CN105701968A - Wireless monitoring alarm system for welding operation - Google Patents

Wireless monitoring alarm system for welding operation Download PDF

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Publication number
CN105701968A
CN105701968A CN201610188342.XA CN201610188342A CN105701968A CN 105701968 A CN105701968 A CN 105701968A CN 201610188342 A CN201610188342 A CN 201610188342A CN 105701968 A CN105701968 A CN 105701968A
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personnel
chip microcomputer
safety helmet
welding
sensor
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CN105701968B (en
Inventor
顾菊平
华亮
王胜锋
唐子峻
张新松
程天宇
季霆
张晴
沈庆
念路兵
蒋凌
华俊豪
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Nantong University
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Nantong University
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02Alarms for ensuring the safety of persons
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Abstract

The invention discloses a wireless monitoring alarm system for welding operation. The wireless monitoring alarm system comprises the components of a welding personnel safety helmet, a Zigbee on-chip system with which a single-chip microcomputer core is integrated, a photosensitive sensor, a photosensitive sensor interface circuit, a reflective infrared photosensitive sensor, a reflective infrared photosensitive sensor interface circuit, a tri-axial acceleration sensor, a reflection sheet, a first light shielding board, second light shielding board protective spectacles, a handheld mask and a Zigbee module. The wireless monitoring alarm system has a reasonable structure and can timely and accurately determine whether an operator utilizes the handheld mask or the protective spectacles and whether the safety helmet is worn and whether falling-off occurs.

Description

Weld job wireless monitoring-alarming system
The application is application number: 201410650747.1, the applying date: 2014.11.17, title " the long-range monitor and alarm system of Ship Welding personnel based on multi-sensor information fusion " divisional application。
Technical field
The present invention relates to and relate to a kind of monitoring system, be a kind of long-range monitor and alarm system of Ship Welding personnel based on multi-sensor information fusion。
Background technology
Ship Building and Repairing industry belongs to labour force and technology-intensive type industry, in hull construction, accounts for 30%~40% during hull construction chief engineer during Welder, and welding cost accounts for the 30%~50% of hull construction totle drilling cost。Ship Welding workload is very big, and ton oil carrier butt weld is at about 20KM;Ten ton oil carriers, butt weld is at about 50KM;Additionally, large ships such as ton container ship, bulk carrier, car carriers, butt weld is up to about 30KM。
China's Ship Building and Repairing welding is many based on human weld, mechanism scholar (the Xu Yan such as Peking University in 2012, Gong Manman, Wang Jiao etc. the radiation of electric welding ultraviolet is to workman's harm and safeguard procedures cross-sectional investigation [J]. Peking University's journal (medicine), 2012,44(3): 448-453) harm of operating personnel has been investigated by the radiation of electric welding ultraviolet。Study carefully the effective questionnaire of common acquisition 828 parts, wherein electric welder 721 people, auxiliary work 107 people。The symptom of facial skin lesions and sign incidence rate be successively from high to low scorching hot twinge (48.7%), skin itch (39%), pigmentation (31.9%), erubescence (25.4%), insensitive numbness (12%), macule pimple (10.1%), verrucous vegetation (3.7%)。In investigated workman, the people of 90% in the previous year in there is electric ophthalmia, the symptom of ophthalmic injuries by incidence rate be successively from high to low ocular pain (61.5%), photophobia shed tears (61.4%), blurred vision (50.2%), burn feeling (35.9%, foreign body sensation (32%), eyes twitch (12.2%)。Incidence rate to 438 workman's eye health check-ups discovery lenticular opacity is 15.8%, and the incidence rate of retinopathy is 2.5%。
It is second largest occupation disease outside pneumoconiosis that welder's electric ophthalmia that welding arc light causes is listed in, the risk factor not wearing protective mast is 1.8 times that wear protective mast, and carrying out the occasion of weld job many people simultaneously, it is not engaged in the personnel of weld job, is easily subject to the injury of circumference arc light radiation equally。When Ship Building and Repairing enterprise frequently occurs welding without the behavior of protective eye lens or welding mask, arc light, splashing cause impaired vision, skin histology to injure even skin carcinoma, have had a strong impact on healthy and work efficiency。The behavior do not sought fame and wealth for this violation weld job safety management specification, consciousness of self-protection must carry out effectively monitoring and management, stops the health hazards thus caused。
Summary of the invention
It is an object of the invention to provide a kind of rational in infrastructure, promptly and accurately judge whether practitioner uses the long-range monitor and alarm system of Ship Welding personnel based on multi-sensor information fusion welding hand shield or protective eye lens, whether safe wearing cap, whether falling。
