JPS6337960B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric pasture fence device for supplying power to a pasture fence in order to prevent escape or intrusion of animals, including domestic and domestic animals. Conventional devices require continuous power supply for a long period of time, resulting in large power consumption, and if a battery is used as a power source, frequent replacement is required, which is not economical.

The present invention has achieved power saving by paying attention to the habit of animals, etc., that once they receive an electric shock, they do not approach it. Examples of the present invention will be described below with reference to the drawings.

1 is a 12V battery power supply whose negative pole is grounded, and a voltage display circuit that detects whether or not the power supply voltage is above a predetermined value using transistors Tr ₁ and Tr ₂ and displays it using a light emitting diode L ₁ after the power switch SW. 2. A power supply circuit 3 that floats the negative terminal of the comparator at the subsequent stage to -13V, a drive circuit 4, and a detection circuit 5 equipped with the above-mentioned comparator are connected in sequence. and,
The positive terminal of this battery power supply 1 is connected to a DC-DC converter 6, and a high voltage generating circuit 7 is connected to this DC-DC converter 6, and these 6 and 7 are kept in an ungrounded state. One terminal of the secondary winding of the output transformer T ₁ of the high voltage generation circuit 7 is connected to the output terminal 9 via the first normally open contact 8, and the other terminal is grounded via the second normally open contact 10. It has been done. In this embodiment, the ground terminal 11 is illustrated for convenience. The output terminal 9 is electrically connected to a metal pasture fence 12 that is continuously stretched around a pasture, etc., and is further connected to the detection circuit 5 via a normally closed contact 13.

The drive circuit 4 includes two transistors Tr ₃ ,
A drive switch Ry, which is a relay, is provided which is driven when Tr ₄ is turned on, and the drive switch Ry operates the first and second normally open contacts 8, 10 and the normally closed contact 13. A capacitor C ₁ is connected in parallel to the base of _the first stage transistor _{Tr 3} , using a small resistor R ₁ and a diode D ₁ as a charging path. Only transistors Tr ₃ and Tr ₄
Configure a timer that stays on. L ₂ is an indicator light.

The detection circuit 5 includes a comparator OP that transmits a detection output to the base of the transistor Tr ₃ via a charging path;
The comparator OP is equipped with resistors R ₂ , R ₃ , R ₄ that provide a reference voltage to the input reference terminal, and a resistor R ₅ , variable resistor R ₆ , and resistor R ₇ that provides a comparison voltage to the comparison terminal. The output terminal 9 is connected via the closed contact 13. The variable resistor R ₆ adjusts the difference between the reference voltage and the comparison voltage so that this difference can be overcome by a small potential change input from the output terminal 9. The power supply circuit 3 also facilitates this by floating the negative terminal of the comparator OP to -13V. In addition, the neon tube is used as the comparison terminal.
NE ₁ and Zener diode ZD are connected as a safety valve. Also, the resistances R ₂ and R ₅ in the example are 2.2KΩ,
R ₄ , R ₇ is 30KΩ, R ₃ is 10KΩ, R ₆ is max. 20KΩ
It is.

The high voltage generation circuit 7 includes a charging/discharging capacitor C ₂ , an output transformer T ₁ , a switch element SCR, and a trigger element
It uses TS, etc., and when it is activated, approximately 1
Generates high voltage of approximately 10KV every second. Also, NE ₂ is an indicator light.

Next, the operation of the apparatus according to the present invention will be explained. When the power switch SW is turned on, a small control current is supplied to the power display circuit 2, power supply circuit 3, and detection circuit 5.

At this time, since the first and second normally open contacts 8 and 10 are open, the DC-DC converter 6 and the high voltage generation circuit 7 are not operating, and the power consumption of the battery power supply 1 is saved. When an animal or the like comes into contact with the pasture fence 12, the potential change is input to the comparison terminal of the comparator OP, inverting the comparator OP to a high output.
Therefore, the capacitor C ₁ is first rapidly charged by this detection output, and then the transistors Tr ₃ and Tr ₄ are sequentially turned on to drive the drive switch Ry. Therefore, the normally closed contact 13 opens, and the first and second normally open contacts 8,1
0 is closed, operating the DC-DC converter 6 and high voltage generation circuit 7. High voltage is applied to the animals etc. from the pasture fence 12, and this electric shock prevents the animals etc. from escaping or entering. When this operation starts, the normally closed contact 13 is already open, so the comparator OP has returned to low output, but the capacitor C ₁ as a timer
The above operation continues for about 10 seconds while transistors Tr ₃ and Tr ₄ are discharged and turned on. Also, during this operation, the normally closed contact 13 opens, so that high voltage is not applied to the detection circuit 5, thereby protecting it. In this way, according to the device of the present invention, the high voltage generating circuit is activated only when an animal or the like comes into contact with the pasture fence.
You can suppress power consumption, for example, if you use battery power,
It may have a small capacity, and the number of replacements can be reduced. In addition, the output terminal can be used both for detecting contact status and applying high voltage by switching the contact of the drive switch.
Moreover, when high voltage is applied, the high voltage can be cut off to the detection circuit, thereby providing protection. Further, since a timer is provided to keep the drive switch activated for a certain period of time from the start, the high pressure generation operation can be carried out reliably and to the minimum necessary level.

[Brief explanation of the drawing]

The drawing is an electrical circuit diagram of the present invention. DESCRIPTION OF SYMBOLS 1... Battery power supply, 4... Drive circuit, 5... Detection circuit, 6... DC-DC converter, 7... High voltage generation circuit, 8... First normally open contact, 9... Output terminal, 10... Second normally open contact, 11 ...Ground terminal, 12...Maki fence, 13
…Normally closed contact, Ry…drive switch, _C1 …capacitor, OP…comparator.

Claims (1)

[Scope of Claims] 1. When an animal, etc. comes into contact with a pasture fence connected to the output terminal, a high voltage is supplied from a high voltage generating circuit between the output terminal and the ground terminal to prevent the animal, etc. from escaping or entering. In this case, the high voltage generating circuit is connected to the power supply in an ungrounded state, and the first and second drive switches are connected to the output terminal and the ground terminal.
An electric fence characterized in that the output terminals are connected to each other via a normally closed contact, the output terminal is connected to a detection circuit via a normally closed contact of the drive switch, and the drive switch is actuated by the detection output. Device. 2. The electric fencing device according to claim 1, further comprising a timer comprising a capacitor that maintains the operation of the drive switch for a certain period of time.