CN101930026A - Electronic device with power loss detection function - Google Patents
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- CN101930026A CN101930026A CN200910146734XA CN200910146734A CN101930026A CN 101930026 A CN101930026 A CN 101930026A CN 200910146734X A CN200910146734X A CN 200910146734XA CN 200910146734 A CN200910146734 A CN 200910146734A CN 101930026 A CN101930026 A CN 101930026A
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Abstract
The invention relates to an electronic device with a power loss detection function, which belongs to the field of electronics. A voltage and a current are detected between a rectifier of a power supply and a direct current (DC)-DC converter, and the detected voltage and the detected current are multiplied to obtain detection power corresponding to the magnitude of energy consumed by a load, and then corresponding power loss, namely, the magnitude of power extracted by the load is searched from a look-up table according to the detection power and displayed. Therefore, the electronic device with the power loss detection function of the invention can allow a user to obtain the current power loss of the electronic device under a limited cost condition without an additional power measuring instrument.
Description
Technical field
The present invention relates to electronic applications, particularly a kind of electronic installation with power loss detection function.
Background technology
Power supply unit aims to provide load one stable power and deals with changeable transient change response, and the big young pathbreaker of the energy that load consumed is determined by charge capacity.For example, when power supply unit provides a stable and magnitude of voltage to be the output voltage of V because the change that charge capacity can not stopped and charge capacity can be considered as a variable resistance value R, thus power supply unit the power of load is provided is V
2/ R.Under the output energy range that power supply unit is allowed, no matter where charge capacity is as changing, power supply unit all can provide a stable and constant output voltage to load.Existing power supply unit also provides the additional function of overcurrent protection or overvoltage protection usually except power supply is provided, these two functions mainly are used for protecting power supply unit and load when load short circuits or open circuit.But existing power supply unit does not provide power input is detected.
The common practice of manufacturer is after power supply unit is installed up to electronic installation, the power of sending into by the power measurement instrument detecting power supply unit input end of precision, these accurate power measurement instruments are expensive and heavy, and are not suitable for being installed up to the cheap consumer electronic device sale of price general charged.And manufacturer only can indicate maximal value and/or minimum value utilizing accurate power measurement instrument detecting electronic installation power attenuation with after verifying whether electronic installation meets design being marked with for power attenuation of electronic installation.If the user by extra power measurement instrument detecting, can't not learn the power attenuation that electronic installation is current.
Summary of the invention
In view of this, in order to realize allowing the user under the limited cost condition, do not need by extra power measurement instrument, just can the current power attenuation of electron gain device, the present invention proposes a kind of electronic installation with power loss detection function, described technical scheme is as follows:
A kind of electronic installation with power loss detection function, described electronic installation comprises: rectifier, voltage-level detector, current detector, DC-DC converter, analog multiplier, analog-to-digital converter, microcontroller; Wherein,
Described rectifier is used for received AC power is converted to direct current;
Described voltage-level detector is coupled to described rectifier, is used to detect described galvanic voltage, and output relevant detection voltage;
Described current detector is coupled to described rectifier, is used to detect described galvanic electric current, and output relevant detection electric current;
Described DC-DC converter is coupled to described rectifier by described current detector, and being used for described galvanic voltage transitions is output voltage, and load is given in power supply;
Described analog multiplier is coupled to described voltage-level detector and described current detector, is used for described detection voltage and described detection electric current are multiplied each other, and the output detection power;
Described analog-to-digital converter is coupled to described analog multiplier, is used for described detection power is converted to digital form from analog form;
Described microcontroller is coupled to described analog-to-digital converter, is used for finding out corresponding power attenuation according to the described detection power of digital form from look-up table, and shows.
Described voltage-level detector comprises: two first resistors that are connected in series; Wherein,
Described two first resistor, one ends that are connected in series are coupled to described rectifier, receiving described direct current, and other end ground connection, the common joint of described two first resistors that are connected in series is exported described detection voltage.
Described voltage-level detector comprises: two capacitor connected in series; Wherein,
Described two capacitor connected in series, one end is coupled to described rectifier, receiving described direct current, and other end ground connection, the common joint of described two capacitor connected in series is exported described detection voltage.
