JPS647480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric farm using batteries as a power source for the purpose of driving away vermin such as wild boars by stretching bare electric wires around fields and farms and passing an impact current through the bare wires. It is related to fence equipment.

Storage batteries or laminated dry batteries are used as the batteries for electric fencing equipment that uses batteries as a power source (hereinafter referred to as the fencing equipment), but depending on the manufacturer of the fencing equipment, the battery voltage is rated at 6V. At present, the rated voltage is not standardized, with some models using a battery with a battery voltage of 12V.

The shape, size, and shape of the 6V and 12V storage batteries and laminated dry batteries used in the fence,
The design is very accurate, and even people with electrical knowledge sometimes make mistakes. In fact, most of the users of these fences are farmers who have no knowledge of electricity, and they often do not know which model is rated at what volts, so when they first use the fence after purchasing it, There is no problem because a storage battery or laminated dry cell battery of that rating is inserted, but if the storage battery or laminated dry cell battery is exhausted and you want to replace it, you may purchase one with a voltage different from the rated voltage and connect it. Often.

If you connect a 12V battery to a model with a rated voltage of 6V, the circuit will break down, the input current will increase significantly, and the battery will quickly run out, making it unusable. Also, if you connect a 6V battery to a model rated at 12V, no shock voltage will be generated or sufficient shock voltage will not be obtained, making it unusable.

FIG. 1A is a diagram showing the configuration of an electric fencing device using batteries as a power source. In this FIG. 1A, the power supply battery voltage E _B is applied to the oscillation circuit to cause it to oscillate.
It is converted into a boosted alternating current voltage, and this output is rectified by diode D ₁ to charge charging/discharging capacitor C ₀ . Now, if this Fig. 1 A is manufactured with a rated voltage of 6V, when the power supply battery voltage E _B is 6V,
The charging voltage V ₀ of the capacitor C ₀ rises to E ₀ as _shown in FIG. ₀ → Anode of the thyristor → Cathode of the thyristor → A sudden discharge occurs in the path on the primary side of the output transformer _T1 , and an impulse voltage shown as D in the figure is generated on the secondary side of the output transformer. When a 12V power supply is connected to this, the value of V ₀ becomes much higher than in the case of 6V, as shown in Figure B.
When electronic components such as diodes, capacitors, and thyristors are subjected to voltages that exceed their withstand voltages, they become defective, the input current increases extremely, and the batteries quickly become exhausted, resulting in failure. Also, the shock voltage output is
As shown in figure D, the output transformer becomes higher than necessary.
It causes dielectric breakdown of T ₁ , making it unusable.

The present invention solves these problems and provides 6V,
The purpose of this work is to provide a fence that provides a stable impulse voltage output no matter which voltage of 12V battery is connected.

That is, the present invention uses a battery as a power source, activates an oscillation circuit to oscillate, rectifies the oscillation output, obtains a DC voltage higher than the voltage of the power source battery, charges a charging/discharging capacitor with this, and discharges the charged charge. In an electric fencing device configured to rapidly discharge voltage to the primary side of an output transformer through an element such as a thyristor, and obtain an impact voltage on the secondary side of the output transformer, the charging/discharging capacitor is charged. If the charging voltage is maintained at the reference level regardless of whether the voltage of the power supply battery is high or low, the shock voltage output will be constant whether the power supply battery voltage is 12V or 6V.
The voltage detection circuit detects the battery voltage (hereinafter referred to as the battery voltage detection circuit), and uses this detection output as a signal to control the switching element used in combination with the battery voltage detection circuit depending on the level of the battery voltage. When activated and the battery voltage of the power source is high, the switching element switches the circuit constant of the oscillation circuit to reduce the oscillation output,
In addition, when the battery voltage of the power supply is low, the circuit constants of the oscillation circuit are changed to increase the oscillation output, and the charging voltage charged to the charging/discharging capacitor is maintained at the reference level. A constant and stable shock voltage is obtained whether the battery voltage is 6V or 12V.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. FIG. 2 shows the first embodiment, in which a multibrator type oscillation circuit is adopted as the oscillation circuit, and a latching relay is used as a switching element for changing the circuit constant of the oscillation circuit. This second
In the figure, 1 is a battery voltage detection circuit, 2 is an oscillation circuit, 4 is a trigger signal generation circuit, l ₁ , l ₂ , and l ₃ are terminals of the latching relay 3, and L ₁ and L ₂ are operating windings of the latching relay 3. wire, and return winding. Further, 1' is a circuit that generates one pulse when the power is turned on. As is well known, the latching relay has its terminals
It is not necessary to keep current flowing through the windings to switch l ₁ , l ₂ , and l ₃ ; if you temporarily let current flow through the windings,
Terminals can be switched. In this example, the terminal
To connect l ₃ and l ₁ , it is sufficient to temporarily pass current through the working winding L ₁ , and to connect terminals l ₃ and l ₂ ,
All you have to do is temporarily pass current through the return winding _L2 . As shown in Figure 2, the terminal _l1 is connected to the high voltage side output winding of the oscillation transformer of the oscillation circuit 2, the terminal _l2 is connected to the intermediate tap, and the common terminal _l3 is connected to the diode.
Connected to D ₁ to obtain DC charging voltage to capacitor C ₀ . Zener diode ZD ₁ of battery voltage detection circuit 1
If the power battery voltage is 6V, then the transistor _Q1
becomes non-conducting, and when the power supply battery voltage is 12V, Q ₁
is selected to have a zener voltage value that results in conduction. Therefore, the voltage at point a in this figure is high when it is 6V, and low when it is 12V.

