CN108378449B - Helmet-type wearable sensor and safety helmet - Google Patents
Helmet-type wearable sensor and safety helmet Download PDFInfo
- Publication number
- CN108378449B CN108378449B CN201810170692.2A CN201810170692A CN108378449B CN 108378449 B CN108378449 B CN 108378449B CN 201810170692 A CN201810170692 A CN 201810170692A CN 108378449 B CN108378449 B CN 108378449B
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- probe
- sensor
- helmet
- carbon monoxide
- methane
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 104
- 239000000523 sample Substances 0.000 claims description 98
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 52
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 52
- 239000001301 oxygen Substances 0.000 claims description 52
- 229910052760 oxygen Inorganic materials 0.000 claims description 52
- 239000007789 gas Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 6
- 230000000007 visual effect Effects 0.000 description 6
- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1Cl JAYCNKDKIKZTAF-UHFFFAOYSA-N 0.000 description 3
- 101100084627 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) pcb-4 gene Proteins 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/0406—Accessories for helmets
- A42B3/0433—Detecting, signalling or lighting devices
- A42B3/046—Means for detecting hazards or accidents
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
The utility model provides a helmet-mounted sensor, includes the detachable mounting bracket that encircles helmet main body's periphery setting, wears to establish sensor mount pad on the detachable mounting bracket and fix the sensor on the sensor mount pad. The invention also relates to a safety helmet comprising the helmet-type wearable sensor. The helmet-type wearable sensor and the safety helmet comprising the helmet-type wearable sensor are implemented, and the sensor is fixed to the safety helmet through the detachable mounting bracket and the sensor mounting seat penetrating through the detachable mounting bracket, so that the stress structure of the safety helmet is not damaged, and the safety helmet is convenient to detach.
Description
Technical Field
The present invention relates to a safety helmet, and more particularly, to a helmet-type wearable sensor and a safety helmet including the same.
Background
The safety helmet is safety protection equipment which a miner must wear in mine work, and the head can be effectively protected when the safety helmet is worn. The conventional mine safety helmet only protects the head and lights, and is not satisfactory in the face of various complicated situations in the mine, especially dangerous situations such as sudden gas leakage and the like. Thus, injection molding of gas probes in safety helmets to detect gas in a mine has been proposed in the prior art. However, such a safety helmet has a disadvantage in that it generally adopts a gas probe integrally injection-molded with the safety helmet, and the force-bearing structure of the safety helmet is generally required to be broken to be fixed, so that not only is the assembly and disassembly inconvenient, but also potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides a helmet-type wearable sensor which does not damage a stress structure of a safety helmet and is convenient to detach and the safety helmet comprising the helmet-type wearable sensor.
The technical scheme adopted for solving the technical problems is as follows: a helmet-mounted sensor is constructed and comprises a detachable mounting bracket, a sensor mounting seat and a sensor, wherein the detachable mounting bracket is arranged around the periphery of a helmet main body, the sensor mounting seat is arranged on the detachable mounting bracket in a penetrating mode, and the sensor is fixed on the sensor mounting seat.
In the helmet-type wearable sensor of the present invention, the detachable mounting bracket includes an arc-shaped supporting rod surrounding the rear half of the helmet body, fixing bolts fixing the arc-shaped supporting rod at the left and right sides of the helmet body, and fixing slots provided on the helmet body to insert the fixing bolts.
In the helmet-type wearable sensor, the curvature of the sensor mounting seat is the same as that of the rear part of the helmet main body so as to be attached to the rear part of the helmet main body, and a through groove for the arc-shaped supporting rod to pass through is formed in the sensor mounting seat.
In the helmet-type wearable sensor, the sensor comprises a gas signal processor, an oxygen probe, a methane probe and a carbon monoxide probe, wherein the gas signal processor is arranged on a sensor mounting seat, the oxygen probe, the methane probe and the carbon monoxide probe are arranged on the gas signal processor, the oxygen probe, the methane probe and the carbon monoxide probe are all downwards arranged in the vertical direction, and a sensor cover plate is fixedly arranged on the sensor mounting seat around the oxygen probe, the methane probe and the carbon monoxide probe.
