end in the detecting signal unit 2 is connected with the output of voltage conversion unit 1, and for detection of the signal of voltage conversion unit 1 output, this signal can be voltage signal, current signal or electrical power signal.And the signal output part of detecting signal unit 2 is connected with the signal input part of control unit 3, sends the signal of voltage conversion unit 1 output that detects to control unit 3.Detecting signal unit 2 can adopt checkout equipment commonly used in the prior art, for example adopt the voltage signal of voltage sensor senses voltage conversion unit 1 output, adopt current sensor to detect the current signal of voltage conversion unit 1 output, and adopt power sensor to detect the electrical power signal of voltage conversion unit 1 output, and voltage, electric current or the electrical power data that detect are offered control unit 3.Certainly, the voltage and current that also voltage sensor and current sensor can be detected respectively multiplies each other, as the electrical power of voltage conversion unit 1 output.
The signal of voltage conversion unit 1 output that control unit 3 reception detecting signal units 2 detect, by analysis and calculate, generate control signal, the signal output part by control unit 3 sends to voltage conversion unit 1, keeps constant with the output variable of adjusting voltage conversion unit 1.For example control unit 3 receives the current signal of voltage conversion unit 1 output that detecting signal units 2 detect, by analysis and calculate, obtain the adjustment direction of current signal and adjust quantity as control signal, send to voltage conversion unit 1, so that voltage conversion unit 1 realizes exporting constant electric current by adjusting output voltage; Perhaps control unit 3 receives the electrical power signal of voltage conversion unit 1 output that detecting signal units 2 detect, by analysis and calculate, obtain the adjustment direction of electrical power signal and adjust quantity as control signal, send to voltage conversion unit 1, so that voltage conversion unit 1 realizes exporting constant electrical power by adjusting output voltage.
Present embodiment is specifically described to adjust the constant electrical power of power supply output as example.That is: detecting signal unit 2 can comprise the electrical power detection components, and the inside of voltage conversion unit 1 can also comprise electromotive power output adjustment assembly.Electromotive power output is adjusted assembly and is connected with control unit 3, and the concrete control signal that is used for sending according to control unit 3 is adjusted the electrical power of voltage conversion unit 1 output and kept constant, can realize by the mode of adjusting output voltage or output current.The circuit connecting relation that electromotive power output is adjusted other assemblies in assembly and the voltage conversion unit 1 can adopt mode commonly used in the prior art, for example the input of electromotive power output adjustment assembly is connected with the output of input filter assembly, and the output that electromotive power output is adjusted assembly is connected with the input of output filtering assembly.
The course of work of the power supply that technique scheme provides is: detecting signal unit 2 detects the electrical power of voltage conversion unit 1 output, sends to control unit 3.Control unit 3 compares the electrical power that detects with corresponding electrical power set point, obtain deviate, then the electromotive power output that this deviate is sent in the voltage conversion unit 1 is adjusted assembly, be used for to adjust the voltage of voltage conversion unit 1 output, with the electrical power of adjusting voltage conversion unit 1 output and keep constant.
Electromotive power output is adjusted assembly preferably can comprise the voltage resistance transformation device 11 and the voltage regulation of electric power sources device 12 that is connected with voltage resistance transformation device 11 that is converted to resistance signal for the voltage signal with control unit 3 outputs.Wherein, voltage regulation of electric power sources device 12 can adopt the circuit structure identical with above-mentioned voltage transitions assembly, offer load after the external input voltage of voltage conversion unit 1 changed, for example: voltage regulation of electric power sources device 12 can comprise transformer and the corresponding voltage regulator circuit in the existing analog power, convert external input voltage to set amplitude voltage and offer load, perhaps, voltage regulation of electric power sources device 12 also can comprise switching device and the corresponding voltage regulator circuit in the existing Switching Power Supply, can be to the amplitude of external input voltage, frequency and phase angle are regulated, and offer load.In existing analog power or Switching Power Supply, all be provided with potentiometer, so that the technical staff regulates the output voltage of analog power or Switching Power Supply by the resistance of adjusting this potentiometer.