The technical solution of the present invention is:
A kind of long-range monitor and alarm system of Ship Welding personnel based on multi-sensor information fusion, is characterized in that: includes welding personnel safety helmet, be integrated with the Zgibee SOC(system on a chip) of single-chip microcomputer kernel, light sensor and light sensor interface circuit, reflective infrared photoelectric sensor and reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor, reflector plate, the first dark slide, the second dark slide protective eye lens, hand screen, Zigbee module;Wherein be integrated with the Zigbee SOC(system on a chip) of single-chip microcomputer kernel, light sensor and light sensor interface circuit, reflective infrared photoelectric sensor and reflective infrared photoelectric sensor interface circuitry, the first dark slide, 3-axis acceleration sensor are installed on welding personnel safety helmet;Be integrated with single-chip microcomputer kernel Zigbee SOC(system on a chip), light sensor interface circuit, reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor are installed in welding personnel safety helmet;Light sensor, reflective infrared photoelectric sensor, the first dark slide are fixedly mounted on welding personnel safety helmet outer surface;After welding personnel puts on a safety helmet, light sensor should be positioned at dead ahead, it is possible to the extraneous light intensity in sensing welding personnel front;After welding personnel puts on a safety helmet, puts on protective eye lens, reflective infrared photoelectric sensor is positioned at dead ahead, and transmitting tube points to protective eye lens;First dark slide is fixedly mounted on reflective infrared photoelectric sensor front, and length is longer than reflective infrared photoelectric sensor, it is ensured that the light source in welding personnel front is without interference with infrared photoelectric sensor;As welding personnel wears protective eye lens as safety device, protective eye lens upper surface and infrared photoelectric sensor opposite position, sticking reflector plate, the second dark slide is fixedly mounted on reflector plate front, it is ensured that the light source in welding personnel front will not be reflected sheet and reflex to infrared photoelectric sensor;It is placed with Zigbee communication module on doorway, cabin, is responsible for the information of Zigbee SOC(system on a chip) transmission in safety helmet, by wireless network output to Control Room。
Zigbee SOC(system on a chip) adopts the chip of CC2530 model, is contained within the single-chip microcomputer of 51 kernels。
Welding starts and detection process worn by safety helmet:
Single-chip microcomputer in Zigbee SOC(system on a chip) receives light sensor signal, confirms that welding starts。After single-chip microcomputer confirms that welding starts, first detection welding personnel whether safe wearing cap。Confirmation method is as follows: each welding personnel wears fixing safety helmet, is solidified with the identity information of these personnel in single-chip microcomputer;, and have 3-axis acceleration sensor inside this safety helmet;If these personnel do not wear a safety helmet, then safety helmet positional information, attitude information will not change;If these personnel have worn safety helmet, then in operation, the attitudes vibration of human body head can cause sensor to have information to export, and owing to adopting 3-axis acceleration sensor, head jitter can cause sensor to export;Owing to weld job personnel can not be totally stationary, therefore after personnel wear and put on a safety helmet, the information of 3-axis acceleration sensor output is continually changing;Therefore single-chip microcomputer Real-time Collection 3-axis acceleration sensor signal can be adopted, if it find that 3-axis acceleration sensor triple channel information does not all change in a period of time, then it is believed that the non-safe wearing cap of the welding personnel of correspondence;
Single-chip microcomputer, after confirming that welding starts, gathers 3-axis acceleration sensor information;3-axis acceleration sensor can defeated X, Y, Z tri-tunnel analog quantity or digital quantity signal, such as output analog signals, then send into the A/D mouth that chip carries, as output digital quantity signal may be connected directly to single-chip microcomputer;Single-chip microcomputer gathers three axle acceleration sensor Three-channel data at set intervals。Single-chip microcomputer passes through software design patterns enumerator, calculating single-chip microcomputer and gathers the number of times of 3-axis acceleration sensor data, all not changing if reaching set point number three circuit-switched data, then it is believed that the non-safe wearing cap of the welding personnel of correspondence;Single-chip microcomputer sends this personnel identity information by zigbee network, the character information of the non-safe wearing cap that characterizes these personnel, carries out remote alarms, and is recorded by Control Room and manages;If it find that any one channel data rate of change of 3-axis acceleration sensor exceedes the threshold value of artificial setting, then can determine that personnel are likely to fall down, then carry out reporting to the police, record and managing again by zigbee;