In the helmet-mounted sensor, the gas signal processor comprises a wiring board and a signal processing PCB, wherein the wiring board and the signal processing PCB are fixed on the sensor mounting seat through screws, and the signal processing PCB is in communication connection with the oxygen probe, the methane probe and the carbon monoxide probe through the wiring board.
In the helmet-mounted type sensor provided by the invention, the signal processing PCB is an arc-shaped plate, and the oxygen probe, the methane probe and the carbon monoxide probe are welded or inserted on the signal processing PCB.
In the helmet-type wearable sensor, an oxygen probe shield is arranged between the sensor cover plate and the oxygen probe, a methane probe shield is arranged between the sensor cover plate and the methane probe, a carbon monoxide probe shield is arranged between the sensor cover plate and the carbon monoxide probe, and a plurality of vent holes communicated with the atmosphere are arranged at the lower parts of the oxygen probe shield, the methane probe shield and the carbon monoxide probe shield.
In the helmet-type wearable sensor, a cover plate sealing ring is arranged at the joint surface of the sensor mounting seat and the sensor cover plate, and probe sealing rings are respectively arranged between the oxygen probe shield and the oxygen probe, between the methane probe shield and the methane probe and between the carbon monoxide probe shield and the carbon monoxide probe.
In the helmet-type wearable sensor, a power interface and a wire interface are respectively arranged on the left side and the right side of the sensor base, and an external cable clamping sleeve is arranged on the outer side of the sensor cover plate.
Another technical scheme adopted by the invention for solving the technical problems is to construct a safety helmet, which comprises a helmet main body and any one of the helmet type wearable sensors.
The helmet-type wearable sensor and the safety helmet comprising the helmet-type wearable sensor are implemented, and the sensor is fixed to the safety helmet through the detachable mounting bracket and the sensor mounting seat penetrating through the detachable mounting bracket, so that the stress structure of the safety helmet is not damaged, and the safety helmet is convenient to detach. Further, by adopting the form of multi-probe set, the accurate analysis of various gas components in the mixed gas place can be realized, and the whole helmet-type wearable sensor has small volume and light weight.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural view of a preferred embodiment of the head-mounted sensor of the present invention;
fig. 2 is a functional block diagram of a sensor of a preferred embodiment of the helmet-mounted sensor of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention relates to a helmet-mounted sensor, which comprises a detachable mounting bracket, a sensor mounting seat and a sensor, wherein the detachable mounting bracket is arranged around the periphery of a helmet main body, the sensor mounting seat is arranged on the detachable mounting bracket in a penetrating mode, and the sensor is fixed on the sensor mounting seat. The helmet-type wearable sensor and the safety helmet comprising the helmet-type wearable sensor are implemented, and the sensor is fixed to the safety helmet through the detachable mounting bracket and the sensor mounting seat penetrating through the detachable mounting bracket, so that the stress structure of the safety helmet is not damaged, and the safety helmet is convenient to detach.
Fig. 1 is a schematic structural view of a preferred embodiment of the head-mounted sensor of the present invention. As shown in fig. 1, the helmet-type wearable sensor of the present invention includes a detachable mounting bracket provided around the outer circumference of a helmet body 15, a sensor mount 6 penetrating the detachable mounting bracket, and a sensor fixed to the sensor mount 6. In a simplified embodiment of the invention, the removable mounting bracket may comprise a support member secured to the outer periphery of the helmet body 15 by any removable component, such as by a retaining clip, mortise and tenon structure, strap structure, or the like. The sensor may be any gas or temperature or humidity sensor, such as an oxygen sensor, a nitrogen sensor, a methane sensor, a carbon monoxide sensor, and the like. The sensor may comprise one or more different types of sensors. In the present invention, the detachable mounting bracket and the sensor mount 6 may be made of hard plastic.
