CN110441719A - A kind of safety early warning device and its application method based on tunnel magneto-resistance effect - Google Patents
A kind of safety early warning device and its application method based on tunnel magneto-resistance effect Download PDFInfo
- Publication number
- CN110441719A CN110441719A CN201910707396.6A CN201910707396A CN110441719A CN 110441719 A CN110441719 A CN 110441719A CN 201910707396 A CN201910707396 A CN 201910707396A CN 110441719 A CN110441719 A CN 110441719A
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- Prior art keywords
- tunnel magneto
- resistive sensor
- early warning
- resistance
- tunnel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/098—Magnetoresistive devices comprising tunnel junctions, e.g. tunnel magnetoresistance sensors
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention discloses a kind of safety early warning devices based on tunnel magneto-resistance effect, including for causing the permanent magnet of danger zone changes of magnetic field, for sensitive changes of magnetic field and thus the tunnel magneto-resistive sensor of itself resistance variations is generated, tunnel magneto-resistive sensor both ends are applied to for converting the resistance variations of tunnel magneto-resistive sensor to the constant-voltage control circuit of curent change, for comparing the processor of the electric current after changing and default safe current range and trigger attention device control switch, for controlling the alarming device control switch of alarming device, alarming device for sounding an alarm.The invention has the benefit that it not only induction alarm is sensitive and accurate, but also can be required to set corresponding safe current range according to different safe distances, there is very strong applicability.
Description
Technical field
It is specifically a kind of based on tunnel magneto-resistance effect the present invention relates to the technical field of danger zone operating personnel safety
The technical field of safety early warning device and its application method.
Background technique
Currently, construction mode, most of important goals, hazards loops are all reduced the number of in implementation " amount essence can be of fine quality " in the whole world
Border operation be also at " soldier lacks deficiency and defends, soldier it is more then be unequal to its support " situation, hazardous environment operation generally face authorized personnel it is few,
Alert duty strength is weak, task weight, receives and dispatches the status that operation is more, safe pressure is big, therefore hazardous environment operation control is not in place
Caused Frequent Accidents.
For this purpose, researcher studies a variety of warning devices: (1) the electrification induction alarm device based on electromagnetic induction principle,
But since the electric field other than conducting wire safe distance is faint, affected by environment very big, induction is unstable, and induction range is limited；
(2) based on the warning device of personnel positioning, but due to operative scenario complexity, there is the problems such as blocking, interfering, to positioning device
Positioning accuracy forms very big influence.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of not only sensitive standards of induction alarm
It really, and can be according to the safety based on tunnel magneto-resistance effect of the corresponding safe current range of different safe distances requirement setting
Prior-warning device and its application method.
To achieve the above object, the invention adopts the following technical scheme: a kind of safe early warning based on tunnel magneto-resistance effect
For sensitive changes of magnetic field and thus device generates self-resistance including for causing the permanent magnet of danger zone changes of magnetic field
The tunnel magneto-resistive sensor of variation is applied to tunnel magneto-resistive sensor both ends for turning the resistance variations of tunnel magneto-resistive sensor
The constant-voltage control circuit for turning to curent change, for comparing the electric current after changing and default safe current range and triggering warning dress
The processor for setting control switch, the alarming device for controlling the alarming device control switch of alarming device, for sounding an alarm.
Further, permanent magnet of the invention is portable permanent body.
Further, tunnel magneto-resistive sensor of the invention is TMR sensor.
Further, processor of the invention is single-chip microcontroller, DSP or microcontroller.
Further, alarming device of the invention is warning lamp, warning buzzer or voice reminder broadcast device.
A kind of application method of the safety early warning device based on tunnel magneto-resistance effect, comprising the following steps:
Step 1: it is required according to the safe distance of danger zone, sets corresponding safe current range；
Step 2: tunnel magneto-resistive sensor, constant-voltage control circuit, processor, alarming device control switch and warning are filled
It sets and is arranged in danger zone；
Step 3: when operating personnel is close to or smaller than safe distance required in step 1 during the work time, work
The magnetic being arranged in around the tunnel magneto-resistive sensor of danger zone in step 2 will be caused by making the portable permanent magnet of personnel
Field variation；
Step 4: changes of magnetic field under the action of magnetoresistance in step 3 can cause the resistance of tunnel magneto-resistive sensor
Variation；
Step 5: under the control of tunnel magneto-resistive sensor both ends constant-voltage control circuit, tunnel magneto-resistive sensor resistance
Variation will cause the variation of the electric current by tunnel magneto-resistive sensor；
Step 6: the electric current after changing in step 5 is sent to processor；
Step 7: processor by step 6 electric current and step 1 in the safe current range that sets be compared, when
When the electric current that transmission comes is beyond the safe current range set, processor trigger attention device control switch；
Step 8: alarming device control switch control alarming device sounds an alarm.