This is in gateway, each cabin, being mounted with Zigbee communication module, as via node, warning message is transferred to the Zigbee communication module of gateway, cabin by the single-chip microcomputer of the Zigbee SOC(system on a chip) in safety helmet, by this communication module, signal is successively uploaded, until total Control Room。
Hand shield or protective eye lens detection process:
In welding, welder adopts hand shield or wears protective eye lens to carry out arc light protection;
After confirming that welding personnel has worn safety helmet, scm software time delay, after scm software time delay, read light sensor information again, if light sensor no longer experiences arc light, then illustrate that welding personnel has taken up face shield, block lonely optical transport to light sensor;
If after single-chip microcomputer time delay, light sensor is had a high regard for can experience arc light, it is understood that there may be two kinds of situations: one is that welding personnel does not use hand screen, but is the use of protective eye lens;Two is that welding personnel had not both used hand shield, also without using protective eye lens;Therefore next step, carry out protective eye lens detection;The reflective infrared photoelectric sensor emission pipe installed on safety helmet points to welding personnel bridge of the nose place, protective eye lens surface above the bridge of the nose, sticking reflector plate, if welding personnel has worn protective eye lens, then reflective infrared electric transducer receives pipe and is able to receive that the infrared light of reflection;If welding personnel does not wear protective eye lens, then reflective infrared photoelectric sensor receives pipe and does not receive enough light intensity;In order to avoid arc light disturbs, at reflective infrared photoelectric sensor, reflector plate place, all fixedly mount light barrier;Single-chip microcomputer drives reflective infrared photoelectric sensor emission pipe by modulation system;, infrared receiving tube is connected to single-chip microcomputer through interface circuit, and single-chip microcomputer is the reflected signal of f by software detection frequency, thus adding system rejection to disturbance ability;
When single-chip microcomputer is continuously detected light sensor response, but reflection infrared sensor response it is not detected by, then can determine that welding personnel is both for using hand shield, protective eye lens is not used yet, then welding personnel identity, warning message are transferred to the Zigbee communication module of gateway, cabin by the single-chip microcomputer of the Zigbee SOC(system on a chip) in safety helmet, by this communication module, signal is successively uploaded, until total Control Room, it is achieved record and management。
The present invention is directed to hand shield, two kinds of welding protection articles for use of protective eye lens; have employed novel monitoring system; detected by MULTISENSOR INTEGRATION; judge whether practitioner uses weldering hand shield or protective eye lens, whether safe wearing cap, whether falls; as found, welding personnel does not use according to regulations weldering hand shield or protective eye lens, non-safe wearing cap; then identity code (such as job number) corresponding for these personnel and violation job information are sent to Control Room; report to the police, and for safety monitoring personnel record and management。
Beneficial effect based on the Ship Building and Repairing welding personnel telesecurity monitor and alarm system of multi-sensor information fusion of the present invention is mainly manifested in:
Highly versatile。Use be monitored for safety helmet the most frequently used in Ship Building and Repairing welding, hand screen, protective eye lens, when can effectively monitor welding personnel operation, do not wear a safety helmet, do not use welding mask or do not wear the violation operation phenomenon of protective eye lens。And welding personnel can be monitored fall state。
Cost is low, function is strong。Adopt cheap photoelectric sensor。Adopt Zigbee networking mode, it is achieved information remote transmitting。The Zigbee SOC(system on a chip) with single-chip microcomputer kernel is adopted to realize information processing。There is high performance-price ratio。
Intelligent energy degree is high。Adopt infrared photoelectric sensor, light sensor, 3-axis acceleration sensor multisensor to detect, by the comprehensive analysis to multi-sensor information, obtain safety protective tools wear condition in welding personnel welding process。
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described。
Fig. 1 is Ship Building and Repairing welding personnel telesecurity monitor and alarm system block diagram of the present invention;
Fig. 2 is Ship Building and Repairing welding personnel telesecurity monitor and alarm system program flow diagram of the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described。