The electrical power detection components can comprise the voltage detection device 21 for detection of voltage conversion unit 1 output end voltage, and for detection of the current detecting device 22 of voltage conversion unit 1 output end current.Wherein voltage detection device 21 can adopt voltage detecting transducer commonly used in the prior art, for example voltage sensor of Hall voltage transducer, isolation voltage transducer or other types.Voltage detection device 21 in the power supply that the utility model provides adopts first voltage sensor 211 in parallel with voltage conversion unit 1 output.Current detecting device 22 is for detection of the electric current of voltage conversion unit 1 output, current detecting device 22 is connected on the output of voltage conversion unit 1, can adopt current detection sensor commonly used in the prior art, for example the current sensor of Hall current sensor, optical current transformer and other types also can adopt other can detect the method for voltage conversion unit 1 output end current.Current detecting device 22 in the power supply that the utility model provides preferably can comprise the resistance device 221 that is connected on voltage conversion unit 1 output and the second voltage transducer 222 in parallel with resistance device 221.Second voltage transducer 222 is for detection of the voltage at resistance device 221 two ends, obtains electric current by resistance device 221 according to Ohm's law, is the electric current of voltage conversion unit 1 output.Resistance device 221 can be selected the resistance of high stability, high-power and small resistance, and namely the resistance of resistance device 221 is small, power is larger, and the temperature variant amount of resistance is less.For different power consumption equipments, can according to the electrical power variation characteristic of power consumption equipment, select the resistance of suitable model.The resistance of the resistance device 221 of selecting in the power supply that the utility model provides is 0.001 Ω, and resistance varies with temperature rate less than 30/1000000ths.Select the resistance of this type can greatly reduce the impact that voltage conversion unit 1 electromotive power output is produced because resistance string is associated in voltage conversion unit 1 output.
The signal controlling voltage conversion unit 1 output constant output variable of the function of control unit 3 for detecting according to detecting signal unit 2 can adopt controller commonly used in the prior art, for example microcontroller chip and interlock circuit.Present embodiment adopts single-chip microcomputer as the core controller (hereinafter referred to as single-chip microcomputer 31) of control unit 3.The signal input part of single-chip microcomputer 31 is connected with detecting signal unit 2, the electrical power of voltage conversion unit 1 output that reception detecting signal unit 2 detects, on the basis of technique scheme, specifically can be connected with the current detecting device with voltage detection device 21 and be connected, the voltage and current data of voltage conversion unit 1 output that receiver voltage detection means 21 and current detecting device 22 detect, and the voltage and current data are multiplied each other obtain the electrical power data.Single-chip microcomputer 31 compares these electrical power data and electrical power set point, obtain deviate, this deviate can on the occasion of or negative value, sign represents the direction that voltage conversion unit 1 power output should be adjusted, the size that absolute value representation voltage conversion unit 1 power output of deviate should be adjusted.Single-chip microcomputer 31 sends to voltage conversion unit 1 with this deviate again, so that voltage conversion unit 1 is adjusted output voltage according to this deviate.
Concrete, the input of the voltage resistance transformation device 11 in the voltage conversion unit 1 is connected with control unit 3, the electrical power deviate that reception control unit 3 sends, this deviate is voltage signal, voltage resistance transformation device 11 is converted to resistance signal with this voltage signal, to adjust the electrical power of voltage conversion unit 1 output by the resistance that changes resistance.It can be the device of resistance with voltage transitions that voltage resistance transformation device 11 can adopt in the prior art commonly used, and digital regulation resistance for example replaces this digital regulation resistance in the potentiometer that arranges in existing analog power or the Switching Power Supply.Take analog power as example: the negative pole of the voltage stabilizing didoe in the wherein end of output in the digital regulation resistance and the voltage regulation of electric power sources device 12 is connected, the other end passes through grounding through resistance, the input of digital regulation resistance is connected with the signal output part of control unit 3, the electrical power deviate that reception control unit 3 sends.The electrical power deviate that digital regulation resistance sends according to control unit 3 changes the effective resistance value in the digital regulation resistance, and then adjusts the voltage of voltage conversion unit 1 output.The model of digital regulation resistance can be set according to the scope of voltage transitions in the voltage conversion unit 1.For Switching Power Supply, can adopt similar operation, digital regulation resistance is accessed in the voltage regulation of electric power sources device 12, replace existing potentiometer, to adjust the voltage of voltage conversion unit 1 output by the effective resistance value of adjusting digital regulation resistance.
Optionally, if detecting signal unit 2 is selected the power detection device of analog output, then can between detecting signal unit 2 and control unit 3 analog to digital converter be set, the analog signals that detecting signal unit 2 is exported is converted to digital quantity, sends control unit 3 to again.