And a, b, c, d, e, f, in Fig. 2,
The time charts of the voltages at each point g and h are shown in Figure 3 when the power source battery voltage is 6V, and in Figure 4 when the power source battery voltage is 12V. That is, when the power supply battery voltage is 6V, the voltage at point f becomes temporarily high when the power is turned on, and transistor _Q2 is temporarily turned on. At this time, the voltage at point h remains low and transistor _Q3 is in a non-conducting state. Due to the temporary conduction of _Q2 , a current temporarily flows through the operating winding _L1 , and the terminals of the latching relay 3 connect _L3 and _L1 , and the oscillation circuit 2 works as a 6V oscillation circuit. Its output is rectified by diode D ₁ and charges capacitor C ₀ to a constant reference voltage E ₀ . Then, the thyristor is made conductive by a trigger signal from the trigger signal generating circuit 4, and a normal shock voltage is generated at the output terminal. When the power battery voltage is 12V, the second
The voltage at point f in the figure remains low as shown in the time chart in Figure 4, and transistor Q ₂ remains non-conducting, but the voltage at point h temporarily increases when the power is turned on, so Q ₃ is temporarily conductive and the return winding L ₂
A current temporarily flows through the latching relay 3, and the terminals _l3 and _l2 of the latching relay 3 are connected. Since l ₂ is connected to the middle tap of the output winding of the oscillator circuit, the oscillation output will be the same as in the case of 6V, and the capacitor C ₀ will be connected to the middle tap of the output winding of the oscillation circuit.
The battery is charged to the same constant reference voltage E ₀ as in the case of , a trigger signal is obtained from the trigger signal generation circuit 4, the thyristor is made conductive, and a regular shock voltage is generated at the output terminal. The trigger signal generation circuit 4 is supplied with a voltage stabilized by a Zener diode ZD ₂ .
Trigger signals with the same cycle are generated for both 6V and 12V. In this way, even in the case of 6V
It operates normally even with 12V, and the power battery lasts for a long time.

Next, a second embodiment is shown in FIG. This second embodiment has the same battery voltage detection circuit, etc. as the first embodiment, but employs a blocking oscillator type oscillation circuit for the oscillation circuit 2, and the terminals of the latching relay.
l ₁ , l ₂ , and l ₃ switch the base resistance of transistor Q ₄ of this blocking oscillator type oscillation circuit 2 to control the oscillation output and keep the charging voltage of capacitor C ₀ at the reference level. . This fifth
Resistor R ₁ in the figure is the base resistance when the power supply battery voltage is 6V, and resistor R ₂ is the base resistance when the power supply battery voltage is 12V. _R2 is selected so that the input current from the power supply to the oscillation circuit when the power supply battery voltage is 12V is smaller than the input current when the power supply battery voltage is 6V. Since the battery voltage detection circuit 1 and the like are the same as in the first embodiment, when the power supply battery voltage is 6V, the terminals _l3 and _l1 of the latching relay 3 are connected,
Operates as a 6V oscillator circuit. Figure 6 A, B,
C, the power supply battery voltage 6V in this second embodiment
The charging voltage V ₀ of the capacitor C ₀ at the time, the trigger signal from the trigger signal generation circuit 4, and the impact voltage at the output terminal are shown, respectively. As shown in Figure 6A, when the power supply battery voltage is 6V, the charging voltage _V0 of the capacitor _C0 is charged up to a constant reference voltage _E0 , and the thyristor is made conductive by the trigger signal shown in Figure 6B, and the normal shock is generated. A voltage output is generated to the output transformer _T1 .

Next, when the power supply battery voltage is 12V, the battery voltage detection circuit 1 etc. are the same as in the first embodiment as described above, so the terminals of the latching relay ₃ in FIG. ₂ are connected. Then, it will operate as a 12V oscillator circuit, but the base resistor _R2 of transistor _Q4 is selected so that the input current from the power supply at this time is less than the input current at 6V, so the capacitor The charging voltage V ₀ of C ₀ is
It rises slowly from 6V.

