JPS59180697A - Luminous pulse transmitter - 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] [Technical Field of the Invention] The present invention provides a light emitting pulse that converts a supplied electrical signal into a pulse output and outputs this pulse output as a light emitting pulse to the outside in an electrically insulated state. Regarding a transmitting device.

[Technical background of the invention and its problems]

The light emitting pulse transmitter converts a supplied electrical signal into a pulse output using a pulse generator, drives a light emitting element with the pulse output, and outputs a light emitting pulse. The output light emission pulses are transmitted to an external light receiver in a weakly electrically insulated state, and are used as an information transmission medium between devices.

For this reason, this device is widely used as an effective means of intrinsically safe explosion-proof measures and electrical insulation of devices.Since it uses light emission as a pulsed output, it can monitor the operating status of the device day and night. It can also be sufficiently monitored by the blinking state of the light emitting pulse. Furthermore, with one light receiver, it is possible to collect information from these transmitting devices installed at various locations and to check the operation of each Ka.

When collecting the output from the light emitting pulse transmitter with a light receiver, the important issue is to irradiate the light emitting element with high efficiency while always maintaining a constant level of light from the light emitting element to the light receiving element of the light receiver. It may eliminate the effects of data loss and noise during information exchange.

To this end, it is necessary to position the light-emitting element and the light-receiving element sufficiently so that their facing area is maximized, and to sufficiently shield them from each other in order to eliminate the influence of light leakage and disturbance light.

However, in the conventional positioning method, there was no way to guide the light-receiving element of the light receiver to the light-emitting element so that both were always sufficiently positioned, and it was difficult to determine whether the light-receiving element was sufficiently positioned by visual measurement or when the received light amount display on the receiver was at its maximum. It was regarded as For this reason, the amount of light received by the light receiver, that is, the relative area of the light emitting element and the light receiving element, changes each time the light receiver is removed.For example, when checking the status of scattered devices, etc. Each device could not always be managed under constant conditions. Another disadvantage is that time is wasted in adjusting and aligning the light receiver so that the displayed value of the amount of light received by the light receiver is maximized. .

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a light emitting pulse transmitting device in which a light emitting element and a light receiving element can be easily positioned in the same state at all times, and in which signal transmission can be carried out efficiently. be.

[Summary of the invention]

In this invention, a guide part is provided in the housing to guide the light receiver so that the light receiving element of the light receiver that receives the light emitting pulse is always placed facing the light emitting element protruding from the front surface of the housing. It was formed.

[Embodiments of the invention]

This invention will be explained using one embodiment with reference to the drawings. In this embodiment, an example of an electronic tortoise dynamometer will be explained as the light emission pulse transmitting device.

FIG. 1 is a block diagram showing the configuration of a pulse generator 10 of an electronic dynamometer according to this embodiment. In the figure,
11 is an auxiliary transformer, and 12 is an auxiliary current transformer. The auxiliary transformer 11 inputs the load voltage V, and the auxiliary current transformer 12 inputs the load current ■, converts them into low level signals, and outputs them to the multiplier 13. This multiplier 13 converts the voltage into a voltage proportional to the product of the output signal from the auxiliary transformer 11 and the output signal from the auxiliary current transformer 12 and outputs it to the integrator 14 . Integrator 14
converts this output voltage into a pulse with a frequency proportional to this and outputs it to the branching unit 15. Then, the frequency divider 15 divides the pulse output, and the count display unit 16 displays the obtained nine-frequency division number in accordance with the display unit.

Also, the light emitting diode 17, which is a light emitting element, is connected to the branching unit 15.
It is connected to the input section of 1. It is driven and emits light according to the pulse output from the integrator 14.

Next, FIG. 2 is an external view of a casing 20 housing such a pulse generator 10, in which (a) is a front view and (b) is a side view. Reference numeral 20 denotes a casing of the panel-mounted Michiko type watt-hour meter, which is composed of a casing main body part 21 and a frame part 22 attached so as to surround the side surface of the front part of this main body part.
A terminal section 23 is provided on the back surface of the main body section 21 of the casing.
0 is supplied with a load'voltage (2) and a load current (2). 'The display window 24 of the count display section 16 is still on the front of the main body section 21 of the casing.
is formed, and a light emitting portion 17a of a light emitting diode 17 is disposed protruding from the center of the front surface.

The frame portion 22 has guide portions 3o formed on both outer side surfaces that intersect with a straight line passing through the light emitting portion 17a. The guide portion 30 is a groove formed with a predetermined width around the straight line. That is, this groove extends in a direction orthogonal to the front surface of the housing 20 and is bored on both side surfaces of the frame portion 22.

An external light receiver 40 shown in FIG. 3 is arranged in this guide section 30 as necessary. This light receiver 40 has the same width as the front surface of the housing 20, and a phototransistor 42 which is a light receiving element is provided in the center. A connecting portion 41 formed in a shape that fits into the guide portion 3o of the casing is disposed in a protruding manner.

The connecting portion 41 is guided by the guide portion 30 of the housing so that when the light receiver 40 is placed on the front surface of the housing, the optical axis of the light receiving element and the light emitting element on the front surface of the housing coincide with each other.
is formed.

Next, the operation of this embodiment configured as described above will be explained.

First, the load voltage V supplied from the outside via the terminal section 23
The pulse generator 10 multiplies and integrates the load current I, converts it into a pulse output, divides the frequency, and then displays the frequency division value on the display surface 24 on the front surface of the housing by the counting display unit 16. The single light emitting diode 17 also emits light in response to the pulse output, and outputs the pulse output of the pulse generator 10 as a light emitting pulse to the outside of the housing 2o in an electrically insulated state.

