JPS6185019A - Regulation detecting load appliance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection load of the m11B regulation, and particularly to a detection load of the m11B regulation.

Electric and electronic till devices generally operate by receiving power from a commercial power source via an outlet installed indoors, but in such cases, it may not work even if the electrical device is actually plugged into the outlet. Or it may not work properly. This situation occurs even though all the necessary characteristics have been considered and there are no problems when installing the equipment indoors. Such a situation is usually only known after the actual installation of the electrical equipment, as mentioned above. At this time, it goes without saying that it will be necessary to newly construct or make changes to the indoor wiring and other electrical power systems, but it is important to carry out equipment expansion work in accordance with the generally accepted procedures. The disadvantage of doing so is that it becomes impossible to draw up detailed plans for construction costs for this type of work in advance.

The present invention solves the above-mentioned drawbacks, and is a regulation detection load device that makes it possible to accurately determine the necessary cost and number of days at the advance planning stage when adding electrical equipment, etc. Hereinafter, the regulation detection loader of the present invention will be explained in detail with reference to the drawings. Fig. 1 is a block diagram of one embodiment of the present invention, and Fig. 2 is a block diagram thereof. It is a flowchart.

In FIG. 1, 1 is a variable load device, for example, a load device 3 having a different resistance value from the rotary switch 2.
．． It consists of 4.5... A semiconductor load device may be used as the load device. Reference numeral 6 denotes a potential transformer (P, T,) whose negative winding 7 is connected in parallel to the variable loader 1, and also connected to a plug 9. Reference numeral 10 denotes an AC-DC converter circuit, the input of which is connected to the secondary winding 8 of the automatic transformer 6, and has a rectifier circuit inside.

Reference numeral 11 denotes a sample and hold circuit, which holds the direct current generated by the AC-DC conversion circuit, and has a capacitor therein, and is brought into a set state and a reset state by inputting a signal to be described later. 12 is an analog-to-Bretal conversion word that converts the analog waveform output from the sample and hold circuit 11 into a digital signal. 13 is LE
It is a decoder driver for D lighting, and 14 is an example of ζ
The f7 segment LED display lights up and displays numerical values, and the numerical values mainly indicate voltage. 15
is an address in a microprocessor! A ROM memory circuit 16 is connected through the bus, data bus, and control bus, and a flowchart of the program for the contents stored in the memory circuit 16 is shown in FIG. 17 is a boat circuit which receives signals from a set push button and a reset push button, which will be described later, and outputs a control rllJ signal for the sample hold circuit 11 and the relay. 18 is a set push button, and when pushed up, the port time is set! i17 is HIGH
level to LOW level. Reference numeral 19 is a reset push button, and when pushed up, the port circuit 17 changes from a HIGH level to a LOW level similarly to the set push button 18. 20 is a relay which closes the relay contact 22 for a short time when the driver 21 receives a HIGH level signal from the output port of the port circuit 17.

Next, to further explain how to use the regulation detection loader of the present invention, when using it, first insert the plug 9 into the outlet where you want to know the line regulation (fluctuation), and then select the variable loader 1. do. That is, the rotary switch 2 is manually operated to switch the switch to one of the load devices 3, 4, 5, . . . . Next, press the reset pushbutton 19 to initialize the sample hold circuit 11, and press the set pushbutton 1 with ξ.
Press 8. When the above operation is performed, a HIGH signal is output from the output port of the port circuit 17 for a certain period of time specified by the program, for example, 50 mg to 100 m5.
This temporarily closes the switch 22 for a short time and the sample voltage is input from the potential transformer 6. The potential transformer 6 reduces the voltage to an instrument voltage, the AC-DC converter 10 converts it to DC, and the capacitor of the sample hold @$11 is charged. At the time of completion of charging, HIGH4M is output from the output port of the port circuit 17 to cut off the discharge path. In this way, the sample voltage is held in the form of direct current in the sample and hold circuit 11, and this non-discharge voltage is converted from an analog signal to a digital signal by the analog-to-digital converter 12, and then sent to the LED display 14, for example, via the decoder driver 13. The light will remain on for at least a legible amount of time.

For example, the quality of 100 ■ commercial fit sources! If approximately 100■ is displayed on the LED display 14 during verification, it is determined that there is no problem with the line regulation of this commercial power supply, and in this case, it indicates that the additional equipment can be installed and used. become. On the other hand, 100v
If the following voltages are displayed, work on the power supply line may be required.

As mentioned above, the regulation detection word of the present invention is
Using any variable resistor @1 as a load, momentarily close a circuit with such a load, sample and hold the voltage between them, and display the voltage value on the LED display 14. The power system wiring has
Since it is possible to detect Ns-road regulation and radiation, it has the remarkable effect of being able to accurately estimate the construction cost at the planning stage before the start of the expansion work.

In addition, although the above explanation was mainly about AC commercial current, it goes without saying that it can also be used for DC current for telephones and the like.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the regulation detection load type of the present invention, and FIG. 2 is a flowchart of a program in a ROM storage circuit. 1... Variable load device 6... Potential transformer 10... AC-DC conversion circuit 11... Sample hold circuit 12... Analog-digital conversion circuit 14... Display 15... Microprocessor 17 ...Port circuit 18...Set push button

Claims (1)

[Claims] Connect the variable loader to the power line to be measured for a short time, supply power to the variable loader, sample and hold the voltage drop at this time, and display the status in analog or digital form to regulate the voltage of the power line. A regulation detection load device that detects.