JPH0679041B2 - Charge indicator - Google Patents
Charge indicatorInfo
- Publication number
- JPH0679041B2 JPH0679041B2 JP61272873A JP27287386A JPH0679041B2 JP H0679041 B2 JPH0679041 B2 JP H0679041B2 JP 61272873 A JP61272873 A JP 61272873A JP 27287386 A JP27287386 A JP 27287386A JP H0679041 B2 JPH0679041 B2 JP H0679041B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- voltage
- crystal display
- display element
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 49
- 230000005684 electric field Effects 0.000 claims description 23
- 239000004020 conductor Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000036626 alertness Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は、電気機器や導体に取り付けて、そこに交流電
圧が印加されているのかあるいは無電圧状態であるのか
を検出表示する課電表示器に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to an electricity display that is attached to an electric device or a conductor to detect and display whether an AC voltage is applied to the electric device or a no-voltage state. It is related to vessels.
「従来の技術」 電気機器や導体に電圧が印加された状態、すなわち電気
機器や導体の課電状態を表示する課電表示器は、電源装
置や増幅器を使用せず、基本的には液晶表示素子に集電
板を接続して構成された表示器である。集電板は導電性
材料の補助電極で、課電表示器の電界検出部であり、電
気機器や導体が課電状態になると電圧が誘起される。"Prior Art" A voltage indicator that displays the state of voltage applied to electrical equipment or conductors, that is, the electrical charge state of electrical equipment or conductors, is basically a liquid crystal display without the use of a power supply device or amplifier. It is a display configured by connecting a collector plate to the element. The current collector plate is an auxiliary electrode made of a conductive material, which is an electric field detection unit of a charge indicator, and a voltage is induced when an electric device or a conductor is in a charge state.
従来の課電表示器の構成とその動作原理について、第６
図を用いて説明する。図中４は液晶表示素子、40は液
晶、41、42は液晶40は挟む２つの透明電極である。また
11と12は２枚の集電板で、ここでは11を機器側集電板、
12を大地側集電板として区別する。これらは課電表示器
９の電界検出部１を構成し、それぞれ液晶表示素子４の
透明電極41および液晶40を挟んで相対する他の透明電極
42の端子ｇおよびｈに２本のリード線13で接続されてい
る。端子ｇが電気機器または導体50にリード線８で直結
された場合は、機器側集電板11は不要であり、この場合
は大地側集電板12と電気機器または導体50が電界検出部
１を構成することになる。Regarding the structure and operation principle of the conventional charging indicator,
It will be described with reference to the drawings. In the figure, 4 is a liquid crystal display element, 40 is a liquid crystal, and 41 and 42 are two transparent electrodes sandwiching the liquid crystal 40. Also
11 and 12 are two current collecting plates, where 11 is a device side current collecting plate,
12 is distinguished as a ground side current collector. These constitute the electric field detection unit 1 of the charge indicator 9, and the other transparent electrodes facing each other with the transparent electrode 41 and the liquid crystal 40 of the liquid crystal display element 4 interposed therebetween.
It is connected to the terminals g and h of 42 by two lead wires 13. When the terminal g is directly connected to the electric device or the conductor 50 by the lead wire 8, the device side current collecting plate 11 is unnecessary, and in this case, the ground side current collecting plate 12 and the electric device or the conductor 50 are the electric field detecting unit 1. Will be configured.
