CN203133161U - Light bar power measurement device - Google Patents
Light bar power measurement device Download PDFInfo
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- CN203133161U CN203133161U CN 201220742867 CN201220742867U CN203133161U CN 203133161 U CN203133161 U CN 203133161U CN 201220742867 CN201220742867 CN 201220742867 CN 201220742867 U CN201220742867 U CN 201220742867U CN 203133161 U CN203133161 U CN 203133161U
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Abstract
The utility model discloses a light bar power measurement device. The light bar power measurement device comprises a voltage measurement module, a current measurement module, a power calculation module, a power mean value calculation module, and an output power display module, wherein an input terminal of the voltage measurement module is connected with a light bar; an output terminal of the voltage measurement module is connected with a first input terminal of the power calculation module; an input terminal of the current measurement module is connected with the light bar; an output terminal of the current measurement module is connected with a second input terminal of the power calculation module; an output terminal of the power calculation module is connected with the output power display module and an input terminal of the power mean value calculation module; and an output terminal of the power mean value calculation module is connected with the output power display module. The light bar power measurement device is capable of recording and reading the instantaneous power and the mean power of the light bar in real time and realizing the accurate measuring of the power of the light bar; and the light bar power measurement device is simple and reasonable in structure, stable and reliable in work, and low in cost.
Description
Technical field
The utility model relates to TV technology, relates in particular to a kind of lamp bar power-measuring device.
Background technology
At present, more and more many LCD colour TV uses the backlight technology of LED, and its advantage is that the life-span is long, the power and energy saving, and it is convenient to drive.The LED-backlit scheme has two kinds, and a kind of is straight-down negative, by some LED lamps be placed directly in screen below; Another kind is side entering type, and some LED lamps are distributed in the periphery of screen, by light guide plate with lead uniformly LCD screen of light.Above-mentioned two kinds of schemes are all used very generally, normally several are composed in series the lamp bar to the LED lamp, a few cluster of lamps, ornamental bars are driven by one or many constant current driven IC and light then, usually utilize constant current source to realize driving, input voltage obtains one and the suitable output of lamp bar voltage by boosting, be the power supply of lamp bar by constant-current device then.Should verify the constant current accuracy and the reliability that drive in actual design and the production, again the performance of lamp bar is verified, therefore need measure the power input of lamp bar and the luminous flux of output in real time, so that whether optical property and the unit for electrical property parameters of checking lamp bar meet the demands.There has been at present integrating sphere can realize measurement to the total light flux of lamp bar, but the power of lamp bar is owing to the relation that drives can't directly be measured, the power of lamp bar can change with the variation of temperature, electric current simultaneously, therefore design both instantaneous powers of test lamp bar in real time of a kind of equipment, the measurement mechanism of average power that can measure the lamp bar simultaneously again is particularly important.
The utility model content
Fundamental purpose of the present utility model is to propose a kind of lamp bar power-measuring device, is intended to real time record and the instantaneous power and the average power that read the lamp bar, realizes the measurement to lamp bar power, to satisfy the requirement of lamp bar verification experimental verification.
In order to achieve the above object, the utility model proposes a kind of lamp bar power-measuring device, a kind of lamp bar of this lamp bar power-measuring device power-measuring device, this lamp bar power-measuring device comprises voltage measurement module, current measurement module, power computation module, power average value computing module and output power display module; Wherein:
The input end of described voltage measurement module connects described lamp bar, and output terminal is connected with the first input end of described power computation module; The input end of described current measurement module connects described lamp bar, and output terminal is connected with second input end of described power computation module; The output terminal of described power computation module is connected with described output power display module, and is connected with the input end of described power average value computing module; The output terminal of described power average value computing module connects described output power display module.
Preferably, described output power display module comprises that oscillograph and numeral show voltage table, and described oscillograph connects described power computation module, and described numeral shows that voltage table connects described power average value computing module.
Preferably, described voltage measurement module comprises first amplifier and first resistance; Described first amplifier's inverting input is connected with the positive pole of described lamp bar, the in-phase input end of described first amplifier is connected with the negative pole of described lamp bar, the output terminal of described first amplifier is connected with the first input end of described power computation module as the output terminal of described voltage measurement module; Described first resistance is connected between the output terminal and inverting input of described first amplifier.