V ₀ increases more rapidly as the input current from the power source battery to the oscillation circuit increases, and increases more slowly as the input current to the oscillation circuit decreases. That is, since the rate of increase in V ₀ can be changed by the value of R ₂ , there is an appropriate value for R ₂ , and this selection method will be explained below. In Figure 7 A, B, and C,
The charging voltage V ₀ of the capacitor C ₀ , the trigger signal from the trigger signal generation circuit, and the impact voltage at the output terminal when the power supply battery voltage is 12 V in this second embodiment are shown. As shown in FIG. 7A, when the power supply battery voltage is 12V, the charging voltage V ₀ of the capacitor C ₀ is
It gradually increases, and if left as it is, it will reach a high value as shown by the broken line in the same figure, but as mentioned earlier, this rate of increase in V ₀ is due to the transistor Q ₄
The base resistance R can be changed by the value of ₂ , so
If the value of R ₂ is selected so that the trigger signal shown in FIG. 7B is generated just when V ₀ reaches a certain reference voltage E ₀ , then when V ₀ reaches E ₀ , The thyristor conducts and generates a normal impulse voltage in the transformer _T1 . Naturally, V ₀ will never rise above E ₀ ,
It works properly. When testing with E ₀ set to 320V, C ₀ set to 2.2MF, and the trigger signal period set to 1.1 seconds, the input current at 6V is 44mA, and the input current at 12V is 21.5mA.
It worked just fine, generating a regular shock voltage output at both 6V and 12V, and operating normally.

As described above, according to the present invention, in an electric fencing device that uses a battery as a power source, the battery voltage of the power source is detected by a battery voltage detection circuit, and the switching element combined with this is detected depending on the level of the power source battery voltage. The switching element switches the circuit constants of the oscillation circuit and controls the oscillation output to maintain the charging voltage of the charging/discharging capacitor _C0 at the reference level. It operates without failure even when connected, and a stable shock voltage can be obtained. As mentioned above, many users of electric fencing devices have no knowledge of electricity, and the 6V used in this electric fencing device
Considering that 12V storage batteries or laminated dry batteries are very similar in shape, size, design, etc., they will work without any problems whether you connect a 6V battery or a 12V battery. The electric fencing device of the present invention is extremely beneficial not only to its users, but also to its manufacturers and service providers. In this example, a Zener diode and a transistor were used in combination in the power supply battery voltage detection circuit, but other materials such as a lambda diode,
It can also be implemented by combining photocouplers, operational amplifiers, relays, integrated circuits, etc. Further, in this embodiment, a latching relay is used as a switching element for changing the circuit constant of the oscillation circuit, but other relays, thyristors, GTOs, switching transistors, etc. may also be used.

[Brief explanation of drawings]

Figures 1A, B, C, and D are respectively a block diagram of an electric fence using a battery as a power source, a diagram showing the charging voltage V ₀ of the capacitor C ₀ , and a diagram showing the trigger signal from the trigger signal generation circuit. FIG. 3 is a diagram showing the impulse voltage output of the output transformer _T1 . Fig. 2 shows the first embodiment of the present invention, Fig. 3 shows the power supply battery voltage 6V.
a, b, c, d, e, f in Fig. 2 at the time,
Figure 4 shows the time chart for each point g and h, and Figure 4 shows the time charts for a, b, and Figure 2 when the power supply battery voltage is 12V.
It is a figure which shows the time chart of each point c, d, e, f, g, and h. FIG. 5 is a diagram showing a second embodiment of the present invention. Figure 6 A, B, and C are the capacitors C ₀ in Figure 5 when the power supply battery voltage is 6V, respectively.
7 is a diagram showing the charging voltage V ₀ , the trigger signal from the trigger signal generation circuit, and the impact voltage output.
Figures A, B, and C are diagrams showing the charging voltage V ₀ of the capacitor C ₀ in Figure 5, the trigger signal from the trigger signal generation circuit, and the impact voltage output, respectively, when the power supply battery voltage is 12V. DESCRIPTION OF SYMBOLS 1...Battery voltage detection circuit, 1'...A circuit that generates one pulse when the power is turned on, 2...Oscillation circuit, 3...Latching relay, 4...Trigger signal generation circuit.

Claims (1)

[Claims] 1 A battery is used as a power source, an oscillation circuit is activated to oscillate, this oscillation output is rectified, a DC voltage higher than the voltage of the power source battery is obtained, a charging/discharging capacitor is charged with this, and this charged voltage is applied to a thyristor, etc. In an electric fencing device configured to cause a sudden discharge to the primary side of an output transformer and obtain an impact voltage on the secondary side of the output transformer through an element, a voltage detection circuit and a switching element are connected to the voltage detection circuit and the switching element. A circuit configured to operate the switching element using the detected output from the voltage detection circuit as a signal detects the battery voltage of the power source, and uses the detected output as a signal to operate the switching element as a power source. When the power supply battery voltage is high, the circuit constant of the oscillation circuit is switched by the switching element to reduce the oscillation output, and when the power supply battery voltage is low, the oscillation circuit is A battery characterized by a configuration in which the charging voltage charged to the charging/discharging capacitor is maintained at a reference level regardless of whether the power supply battery voltage is high or low by switching the circuit constants of the circuit to increase the oscillation output. An electric fencing device powered by