TW577991B - Totally automatic hook-type electric meter and its measuring method - Google Patents

Abstract

A totally automatic hook-type electric meter and its measuring method with totally automatic detection to select current measurement, voltage measurement or resistance measurement are disclosed in the present invention. For the user, it is only necessary to turn on the power of the electric meter such that the accurate reading-value of electricity can be obtained from the display screen without operating the other device. The invented electric meter is different from the clamping type electric meter where different function selection for measuring current, voltage or resistance value is selected manually. Thus, the risk of safety for user itself and damage of meter body itself caused by the measurement of electric values conducted by the user can be prevented so as to greatly raise industrial safety in application of large current measurement for industrial field. In addition, both action and time for operating electric meter can be saved so as to increase its convenience and efficiency.

Description

57 \ V. Description of the invention (1) [Invention field] The user of the present invention can obtain accurate current measurement voltage by turning off the screen. [Background of the invention] Press, there are two types of existing scales, and one is equipped with multi-segments for use. Select the relevant power measurement method. In fact, if the value of the beginner value is wrong, the body is damaged, and the market is in danger, although it is like the US patent case KE company model 7-3 0 0 / 7-6 0 0). Disadvantages of measuring electricity, but there are three types of automatic measurement of large AC current, DC voltage or resistance measurement. In view of the above-mentioned shortcomings in the application of the conventional single-button electric meter, the inventor of the present invention is intensively developing and improving. [Summary of the invention] Regarding the innovation on the single-button electric meter, especially convenient for measuring the power of the hook-on meter, the value can be read from the displayed power without any other operation. It has full automatic detection and selects for measurement. Or automatic hook meter for resistance measurement. The electric meters can be roughly divided into electronic LCD liquid crystal display and mechanically common models. In addition to the amount of body indicating the difference in display, the operation switch of the function switch, and the functions provided next to it can be tested according to the desired items, and Manually assign the switch between the nature of the gear and the range of the size to be measured, but such a practice still needs to have considerable judgement on the amount of electricity to be used or unfamiliar with the operation. It will be caused by the inaccurate selection of the gear. Even severely used in high voltage or high current misplacement will make the watch and the operator's own safety. 5 1 42 2 2 No. 1 and 543 2 70 No. 6 (the emergence of FLU electric meters can solve the above basic functions are also only A C voltage automatic measurement mode, can not be hooked, resulting in a large range of available measurement