A kind of long-range monitor and alarm system of Ship Welding personnel based on multi-sensor information fusion, it mainly comprises the following steps (with reference to Fig. 1): welding personnel safety helmet 1, Zgibee SOC(system on a chip) (being integrated with single-chip microcomputer kernel) 2, light sensor 3 and light sensor interface circuit 4, reflective infrared photoelectric sensor 5 and reflective infrared photoelectric sensor interface circuitry 6,3-axis acceleration sensor 7, reflector plate the 8, first dark slide the 9, second dark slide 10, protective eye lens 11, hand screen 12, Zigbee module 13。Zigbee SOC(system on a chip) (is integrated with single-chip microcomputer kernel), light sensor and light sensor interface circuit, reflective infrared photoelectric sensor and reflective infrared photoelectric sensor interface circuitry, the first dark slide 9,3-axis acceleration sensor are installed on welding personnel safety helmet。Wherein Zigbee SOC(system on a chip) (being integrated with single-chip microcomputer kernel), light sensor interface circuit, reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor are installed in welding personnel safety helmet。Light sensor, reflective infrared photoelectric sensor, dark slide 1 are fixedly mounted on outside welding personnel safety helmet。After welding personnel puts on a safety helmet, light sensor should be positioned at dead ahead, it is possible to the extraneous light intensity in sensing welding personnel front。After welding personnel puts on a safety helmet, puts on protective eye lens, reflective infrared photoelectric sensor is positioned at dead ahead, and transmitting tube points to protective eye lens。First dark slide is fixedly mounted on reflective infrared photoelectric sensor front, and length should be longer than reflective infrared photoelectric sensor, it is ensured that the light source in welding personnel front is without interference with infrared photoelectric sensor。As welding personnel wears protective eye lens as safety device, protective eye lens upper surface and infrared photoelectric sensor opposite position, sticking reflector plate, the second dark slide is fixedly mounted on reflector plate front, it is ensured that the light source in welding personnel front will not be reflected sheet and reflex to infrared photoelectric sensor。Owing to cabin mostly is the closing space of metal structure, for overcoming signal shielding, make information remote transmitting, be placed with Zigbee communication module on doorway, cabin, be responsible for the information of Zigbee SOC(system on a chip) transmission in safety helmet, by wireless network output to Control Room。
Zigbee SOC(system on a chip) (is integrated with single-chip microcomputer kernel), light sensor interface circuit, reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor are installed in welding personnel safety helmet, and concrete installation site is positioned at the personnel crown and safety helmet top casing gap。After welding personnel puts on a safety helmet, need to ensure that light sensor is positioned at dead ahead, and extraneous light intensity can be sensed。Reflective infrared photoelectric sensor also is located at dead ahead, and the infrared light of transmitting points to welding personnel bridge of the nose place。
After welding starts, light sensor senses strong arc light, and interface circuit produces signal intensity, and inputs the kernel single-chip microcomputer to Zigbee SOC(system on a chip), and Zigbee SOC(system on a chip) can adopt the chip of the models such as CC2530, is contained within the single-chip microcomputer of 51 kernels。
Welding starts and detection worn by safety helmet:
Single-chip microcomputer (hereinafter referred to as single-chip microcomputer) in Zigbee SOC(system on a chip) receives light sensor signal, confirms that welding starts。After single-chip microcomputer confirms that welding starts, first detection welding personnel whether safe wearing cap。Confirmation method is as follows: each welding personnel wears fixing safety helmet, is solidified with the identity information (such as job number) of these personnel, and has 3-axis acceleration sensor inside this safety helmet in single-chip microcomputer。If these personnel do not wear a safety helmet, then safety helmet positional information, attitude information will not change。If these personnel have worn safety helmet, then in operation, the attitudes vibration of human body head can cause sensor to have information to export, owing to selecting highly sensitive 3-axis acceleration sensor, even if very slight head jitter all can cause sensor to export。Owing to weld job personnel can not be totally stationary, therefore after personnel wear and put on a safety helmet, the information of 3-axis acceleration sensor output is continually changing。Therefore single-chip microcomputer Real-time Collection 3-axis acceleration sensor signal can be adopted, if it find that 3-axis acceleration sensor triple channel information does not all change in a period of time, then it is believed that the non-safe wearing cap of the welding personnel of correspondence。
Single-chip microcomputer, after confirming that welding starts, gathers 3-axis acceleration sensor information。3-axis acceleration sensor can defeated X, Y, Z tri-tunnel analog quantity or digital quantity signal, such as output analog signals, then send into the CC2530 A/D mouth carried, as output digital quantity signal may be connected directly to single-chip microcomputer。Single-chip microcomputer is (interval is Millisecond) at set intervals, gathers three axle acceleration sensor Three-channel data。Single-chip microcomputer passes through software design patterns enumerator, calculating single-chip microcomputer and gathers the number of times of 3-axis acceleration sensor data, all not changing if reaching set point number (such as 10 times) three circuit-switched data, then it is believed that the non-safe wearing cap of the welding personnel of correspondence。Single-chip microcomputer sends this personnel identity information by zigbee network, the character information of the non-safe wearing cap that characterizes these personnel, carries out remote alarms, and is recorded by Control Room and manages。If it find that any one channel data rate of change of 3-axis acceleration sensor exceedes the threshold value of artificial setting, then can determine that personnel are likely to fall down, then carrying out reporting to the police, record and managing again by zigbee, the method can monitor the fortuitous events such as welding personnel electric shock, races against time for rescuing。
Owing to cabin is for mostly being metal structure, signal is had stronger shielding action。Therefore in gateway, each cabin, being mounted with Zigbee communication module, as via node, warning message is transferred to the Zigbee communication module of gateway, cabin by the single-chip microcomputer of the Zigbee SOC(system on a chip) in safety helmet, by this communication module, signal is successively uploaded, until total Control Room。
Hand shield or protective eye lens detection:
In welding, the commonly used hand shield of welder or wear protective eye lens to carry out arc light protection。
After confirming that welding personnel has worn safety helmet, scm software time delay (after striking, pick up face shield needs the short period to welding personnel)。After scm software time delay, then read light sensor information, if light sensor no longer experiences arc light, then illustrate that welding personnel has taken up face shield, block lonely optical transport to light sensor。
If after single-chip microcomputer time delay, light sensor is had a high regard for can experience arc light, it is understood that there may be two kinds of situations: one is that welding personnel does not use hand screen, but is the use of protective eye lens。Two is that welding personnel had not both used hand shield, also without using protective eye lens。Therefore next step, will carry out protective eye lens detection。The reflective infrared photoelectric sensor emission pipe installed on safety helmet points to welding personnel bridge of the nose place。Protective eye lens surface above the bridge of the nose, sticks reflector plate, if welding personnel has worn protective eye lens, then reflective infrared electric transducer receives pipe and is able to receive that the infrared light of reflection。If welding personnel does not wear protective eye lens, then reflective infrared photoelectric sensor receives pipe and does not receive enough light intensity。In order to avoid arc light disturbs, at reflective infrared photoelectric sensor, reflector plate place, all fixedly mount light barrier。Single-chip microcomputer drives reflective infrared photoelectric sensor emission pipe (setting modulating frequency as f) by modulation system, infrared receiving tube is connected to single-chip microcomputer through interface circuit, single-chip microcomputer is the reflected signal of f by software detection frequency, thus adding system rejection to disturbance ability。
When single-chip microcomputer is continuously detected light sensor response, but reflection infrared sensor response it is not detected by, then can determine that welding personnel is both for using hand shield, protective eye lens is not used yet, then welding personnel identity (job number), warning message are transferred to the Zigbee communication module of gateway, cabin by the single-chip microcomputer of the Zigbee SOC(system on a chip) in safety helmet, by this communication module, signal is successively uploaded, until total Control Room, it is achieved record and management。

Claims (4)

1. a weld job wireless monitoring-alarming system, is characterized in that: includes welding personnel safety helmet, be integrated with the Zgibee SOC(system on a chip) of single-chip microcomputer kernel, light sensor and light sensor interface circuit, reflective infrared photoelectric sensor and reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor, reflector plate, the first dark slide, the second dark slide protective eye lens, hand screen, Zigbee module;Wherein be integrated with the Zigbee SOC(system on a chip) of single-chip microcomputer kernel, light sensor and light sensor interface circuit, reflective infrared photoelectric sensor and reflective infrared photoelectric sensor interface circuitry, the first dark slide, 3-axis acceleration sensor are installed on welding personnel safety helmet;Be integrated with single-chip microcomputer kernel Zigbee SOC(system on a chip), light sensor interface circuit, reflective infrared photoelectric sensor interface circuitry, 3-axis acceleration sensor are installed in welding personnel safety helmet;Light sensor, reflective infrared photoelectric sensor, the first dark slide are fixedly mounted on welding personnel safety helmet outer surface;After welding personnel puts on a safety helmet, light sensor should be positioned at dead ahead, it is possible to the extraneous light intensity in sensing welding personnel front;After welding personnel puts on a safety helmet, puts on protective eye lens, reflective infrared photoelectric sensor is positioned at dead ahead, and transmitting tube points to protective eye lens;First dark slide is fixedly mounted on reflective infrared photoelectric sensor front, and length is longer than reflective infrared photoelectric sensor, it is ensured that the light source in welding personnel front is without interference with infrared photoelectric sensor;As welding personnel wears protective eye lens as safety device, protective eye lens upper surface and infrared photoelectric sensor opposite position, sticking reflector plate, the second dark slide is fixedly mounted on reflector plate front, it is ensured that the light source in welding personnel front will not be reflected sheet and reflex to infrared photoelectric sensor;It is placed with Zigbee communication module on doorway, cabin, is responsible for the information of Zigbee SOC(system on a chip) transmission in safety helmet, by wireless network output to Control Room;
Welding starts and detection process worn by safety helmet:
Single-chip microcomputer in Zigbee SOC(system on a chip) receives light sensor signal, confirms that welding starts;After single-chip microcomputer confirms that welding starts, first detection welding personnel whether safe wearing cap;Confirmation method is as follows: each welding personnel wears fixing safety helmet, is solidified with the identity information of these personnel in single-chip microcomputer;, and have 3-axis acceleration sensor inside this safety helmet;If these personnel do not wear a safety helmet, then safety helmet positional information, attitude information will not change;If these personnel have worn safety helmet, then in operation, the attitudes vibration of human body head can cause sensor to have information to export, and owing to adopting 3-axis acceleration sensor, head jitter can cause sensor to export;Owing to weld job personnel can not be totally stationary, therefore after personnel wear and put on a safety helmet, the information of 3-axis acceleration sensor output is continually changing;Therefore single-chip microcomputer Real-time Collection 3-axis acceleration sensor signal can be adopted, if it find that 3-axis acceleration sensor triple channel information does not all change in a period of time, then it is believed that the non-safe wearing cap of the welding personnel of correspondence;
Single-chip microcomputer, after confirming that welding starts, gathers 3-axis acceleration sensor information;3-axis acceleration sensor can defeated X, Y, Z tri-tunnel analog quantity or digital quantity signal, such as output analog signals, then send into the A/D mouth that chip carries, as output digital quantity signal may be connected directly to single-chip microcomputer;Single-chip microcomputer gathers three axle acceleration sensor Three-channel data at set intervals;Single-chip microcomputer passes through software design patterns enumerator, calculating single-chip microcomputer and gathers the number of times of 3-axis acceleration sensor data, all not changing if reaching set point number three circuit-switched data, then it is believed that the non-safe wearing cap of the welding personnel of correspondence;Single-chip microcomputer sends this personnel identity information by zigbee network, the character information of the non-safe wearing cap that characterizes these personnel, carries out remote alarms, and is recorded by Control Room and manages;If it find that any one channel data rate of change of 3-axis acceleration sensor exceedes the threshold value of artificial setting, then can determine that personnel are likely to fall down, then carry out reporting to the police, record and managing again by zigbee;
This is in gateway, each cabin, being mounted with Zigbee communication module, as via node, warning message is transferred to the Zigbee communication module of gateway, cabin by the single-chip microcomputer of the Zigbee SOC(system on a chip) in safety helmet, by this communication module, signal is successively uploaded, until total Control Room。
2. weld job wireless monitoring-alarming system according to claim 1, is characterized in that: Zigbee SOC(system on a chip) adopts the chip of CC2530 model, is contained within the single-chip microcomputer of 51 kernels。
3. weld job wireless monitoring-alarming system according to claim 1, is characterized in that: described personnel identity information is job number。
4. weld job wireless monitoring-alarming system according to claim 1, is characterized in that: single-chip microcomputer drives reflective infrared photoelectric sensor emission pipe by modulation system, and modulating frequency is f。
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