In the power supply that the utility model provides, the voltage signal and the current signal that detect are processed, can adopt following method with the method that obtains the electrical power deviate: single-chip microcomputer 31 is concrete is connected with the second voltage transducer with the first voltage sensor 211 and is connected, receive the voltage of voltage conversion unit 1 output that the first voltage sensor 211 detects, the voltage at resistance device 221 two ends that detect with second voltage transducer 222, single-chip microcomputer 31 directly multiplies each other the magnitude of voltage that the first voltage sensor 211 and second voltage transducer 222 detect, and no longer divided by the resistance of resistance device 221, avoid occurring because of the problem that causes precise decreasing as division.Accordingly, the electrical power set point is also done suitable adjustment, no longer divided by the resistance of resistance device 221.Result and this electrical power set point after single-chip microcomputer 31 multiplies each other two magnitudes of voltage compare, and obtain deviate.
Certainly, those skilled in the art also can adopt voltage by resistance device 221 two ends divided by the resistance of resistance device 221, come the electrical power of calculating voltage converting unit 1 output with the electric current that obtains by resistance device 221, or adopt the electric current of direct measuring voltage converting unit 1 output of current sensor to send to single-chip microcomputer 31.The processing procedure that 31 pairs of above-mentioned single-chip microcomputers detect voltage or current data specifically can realize by technical staff's coding, can realize that the utility model is not construed as limiting this according to programming language and the programming custom that single-chip microcomputer 31 types of selecting adopt those skilled in the art to habitually practise.
The course of work of the power supply that technique scheme provides is: the first voltage sensor 211 and second voltage transducer 222 detect respectively the voltage of voltage conversion unit 1 output and the voltage at resistance device 221 two ends, and send to single-chip microcomputer 31.Single-chip microcomputer 31 compares with the electrical power set point after the voltage data at the voltage of voltage conversion unit 1 output and resistance device 221 two ends is multiplied each other, and obtains deviate, and this deviate is sent to voltage resistance transformation device 11 in the voltage conversion unit 1.Voltage resistance transformation device 11 is according to the effective resistance value of this deviate adjustment, and then the voltage of adjustment voltage conversion unit 1 output.
The technical scheme that above-described embodiment provides adopts detecting signal unit to detect the electrical power of voltage conversion unit output, and calculate and analyze according to the electrical power of the voltage conversion unit output that detects by control unit, adjust the electrical power that assembly is adjusted voltage conversion unit output by the electromotive power output in the voltage conversion unit, can make the electrical power of output keep constant.If the power supply that employing above-described embodiment provides as the power supply of houselights, then can make the power of houselights keep constant, and then makes illumination keep constant, improve accuracy of detection.Certainly, the power supply that present embodiment provides also can be powered for other need the power consumption equipment of constant electrical power input, such as equipment such as heaters.
And above-mentioned power supply also can be transformed into constant-current supply by adjustment, for load provides constant output current.For example because the resistance of resistance device 221 is known, the voltage that single-chip microcomputer 31 receives resistance device 221 two ends that second voltage transducers 222 detect replace the flowing through electric current of resistance device 221, output current as voltage conversion unit 1, and compare with current setting value and to obtain deviate, offer voltage conversion unit 1 and be used for adjusting output current, to keep the constant electric current of power supply output.
On the basis of technique scheme, digital regulation resistance can be selected two or more series connection, to increase the adjustable range of effective resistance, and then the resolution of raising voltage conversion unit 1 electromotive power output adjusting, for optical precision measurement equipment provides more stable power supply, to guarantee that illumination is constant, improve certainty of measurement.
The structural representation of another power supply that Fig. 4 provides for the utility model embodiment.As shown in Figure 4, on the basis of technique scheme, control unit 3 can comprise single-chip microcomputer 31 and hardware multiplier 32.Hardware multiplier is connected with single-chip microcomputer with voltage detection device 21, current detecting device 22 respectively and is connected.
One of them input of hardware multiplier 32 is connected with voltage detection device 21, the voltage signal of voltage conversion unit 1 output that receiver voltage detection means 21 detects, another input of hardware multiplier 32 is connected with current detecting device 22, the current signal of voltage conversion unit 1 output that received current detection means 22 detects.Hardware multiplier 32 is made multiplication with voltage signal and current signal, obtains the electrical power alternate data, again the electrical power alternate data is sent to single-chip microcomputer 31.Single-chip microcomputer 31 compares electrical power alternate data and electrical power set point and obtains deviate.Perhaps, the result that single-chip microcomputer 31 will multiply each other makes division with the resistance of resistance device 221 again, obtains electrical power and compare with the electrical power set point obtaining deviate.Again or, can also comprise by shift unit and subtracter in the control unit 3 and consist of the hardware division device, make division with the voltage at resistance device 221 two ends of realizing second voltage transducer 222 is detected and the resistance of resistance device 221, obtain the electric current by resistance device 221, the voltage of voltage conversion unit 1 output that detects with the first voltage sensor 211 again multiplies each other by hardware multiplier 32, obtain the electrical power of voltage conversion unit 1 output, send to single-chip microcomputer 31, so that 31 pairs of these electrical power of single-chip microcomputer and electrical power set point compare, obtain deviate, the electrical power that is used for 1 output of control electromotive power output adjustment assembly adjustment voltage conversion unit keeps constant.Wherein electromotive power output is adjusted the scheme that the course of work of assembly can provide with reference to above-mentioned technology contents, repeats no more herein.
