JPS6045814A - Optical control switch device for traveling object - Google Patents

Abstract

PURPOSE:To obtain an assured optical control output despite the fluctuation of the indoor light or the natural light by using an amplifier which produces the clear output voltage of high and low levels and has both ON and OFF switch states. CONSTITUTION:If a main photodetecting element D1 gets into a shadow between time points t1 and t2, the terminal voltage VD is negative. At the same time, the input voltage V1 also becomes negative and set at a level lower than the reference voltage VS from a level higher than the VS. Therefore the output voltage V0 is chged to a high level from a low level. Then the area between output terminals S and S' is kept off for a period between 0-t1 and then kept on for a period between t1-t2 respectively if a switching transistor TS is connected to the output terminal. In other words, the capacity is obtained to flow a current to the terminal S' from the terminal S. While the voltage VD is kept positive for a period between t3 and t4 when a compensating photodetecting element D2 is kept within a shadow. At the same time, the voltage V0 is set at a low level and the area between terminals S and S' are kept off. Therefore the area between S and S' is kept on only in the period between t1-t2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the voltage or impedance of a light receiving element that is generated when a traveling object running on a rail or along a guide object falls on the main light receiving element for detecting shadow light due to indoor light or natural light. This invention relates to an optical control switch device for a traveling object that uses change.

As an optical control switch device for this type of traveling body.

The inventor of the present application proposed Japanese Patent Application No. 58-86341 entitled "Optical Control Switch Device for Rail-Traveling Vehicles." The device of this earlier application has the effect of being able to take out control power without having to place any equipment such as a floodlight on the side and without being interfered with by ambient light. It has been recognized that malfunctions may sometimes occur due to factors such as variations in the characteristics of light-receiving elements that are still used in environments with fluctuations in natural light.

It is an object of the present invention to provide an optical control switch device for a traveling body that can eliminate these drawbacks of the prior cylinder and provide a reliable control output even in an environment where indoor light or natural light fluctuates. .

In order to achieve this objective, the present invention uses a compensating photodetector having almost the same characteristics as the main photodetector, uses a circuit that compensates for the terminal voltages of both, and has a large amplification factor. By using an amplifier with a key type characteristic or hysteresis characteristic with a steep rise, the switch operation can be made more reliable, and furthermore, the voltage difference and noise voltage due to the harshness of the characteristics of the light receiving element can be reduced to the threshold of the key type characteristic or hysteresis characteristic of the amplifier. The structure is such that a bias voltage is applied to prevent this from occurring, thereby preventing variations in characteristics and malfunctions due to noise voltage.

That is, the present invention produces an output voltage V0 with good sensitivity and a clear high level (H) or low level (L), and
An amplifier is used that has two switch states, N or OFF, but to simplify the following explanation, the input voltage is either at a higher level (h) or a lower level (h) than the reference voltage Vs.
Depending on l), the output voltage V0 will be at a high level (H).
The converter type amplifier (C
ON) and its opposite characteristics, i.e., depending on whether the input voltage is at a higher level (h) or lower level (l) than the reference voltage Vs, the output voltage V0 is at a higher level (L), but it is at a higher level (H). ) is used, and furthermore, converter type and inverter type amplifiers are used, which have the same human output level relationship but have hysteresis characteristics.

The present invention will be explained in detail with reference to the drawings below.

Figures 1(a) and (b) show the Compaq type widening device (CO).
The input/output characteristics and reference voltage Vs of the inverter type amplifier (INV) and the inverter type amplifier (INV) are shown. In addition, (c) and (d) respectively show the input/output characteristics and reference voltage of a converter type amplifier and an innoter type amplifier having hysteresis characteristics. Furthermore, the first
The table shows the two types of amplifiers and the manual pressure V for VS.
1 and the level relationship between V1 and V0, and since a converter type amplifier (CON) can be obtained by cascading an even number of inverter type amplifiers (INV), the explanation will be based on the inverter type. The square converter type embodiment is shown only in the drawings.

