JPS58147669A - Electric field system human body detector - Google Patents

Abstract

PURPOSE:To enable easy changing of an installing place, by a method wherein a power surce part, an oscillating circuit, a resonating circuit, and a detecting circuit are housed in a single receptacle, and are secured to the receptacle in a manner to electrically connect a conductive rod, forming a detecting line, to the resonating circuit and detecting circuit. CONSTITUTION:In a receptacle 5, a portable power source part 6 such as battery power source, a high-frequency oscillating circuit 7, a resonating circuit 8 which has a resonating frequency of f0 and boosts an amplitude to 10-20 times, a conductor rod 9 connected to the output of the circuit 8 and a detecting circuit 10, and a display meter M for displaying a detecting state by means of the output of the detector 10. If a human body approaches the conductor rod 9, an electrostatic capacity C0 between the rod 9 and an earth changes slightly, and an amplitude of a frequency signal f0 applied to the rod 9 fluctuates according to the change in the capacity. Only a frequency f1, being produced when the human body approaches and being within the fluctuations in the amplitude of the frequency signal f0, is detected by the circuit to perceive approaching of the human body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable electric field type human body detector.

As an electric field type 4-body detector, 4! As shown in Figure 1, there was a round type with detection wires (3) erected at regular intervals and installed through insulated blocks (2) on the nine pillars (1). However, such electric field type human body detectors have the disadvantage that the construction of the detection wire (3) is very troublesome and the detector body (4) cannot be easily carried.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide an electric field type human body detector that does not require installing a detection wire on a support and is portable.

The present invention will be explained below by way of an embodiment.0 Fig. 2 shows a circuit configuration diagram of one embodiment, and the circuit surrounded by the broken line in the figure is incorporated into the container (6) which is the main body of the detector shown in Fig. 3. It is of good quality and can be freely transported together with the container (I), (6)
is a portable power source such as a battery power source. Also (7
) is an oscillation circuit, and this oscillation circuit (7) outputs an oscillation output of high frequency (for example, to':=10KHz), and (8) is a resonant circuit, which has a resonant frequency of fo.
It boosts the amplitude of the frequency signal t-10 to 20 times, and its output is connected to a conductor rod (IIK
Apply. This conductor $ +91 has a static capacitance C- of the ground, and when a human body approaches it, the capacitance CI
changes slightly, and if the amount of change at that time is , then the amplitude of the frequency signal applied to the conductor rod (9) changes due to the capacitance change ΔC. The detection circuit senses the approach of a human body by detecting only the frequency f+ that occurs when the human body approaches the conductor rod +1) in the amplitude fluctuation of the frequency signal f. M is the output of the detection circuit, which is a display meter that indicates the detection state. FIG. 3 shows a perspective view of an embodiment of the present invention, in which a display meter M is superimposed on the front of the container made of an insulating material such as a resin molded product, and a power supply section (@ ) is equipped with a power switch (1 and 1) and a display light a 旙 to indicate power on, and a volume knob for sensitivity adjustment is provided below the meter M.
*Can be worn freely. At the center of the upper surface of the container (5), fixing means for supporting and fixing the conductor rod (9) as shown in FIG. 4 is provided. That is, the upper surface of the container +6+ is provided with a recess (11) having a hole Q4 in the center, and a bottomed cylindrical end for inserting the conductor rod (9) into the hole (I4). The outer flange (lη) at the upper end of the cylindrical body (l) is fixed to the opening periphery of the hole (l) to fix the cylindrical body end. Screw the threaded part (lI) formed in the lower diameter part of the conductor rod (9) into the barrel, and tighten the nut from the outer bottom side of the cylinder (14) to fix the conductor rod (9), which will serve as the detection wire. ) is vertically supported and fixed.A terminal metal fitting υ is welded and fixed to the bottom outer periphery of the cylindrical end and is also glued with a nut, and is simultaneously supported and fixed to the conductor rod (9). , conductor rods (9) are electrically connected to the output end/input end of the resonant circuit (8) built into the container (6) and the detection circuit through the leads soldered to the terminal fittings. Therefore, the detection area in the embodiment is formed around the conductor rod (9) as shown by the broken line in Fig. 3. In this embodiment, a cylindrical insertion portion W with a bottom is provided in the container (6), and both sides of the insertion portion W are shown. Open the
Insertion 5 (21 placed on both sides, 9 pcs.)