ここで、電気機器または導体50と大地60の間に交流電圧
VOが印加されると、前記電界検出部に、その大きさと幾
何学的配置によって定まる電気量を持つ交流電圧VLが誘
起され、この電圧VLがそのまま液晶表示素子４の両透明
電極41、42の間に加わる。今、液晶表示素子４の静電容
量をCL、大地側集電板12と大地60との間の静電容量を
CO、電界検出部１自身の持つ静電容量をCA、電界検出部
１と電気機器または導体50との間の静電容量をCSとす
る。これら各静電容量の間には一般にCL＞＞CS〜CA＞＞
COの関係があるので、この関係を考慮すると液晶表示素
子４の両透明電極41、42の間に誘起される電圧VLの大き
さは VL≒（CO／CL）VO ・・・・（イ） で示される。COの大きさは一般に大地側集電板12の大き
さに比例し、CLの大きさは液晶表示素子４の表示パター
ンの面積に比例する。課電表示器９は、この電圧VLが液
晶表示素子４のしきい値電圧VTを越えると、電気機器ま
たは導体50が課電状態にあることを表示する。この時、
液晶表示素子４には IL＝ωCL VL≒ωCO VO ・・・・（ロ） で示される表示電流ILが流れ、見掛上 Ｗ＝ωCL VL 2≒ωCO VL VO ・・（ハ） で示される皮相電力Ｗが消費される。ここにω＝２π
であり、は交流の周波数である。Here, the AC voltage between the electrical equipment or conductor 50 and the earth 60
When V O is applied, an AC voltage V L having an amount of electricity determined by its size and geometrical arrangement is induced in the electric field detection unit, and this voltage V L is directly applied to both transparent electrodes 41 of the liquid crystal display element 4. , 42 between. Now, the capacitance of the liquid crystal display element 4 is C L , and the capacitance between the ground side current collector plate 12 and the ground 60 is
C O, the electrostatic capacitance of the electric field detecting unit 1 itself C A, the capacitance between the electric field detection unit 1 and the electric device or conductor 50 and C S. Generally, C L >> C S to C A >>
Since there are relationship between C O, magnitude V L ≒ (C O / C L) V O · the voltage V L to be induced between the two transparent electrodes 41 and 42 and consider this relationship liquid crystal display element 4 ... (a) The size of C O is generally proportional to the size of the ground side current collector plate 12, and the size of C L is proportional to the area of the display pattern of the liquid crystal display element 4. When the voltage V L exceeds the threshold voltage V T of the liquid crystal display element 4, the voltage indicator 9 indicates that the electric device or the conductor 50 is in the voltage applied state. At this time,
Display current I L flows represented by I L = ωC L V L ≒ ωC O V O ···· ( ii) the liquid crystal display element 4, MiKakeue W = ωC L V L 2 ≒ ωC O V L Apparent electric power W shown by V O ··· (C) is consumed. Where ω = 2π
And is the frequency of the alternating current.
「発明が解決しようとする問題点」 従来の課電表示器９は集電板11、12に誘起される電気エ
ネルギーによって液晶表示素子４を動作させるものであ
るため、電気機器または導体50への印加電圧が6kV程度
以下では、前記（ロ）式に示す表示電流ILを流すため
に、かなり大きな大地側集電板12を必要とした。しか
し、大地側集電板12の大きな課電表示器９は、それを取
り付ける導体の絶縁間隔や電気機器の対アース間絶縁距
離を短くするため、大きさに制限がある。そのため、肝
腎の課電状態を示す液晶表示素子４の表示パターンが、
課電表示器９の大きさに比較して貧弱になる傾向があっ
た。また、表示パターンが静止しているため、印刷物と
同様な印象を与え、課電状態の注意喚起力が弱いという
欠点があった。本発明はこれらの欠点を克服し、低い電
圧においても大きな表示パターンを持つ液晶表示素子４
を使用可能とし、さらに点滅表示も可能とするなど、従
来の課電表示器９の注意喚起力を大幅に改善する方法に
関するものである。“Problems to be Solved by the Invention” Since the conventional charging indicator 9 operates the liquid crystal display element 4 by the electric energy induced in the current collectors 11 and 12, the electric power source or the conductor 50 is not affected. the applied voltage is more than about 6kV, in order to flow the display current I L shown in (b) below, to require a fairly large ground-side collector plate 12. However, the size of the electricity display 9 having a large ground-side current collector plate 12 is limited in order to shorten the insulation distance between the conductors to which it is attached and the insulation distance between the electrical equipment and the ground. Therefore, the display pattern of the liquid crystal display element 4 which shows the charged state of the liver and kidney is
Compared to the size of the charge indicator 9, it tended to be poor. Further, since the display pattern is stationary, there is a drawback that it gives an impression similar to that of a printed matter and has a weak alerting power in a power-on state. The present invention overcomes these drawbacks and has a liquid crystal display element 4 having a large display pattern even at a low voltage.
The present invention relates to a method for significantly improving the attention-giving power of the conventional electricity-charging display device 9, such as enabling the use of a flashing display and a blinking display.
「問題点を解決するための手段」 従来の課電表示器９の電界検出部１と液晶表示素子４の
間に、その電界検出部１の出力を整流する交直変換部
と、前記交直変換部の出力を時間平均的に電源の交流周
波数より低周波の駆動電圧波形として液晶表示素子４に
印加する分周回路からなる駆動回路部とを設ける。“Means for Solving Problems” Between the electric field detection unit 1 and the liquid crystal display element 4 of the conventional electric charge indicator 9, an AC-DC conversion unit that rectifies the output of the electric field detection unit 1, and the AC-DC conversion unit. And a drive circuit section composed of a frequency dividing circuit for applying the output of the above to the liquid crystal display element 4 as a drive voltage waveform having a frequency lower than the AC frequency of the power supply.
「作用」 はじめに、本発明の必須要件を構成する「時間平均的に
みて電源周波数より低周波の駆動電圧波形」について第
５図で説明する。液晶表示素子の駆動電圧波形は一般に
は第５図（ｂ）に示すような矩形波であるが、従来の課
電表示器９の場合は電気機器や導体からの誘導電圧で動
作するので第５図（ａ）に示す正弦波である。図中ｔは
駆動電圧波形の周期であり、周波数は、＝1/tで示
される。この周波数が課電表示器を取り付けた電気機
器や導体の電源周波数、たとえば商用周波数より小さけ
れば、第５図（ａ）および（ｂ）の駆動波形はともに前
記必須要件を満たす。第５図（ｃ）および（ｄ）に示す
波形は正弦波と矩形波が繰り返し間欠的に出力されてい
る場合である。図中Ｔは駆動電圧波形の間欠周期、ｔは
駆動電圧波形の周期、ｎは１間欠周期Ｔの間に出力され
る波数である。これらの場合には図に示すTONの期間が
液晶表示素子の表示期間でTOFFが表示休止期間となり、
平均して考えると単位時間あたりn/T個の駆動電圧波形
が液晶表示素子に加えられる。すなわち、時間平均的に
みて周波数ｍは、ｍ＝n/Tで与えられる。このｍ
が電源周波数より低ければ、第５図（ｃ）および（ｄ）
に示す波形は、前記必須要件を満たす。上記の説明は、
考え方を例示したものであって、その他種々の駆動電圧
波形についも適用される。以下、本発明の各構成部分の
作用について詳細な説明を行う。"Operation" First, the "driving voltage waveform of a frequency lower than the power supply frequency in terms of time average" that constitutes an essential requirement of the present invention will be described with reference to FIG. The drive voltage waveform of the liquid crystal display element is generally a rectangular wave as shown in FIG. 5 (b), but in the case of the conventional charging indicator 9, it is operated by an induced voltage from an electric device or conductor, It is the sine wave shown in FIG. In the figure, t is the period of the drive voltage waveform, and the frequency is shown as = 1 / t. If this frequency is lower than the power supply frequency of the electric equipment or conductor to which the charge display is attached, for example, the commercial frequency, both drive waveforms in FIGS. 5 (a) and 5 (b) satisfy the above-mentioned essential requirements. The waveforms shown in FIGS. 5 (c) and (d) are the cases where the sine wave and the rectangular wave are repeatedly and intermittently output. In the figure, T is the intermittent cycle of the drive voltage waveform, t is the cycle of the drive voltage waveform, and n is the wave number output during one intermittent cycle T. In these cases, the T ON period shown in the figure is the display period of the liquid crystal display element, and T OFF is the display pause period,
On average, n / T driving voltage waveforms are applied to the liquid crystal display element per unit time. That is, the frequency m in terms of time average is given by m = n / T. This m
Is lower than the power supply frequency, Fig. 5 (c) and (d)
The waveform shown in FIG. The above description is
This is an exemplification of the concept, and it is also applied to various other drive voltage waveforms. Hereinafter, the operation of each component of the present invention will be described in detail.
第１図は本発明の課電表示器10のブロック図である。電
界検出部１は第６図に示す従来の課電表示器９と同様の
１個または２個の集電板でもよく、機器や導体が課電状
態にあることを検出し交直変換部２に出力する。本発明
で設けた交直変換部２ではこの出力を整流し、駆動回路
部３を動作させるのに必要な、駆動電源とクロック信号
に変換する。更に本発明で設けた駆動回路部３は液晶表
示素子４の表示パターンを表示させるため、前記クロッ
ク信号を分周することにより時間平均的にみて電源周波
数より低周波の駆動電圧波形として出力し、液晶表示素
子４に印加する。FIG. 1 is a block diagram of the charging indicator 10 of the present invention. The electric field detection unit 1 may be one or two current collecting plates similar to the conventional electricity display 9 shown in FIG. Output. The AC / DC converter 2 provided in the present invention rectifies this output and converts it into a drive power supply and a clock signal necessary for operating the drive circuit unit 3. Further, in order to display the display pattern of the liquid crystal display element 4, the drive circuit unit 3 provided in the present invention divides the clock signal and outputs it as a drive voltage waveform of a frequency lower than the power supply frequency in time average. The voltage is applied to the liquid crystal display element 4.
