CN202421347U

CN202421347U - Electromagnetic field detection module

Info

Publication number: CN202421347U
Application number: CN2012200448052U
Authority: CN
Inventors: 张爱萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-13
Filing date: 2012-02-13
Publication date: 2012-09-05
Anticipated expiration: 2022-02-13

Abstract

The utility model relates to an electromagnetic field detection module comprising an electromagnetic field pick-up circuit, a central processing unit, an RS485 communication interface circuit and an alarm circuit. The output terminal of the electromagnetic field pick-up circuit is connected with the input terminal of the central processing unit sequentially by virtue of an amplifier circuit and a level display circuit, and the output terminal of the central processing unit is connected with the input terminals of the RS485 communication interface circuit and the alarm circuit. In the electromagnetic field detection module, electromagnetic field radiation is detected by an induction pick-up coil, when a human body is close to a hazardous electromagnetic radiation area, signal collection and amplification treatments are carried out by an induction radiation detection circuit, the central processing unit judges and sends an alarm indication signal, the strength of the current electromagnetic field is displayed by a PC (personal computer), and a certain prompt alarm is given to remind people of paying attention to the harm of radiation on people so as to reasonably avoid radiation and achieve the purpose of protection.

Description

The electromagnetic field detection module

Technical field

The utility model belongs to the detection technique field, and what be specifically related to is a kind of electromagnetic field detection module.

Background technology

Along with the increase of consumer, all exist a large amount of electromagnetic radiation like televisor, computer, refrigerator, hair dryer etc., in work and daily life; If the long-time electromagnetic field radiation of accepting certain intensity of human body; Particularly work long hours and in the scope of high intensity magnetic field, work, can cause certain health hazard to our health, its mechanism of action mainly contains thermal effect, non-thermal effect and cumulative effect etc.; Performance is with the central nervous system neuro functional disturbance of unifying; Show as neurasthenic syndrome etc. clinically, therefore, the research of magnetic field radiation more and more receives people's attention.But the detection means to magnetic field radiation also is short of very much at present, and the instrument that external major company produces can detect, but these instruments are generally relatively more expensive, and the while volume is bigger, and function is numerous and diverse, can not civilian commercialization.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, provide a kind of simple in structure, simple to operate, the electromagnetic field detection module.

The utility model solves the technical scheme that its technical matters adopted: the electromagnetic field detection module; Comprise electromagnetic field pick-up circuit, central processing unit, RS485 communication interface circuit and warning circuit; The output terminal of said electromagnetic field pick-up circuit is through be connected to the input end of central processing unit successively through amplifier circuit, level displaing circuit, the output terminal of central processing unit is connected to the input end of RS485 communication interface circuit and warning circuit.

Said electromagnetic field pick-up circuit adopts pick-up winding L1 to gather the signal of energy of electromagnetic field.

Said amplifier circuit adopts low noise junction field effect pipe operational amplifier IC1, and the output terminal of low noise junction field effect pipe operational amplifier IC1 is connected with compensated regulator W1.

It is core processing unit that said central processing unit adopts single-chip microcomputer IC4.

Said RS485 communication interface circuit sends data message through SN75176 communication interface modules IC 3 to PC.

Through adopting above-mentioned technical scheme, the beneficial effect of the utility model is: the utility model adopts the radiation of inductive pickup coils detection of electromagnetic fields, when human body is regional near the electromagnetic radiation that harm is arranged; Through induced radiation testing circuit signals collecting, put aftertreatment after; After judging by central processing unit, send AIS, and a little less than showing current electromagnetic field intensity through PC; Giving certain prompting reports to the police; Reminds people is noted the harm that radiation brings people, thereby rationally dodges, and reaches the purpose of protection.

Description of drawings

Fig. 1 is the block diagram of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model.

Embodiment

Like Fig. 1, shown in Figure 2; The electromagnetic field detection module of the utility model; Comprise electromagnetic field pick-up circuit 1, central processing unit 2, RS485 communication interface circuit 3 and warning circuit 4; The output terminal of said electromagnetic field pick-up circuit 1 is through be connected to the input end of central processing unit 2 successively through amplifier circuit 11, level displaing circuit 12, the output terminal of central processing unit 2 is connected to the input end of RS485 communication interface circuit 3 and warning circuit 4.

Said electromagnetic field pick-up circuit 1 adopts pick-up winding L1 to gather the signal of energy of electromagnetic field, and amplifier circuit 11 adopts low noise junction field effect pipe operational amplifier IC1, is connected with compensated regulator W1 between the 1st pin of low noise junction field effect pipe operational amplifier IC1 and the 5th pin output terminal; The 2nd pin anti-phase pin of low noise junction field effect pipe operational amplifier IC1 and the bias current of its homophase pin the 3rd pin can be lower than 7nA; The magnetic energy of pick-up winding L1 through gathering from the institute monitored area carries out dynamic bias to the input end of pick-up winding L1, and between input end, forms potential difference (PD); So the 6th pin output pin of low noise junction field effect pipe operational amplifier IC1 is uprised; This noble potential is through resistance R 1 current limliting, and it is luminous that LED 1 is lighted, and the high impulse of low noise junction field effect pipe operational amplifier IC1 output simultaneously is connected to the 5th pin of level display driver circuit IC2 through adjustable potentiometer W2; Along with low noise junction field effect pipe operational amplifier IC1 output pulse has increase; Level display driver circuit IC2 is respectively by its 16th, 17,18 pin output low level, and this signal is input to the 21st, 23, the 32 pin I/O end of single-chip microcomputer IC4 again, through the potential state of its I/O end of single-chip microcomputer IC4 scanning; After single-chip microcomputer IC1 inter-process is judged; Send control signal, by the 2nd pin output low level of single-chip microcomputer IC4, through resistance R 7 current limlitings; Make news Chinese percussion instrument BY send alarm sound, prompting has than the auxilliary signal of penetrating of strong-electromagnetic field.The 1st, 2,3,4 ends of another route SN75176 communication interface modules IC3 and the 10th, 11,25 ends of single-chip microcomputer IC4, resistance R 8 etc. are formed RS485 communication interface circuit 3; Send data-signal by single-chip microcomputer IC4 to SN75176 communication interface modules IC3; After SN75176 communication interface modules IC3 conversion, send current data information to PC; PC shows that the electromagnetic field signal of current surveillance area is strong and weak, thus effectively instruct practitioner's safe distance judgement.

An above-described preferred embodiment that is merely the utility model can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. electromagnetic field detection module; It is characterized in that: comprise electromagnetic field pick-up circuit (1), central processing unit (2), RS485 communication interface circuit (3) and warning circuit (4); The output terminal of said electromagnetic field pick-up circuit (1) is through be connected to the input end of central processing unit (2) successively through amplifier circuit (11), level displaing circuit (12), the output terminal of central processing unit (2) is connected to the input end of RS485 communication interface circuit (3) and warning circuit (4).

2. electromagnetic field detection module according to claim 1 is characterized in that: said electromagnetic field pick-up circuit (1) adopts pick-up winding L1 to gather the signal of energy of electromagnetic field.

3. electromagnetic field detection module according to claim 1 and 2; It is characterized in that: said amplifier circuit (11) adopts low noise junction field effect pipe operational amplifier IC1, and the output terminal of low noise junction field effect pipe operational amplifier IC1 is connected with compensated regulator W1.

4. electromagnetic field detection module according to claim 1 is characterized in that: it is core processing unit that said central processing unit (2) adopts single-chip microcomputer IC4.

5. electromagnetic field detection module according to claim 1 is characterized in that: said RS485 communication interface circuit (3) sends data message through SN75176 communication interface modules IC3 to PC.