Fig. 1 shows a preferred removable mounting bracket. As shown in fig. 1, the detachable mounting bracket of the present invention includes an arc-shaped support bar 13 surrounding the rear half of a helmet body 15, fixing screws 14 fixing the arc-shaped support bar 13 to the left and right sides of the helmet body 15, and fixing slots 17 provided on the helmet body 15 to insert the fixing screws 14. In this embodiment, the arc-shaped support bar 13 is preferably adapted to the shape of the rear half of the helmet body 14. Preferably, a through groove for the arc-shaped supporting rod 13 to pass through is arranged on the sensor mounting seat 6. The sensor mount 6 has the same curvature as the rear of the helmet body 15 to fit on the rear of the helmet body 15. The sensor mount 6 may be further secured to the rear of the helmet body 15 by means of gluing or the like. Of course, in other preferred embodiments of the invention, it is also possible to prevent the sensor mount 6 from sliding on the arc-shaped support bar 13, etc. by providing a latch on the arc-shaped support bar 13, for example.
Fig. 1 further shows a preferred sensor. As shown in fig. 1, the sensor includes a gas signal processor provided on the sensor mount 6, and an oxygen probe 1, a methane probe, and a carbon monoxide probe 3 provided on the gas signal processor. In this embodiment, the gas signal processor includes a wiring board 5 and a signal processing PCB board 4 fixed on the sensor mount 6 by screws 11, and the signal processing PCB board 4 is communicatively connected with the oxygen probe 1, the methane probe 2 and the carbon monoxide probe 3 through the wiring board 5. As shown in fig. 1, the signal processing PCB 4 is an arc-shaped board. In the vertical direction, the signal processing PCB board 4 is mounted downward on the sensor mount 6 together with the wiring board 5. And the oxygen probe 1, the methane probe 2 and the carbon monoxide probe 3 are also soldered or inserted on the signal processing PCB 4 in the vertical direction. Thus, the entire sensor and sensor mount 6 is in a flip-chip configuration. The oxygen probe 1, the methane probe 2 and the carbon monoxide probe 3 are all downward. And a sensor cover plate 7 is fixedly arranged on the sensor mounting seat 6 around the oxygen probe 1, the methane probe 2 and the carbon monoxide probe 3. Between the sensor cover plate 7 and the oxygen probe 1, between the sensor cover plate 7 and the methane probe 2, a shield 19 is respectively arranged between the sensor cover plate 7 and the carbon monoxide probe 3. These shields 19 are preferably cylindrical in shape, and are provided with a plurality of vent holes 18 communicating with the atmosphere on the lower circumference thereof.
Further, in the preferred embodiment shown in fig. 1, a cover sealing ring 12 is provided at the joint surface of the sensor mounting seat 6 and the sensor cover 7, and a probe sealing ring 8 is provided between each shield 19 and the sensor cover 7. In a further preferred embodiment, a sealing groove can also be provided at the junction of the sensor mount 6 and the sensor cover 7. As further shown in fig. 1, the left and right sides of the sensor base 6 are respectively provided with a power interface 9 and a wire interface 10, and an external cable ferrule is arranged on the outer side of the sensor cover 7 for accommodating a head lamp cable 16, for example.
In a preferred embodiment of the invention, the detachable mounting bracket, the sensor mount 6 and the sensor cover 7 may all be made of plastic. The sensor mount 6 and the sensor cover 7 may be integrally formed.
The helmet-type wearable sensor and the safety helmet comprising the helmet-type wearable sensor are implemented, and the sensor is fixed to the safety helmet through the detachable mounting bracket and the sensor mounting seat penetrating through the detachable mounting bracket, so that the stress structure of the safety helmet is not damaged, and the safety helmet is convenient to detach. Further, by adopting the form of multi-probe set, the accurate analysis of various gas components in the mixed gas place can be realized, and the whole helmet-type wearable sensor has small volume and light weight.
Fig. 2 is a functional block diagram of a sensor of a preferred embodiment of the helmet-mounted sensor of the present invention. In a preferred embodiment of the present invention, as shown in fig. 2, the oxygen probe 1, the methane probe 2 and the carbon monoxide probe 3 are connected to the signal processing PCB board 4 via the wiring board 5, respectively. The signal processing PCB 4 comprises an oxygen detector 41, a methane detector 42, a carbon monoxide detector 43, an oxygen alarm 44, a methane alarm 45 and a carbon monoxide alarm 44.