Preferably, described voltage measurement module also comprises second resistance, the 3rd resistance and the 4th resistance; Described second resistance is connected between the positive pole of described first amplifier's inverting input and described lamp bar, described the 3rd resistance is connected between the negative pole of the in-phase input end of described first amplifier and described lamp bar, one end of described the 4th resistance is connected other end ground connection with the in-phase input end of described first amplifier.
Preferably, described lamp bar is connected between lamp bar feeder ear and the lamp bar driver module, and described current measurement module comprises sampling resistor, second amplifier and the 5th resistance; One end of described sampling resistor is divided into two-way, and one the tunnel is connected with the positive pole of described lamp bar, and another road is connected with described second amplifier's inverting input; The other end of described sampling resistor is divided into two-way, and one the tunnel connects described lamp bar driver module, and another road is connected with the in-phase input end of described second amplifier; The output terminal of described second amplifier is connected with second input end of described power computation module as the output terminal of described current measurement module; Described the 5th resistance is connected between the output terminal and inverting input of described second amplifier.
Preferably, described current measurement module also comprises the 6th resistance, the 7th resistance and the 8th resistance; Described second amplifier's inverting input connects described sampling resistor through described the 6th resistance, the in-phase input end of described second amplifier connects described sampling resistor through described the 7th resistance, one end of described the 8th resistance is connected other end ground connection with the in-phase input end of described first amplifier.
Preferably, described power computation module comprises multiplier, potentiometer and instantaneous power output terminal; First differential input end of described multiplier is connected with the output terminal of described first amplifier, second differential input end of described multiplier is connected with the output terminal of described second amplifier, first difference output end of described multiplier connects positive source and power cathode respectively by described potentiometer, and is connected to described oscillograph by described instantaneous power output terminal.
Preferably, described power computation module also comprises the 9th resistance, the tenth resistance, the 11 resistance and the 12 resistance; First parameter of described multiplier is set end and is connected described positive source through described the 9th resistance, and connect described power cathode through described the tenth resistance, second parameter of described multiplier is set end and is connected described positive source through described the 11 resistance, and connects power cathode through described the 12 resistance.
Preferably, described power average value computing module comprises the 3rd amplifier, the 4th amplifier, the 5th amplifier, the 13 resistance, an electric capacity and average power take-off; Described the 3rd amplifier's inverting input is connected to first difference output end of described multiplier, the in-phase input end of described the 3rd amplifier is connected to second difference output end of described multiplier, and the output terminal of the 3rd amplifier is connected with described the 4th amplifier's inverting input; The in-phase input end ground connection of described the 4th amplifier, the output terminal of described the 4th amplifier is connected with described the 5th amplifier's inverting input; The in-phase input end ground connection of described the 5th amplifier, the output terminal of described the 5th amplifier are connected to described numeral through described average power output terminal and show voltage table; Described the 13 resistance is connected between the output and inverting input of described the 4th amplifier; Described electric capacity is connected between the output and inverting input of described the 5th amplifier.
Preferably, described power average value computing module also comprises the 14 resistance, the 15 resistance and the 16 resistance; Described the 14 resistance is connected between first difference output end of described the 3rd amplifier's inverting input and described multiplier, described the 15 resistance is connected between second difference output end of the in-phase input end of described the 3rd amplifier and described multiplier, and the in-phase input end of described the 3rd amplifier is through described the 16 resistance eutral grounding.
The lamp bar power-measuring device that the utility model proposes, measure the positive pole of lamp bar and the voltage of negative pole by voltage measurement module, obtain first magnitude of voltage, by the electric current in the current measurement module measurement lamp bar, and sampling obtains second magnitude of voltage, power computation module multiplies each other first magnitude of voltage and second magnitude of voltage, and the magnitude of voltage behind the output multiplication, to obtain instantaneous power, simultaneously, the average power that the power average value computing module carries out the voltage after multiplying each other detection and amplifies back output lamp bar, instantaneous power and the average power of the real-time display lamp bar of output power display module.The utility model can record and read instantaneous power and the average power of lamp bar in real time, realization is to the measurement of lamp bar power, reach the requirement of lamp bar verification experimental verification, and, the utility model also has simple and reasonable, is easy to realize, uses flexibly, working stability is reliable, characteristics with low cost.
Description of drawings
Fig. 1 is the theory diagram of the utility model lamp bar power-measuring device preferred embodiment;
Fig. 2 is the electrical block diagram of the utility model lamp bar power-measuring device one embodiment.
The realization of the purpose of this utility model, functional characteristics and advantage will be in conjunction with the embodiments, and be described further with reference to accompanying drawing.