まづ駆動回路部３の作用について説明する。First, the operation of the drive circuit section 3 will be described.
液晶表示素子４の表示に必要な皮相電力は前記（ハ）式
に示したごとく、液晶表示素子４の静電容量や表示に使
用する電源の周波数などに比例する。第６図に示す従来
の課電表示器９は、電界検出部１に誘起される商用周波
数の交流の電気エネルギーを、直接、液晶表示素子４の
表示エネルギーとして使用していた。ところが人間の目
で連続した液晶表示と見える液晶表示素子４の駆動電圧
の周波数は商用周波数より非常に低くてもよい。従っ
て、液晶表示素子４の表示エネルギーを周波数の低い駆
動電圧波形として液晶表示素子４に供給すれば、従来の
表示方式よりも僅かなエネルギーで液晶表示をさせるこ
とができる。それ故、低電圧用電気機器に本発明の課電
表示器10を使用する場合には、より大きな表示パターン
を持つ液晶表示素子４を使用できる。The apparent electric power required for the display of the liquid crystal display element 4 is proportional to the capacitance of the liquid crystal display element 4 and the frequency of the power supply used for the display, as shown in the formula (C). The conventional electric charge indicator 9 shown in FIG. 6 directly uses the alternating-current electric energy of the commercial frequency induced in the electric field detector 1 as the display energy of the liquid crystal display element 4. However, the frequency of the drive voltage of the liquid crystal display element 4 which can be seen as a continuous liquid crystal display by human eyes may be much lower than the commercial frequency. Therefore, if the display energy of the liquid crystal display element 4 is supplied to the liquid crystal display element 4 as a driving voltage waveform having a low frequency, liquid crystal display can be performed with a smaller amount of energy than the conventional display method. Therefore, when the charge indicator 10 of the present invention is used in a low-voltage electric device, the liquid crystal display element 4 having a larger display pattern can be used.
また、特に低周波に変換しなくても、液晶表示素子４を
駆動する電圧波形の出力を間欠的に休止すれば、出力休
止期間は液晶表示素子４はエネルギーを消費せず、この
間に電界検出部１から出力された電気エネルギーは交直
変換部２に溜まる。Further, if the output of the voltage waveform for driving the liquid crystal display element 4 is intermittently stopped without converting to a low frequency, the liquid crystal display element 4 does not consume energy during the output stop period, and electric field detection is performed during this period. The electric energy output from the unit 1 is stored in the AC / DC converter 2.
従って休止期間を含めた時間平均でみると、商用周波よ
り低い周波数の駆動電圧波形を液晶表示素子４に加えた
ことになり、従来の表示方式よりも効率がよくなる。駆
動回路部３の分周回路はその出力側の1/22周波信号の論
理積をとることで電源の周波数より低周波でしかも間欠
的な駆動電圧波形を得ることができるので一層効率的で
ある。このような間欠出力は液晶表示素子４を点滅表示
させる。出力と休止の時間配分を適切に選べば、本発明
の課電表示器10は見やすい間隔で点滅表示し、注意喚起
力を増す上で非常に有効である。Therefore, in terms of the time average including the rest period, this means that the drive voltage waveform having a frequency lower than the commercial frequency is added to the liquid crystal display element 4, and the efficiency is higher than that of the conventional display method. The frequency divider circuit of the drive circuit unit 3 is more efficient because it can obtain an intermittent drive voltage waveform at a frequency lower than the frequency of the power supply by taking the logical product of the 1/2 2 frequency signals on the output side. is there. Such intermittent output causes the liquid crystal display element 4 to blink. When the time distribution of output and pause is properly selected, the charging indicator 10 of the present invention blinks at an easy-to-see interval, which is very effective in increasing attention.
