CN112285436A

CN112285436A - Radiation detection system for electronic component

Info

Publication number: CN112285436A
Application number: CN202011235212.XA
Authority: CN
Inventors: 肖旭辉; 曹培福
Original assignee: Hunan Foking Electronics Co ltd
Current assignee: Hunan Foking Electronics Co ltd
Priority date: 2020-11-08
Filing date: 2020-11-08
Publication date: 2021-01-29

Abstract

The invention provides a radiation detection system for an electronic element, which comprises a first transistor, an inductance coil, a transistor and the inductance coil, wherein one end of the inductance coil is connected with a first variable resistor, one end of the first variable resistor is connected with one end of the first resistor, the other end of the first resistor is sequentially connected with one end of a second resistor, a fourth resistor, a fifth resistor, an emitter of a third transistor and one end of a third capacitor and then connected with one end of a switch button, the other end of the switch button is connected with one end of a power supply, and the other end of the power supply is sequentially connected with the other end of the third capacitor, a light-emitting diode, a sixth resistor, an emitter of the second transistor and the first transistor and then connected with the first variable resistor.

Description

Radiation detection system for electronic component

Technical Field

The present invention relates to the field of electronic device technologies, and in particular, to a radiation detection system for an electronic device.

Background

Electromagnetic radiation is radiation generated to the surrounding space by electromagnetic waves generated by alternating electric and magnetic fields. Because of the low energy of such radiation, no ionization of the surrounding matter can be caused. Strictly speaking, all electrical appliances (including household electrical appliances) generate electromagnetic radiation, but what really causes environmental pollution and affects human health are high-power communication equipment, such as radar, television and broadcast transmitting devices, industrial microwave heaters (household microwave ovens may also have electromagnetic radiation leakage), radio frequency induction and medium heating equipment, high-voltage power transmission and transformation devices, electromagnetic medical and diagnostic equipment and the like. Because of the different nature of radiation, the mechanism by which it acts on the human body is also different from ionizing radiation. Electromagnetic radiation is divided by a near field and a far field, which are divided by the distance of one wavelength. The electromagnetic field intensity of the near field is much greater than that of the far field, and is therefore the focus of monitoring and protection.

Disclosure of Invention

It is an object of the present invention to overcome the deficiencies of the prior art and to provide a radiation detection system for electronic components.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: a radiation detection system for electronic elements comprises a first transistor, an inductance coil, a transistor and the inductance coil, wherein one end of the inductance coil is connected with a first variable resistor, one end of the first variable resistor is connected with one end of a first resistor, the other end of the first resistor is sequentially connected with a second resistor, a fourth resistor, a fifth resistor, an emitter of a third transistor and one end of a third capacitor, and then is connected with one end of a switch button, the other end of the switch button is connected with one end of a power supply, and the other end of the power supply is sequentially connected with the other end of the third capacitor, a light emitting diode, a sixth resistor, an emitter of the second transistor and the first transistor, and then is connected with the first variable resistor.

The first transistor is connected with the second resistor and the first capacitor, the first capacitor is respectively connected with the base electrodes of the third resistor and the second transistor, the collector electrode of the second transistor is respectively connected with the other end of the third resistor, the other end of the fourth resistor and one end of the second capacitor, the other end of the second capacitor is respectively connected with the other end of the fifth resistor, the base electrode of the third transistor and one end of the second variable resistor, the other end of the second variable resistor is connected with the other end of the sixth resistor, and the collector electrode of the third transistor is connected with the light emitting diode.

After installation, the present invention first places the detector at a location remote from the lighting line or higher voltage line (e.g., the center of a room). After checking that the mounting direction of the transistor and the light emitting diode is correct, AJ1 is rotated clockwise until the voltage reaches 9V and the indicator lights up. Prior to adjustment, button P1 is temporarily soldered using an electric iron. Otherwise the button is held down all the time during the adjustment. Adjusting AJ2 in both forward and reverse directions starts from the light-emitting diode lighting state and ends in the light-off state. Once the leds are off, AJ2 has been adjusted in place and is not adjusted again. When AJ1 is adjusted, the detector should be close (a few centimeters) to the radiation source (e.g., wall-mounted power outlet, television, HI-FI device, etc.). Radiation detection can then be performed.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings, in which preferred embodiments of the invention are: referring to fig. 1, a radiation detection system for an electronic component according to this embodiment includes a first transistor T1, an inductor L1, a transistor T2, and an inductor L1, wherein one end of the inductor L1 is connected to a first variable resistor AJ1, one end of the first variable resistor AJ1 is connected to one end of a first resistor R1, the other end of the first resistor R1 is connected to one end of a second resistor R2, a fourth resistor R4, a fifth resistor R5, an emitter of a third transistor T3, and one end of a third capacitor C3 in sequence and then connected to one end of a switch button P1, the other end of the switch button P1 is connected to one end of a power supply BAT1, and the other end of the power supply BAT1 is connected to the other end of the third capacitor C3, a light emitting diode D1, the sixth resistor R6, an emitter of the second transistor T2, and the first transistor T1 and then connected to the first variable resistor AJ 1.