Embodiment
Further specify the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, Fig. 1 is the theory diagram of the utility model lamp bar power-measuring device 300 preferred embodiments.
Among the utility model embodiment, lamp bar power-measuring device 300 comprises voltage measurement module 310, current measurement module 320, power computation module 330, power average value computing module 340 and output power display module 350.
Wherein, the input end of voltage measurement module 310 connects lamp bar 100, and voltage measurement module 310 is measured the positive pole of lamp bar 100 and the voltage of negative pole, obtains first magnitude of voltage, and the output terminal of voltage measurement module 310 is connected with the first input end of power computation module 330; The input end of current measurement module 320 connects lamp bar 100, the electric current that current measurement module 320 is measured in the lamp bar 100, and sampling obtains second magnitude of voltage, the output terminal of current measurement module 320 is connected with second input end of power computation module 330, power computation module 330 multiplies each other first magnitude of voltage and second magnitude of voltage, and the magnitude of voltage behind the output multiplication, to obtain instantaneous power; The output terminal of power computation module 330 is connected with output power display module 350, and the output terminal of power computation module 330 is connected with the input end of power average value computing module 340, and power average value computing module 340 carries out detection with the voltage after multiplying each other and amplifies the average power of back output lamp bar 100; The output terminal of power average value computing module 340 connects output power display module 350, and output power display module 350 is used for instantaneous power and the average power of display lamp bar 100 in real time.
With respect to prior art, lamp bar power-measuring device 300 of the present utility model is the instantaneous power of test lamp bar 100 in real time both, can measure the average power of lamp bar 100 again, realize the measurement to lamp bar 100 power, reach the requirement of lamp bar 100 verification experimental verifications, and, the utility model also has simple and reasonable, is easy to realize, uses flexibly, working stability is reliable, characteristics with low cost.
In conjunction with Fig. 1 and Fig. 2, wherein Fig. 2 is the electrical block diagram of the utility model lamp bar power-measuring device 300 1 embodiment.
In the present embodiment, output power display module 350 comprises that oscillograph (not shown) and numeral show the voltage table (not shown), oscillograph connects power computation module 330, utilize waveform to show the voltage signal of the expression instantaneous power of power computation module 330 output, numeral demonstration voltage table connects power average value computing module 340, and the voltage signal of instantaneous power signal demodulator with the expression average power of amplifying the back acquisition shown in digital form.
In the present embodiment, voltage measurement module 310 comprises that the first amplifier A1 and first resistance R, 1, the first amplifier A1 are operational amplifier; The inverting input of the first amplifier A1 is connected with the positive pole of lamp bar 100, the in-phase input end of the first amplifier A1 is connected with the negative pole of lamp bar 100, the output terminal of the first amplifier A1 is connected with the first input end of power computation module 330 as the output terminal of voltage measurement module 310; First resistance R 1 is connected between the output terminal and inverting input of the first amplifier A1, and first resistance R 1 is the feedback resistance of the first amplifier A1.
Particularly, voltage measurement module 310 also comprises second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4; Second resistance R 2 is connected between the positive pole of the inverting input of the first amplifier A1 and lamp bar 100, second resistance R 2 is the current-limiting resistance of the inverting input of the first amplifier A1, the 3rd resistance R 3 is connected between the negative pole of the in-phase input end of the first amplifier A1 and lamp bar 100, one end of the 4th resistance R 4 is connected with the in-phase input end of the first amplifier A1, the other end ground connection of the 4th resistance R 4, the 3rd resistance R 3 and the 4th resistance R 4 are the current-limiting resistance of the in-phase input end of the first amplifier A1.
In the present embodiment, lamp bar 100 is connected between lamp bar feeder ear HV and the lamp bar driver module 200; Current measurement module 320 comprises that sampling resistor RS, the second amplifier A2 and the 5th resistance R 5, the second amplifier A2 are operational amplifier; The end of sampling resistor RS is divided into two-way, and one the tunnel is connected with the positive pole of lamp bar 100, and another road is connected with the inverting input of the second amplifier A2; The other end of sampling resistor RS is divided into two-way, one the tunnel connects lamp bar driver module 200, another road is connected with the in-phase input end of the second amplifier A2, the electric current that flows through lamp bar 100 produces sampled voltage at sampling resistor RS, and sampling resistor RS goes up the sampled voltage of generation as the input voltage of the second amplifier A2; The output terminal of the second amplifier A2 is connected with second input end of power computation module 330 as the output terminal of current measurement module 320; The 5th resistance R 5 is connected between the output terminal and inverting input of the second amplifier A2, and the 5th resistance R 5 is the feedback resistance of the second amplifier A2.