Described current detector comprises: the 3rd resistor, differential amplifier that second resistor, two that detection resistor, two is connected in series is connected in series; Wherein,
Described detection resistor has first end and second end, and described first end is coupled to described rectifier, and to receive described direct current, described second end is coupled to described DC-DC converter;
Described two second resistor, one ends that are connected in series are coupled to first end of described detection resistor, and other end ground connection;
Described two the 3rd resistor one ends that are connected in series are coupled to second end of described detection resistor, and other end ground connection;
Described differential amplifier, the magnitude of voltage that is used for the 3rd resistor common joint output that the magnitude of voltage and described two with the described two second resistor common joints outputs that are connected in series is connected in series is poor, and with the voltage difference amplification that obtains, to export described detection electric current.
Described current detector comprises: current transformer or hall current detector.
A kind of electronic installation with power loss detection function, described electronic installation comprises: rectifier, voltage-level detector, current detector, DC-DC converter, first analog-to-digital converter, second analog-to-digital converter, digital multiplier microcontroller; Wherein,
Described rectifier is used for received AC power is converted to direct current;
Described voltage-level detector is coupled to described rectifier, is used to detect described galvanic voltage, and output relevant detection voltage;
Described current detector is coupled to described rectifier, is used to detect described galvanic electric current, and output relevant detection electric current;
Described DC-DC converter is coupled to described rectifier by described current detector, and being used for described galvanic voltage transitions is output voltage, and load is given in power supply;
Described first analog-to-digital converter is coupled to described voltage-level detector, is used for described detection voltage is converted to digital form from analog form;
Described second analog-to-digital converter is coupled to described current detector, is used for described detection electric current is converted to digital form from analog form;
Described digital multiplier is coupled to described first analog-to-digital converter and described second analog-to-digital converter, is used for the described detection voltage of digital form and the described detection electric current of digital form are multiplied each other, and the output detection power;
Described microcontroller is coupled to described digital multiplier, is used for finding out corresponding power attenuation according to described detection power from look-up table, and shows.
Described voltage-level detector comprises: two first resistors that are connected in series; Wherein,
Described two first resistor, one ends that are connected in series are coupled to described rectifier receiving described direct current, and other end ground connection, and the described two first resistor common joints that are connected in series are exported described detection voltage.
Described voltage-level detector comprises: two capacitor connected in series; Wherein,
Described two capacitor connected in series, one end is coupled to described rectifier receiving described direct current, and other end ground connection, and described two capacitor connected in series common joints are exported described detection voltage.
Described current detector comprises: the 3rd resistor, differential amplifier that second resistor, two that detection resistor, two is connected in series is connected in series; Wherein,
Described detection resistor has first end and second end, and described first end is coupled to described rectifier to receive described direct current, and described second end is coupled to described DC-DC converter;
Described two second resistors that are connected in series, described two second resistor, one ends that are connected in series are coupled to described detection resistor first end, and other end ground connection;
Described two the 3rd resistors that are connected in series, described two the 3rd resistor one ends that are connected in series are coupled to described detection resistor second end, and other end ground connection;
Described differential amplifier, the magnitude of voltage that is used for the 3rd resistor common joint output that the magnitude of voltage and described two with the described two second resistor common joints outputs that are connected in series is connected in series is poor, and with the voltage difference amplification that obtains, to export described detection electric current.
Described current detector comprises: current transformer or hall current detector.
Electronic installation with power loss detection function provided by the present invention does not need by extra power measurement instrument, under the limited cost condition, allows the user can get the current power attenuation of electronic installation, uses simple, convenient.
Description of drawings
In order to make those skilled in the art further understand feature of the present invention and technology contents, see also followingly about detailed description of the present invention and accompanying drawing, accompanying drawing only is used to provide reference and explanation, is not to be used for limiting the present invention.
Fig. 1 is the block scheme of the electronic installation with power loss detection function that provides of the embodiment of the invention 1;
Fig. 2 is a particular circuit configurations synoptic diagram of the electronic installation with power loss detection function that provides of the embodiment of the invention 1;
Fig. 3 is that the electronic installation with power loss detection function that the embodiment of the invention 1 provides is controlled the sequential chart that A/D converter is exported the detection power of digital form by clock signal;
Fig. 4 is the block scheme of the electronic installation with power loss detection function that provides of the embodiment of the invention 2.