Next, detailed examples will be explained. First, an example will be described in which a voltage such as solar heavy oil, in which the voltage induced by light is sufficiently large, is not used.

As shown in Fig. 2(a), the main light receiving element D1 and the compensation light receiving element D
2 as its induced voltage VD1. If the terminals are connected in series so that VD2 cancels out each other, the terminal pressure VD becomes almost zero, and due to variations in characteristics, a slight difference voltage of ±ΔVD and noise voltage vn remain. In normal conditions, when there is no shadow of a running object on D1, the terminal voltage VD is almost zero, as mentioned earlier, so as an amplifier, an amplifier with a reference voltage Vs of zero should be selected. It is more convenient. Therefore, VD=±ΔVD+vn Vs=0 Next, in order to prevent the amplifier from malfunctioning due to error voltage ±ΔV due to characteristic variations and noise voltage vn exceeding the reference voltage Vs, which is the threshold value, the shadow of the traveling object is placed on the main photodetector D1. If the terminal voltage VD becomes positive or negative when the voltage drops, give the opposite voltage as the bias voltage VB and set its value |
It is made thicker than ΔVD|+|vn|, and a means is used to prevent malfunctions caused by the error voltage ΔVD and the noise voltage vn. That is, VB>|ΔVn|+|vo| Therefore, in the case of FIG. 2(a), when the main light receiving element D1 enters the shadow of the traveling object, the terminal voltage VD becomes negative, so the power supply voltage VCC is connected to the resistor. Figure 2(c) shows the characteristics of the input/output voltage when a bias voltage VB with a value shown in the above equation is divided between R and RB and its opposite positive value is generated at the terminal of RB. If the main light receiving element D1 enters the shadow between The output voltage V0 changes from the low level (L) to the high level (H) because the output voltage is at the level (L) and therefore the innoharter is present. If the switching transistor Ts is connected to this output terminal as shown in the figure, the voltage between the output terminal SS' is 0 to
It is OFF until t1, and turns ON from t1 to t2 when the main light receiving element D1 is in the shadow. That is, it has the ability to flow more current into S' than S. In addition, supplementary light receiving element D
During the period from t3 to t4 when the main light receiving element D1 is in the shadow, the terminal voltage VD is positive, the output voltage V0 is at a low level, and the terminal SS' is OFF. Terminal SS' is ON only during t2.

As described above, it is possible to obtain a highly sensitive and reliable optical control switch device for a traveling object. Figure 2 (b) and (d)
) are examples and input/output characteristics in the case where a converter (CON) is used, but since they are the same as in the case of an inverter (INV), the explanation will be omitted.

In the case of Fig. 2, the main light receiving element D1 and the compensation light receiving element D2
To connect the positive (+) terminals in series, a circuit was used in which the positive (+) terminals were connected together, and the terminal voltage VD became negative when the main light receiving element D1 entered the shadow. An arrangement in which the negative (-) terminals of the light receiving element D1 and the compensation light receiving element D2 are connected may be used. In this case as well, when the main light receiving element D1 enters the shadow, the terminal voltage VD becomes negative, so the bias lightning voltage VB is applied so as to become positive. The embodiment of FIGS. 3(a) and 3(b) and the input/output characteristics are shown in FIGS. 3(c) and 3(d). This case is also the same as the case of FIG. 2, so detailed explanation will be omitted.

Further, as for how to apply the bias voltage VB, the following means can be used. That is, the compensation light receiving element D
By making the induced voltage of 2 smaller than the induced voltage of the main light receiving element D1, the main light receiving element D1 and the compensation light receiving element D2 are
The difference between the induced voltages can be used as the bias lightning voltage VB.

Suppression of the induced lateral pressure can be achieved by covering the compensating light-receiving element D2 with a filter that limits the light, or by inserting a resistor in parallel, or by changing the structure of the ship. A specific example is shown in FIGS. 4(a) and 4(b). In (a), hatched portions indicate filters that restrict transmission of light.