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V. Description of the invention (2) The main object of the present invention is to provide a fully automatic hook-type electric switch which can be used with four modes of full-automatic detection and switching, and can be used for alternating, current or resistance measurement. The secondary purpose is to provide a safety: the measurement priority order of the moving hook meter and the tester as long as the user turns on the power of the meter, no longer obscure to get accurate power readings. Another object of the present invention is to provide a single-button f) lattice transient HOLD mode to facilitate the measurement of electricity numbers. No. In order to achieve the foregoing object, the full-automatic measuring method provided by the present invention mainly includes: a meter body, a single control key on the body, a main body in place for a plug to set a test probe, and a current clamp for storing a current-carrying device. Conductor; an automatic judging and cutting Selection Function, which is judged and selected by the main situation of the meter at startup, and has four priority detection mechanisms such as a DC voltage mode i mode, a resistance mode and an AC current mode. Under the automatic switching mode, Take test as priority ', take the input signal of current clamp as secondary. When the meter is turned on, it enters the initial setting to detect the electric DC voltage. After 3 measurements, the AC voltage is averaged after 2 measurements. After the same measurement 3 times, the 2 subsequent averages are performed and the following series of judgment actions are performed: a 、 Right test results: DC DC voltage is greater than looov (Volvo Hook DC meter. Precise and electrical properties. Other operations are performed. The reading of the hook-type electricity is provided with an upper-end switching mechanism, and a measurement probe. Value C recorded its special) and especially any line voltage, AC suitable for the aforementioned judgment mechanism can be equipped with a fully automatic meter and its volume display, and is equipped with an Auto external input AC voltage; and an input signal, Measure first and then measure the average value. When the current of the AC current is 57 k 27, the TUT voltage is greater than 1 0 0 0 V, the AC and DC voltage overflow 0LV signal will be displayed. If the AC S measurement value is not When it is greater than 1 0 0 0 V, only the DC voltage overflow 0 L signal will be displayed. B. Assuming that the DC measurement results are between 1 · 5 ~ 1 ο OV and less than or equal to 0 · 2 V, AC AC judgment is performed. If greater than 100% Display the OL signal of AC voltage overflow. If it is not larger, judge its AC ... If the average value of the voltage is greater than the average value of the DC DC voltage that takes the absolute value, then display the measured AC AC power and display its value. If the foregoing judgment is otherwise Display the measured DC AC current and its value; c. If the measured: DC DC voltage is lower than 1 · 5 V, and AC AC voltage is not greater than 0 · 9 V, then the amount of DC DC voltage If the absolute value of the measurement result is less than or special to 0 · 3 V ', it will automatically switch to the measurement resistance mode; if it is greater than 0.3 V, it will automatically switch to the measurement AC current mode; d. Enter the measurement resistance mode and measure Averify the last two times and record the average value. If the average resistance value is less than 2 kiloohms, the measured resistance value will be displayed. If it is greater than 2 kiloohms, it will jump to the AC current measurement mode; and e 2. Enter the AC current measurement mode. Take the same measurement three times and average the next two times and record the average value. If the average AC current is greater than 2 0 0A (Ampere), the AC current measurement overflow level will be displayed. Signal, if between 0.2 ~ 2 0 0 〇A range Inside, the measurement result is displayed as AC current and its value, and if the average value of AC current is less than 0.38, it is displayed as the resistance measurement overflow signal 0L. This allows the meter to be controlled by a single button. Switching, saving the operation and time of operating the meter, and hooking the meter on any line to facilitate the observation of measured values, improve its convenience and efficiency, and prevent users from manually adjusting the meter, causing damage to the watch body and endangering it Self-safe, industrial safety person who can greatly improve high-current measurement applications. The detailed operation and function of the composition of the present invention will be further explained by the following embodiments and attached drawings: [Detailed description of specific embodiments] As shown in Figs. 1 to 5, a full set of the present invention is provided. The automatic hook type electric meter mainly includes: a meter body 1, an automatic judgment switching mechanism 2, and a priority detection mechanism 3. The meter body 1 is provided with a display 1 1 and a single control key 1. 2. The main body 1 is provided with a test probe 1 3 for a suitable plug-in line, and a current cooler 14 is provided at the upper end for receiving a current-carrying conductor 1 5. The automatic judgment switching mechanism 2 is provided by the scale body 1 when the power is turned on Judgment and selection for external input conditions, with four measurements: DC voltage mode, AC voltage mode, resistance mode, and AC current mode; and the priority detection mechanism 3, in automatic switching mode, to test probe The input signal of pin 1 3 takes priority, and the input signal of current clip 1 4 is secondary; by this, the meter body 1 can be controlled by a single button to automatically and intelligently switch, saving the action and time of operating the meter, using the current clip 1 4 Hook the meter on any line to facilitate the observation of the measured value, improve its convenience and efficiency, and prevent users from making adjustments by themselves, causing damage to the meter body and endangering their own safety, and can greatly improve the industrial safety of high-current measurement applications. .

y? {79 ^ V

------------- ~ I .. V. Description of the invention The present invention 'makes it possible to change the top-inch better control keys in a timely manner. Keep in shutdown, small mode. :: Shih '. A buzzer can be set in the main body of the meter to provide sound. The meter mouth = is lower than the bottom, making the three-use meter easier; One hand can be operated by hand, so that ^ can be activated by holding one of the three-meters, and it also serves as the start-up control of the transient hold mode (HOLD) mode. After the meter is turned on, it can also have the dual function of holding the measurement result on the display 1 1. It can be used to measure the surname when the HOLD mode is performed. In 2 seconds, it is °. In 2 seconds, it starts the H0LD mode. Press it again to cancel the HOLD voltage mode. The mode is master. When the mode number is current, there will be electricity + invention formula. When the current Λ alternating current is obviously lost, according to the above table, the current itself can be measured according to the above table. The current itself can be measured by the preferential clamp 1 4 voltage mode voltage. An input type of the moulding mode dynamic detection detector or an electrical resistance to the resistance The characteristics can allow the above formula to correctly switch between self and one intersection. The measurement signal of 3 is the relative current value of the resistance mode. The overflowing user observes and shows the current switching mechanism of the current switching mechanism. Pin 1 3 pairs, that is, the test probe 1 measurement value, when there is no current clamp Ω (ohm) ”in the measured voltage measurement value, no measured voltage or 2, DC power, and a resistance mode meter The input signal for automatic switching is that when the DC voltage 3 can measure the signal, it will display 1 and 4 will not measure 0L ”. When it is resistance, you can talk about the resistance value on the edge line, and

Page 8 5 [Wftl2 7 ^ Ph year and month two — ·., ... ϊ. · — ----------- 5. Invention 发明 ^ ΓΥβ) When measuring current only clamp 1 4 Change the number of the meter to be used and manually change the slot. The present invention is set to voltage mode, current) Whether the voltage is 1 · 4V or whether it is small or not. In the explicit voltage mode, if the resistance to be measured is resistance, the current is greater than the current. . To measure the current, if the probe is larger than the negative indicator, whether it is small or not can be switched by a different signal known by the current, that is, the AC is preset to cut off (the AC is greater than the AC component or the DC power measured at both ends). Is there a minus pin at both ends? 1 3 Open circuit without input signal. Therefore, the application of this three-meter can provide convenience and safety. It is not necessary to measure. 0 When a single control key 1 2 is activated, there is a voltage at both ends of the pin 1 3. Input, it will judge 0.9V (volt), DC (direct current) voltage is 0 · 1 V, if it is judged again, the direct current component and the AC with the matching component shown on 1 1 will switch to the resistance mode and judge the test probe at 2 0 0 0 ohm, if it is less than that, it displays the current mode and judges the current mode of the current clamp and its measuring method as shown in Figure 4. # In the present invention, after the initial setting, the battery quantity is detected first, then Measure the DC DC voltage j three times to measure the stomach and record the average after 2 times, and then measure the AC "voltage the same three times to measure the average of the last 2 times to record the average, and then perform the following series of judgments: | | a. If the measurement result is DC D When the C voltage is greater than 1000 volts and the AC ACt voltage is too high = 1000 volts, the AC / DC voltage overflow 〇L signal will be displayed. If the AC (1 measurement value is not greater than 1000 volts, it will only display DC voltage overflow 〇L signal b, assuming that the DC measurement results are between 1.5 ~ 1 〇 〇 〇 0 and less than or equal to negative 0 · 2 V, then AC a C judgment, if greater than 1 00v, then display Alternating current

Page 9e Constant current circuit 9 Correct two μ ± — signal of pressure overflow level 0L, if it is not above, when the average value of AC AC voltage is greater than the average value of DC DC voltage which takes the absolute value, the measured AC current is displayed And its value is displayed, otherwise the measured AC power is displayed and its value is displayed. c. If the measured DC voltage is lower than 1.5V and the AC voltage is not greater than 0.9 V, the absolute value of the measurement result of the DC voltage will be less than or equal to negative 0 · 3 V. , It will automatically switch to measuring resistance mode, if it is greater than 0 · 3V, it will automatically switch to measuring AC current mode. d. Enter the resistance measurement mode. Measure 3 times and average the next 2 times and record the average value. 'If the average resistance value is less than 2 kiloohms, the measured resistance value will be displayed. Skip to the measurement “current mode.” Enter the AC current measurement mode. The same measurement 3 times will average the next 2 times and record the average value, and judge if the average AC current is greater than 2000a (Amp) then Display the signal of AC current measurement overflow 0L. If it is in the range of 0.3 ~ 2 00 0A (Ampere), the measurement result will be displayed ^ ac current and: member: its value, and if the average value of AC current is less than 03a Displayed as the signal of resistance summer overflow Ω 0L. Please refer to Figures 1 and 5 for the circuit system basin of the present invention, except for the aforementioned LCD display unit, buzzer unit 6 and control power circuit, 9 | 9 and HOLD mode with a single control key 1 2 and more include: a coupling with the test probe i 3 an attenuation circuit 9 〇 and a protection circuit 2 are provided in the resistance mode ~