In a preferred embodiment of the present invention, when the oxygen probe 1 detects oxygen, an oxygen detection signal is sent to the oxygen detector 41, and the oxygen detector 41 generates an oxygen alarm signal based on the oxygen detection signal and transmits the oxygen alarm signal to the oxygen alarm 44. The oxygen alarm 44 may provide a voice alarm or an audible and visual indication. In another preferred embodiment of the present invention, when the oxygen probe 1 detects oxygen, a detected oxygen concentration value is transmitted to the oxygen detector 41, the oxygen detector 41 compares the oxygen concentration value with a preset value, and when the oxygen concentration value is greater than the preset value, an oxygen alarm signal is generated and transmitted to the oxygen alarm 44. The oxygen alarm 44 may emit an audible and visual cue, such as an audible alarm that oxygen is detected, or a red light.
Similarly, when the methane probe 2 detects methane, a methane detection signal is sent to the methane detector 42, and the methane detector 42 generates a methane alarm signal based on the methane detection signal and transmits the methane alarm signal to the methane alarm 45. The methane alarm 45 can give a voice alarm or give an audible and visual cue. In another preferred embodiment of the present invention, when the methane probe 2 detects methane, a detected methane concentration value is transmitted to the methane detector 42, the methane detector 42 compares the methane concentration value with a preset value, and when the methane concentration value is greater than the preset value, a methane alarm signal is generated and transmitted to the methane alarm 45. The methane alarm 45 may emit an audible and visual cue, such as an audible alarm that methane is detected, or a yellow light.
When the carbon monoxide probe 3 detects carbon monoxide, a carbon monoxide detection signal is sent to the carbon monoxide detector 43, and the carbon monoxide detector 43 generates a carbon monoxide alarm signal based on the carbon monoxide detection signal and transmits the carbon monoxide alarm signal to the carbon monoxide alarm 46. The carbon monoxide alarm 46 may give a voice alarm or give an audible and visual cue. In another preferred embodiment of the present invention, when the carbon monoxide probe 3 detects carbon monoxide, a detected carbon monoxide concentration value is transmitted to the carbon monoxide detector 43, the carbon monoxide detector 43 compares the carbon monoxide concentration value with a preset value, and when the carbon monoxide concentration value is greater than the preset value, a carbon monoxide alarm signal is generated and transmitted to the carbon monoxide alarm 46. The carbon monoxide alarm 46 may emit an audible and visual cue, such as an audible alarm that carbon monoxide is detected, or may emit blue light.
In this embodiment, by adopting a form of multiple probe sets, accurate analysis of various gas components in a mixed gas site can be achieved.
Another technical scheme adopted by the invention for solving the technical problems is to construct a safety helmet, which comprises a helmet main body and any one of the helmet type wearable sensors. Those skilled in the art will be able to construct such a safety helmet based on the teachings of the present invention and will not be further described herein.
Moreover, although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described devices or apparatus, the terms used to describe such devices or apparatus are intended to correspond, unless otherwise indicated, to any device or apparatus which performs the specified function of the described device or apparatus (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. Furthermore, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The helmet-type wearable sensor is characterized by comprising a detachable mounting bracket, a sensor mounting seat and a sensor, wherein the detachable mounting bracket is arranged around the periphery of a helmet main body, the sensor mounting seat is arranged on the detachable mounting bracket in a penetrating manner, and the sensor is fixed on the sensor mounting seat; the detachable mounting bracket comprises an arc-shaped supporting rod encircling the rear half circumference of the helmet main body, fixing clamping screws for fixing the arc-shaped supporting rod on the left side and the right side of the helmet main body, and fixing clamping grooves arranged on the helmet main body for inserting the fixing clamping screws; the curvature of the sensor mounting seat is the same as that of the rear part of the helmet main body so as to be attached to the rear part of the helmet main body, and a through groove for the arc-shaped supporting rod to pass through is formed in the sensor mounting seat; the sensor comprises a gas signal processor arranged on a sensor mounting seat, and an oxygen probe, a methane probe and a carbon monoxide probe which are arranged on the gas signal processor, wherein the gas signal processor, the oxygen probe, the methane probe and the carbon monoxide probe are all downwards arranged in the vertical direction, and a sensor cover plate is fixedly arranged on the sensor mounting seat around the oxygen probe, the methane probe and the carbon monoxide probe; the gas signal processor comprises a wiring board and a signal processing PCB (printed circuit board) which are fixed on the sensor mounting seat through screws, and the signal processing PCB is in communication connection with the oxygen probe, the methane probe and the carbon monoxide probe through the wiring board; the signal processing PCB is an arc-shaped plate, and the oxygen probe, the methane probe and the carbon monoxide probe are welded or inserted on the signal processing PCB; an oxygen probe shield is arranged between the sensor cover plate and the oxygen probe, a methane probe shield is arranged between the sensor cover plate and the methane probe, a carbon monoxide probe shield is arranged between the sensor cover plate and the carbon monoxide probe, and a plurality of vent holes communicated with the atmosphere are arranged at the lower parts of the oxygen probe shield, the methane probe shield and the carbon monoxide probe shield; a cover plate sealing ring is arranged at the joint surface of the sensor mounting seat and the sensor cover plate, and a probe sealing ring is respectively arranged between the oxygen probe shield and the oxygen probe, between the methane probe shield and the methane probe, and between the carbon monoxide probe shield and the carbon monoxide probe; the left side and the right side of the sensor base are respectively provided with a power interface and a wire interface, and the outer side of the sensor cover plate is provided with an external cable clamping sleeve.
2. A safety helmet comprising a helmet body and a helmet-mounted sensor according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170692.2A CN108378449B (en) | 2018-03-01 | 2018-03-01 | Helmet-type wearable sensor and safety helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170692.2A CN108378449B (en) | 2018-03-01 | 2018-03-01 | Helmet-type wearable sensor and safety helmet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108378449A CN108378449A (en) | 2018-08-10 |
| CN108378449B true CN108378449B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810170692.2A Active CN108378449B (en) | 2018-03-01 | 2018-03-01 | Helmet-type wearable sensor and safety helmet |
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| Country | Link |
|---|---|
| CN (1) | CN108378449B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008176457A (en) * | 2007-01-17 | 2008-07-31 | Riken Keiki Co Ltd | Gas alarm |
| CN102228319A (en) * | 2011-05-25 | 2011-11-02 | 浙江大学 | Multisensor-integrated intelligent helmet |
| CN202932127U (en) * | 2012-10-22 | 2013-05-15 | 李建龙 | Multiparameter gas detecting and warning combined mine lamp cap |
| WO2016182116A1 (en) * | 2015-05-14 | 2016-11-17 | 주식회사 한성세이프티 | Smart safety helmet |
| CN207020808U (en) * | 2017-05-08 | 2018-02-16 | 西安科技大学 | A kind of coal mine safety monitoring device |
| CN208144541U (en) * | 2018-03-01 | 2018-11-27 | 深圳市德塔防爆电动汽车有限公司 | Helmet-type body-worn sensors and crash helmet |
-
2018
- 2018-03-01 CN CN201810170692.2A patent/CN108378449B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008176457A (en) * | 2007-01-17 | 2008-07-31 | Riken Keiki Co Ltd | Gas alarm |
| CN102228319A (en) * | 2011-05-25 | 2011-11-02 | 浙江大学 | Multisensor-integrated intelligent helmet |
| CN202932127U (en) * | 2012-10-22 | 2013-05-15 | 李建龙 | Multiparameter gas detecting and warning combined mine lamp cap |
| WO2016182116A1 (en) * | 2015-05-14 | 2016-11-17 | 주식회사 한성세이프티 | Smart safety helmet |
| CN207020808U (en) * | 2017-05-08 | 2018-02-16 | 西安科技大学 | A kind of coal mine safety monitoring device |
| CN208144541U (en) * | 2018-03-01 | 2018-11-27 | 深圳市德塔防爆电动汽车有限公司 | Helmet-type body-worn sensors and crash helmet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108378449A (en) | 2018-08-10 |
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