次に交直変換部２の作用について説明する。Next, the operation of the AC / DC converter 2 will be described.
交直変換部２は前述の駆動回路部３の直流電源として必
要な構成部分であるとともに、以下に述べる有効な作用
を果たす。第６図に示す従来の課電表示器９は既述の
（イ）式で示されるごとく、対地電圧VOに対しVO×（CO
／CL）の大きさの電圧VLが電界検出部１に誘起された。
この場合、電界検出部１に静電容量の大きな液晶表示素
子４が直結されていたので、前記（イ）式の分母がCLと
なったのであって、電界検出部１に誘起される電圧が非
常に小さかった。本発明の電界検出部１と液晶表示素子
４は交直変換部２と駆動回路部３を介して接続されてい
るので、前記（イ）式の分母は、近似的に電界検出部１
自身の静電容量CAと考えてよい。ところが、CA＜＜CLの
関係があるので、電界検出部１に誘起される電圧が大き
くなり、駆動回路部３を動作させるのに必要な電圧が容
易に得られる。それ故、電界検出部１の大きさを従来の
電界検出部１の面積よりも小さくすることが可能で、結
局、本発明の課電表示器10は小形化も可能である。The AC / DC converter 2 is a component necessary as a DC power source of the drive circuit unit 3 described above, and also has an effective operation described below. Sixth conventional voltage application display 9 shown in FIG. As shown by the above-described (a) equation, to ground voltage V O V O × (C O
A voltage V L having a magnitude of / C L ) was induced in the electric field detector 1.
In this case, since the liquid crystal display element 4 having a large electrostatic capacity was directly connected to the electric field detection unit 1, the denominator of the equation (a) was C L, and the voltage induced in the electric field detection unit 1 was Was very small. Since the electric field detection unit 1 and the liquid crystal display element 4 of the present invention are connected via the AC / DC conversion unit 2 and the drive circuit unit 3, the denominator of the above equation (A) is approximately the electric field detection unit 1
It can be thought of as its own capacitance C A. However, because of the relationship of C A << C L, the voltage induced in the electric field detection unit 1 becomes large, and the voltage required to operate the drive circuit unit 3 can be easily obtained. Therefore, the size of the electric field detection unit 1 can be made smaller than the area of the conventional electric field detection unit 1, and in the end, the charging indicator 10 of the present invention can be downsized.
「実施例」 本発明の課電表示器10の一実施例を第２図に示す。図中
11および12は電界検出部１を構成する集電板で、間隔ｌ
を離して設置されている。図示せざる機器や導体の高圧
部からの静電誘導で２枚の集電板11、12間に交流電圧が
誘起する。この誘起した交流の電圧をダイオード21で半
波整流しコンデンサ23を充電する。22はツェナーダイオ
ードで、正方向に必要以上の入力が入った時の抑制用で
あり、コンデンサ23の両端電圧を安定化する作用がある
と共に逆方向電圧はパスさせ、後述の分周回路31に負電
圧が印加されるのを防ぐ。本実施例ではダイオード21、
コンデンサ23、ツェナーダイオード22で交直変換部２を
構成する。また、本実施例では分周回路31が駆動回路部
３に相当する。ａ、ｂは分周回路の電源端子、ｃはツェ
ナーダイオード22の両端に発生する半波を信号として入
力する信号入力端子である。ｄ、ｅはｃより入力された
信号のそれぞれ2n分の１、2n+1分の１の分周出力の出力
端子であり、液晶表示素子４の液晶40を挟んで相対する
２つの透明電極の端子ｇ、ｈに接続されている。"Embodiment" FIG. 2 shows an embodiment of the charge indicator 10 of the present invention. In the figure
Numerals 11 and 12 are current collecting plates constituting the electric field detecting section 1, and the distance l
Are installed apart from each other. An AC voltage is induced between the two current collector plates 11 and 12 by electrostatic induction from a high voltage portion of a device or conductor (not shown). The induced alternating voltage is half-wave rectified by the diode 21 to charge the capacitor 23. Reference numeral 22 is a Zener diode, which is for suppressing when an input more than necessary is input in the positive direction, has the function of stabilizing the voltage across the capacitor 23, and allows the reverse voltage to pass to the divider circuit 31 described later. Prevents negative voltage from being applied. In this embodiment, the diode 21,
The capacitor 23 and the Zener diode 22 constitute the AC / DC converter 2. Further, in the present embodiment, the frequency dividing circuit 31 corresponds to the drive circuit unit 3. Reference numerals a and b are power supply terminals of the frequency dividing circuit, and reference numeral c is a signal input terminal for inputting a half wave generated at both ends of the Zener diode 22 as a signal. d and e are output terminals for dividing the signals input from c by 1 / 2n and 2n + 1 , respectively, and are two transparent electrodes facing each other with the liquid crystal 40 of the liquid crystal display element 4 interposed therebetween. It is connected to the terminals g and h of the electrodes.