Test current to protection

Page 10 5 | 7 Er—January 1 Circuit 9 1; Pass the current through the pair of controls ^ l 1 η V Disregard the outer soil * $ Pin 1 3 and one of the unknown lightning resistance RX in between, straddling the The resistance of the unknown electric nozzle p YL can be judged according to the following formula: The voltage drop across x can be measured, and the electrical RX = voltage drop / test current. The resistance mode can also include a remote connection ^, 〇 ^ 1 ^ ^ W φ, continuous, and sexual test, in which the resistance between the pair of probes β 1 "and the value is regarded as a short circuit, and it is indicated by the bee drink 5 | 16 sound. A switching circuit 9 3 is used for 4:77 J to prepare the private signal. The source of the input signal is the residual current, so the circuit number or the reducing circuit 9 0 ACV (AC power), DC voltage. ) Or the resistance signal of the test circuit 9 6 'and output the DC signal (signal,-f device and display controller 9 5, format and convert the digital measurement value at the selected measurement mode to the display 1 1 The required grid '^ controls the gain of the current sensing circuit 94, and the attenuation ratio of the attenuation circuit 9 02' (AC voltage), and controls the sound of the buzzer 16; v-resistance ㈣ Road 96, ㈣ is being measured by the second type of voltage or resistance to provide a control switching circuit 9 3 ^ Feng electrical 9 5 for switching judgment and display resistance value; /, ",, show control a current sensing circuit 9 4, including the current clamp 1 4 of the amplifier, voltage divider, and ^, so that the current detection of the current clamp 1 4 produces an L, 221, and sends it to the AC filter rectifier circuit 9 7 to convert _ 交 产 = ^ 彳 " DC signal coupled to digital measured value; and L ° 5 tiger becomes suitable for an analog / digital converter 9 8, which converts the measured value and sends it to the instrument and display controller 9 5 as the display value. To 5 bar condition and display 577 ^^, modify __? 93 Jti I " " 丨 V. invention description (9) wherein the attenuation circuit 90 provides an adjusted input voltage to the aforementioned switching circuit 93 and. The AC filter rectifier circuit 97, the switching circuit 9 3 is output by the instrument and the display controller 9 5 to the analog / digital converter 9 8 according to the current measured mode output voltage or current signal. ; And the instrument and display controller 9 5 control according to the nature of the input signal Size determines the mode to be measured, to control the switching state of the circuit 93 and 11 of the device shown Gu, and receives ,, maintaining state of the display 11 in accordance with the length of time of the signal sent by the control signal from the key 12 or the shutdown.

According to the aforementioned hardware and firmware combined with the actual manufactured product, it can provide the following functions in measurement, making the operation of the meter more user-friendly and easy to use:

1 · Automatic judgment switching mechanism 2 Auto Selection FunctionU SF) includes Ω (ohm range), V = (DC voltage range), v ~ (AC voltage range), A ~ (AC current range), 〇 > > (sound File), after starting ASF at boot, the preset starts with DC voltage DCV, and LEd should display the AUTO SET symbol. 2 · DATA HOLD mode does not start when power on, press one when power on

Press the lower control key 1 2 to start in less than 2 seconds. 'If you press more than 2 seconds, it will be | machine'. H0LD will beep once and the LCD will display the Η symbol. At this time, the full I surface will not change and the ASF function will be stopped. A / D (AC / DC) measurement does not '^ switch to other functions' HOLD function is turned off again when it is turned off. 3 · When returning to DCV measurement, first check whether A / D has | Low Battery (low battery) signal, if there is a battery symbol