When it is necessary to check the operating status of the device or transmit data using this emitted light pulse, a light receiver 40 is attached to the front of the casing while being guided by its guide portion 30. A luminescence pulse is received. The connecting part 41 of the light receiver 40 is inserted into the guide part 30 of the housing 20, and the light receiver 40 is arranged on the front surface of the housing 20 so that the light receiving element 42 and the light emitting element 17 face each other with the maximum facing area. be done.

In this way, the light-receiving element 42 can be easily arranged so as to face the light-emitting element 17 in the same state at all times by means of the light-emitting element 30 formed in the housing 20. Therefore, the light emission pulse is transmitted with high efficiency and always in a constant state. Further, since the front surface of the housing 20 and the light receiver 40 are arranged in close contact with each other depending on the fitting state of the guide portion 30 and the connecting portion 41, the influence of ambient light can also be avoided.

Next, a method for testing a transmission error in a pulse generator of a light emission pulse transmitting device configured as in this embodiment will be described. Here again, the light emission pulse transmitting device will be explained as an electronic wattmeter.

For electricity meters, the characteristics of the test meter are usually measured through comparison tests. That is, as shown in FIG. 4, the load current I, @pressure ■ generated by the imaginary load power supply 50 is connected in series,
■ is a test watt-hour meter 1 and a standard watt-hour meter 60 in parallel.
The light emitting pulse output of the test watt-hour meter 1 is received by the receiver 40, this and the standard pulse output from the standard watt-hour meter are counted by a counter, and the results of both type dynamometers 1 and 60 are calculated. This is to compare and find the error.

Conventionally, when performing this test τ, there were drawbacks such as it took a great deal of time to position the light emitting element 17 and the light receiving element 42, and the light receiving level of the emitted light pulses varied depending on the instrument under test. However, in this embodiment, since the guide portion 30 for guiding the light receiving element 42 of the light receiver 40 to a position facing the light emitting element 17 is formed in the housing, positioning can be easily performed under the same conditions at all times. It became Q.

Although this embodiment has been described using an example of a groove as the guide part 3o, in this invention the guide part 30 guides the connecting part 41 of the light receiver 40 and connects the light emitting element 17 and the light receiving element 4.
Any shape may be used as long as it allows the two to always face each other in the same state.

For example, the guide part may be a hole drilled in the casing surface (front surface) from which the light emitting element protrudes, and the connecting part of the light receiver may be formed as a convex part inserted into this hole. The connecting portion of the light receiver may be formed as a concave portion having a shape corresponding to the convex portion protruding from the front or side surface of the body.

In addition, by using a light receiver equipped with a light shielding plate as shown in Figures 5 and 6, or a light receiver painted black to prevent diffuse reflection of light, the effect of ambient light can be sufficiently suppressed. Therefore, the signal transmission of the light emission pulse can be reliably performed in a low noise state.

Furthermore, in the embodiment, explanation was given using an example of a 'Machiko 2' rudder power meter as a device for generating light emission pulses, but the present invention is not limited to an electronic watt-hour meter; Any device may be used as long as it can transmit signals to the outside while being insulated.

〔Effect of the invention〕

As explained above, this invention (by forming a guide part for guiding two light-receiving elements of a light receiver to a light-emitting element on the body) allows the light-emitting element and the light-receiving element to face each other easily and always in the same state. It can be placed in a specific position and can efficiently transmit signals using light emitting pulses.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a pulse generator according to an embodiment of the present invention, and FIGS. 2(a) and 2(b) show the configuration of an embodiment of the present invention, and FIG. is a front view, figure (b) is an it+:+ side view, and
Figure b) is for explaining the configuration of an embodiment of the present invention; Figure 4A is a front view, Figure 4B is a side view, and Figure 4 shows the operation of an embodiment of the invention. 5(a) and 5(b) are block diagrams for explaining the structure of another embodiment of the present invention.
) is a side view, FIGS. 6(a) and 6(b) show the configuration of another embodiment of the present invention, FIG. 6(a) is a front view, and FIG. 6(b) is a front view. a) Sectional view of FIG. 4-A. 10... Pulse generator 20... Housing 17... Light emitting element 30... Guide part 40... Light receiver
42...Representative for light-receiving element Patent attorney Kensuke Norichika (and one other person) No. 1 Figure 1] (+) (b) 21
Part 3. (, -1) (11) Fourth
i no 1 51st so 1

Claims (4)

[Claims] (1) A pulse generator that converts a supplied electrical signal into a pulse output, a casing that houses the pulse generator inside, and a casing that protrudes from the casing and that converts a supplied electrical signal into a pulse output. a light emitting element that emits light and outputs the light emitting pulse to the outside of the housing, and a light receiver that receives the light emitting pulse from the light emitting element while being electrically insulated from the outside of the housing, is connected to the light receiving element and the light emitting element. A light emission pulse transmitting device characterized in that a guide portion is formed in the casing to guide the device to a position facing the device. (2) The light emitting pulse transmitting device according to claim 1, wherein the guide portion is a groove bored in the side surface of the casing. (3) The light emitting pulse transmitting device according to claim 1, wherein the guide portion is a hole bored in the side surface of the casing. (4) The light emitting pulse transmitting device surface according to claim 1, wherein the guide portion is a protrusion that is protruded from the side surface of the casing.