The contact pieces 1 each having spring elasticity attached to the board @4@ face the insertion part A from the entrance part, and the conductor rod (9) carrying the detection wire passes through the hole 04 into the insertion part ( When the conductor rod (9) is inserted into the interior, the lower both sides of the conductor rod (9) are bonded from both sides with the contact piece (c), and an electrical connection is established when the conductor rod (9) is mechanically supported and fixed. ing. The contact pieces are electrically connected to the output ends of the nine resonance circuits (8) and the input ends of the detection circuits, and the conductor rods (9) are attached to the respective printed circuit boards (241). Electrical connections are made to these circuits.Those in the figure (to) are tapped screws for fixing the printed circuit board.

In the above example, nine conductor rods (9) serving as detection wires are vertically erected, but they are supported and fixed horizontally as shown in FIG. A horizontal detection area may be formed. In this case, a conductor rod (9
) is fixed at the upper end of the column, for example, 1.5 m above the container (6), with the central part supported by a support made of an insulator with a C-shaped round cross section. The lower end of the pillar is a container (6)
The electrical connection between the conductor rod (9) and the resonant circuit (8) and the detection circuit inside the container (6) is made by fixing it upright at the center of the upper surface with a screw connection. ) via a lead wire whose one end is connected to a terminal fitting provided on the outer surface of the Of course, the terminal fittings @ are commonly connected within the container (6) to the output end of the resonant circuit (8) and the input ends of the detection circuit box.

By the way, in the above embodiment, since the detection area is determined by one conductor rod (3), a large number of electric field type human body detectors are required to form a wide area. In this case, only one power supply section (6), oscillation circuit (7), and display section such as the display meter M can be used.

That is, the common block A is constructed by incorporating a power supply unit (6), an oscillation circuit (7), and a display meter M in one container (51), and also includes a resonant circuit (8) and a resonant circuit (8) in the container (51). The detection circuit (with IC1 built in) is connected to the conductor rod (9) as shown in Figure 8.
are supported and fixed to form nine repeaters B, and the resonance circuit (8) of each repeater B connects the input end to the oscillation circuit (7) on the common block side.
) to the output end of the sensor via the cable cIυ, and connect the output end of each detection circuit to the display meter Mli via the cable@
It is connected via Therefore this! If the oscillation circuit (
Since repeaters B do not interfere with each other,
Moreover, since the repeater B is self-supporting, it can be easily moved and installed, and the detection area can be expanded using the conductor rod (9). □The station power supply 5 (6) supplies power to each repeater B via a cable.

Further, an alarm buzzer may be provided for each repeater B so that each repeater B can be notified separately.

The present invention houses a power supply section, an oscillation circuit, a resonance circuit, and a detection circuit in one container, and a conductor rod constituting a detection wire is electrically connected to the resonance circuit and detection circuit installed in the container. Since it is fixed to the container, there is no need to install a detection wire like in the past, and the container can stand up on its own along with the conductor rod that serves as the detection wire, so it can be installed anywhere and is extremely easy to move. As a result, special construction is required! It has the effect of eliminating the need for construction costs, and has the effect of being able to set the detection area to the desired location because it can be installed anywhere.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional example, FIG. 2 is a circuit diagram of an embodiment of the present invention, FIG. 3 is a perspective view of the same, FIG. 4 is an enlarged sectional view of the fixing means, and FIG. The figure is an enlarged sectional view showing the other side of the fixing means, FIG. 6 is a perspective view of another embodiment of the present invention, FIG. 7 is a circuit configuration diagram of the applied example of the above, and FIG. It is a perspective view showing the arrangement configuration, with +6) a Vi container, (6) a power supply section, (7) an oscillation circuit, (8) a resonance circuit, (9) a conductor bar, and tlol a detection circuit. Person Patent Attorney Ishi 1) Chief 71

Claims (1)

[Claims] 1) One power supply section, oscillation circuit, resonance circuit, and detection circuit 06
The conductor rod that constitutes the detection wire is housed in the
An electric field type human body detector 0 characterized in that it is electrically connected to a resonant circuit and a detection circuit and fixed to a container in good condition.2) A conductor rod is attached to the fixing means on the upper surface of the container. 3) The electric field type human body detector according to claim 8, item 1, characterized in that, when fixed, the conductor rod is electrically formed into a resonant circuit and a detection circuit. Electric field type human body detector 0 according to claim 1 or 112, which is electrically and mechanically connected and fixed by being inserted into the substantially central part of the upper surface.