Twelfth may V. Description of invention (10), and then measure D C V.丨 4 · In the initial state of power-on, the LCD will be fully illuminated. 5 · When the user does not operate after 30 minutes from the last operation, the user will shut down the i-line or the user presses the control button 12 for more than 2 seconds, the LCD I will be cleared and an alert will sound. 6 · Other warning conditions: One beep when changing the LCD display function, one beep when turning on the LCD, one beep when shutting down, if the ohmic value is less than 100 Ω (ohm), the sound will continue, and when the HOLD function One beep when starting and shutting down and one when overflow occurs. The preferred embodiments of the present invention have been described above. Those skilled in the art can make other improvements based on the above description, but these changes | changes still belong to the spirit of the invention and defined below Patent scope. From the above detailed description, those skilled in the art can understand that the present invention can indeed achieve the aforementioned purpose, and that it has industrial use value that has already complied with the provisions of the Patent Law, and filed an application for an invention patent in accordance with the law.

Page 13 STJWt Year Na -ft * Fresh Sa Sa [Illustration of the Drawings] Figure 1 is a three-dimensional appearance of the present invention. Figure 2 is a flow chart of the automatic judgment switching and priority detection mechanism of the present invention. Figure 3 is a control flowchart of a single control key of the present invention. Figure 4 is a detailed flowchart of the automatic judgment switching mechanism of the present invention. Fig. 5 is an internal circuit diagram of the smart card according to the present invention. [Illustration of Schematic Symbols]

1 Main body 1 1 Display 1 2 Control key 1 3 Probe 1 4 Current clamp 1 5 Current carrying conductor 1 6 Buzzer 2 White motion judgment switching mechanism 3 Priority detection mechanism 9 0 Attenuation circuit 9 1 Protection circuit 9 2 Constant current circuit 9 3 Switching circuit 9 4 Current sensing circuit 9 5 Instrument and display controller 9 6 Resistance detection circuit 9 7 AC filter rectifier circuit 9 8 Analog / digital converter 9 9 Power circuit

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Claims (1)