Next, an embodiment that utilizes a change in resistance of a light receiving element will be described. Photodiodes and phototransistors have low induced voltage due to light, so voltage cannot be used or pn
When a current is passed from the n to the p of the junction, the resistance changes due to light, and the terminal voltage changes from low when the light is strong to high when the light is weak. Father, the solar cell also connects from the (-) terminal to (
+) When a current is passed in the direction of the terminal, a similar change occurs depending on the intensity of light. These light-receiving elements have current directionality, and when a current is passed in the opposite direction, the terminal voltage changes extremely little depending on the intensity of light. On the other hand, CDS and the like are elements whose resistance changes depending on light, regardless of the direction of the current flowing. In the following embodiments, a photodiode is taken as an example, and the symbols p and n of the pn junction of the diode are indicated by + and -, respectively, as in the embodiment shown in FIG. Therefore, the direction of current in which the resistance changes due to light is when the current flows from the (-) terminal to the (+) terminals, and for frost flow in the opposite direction, there is almost no change in resistance depending on the light. It's not easy.

As shown in the embodiment of FIG. 5, the main light receiving element D1 whose resistance changes with light and the compensation light receiving element D2 are connected in series in the direction of the eye, and both terminals are connected to a power source, so that a current I flows in the direction of the arrow.
When the main light receiving element D1 and the compensation light receiving element D2 receive light uniformly, their terminal voltages are almost equal, so the voltage at the connection point of both light receiving elements is approximately 1/1/1 of the power supply voltage VCC. Become 2. However, when only the main light-receiving element D1 is in the shadow, the resistance increases, and therefore, in FIG. 5, the voltage at the connection point becomes lower than 1/2 of the power supply voltage VCC. Under normal conditions, the voltage at the connection point is approximately 1/2 of the power supply voltage VCC, so an inverter or converter designed to have a reference voltage VS 1/2 of the power supply voltage VCC is used.

FIG. 5(a) shows that the reference voltage Vs is the power supply voltage V as an amplifier.
This is an example using 1/2 of CC, and VS is V
Express it as S=1/2VCC. Terminal voltage VD1. of main light receiving element D1 and compensation light receiving element D2. Although VD2 is almost equal in phase, there are variations in characteristics, so the voltage difference due to the variation is set as ΔVD, and ΔVD is expressed as ±ΔV=VD1−VD2. In FIG. 5, when the skewer light receiving element D1 enters the shadow of the running body, the voltage of the main light receiving element D1 increases, and the amplifier manual voltage V1 becomes lower (l) than the reference voltage VS. , when the main light receiving element D1 and the compensation light receiving element D2 are uniformly illuminated, a positive piaz that is sufficiently larger than the sum of |ΔVD| and |vn| is set so as not to malfunction due to ±ΔVD and noise voltage Vn. Main light receiving element D1. It is applied as the terminal voltage of the bias resistor RB connected in series with the compensation light receiving element D2 to prevent malfunction. Therefore bias abuse VB
is expressed by the following formula.

VB>|ΔVD|+|vn| FIG. 5(c) shows the input/output characteristics of FIG. 5(a), and the input voltage V1 is expressed by the following equation.

V1=VD1+VD2+VB During the time up to t1, light is uniformly emitted to the main light receiving element D1 and the compensation light receiving element D2, and between t1 and t2, a shadow falls only on the main light receiving element D1, and further between t3 and t4. If a shadow falls only on the compensation light-receiving element D2, the level is high (h) between 0 and t1 and after t2, and particularly high between t3 and t4. On the other hand, the level (l) is maintained between t1 and t2. Therefore, the output voltage V0 is at a high level (H) only between t1 and t2, and the connection between the output terminals SS' of the switching transistor TS is ON only between t1 and t2, and OFF otherwise. As described above, a circuit is created in which a switch is activated by passing the Ichihara over the light receiving element and using the change in the terminal Ichikawa due to the change in resistance of the light receiving element due to light, when the shadow of the traveling object falls on the main light receiving element. Get it, be able to do it. Figure 5(b)
and (d) are the yellow voltage VS-1/2VCC at the amplifier, respectively.
An example using the converter (CON) and its human output characteristics will be shown, but since the operation is similar to the example shown in FIG. 5(a), detailed explanation will be omitted. Also, bias resistor RB
Although an embodiment may be considered in which the terminal is connected to the VCC terminal and the d terminal to apply a negative bias, illustration thereof is omitted.