The first transistor T1 is connected to the second resistor R2 and the first capacitor C1, the first capacitor C1 is connected to the bases of the third resistor R3 and the second transistor T2, the collector of the second transistor T2 is connected to the other end of the third resistor R3, the other end of the fourth resistor R4 and one end of the second capacitor C2, the other end of the second capacitor C2 is connected to the other end of the fifth resistor R5, the base of the third transistor T3 and one end of the second variable resistor AJ2, the other end of the second variable resistor AJ2 is connected to the other end of the sixth resistor R6, and the collector of the third transistor T3 is connected to the light emitting diode D1.

The sensor used in the detector is an inductor (L1) connected to a field effect transistor (T1). T1 is polarized at the beginning of its conductive region by a series connection of a fixed resistor (R1) and a variable resistor (AJ 1). The amplified electromotive force generated in L1 will appear on the drain of T1. The amplified signal present at the terminal pin of the resistor R2 is fed via the capacitor C1 to a second amplification stage arranged at the common emitter established around the NPN transistor T2. The amplitude of the signal present at the collector of T2 depends of course on the intensity of the surrounding radiation; if tested with an oscilloscope, a voltage waveform of over 100mV can be seen at the collector of T2. The capacitor C2 is a coupling capacitor, which sends the amplified signal of T2 to T3 and also plays a role of dc blocking.

The base of T3 is biased by fixed resistors R5, R6 and variable resistor AJ 2. Adjusting AJ2 allows T3 to reach the radiationless cutoff point, extinguishing led D1 in the collector circuit. When the radiation reaches a certain intensity, the negative half wave of the output signal of T2 will turn on T3, thereby illuminating led D1. Resistor R7 may limit the current through led D1. Since the detector is only used to determine the radiation contamination range, a simple switch button (P1) is provided. The capacitor C3 is used for filtering the power supply (BAT 1).

After installation, the detector is first placed at a location remote from the lighting line or higher voltage line (e.g., the center of the room). After checking that the mounting direction of the transistor and the light emitting diode is correct, AJ1 is rotated clockwise until the voltage reaches 9V and the indicator lights up. Prior to adjustment, button P1 is temporarily soldered using an electric iron. Otherwise the button is held down all the time during the adjustment. Adjusting AJ2 in both forward and reverse directions starts from the light-emitting diode lighting state and ends in the light-off state. Once the leds are extinguished, AJ2 has been adjusted into position. Do not need to be readjusted. AJ1 was adjusted. The detector should be close (a few centimeters away) to the radiation source (e.g., wall-mounted power outlet, television, HI-FI device, etc.). In the case of rotating AJ1 in a counterclockwise direction, the more the detector is closer to the radiation source when tuned to a particular position, the more easily the LEDs are lit, the more easily the detector is moved gradually closer to the radiation source, and the further the detector is moved to the position where D1 starts to emit light; the detector was then moved incrementally away until D1 no longer continued to emit light. If transistor T1 continues to conduct, it indicates that AJ1 has not been adjusted. The AJ1 is not easily aligned at one time, but can be adjusted in position by repeating the process several times. The detector can be tried after alignment AJl. The trial result shows that the user only needs to leave the video equipment or the computer screen for more than 1 m. The electronic alarm clock is separated by more than 40cm and separated by more than 20cm from a power line of the bedside lamp, so that the electronic alarm clock is not damaged by electromagnetic radiation. You will also find it. The grounded metal shield has a surprising radiation protection effect, and the external radiation quantity of shielded equipment is close to zero. The detector can also detect whether the switch on the socket board or the wiring board pulled out from the power line is turned off or not. In any case, you will find its new use at any time.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A radiation detection system for an electronic component, characterized by: the LED driving circuit comprises a first transistor (T1), an inductance coil (L1), a transistor (T2) and an inductance coil (L1), wherein one end of the inductance coil (L1) is connected with a first variable resistor (AJ 1), one end of a first variable resistor (AJ 1) is connected with one end of a first resistor (R1), the other end of the first resistor (R1) is sequentially connected with a second resistor (R2), a fourth resistor (R4), a fifth resistor (R5), an emitter of a third transistor (T3), one end of a third capacitor (C3) is connected with one end of a switch button (P1), the other end of the switch button (P1) is connected with one end of a power supply (BAT 1), the other end of the power supply (BAT 1) is sequentially connected with the other end of a third capacitor (C3), a light emitting diode (D1), a sixth resistor (R6), an emitter of a second transistor (T2) and an emitter of the first variable resistor (T1) is connected with a first variable resistor (AJ 1).

2. A radiation detection system for an electronic component according to claim 1, wherein: the first transistor (T1) is connected with the second resistor (R2) and the first capacitor (C1), the first capacitor (C1) is respectively connected with the third resistor (R3) and the base of the second transistor (T2), the collector of the second transistor (T2) is respectively connected with the other end of the third resistor (R3), the other end of the fourth resistor (R4) and one end of the second capacitor (C2), the other end of the second capacitor (C2) is respectively connected with the other end of the fifth resistor (R5), the base of the third transistor (T3) and one end of the second variable resistor (AJ 2), the other end of the second variable resistor (AJ 2) is connected with the other end of the sixth resistor (R6), and the collector of the third transistor (T3) is connected with the light-emitting diode (D1).