第３図は第２図のｄ、ｅ端子の出力電圧波形と液晶表示
素子４への駆動電圧波形を示す。前記駆動電圧波形は第
２図のｄ端子を基準とし液晶表示素子４の２つの端子
ｇ、ｈ間の差電圧を示したものであり、t1期間は正電
圧、t2期間は負電圧、期間TON＝t1＋t2が表示期間、期
間TOFF＝t3＋t4が表示休止期間、Ｔ＝TON＋TOFFが周期
である。FIG. 3 shows the output voltage waveforms at the terminals d and e and the drive voltage waveform to the liquid crystal display element 4 in FIG. The drive voltage waveform shows the difference voltage between the two terminals g and h of the liquid crystal display element 4 with reference to the d terminal of FIG. 2, where t 1 period is a positive voltage and t 2 period is a negative voltage. The period T ON = t 1 + t 2 is the display period, the period T OFF = t 3 + t 4 is the display pause period, and T = T ON + T OFF is the period.
第２図のように構成した各部分を120×55×10の大きさ
のプラスチックケースに収めて課電表示器10とし、この
課電表示器10を第４図のように設置した母線導体５に取
り付けて試験した。図中、６は接地架台、７は支持がい
しである。なお、課電表示器10の構成各部分の諸元は以
下の通りであった。The parts configured as shown in FIG. 2 are housed in a plastic case with a size of 120 × 55 × 10 to form a charge indicator 10, and the charge indicator 10 is installed as shown in FIG. It was attached to and tested. In the figure, 6 is a grounding stand, and 7 is a supporting insulator. The specifications of each component of the charge indicator 10 are as follows.
集電板の大きさ 50mm×100mm 集電板間の距離ｌ 4mm 周期Ｔ 60分の32秒 液晶表示素子 表示面積３cm2、静電容量2.6nF しきい値電圧 約3V その結果、この課電表示器10は印加電圧1.5kVで明瞭に
点滅表示した。従来方式の課電表示器では前記液晶表示
素子４を表示させるのに約11kVの電圧印加が必要であ
り、この実施例によって本発明の有効性がわかる。Size of collector plate 50mm × 100mm Distance between collector plates l 4mm Cycle T 32/60 seconds Liquid crystal display device Display area 3cm 2 , Capacitance 2.6nF Threshold voltage about 3V The device 10 clearly blinked at an applied voltage of 1.5 kV. In the conventional charging display, it is necessary to apply a voltage of about 11 kV to display the liquid crystal display element 4, and this example shows the effectiveness of the present invention.
前記実施例では、交直変換部２を半波整流回路で示した
が、全波整流回路、倍電圧整流回路等公知の整流回路を
使うこともできる。In the above embodiment, the AC / DC converter 2 is shown as a half-wave rectifier circuit, but a known rectifier circuit such as a full-wave rectifier circuit or a voltage doubler rectifier circuit may be used.