In the accompanying drawing, the list of parts of each label representative is as follows:
1,1 '-power supply unit, 11,11 '-rectifier, 12,12 '-voltage-level detector, 13,13 '-current detector, the 14-DC-DC converter, the 15-analog multiplier, the 16-analog-to-digital converter, 2-electronic installation, 21-load, the 22-mainboard, the 221-microcontroller, 222-look-up table, 4-power supply unit, the 45-digital multiplier, 46-first analog-to-digital converter, 47-second analog-to-digital converter, 5-electronic installation, the BD1-bridge rectifier, the C1-capacitor, OC1, the OC2-photo-coupler, the OP1-operational amplifier, PD1, the PD2-light-emitting device, PT1, the PT2-photodetector, Q1-switch, R1～R15-resistor, Rsen-detects resistor, the L-live wire, N-zero line, Clk-clock signal, the galvanic electric current of Idc-, the detection electric current of Isen-analog form, the detection electric current of Isen '-digital form, the detection power of Psen-analog form, the detection power of Psen '-digital form, the Vac-AC power, the galvanic voltage of Vdc-, Vout-output voltage, the detection voltage of Vsen-analog form, the detection voltage of Vsen '-digital form.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment 1
Fig. 1 is the block scheme of the electronic installation with power loss detection function that provides of the embodiment of the invention 1.Please refer to Fig. 1, the electronic installation 2 with power loss detection function comprises: power supply unit 1, load 21 and mainboard (main board) 22.
Wherein, power supply unit 1 is in order to receiving AC power Vac, and is converted into the output voltage V out of direct current, gives load 21 and mainboard 22 with power supply.
In the present embodiment, wherein, power supply unit 1 comprises that rectifier 11, voltage-level detector 12, current detector 13, dc-dc (DC/DC) converter 14, analog multiplier 15 and simulation are to numeral (A/D) converter 16.Wherein, load 21 is assemblies that all except mainboard 22 need power supply unit 1 power supply in the electronic installation 2.For example, if electronic installation 2 be LCD TV, then load 21 comprise transverter in order to the driving cathode fluorescent tube, in order to the circuit of processing audio and video and loudspeaker etc.Mainboard 22 is used to control the running of electronic installation 2, and it also need be by power supply unit 1 power supply, so also be the load of power supply unit 1.In the present embodiment, mainboard 22 comprises microcontroller 221 and look-up table 222.
Wherein, the rectifier 11 AC power Vac that is used for being received is converted to direct current; Voltage-level detector 12 is coupled to rectifier 11, is used to detect the galvanic voltage Vdc of rectifier 11 outputs, and output relevant detection voltage Vsen; Current detector 13 is coupled to rectifier 11, is used to detect the galvanic electric current I dc of rectifier 11 outputs, and output relevant detection electric current I sen; DC/DC converter 14 is coupled to rectifier 11 by current detector 13, is used for the galvanic voltage Vdc of rectifier 11 outputs is converted to the output voltage V out of direct current, gives load 21 and mainboard 22 with power supply; Analog multiplier 15 is coupled to voltage-level detector 12 and current detector 13, is used for detection voltage Vsen and detects electric current I sen multiplying each other, and the detection power Psen of output analog form; A/D converter 16 is coupled to analog multiplier 15, is used for the detection power Psen of analog form is converted to the detection power Psen ' of digital form; Microcontroller 221 is coupled to A/D converter 16, is used for the detection power Psen ' according to digital form, finds out corresponding power attenuation from look-up table 222, and shows.
Fig. 2 is a particular circuit configurations synoptic diagram of the electronic installation with power loss detection function 2 that provided of the embodiment of the invention 1.Please refer to Fig. 2, the electronic installation 2 ' with power loss detection function comprises power supply unit 1 ', load 21 and mainboard 22.Wherein, power supply unit 1 ' comprises rectifier 11 ', voltage-level detector 12 ', current detector 13 ', DC/DC converter 14, analog multiplier 15 and A/D converter 16, and mainboard 22 comprises microcontroller 221 and look-up table 222.At this, the identical person with element numbers shown in Figure 1 of element numbers shown in Figure 2 represents identical assembly.