The utility model has the advantages that compared with the prior art, the advantages of the present invention are as follows:
(1) resistance of tunnel magneto-resistive sensor of the invention becomes under the action of magnetoresistance with the variation in magnetic field
Change, highly sensitive characteristic makes induction alarm of the present invention sensitive and accurate；
(2) safety of the present invention setting danger zone by way of the safe current range of tunnel magneto-resistive sensor is arranged
Required distance, so that the present invention can require freely to regulate and control safe distance range according to different scenes, ensure that makes under different places
Convenience and applicability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is operation schematic diagram of the invention；
Fig. 2 is the schematic diagram of constant-voltage control circuit of the invention.
Description of symbols: 2- input pin, 4- grounding pin, 6- output pin.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawing:
As shown in Figure 1, a kind of safety early warning device based on tunnel magneto-resistance effect, including for causing danger zone magnetic field
For sensitive changes of magnetic field and thus the permanent magnet of variation generates the tunnel magneto-resistive sensor of itself resistance variations, is applied to tunnel
Road magnetoresistive sensor both ends are used to convert the resistance variations of tunnel magneto-resistive sensor to the constant-voltage control circuit of curent change, use
The processor of electric current and default safe current range after comparing variation and trigger attention device control switch, for controlling police
The alarming device control switch of showing device, the alarming device for sounding an alarm.
As shown in Figure 1, permanent magnet of the invention is portable permanent body.
As shown in Figure 1, tunnel magneto-resistive sensor of the invention is TMR sensor.
As shown in Figure 1, processor of the invention is single-chip microcontroller, DSP or microcontroller.
As shown in Figure 1, alarming device of the invention is warning lamp, warning buzzer or voice reminder broadcast device.
A kind of application method of the safety early warning device based on tunnel magneto-resistance effect, comprising the following steps:
Step 1: it is required according to the safe distance of danger zone, sets corresponding safe current range；
Step 2: tunnel magneto-resistive sensor, constant-voltage control circuit, processor, alarming device control switch and warning are filled
It sets and is arranged in danger zone；
Step 3: when operating personnel is close to or smaller than safe distance required in step 1 during the work time, work
The magnetic being arranged in around the tunnel magneto-resistive sensor of danger zone in step 2 will be caused by making the portable permanent magnet of personnel
Field variation；
Step 4: changes of magnetic field under the action of magnetoresistance in step 3 can cause the resistance of tunnel magneto-resistive sensor
Variation；
Step 5: under the control of tunnel magneto-resistive sensor both ends constant-voltage control circuit, tunnel magneto-resistive sensor resistance
Variation will cause the variation of the electric current by tunnel magneto-resistive sensor；
Step 6: the electric current after changing in step 5 is sent to processor；
Step 7: processor by step 6 electric current and step 1 in the safe current range that sets be compared, when
When the electric current that transmission comes is beyond the safe current range set, processor trigger attention device control switch；
Step 8: alarming device control switch control alarming device sounds an alarm.
As shown in Fig. 2, constant-voltage control circuit of the invention includes ADR421, operational amplifier and field-effect tube N1；
The input pin 2 of ADR421 is energization input, and the grounding pin 4 of ADR421 is grounded, and the output pin 6 of ADR421 is connected to fortune
The "+" end input of amplifier is calculated, the output end of operational amplifier is connected to field-effect tube N1Grid, the "-" of operational amplifier
End input is connected to field-effect tube N1Source electrode.Wherein, ADR421 provides voltage reference, and operational amplifier controls field-effect tube N1,
Under negative feedback control, so that the final output V of circuitOUTV equal to ADR421OUT, and it is applied to tunnel magneto-resistive sensor two
End.
The above is only used to illustrate the technical scheme of the present invention and not to limit it, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (6)
1. a kind of safety early warning device based on tunnel magneto-resistance effect, it is characterised in that: including for causing danger zone magnetic field
For sensitive changes of magnetic field and thus the permanent magnet of variation generates the tunnel magneto-resistive sensor of itself resistance variations, is applied to tunnel
Road magnetoresistive sensor both ends are used to convert the resistance variations of tunnel magneto-resistive sensor to the constant-voltage control circuit of curent change, use
The processor of electric current and default safe current range after comparing variation and trigger attention device control switch, for controlling police
The alarming device control switch of showing device, the alarming device for sounding an alarm.
2. the safety early warning device according to claim 1 based on tunnel magneto-resistance effect, it is characterised in that: the permanent magnet
For portable permanent body.
3. the safety early warning device according to claim 1 based on tunnel magneto-resistance effect, it is characterised in that: the tunnel magnetic
Resistance sensor is TMR sensor.
4. the safety early warning device according to claim 1 based on tunnel magneto-resistance effect, it is characterised in that: the processor
For single-chip microcontroller, DSP or microcontroller.
5. the safety early warning device according to claim 1 based on tunnel magneto-resistance effect, it is characterised in that: the warning dress
It is set to warning lamp, warning buzzer or voice reminder broadcast device.
6. according to claim 1 to the application method of the safety early warning device described in 5 any one based on tunnel magneto-resistance effect,
Characterized by comprising the following steps:
Step 1: it is required according to the safe distance of danger zone, sets corresponding safe current range；
Step 2: by tunnel magneto-resistive sensor, constant-voltage control circuit, processor, alarming device control switch and alarming device cloth
It is placed in danger zone；
Step 3: when operating personnel is close to or smaller than safe distance required in step 1 during the work time, work people
The portable permanent magnet of member will cause the magnetic field being arranged in around the tunnel magneto-resistive sensor of danger zone in step 2 to become
Change；
Step 4: changes of magnetic field under the action of magnetoresistance in step 3 can cause the resistance of tunnel magneto-resistive sensor to become
Change；
Step 5: under the control of tunnel magneto-resistive sensor both ends constant-voltage control circuit, the variation of tunnel magneto-resistive sensor resistance
It will cause the variation of the electric current by tunnel magneto-resistive sensor；
Step 6: the electric current after changing in step 5 is sent to processor；
Step 7: processor by step 6 electric current and step 1 in the safe current range that sets be compared, work as transmission
When the electric current come is beyond the safe current range set, processor trigger attention device control switch；
Step 8: alarming device control switch control alarming device sounds an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707396.6A CN110441719A (en) | 2019-08-01 | 2019-08-01 | A kind of safety early warning device and its application method based on tunnel magneto-resistance effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707396.6A CN110441719A (en) | 2019-08-01 | 2019-08-01 | A kind of safety early warning device and its application method based on tunnel magneto-resistance effect |
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| CN110441719A true CN110441719A (en) | 2019-11-12 |
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| CN201910707396.6A Pending CN110441719A (en) | 2019-08-01 | 2019-08-01 | A kind of safety early warning device and its application method based on tunnel magneto-resistance effect |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260513A (en) * | 2010-08-19 | 2013-08-21 | 株式会社Lg生命科学 | Detection system using magnetic resistance sensor |
| CN104567848A (en) * | 2015-01-28 | 2015-04-29 | 中北大学 | Micromechanical gyroscope based on tunnel magnetoresistive effect |
| CN204730842U (en) * | 2015-01-28 | 2015-10-28 | 李孟委 | A kind of micromechanical gyro based on tunnel magneto-resistance effect |
| CN205445677U (en) * | 2016-03-29 | 2016-08-10 | 福建高新源工程科技有限公司 | Tunnel safety precaution and automatic control system of measurationing |
| CN205538822U (en) * | 2016-01-20 | 2016-08-31 | 江苏多维科技有限公司 | Nondestructive test device based on tunnel magnetism resistance transducer |
-
2019
- 2019-08-01 CN CN201910707396.6A patent/CN110441719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103260513A (en) * | 2010-08-19 | 2013-08-21 | 株式会社Lg生命科学 | Detection system using magnetic resistance sensor |
| CN104567848A (en) * | 2015-01-28 | 2015-04-29 | 中北大学 | Micromechanical gyroscope based on tunnel magnetoresistive effect |
| CN204730842U (en) * | 2015-01-28 | 2015-10-28 | 李孟委 | A kind of micromechanical gyro based on tunnel magneto-resistance effect |
| CN205538822U (en) * | 2016-01-20 | 2016-08-31 | 江苏多维科技有限公司 | Nondestructive test device based on tunnel magnetism resistance transducer |
| CN205445677U (en) * | 2016-03-29 | 2016-08-10 | 福建高新源工程科技有限公司 | Tunnel safety precaution and automatic control system of measurationing |
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Application publication date: 20191112 |