Particularly, current measurement module 320 also comprises the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8; The inverting input of the second amplifier A2 connects sampling resistor RS through the 6th resistance R 6, the 6th resistance R 6 is the current-limiting resistance of the inverting input of the second amplifier A2, the in-phase input end of the second amplifier A2 connects sampling resistor RS through the 7th resistance R 7, one end of the 8th resistance R 8 is connected with the in-phase input end of the first amplifier A1, the other end ground connection of the 8th resistance R 8, the 7th resistance R 7 and the 8th resistance R 8 are the current-limiting resistance of the in-phase input end of the second amplifier A2.
In the present embodiment, power computation module 330 comprises multiplier U1, potentiometer RW and instantaneous power output terminal VI; Multiplier U1 is an aanalogvoltage multiplier integrated circuit, first differential input end of multiplier U1 is connected with the output terminal of the first amplifier A1, second differential input end of multiplier U1 is connected with the output terminal of the second amplifier A2, first difference output end of multiplier U1 connects positive source VCC+ and power cathode VCC-respectively by potentiometer RW, and is connected to oscillograph by instantaneous power output terminal VI.
Particularly, power computation module 330 comprises the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11 and the 12 resistance R 12; First parameter of multiplier U1 is set end and is connected positive source VCC+ through the 9th resistance R 9, and connect power cathode VCC-through the tenth resistance R 10, second parameter of multiplier U1 is set end and is connected positive source VCC+ through the 11 resistance R 11, and connects power cathode VCC-through the 12 resistance R 12.In the present embodiment, according to multiplier U1 parameter designing needs, suitably select the resistance of the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11 and the 12 resistance R 12, set the correlation parameter of multiplier U1 by the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11 and the 12 resistance R 12.
In the present embodiment, power average value computing module 340 comprises the 3rd amplifier A3, the 4th amplifier A4, the 5th amplifier A5, the 13 resistance R 13, capacitor C 1 and average power take-off VA, and wherein the 3rd amplifier A3, the 4th amplifier A4 and the 5th amplifier A5 are operational amplifier; The inverting input of the 3rd amplifier A3 is connected to first difference output end of multiplier U1, the in-phase input end of the 3rd amplifier A3 is connected to second difference output end of multiplier U1, and the output terminal of the 3rd amplifier A3 is connected with the inverting input of the 4th amplifier A4; The in-phase input end ground connection of the 4th amplifier A4, the output terminal of the 4th amplifier A4 is connected with the inverting input of the 5th amplifier A5; The in-phase input end ground connection of the 5th amplifier A5, the output terminal of the 5th amplifier A5 are connected to numeral through average power output terminal VA and show voltage table; The 13 resistance R 13 is connected between the output and inverting input of the 4th amplifier A4, and the 13 resistance R 13 is the feedback resistance of the 4th amplifier A4; Capacitor C 1 is connected in that capacitor C 1 is the feedback capacity of the 5th amplifier A5 between the output of the 5th amplifier A5 and the inverting input.
Particularly, power average value computing module 340 also comprises the 14 resistance R 14, the 15 resistance R 15 and the 16 resistance R 16; The 14 resistance R 14 is connected between first difference output end of the inverting input of the 3rd amplifier A3 and multiplier U1, the 14 resistance R 14 is the current-limiting resistance of the inverting input of the 3rd amplifier A3, the 15 resistance R 15 is connected between second difference output end of the in-phase input end of the 3rd amplifier A3 and multiplier U1, the in-phase input end of the 3rd amplifier A3 is through the 16 resistance R 16 ground connection, and the 15 resistance R 15 and the 16 resistance R 16 are the current-limiting resistance of the in-phase input end of the 3rd amplifier A3.