Next, an embodiment using a differential amplifier as the amplifier will be described. In a differential amplifier like the one shown in Fig. 6(a), there is a case where the terminal voltages of the two terminals + and - are set to V, respectively.
+ and V-, the input/output relationship and the state of the switching transistor Ts are as shown in Table 2. The relationship between the + terminal and the - terminal is such that the other voltage is used as the reference voltage VS, and the relationship between the + terminal and the - terminal and the output terminal is that of a converter (CON) and an inharter (INV), respectively. Fig. 6(b) From the output to the - terminal this feedback resistor RH
', RH can be used to create a differential amplifier with positive feedback and a hysteresis characteristic. You may also use an amplifier with

The embodiment shown in FIG. 7(a) operates in the same way as the embodiment shown in FIG. It's convenient to be able to use the terminals separately.

Although the embodiments shown in FIGS. 2 and 3 can all be realized using differential loudspeakers, detailed explanations will be omitted.

Figures 7(b) and 7(c) show a photodiode, a phototransistor, and a photodiode, a phototransistor.

Solar cells, CDS, etc. can be used.

7(b) and (c) show the main light receiving element D1. The compensation light receiving element D2 and the resistors RB and RB' are connected in a bridge type,
In another embodiment, one pair of terminals of the bridge is connected to a current flowing from the power supply side, and the other pair of terminals are connected to the + and - terminals of the oyster-shaped characteristic, and the necessary bias voltage is obtained by the difference between RB and RB'. The coffin was constructed in this way, and the case using a phototransistor is shown as a representative example. Since the operation of Sen's circuit is similar, a detailed explanation will be omitted.In this case as well, instead of applying the bias voltage VB using the bias resistors RB and RB', a filter and parallel resistance as shown in Fig. 4 are used to apply the bias voltage. Be able to give.

Next, FIG. 8 shows a case where the light-receiving elements of these embodiments are mounted near a rail or a guide rail, taking the rail as an example. Figure 8 (a) shows an example using the solar cells shown in Figures 2 and 3, and (b) shows an example in which current is passed through the light-receiving element shown in Figure 5. , further (c)
This is a diagram in which a CDS or the like is used instead of the photodiode shown in FIG. 5 as the light receiving element, even though current is passed through the light receiving element.

TR shown by the rectangle at the father point is a traveling object, and when the traveling TR reaches the position value in the figure and casts a shadow only on the main light receiving element D1, T
The operation of the s switch is explained with an explanatory diagram. Running body T
The switch operates at the position shown in the figure where R advances only from the left or right direction indicated by the arrow, casting a shadow only on the main light receiving element D1.

The above are the basics of the embodiments of the present invention.

When using the photoelectric switch of the present invention, it is very convenient to use as few lines as possible from the light receiving element installed on the rail or guide rail side. The reason for this is that even in the case of a simple layout, the distance between the rail side and the control circuit side is often close to 1.00 lines, so it is more convenient to reduce the force on the crossover wires. For example, in Figure 8, (a) requires two lines, and (b) and (c) require three tree ties, so (a) is more convenient. Next, another embodiment in which the number of wires to be connected to the rail side is reduced will be described.

FIG. 9 shows an embodiment in which the number of rails and crossover wires is reduced by one compared to FIG. 8. An embodiment using a photodiode as a light receiving element is shown in FIG. 9(a).