「発明の効果」 課電表示器に本発明の交直変換部と駆動回路部を設けた
ことにより、静電誘導で発生する電気的エネルギーのみ
で、3kV〜6kV程度の交流電圧において、表示パターン面
積３〜５cm2の大きな液晶表示素子を点滅動作させるこ
とが可能となり、課電表示器の注意喚起力を大幅に向上
させることができるので、高圧設備の保守・点検作業の
安全性をより高めることができる。"Effect of the invention" By providing the AC-DC converter and the drive circuit unit of the present invention in the voltage display, only the electric energy generated by the electrostatic induction, in the AC voltage of about 3kV ~ 6kV, the display pattern area A large liquid crystal display element of 3 to 5 cm 2 can be turned on and off, and the alertness of the electricity display can be greatly improved. Therefore, the safety of maintenance and inspection work of high-voltage equipment can be further improved. You can
第１図は本発明の課電表示器の構成を示すブロック図、
第２図は本発明の１実施例を示すための図、第３図は第
２図の実施例における液晶表示素子の駆動電圧波形を示
す図、第４図は前記実施例の課電表示器の試験状況を示
す図、第５図は本発明の必須要件を構成する駆動電圧波
形を説明するための図、第６図は従来の課電表示器の構
成と原理を説明するための図である。 図において １は電界検出部 ２は交直変換部 ３は駆動回路部 ４は液晶表示素子 ９は従来の課電表示器 10は本発明の課電表示器 である。FIG. 1 is a block diagram showing the configuration of a charging indicator according to the present invention,
FIG. 2 is a diagram showing one embodiment of the present invention, FIG. 3 is a diagram showing drive voltage waveforms of the liquid crystal display element in the embodiment of FIG. 2, and FIG. FIG. 5 is a diagram for explaining a driving voltage waveform that constitutes an essential requirement of the present invention, and FIG. 6 is a diagram for explaining a configuration and a principle of a conventional electric charge indicator. is there. In the figure, 1 is an electric field detection unit 2, 2 is an AC-DC conversion unit, 3 is a drive circuit unit, 4 is a liquid crystal display element, 9 is a conventional voltage-applying indicator, and 10 is a voltage-applying indicator according to the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 松吉 愛知県西春日井郡西枇把島町芳野町３丁目 １番地 株式会社高岳製作所名古屋事業所 内 審査官 樋口 信宏 (56)参考文献 特開 昭61−221667（ＪＰ，Ａ) 実開 昭51−40371（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Matsukichi, Matsuyoshi, Aichi Prefecture, Nishi-Kasugai-gun, Nishibikijima-cho, Yoshino-cho, 3-chome No. 1 Takahashi Manufacturing Co., Ltd. Nagoya Works, Nobuhiro Higuchi (56) References JP 61- 221667 (JP, A) Actually open 51-40371 (JP, U)
Claims (1)
器や導体に交流の電圧が印加されていることを表示する
課電表示器において、前記電界検出部の出力を整流して
後段に駆動電源とクロック信号を供給する交直変換部
と、前記交直変換部からのクロック信号を分周する分周
回路および、この分周回路の出力である時間平均的にみ
て電源周波数より低周波の駆動電圧波形を液晶表示素子
に印加するための駆動回路部とを備え、電気機器や導体
が課電状態となった場合に、液晶表示素子を点滅表示さ
せることを特徴とした課電表示器。1. An electric charge indicator that uses an electric field detector and a liquid crystal display element to indicate that an AC voltage is being applied to an electric device or conductor, and rectifies the output of the electric field detector to a subsequent stage. An AC / DC converter for supplying a driving power supply and a clock signal, a frequency divider circuit for frequency-dividing the clock signal from the AC / DC converter, and a drive of a frequency lower than the power supply frequency as an average of the output of the frequency divider circuit. A voltage application display comprising a drive circuit unit for applying a voltage waveform to a liquid crystal display element, and causing the liquid crystal display element to blink when an electric device or a conductor is in a voltage application state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61272873A JPH0679041B2 (en) | 1986-11-18 | 1986-11-18 | Charge indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61272873A JPH0679041B2 (en) | 1986-11-18 | 1986-11-18 | Charge indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63128268A JPS63128268A (en) | 1988-05-31 |
| JPH0679041B2 true JPH0679041B2 (en) | 1994-10-05 |
Family
ID=17519951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61272873A Expired - Fee Related JPH0679041B2 (en) | 1986-11-18 | 1986-11-18 | Charge indicator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679041B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03125272U (en) * | 1990-03-30 | 1991-12-18 | ||
| FR2685487B1 (en) * | 1991-12-20 | 1994-09-16 | Cit Alcatel | DEVICE FOR EVALUATING THE VOLTAGE PROVIDED BY A VOLTAGE SOURCE. |
| WO2016189863A1 (en) * | 2015-05-24 | 2016-12-01 | 株式会社Ｗａｖｅ Ｅｎｅｒｇｙ | Electricity detector using afterglow |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59161075U (en) * | 1983-04-14 | 1984-10-29 | 富士電機株式会社 | Voltage detection device |
-
1986
- 1986-11-18 JP JP61272873A patent/JPH0679041B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63128268A (en) | 1988-05-31 |
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