JPH0316063Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a voltage detection rod for detecting current flowing through overhead wires, etc. prior to power outage work.

2. Description of the Related Art Conventionally, a voltage detection rod has been used to check whether a test object such as an overhead wire installed at a high place is energized. The tip of this voltage detection rod is brought into contact with the subject, and a neon tube is lit by an induced current caused by the current flowing through the subject, thereby indicating whether the subject is energized.

However, such conventional voltage detection rods have a problem in that the lighting of the neon tube is difficult to see in broad daylight, and there is a risk of misjudgment.

The present invention was developed by focusing on the above-mentioned problems with conventional voltage detection rods, and detects the current flowing through the test object and displays this by sequentially blinking light emitting diodes arranged in a ring. The purpose is to provide a voltage detection stick that can be easily checked even in broad daylight.

Embodiments of the present invention will be described below with reference to the figures. The insulating operating rod 1 is made up of a plurality of component rods 1a, 1b, . . . that can be connected to and separated from each other, and is expandable and retractable.

The tip of the operating rod 1 has a contact 2 that protrudes laterally.
is provided.

A voltage detecting section 3 is provided at the bottom of the contact 2. A control circuit, which will be described later, is built into the voltage detecting section 3. The voltage detecting unit 3 has a disk shape extending outward from the operating rod 1, and on its lower surface, a plurality of photoelectric elements 4 that blink when detecting the energization of the subject 0 are arranged in a ring shape, and a power source A switch 5 is provided.
The blinking of the photoelectric element 4 can be easily confirmed from below the operating rod 1.

A housing section 7 for a dry cell battery 6 serving as a DC power source for operating the voltage detection section 3 is provided at the lower part of the voltage detection section 3 .

Reference numeral 8 denotes a terminal provided in the middle of the operating rod 1, and when a predetermined voltage is applied between this terminal and the contactor 2, the light emitting diode 4 blinks, indicating a state similar to that when the energized state of the subject is detected. It is constructed as follows and is used to check the operation of this voltage detection rod.

In the voltage detection section 2, there is a neon tube 9 that emits light due to the induced current caused by the current flowing through the subject.
A photoelectric element 10 generates a voltage by sensing the light emitted from the neon tube 9, and receives the voltage of this photoelectric element 10 as a trigger pulse, and also receives a timing pulse from a timing pulse oscillation circuit 11 to generate a light emitting diode drive pulse. It includes a drive pulse generation circuit 12 and a driver circuit 13 that receives the drive pulses, amplifies them, and causes the light emitting diodes 4 to blink in sequence.

Next, the effect will be explained. When the power switch 5 is turned on, all the light emitting diodes 4 turn on, indicating that measurement preparation is complete. The measurement is carried out on an object to be measured such as an overhead wire.
This is done by multiplying contact 2 by . If a current flows through the subject 0, the neon tube 9 lights up due to the induced current caused by this current, this is sensed by the photoelectric element 10, and a trigger pulse is sent from the photoelectric element 10 to the light emitting diode drive pulse generation circuit 12. send to On the other hand, timing pulses are sent from the timing pulse oscillation circuit 11 to the drive pulse generation circuit 12. The drive pulse generation circuit 12 receives these and generates a drive pulse, and this drive pulse is sent to the driver circuit 13. The driver circuit 13 amplifies the drive pulse, causes the light emitting diodes 4 to blink in sequence, and displays the energization state of the subject 0. The blinking of the light emitting diode 4 can be easily confirmed even in broad daylight, and it can be ensured that there is no error in the determination.

As explained above, the present invention includes a stretchable insulating operating rod 1, a contact 2 protruding from its tip, a voltage detecting section 3 provided at its lower part,
DC power supply housing section 7 for operating the voltage detection section 3
and a plurality of light emitting diodes 4 arranged in a ring at easy-to-see positions on the operating rod 1. , a photoelectric element 10 that senses the light emission of the neon tube 9 and generates a voltage, and a drive that receives the voltage of the photoelectric element 10 as a trigger pulse and receives a timing pulse from a timing pulse oscillation circuit 11 to generate a light emitting diode drive pulse. Since the configuration includes a pulse generation circuit 12 and a driver circuit 13 that receives a drive pulse from the drive pulse generation circuit 12, amplifies it, and causes the light emitting diodes 4 to blink in sequence, the light emitting diode 4 blinks will cause no damage to the light emitting diode 4. Since the energization state of sample 0 is clearly shown, the energization display can be clearly confirmed even in broad daylight on a clear day, and work safety can be ensured. Also, since the overall structure and circuit configuration are simple, it is strong and hard to break. Further, it has the effect that the voltage detection work can be performed extremely simply by simply hooking the contactor 2 onto the subject 0.

[Brief explanation of the drawing]

Figure 1 is a front view of a part of the voltage detection rod, and Figure 2 is a partial front view of the voltage detection rod.
FIG. 3 is a circuit diagram showing the circuit configuration of the voltage detecting section, and FIG. 4 is a front view of the device in use. 1... Operating rod, 2... Contact, 3... Voltage detection section,
4...Light emitting diode, 7...Power supply housing part, 9...
... Neon tube, 10 ... Photoelectric element, 11 ... Timing pulse oscillation circuit, 12 ... Drive pulse generation circuit, 13 ... Driver circuit.

Claims (1)

[Scope of utility model registration request] An extendable and retractable insulating operating rod, a contact protruding from the tip thereof, a voltage detecting section provided at the bottom thereof, a DC power supply accommodation section for operating the voltage detecting section, and the operating rod. A plurality of light emitting diodes are arranged in an annular manner so as to protrude annularly from the outer periphery of the body and can be visually observed from the proximal end side. , a photoelectric element that senses the light emitted from the neon tube and generates a voltage, and a drive pulse generation circuit that receives the voltage of this photoelectric element as a trigger pulse and receives a timing pulse from another timing pulse oscillation circuit to generate a light emitting diode drive pulse. and a driver circuit that receives the drive pulse, amplifies it, and sequentially blinks the light emitting diode so as to rotate it.