The technical scheme that the utility model provides adopts detecting signal unit to detect the signal of voltage conversion unit output, and calculate and analyze by the signal of control unit according to the voltage conversion unit output that detects, so that adjust output voltage in the voltage conversion unit, make the electrical power of output keep constant.If the power supply that employing the utility model provides as the power supply of houselights, then can make the power of houselights keep constant, and then makes illumination keep constant, improve accuracy of detection.
It should be noted that at last: above each embodiment is not intended to limit only in order to the technical solution of the utility model to be described; Although with reference to aforementioned each embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a power supply is characterized in that, comprising: voltage conversion unit, the detecting signal unit that is connected with described voltage conversion unit output, and the control unit that is connected with detecting signal unit with described voltage conversion unit;
The described voltage conversion unit of signal controlling that described control unit is configured to detect according to described detecting signal unit is exported constant output variable.
2. power supply according to claim 1 is characterized in that, described detecting signal unit comprises the electrical power detection components;
Described voltage conversion unit comprises electromotive power output adjustment assembly.
3. power supply according to claim 2, it is characterized in that described electromotive power output is adjusted assembly and comprised: the voltage resistance transformation device and the voltage regulation of electric power sources device that is connected with described voltage resistance variation device that are used for the voltage signal of described control unit output is converted to resistance signal;
Described voltage resistance transformation device is connected with described control unit.
4. power supply according to claim 3, it is characterized in that, described electrical power detection components comprises the voltage detection device for detection of described voltage conversion unit output end voltage, and for detection of the current detecting device of described voltage conversion unit output end current.
5. power supply according to claim 4 is characterized in that, described voltage detection device adopts first voltage sensor in parallel with described voltage conversion unit output.
6. power supply according to claim 5 is characterized in that, described current detecting device comprises the resistance device that is connected on described voltage conversion unit output, and the second voltage transducer in parallel with described resistance device.
7. power supply according to claim 6 is characterized in that, described resistance device is that resistance varies with temperature rate less than 30/1000000ths resistance.
8. arbitrary described power supply is characterized in that according to claim 1-7, and described control unit is single-chip microcomputer.
9. arbitrary described power supply is characterized in that according to claim 4-7, and described control unit comprises single-chip microcomputer and hardware multiplier;
Described hardware multiplier is connected with single-chip microcomputer with described voltage detection device, current detecting device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320237701 CN203261536U (en) | 2013-05-06 | 2013-05-06 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320237701 CN203261536U (en) | 2013-05-06 | 2013-05-06 | Power supply |
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| Publication Number | Publication Date |
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| CN203261536U true CN203261536U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320237701 Expired - Lifetime CN203261536U (en) | 2013-05-06 | 2013-05-06 | Power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073542A (en) * | 2016-11-18 | 2018-05-25 | 天津嘉深保科技发展有限公司 | A kind of Technological research big data filtrator |
| CN110989756A (en) * | 2019-12-05 | 2020-04-10 | 思瑞浦微电子科技（苏州）股份有限公司 | Low dropout regulator based on constant power protection |
-
2013
- 2013-05-06 CN CN 201320237701 patent/CN203261536U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073542A (en) * | 2016-11-18 | 2018-05-25 | 天津嘉深保科技发展有限公司 | A kind of Technological research big data filtrator |
| CN110989756A (en) * | 2019-12-05 | 2020-04-10 | 思瑞浦微电子科技（苏州）股份有限公司 | Low dropout regulator based on constant power protection |
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| C14 | Grant of patent or utility model | ||
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Address after: 100010 Beijing city Dongcheng District North Street No. 20 Patentee after: Beijing Jingyi Photoelectric Technology Research Institute Co.,Ltd. Address before: 100010 Beijing city Dongcheng District North Street No. 20 Patentee before: Beijing Institute of Opto-Electronic Technology |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |