KR100301184B1 - Hand-held electromagnetic wave measuring apparatus - Google Patents

Abstract

PURPOSE: A hand-held electromagnetic wave measuring apparatus is provided to be capable of confirming how much electromagnetic wave is detected at a specific place. CONSTITUTION: An oscillation means(140) comprises a resistor(R1) and a capacitor(C1) connected in parallel, and generates a clock signal of a predetermined period to output the clock signal to an analog-to-digital converter(110). A constant voltage circuit(150) receives the clock signal generated from the oscillation means(140) to supply a constant voltage (-5V) to the analog-to-digital converter(130). A battery(160) supplies a DC operating voltage. A battery charging level detecting means(170) detects a charged level of the battery so as to be displayed by a display means(104). A detected electromagnetic signal is converted into a digital signal by the analog-to-digital converter(130), and an integrator circuit(180) receives and integrates the converted signal from the converter(130).

Description

Portable electromagnetic wave measuring device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave measuring apparatus, and more particularly, to a portable electromagnetic wave measuring apparatus which a user can carry and measure electromagnetic waves at a specific position (or place).

Typically, in the public places, hospitals, factories, or offices where electrical appliances or electrical equipment of general households are installed, various kinds of electromagnetic waves are generated from these electrical appliances or electrical facilities.

The electromagnetic waves generated in this way may cause malfunctions of precision electronic measuring equipment or diagnostic equipment for treating patients, and when exposed to the human body for a long time, may cause brain cancer, leukemia, birth defects or miscarriage. Recently, research on the effects of electromagnetic waves on the human body.

A conventional electromagnetic wave measuring device for measuring electromagnetic waves of this kind is disclosed in Japanese Patent Laid-Open No. 63-238569. In the electromagnetic wave measuring apparatus disclosed in the publication, as shown in Fig. 1, the pulse oscillation signal output from the oscillator 1 is input to the synchronous detector 2 and the local oscillation control circuit 3. The local oscillation control circuit 3 receives the pulse oscillation signal output from the oscillator 1, controls the local oscillator 4, oscillates intermittently in the local oscillator 4, and locally oscillates the oscillation by the pulse width. Is output to the mixer (5).

At this time, when the continuous wave is received from the antenna 5 and output to the mixer 5, the mixer 5 is an intermediate frequency between the electromagnetic wave input from the antenna 6 and the local oscillation signal output from the mixer 5; The signal is modulated and amplified by the amplifier 7. The intermediate frequency signal amplified by the amplifier 7 is shaped by the waveform shaping circuit 8 and output to the synchronous detection circuit 2.

The synchronous detection circuit 2 compares a signal wave having a well-formed waveform with a pulse signal output from the oscillator 1 and outputs only the matching signal to the drive circuit 9 when the signal wave is matched with each other. Is configured to output a signal for driving the buzzer 10 and the indicator light 11 to alert or inform that electromagnetic waves are detected.

By the way, the electromagnetic wave detection device configured as described above can alarm that the electromagnetic wave is detected by the buzzer 10 or the indicator 11, but it is not convenient to use because it does not know how much electromagnetic wave is detected. There are various problems such as being fixed and not portable.

Accordingly, an object of the present invention is to provide a portable electromagnetic wave measuring device capable of knowing how much electromagnetic waves are detected at a specific location.

Another object of the present invention is to provide a portable electromagnetic wave measuring device having a simple structure and easy to use.

Another object of the present invention is to provide a portable electromagnetic wave measuring device capable of reducing the manufacturing cost.

In order to achieve the above object, the present invention provides a main switch for controlling an operation, an illumination lamp installed at a lower left side of the main switch to emit light at night, and an electromagnetic wave detecting means for detecting electromagnetic waves when the main switch is switched on; Display means for numerically displaying the amount of electromagnetic waves detected by the electromagnetic wave detecting means, and converting the analog signal detected by the electromagnetic wave detecting means into a digital signal, and the amount of electromagnetic waves detected by the display means. 3 and 1/2 digit A / D converters for outputting vertical and horizontal drive signals to the display means for numerical display, and oscillating clock pulses of a predetermined period to output to the 3 and 1/2 digit A / D converters. Oscillation means and a power failure for receiving the oscillation signal of a predetermined period oscillated by the oscillation means and outputting a constant voltage (-5V) of a predetermined level to the 3 and 1/2 digit A / D converter A voltage charging circuit, a battery for supplying a DC operating power supply, a battery charge level detecting means for detecting the charge level charged in the battery to be displayed on the display means, and an electromagnetic wave signal detected by the electromagnetic wave detecting means. And an integral circuit for receiving a signal converted into a digital signal from a 1/2 digit A / D converter and integrating the display means into a decimal number.

1 is a view schematically showing a conventional electromagnetic wave measuring device,

2 is an external perspective view of a portable electromagnetic wave measuring device according to an embodiment of the present invention;

3 is a block diagram of a portable electromagnetic wave measuring device according to an embodiment of the present invention;

Figure 4 is a detailed circuit diagram of the electromagnetic wave detection means applied to the portable electromagnetic wave measuring apparatus according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100: front case 102: rear case

104: display means 106: main switch

120: electromagnetic wave detection means 121: receiving antenna

122: first filter unit 123: buffer

124: second filter unit 125: first amplifier unit

125a: amplifier 126: third filter section

127: second amplifier 127a: amplifier

128: detector 129: RC filter

130: 3 and 1/2 digit A / D converter 140: Oscillating means

150: constant voltage circuit 152: first comparator

154: voltage level selector 160: battery

170: battery charge level detection means 180: integrating circuit

Hereinafter, a portable electromagnetic wave measuring apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is an external perspective view of a portable electromagnetic wave measuring apparatus according to an embodiment of the present invention, Figure 3 is a circuit block diagram of a portable electromagnetic wave measuring apparatus according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention Fig. 1 is a detailed circuit diagram of the electromagnetic wave detecting means applied to the portable electromagnetic wave measuring device.

As shown in FIG. 2, in the portable electromagnetic wave measuring apparatus according to the exemplary embodiment of the present invention, the upper portion has a circular shape, and the lower portion has a rectangular front casing 100 having a substantially same shape, and the front casing 100. A display means 104 made of a rear casing 102 coupled to a rear side of the rear casing, a 7 segment or a liquid crystal display in a circular portion formed on the front and rear casings 100 and 102, and the front casing 100. The main switch 106 is disposed near the front center of the front and controls the operation, and is provided in the lower left of the main switch 106, the illumination lamp 108 for emitting light at night.

In addition, a wave-shaped bent portion 107 is formed at the front and back of the casing 100 and 102 so as to be easily carried.

In the above description, the external structure or shape of the portable electromagnetic wave measuring apparatus according to an embodiment of the present invention has been described. However, the present invention is not limited thereto, for example, as in a typical portable small transistor radio or a portable cassette. Of course, the appearance can also be changed.

As shown in FIG. 3, the portable electromagnetic wave measuring apparatus according to an embodiment of the present invention displays the electromagnetic wave detection means 120 for detecting electromagnetic waves and the amount of electromagnetic waves detected by the electromagnetic wave detection means 120 in numerical values. The display means to convert the analog signal detected by the electromagnetic wave detection means 120 into a digital signal and simultaneously display the detected amount of electromagnetic waves on the display means 104 in numerical values. The 104 and 3 and 1/2 digit A / D converters 130 output vertical and horizontal drive signals.

In addition, in the portable electromagnetic wave measuring apparatus according to an embodiment of the present invention, the resistor R1 and the capacitor C1 are connected in parallel to oscillate a clock pulse of a predetermined period so that the 3 and 1/2 digit A / D converters 110 may be used. The oscillation means 140 output to the oscillation means, and the oscillation signal of the oscillation means oscillated by the oscillation means 140 to receive a constant voltage (-5V) of a predetermined level to the 3 and 1/2 digit A / D converter 130. Battery charge level detection means for detecting the output voltage output circuit 150, the battery 160 for supplying DC operating power, and the charge level charged in the battery 160 to display on the display means 104 ( 170 and a signal converted from the 3 and 1/2 digit A / D converter 130 into a digital signal by receiving the electromagnetic wave signal detected by the electromagnetic wave detecting means 120, the decimal number is displayed on the display means 104. It is composed of an integrating circuit 180 that integrates so as to be represented by.