The specific descriptions of the circuit working principle of the utility model power-measuring device 300 are as follows:
After handling through boosting, supply voltage is 100 power supplies of lamp bar, the LED that lamp bar driver module 200 drives in the lamp bar 100 lights, in the voltage measurement module 310, the inverting input of the first amplifier A1 and in-phase input end are connected positive pole and the negative pole of lamp bar 100 respectively, the both positive and negative polarity voltage of the lamp bar 100 of the first amplifier A1 is measured, be over the ground first magnitude of voltage with the voltage transformation of lamp bar 100 both positive and negative polarities, and export multiplier U1 to; In the current measurement module 320, sampling resistor RS connects with lamp bar 100, the electric current of flowing through lamps bar 100 also flows through sampling resistor RS, sampling resistor RS is voltage with the current transformation in the lamp bar 100, the inverting input of the second amplifier A2 and in-phase input end are connected the two ends of sampling resistor RS respectively, the second amplifier A2 measures the voltage that produces at sampling resistor RS two ends, it is transformed to over the ground second magnitude of voltage, and exports multiplier U1 to; Multiplier U1 multiplies each other first magnitude of voltage and second magnitude of voltage, the voltage signal of output expression power, instantaneous power at instantaneous power output terminal VI output lamp bar 100 shows the voltage waveform of expression instantaneous power at oscillograph, and then realizes showing in real time lamp bar 100 instantaneous powers; Because multiplier U1 is difference output, therefore the voltage signal of its output is differential voltage, the 3rd amplifier A3 is transformed to over the ground differential mode voltage with this differential voltage, the one-level see-saw circuit that the 4th amplifier A4 the 13 resistance R 13 constitutes in the power average value computing module 340, the 5th amplifier A5 and capacitor C 1 constitute an integrating circuit, be the secondary see-saw circuit in the power average value computing module 340, the 4th amplifier A4 and the 5th amplifier A5 handle the differential mode voltage of output, make that the voltage-phase of output is identical with the voltage-phase of importing, to calculate the average power of lamp bar 100, average power at average power output terminal VA output lamp bar 100, therefore show that in numeral voltage table shows the magnitude of voltage of expression average power, and then realize the real-time demonstration to the average power of lamp bar 100.
The lamp bar power-measuring device 300 that the utility model proposes, by measuring the both positive and negative polarity voltage of lamp bar 100, obtain first magnitude of voltage, by the electric current in the measurement lamp bar 100, and sampling obtains second magnitude of voltage, first magnitude of voltage and second magnitude of voltage are multiplied each other, and the magnitude of voltage behind the output multiplication, to obtain instantaneous power, simultaneously, the average power that voltage after multiplying each other is carried out detection and amplifies back output lamp bar 100, and instantaneous power and the average power of real-time display lamp bar 100.The utility model can record and read instantaneous power and the average power of lamp bar 100 in real time, realization is to the accurate measurement of lamp bar 100 power, reach the requirement of lamp bar 100 verification experimental verifications, and, the utility model also has simple and reasonable, is easy to realize, uses flexibly, working stability is reliable, characteristics with low cost.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. a lamp bar power-measuring device is characterized in that, comprises voltage measurement module, current measurement module, power computation module, power average value computing module and output power display module; Wherein:
The input end of described voltage measurement module connects the lamp bar, and output terminal is connected with the first input end of described power computation module; The input end of described current measurement module connects described lamp bar, and output terminal is connected with second input end of described power computation module; The output terminal of described power computation module is connected with described output power display module, and is connected with the input end of described power average value computing module; The output terminal of described power average value computing module connects described output power display module.
2. lamp bar power-measuring device as claimed in claim 1, it is characterized in that, described output power display module comprises that oscillograph and numeral show voltage table, and described oscillograph connects described power computation module, and described numeral shows that voltage table connects described power average value computing module.
3. lamp bar power-measuring device as claimed in claim 1 is characterized in that, described voltage measurement module comprises first amplifier and first resistance; Described first amplifier's inverting input is connected with the positive pole of described lamp bar, the in-phase input end of described first amplifier is connected with the negative pole of described lamp bar, the output terminal of described first amplifier is connected with the first input end of described power computation module as the output terminal of described voltage measurement module; Described first resistance is connected between the output terminal and inverting input of described first amplifier.
4. lamp bar power-measuring device as claimed in claim 3 is characterized in that, described voltage measurement module also comprises second resistance, the 3rd resistance and the 4th resistance; Described second resistance is connected between the positive pole of described first amplifier's inverting input and described lamp bar, described the 3rd resistance is connected between the negative pole of the in-phase input end of described first amplifier and described lamp bar, one end of described the 4th resistance is connected other end ground connection with the in-phase input end of described first amplifier.