Its voltage of AC power Vac that general city uses is the high pressure of 90～264Vrms, so the rectifier 11 ' as shown in Figure 2 that adopts carries out alternating current to galvanic conversion more.The capacitor C1 that rectifier 11 ' comprises bridge rectifier BD1 and has big capacitance.Bridge rectifier BD1 is a kind of full wave rectifier, utilizes four diodes to be connected into the electric bridge form, makes bridge rectifier BD1 all have electric current to flow through in the positive-negative half-cycle of AC power Vac voltage, and forms unidirectional all-wave pulsating dc voltage at output terminal.On bridge rectifier BD1 end points, indicate usually "～", "+", "-" symbol are arranged, the two-end-point that wherein is denoted as "～" symbol is the alternating current input end, be coupled to live wire (live wire) L and zero line (neutral wire) N of the AC power Vac that uses in the city respectively, and the two-end-point that is denoted as "+", "-" symbol is a DC output end, and it is coupled to capacitor C1 two ends respectively.Capacitor C1 is used for the all-wave pulsating dc voltage is carried out filtering, the voltage ripple is reduced and becomes the voltage Vdc of galvanic current.
Voltage-level detector 12 ' comprises two first resistor R 1 and the R2 that are connected in series.An end was coupled to rectifier 11 ' after first resistor R 1 and R2 were connected in series, and was used to receive the galvanic voltage Vdc of rectifier 11 ' output, the other end ground connection after resistor R 1 and R2 are connected in series; Therefore, two ends were coupled to capacitor C1 two ends (or bridge rectifier BD1 is denoted as the DC output end of "+", "-" symbol) respectively after first resistor R 1 and R2 were connected in series.Two first resistor R 1 that are connected in series and R2 carry out dividing potential drop to the voltage of capacitor C1 end, and detect voltage Vsen in first resistor R 1 and the output of R2 common joint.Because capacitor C1 terminal voltage is the galvanic voltage Vdc of rectifier 11 ' output, so detection voltage Vsen and galvanic voltage Vdc are proportional.In design, the resistance value of the R2 of the resistance value of the R1 in first resistor in first resistor makes the level that detects voltage Vsen be applicable to the processing of subsequent conditioning circuit.Wherein, R1 in first resistor shown in Figure 2 and R2 can also be replaced with capacitor C1 and C2 respectively, the capacitance of at this moment necessary design capacitance device C1 makes the level that detects voltage Vsen be applicable to the processing of subsequent conditioning circuit much smaller than the capacitance of capacitor C2.
Wherein, current detector 13 ' comprising: detect the 3rd resistor R 5 and the R6 that resistor R sen, two second resistor R 3 that are connected in series and R4 and two are connected in series.Wherein, detect resistor R sen and have first end and second end, be used for the galvanic electric current I dc of rectifier 11 ' output is converted to correspondent voltage, this magnitude of voltage promptly is the difference that detects resistor R sen first terminal voltage and second terminal voltage.Detect resistor R sen first end and be coupled to rectifier 11 ', be used to receive the galvanic electric current I dc of output, detect the input end that resistor R sen second end is coupled to DC/DC converter 14; Therefore, detect the end (or bridge rectifier BD1 is denoted as the DC output end of "+" symbol) that resistor R sen first end is coupled to the non-ground connection of capacitor C1.An end was coupled to and detects resistor R sen first end after second resistor R 3 and R4 were connected in series, other end ground connection after R3 and R4 are connected in series, so second resistor R 3 and R4 carry out dividing potential drop to detecting resistor R sen first terminal voltage, and detect voltage in second resistor R 3 and R4 common joint output first.An end was coupled to and detects resistor R sen second end after the 3rd resistor R 5 and R6 were connected in series, other end ground connection after the 3rd resistor R 5 and R6 are connected in series, so the 3rd resistor R 5 and R6 carry out dividing potential drop to detecting resistor R sen second terminal voltage, and detect voltage in the 3rd resistor R 5 and R6 common joint output second.At last, by differential amplifier (wherein, formed by operational amplifier OP1 and resistor R 7～R10) detect first and export as detecting electric current I sen after voltage and second detects both difference amplifications of voltage, be voltage form and proportional so detect electric current I sen with galvanic electric current I dc.Wherein, current detector can also be replaced with current transformer or Hall (Hall) current detector.