The constant voltage circuit 150 receives a first oscillation signal of the oscillation means 140 and outputs a DC voltage of ± 5V compared with the ground power source, and the first comparator 152 Bypass the capacitor (C2) and the + 5V of the DC voltage of ± 5V filtered by the pulse component in the capacitor (C2) to filter the pulse component contained in the DC voltage of ± 5V output from the), The voltage level selector 154 outputs only a voltage of −5 V to the 3 and 1/2 digit A / D converters 130.

The voltage level selector 154 includes a diode D1 for bypassing + 5V out of the DC voltage of ± 5V filtered by the capacitor C2 to ground, and is serially connected to the diode D1 in a forward direction. The diode D2 outputting only the voltage of -5V filtered at C2 to the 3 and 1/2 digit A / D converters 130, and the capacitor C3 connected in parallel to the diodes D1 and D2. It consists of).

The electromagnetic wave signal detected by the electromagnetic wave detecting means 120 receives a signal converted into a digital signal by the 3 and 1/2 digit A / D converter 130 and integrates the digital signal to display it on the display means 104 in decimal. The integrating circuit 180 is composed of capacitors C4 and C5 connected in parallel to the resistor R2 and the resistor R2, respectively.

As shown in FIG. 4, the electromagnetic wave detecting means 120 includes an antenna 121 for receiving electromagnetic waves, a first filter unit 122 for filtering noise included in the electromagnetic waves received from the antenna 121, A buffer 123 that bypasses the electromagnetic wave filtered by the noise in the first filter unit 122, a second filter unit 124 that receives the electromagnetic wave signal output from the buffer 123 and filters the pulse flow component; The first amplifier 125 receives and integrates and amplifies the electromagnetic wave signal from which the pulse wave component is filtered by the second filter unit 124, and the pulse stream included in the electromagnetic wave amplified by the first amplifier 125. A third filter unit 126 for re-filtering, the third filter unit 126, a second amplifier unit 127 for receiving and amplifying the electromagnetic wave signal from which the pulse flow is again filtered by the third filter unit 126, and A capacitor C receiving the electromagnetic wave signal amplified by the second amplifier 127 and filtering the pulse stream 10) and a detector 128 which detects and outputs a positive electromagnetic signal of the amplified electromagnetic wave signal in which the pulses are filtered by the capacitor C10, and a positive electromagnetic wave output from the detector 128. RC filter section 129 for filtering the included noise.

The first filter unit 122 is a capacitor (C6) for filtering the pulse included in the electromagnetic wave received from the antenna 121 to the non-inverting terminal (+) of the buffer 123, and the buffer 123 It is composed of resistors (R3, R4) connected in parallel to each other to apply a reference voltage to the inverting terminal (-) of the (), the second filter unit 124 receives the electromagnetic wave signal output from the buffer 123 pulse A capacitor C7 for filtering components and resistors R15 and R16 for outputting electromagnetic waves filtered by the pulsating components in the capacitor C7, the first amplifier 125 is the second filter unit. The amplifier 125a for receiving and amplifying the electromagnetic wave signal filtered by the pulse component at 124, the resistors R5 and R8 for setting the amplification ratio of the amplifier 125a, and the inverting terminals of the amplifier 125a. A resistor (R6, R7) for inputting a voltage and the resistor (R8) to set an integral constant with the resistor (R5) It consists of the connected capacitor (C8).

In addition, the third filter unit 126 may include a capacitor C9 for filtering a pulse flow component included in the amplified electromagnetic wave signal output from the first amplifier 125, and a pulse flow component in the capacitor C9. Resistor (R9, R10) for outputting the filtered electromagnetic wave to the second amplifier 127, the second amplifier 127 is the electromagnetic wave in which the ripple component is filtered by the third filter unit 126 And an amplifier 127a for receiving and amplifying a signal, a resistor R13 for setting an amplification rate of the amplifier 127a, and a variable resistor VR1, and the detector 128 includes the second amplifier ( The diode D1 outputs only a positive signal among the amplified electromagnetic wave signals output from the 127, and one side is connected to the front end of the diode D1, and the other side is grounded so that the second amplifier 127 Bypass only negative signals from the output amplified electromagnetic signals to ground. Comprising a diode (D2), the RC filter 129 is a capacitor (C11) for filtering the pulsating component contained in the positive electromagnetic signal output from the detector 128, and the capacitor ( It consists of the resistor 14 connected in parallel with C11).

Next, a portable electromagnetic wave detection apparatus according to an embodiment of the present invention configured as described above will be described.

First, the portable electromagnetic wave measuring apparatus of the present invention is placed in a place or position where electromagnetic waves are to be measured, and then the main switch 106 is switched on, and the power charged in the battery 160 is 3 and 1/2 digit A /. It is applied to the D converter 130 to supply to each component that requires the operating power.

At this time, the oscillating means 140 composed of a resistor R1 and a capacitor C1 oscillates a pulse of a predetermined period and applies it to the 3 and 1/2 digit A / D converters 130 and at the same time, the constant voltage circuit ( It is applied to the first comparator 152 of 150 to output a DC voltage of ± 5V compared to the ground power supply (zero potential) in the first comparator 152, and ± 5V output of the first comparator 152 The pulsating component included in the DC voltage is filtered by the capacitor C2, and then + 5V of the ± 5V DC voltage is bypassed to the ground through the diode D1, and only a voltage of -5V (-Vcc) is applied to the diode ( And outputs the 3 and 1/2 digit A / D converter 130 through D2). Accordingly, the 3 and 1/2 digit A / D converter 130 supplies the necessary voltage of each component.

At the same time, when the electromagnetic wave is measured by the electromagnetic wave detection means 120 and output to the 3 and 1/2 digit A / D converter 130, the 3 and 1/2 digit A / D converter 130, the electromagnetic signal Converts the digital signal into a digital signal, and integrates the electromagnetic signal to the integrating circuit 180 to display the decimal number in the display means 104, and outputs vertical and horizontal driving signals to the display means 104. A quantity is displayed on the display means 104 in decimal.

3 and 4, the electromagnetic wave received from the antenna 121 is filtered through the buffer 123 by filtering noise included in the electromagnetic wave from the capacitor C6 of the first filter unit 122. It is output to the second filter unit 124, the capacitor (C7) of the second filter unit 124 again filter the noise (pulsation component) included in the electromagnetic wave and outputs to the first amplifier (125).

The first amplifier 125 receives the electromagnetic wave signal whose pulse flow component is filtered by the second filter unit 124 and amplifies the amplifier 125a at an amplification degree set by the resistors R5 and R8. The electromagnetic wave signal integrated and amplified by the integral constant set by R5 and the capacitor C8 is output to the third filter unit 126, and the third filter unit 126 outputs the first amplifier 125. The ripple component is filtered by the capacitor C9 after receiving the amplified electromagnetic wave signal from the amplifier, and then amplified by the amplifier 127a by an amplification degree determined by the resistor R13 and the variable resistor VR1 of the second amplifier 127. .

Next, the electromagnetic wave signal amplified by the second amplifier 127 is filtered by a pulse in the capacitor C10, and then detects a positive electromagnetic signal in the detector 128 so that the RC filter 129 The noise is filtered and then applied to the 3 and 1/2 digit A / D converter 130.

The 3 and 1/2 digit A / D converter 130 integrates the integrated circuit 180 to receive the electromagnetic wave signal filtered by the RC filter 129 and display it on the display means 104. That is, the integrating circuit 180 integrates the electromagnetic wave signal and converts the electromagnetic wave signal of the binary number into a decimal number so that the 3 and 1/2 digit A / D converters 130 are vertical and horizontal to the display means 104. Since the amount of electromagnetic waves detected by outputting the driving signal is displayed in decimal, not only how much electromagnetic waves are detected at a specific position, but also simply detecting the electromagnetic waves by the electromagnetic wave detecting means 120 and displaying means 104. Since the structure is simple and the structure is simple, the manufacturing cost can be down and it is very convenient to use.