5. lamp bar power-measuring device as claimed in claim 1 is characterized in that, described lamp bar is connected between lamp bar feeder ear and the lamp bar driver module, and described current measurement module comprises sampling resistor, second amplifier and the 5th resistance; One end of described sampling resistor is divided into two-way, and one the tunnel is connected with the positive pole of described lamp bar, and another road is connected with described second amplifier's inverting input; The other end of described sampling resistor is divided into two-way, and one the tunnel connects described lamp bar driver module, and another road is connected with the in-phase input end of described second amplifier; The output terminal of described second amplifier is connected with second input end of described power computation module as the output terminal of described current measurement module; Described the 5th resistance is connected between the output terminal and inverting input of described second amplifier.
6. lamp bar power-measuring device as claimed in claim 5 is characterized in that, described current measurement module also comprises the 6th resistance, the 7th resistance and the 8th resistance; Described second amplifier's inverting input connects described sampling resistor through described the 6th resistance, the in-phase input end of described second amplifier connects described sampling resistor through described the 7th resistance, one end of described the 8th resistance is connected other end ground connection with the in-phase input end of described first amplifier.
7. as each described lamp bar power-measuring device in the claim 1 to 6, it is characterized in that described power computation module comprises multiplier, potentiometer and instantaneous power output terminal; First differential input end of described multiplier is connected with the output terminal of described first amplifier, second differential input end of described multiplier is connected with the output terminal of described second amplifier, first difference output end of described multiplier connects positive source and power cathode respectively by described potentiometer, and is connected to described oscillograph by described instantaneous power output terminal.
8. lamp bar power-measuring device as claimed in claim 7 is characterized in that, described power computation module also comprises the 9th resistance, the tenth resistance, the 11 resistance and the 12 resistance; First parameter of described multiplier is set end and is connected described positive source through described the 9th resistance, and connect described power cathode through described the tenth resistance, second parameter of described multiplier is set end and is connected described positive source through described the 11 resistance, and connects power cathode through described the 12 resistance.
9. lamp bar power-measuring device as claimed in claim 7 is characterized in that, described power average value computing module comprises the 3rd amplifier, the 4th amplifier, the 5th amplifier, the 13 resistance, an electric capacity and average power take-off; Described the 3rd amplifier's inverting input is connected to first difference output end of described multiplier, the in-phase input end of described the 3rd amplifier is connected to second difference output end of described multiplier, and the output terminal of the 3rd amplifier is connected with described the 4th amplifier's inverting input; The in-phase input end ground connection of described the 4th amplifier, the output terminal of described the 4th amplifier is connected with described the 5th amplifier's inverting input; The in-phase input end ground connection of described the 5th amplifier, the output terminal of described the 5th amplifier are connected to described numeral through described average power output terminal and show voltage table; Described the 13 resistance is connected between the output and inverting input of described the 4th amplifier; Described electric capacity is connected between the output and inverting input of described the 5th amplifier.
10. lamp bar power-measuring device as claimed in claim 9 is characterized in that, described power average value computing module also comprises the 14 resistance, the 15 resistance and the 16 resistance; Described the 14 resistance is connected between first difference output end of described the 3rd amplifier's inverting input and described multiplier, described the 15 resistance is connected between second difference output end of the in-phase input end of described the 3rd amplifier and described multiplier, and the in-phase input end of described the 3rd amplifier is through described the 16 resistance eutral grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742867 CN203133161U (en) | 2012-12-28 | 2012-12-28 | Light bar power measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742867 CN203133161U (en) | 2012-12-28 | 2012-12-28 | Light bar power measurement device |
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| CN203133161U true CN203133161U (en) | 2013-08-14 |
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| CN 201220742867 Expired - Fee Related CN203133161U (en) | 2012-12-28 | 2012-12-28 | Light bar power measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051443A (en) * | 2020-10-29 | 2020-12-08 | 国网河北省电力有限公司 | Device for measuring electric power |
| CN112257371A (en) * | 2020-10-29 | 2021-01-22 | 国网河北省电力有限公司 | Power grid transmission line analysis system |
-
2012
- 2012-12-28 CN CN 201220742867 patent/CN203133161U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112051443A (en) * | 2020-10-29 | 2020-12-08 | 国网河北省电力有限公司 | Device for measuring electric power |
| CN112257371A (en) * | 2020-10-29 | 2021-01-22 | 国网河北省电力有限公司 | Power grid transmission line analysis system |
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Granted publication date: 20130814 Termination date: 20201228 |