CN104864953A - Lightening-proof method of electronic weighing instrument - Google Patents
Lightening-proof method of electronic weighing instrument Download PDFInfo
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- CN104864953A CN104864953A CN201410060417.7A CN201410060417A CN104864953A CN 104864953 A CN104864953 A CN 104864953A CN 201410060417 A CN201410060417 A CN 201410060417A CN 104864953 A CN104864953 A CN 104864953A
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- ground
- load cells
- stud
- electronic weighing
- weighing instrument
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Abstract
The invention provides a lightening-proof method of an electronic weighing instrument, and belongs to the technical field of electronic weighing instrument application. The lightening-proof method of the electronic weighing instrument comprises the following steps that: (1) a whole weighing platform is grounded, and that is to say, one or a plurality of grounding cables are used to connect the weighing platform with a grounded pile, the grounded pile is knocked into a zero zone with a constant potential, and grounding resistance is lower than 4 ohm; (2) each weighing sensor is provided with protective grounding; and (3) a shielding layer of a signal cable of each weighing sensor is grounded. All key parts of an electronic weighing instrument system are grounded in different manners, so that the whole electronic weighing instrument system is protected from being damaged by lightening, the safe operation of the electronic weighing instrument system is ensured, the operation reliability of equipment is improved, the maintenance cost is lowered, and the economic benefit of an enterprise is increased.
Description
Technical field
The invention belongs to electronic scale security fields, be applied to the various automobile with electronic sensor, train measuring weighing instrument system.
Background technology
Electronic scale utilizes " power-electricity " shift theory, is the measurement instrument of the meausring apparatus of electricity, is generally made up of the quality conversion of non electrical quantity weighting platform, LOAD CELLS, terminal box, measurement Displaying Meter, computer system, printer and power supply etc.
Thunder and lightning is the common electric discharge phenomena of a kind of nature, and it has great destructive power.Full-sized car, train electronic scale are generally all in outdoor open space, the band large-scale metal such as weighing platform and rail component very easily suffers lightening strikes, thus sensor under making to be arranged on weighing platform and coupled secondary instrument and corresponding computer system, suffer the attack of thunder and lightning and damage.
The every thunderstorm season of smelter, has electronic scale to be damaged because being struck by lightning, and even electronic scale entirety is destroyed.The economic loss caused to enterprise of being once struck by lightning can reach several ten thousand to hundreds of thousands unit, and be more seriously make corporate reputation impaired, indirect loss cannot be estimated.Thunderbolt, both have impact on the normal production and operating activities of enterprise, enterprise is suffered indirectly economic loss, damaged again electronic weighing apparatus system simultaneously, cause direct economic loss to enterprise, therefore will hit device to weighing apparatus system mounted with lightning protection, ensure that the safety of electronic weighing apparatus system is normal and run.
Summary of the invention
The object of the invention is, by electronic weighing apparatus system mounted with lightning protection device, to ensure the safe operation of electronic weighing apparatus system, improve the reliable rate of equipment, reduce the economic loss of enterprise.
Technical scheme of the present invention:
Prevent to make electronic weighing apparatus system being struck by lightning, the present invention proposes following scheme:
1, by whole weighing platform ground connection, be namely connected with ground stud by scale body with one or several earthing cable, ground stud will be beaten in 0th constant district of current potential, and stake resistance is less than 4 ohm;
2, each sensor is equipped with protective ground; Namely each sensing station arranges a ground wire, sensor and " " between ground stud is set, ground wire and ground stud carry out being connected or are connected with foot bolt nearby by ground wire; Side by side foot bolt must be connected with reinforcing bar grounded screen in basis;
3, the shielding layer grounding of load cell signal cable; The signal wire of LOAD CELLS adopts the cable of shielding layer grounding to be connected with the current power supply line of excitation LOAD CELLS, and the screen layer of load cell signal cable is connected with the ground wire of LOAD CELLS, or is connected with the ground stud of weight display;
4, case of weighting display instrument ground connection; Namely in on-ground weigher room, establish ground stud, ground stud is connected with ground rebar net in the basis of scale, when adopting plastic casing, and should surface spraying layer of metal film ground connection more in the enclosure.
Beneficial effect of the present invention:
1, the present invention is by analyzing each key factor of composition weighing apparatus system, adopt the mode of different ground connection respectively, prevent because being struck by lightning in local or multiple position, whole weighing apparatus system is wrecked, ensure the safe operation of electronic weighing apparatus system, the reliable rate of raising equipment, lowers maintenance cost.
2, the present invention is to each key position device ground wire, and install simple, cost is low, effective, economic and practical.
Embodiment
Carry out earth mat laying during weighting platform foundation construction, at outdoor, indoor location ground stud, weighting platform, sensor, weighing-up wave line screen layer, meter case are connected with earth mat, foot bolt, ground stud respectively.
1, by whole weighing platform ground connection, be namely connected with ground stud by scale body with one or several earthing cable, ground stud will be beaten in 0th constant district of current potential, and stake resistance is less than 4 ohm.
Had spacious big current return flow line between weighing platform and ground stud, then, when electrostatic induction, can supplement electronics make it neutralize from the earth, producing after noble potential at equipment can rapid evacuation and unlikely damage electronic scale.
2, each LOAD CELLS is equipped with protective ground.Namely a ground wire to be set in each LOAD CELLS position, LOAD CELLS and " " between ground stud is set, ground wire and ground stud carry out being connected or are connected with foot bolt nearby by ground wire; Side by side foot bolt must be connected with reinforcing bar grounded screen in basis.