While the portable electromagnetic wave measuring device of the present invention is operating, the battery charge level detecting unit 170 detects the amount of electricity charged in the battery 160 and inputs it to the 3 and 1/2 digit A / D converter 130. If the level is less than one, the display means 104 is displayed so that the user can take action.

In addition, since the lamp 108 is installed at the lower left of the main switch 106 at night, the light is emitted from the lamp 108 so that the electromagnetic waves displayed on the display means 104 can be easily read. have.

As described above, according to the portable electromagnetic wave measuring apparatus of the present invention, the electromagnetic wave detection means detects the electromagnetic wave and inputs it to the 3 and 1/2 digit A / D converter, and the 3 and 1/2 digit A / D converter provides the electromagnetic wave. It receives the signal, converts it into digital signal, and outputs the vertical and horizontal driving signals of the display means to display the electromagnetic wave signal data of the decimal number obtained by integrating in the integrator on the display means. Not only that, but also the structure is simple and the structure is simple, so that the manufacturing cost can be down and very convenient to use.

Claims (3)

A portable electromagnetic wave measuring device having a main switch for controlling the operation as a whole, a lamp for emitting light at night, a battery for supplying DC operating power, and a battery charge level detecting means for detecting to display the charge level charged in the battery. Electromagnetic wave detection means 120 for detecting electromagnetic waves when the main switch is switched on, display means 104 for numerically displaying the amount of electromagnetic waves detected by the electromagnetic wave detection means, and the electromagnetic wave detection means detected by the electromagnetic wave detection means. 3 and 1/2 digit A / D converters 130 for converting analog signals into digital signals and outputting vertical and horizontal drive signals to the display means to numerically display the detected amount of electromagnetic waves on the display means. And oscillating means 140 for connecting a resistor and a capacitor in parallel to oscillate a clock pulse of a predetermined period and outputting the clock pulses to the 3 and 1/2 digit A / D converters. A constant voltage circuit 150 which receives the oscillation signal of the oscillation means oscillated by the oscillation means and outputs a constant level constant voltage to the 3 and 1/2 digit A / D converters, and the electromagnetic wave signal detected by the electromagnetic wave detection means. And an integrating circuit (180) for receiving a signal converted from a 3 and 1/2 digit A / D converter into a digital signal and integrating the display means into a decimal number on the display means. The first voltage comparator 152 of claim 1, wherein the constant voltage circuit 150 receives an oscillation signal of a predetermined period generated by the oscillation means and outputs a DC voltage of ± 5V compared to a ground power source. The capacitor (C2) for filtering the pulse component contained in the DC voltage of ± 5V output from the comparator, and -5V of the DC voltage of ± 5V filtered by the pulse component from the capacitor bypasses to ground, and -5V And a voltage level selector (154) for outputting only voltage to the 3 and 1/2 digit A / D converters. The method of claim 1, wherein the electromagnetic wave detection means 120, an antenna 121 for receiving electromagnetic waves, a first filter unit 122 for filtering noise contained in the electromagnetic waves received from the antenna, and the first A buffer 123 for bypassing the electromagnetic wave filtered by the noise in the filter unit, a second filter unit 124 for filtering the pulse wave component by receiving the electromagnetic wave signal output from the buffer, and a pulse wave component in the second filter unit A first amplifier 125 for receiving and integrating and amplifying the filtered electromagnetic wave signal, a third filter unit 126 for re-filtering the pulse stream included in the electromagnetic wave amplified by the first amplifier, and the third A second amplifier 127 for receiving and amplifying the electromagnetic wave signal from which the pulse is filtered again by the filter unit, a capacitor C10 for receiving the electromagnetic wave signal amplified by the second amplifier, and filtering the pulse wave, and the capacitor C10; Amplified former filtered with pulses in Among the wave signals, a detector 128 for detecting and outputting a positive electromagnetic signal and an RC filter unit 129 for filtering noise contained in the positive electromagnetic wave output from the detector are included. Portable electromagnetic wave measuring device characterized in that.