In the figure, the switch SW is a voltage supply device that supplies heavy pressure to the rail in order to move the PP running body TR, and switches the polarity of the voltage applied to the rail to change the traveling direction of the running body TR.
When the switch SW is pushed to the left or right in the direction of the solid line or dotted line arrow, the traveling body moves in the direction of the solid line or dotted line arrow. The variable resistance Rs is the running body T
It is a variable resistance that changes the speed of R. Therefore, the traveling body TR
When the terminal RL1 is moving to the left or right, a positive voltage is applied to the terminal RL1, a negative voltage is applied to the terminal RL2, or a positive voltage is applied to the terminal RL1, and a positive voltage is applied to the terminal RL2. On the other hand, main light receiving element D1. Terminal d' on the compensation light receiving element D2 side of the series circuit of the compensation light receiving elements D2
is connected to the rail through two diodes so that the direction of the diode is forward on the rail side. In addition, the intermediate connection point m of the optical element and the terminal d on the side of the main light receiving element D1 are connected to the optical switching circuit PS1, and the terminal M is connected to an inverter (
Terminal D is also connected to the positive terminal of the power supply. Further, to the input terminal of the inharter, a current is applied from a positive terminal on the power supply side through a resistor R to provide a positive bias voltage VB. In this embodiment, terminal RL1
Alternatively, even if one side of the terminal RL2 becomes negative, the compensating light receiving element D2 is connected to the negative terminal of the power supply through the diode, so the operation of this combination is the same as that shown in FIG. 5(a). , when the shadow of the traveling object falls on the main light-receiving element D1, the terminal S
S' song is turned on. Figures 9(b) and 9(c) are other embodiments in which solar cells or CDS are used instead of photodiodes, and only the light receiving elements and diodes attached to the rail are shown, but d and m The voltage supply bag P
If it is connected to the terminal D and the terminal M of S, a special effect similar to that shown in FIG. 9(a) will be produced. In this case, compared to Figures 8(b) and 8(c), a rectangle that is slightly longer than the length is created. FIG. 9(d) shows the main light receiving element D1. This is an example in which a solar cell and a light control switch circuit PS2 are used as the light-receiving element D2, and corresponds to the embodiment of FIG. 2(a) in which no current is passed through the light-receiving element, and operates in the same way. In this case, the 2 strands in Figure 8 (a) are 1
No. 10, which can be reduced to a book and the crossover wire can be made into one tree.
The figure shows an example in which only one tree is needed for the crossover from the rail side.
The voltage supply device PP is the same as that shown in FIG. Figure 10 (a
) is an embodiment in which a photodiode is used as the light receiving element, and the main light receiving element D1 and the compensation light receiving element D2 are connected in series with diodes D0 and DO' sandwiched between them as shown in the figure, and both ends d and d are connected in series. ' are connected to terminal RL1 and terminal RL2, respectively. In this embodiment, in order to spread the voltage between the rails to the main light receiving element D1, an inverter (INV) is used.
Since it is necessary to apply approximately the same voltage to the inverter, the voltage in front of the switch SW, that is, the voltage between terminals RL1 and RL2, is equal in absolute value, but the normal pressure, which does not change in positive or negative, is applied to the inverter. Add to VDD as. Therefore, the standard voltage VS becomes 1/2VDD.

VS=1/2VDD A power supply voltage VCC, which is larger than VDD, is applied to the subsequent amplifier to sufficiently drive the switch jig transistor Ts. Further, a current is supplied to the terminal M by the resistor R, and a positive bias voltage VB is applied. Diauto D0, D
0' prevents grains from flowing in the opposite direction to the supporting light-receiving element D1 and the compensation light-receiving element D2, and prevents particles from flowing in the opposite direction to the main light-receiving element D1. This is to protect the compensation light receiving element D2.

