CN101029905A - Automatic hook-type electricity meter - Google Patents
Automatic hook-type electricity meter Download PDFInfo
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- CN101029905A CN101029905A CN 200610058303 CN200610058303A CN101029905A CN 101029905 A CN101029905 A CN 101029905A CN 200610058303 CN200610058303 CN 200610058303 CN 200610058303 A CN200610058303 A CN 200610058303A CN 101029905 A CN101029905 A CN 101029905A
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Abstract
An electricity meter of fully-automatic hook type is prepared as setting a display and an operation key on measurement master body, enabling to insert test probe on said master body, setting a current clamp on top end of said master body for using said clamp to hold a current-carrier body, arranging automatic judgment - switchover mode on said meter and enabling said meter to measure both AC and DC current modes.
Description
Technical field
The present invention relates to a kind of automatic hook-type electricity meter, relate in particular to a kind of can arbitrarily colluding and be hung on any online automatic hook-type electricity meter.Can do except measurement patterns such as AC and DC voltage, resistance or diode, have more the AC and DC current-mode and measure.
Background technology
Existing ammeter can generally be divided into two kinds of electronics LCD liquid crystal display and mechanical scales, general common type its to remove on the body the obvious differential of scale unusual, all be equipped with the operation knob that multibank capability switches, and the function that the next door is provided with indicates, can be for the user with want test item, select correlative measurement electrical property and symbol in the gear of magnitude range to be measured and manually allot voluntarily to switch, but such measurement mode, in fact still need to measure have suitable judgement on the electricity can be for it, if beginner or be unfamiliar with operation and then can cause institute's value numerical fault because of gear is selected inaccurate, select dislocation that the table body is damaged even seriously be used in high voltage or high electric current, and injure operator's inherently safe.
Though there is the appearance of automatic type ammeter the market, can solve the above-mentioned shortcoming of being unfamiliar with the survey electricity of transferring the files, but its basic function is also only had AC voltage, dc voltage or a resistance measurement and is measured the auto-measuring pattern for three kinds, can't make the auto-measuring of hook-type AC and DC electric current and use, cause available measuring range greatly limited.
Summary of the invention
Fundamental purpose of the present invention provide a kind of can arbitrarily collude be hung on any online, have full-automatic detecting and switch selection, can do except measurement patterns such as AC and DC voltage, resistance or diode, have more the automatic hook-type electricity meter that the AC and DC current-mode is measured.
Secondary objective of the present invention provides a kind of safety and precisely is suitable for measurement priority and the survey electrical property judgment model that aforementioned automatic hook-type electricity meter uses again, the user needs only the electric power starting with ammeter, does not remake other operation and just can obtain accurate electric weight value of reading from display.
Another object of the present invention, provide a kind of single key stroke and can have the instantaneous pattern that fixes, fix instantaneous pattern and measure the maximum/minimum logging mode automatically simultaneously, can be easy to the automatic hook-type electricity meter of interpretation to be convenient for measuring electric weight numerical value, and button and comprise the make zero action of cancellation etc. of pattern and automatic shutdown mode of DC current remanent magnetism.
Another object of the present invention provides a kind of instantaneous pattern that can fix automatically when measuring current gear, be presented on the display to make things convenient for the user need not press when measuring electric current to control key stable electric current value of reading can be fixed.
Another object of the present invention provides a kind of automatic display backlight mode that comes the light on and off display backlight automatically with ambient brightness, also can easily see the value of reading on the display to make things convenient for the user under the not good environment of brightness.
Another object of the present invention, provide a security warning pattern, provide the user when use fixes instantaneous pattern and measurement maximum/minimum logging mode, measure one again and have dangerous voltage or electric current, and the signal that shows on signal that this is dangerous and the display is not for not simultaneously, can send caution automatically, warning user so operational motion has danger, and it is safer that operation is gone up.
In order to achieve the above object, a kind of automatic hook-type electricity meter that the present invention is set comprises that one measures main body, which is provided with a display and a single key of controlling, on the main body for plugging test probe, and main body upper end and be provided with electric current folder and supply to take in a carrying object; Automatic hook-type electricity meter comprises that in addition one judges a switch mode and a preferential detecting pattern automatically, when start, judge selected at external input condition by measuring main body, and have six kinds of measurements such as a direct current voltage mode, an alternating voltage pattern, a resistance mode, a diode mode, a direct current current-mode and an alternating current pattern, and under automatic switchover mode, input signal with test probe serves as preferential, and the input signal that presss from both sides with electric current is less important.
By this, but ammeter single key operating automated intelligent is switched, save the action and the time of operation ammeter, ammeter is colluded in office where line improves its facility and efficient to make things convenient for the observed quantity measured value, and it is wrong to avoid the user to transfer from line operate, and the table body that causes damage jeopardizes inherently safe, can significantly improve the industrial safety person that high-amperage survey to be used again, and provide measure the maximum/minimum logging mode, make zero pattern and the automatic display backlight mode of instantaneous pattern, DC current remanent magnetism that fix increases the convenience that ammeter uses automatically.
For ease of to the present invention more deep understanding being arranged, mat one embodiment is specified in the back now:
Description of drawings
Fig. 1 is the stereo appearance figure of automatic hook-type electricity meter embodiment of the present invention;
Fig. 2 is for judging the arrange in pairs or groups process flow diagram of preferential detecting pattern of switch mode in the embodiment of the invention automatically;
Fig. 3 is the single control flow chart of controlling key of the embodiment of the invention;
Process flow diagram when Fig. 4 measures for the embodiment of the invention;
Fig. 5 is the internal circuit diagram of the embodiment of the invention.
The drawing reference numeral explanation: 1-measures main body; The 11-display; The single key of controlling of 12-; The 13-test probe; 14-electric current folder; The 15-carrying object; The 16-hummer; 2-judges switch mode automatically; The preferential detecting pattern of 3-; The 80-fixed voltage circuit; The 81-backlight circuit; 82-DC filtering circuit; The 90-attenuator circuit; The 91-holding circuit; The 92-constant-current circuit; The 93-commutation circuit; The 94-current sensing circuit; 95-instrument and display controller; 96-resistance circuit for detecting; 97-AC rectification filtering circuit; The 98-analog/digital converter.
Embodiment
See also Fig. 1～Fig. 5, graphic content is an embodiment of automatic hook-type electricity meter of the present invention, and it comprises that mainly one measures main body 1, and judges that automatically a switch mode 2 and a preferential detecting pattern 3 form.
This measurement main body 1 is provided with a display 11 and a single key 12 of controlling, and measures to supply to plug test probe 13 on the main body 1, and measures main body 1 upper end and be provided with electric current folder 14 for taking in a carrying object 15.
Automatically judgement switch mode 2 is judged selected by measuring main body 1 at external input condition when start, and has the measurement of AC and DC electric current, DC voltage pattern, alternating voltage pattern, resistance mode and diode mode, and this preferential detecting pattern 3 is in automatic judgement switch mode 2 times, preferential with being input as of test probe 13, and electric current presss from both sides for 14 be input as less important (as shown in Figure 2).
By this, make measurement main body 1 control the function that reaches the automated intelligent switching with the single key 12 of controlling, save the action and the time of operation ammeter, ammeter is hooked in any online with electric current folder 14 to make things convenient for the observed quantity measured value to improve its facility and efficient, and it is wrong to avoid the user to transfer from line operate, and the table body that causes damage jeopardizes inherently safe, can significantly improve high-amperage again and survey the industrial safety person who uses.
During the invention process, it measures in main body 1 and can establish a hummer 16 and makes in good time and provide sound sound at the survey state response, measure and the bottom can be done to such an extent that be easy to hand when main body 1 is made than the narrow avometer that makes in top, the preferred configuration of each size allows the avometer can hand-held with a hand, make the single key 12 of controlling can be with taking the arbitrary hand hold avometer to be started, and singlely control key 12 and make the double as instantaneous pattern that fixes, cancel the action of the instantaneous pattern that fixes automatically, measure the maximum/minimum logging mode, the make zero control of opening of pattern etc. of DC current remanent magnetism, and the automatic shutdown mode of cancellation, promptly this single key 12 of controlling is to be used for starting avometer under off-mode, if press single control key 12 and relieving at once during shutdown, then can start automatic shutdown mode and start, its single key 12 of controlling of start back can be with the execution instantaneous pattern that fixes, make zero pattern and close triple functions of ammeter of DC current remanent magnetism, when fixing instantaneous pattern, execution can be used to measurement is remained on the display, when returning pattern, DC current remanent magnetism electric current can be pressed from both sides the 14 magnetic after effects eliminations that when measuring DC current, produced when carrying out, clicking single controlling when key 12 surpasses 3 seconds under open state then is shutdown, when surpassing 1 second for carrying out the DC current remanent magnetism pattern that makes zero, less than 1 second was to carry out the instantaneous pattern that fixes, again by once then cancelling the instantaneous pattern that fixes.
In starting under the automatic shutdown mode state, become the instantaneous pattern that fixes if after starting the instantaneous pattern that fixes automatically, press single 12 on the key controlled by the instantaneous mode switch that fixes automatically when measuring electric current, and the shown measurement on the picture is constant, for carrying out the DC current remanent magnetism pattern that makes zero, then be shutdown when surpassing 3 seconds when surpassing 1 second.Again by once then cancelling the instantaneous pattern that fixes.
Continue to press and surpass 2 seconds and then cancel automatic shutdown mode and start if the single key 12 of controlling the time is pressed in shutdown, single afterwards 12 on the key controlled is with measuring the maximum/minimum logging mode, DC current makes zero and closes triple functions of ammeter, when in measuring alternating voltage, DC voltage, when alternating current or DC current pattern, press and control key 12 and can carry out and measure the maximum/minimum logging mode, this pattern can be used to make ammeter to be fixed on alternating voltage, DC voltage, in alternating current or the DC current pattern, and record from start to measure measurement behind the maximum/minimum logging mode to maximal value and minimum value, the result of changeable record result or real-time measurement is presented on the display, under open state, click and then be shutdown when surpassing 3 seconds, for carrying out the DC current remanent magnetism pattern that makes zero, measured the maximum/minimum logging mode for carrying out when surpassing 1 second less than 1 second.
Measure in the maximum/minimum logging mode in carrying out, whenever pressing single 12 on the key of controlling can show that switching in regular turn shows between real-time measurement value, maximum measured value and the minimum measured value.For carrying out the DC current remanent magnetism pattern that makes zero, then be shutdown when surpassing 3 seconds when surpassing 1 second.
Wherein, this measurement main body 1 fixes and will ring when instantaneous pattern starts and display 11 demonstrations " HOLD " symbol, this moment, picture was constant, rang one again when the instantaneous pattern that fixes is closed.
When start, start under the state of automatic shutdown mode, when measuring electric current, measuring one more than or equal to a certain setting current value, it is instantaneous to be referred to as to fix automatically, can start automatically during the steady current of minimum current measuring value (for example 3A), to ring continuously three during startup and display 11 demonstrations " AUTO "; " HOLD " two symbols; this moment, picture was constant but continue to monitor the signal of test probe 13 and electric current folder 14; the instantaneous pattern that fixes automatically of pushing button can switch to the instantaneous pattern and ringing of fixing; this moment, picture was still constant; after the instantaneous pattern that fixes automatically starts; differ above 0.2A more than or equal to the steady current of the instantaneous minimum current measuring value (for example 3A) that fixes automatically and the value on this current value and the display 11 if measure one again, just restart the instantaneous pattern that fixes automatically, to keep showing new measurement; Automatically after the instantaneous pattern of fixing started, if electric current folder 14 electric currents that measure are less than fixing transient state minimum current measuring value (for example 3A) or during for astable electric current automatically, the instantaneous pattern that fixes automatically can cancellation automatically after 5 seconds; Automatically whether fix after the instantaneous pattern startup, still can measure exploration pin 13 has signal, then leaves the instantaneous mode switch that fixes automatically immediately to suitably pattern measurement and demonstration if having.
Under the automatic shutdown mode state of cancellation, and when measuring AC and DC voltage or AC and DC electric current, measure the maximum/minimum logging mode if push button less than then starting in 1 second, can ring during startup and display 11 demonstrations " RECORD " symbol, afterwards scale can continue to write down from enter measure measurement behind the maximum/minimum logging mode to maximal value and minimum value, show present measuring value on the display 11 simultaneously; Click single control can show behind the key 12 institute's maximal value that write down and " MAX " symbol sound one also, click again can show the minimum value write down and " MIN " symbol and ringing, click again can show present measurement and " RECORD " symbol and ringing, so circulation is switched; If press when surpassing 1 second to carrying out the DC current remanent magnetism pattern that makes zero, electric current can be pressed from both sides 14 magnetic after effects that produced when measuring DC current eliminates, show during execution " DC ", " 0.0 ", " A ", " ZERO " and etc. symbol 2 seconds carry out this action with expression, and leave measurement maximum/minimum logging mode, then be shutdown when surpassing 3 seconds.
And still do not have when operation as the user after operating 20 minutes from last time, and when shutdown mode had started automatically, then ammeter can shut down voluntarily.
The present invention can measure six kinds of patterns: a direct current voltage mode, one alternating voltage pattern, one direct current current-mode, one alternating current pattern, one diode mode, and the automatic judgement switch mode 2 of a resistance mode, automatically judge switching by ammeter itself, in this avometer when automatically judging switch mode 2, preferential detecting pattern 3 can be based on the input signal of test probe 13, input signal with electric current folder 14 is a pair, that is to say in the DC voltage pattern, the alternating voltage pattern, when resistance mode or diode mode test probe 13 can measure signal, it is display voltage, the relative value of resistance or diode, when no signal, just show 14 current values that measure of electric current folder, if when electric current folder 14 also measures less than electric current, just show the state of resistance file overflow.
Can allow the user when measuring voltage, resistance or diode according to above-mentioned characteristic, ammeter can be hooked in any one online to make things convenient for the observed quantity measured value, whether no matter this bar is online has electric current to pass through, all can correctly show the voltage of surveying or resistance value, and input signal can press from both sides 14 measurement electric currents by electric current as long as open a way test probe 13 not when measuring electric current, therefore using this avometer can provide facility and the security bigger in the use than known ammeter, has not been required to be to measure different signals and manually exchange of notes part measurement.
The present invention design be taken in single control key 12 and be activated after, promptly be preset as voltage mode, if there is the voltage input at test probe 13 two ends, judge that then whether alternating voltage is greater than 0.9V, whether DC voltage is greater than 2.0V or not smaller or equal to-0.5V, if judge that again what person of flip-flop and alternating component is big, on display 11, show conform to composition big interchange or DC voltage pattern, if not whether the testing resistance that then switches to resistance mode and judge test probe 13 two ends is less than 10000 nurses difficult to understand, if less than then showing the resistance value that is measured, greater than then switching to diode mode and judging whether the diode voltage to be measured at test probe 13 two ends reaches less than 1.0V greater than 0.2V, if then show the diode voltage value that is measured, then switch to current-mode if not and judge that electric current presss from both sides 14 two ends no current is arranged, if there is electric current to judge that then whether alternating current C is greater than 0.5A, whether DC current is greater than 0.5A or not less than-0.5A, if judge that again what person of flip-flop and alternating component is big, on display 11, show conform to composition big interchange or DC current pattern, if not then show the state of resistance file overflow.
Manner of execution after entering initial actuating setting elder generation's detection amount of batteries when the present invention starts shooting and showing battery electric quantity number percent, is measured dc voltage earlier as shown in Figure 4 more specifically, measures AC voltage afterwards, carries out following a series of judgement again and moves:
A. if the measurement dc voltage during also greater than 999.9V, then shows combined-voltage overflow OL signal greater than 999.9V and AC voltage, if the non-DC voltage overflow OL signal that then only shows during greater than 999.9V of of ac measured value.
B. suppose the dc voltage measurement between 2.1～999.9V or between-0.5V～-999.9V then carries out AC voltage and judges, if then show alternating voltage overflow OL signal greater than 999.9V, if not above situation is when its AC voltage during greater than the dc voltage that takes absolute value, then show measured for AC voltage and show its numerical value, otherwise then show measured for dc voltage and show its numerical value.
C. if the dc voltage that measured is lower than 2.1V greater than-0.5V, AC voltage is when 1.0V～999.9V, show alternating voltage, if AC voltage is greater than 999.9VAC voltage, then show alternating voltage overflow OL signal, if AC voltage is also non-during greater than 0.9V, again in the absolute value of the measurement of dc voltage if when being less than or equal to 1.1V, then automatically switch into the measurement resistance mode, if then automatically switch into the measurement diode mode during greater than 0.2V.
D. inlet measuring resistance pattern, judge its resistance if during less than 10000 nurses difficult to understand, the resistance value that then shows its measurement, and continue to measure resistance, and after twice resistance of every measurement, measure one time alternating voltage, if the measurement of alternating voltage is more than or equal to 1.0V, then show alternating voltage, otherwise then continue to measure resistance, if then skip to the measurement diode mode greater than 9999 nurses difficult to understand.
E. enter the measurement diode mode, judge that diode both end voltage value between 0.3～0.9V, then shows the voltage value of its measurement, if in scope, then do not skip to the measurement current-mode.
F. enter the measurement current-mode, measure the DC electric current, measure the AC electric current afterwards, if measurement DC electric current is greater than 999.9A and AC electric current during also greater than 999.9A, then show ac and dc current overflow OL signal, if the non-DC current overflow OL signal that then only shows during greater than 999.9A of of ac measured value.
G. the absolute value of supposing DC current measurement result then carries out the judgement of AC electric current between 0.6～999.9A, if greater than 999.9A display AC electric overflow OL signal then, if not above situation is when its AC electric current during greater than the direct current DC electric current that takes absolute value, then show measured for the AC electric current and show its numerical value, otherwise then show measured for the DC electric current and show its numerical value.
H. if the DC electric current that measured is lower than 0.6A greater than-0.6A, the AC electric current then shows the AC electric current between 0.6A～999.9A, if the AC electric current then shows AC electric current overflow OL signal greater than 999.9A, if the AC electric current is also non-during greater than 0.6A, then show Ω " OL " state of resistance file overflow.
The present invention designs in order to meet preferential detecting pattern 3, so still can remove to measure exploration pin 13 under DC current and alternating current pattern whether signal is arranged, and then switches to suitable pattern measurement and demonstration if having.
Please join shown in the 1st, 5 figure; it is Circuits System framework of the present invention; wherein, more comprise the key 12 that except that aforementioned display 11, hummer 16 and single controlling one switches circuit 93, a current sensing circuit 94, an instrument and display controller 95, a resistance circuit for detecting 96, two AC rectification filtering circuits 97, an analog/digital converter 98, certain voltage circuit 80, two DC filtering circuit 82 and backlight circuits 81 with an attenuator circuit 90 of test probe 13 couplings and a holding circuit 91, a constant-current circuit 92.
This attenuator circuit 90 provides once the input voltage of regulating to aforesaid DC filtering circuit 82 and AC rectification filtering circuit 97 and exports commutation circuit 93 again to, this commutation circuit 93 is exported pairing voltage, electric current, diode or resistance signal to analog/digital converter 98 by instrument and display controller 95 controls according to the present pattern that measures.
This constant-current circuit 92 provides a measuring current to holding circuit 91 in resistance mode; make electric current through this to a test probe 13 and a coupling unknown resistance RX therebetween; follow the pressure drop on this unknown resistance RX just can be measured, and this resistance can be judged out according to following formula:
RX=pressure drop/measuring current
This resistive mode can also comprise a continuity test, wherein between this test probe 13 is considered as short circuit to the resistance less than a critical resistance value, and is indicated via hummer 16 sound equipments.
This commutation circuit 93 is that the input signal that is used for switching analog/digital converter 98 is a current sensing circuit 94 via AC rectification filtering circuit 97 and DC filtering circuit 82 resulting ACA, DCA signal or attenuator circuit 90 resistance signal via AC rectification filtering circuit 97 and DC filtering circuit 82 resulting alternating voltages, d. c. voltage signal or resistance circuit for detecting 96, and direct current signal is exported.
This current sensing circuit 94 comprises amplifier, voltage divider and an aforesaid electric current folder 14, make electric current folder 14 detection electric currents produce voltage signal coupling and deliver to AC rectification filtering circuit 97 and commutation circuit 93, become the direct current signal that is suitable for converting to the digital quantity measured value to change a voltage signal.
This instrument and display controller 95 are according to the format of this digital quantity measured value of measurement mode treatment of selecting and are converted to the form of these display 11 needs, with the light on and off of control backlight circuit 81 and the sound of control hummer 16.
This resistance circuit for detecting 96 is that the pattern of detecting the signal that is just being measured is voltage or resistance, does to be switched and determined and the demonstration resistance value so that a control commutation circuit 93 to instrument and display controller 95 to be provided.
This analog/digital converter 98 is that measuring value is converted to the digital quantity measured value, delivers to instrument and display controller 95 as showing the interpretation condition and showing it.
This fixed voltage circuit 80 is to provide a test voltage to holding circuit 91 in diode mode, provides voltage to a coupling diode therebetween through this to test probe 13, and the pressure drop on this diode just can be measured via DC filtering circuit 82.
This backlight circuit 81 is in order to detect present ambient light intensity and to receive instrument and the control signal of display controller 95 makes backlight bright or go out.
This instrument display controller 95 controls pattern that should measure again according to the essence and the big or small decision of input signal, state with control commutation circuit 93 and display 11, and receive by single and control the signal that key 12 is sent here, according to the display mode or the shutdown of the length control display 11 of signal time.
In addition, automatic hook-type electricity meter of the present invention comprises an automatic display backlight mode and a security warning pattern in addition, makes when shady place is operated can to start display backlight automatically and make things convenient for the user to see the value of reading on the display.After this automatic display backlight mode met the condition that starts display backlight in ambient brightness, delay earlier just started display backlight in two seconds, to reduce misoperation backlight.And this security warning pattern provides the user when use fixes instantaneous and measure two kinds of patterns of maximum/minimum record, measure an alternating voltage in test probe or electric current folder again, DC voltage, alternating current or DC current, and show on this signal and the display for different signal the time, can send caution automatically, warning user so operational motion has danger, if above-mentioned two signals are all alternating voltage, DC voltage, when alternating current or DC current, operate in the instantaneous pattern following time of fixing, more can do comparison on the size to two signals, if the signal that two signals are voltage and test probe during than the big 5.0A of signal that shows on the display, also can send caution greater than 5.0V or two signals signal that is electric current and electric current folder than the signal that shows on the display automatically.And after this security warning pattern started, the numerical value of its measurement can be designed to keep the signal of original locking or change into the new value of the signal that measures afterwards.
Again, the present invention measures main body can check the surplus electric weight of battery when start, be 0% with 7V, and 9V is 100%, and does percentages show according to the actual electric weight of battery, shows simultaneously then that less than 7V battery symbol is with expression electric weight deficiency.The start back was checked the one-shot battery electric weight in per 3 minutes.
Cooperate actual manufactured goods with firmware according to aforementioned hardware it can provide following function on measuring, and allowing ammeter operate can use by more humane easy operating:
The above, is only in order to disclose the enforceable aspect of the present invention, can not be in order to limit q claim scope of the present invention, all common those skilled in the art that are familiar with this area obviously can do to change and modify, and all should be considered as not departing from flesh and blood of the present invention.
According to the content that is above disclosed, the present invention really can reach the intended purposes of invention, and a kind of automatic hook-type electricity meter is provided, and has the value that industry is utilized.
Claims (22)
1. automatic hook-type electricity meter comprises that one measures main body, which is provided with a display and a single key of controlling, on the main body for plugging test probe, and main body upper end and be provided with electric current folder and supply to take in a carrying object; It is characterized in that this automatic hook-type electricity meter comprises in addition:
One automatically judges switch mode, judges selectedly at external input condition by measuring main body when start, and has the measurement of AC and DC current-mode.
2. automatic hook-type electricity meter as claimed in claim 1 is characterized in that, it further comprises a preferential detecting pattern, and is preferential with being input as of test probe under automatic judgement switch mode, and being input as of electric current folder is less important.
3. automatic hook-type electricity meter as claimed in claim 1 is characterized in that, this judges that automatically switch mode comprises the measurement of DC voltage pattern, alternating voltage pattern, resistance mode and diode mode in addition.
4. automatic hook-type electricity meter as claimed in claim 3 is characterized in that, it further comprises a preferential detecting pattern, and is preferential with being input as of test probe under automatic judgement switch mode, and being input as of electric current folder is less important.
5. automatic hook-type electricity meter as claimed in claim 4, it is characterized in that, when having the voltage input to measure signal in DC voltage pattern, alternating voltage pattern, diode mode or resistance mode test probe two ends, it is the relative value of display voltage, diode or resistance, opening a way test probe not, input signal just shows the current value that the electric current folder is measured, if when the electric current folder also measures less than electric current, then show resistance file overflow (OL) state.
6. automatic hook-type electricity meter as claimed in claim 5, it is characterized in that, this resistance mode can also wrap a continuity test, wherein between this test probe is considered as short circuit to the resistance less than a critical resistance value, and is indicated via a display and a hummer.
7. automatic hook-type electricity meter as claimed in claim 4 is characterized in that, enters initial setting during this scale start and after detecting amount of batteries, measures DC voltage earlier, measures alternating voltage afterwards, carries out following a series of judgement action again:
A: if the measurement DC voltage then shows combined-voltage overflow signal greater than 999.9V and alternating voltage during also greater than 999.9V, if the non-DC voltage overflow OL signal that then only shows during greater than 999.9V of of ac measured value;
B: suppose the direct current measurement between 2.1V～999.9V or between-0.5V～-999.9V then carries out alternating voltage and judges, if then show alternating current overflow signal greater than 999.9V, if not above situation is when its alternating voltage during greater than the DC voltage that takes absolute value, then show measured for alternating voltage and show its numerical value, if aforementionedly be judged as otherwise show being DC voltage and showing its numerical value of being measured;
C: if the DC voltage that measured is lower than 2.1V greater than-0.5V, alternating voltage is when 1.0V～999.9V, show alternating voltage, if AC voltage is greater than 999.9V voltage, then show alternating voltage overflow OL signal, if alternating voltage is also non-greater than 0.9V, again in the absolute value of the measurement of DC voltage if when being less than or equal to 1.1V, then automatically switch into the measurement resistance mode, if then automatically switch into the measurement diode mode greater than 0.2V:
D: inlet measuring resistance pattern, judge its resistance if during less than 10000 nurses difficult to understand, the resistance value that then shows its measurement, and continue to measure resistance, and after twice resistance of every measurement, measure one time alternating voltage, if the measurement of alternating voltage is more than or equal to 1.0V, then show alternating voltage, otherwise then continue to measure resistance, if then skip to the measurement diode mode greater than 9999 nurses difficult to understand;
E: enter the measurement diode mode, judge that diode both end voltage value between 0.3V～0.9V, then shows the magnitude of voltage of its measurement, if in scope, then do not skip to the measurement current-mode;
F: enter the measurement current-mode, measure DC current, measure alternating current afterwards, if the measurement DC current is greater than 999.9A and alternating current during also greater than 999.9A, then show ac and dc current overflow signal, if the non-DC current overflow signal that then only shows during greater than 999.9A of of ac measured value;
G: the absolute value of supposing DC current measurement result then carries out the alternating current judgement between 0.6A～999.9A, if greater than 999.9A display AC electric overflow signal then, when if not above situation flows greater than the direct current that takes absolute value when its alternating current, then show measured for alternating current and show its numerical value, otherwise then show measured for DC current and show its numerical value; And
H: if the DC current that measured is lower than 0.6A greater than-0.6A, alternating current then shows the AC electric current between 0.6A～999.9A, if the AC electric current then shows AC electric current overflow OL signal greater than 999.9A, if alternating current is also non-during greater than 0.6A, then show the state of resistance file overflow.
8. automatic hook-type electricity meter as claimed in claim 4, it is characterized in that, but this measurement main body single controlled the key watt-hour meter and starts and shutdown, and the start back measures maximum/minimum logging mode, a direct current electric current remanent magnetism make zero pattern, a cancellation fix automatically instantaneous pattern and the automatic shutdown mode of a cancellation to start the instantaneous pattern, that fixes; Wherein, be to be used for starting ammeter under off-mode, if shutdown the time presses and to surpass 2 seconds and then can start shooting and cancel automatic shutdown mode, less than then only doing boot action in 2 seconds; In start and have to click under the state of automatic shutdown mode and then be shutdown when surpassing 3 seconds, surpass 1 second then for doing DC current remanent magnetism flyback action, during less than 1 second for starting the instantaneous pattern that fixes, again by once then cancelling the instantaneous pattern that fixes; In start and cancel under the state of automatic shutdown mode, click and then be shutdown when surpassing 3 seconds, surpass 1 second then for doing DC current remanent magnetism flyback action, during less than 1 second for starting measurement maximum/minimum logging mode; Under open state, if the instantaneous pattern that fixes starts automatically, then click and can switch the instantaneous pattern that fixes automatically and enter the instantaneous pattern that fixes, press and then be shutdown when surpassing 3 seconds, surpass 1 second then for doing DC current remanent magnetism flyback action; Under open state, if measuring the maximum/minimum logging mode starts, then click and to show the maximal value that is recorded, click again and can show the minimum value that is recorded, click and can show the signal value measure at present, click and can show the maximal value that is recorded, so circulation is switched, pressing when surpassing 3 seconds then is shutdown, surpasses 1 second then for doing DC current remanent magnetism flyback action.
9. automatic hook-type electricity meter as claimed in claim 8 is characterized in that, this measurement main body fixes and will ring when instantaneous pattern starts and the display demonstration " HOLD " symbol, this moment, picture was constant, rang one again when the instantaneous pattern that fixes is closed.
10. automatic hook-type electricity meter as claimed in claim 8, it is characterized in that, when start, start under the state of automatic shutdown mode, when measuring electric current, measuring one more than or equal to a certain setting current value, it is instantaneous to be referred to as to fix automatically, can start automatically during the steady current of minimum current measuring value (for example 3A), to ring continuously three during startup and the display demonstration " AUTO "; " HOLD " two symbols; this moment, picture was constant but continue to monitor the signal of test probe and electric current folder; the instantaneous pattern that fixes automatically of pushing button can switch to the instantaneous pattern and ringing of fixing; this moment, picture was still constant; after the instantaneous pattern that fixes automatically starts; differ above 0.2A more than or equal to fix the automatically steady current of instantaneous minimum current measuring value (for example 3A) and the value on this current value and the display if measure one again, just restart the instantaneous pattern that fixes automatically, to keep showing new measurement; Automatically after the instantaneous pattern of fixing started, if the electric current that the electric current folder measures is less than fixing instantaneous minimum current measuring value (for example 3A) or during for astable electric current automatically, the instantaneous pattern that fixes automatically can cancellation automatically after 5 seconds; Automatically whether fix after the instantaneous pattern startup, still can measure the exploration pin has signal, then leaves the instantaneous mode switch that fixes automatically immediately to suitably pattern measurement and demonstration if having.
11. automatic hook-type electricity meter as claimed in claim 8, it is characterized in that, under the automatic shutdown mode state of cancellation, and when measuring AC and DC voltage or AC and DC electric current, measure the maximum/minimum logging mode if push button less than then starting in 1 second, can ring during startup and the display demonstration " RECORD " symbol, afterwards scale can continue to write down from enter measure measurement behind the maximum/minimum logging mode to maximal value and minimum value, show present measuring value on the display simultaneously; Click control can show behind the key institute's maximal value that write down and " MAX " symbol sound one also, click again can show the minimum value write down and " MIN " symbol and ringing, click again can show present measurement and " RECORD " symbol and ringing, so circulation is switched; If press when surpassing 1 second to carrying out the DC current remanent magnetism pattern that makes zero, and leave and measure the maximum/minimum logging mode, then be shutdown when surpassing 3 seconds.
12. automatic hook-type electricity meter as claimed in claim 8, it further includes an automatic display backlight mode, can automatically start display backlight and make things convenient for the user to see the value of reading on the display when shady place is operated; After this automatic display backlight mode met the condition that starts display backlight in ambient brightness, delay earlier just started display backlight in 2 seconds, to reduce misoperation backlight.
13. automatic hook-type electricity meter as claimed in claim 8, it further comprises a security warning pattern, provide the user when use fixes instantaneous and measure two kinds of patterns of maximum/minimum record, measure an alternating voltage in test probe or electric current folder again, DC voltage, alternating current or DC current, and show on this signal and the display for different signal the time, can send caution automatically, warning user so operational motion has danger, if above-mentioned two signals are all alternating voltage, DC voltage, when alternating current or DC current, operate in the instantaneous pattern following time of fixing, more can do comparison on the size to two signals, if the signal that two signals are voltage and test probe during than the big 5.0A of signal that shows on the display, also can send caution greater than 5.0V or two signals signal that is electric current and electric current folder than the signal that shows on the display automatically.
14. automatic hook-type electricity meter as claimed in claim 13 is characterized in that, after this security warning pattern starts, the numerical value system of its measurement will change into the new value of the signal that measures afterwards.
15. automatic hook-type electricity meter as claimed in claim 8 is characterized in that, this automatic shutdown mode can be when still not having operation after operating 20 minutes from last time as the user, shutdown voluntarily.
16. automatic hook-type electricity meter as claimed in claim 8, it is characterized in that, when this measurement main body is pressed and is controlled key and surpass 1 second for carrying out the DC current remanent magnetism pattern that makes zero, electric current can be sandwiched in the magnetic after effect that is produced when measuring DC current and eliminate, show during execution " DC ", " 0.0 ", " A ", " ZERO " wait symbol 2 seconds with this action of expression execution.
17. automatic hook-type electricity meter as claimed in claim 4, its inner built-up circuit comprises:
One with an attenuator circuit and the Yi Bao Zhi circuit of test probe coupling;
One constant-current circuit provides a measuring current to holding circuit in resistance mode;
The certain voltage circuit provides a test voltage to holding circuit in diode mode;
One switches circuit, being used for the source of switched input signal is current sensing circuit via an AC rectification filtering circuit and the resulting alternating current of a direct current filtering circuit, dc current signal, the attenuator circuit signal via AC rectification filtering circuit and the resulting alternating voltage of DC filtering circuit, d. c. voltage signal or resistance circuit for detecting, and direct current signal is exported;
One instrument and display controller be the form of these display needs according to the format conversion of this digital quantity measured value of measurement mode treatment of selecting, with the light on and off of control backlight circuit with control the sound of hummer;
One resistance circuit for detecting, the pattern of the signal that detecting is just being measured is voltage or resistance, does to switch interpretation and shows resistance value so that a control commutation circuit to instrument and display controller to be provided;
One current sensing circuit, comprise amplifier, voltage divider and an aforesaid electric current folder, the electric current folder detects electric current and produces an AC signal and a direct current signal, the AC rectification filtering circuit is delivered in the AC signal coupling, become the direct current signal that is suitable for converting to the digital quantity measured value to change an AC signal, the DC filtering circuit is delivered in the direct current signal coupling;
One analog/digital converter changes into the digital quantity measured value with measuring value, sends to instrument and display controller, as the interpretation condition that shows and show it; And
One backlight circuit is detected present ambient light intensity and is received instrument and the control signal of display controller makes backlight bright or go out.
18. automatic hook-type electricity meter as claimed in claim 17, it is characterized in that, this attenuator circuit provides once the input voltage of regulating to aforesaid commutation circuit and AC rectification filtering circuit, this commutation circuit is exported pairing voltage, electric current, diode or resistance signal to analog/digital converter by instrument and display controller control according to the present pattern that measures.
19. automatic hook-type electricity meter as claimed in claim 17, it is characterized in that, this instrument and display controller are with the essence of input signal and the pattern of size decision measurement, state with control commutation circuit and display, and receive by single and control the signal that key is sent here, change the state of display according to the length of signal time.
20. automatic hook-type electricity meter as claimed in claim 17 is characterized in that, when this backlight circuit is understood feed signals to instrument and display controller when ammeter when shady place is operated, can start display backlight.
21. automatic hook-type electricity meter as claimed in claim 1 is characterized in that, this measurement main body can be checked the surplus electric weight of battery when start, with 7V is 0%, 9V is 100%, and does percentages show according to the actual electric weight of battery, shows simultaneously then that less than 7V battery symbol is with expression electric weight deficiency.The start back was checked the one-shot battery electric weight in per 3 minutes.
22. automatic hook-type electricity meter as claimed in claim 1 is characterized in that, this measurement main body is the body that encrusts, and its bottom is narrower than top bottom, makes to be easy to hand, and establishing in it has a hummer in addition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100583034A CN100492024C (en) | 2006-03-01 | 2006-03-01 | Automatic hook-type electricity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100583034A CN100492024C (en) | 2006-03-01 | 2006-03-01 | Automatic hook-type electricity meter |
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| Publication Number | Publication Date |
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| CN101029905A true CN101029905A (en) | 2007-09-05 |
| CN100492024C CN100492024C (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100583034A Expired - Fee Related CN100492024C (en) | 2006-03-01 | 2006-03-01 | Automatic hook-type electricity meter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923821A (en) * | 2010-09-28 | 2010-12-22 | 天津三星电子显示器有限公司 | Method for detecting backlight currents of liquid crystal display through analog-to-digital conversion inside chip |
| CN102095906A (en) * | 2009-12-11 | 2011-06-15 | 瑞星科技股份有限公司 | Separated ammeter |
| CN102262168A (en) * | 2010-05-28 | 2011-11-30 | 瑞星科技股份有限公司 | Full-automatic electricity meter |
| CN101650380B (en) * | 2008-08-15 | 2012-11-28 | 承永资讯科技股份有限公司 | Intelligent measuring device automatically selecting measuring functions |
| CN110456126A (en) * | 2019-08-23 | 2019-11-15 | 深圳成智达科技有限公司 | A kind of signal intelligent identification module |
| CN111198349A (en) * | 2018-11-16 | 2020-05-26 | 瑞星科技股份有限公司 | Ammeter test rod and ammeter combination using same |
-
2006
- 2006-03-01 CN CNB2006100583034A patent/CN100492024C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650380B (en) * | 2008-08-15 | 2012-11-28 | 承永资讯科技股份有限公司 | Intelligent measuring device automatically selecting measuring functions |
| CN102095906A (en) * | 2009-12-11 | 2011-06-15 | 瑞星科技股份有限公司 | Separated ammeter |
| CN102262168A (en) * | 2010-05-28 | 2011-11-30 | 瑞星科技股份有限公司 | Full-automatic electricity meter |
| CN101923821A (en) * | 2010-09-28 | 2010-12-22 | 天津三星电子显示器有限公司 | Method for detecting backlight currents of liquid crystal display through analog-to-digital conversion inside chip |
| CN111198349A (en) * | 2018-11-16 | 2020-05-26 | 瑞星科技股份有限公司 | Ammeter test rod and ammeter combination using same |
| CN110456126A (en) * | 2019-08-23 | 2019-11-15 | 深圳成智达科技有限公司 | A kind of signal intelligent identification module |
| CN110456126B (en) * | 2019-08-23 | 2020-05-19 | 深圳成智达科技有限公司 | Signal intelligent recognition module |
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| Publication number | Publication date |
|---|---|
| CN100492024C (en) | 2009-05-27 |
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