JPS58131639A - Measuring method of potential distribution in tube of fluorescent lamp - Google Patents

Abstract

PURPOSE:To measure distribution of potential in a tube of a general fluorescent lamp from the outside with simple operation, by both adapting a measuring terminal of a voltmeter to an external wall of the glass tube of the fluorescent lamp under its normally turned-on condition and moving the measuring terminal along the axial direction of the lamp tube. CONSTITUTION:A general fluorescent lamp 3 is turned on by a power source 9 through a turn-on circuit 10, and one probe 12 of an A, B two-channel oscilloscope 11 is contacted between lamp electrodes while the other probe 13 is contacted to an optional point on an external wall of a glass tube 2. Further use of the oscilloscope 11 having a memory function, in which measurement data can be stored, is convenient, however, a measuring device of circuit testers or the like may be used.

Description

[Detailed description of the invention] The present invention relates to a method for measuring the potential distribution inside a fluorescent lamp.

As a method for measuring the potential distribution inside the fluorescent rung tube, I
The I-needle method or the indirect measurement method using a conductor tube is known. The probe method, as shown in Figure J@1, is a method of measuring using a special lande in which several probe holes are inserted into 20 locations of an f-lass tube whose inner surface is coated with fluorophore. According to this method, not only does it take time and effort to prototype a special rung, but also the presence of the protruding portion 4 of the glass tube where the probe l is inserted makes the tube wall temperature different from that of a normal one. Because the probe 8, which is a conductor, is inserted into the tube, an olK phenomenon occurs, such as the potential distribution inside the tube changing, and because a means to measure the potential distribution is added, the measured value that should be obtained cannot be obtained. There were flaws. In addition, in the joint measurement method using four bills, as shown in the first intention, the glass tube IK conductor foil of the fluorescent tube 1i is wound and attached to form the conductor foil ring 6, and the wI conductor foil ring is attached. To 6.

An integral circuit i consisting of a resistor capacitor is connected, and its integral output is detected by a signal detector 8 such as an Otsuvroscope or a desta, and a conductive foil dangling 6 is moved on the FSS tube 2 to measure the potential distribution. However, although this method does not require the special rung mentioned above and can be measured using a general fluorescent tube 1, it has the drawback of requiring a conductor ring, an integrating circuit 7, etc. Ta.

The present invention has been made to eliminate such drawbacks, and its purpose is to provide a method for measuring the potential distribution inside a general fluorescent rung tube from the outside with a very simple operation. be.

FIG. 1 is a conceptual diagram explaining the measurement method according to the present invention.
A general fluorescent rung 8 is lit by a power supply 9 through one lighting circuit vagina, and one globe of the Mu-B2 phenomenon tV Roskog U is connected between the lamp electrodes, and the other probe I
3 is brought into contact with an arbitrary point on the glass tube outer 11. In addition,
It is convenient to use a Roscoe fn having a memory function that can store measurement data, but it is of course possible to use a measuring instrument such as a tester.

Figure 4 shows the signal waveform measured by the above-mentioned measurement method. In the figure, the waveform is the signal voltage waveform at an arbitrary point in the axial direction of the lung tube detected by the glow pro, and the waveform - is detected by the globe ν. There are nine voltage waveforms.

This signal voltage waveform aid is considered to be a differential waveform due to junction with the capacitor 1 on the tube wall of the glass tube 2, and the effective value or peak value of the signal voltage waveform i at each point along the Lang tube axis direction is expressed as the total length of the lamp. Watarate Pu 0? A graph as shown in Figure 15 was obtained.

In addition, in FIG. 6, the nine fluorescent Ununglers shown below the horizontal axis are for comparing the above-mentioned measurement points and the rung positional relationship.

Therefore, the slope of the part that can be regarded as a straight line in the center of the graph in Figure 6 and the positive column potential gradient obtained using the above-mentioned and other measurement methods for rung 6 of v4- are the same values. This was confirmed.

Therefore, the potential distribution shown in FIG. 6 is considered to represent the potential distribution within the lamp tube. Furthermore, as is clear from FIG. 6, an upwardly convex peak value is shown at a position corresponding to both electrode portions, and by utilizing this, it is possible to know the electrode position from outside the rung.

As described above, according to the present invention, the potential distribution inside the tube of a general fluorescent rung can be very easily measured using only a voltage measuring instrument such as a #V rososcope.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view showing a special fluorescent rung for conventional O potential distribution measurement, the first intention is a conceptual diagram explaining a different conventional potential distribution measurement method, and Fig. 8 is a measurement method according to the present invention. FIG. 2 is a conceptual diagram showing one embodiment of the invention. Figure 44 shows the signal voltage waveform observed in OV Roscog by the above method, and l1IJi- is an example of the potential distribution actually measured by the above measurement method.One patent applicant: Takemoto, patent attorney Matsu F Electric Co., Ltd. Toshimaru (and 2 others) Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A method for measuring the potential distribution inside a fluorescent rung tube, which comprises measuring the potential distribution inside the tube over the entire length of the rung.