However, for this reason, a positive box pressure is not applied to the terminal RL1 and a negative box pressure is applied to the terminal RL2, and when the traveling body TR moves in the direction of the solid arrow, when its shadow falls on the main light receiving element D1, the terminal SS'
The main light-receiving element D1 becomes ON for a while and the switch operates.
, diodes D0, D0', and the compensation light-receiving element D2.
Since the terminal RL1 is positive and the terminal RL1 is negative, no current flows through the main light receiving element D1, Neuauto D0, D0', and the compensation light receiving element D2, and therefore the switch is easy to operate. For this reason, this embodiment has a switch characteristic that has a directionality of operation shift only when a traveling object is moving from one direction, and this is a very useful application.

FIGS. 10(b) and 10(c) show a portion of a light receiving element attached to a rail in an example using a solar cell and a CDS.

In these two embodiments, m is also an optically controlled switch circuit PS.
If it is connected to the terminal M of No. 3, the operation is similar to that shown in FIG. 10(a). A description of its operation will be omitted.

Figures 10(d) and (e) show that when photodiodes, phototransistors, solar cells, etc. are used as the main light receiving element D1 and Yuzu's light receiving element D2, four diodes are used to create a double-wave rectification type. This is another embodiment in which the current always flows in the right direction even if the polarity of the voltage between the rails changes, and FIG. This is another implementation side used for the supplementary light receiving element D2. Since the CDS allows current to flow from either direction as shown by the caustic line and the dotted line, the main optical element D1 and the compensation light receiving element D2 are connected in series and both ends are connected to the superimposed rail. In any of these embodiments, if m is connected to the box M of the optically controlled switch circuit PS3, any of them can be used as a switch without directionality. Moreover, in any of the embodiments shown in FIG. 10, there is only one connecting wire, and the optically controlled switch circuit can be realized with a minimum number of connecting wires. Although these amplifiers have been described as having oyster-type characteristics, amplifiers having hysteresis characteristics may also be used.

Next, an embodiment in which an amplifier having hysteresis properties is actively utilized will be described. The amplifier in the previous embodiments was replaced with an amplifier with hysteresis characteristics.In order to do this, bias pressure VB was added to the input and output on the actual flow side in the waveform diagram shown in Fig. 11(b), and the hysteresis characteristics The operating point should be at the midpoint of the width VB. In FIG. 11(a), when the traveling object TR approaches the light receiving element from the right, the relationship between the time and the traveling object TR and the light receiving element is reduced. In this embodiment, it is possible to obtain a circuit in which the switch is turned on only when the shadow of the traveling body TR is cast on the main light receiving element D1 and only on the compensation light receiving element D2. That is, since the traveling body TR can be turned on while it passes the space where the main light receiving element D1 is placed, the circuit breaker at a railroad crossing can be opened, and the traveling body TR can be turned on while the traveling body TR is passing in the horizontal direction of the crossing rail. It can also be used to stop the power supply to the rail in order to save energy. Therefore, the example shown in FIG. 11 is extremely useful. To explain in more detail, in FIG. 11(a), the main light receiving element D1 casts a shadow at the time t1 of the traveling body TR, and at t2 both the main light receiving element D1 and the compensation light receiving element D2 cast a shadow. At time t3, only the compensation light-receiving element D2 is shaded, and at time t4, both the main light-receiving element D1 and the compensation light-receiving element D2 are shaded. The input voltage changes like V1, so the output voltage V0 jumps to H level at t1, and stays at H level even if V1 reaches a medium-high value at t2, and becomes L.
3, the main light receiving element D1. When the switch is turned ON while the light passes through the compensating light receiving element D2, it becomes sharp, and the application range of this suinochi is extremely wide. The most suitable one for this embodiment is the one shown in FIG. 10(f), in which V1 starts with a negative pulse voltage and ends with a positive pulse normal voltage no matter which direction the traveling body TR approaches. In the case of using the main light receiving element D1 having current directionality, (a
), (b), and (c) can be used by replacing the amplifier with an amplifier having hysteresis, or in this case, only the traveling object TR moving from one direction operates, and the traveling object TR moving from the opposite direction operates. It does not work for TR. In Figure 10 (
The examples of a), (b), and (c) proceed from the right and move to the running body T.
Only for R, the same operation as in FIG. 10(f) is performed.