3, the screen layer of load cell signal cable wants ground connection.When electronic scale is powered by utility grid, have a very long segment distance from switchgear building to installation, weighing platform also has the signal cable of one section of longer distance to scale room, be not difficult to imagine, thunderbolt is by electromagnetic induction approach, and lead-in wire induces one noble potential, just likely causes the damage of weighing instrument.
Therefore, the signal wire of LOAD CELLS adopts the cable of shielding layer grounding to be connected with the current power supply line of excitation LOAD CELLS, destroys to eliminate electromagnetic induction thunderbolt or causes the possibility fired.The screen layer of load cell signal cable is connected with the ground wire of LOAD CELLS, or is connected with the ground stud of weight display.
4, case of weighting display instrument ground connection.Namely in on-ground weigher room, establish ground stud, and be connected with ground rebar net in the basis of scale; When case of weighting display instrument is plastic casing, should surface spraying layer of metal film ground connection more in the enclosure.
Claims (1)
1. the anti-lightning strike method of electronic scale, comprises following content:
(1), by whole weighing platform ground connection, be namely connected with ground stud by scale body with one or several earthing cable, ground stud will be beaten in 0th constant district of current potential, and stake resistance is less than 4 ohm;
(2), each LOAD CELLS is equipped with protective ground; Namely a ground wire is set in each LOAD CELLS position, LOAD CELLS and " " between ground stud is set, ground wire and ground stud carry out being connected or are connected with foot bolt nearby by ground wire; Side by side foot bolt must be connected with reinforcing bar grounded screen in basis;
(3), the shielding layer grounding of load cell signal cable; The signal wire of LOAD CELLS adopts the cable of shielding layer grounding to be connected with the current power supply line of excitation LOAD CELLS, and the screen layer of load cell signal cable is connected with the ground wire of LOAD CELLS, or is connected with the ground stud of weight display;
(4), case of weighting display instrument ground connection; Namely in on-ground weigher room, establish ground stud, ground stud is connected with ground rebar net in the basis of scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060417.7A CN104864953A (en) | 2014-02-24 | 2014-02-24 | Lightening-proof method of electronic weighing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060417.7A CN104864953A (en) | 2014-02-24 | 2014-02-24 | Lightening-proof method of electronic weighing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104864953A true CN104864953A (en) | 2015-08-26 |
Family
ID=53910942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410060417.7A Pending CN104864953A (en) | 2014-02-24 | 2014-02-24 | Lightening-proof method of electronic weighing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104864953A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940406A (en) * | 2019-11-29 | 2020-03-31 | 武汉市六顺标准衡器有限公司 | Electronic truck scale weighing system based on Internet of things technology and lightning protection method |
| CN111103047A (en) * | 2019-12-26 | 2020-05-05 | 四川石油天然气建设工程有限责任公司 | Weighing system for barite powder storage tank |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917981A (en) * | 1973-06-07 | 1975-11-04 | Colt Ind Operating Corp | Scale lightning protection system |
| CA2287583A1 (en) * | 1999-10-25 | 2001-04-25 | Scaleco | Weighing device |
| CN2553352Y (en) * | 2002-07-19 | 2003-05-28 | 梅特勒-托利多(常州)称重设备系统有限公司 | Protecting device for weighing equipment |
| CN2831572Y (en) * | 2005-07-11 | 2006-10-25 | 深圳锦天乐防雷技术有限公司 | Lightning protector of electronic weigher |
| CN102889921A (en) * | 2012-10-18 | 2013-01-23 | 台衡精密测控(昆山)股份有限公司 | Lightning protection structure of electronic weighing instrument |
| CN202856331U (en) * | 2012-10-19 | 2013-04-03 | 深圳市杰赛电子有限公司 | Electronic wagon balance lightning protection case |
-
2014
- 2014-02-24 CN CN201410060417.7A patent/CN104864953A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917981A (en) * | 1973-06-07 | 1975-11-04 | Colt Ind Operating Corp | Scale lightning protection system |
| CA2287583A1 (en) * | 1999-10-25 | 2001-04-25 | Scaleco | Weighing device |
| CN2553352Y (en) * | 2002-07-19 | 2003-05-28 | 梅特勒-托利多(常州)称重设备系统有限公司 | Protecting device for weighing equipment |
| CN2831572Y (en) * | 2005-07-11 | 2006-10-25 | 深圳锦天乐防雷技术有限公司 | Lightning protector of electronic weigher |
| CN102889921A (en) * | 2012-10-18 | 2013-01-23 | 台衡精密测控(昆山)股份有限公司 | Lightning protection structure of electronic weighing instrument |
| CN202856331U (en) * | 2012-10-19 | 2013-04-03 | 深圳市杰赛电子有限公司 | Electronic wagon balance lightning protection case |
Non-Patent Citations (2)
| Title |
|---|
| 刘同海等: "谈谈电子衡器的防雷击设计", 《衡器》 * |
| 肖道通: "大型全电子衡器安装中的接地保护", 《计量技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940406A (en) * | 2019-11-29 | 2020-03-31 | 武汉市六顺标准衡器有限公司 | Electronic truck scale weighing system based on Internet of things technology and lightning protection method |
| CN110940406B (en) * | 2019-11-29 | 2021-04-16 | 武汉市六顺标准衡器有限公司 | Electronic truck scale weighing system based on Internet of things technology and lightning protection method |
| CN111103047A (en) * | 2019-12-26 | 2020-05-05 | 四川石油天然气建设工程有限责任公司 | Weighing system for barite powder storage tank |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |