JP2891288B2 - Memory type recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory type recorder and a memo equipped with a terminal jig which are used for maintenance of distribution lines.
The present invention relates to a re-recording device .

[0002]

2. Description of the Related Art Electric power companies regularly measure voltage and current at predetermined fixed points on distribution lines for maintenance and management of distribution lines. The measurement of the voltage and current of the distribution line is performed in the following manner on the low-voltage distribution line that is stepped down from the high-voltage distribution line of the telephone pole by a pole transformer.

[0003] For example, a low-voltage distribution line, which is stepped down from a high-voltage distribution line to a voltage of 100 to 200 V by a pole transformer, is installed on a plurality of electric poles, and is finally drawn into a power consumer such as a general home by a service line. Supply is taking place. In the power consumer, a watt-hour meter connected to the service line is installed at a predetermined place in a house, and the watt-hour meter measures the amount of power consumption.

[0004] By the way, as described above, the electric power company needs to measure the voltage and current at predetermined power consumers and at a plurality of predetermined fixed points on the low-voltage distribution line due to the necessity of maintenance management of the distribution line. It is run on a regular basis.

More specifically, the periodic voltage / current measurement is performed in the following manner. That is, in the case of a watt hour meter at a power consumer, a clip-shaped terminal jig is attached to a terminal portion of the watt hour meter, and at a fixed point on a low voltage distribution line, the low voltage distribution line In addition, by attaching a terminal jig different from the above that bites into the covering material and comes into contact with the core wire, the voltage / current is measured by a voltage / current recorder connected to the terminal jig, and the measured value is measured. Is recorded on a recording paper built in the voltage / current recorder.

[0006] When the above-described voltage / current measurement is completed, an operator goes to each fixed point of the electric power consumer and the low-voltage distribution line, takes out the recording paper of each recorder, takes it back to the office of the electric power company, and takes it to the recording paper. The recorded data is read, organized, key-input to a computer, and processed by a computer to create a report.

[0007] In addition to the above-described method of recording data on recording paper, there is also a means for recording a measurement value obtained by a voltage / current recorder on an IC card.
Bring the C card back to the power company's sales office and the IC
The data recorded on the card is read by a reading device, and a computer creates a report based on the read data by performing arithmetic processing.

[0008]

By the way, the above-mentioned voltage / current measurement of the low-voltage distribution line is usually performed at a regular rate such as once a month, but it is used for one measurement task. There are many voltage and current recorders that can be used, such as taking out recording paper from all the recorders, reading and organizing the data recorded on each recording paper, and inputting a huge amount of such data into a computer. At present, much effort and time was spent in preparing the final report. In addition, the voltage / current recorder for recording data on the recording paper and the IC card is large in size, and there is a problem that handling of the voltage / current recorder is inconvenient in transporting and installing.

[0009] When measuring the voltage and current of a watt-hour meter at a power consumer, an electrical connection between the watt-hour meter and a terminal portion is made by connecting a clip-shaped terminal jig to the terminal portion. However, there is a problem that the clip-shaped terminal jig is easily detached and may be short-circuited.

Accordingly, the present invention has been proposed in view of the above problems, and an object of the present invention is to provide a compact memory recorder which can easily and quickly process data obtained by voltage / current measurement. When, a terminal fixture that can simplify the connection with the terminal portion when the voltage and current measurements at the power meter
An object of the present invention is to provide a memory-type recording device provided with the same.

[0011]

As a technical means for achieving the above object, a memory type recording apparatus according to the present invention is connected to a low voltage distribution line which is stepped down from an outdoor high voltage distribution line or to the low voltage distribution line. power consumers of electricity meter noise
Perform voltage and current measurements on these and record the measured values
A control circuit for A / D-converting the voltage / current detected from the low-voltage distribution line and calculating and processing the effective value of the A / D-converted measured voltage / current. And a data storage circuit for storing and holding, as measurement data, an average value for each predetermined time based on an effective value obtained by an effective value calculation in the control circuit, and a maximum value and a minimum value within a predetermined period as measurement data. Memory recorder that is built in a small housing that can be stored in the memory and serially outputs the measurement data at an arbitrary time
And detachably screwed to the terminal part of the watt-hour meter
Opposition between the insulating base plate and the terminal portion of the base plate
Projected contact that is mounted on the surface and elastically contacts the terminal at the tip
A point is formed and a trailing edge extends from the memory recorder.
Connected to the tip of the lead wire and derived from the base plate
A terminal jig comprising a leaf spring-shaped conductive lead plate .

[0012]

The insulating base plate has a position variable structure capable of adjusting a screwing position on a terminal of the watt-hour meter. The specific structure thereof is a small-diameter shaft portion extending from the head and an upper portion thereof. It consists of an oval-shaped insertion hole into which a screw consisting of a large-diameter shaft part lower part with a male screw engraved extending from the upper part of the shaft part is inserted, and the insertion hole has a large-diameter part on its upper part, and A small-diameter portion is formed at the lower portion to provide a step, and one end of the small-diameter portion has a screw portion having a female screw slightly larger in diameter than the small-diameter portion. Further, the insertion hole may be formed in a rotatable disk-shaped block body held in a state where the hole is formed in a predetermined position in the base plate and the position thereof is regulated in the vertical direction.

[0014]

In the memory type recording apparatus according to the present invention, the control circuit calculates the effective value of the measured voltage and current, and the measurement data based on the calculated effective value is stored and held in the data storage circuit.
Memory for serially outputting the measurement data at an arbitrary time
The compact recorder can be stored in the watt hour meter.
A portable device can be realized in a portable manner, and the measurement data can be analyzed or printed immediately by connecting to a personal computer or a printer as required.

In the memory-type recording apparatus according to the present invention, a conductive lead plate having a protruding contact is provided at the end of a lead wire extending from the memory-type recorder at the time of measurement with a watt hour meter of a power consumer. Consisting of an attached insulating base plate
By providing the terminal jig, the terminal jig can be easily and securely attached to the terminal portion of the watt-hour meter, and the connection of the memory recorder can be easily performed via the terminal jig.

Further, if a position variable structure is provided on the insulating base plate, when the terminal jig is attached to the terminal portion of the watt-hour meter, the terminal jig is used corresponding to different terminal portions depending on the type of the watt-hour meter. It is possible to do.

[0017]

FIG. 1 shows an embodiment of a memory recorder according to the present invention.
13 to FIG.

A memory type recorder 1 in the embodiment shown in FIG. 1 is connected to an input terminal 2 of a voltage / current stepped down from an outdoor high voltage distribution line, and a rectifier circuit 3 for removing noise from the measured voltage / current. And the measured voltage / current is A
A control circuit 4 for performing A / D conversion and calculating the effective value of the A / D-converted measured voltage / current [for example, a one-chip CP
U] and an average value every predetermined time [for example, 0.5 seconds] based on the effective value calculation in the control circuit 4, and a maximum value and a minimum value within a predetermined period [for example, 24 hours] are stored as measurement data. And a data storage circuit 5 for holding.

The control circuit 4 includes an A / D converter 6 for A / D converting the measured voltage / current output from the rectifier circuit 3 and a program for calculating the effective value of the measured voltage or voltage. It has a ROM 7 written in advance and a RAM 8 for temporarily storing measurement data and the like, and is connected to an interface circuit 9 for serially outputting the measurement data at an arbitrary time.

The control circuit 4 includes, as described above, a clock circuit 10 for counting the time required to obtain an average value, a maximum value, and a minimum value of the effective values as measurement data; Is connected to a display unit 11 such as a liquid crystal or the like for displaying an image, and a key operation unit 12 for inputting a key to start recording, switch a display, set a time, set a measurement place, or the like for voltage / current measurement. In the figure, reference numeral 13 denotes a power supply circuit provided before the rectifier circuit 3, and reference numeral 14 denotes an output terminal to which the interface circuit 9 is connected.

FIG. 2A shows a memory type recorder 1 of the present invention.
As shown in (b), the above-described constituent circuit is built in a small housing 15, and a display unit 1 such as a liquid crystal is provided on the front surface of the housing.
1 and a key operation section 12 such as a push button are arranged, and input / output terminals 2 and 14 are arranged on a side surface of the housing.

When the voltage and current of the low-voltage distribution line are measured by using the memory recorder 1, when the measurement is applied to a watt-hour meter of a power consumer connected to the low-voltage distribution line,
A terminal jig having the following structure is used.

This terminal jig 16 is shown in FIGS.
As shown in FIG. 7, an insulating base plate 17 made of transparent plastic or the like which is easily and detachably screwed to the terminal portion of the watt-hour meter.
And a protruding contact 18 which is attached to a surface of the base plate 17 facing the terminal portion, and which has a protruding contact 18 elastically contacting the terminal portion at the front end, and a lead wire 1 extending from the memory recorder 1 at the rear end.
9 is connected to the base plate 17 and is formed of a leaf spring-like conductive lead plate 20.

Specifically, on the surface of the base plate 17 facing the terminal portion, the groove 2 is formed at a position corresponding to the terminal plate of the terminal portion.
1 is engraved, and the base end of the lead plate 20 is screwed in a state where the lead plate 20 is housed in the groove 21. The lead plate 20 is a leaf spring having a shape inclined toward the terminal portion from the base end portion toward the tip end portion, and a protruding contact 18 elastically contacting the terminal plate of the terminal portion at the tip end. It is formed. A lead wire 19 extending from the memory recorder 1 is connected to the rear end of the lead
Is derived from

In the case shown in the figure, an insertion hole 2 for screwing to the terminal of the watt-hour meter is provided substantially at the center of the base plate 17.
2, the terminal jig 16 of the present invention is formed with insertion holes 23 and 24 at the corners of the base plate 17 so that it can be screwed in conformity with various watt-hour meters. For example, the insertion hole 24 has a position variable structure that adjusts a screwing position so as to be adaptable to various watthour meters.

Specifically, as an example of the position variable structure, for example, as shown in FIGS. 4 (a) to 4 (d), an oval insertion hole 24 is provided. The insertion hole 24 has an oval shape along the longitudinal direction or the short direction (the longitudinal direction in the figure) of the base plate 17 as shown in FIG. The step 27 is formed by making the diameter part 25 and the lower part a small diameter part 26.
6 has a structure in which a screw portion 28 is formed at one end with a female screw having a slightly larger diameter.

On the other hand, as shown in FIGS. 4 (e) and 4 (f), the screw 29 has a shaft portion upper portion 31 extending from the head 30 and the insertion hole 24.
The shaft portion lower part 32 has a diameter slightly larger than the small diameter portion 26 of the insertion hole 24 and has a structure in which a male screw is engraved. This screw 2
9 is screwed into a screw portion 28 at one end of the small diameter portion of the insertion hole 24 and advanced downward as shown in FIG. And screw 2
When the lower shaft portion 32 of the screw 9 passes through the screw portion 28 of the insertion hole 24, the screwed state is released, and when the screw 29 is moved in the lateral direction, the head 30 of the screw 29 is engaged with the step 27. The screw 29 can be stopped to prevent the screw 29 from dropping downward, and conversely, the lower shaft portion 32 of the screw 29 can be locked by the bottom surface of the base plate 17 to prevent the screw 29 from dropping upward.

In this manner, the screw 29 is used as a combination with the terminal jig 16, and the position of the screw 29 is adjusted along the longitudinal direction of the small diameter portion 26 of the insertion hole 24 as shown by the solid line arrow in FIG. It is possible to select the optimal screwing position according to the terminal part according to the type of watt hour meter, and to position the screw 29 at that position, and the shaft part of the screw 29 at that position The lower part 32 can be fixed by screwing it into the screw hole of the terminal part.

Further, as another example of the position variable structure, there is a structure as shown in FIGS. 5A and 5B. In the above-described device shown in FIG. 4, the position adjustment direction is one direction, but in this example, the position can be adjusted in any direction.

As shown in FIG. 1, a relatively large hole 33 is formed at a corner or the like of the base plate 17, and a disk-shaped block 34 is rotatably fitted into the hole 33. .
The block body 34 has a concave groove 35 formed along the side peripheral surface, and a ring-shaped protrusion 36 that fits into the concave groove 35 is formed in the hole 33, thereby preventing the block body 34 from falling off in the vertical direction. It has a structure, and an insertion hole 24 having the above-described structure is formed in a central portion thereof. In addition, the same reference numerals as those in the above-mentioned case are given to the through holes 24, and the repeated description is omitted. The screws 29 mounted in the through holes 24 are also the same, so that they are not shown.

In this position variable structure, the position can be adjusted along the longitudinal direction of the insertion hole 22 of the block body 34, and the block body 34 can be rotated as shown by the solid line arrow in FIG. Therefore, when an optimum screwing position is selected according to the type of the watt hour meter in accordance with the type of the terminal and the screw 29 is positioned at that position, the position can be adjusted in any direction.

The procedure for executing the voltage / current measurement by the memory type recorder 1 using the terminal jig 16 having the above-mentioned structure for the watt hour meter of the power consumer is as follows.

First, as shown in FIGS. 6A and 6B, the operation of attaching the terminal jig 16 to the terminal portion 38 of the wattmeter 37 is started. In this work, after removing the front cover 39 of the watt-hour meter 37, the cover 40 of the terminal portion 38 is removed, and a screw hole 41 for fixing the cover is removed as shown in FIGS. The base plate 17 of the terminal jig 16 is screwed using this. As shown in FIG. 8, by fixing the base plate 17, the protruding contacts 18 at the tip of the lead plate 20 elastically contact the respective terminal plates 42 of the terminal portions 38 of the watt-hour meter 37 to perform reliable connection. It is.

After the terminal jig 16 is attached, FIG.
(A) As shown in (b), the distal end of a lead wire 19 extending from the rear end of the lead plate 20 is connected to the input terminal 2 on the side surface of the housing of the memory type recorder 1, and then the memory type recorder 1 is connected. It is stored in the watt hour meter 37. In this state, the voltage / current measurement by the memory recorder 1 is executed.

In the memory type recorder 1, after the measured voltage and current obtained from the input terminal 2 are subjected to noise removal by the rectifier circuit 3, the A / D converter 6 of the control circuit 4 as shown in FIG. A / D conversion is performed, and the effective value of the A / D converted measured voltage / current is calculated. An average value is calculated by averaging the effective values obtained by this arithmetic processing every predetermined time (for example, 0.5 seconds), and the maximum value and the minimum value of the effective values within a predetermined period (for example, 24 hours) are calculated. Is determined. The determination of the maximum value and the minimum value is performed by determining whether the effective value at a certain time is the maximum value or the minimum value, and rewriting the data and time if the effective value is not the maximum value or the minimum value, and rewriting the maximum value or the minimum value. When the minimum value is reached, the data and the time are stored and held in the data storage circuit as measurement data together with the average value of the effective values described above.

Prior to executing the voltage / current measurement by the memory recorder 1, the recording operation, display switching, time setting and measurement location are performed by the key operation unit 12 on the front surface of the housing of the memory recorder 1. Various conditions, such as setting, are input by key in advance.

When the voltage / current measurement by the memory recorder 1 is completed as described above, the worker goes to the power consumer, removes the memory recorder 1 and the terminal jig 16 from the wattmeter 37, and The measurement data stored in the memory type recorder 1 is processed by returning to a business office of the company. The processing of the measurement data is performed by the output terminal 1 on the side surface of the housing of the memory recorder 1 as shown in FIGS.
4 is connected to a printer 43 or a personal computer 44, data analysis or data printing can be performed based on measurement data serially output from the memory recorder 1.

In the above description, the watt hour meter 37 of the power consumer
Although the voltage and current measurement in the above description has been described, it is also possible to execute the measurement in an outdoor low-voltage distribution line.

In this case, the connection to the low-voltage distribution line is shown in FIG.
A terminal jig 45 as shown in FIG. This terminal jig 45 is formed by forming a circular blade 49 at the tip of a screw part 48 which is screwed so as to be able to protrude and retreat from a tip concave part 47 of a hook-shaped main body 46 having an insulating property as shown in FIG. By rotating the rear end portion 50 of the main body, the screw portion 48 projects and retracts. The lead wire 1 is
9 are electrically connected and are led out from the rear end 50 of the main body. On the other hand, in order to use the memory recorder 1 outdoors,
The memory type recorder 1 is used in a state where an outdoor case 51 as shown in FIG.

As shown in FIG. 14, the memory type recorder 1 is housed in an outdoor case 51 and is connected to the input terminal 2 on the side surface of the housing of the memory type recorder 1 and led out from the case 51. Is connected to the low voltage distribution line 52. That is, the terminal jig 45
The low-voltage distribution line 52 is fitted into the front end concave portion 47 of the main body 46 of the main body 46, and the rear end 50 of the main body is rotated, so that the screw portion 4 is formed.
8 is advanced, and the circular blade 49 at the tip of the screw portion 48 is moved.
Is cut into the insulating coating portion 53 of the low-voltage distribution line 52, and the circular blade 49 is brought into contact with the core wire 54 in the insulating coating portion 53 (see FIG. 12). As a result, the low-voltage distribution line 52 and the lead wire 19 are electrically connected to each other, and the low-voltage distribution line 52 is held by the end of the terminal jig 45 by the memory recorder 1. The voltage measurement is performed in the same manner as described above (in the case of watt hour meter 37).
For current measurement, separate from the voltage measurement described above.
Although not shown, without using the jig 45, low-voltage power distribution
Connect a clamp-type instrument current transformer (CT) to the line 52
It is done by doing. Also, after the end of the voltage / current measurement, the processing of the measurement data obtained by the memory type recorder 1 is performed as in the case described above.

[0041]

According to the present invention, a memory for serially outputting measurement data obtained by voltage / current measurement at an arbitrary time
Since the recorder can be housed in the watt-hour meter, the measurement data can be analyzed or printed immediately by connecting it to a personal computer or a printer if necessary. This eliminates the task of reading and organizing the data recorded on the recording paper and inputting such a large amount of data to a computer as in the past, thus improving the workability until the final report is created. Since it is possible to provide a compact and portable recorder that does not use recording paper or an IC card, the handling becomes very convenient in the transportation and installation work.

In the measurement by a watt hour meter of a power consumer, a terminal jig made of an insulating base plate having a conductive lead plate having a protruding contact is used, so that the terminal jig can be used. It can be easily and reliably attached to the terminal portion of the watt-hour meter, and the electrical connection of the memory recorder can be easily made via this terminal jig.

Further, by providing the insulating base plate with the position variable structure, when the terminal jig is attached to the terminal portion of the watt-hour meter, the type of the watt-hour meter can be quickly adapted to greatly increase versatility. To improve.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing an embodiment of a memory recorder according to the present invention.

FIG. 2A is a front view showing the appearance of a memory recorder.
(B) is the side view

FIG. 3A is a plan view showing an example of a terminal jig, and FIG.
Is a bottom view thereof, (c) is a sectional view taken along line AA of (b), and (d) is a sectional view taken along line BB of (a).

4A is a partial plan view showing an example of a position variable structure of a through hole of a terminal jig, FIG. 4B is a cross-sectional view taken along line CC of FIG. 4A, and FIG. Sectional view along the line DD
(D) is a cross-sectional view taken along line EE of (a), (e) is a cross-sectional view showing a state where a screw is mounted in (b), and (f) is a state where a screw is mounted in (d). Sectional view

FIG. 5A is a partial plan view showing another example of the structure for changing the position of the insertion hole of the terminal jig, FIG. 5B is a sectional view taken along line FF of FIG. 5A, and FIG. Partial plan view showing the state where the block body is rotated in)

6A is a front view showing a state in which a front cover of the watt hour meter is removed, and FIG. 6B is a side view of FIG.

7A is a front view showing a state in which a terminal jig is attached to a watt hour meter, and FIG. 7B is a side view of FIG.

FIG. 8 is an enlarged sectional view of a main part showing a state where a terminal jig is attached to a terminal part of the watt hour meter.

9A is a front view showing a state in which a terminal jig and a memory type recorder are attached to the watt hour meter, and FIG. 9B is a side view of FIG.

FIG. 10 is a flowchart for executing voltage / current measurement by a memory recorder.

11A is a schematic configuration diagram showing a state in which a memory recorder is connected to a printer, and FIG. 11B is a schematic configuration diagram showing a state in which a memory recorder is connected to a personal computer.

FIG. 12 is a perspective view showing another example of the terminal jig.

FIG. 13 is a perspective view showing an outdoor case used when performing voltage / current measurement with a memory recorder outdoors.

FIG. 14 is a perspective view showing a state where the terminal jig of FIG. 12 is connected to the memory recorder of the outdoor case of FIG. 13;

[Explanation of symbols]

 Reference Signs List 4 control circuit 5 data storage circuit 15 housing 16 terminal jig 17 base plate 18 projecting contact 19 lead wire 20 conductive lead plate 24 insertion hole 25 large diameter portion 26 small diameter portion 27 step 28 screw portion 29 screw 30 head 30 shaft Upper part 32 Lower shaft part 33 Hole 34 Block body 37 Watt hour meter 38 Terminal part 52 Low voltage distribution line

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhito Shibata 89 Shinmeicho, Toyohashi City, Aichi Prefecture Inside the Toyohashi Sales Office of Chubu Electric Power Company (72) Inventor Katsuyuki Takagi 2-43 Kamiida Kitamachi, Kita-ku, Nagoya City, Aichi Prefecture (72 ) Inventor Masamichi Takada 4-2-64 Yamatedai, Ibaraki-shi, Osaka (56) References JP-A-61-221677 (JP, A) JP-A-56-101299 (JP, A) JP-A-55-94163 (JP) JP, A) Japanese Utility Model Showa 64-46760 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01R 11/00, 11/02, 11/04 G01R 22/00

Claims (4)

(57) [Claims] 1. A voltage / current measurement is performed on either a low-voltage distribution line stepped down from an outdoor high-voltage distribution line or a watt hour meter of a power consumer connected to the low-voltage distribution line.
A control circuit for recording the measured value, A / D-converting the voltage / current detected from the low-voltage distribution line, and calculating and processing the effective value of the A / D-converted measured voltage / current; Average value for each predetermined time based on the effective value obtained by the effective value calculation in the control circuit,
A data storage circuit for storing and holding a maximum value and a minimum value within a predetermined period as measurement data in a small housing capable of being stored in a watt hour meter, and a memory type recording for serially outputting the measurement data at an arbitrary time And an insulation that is detachably screwed to the terminal of the watt-hour meter
Base plate and a surface of the base plate facing the terminal portion.
A protruding contact that is attached and elastically contacts the terminal at the tip
Lead formed and extending from the memory recorder at the rear end
A plate bar connected to the end of the wire and derived from the base plate
A memory type recording device comprising: a terminal jig made of a thread-shaped conductive lead plate . 2. The memory-type recording apparatus according to claim 1, wherein the insulating base plate has a position variable structure capable of adjusting a position at which the terminal is screwed to a terminal of the watt-hour meter. 3. The position variable structure has a length into which a screw including a small-diameter shaft upper portion extending from the head portion and a large-diameter shaft lower portion having an external thread and extending from the shaft upper portion is inserted. It consists of a circular insertion hole, and the insertion hole has a large diameter part on its upper part,
3. The memory-type recording apparatus according to claim 2, wherein a small diameter portion is formed at a lower portion to provide a step, and one end of the small diameter portion has a screw portion having a female screw slightly larger in diameter than the small diameter portion. apparatus. 4. The rotatable disk-shaped block body, wherein the insertion hole is held in a state where the position of the insertion hole is regulated in a vertical direction by a hole formed in a predetermined position of a base plate. The memory-type recording device according to claim 3.