Because the galvanic voltage Vdc of rectifier 11 ' output and electric current I dc are direct current signals because the filtering by the capacitor C1 in it obtains, so virtual work problem that does not have the AC signal phase angle difference to be produced, and electronic installation 2 ' can't take the virtual work rope when measuring the valuation of power or electric weight, therefore detects the real power that can be simplified most by filtered voltage Vdc of capacitor C1 and electric current I dc.In addition, owing to often comprise a transformer in the DC/DC converter 14, because transformer has the electrical isolation function, make that rectifier 11 ', voltage-level detector 12 ', current detector 13 ', analog multiplier 15 and A/D converter 16 are to be positioned on high-tension side assembly, and load 21 and mainboard 22 are the assemblies that are positioned at low-pressure side.Owing to be arranged in the microcontroller 221 that on high-tension side A/D converter 16 will be sent to the detection power Psen ' of digital form the mainboard 22 that is positioned at low-pressure side, must finish by photo-coupler OC1 as shown in Figure 2.Similarly, the clock signal C lk of 221 outputs of the microcontroller in the mainboard 22 also must be sent to A/D converter 16 by photo-coupler OC2 as shown in Figure 2.
Fig. 3 is that the electronic installation with power loss detection function 2 ' that the embodiment of the invention 1 provides is controlled the sequential chart that A/D converter 16 is exported the detection power Psen ' of digital forms by clock signal C lk.Please be simultaneously with reference to Fig. 2 and Fig. 3, for example, the scope of the value of the detection power Psen of analog form is 0～30W, and the value of the detection power Psen ' of digital form is 8 bit data, promptly represent the detection power Psen ' of a digital form with 8 binary digit D7～D0, the scope of its value is 00000000～11111111.The detection power Psen of received analog form is converted to output at once behind the detection power Psen ' of digital form when A/D converter 16, but after waiting for that microprocessor 221 in the mainboard 22 is sent a clock signal C lk, A/D converter 16 ability are delivered to microprocessor 221 with the one digit number certificate of the detection power Psen ' of digital form, for example successively by MSB (Most Significant Bit, highest significant position) order of D7 to LSB (Least Significant Bit, least significant bit (LSB)) D0 transmits the data on all.
In the present embodiment, the clock signal C lk that microprocessor 221 in the mainboard 22 is sent is a high level, the conducting that this high level comes gauge tap Q1 by current limliting and the dividing potential drop of resistor R 13 and R14, after the conducting of gauge tap Q1, voltage is that the switch Q1 of direct supply by resistor R 12 and conducting of 5V inserts the light-emitting device PD2 among the photo-coupler OC2, owing to there is electric current to flow through, therefore light-emitting device PD2 is luminous, and the photodetector PT2 among the photo-coupler OC2 is because of detecting the light conducting, so A/D converter 16 receives the low level that produces because of ground connection and the data on the position of the detection power Psen ' of digital form are delivered to microprocessor 221 by photo-coupler OC1.In addition, when microprocessor 221 does not send clock signal C lk, microprocessor 221 can be transformed into output low level, this low level gauge tap Q1 disconnects, because this moment, gauge tap Q1 disconnected, voltage be 5V direct supply can not be linked into light-emitting device PD2, therefore light-emitting device PD2 can not be luminous because of there not being electric current to flow through, photodetector PT2 among the photo-coupler OC2 disconnects less than light because of detecting, so the voltage that A/D converter 16 receives is the direct supply of 5V, produce high level by resistor R 15, and no longer transfer data in the microprocessor 221.
After microprocessor 221 is sent 8 clock signal C lk (being denoted as 1～8 clock signal C lk as shown in Figure 3), microprocessor 221 promptly can be received the detection power Psen ' of a complete digital form, can from look-up table 222, find corresponding power attenuation value this moment with the detection power Psen ' of above-mentioned digital form, and be shown to the user, make the user learn the power attenuation that electronic installation 2 ' is current, wherein, look-up table 222 is built in the nonvolatile memory of mainboard 22 (among the figure mark) in being in, and it is putting down in writing each the corresponding power attenuation value of numerical data institute between 00000000～11111111.For example, when the detection power Psen ' of the digital form of receiving when microprocessor 221 was 01001111, microprocessor 221 can find its corresponding power attenuation value from look-up table 222 be 9.2575W.
Fig. 4 is the block scheme of the electronic installation with power loss detection function that provides of the embodiment of the invention 2.Please refer to Fig. 4, the electronic installation 5 with power loss detection function comprises power supply unit 4, load 21 and mainboard 22.Wherein, power supply unit 4 comprises rectifier 11, voltage-level detector 12, current detector 13, DC/DC converter 14, extremely digital (A/D) converter 46 of first simulation, second simulation to numeral (A/D) converter 47 and digital multiplier 45, and mainboard 22 comprises microcontroller 221 and look-up table 222.At this, the identical person with element numbers shown in Figure 1 of element numbers shown in Figure 4 represents identical assembly.
The AC power Vac that rectifier 11 is used for being received is converted to direct current.Voltage-level detector 12 is coupled to rectifier 11, is used to detect the galvanic voltage Vdc of rectifier 11 outputs, and output relevant detection voltage Vsen; Current detector 13 is coupled to rectifier 11, is used to detect the galvanic electric current I dc of rectifier 11 outputs, and output relevant detection electric current I sen; DC/DC converter 14 is coupled to rectifier 11 by current detector 13, and the output voltage V out that is converted to direct current in order to the galvanic voltage Vdc with rectifier 11 outputs gives load 21 and mainboard 22 with power supply; First A/D converter 46 is coupled to voltage-level detector 12, is used for the detection voltage Vsen of reception analog form is converted to the detection voltage Vsen ' of digital form; Second A/D converter 47 is coupled to current detector 13, is used for the detection electric current I sen of reception analog form is converted to the detection electric current I sen ' of digital form; Digital multiplier 45 is coupled to first A/D converter 46 and second A/D converter 47, is used for the detection voltage Vsen ' of digital form and the detection electric current I sen ' of digital form are multiplied each other, and the detection power Psen ' of output digital form; Microcontroller 221 is coupled to digital multiplier 45, and the detection power Psen ' that is used for digital form finds out corresponding power attenuation from look-up table 222, and shows.
In sum, electronic installation with power loss detection function of the present invention, between the rectifier of power supply unit and DC-DC converter, voltage and electric current are detected, and will detect voltage and electric current and multiply by the energy size relevant detection power that obtains being consumed mutually with load, from look-up table, find out corresponding power attenuation by microcontroller according to detection power then, this is the size of power that load is extracted, and shows.Therefore, the electronic installation with power loss detection function of the present invention does not need by extra power measurement instrument, under the limited cost condition, can allow the current power attenuation of user's electron gain device.
The above is the preferred embodiments of the present invention only, is not so promptly limits claim of the present invention, and every other equivalence of being done in characteristic range of the present invention changes or modifies, and all should be included in the claim of the present invention.
Claims (10)
1. the electronic installation with power loss detection function is characterized in that, described electronic installation comprises: rectifier, voltage-level detector, current detector, DC-DC converter, analog multiplier, analog-to-digital converter, microcontroller; Wherein,
Described rectifier is used for received AC power is converted to direct current;
Described voltage-level detector is coupled to described rectifier, is used to detect described galvanic voltage, and output relevant detection voltage;
Described current detector is coupled to described rectifier, is used to detect described galvanic electric current and exports the relevant detection electric current;
Described DC-DC converter is coupled to described rectifier by described current detector, and being used for described galvanic voltage transitions is output voltage, and load is given in power supply;
Described analog multiplier is coupled to described voltage-level detector and described current detector, is used for described detection voltage and described detection electric current are multiplied each other, and the output detection power;
Described analog-to-digital converter is coupled to described analog multiplier, is used for described detection power is converted to digital form from analog form;
Described microcontroller is coupled to described analog-to-digital converter, is used for finding out corresponding power attenuation according to the described detection power of digital form from look-up table, and shows.
2. the electronic installation with power loss detection function as claimed in claim 1 is characterized in that, described voltage-level detector comprises: two first resistors that are connected in series; Wherein,
Described two first resistor, one ends that are connected in series are coupled to described rectifier, receiving described direct current, and other end ground connection, the common joint of described two first resistors that are connected in series is exported described detection voltage.
3. the electronic installation with power loss detection function as claimed in claim 1 is characterized in that, described voltage-level detector comprises: two capacitor connected in series; Wherein,
Described two capacitor connected in series, one end is coupled to described rectifier, receiving described direct current, and other end ground connection, the common joint of described two capacitor connected in series is exported described detection voltage.
4. the electronic installation with power loss detection function as claimed in claim 1 is characterized in that, described current detector comprises: the 3rd resistor, differential amplifier that second resistor, two that detection resistor, two is connected in series is connected in series; Wherein,
Described detection resistor has first end and second end, and described first end is coupled to described rectifier, and to receive described direct current, described second end is coupled to described DC-DC converter;
Described two second resistor, one ends that are connected in series are coupled to first end of described detection resistor, and other end ground connection;
Described two the 3rd resistor one ends that are connected in series are coupled to second end of described detection resistor, and other end ground connection;
Described differential amplifier, the magnitude of voltage that is used for the 3rd resistor common joint output that the magnitude of voltage and described two with the described two second resistor common joints outputs that are connected in series is connected in series is poor, and with the voltage difference amplification that obtains, to export described detection electric current.
5. the electronic installation with power loss detection function as claimed in claim 1 is characterized in that, described current detector comprises: current transformer or hall current detector.
6. electronic installation with power loss detection function, it is characterized in that described electronic installation comprises: rectifier, voltage-level detector, current detector, DC-DC converter, first analog-to-digital converter, second analog-to-digital converter, digital multiplier, microcontroller; Wherein,
Described rectifier is used for received AC power is converted to direct current;
Described voltage-level detector is coupled to described rectifier, is used to detect described galvanic voltage, and output relevant detection voltage;
Described current detector is coupled to described rectifier, is used to detect described galvanic electric current, and output relevant detection electric current;
Described DC-DC converter is coupled to described rectifier by described current detector, and being used for described galvanic voltage transitions is output voltage, and load is given in power supply;
Described first analog-to-digital converter is coupled to described voltage-level detector, is used for described detection voltage is converted to digital form from analog form;
Described second analog-to-digital converter is coupled to described current detector, is used for described detection electric current is converted to digital form from analog form;
Described digital multiplier is coupled to described first analog-to-digital converter and described second analog-to-digital converter, is used for the described detection voltage of digital form and the described detection electric current of digital form are multiplied each other, and the output detection power;
Described microcontroller is coupled to described digital multiplier, is used for finding out corresponding power attenuation according to described detection power from look-up table, and shows.
7. the electronic installation with power loss detection function as claimed in claim 6 is characterized in that, described voltage-level detector comprises: two first resistors that are connected in series; Wherein,
Described two first resistor, one ends that are connected in series are coupled to described rectifier receiving described direct current, and other end ground connection, and the described two first resistor common joints that are connected in series are exported described detection voltage.
8. the electronic installation with power loss detection function as claimed in claim 6 is characterized in that, described voltage-level detector comprises: two capacitor connected in series; Wherein,
Described two capacitor connected in series, one end is coupled to described rectifier receiving described direct current, and other end ground connection, and described two capacitor connected in series common joints are exported described detection voltage.
9. the electronic installation with power loss detection function as claimed in claim 6 is characterized in that, described current detector comprises: the 3rd resistor, differential amplifier that second resistor, two that detection resistor, two is connected in series is connected in series; Wherein,
Described detection resistor has first end and second end, and described first end is coupled to described rectifier to receive described direct current, and described second end is coupled to described DC-DC converter;
Described two second resistors that are connected in series, described two second resistor, one ends that are connected in series are coupled to described detection resistor first end, and other end ground connection;
Described two the 3rd resistors that are connected in series, described two the 3rd resistor one ends that are connected in series are coupled to described detection resistor second end, and other end ground connection;
Described differential amplifier, the magnitude of voltage that is used for the 3rd resistor common joint output that the magnitude of voltage and described two with the described two second resistor common joints outputs that are connected in series is connected in series is poor, and with the voltage difference amplification that obtains, to export described detection electric current.
10. the electronic installation with power loss detection function as claimed in claim 6 is characterized in that, described current detector comprises: current transformer or hall current detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910146734A CN101930026B (en) | 2009-06-22 | 2009-06-22 | Electronic device with power loss detection function |
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| CN200910146734A CN101930026B (en) | 2009-06-22 | 2009-06-22 | Electronic device with power loss detection function |
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| CN101930026A true CN101930026A (en) | 2010-12-29 |
| CN101930026B CN101930026B (en) | 2012-10-17 |
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| CN200910146734A Expired - Fee Related CN101930026B (en) | 2009-06-22 | 2009-06-22 | Electronic device with power loss detection function |
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| Country | Link |
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| CN (1) | CN101930026B (en) |
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| CN102809684A (en) * | 2011-04-08 | 2012-12-05 | 康舒科技股份有限公司 | Power detection method and circuit for primary side circuit of power supply unit |
| CN103575974A (en) * | 2012-07-13 | 2014-02-12 | 株式会社理光 | Power detecting apparatus |
| CN104155514A (en) * | 2014-08-01 | 2014-11-19 | 周玉梅 | Power tester used for computer equipment |
| CN104199758A (en) * | 2014-09-16 | 2014-12-10 | 浪潮电子信息产业股份有限公司 | Design method convenient for mainboard VR Debug tests |
| CN104793048A (en) * | 2015-04-14 | 2015-07-22 | 清华大学 | Matcher loss power calculating method and device |
| CN106645927A (en) * | 2017-01-23 | 2017-05-10 | 上海理工大学 | Power detection circuit for switching power supply |
| CN107222101A (en) * | 2017-05-16 | 2017-09-29 | 西安交通大学 | A kind of integrated converter circuit for light energy collection |
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| CN109709388A (en) * | 2019-02-28 | 2019-05-03 | 苏州浪潮智能科技有限公司 | A kind of input power circuit for detecting |
| CN109870607A (en) * | 2019-02-28 | 2019-06-11 | 苏州浪潮智能科技有限公司 | A kind of output power supervisory circuit of load transducer, method and device |
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| JP4663377B2 (en) * | 2005-03-31 | 2011-04-06 | 東光東芝メーターシステムズ株式会社 | Electronic energy meter |
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| CN102809684B (en) * | 2011-04-08 | 2015-02-18 | 康舒科技股份有限公司 | Power detection method and circuit for primary side circuit of power supply unit |
| CN102809684A (en) * | 2011-04-08 | 2012-12-05 | 康舒科技股份有限公司 | Power detection method and circuit for primary side circuit of power supply unit |
| CN103575974A (en) * | 2012-07-13 | 2014-02-12 | 株式会社理光 | Power detecting apparatus |
| CN104155514A (en) * | 2014-08-01 | 2014-11-19 | 周玉梅 | Power tester used for computer equipment |
| CN104199758A (en) * | 2014-09-16 | 2014-12-10 | 浪潮电子信息产业股份有限公司 | Design method convenient for mainboard VR Debug tests |
| CN104199758B (en) * | 2014-09-16 | 2016-06-29 | 浪潮电子信息产业股份有限公司 | A kind of method for designing being easy to mainboard VR Debug test |
| CN104793048B (en) * | 2015-04-14 | 2018-01-16 | 清华大学 | The computational methods and device of adaptation loss power |
| CN104793048A (en) * | 2015-04-14 | 2015-07-22 | 清华大学 | Matcher loss power calculating method and device |
| CN106645927A (en) * | 2017-01-23 | 2017-05-10 | 上海理工大学 | Power detection circuit for switching power supply |
| CN107222101A (en) * | 2017-05-16 | 2017-09-29 | 西安交通大学 | A kind of integrated converter circuit for light energy collection |
| CN107222101B (en) * | 2017-05-16 | 2019-09-10 | 西安交通大学 | A kind of integrated converter circuit for light energy collection |
| CN109061524A (en) * | 2018-09-25 | 2018-12-21 | 湖南国科微电子股份有限公司 | Power supply test circuit and method |
| CN109709388A (en) * | 2019-02-28 | 2019-05-03 | 苏州浪潮智能科技有限公司 | A kind of input power circuit for detecting |
| CN109870607A (en) * | 2019-02-28 | 2019-06-11 | 苏州浪潮智能科技有限公司 | A kind of output power supervisory circuit of load transducer, method and device |
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| CN112257371B (en) * | 2020-10-29 | 2022-07-22 | 国网河北省电力有限公司 | Power grid transmission line analysis system |
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