57799 ^ — ^^ This! 〇 · 2 7 revised A full-automatic one-meter main body is provided with a current conductor; an automatic judgment is made in the input situation; an AC voltage is measured; a two-input letter is borrowed for use with high stool and large electricity, and this type of detection or electric current flow is as priority The inspection number is superior, so that time, profit and effective flow measurement, please use a patented gauge at the two ends of the needle, and the phase displacement amount is displayed on the patented hook-type body. Test the cutting and cutting mode and test machine first. The gauge will Electricity rate, application range: The DC range has a pair of electricity meters to measure the display range. It mainly includes: a display, a single control key, the top of the main pin, and a current clip for storing a load exchange mechanism. The main body of the scale is selected for the external fault, and it has a DC voltage mode, a resistance mode, and an AC current mode. After starting, it is kept in the actuator mechanism, and it can be operated by a single meter. The first voltage and voltage value, the resistance file, the first control transient, the input letter of the downstream clip is automatically switched to control the automatic wisdom on any line to improve safety and avoid industry security By. The full self-mode and AC power input can measure the open-circuit current value of the test probe. If the connected n 0Ln overflow status is used, the full-auto key described in the item can be used for the three-purpose electricity hold mode. In the power-on state, the input number of the test probe is secondary; the smart switch saves operation and facilitates observation of measurement values to improve the adjustment and adjustment of the hook-type meter, and the voltage is displayed in the medium voltage mode or the resistance mode number. If no signal is input, the current clamp is displayed and the electrical state cannot be measured. Dynamic fishing meter, where the meter is turned on and off, and the type is used to press the measurement knot for more than 2 seconds 3 correction compensation allowance 6, patent application g 0 is off, and less than 2 seconds to start the HOLD mode, Press again to cancel HOLD mode. 4 · The full-automatic hook-type electric meter described in item 1 of the scope of patent application, in addition to the aforementioned single control key of the LCD (liquid crystal display), buzzer and control power, the internal constituent circuits include: a test probe Coupling an attenuation circuit and a protection circuit; a certain current circuit provides a test current to the protection circuit in the resistance mode; a switching circuit for switching the source of the input signal to a current sensing circuit, an attenuation circuit or a resistance detection circuit Signal and output DC signal; an instrument and display controller, according to the selected measurement mode, process the format of the digital measurement value and convert it to the format required by the display; a resistance detection circuit, which is detecting the current measurement The type of the signal is voltage or resistance, to provide a control switching circuit to the instrument and display controller for switching interpretation and display resistance value; a current sensing circuit, including an amplifier, a voltage divider, and the aforementioned current clamp, current The clip detection stream generates an AC signal and couples it to the AC filter rectifier circuit to convert an AC signal to become suitable for conversion. DC signal value measured amount number; and an analog / digital converter, converts the measured value into a digital measurement value, and the display controller sends to the instrument, as the condition display of the interpretation and displayed. 5 · Fully-automatic hook-type electricity meter as described in item 4 of the scope of patent application, where The attenuation circuit improves the voltage and the voltage of the driver. It is controlled by the aforementioned switching electrical controller. According to: the switching circuit is now controlled by the instrument and the display piezoelectric. $ F κ According to畲 = to analog / digital converter corresponding to the measured mode output. The full-automatic hook-type electric meter described in Item 4 of the Xiyi prisoner: The nature and size of the input signal of the display controller determines the SiΪ 5 5 * to control the state of the switching circuit and the display: receiving by the button The lack of transmission. 4 The state of the device or the duration of the shutdown number is maintained. It shows the fully automatic hook-type meter as described in item 1 of the target. Second middle: the main body of the table is made narrower than the bottom. The three-purpose electric meter Π and i 隹 main parts are better designed so that the three-purpose electric sacrifice can be operated by hand, and there is a buzzer inside. Its Ϊ:, 工 ', σ to include a continuity Test, at this small :: The resistance of the critical resistance value is regarded as short ... through the display; :: an acoustic indicator to indicate. Ding Pihe; ϊ ϊ ί Ϊ hook-type meter measurement method 'It includes the patent application: the structure around the first item' Among them, the f Hai meter enters the initial clock when the meter is set to determine the amount of DC, first measure the DC For DC voltage, measure 3 times and record the average value after 2 times, and then measure AC ac voltage. After the same measurement 3 times, record the average value after 2 times, and then perform a series of judgment actions: a. If Measurement results: DC voltage is greater than 丨 〇00〇. (Volt) and AC ac voltage is greater than 1 000W. Page 17 Rev. 77991 Revised 丨 Only the OLV signal for patent application range will be displayed when 1 0 0 0V is exempted. If the AC measurement value is not greater than the DC voltage overflow 0L signal; b. Assuming the DC DC measurement result is between 1 · 5 ~ 1 0 0 0V and less than negative 0 · 2V for AC AC judgment. If it is greater than 1 οοον, it displays the OL signal of AC voltage overflow. If it is not greater than, it means that the average value of AC AC voltage is greater than the absolute value of DC. ]) When the C voltage is averaged, the measured AC is displayed and its value is displayed. If the foregoing judgment is otherwise displayed, the measured value is [^ AC and the value is displayed; c. If the measured DC DC When the voltage is lower than 1 · 5V and the AC AC voltage is not greater than 0 · 9 V, the absolute value of the measurement result of the DC voltage will be automatically switched to the measurement resistance mode if the absolute value of the measurement result of the DC voltage is less than or equal to 0.3 V When it is greater than 0.3V, it will automatically switch to AC current measurement mode; d. Enter the measurement resistance mode, measure 3 times, average the last 2 times and record the average value, and judge if the average resistance value is less than 2 kiloohms. 'Shows its measurement If the resistance value is greater than 2 kiloohms, jump to the AC current measurement mode; and e, enter the AC current measurement mode. The same measurement 3 times will be averaged after 2 times and the average value will be recorded, and the average AC current will be judged. If the value is greater than 2000A (Ampere), the signal of ac current measurement overflow level is displayed. If it is in the range of 0 · 2 ~ 2 0 0 0 A, the measurement result is AC power / claw and it is displayed. Value, and if the average value of AC current is less than 0.3 A, it is displayed as a signal of resistance measurement overflow level 0L. Page 18 Figure 2 577991 丨 92. 2 7 Figure 3 Data suspension 577991 577991