Regarding the elongation example, if the traveling object approaches from the right or the left, the initial pulse voltage of Vl is different depending on whether it is positive or negative. I can't come.

As explained above, according to the present invention, the optical control switch device for a moving object using a light receiving element operates reliably with high sensitivity, and is an extremely excellent switch that can be applied to control many types of moving objects. be. There are dozens of types of control that can be considered, so we will omit listing each one here.

[Brief explanation of the drawing]

Figures 1 (a), (b), (c), and (d) show the characteristics of the conoverter type amplifier and the impark type amplifier used in the present invention, and the second
Figures (a) and (b) are circuit diagrams showing an embodiment of the present invention, Figures 2 (c) and (d) are waveform diagrams explaining the operation of the embodiment of Figure 2 (a) and (b), and 3(a) and 3(b) are circuit diagrams showing the embodiment of the present invention, and FIG. 3(c) and (d) are the circuit diagrams of FIG. 3(a).
(b) is a waveform diagram for explaining the operation of the actual example, and Fig. 4 (a)
)(h) are connection diagrams of the light receiving element used in the present invention, FIGS. 5(a) and 5(b) are circuit diagrams showing an embodiment of the present invention, and FIG.
Figures (c) and (d) are waveform diagrams for explaining the operation of the embodiment shown in Figures 5 (a) and (b), Figures 6 (a) and (b), and Figure 7 (a).
)(b)(c) are circuit diagrams showing other embodiments of the present invention, FIGS. 8(a)(b)(c), FIGS. 9(h)(c) and 1.
Figures 0 (b), (c), (d), (e) and (f) are plan views showing examples of rail construction for a traveling body to which the present invention is applied, and Figure 9 (a).
10(d) and 10(a) are connection diagrams showing an example of a Yamazaki circuit for traversing and restricting rails of a traveling body to which the present invention is applied;
FIGS. 1(a) and 1(b) are a plan view and a waveform chart for explaining the operation, respectively, showing the operating mode of the present invention apparatus using an amplifier having hysteresis characteristics. D1... Main light receiving element, D2... Compensation light receiving element, I
NV...Impark type amplifier, CON...Converter type amplifier, VI...Input rich voltage, Vn...Output voltage, VS...Reference box pressure, VD...Series circuit of D1 and D2 terminal voltage, VB...bias small ball, VCC...
Power supply voltage, TS... switching transistor, RB
...Bias resistance, TR...running body, PP...
Heavy pressure supply device, SW...switch, RS...variable resistor, PS1, PS2, PS3...light control switch circuit,
D0...diode. Revision applicants Shinta Oshima 10 people, Manabu Inuzuka and 1 other person

Claims (2)

[Claims] (1) When performing a switch operation using changes in the induced voltage or impedance of the main light receiving element caused by the shadow of a traveling object running along the rail or guide rail falling on the main light receiving element, indoor light or natural light means for preventing malfunctions by canceling out changes in induced voltage or impedance of the main light receiving element due to fluctuations using a compensating light receiving element having the same special characteristics as the light receiving element; A key type having a steep rise to amplify the difference between the terminal voltages of the main light receiving element and the compensation light receiving element due to a change in the induced voltage or impedance of the element falling on one of the compensation light receiving elements, or An amplifier having hysteresis characteristics, and means for applying a bias voltage to the input side of the amplifier to prevent variations in characteristics of the main light receiving element and the compensating light receiving element and to prevent malfunction due to voltage exceeding the control limit. An optical control switch device for a traveling body, characterized by: (2) The traveling body according to claim 1, wherein one end of each of the main light-receiving element and the compensation light-receiving element is attached to the rail or guide rail directly or via a diode. Optical control switch device for use.