CN102353320A - Temperature sensing cable ranging method and range finder - Google Patents
Temperature sensing cable ranging method and range finder Download PDFInfo
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- CN102353320A CN102353320A CN2011101875308A CN201110187530A CN102353320A CN 102353320 A CN102353320 A CN 102353320A CN 2011101875308 A CN2011101875308 A CN 2011101875308A CN 201110187530 A CN201110187530 A CN 201110187530A CN 102353320 A CN102353320 A CN 102353320A
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- temperature sensing
- sensing cable
- resistance
- distance
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Abstract
The invention, which belongs to the fire control product field, relates to a temperature sensing cable ranging method and a range finder. A temperature sensing cable ranging method is characterized by: vertically cutting a temperature sensing cable at a beginning part or a terminal or any part in the middle of the temperature sensing cable and exposing two metal inner cores; taking the two exposed metal inner cores as measuring ends to measuring a resistance of the two ends; using a measured resistance value to convert a distance from a measuring point to a short circuit point of the temperature sensing cable. The range finder which applies the temperature sensing cable ranging method comprises: a resistance measuring circuit, a resistance distance converting circuit, a digital display module and a power supply module. In the method of the invention, the resistance value between the short circuit point of the temperature sensing cable and the measuring point is tested; a linear relation is performed to the resistance value so as to obtain a length. Therefore, the distance between the short circuit point and the measuring point can be obtained. The short circuit point of the temperature sensing cable can be rapidly and accurately found. Then maintenance can be performed. A large amount of economic costs can be saved.
Description
Technical field
The present invention relates to a kind of temperature sensing cable distance-finding method and stadimeter, relate in particular to a kind of easy temperature sensing cable distance-finding method and stadimeter.
Background technology
The beyond retrievable temperature sensing cable is a kind of fire protection warning equipment; In fire-fighting domain, use very extensively at present; It is made up of two elastic metallic inner cores of centre temperature-sensitive insulating material outer with being wrapped in the elastic metallic heart yearn, relies on its temperature-sensitive insulating material to be heated to melt back two inner cores to touch the principle that forms short circuit together and sends fire alarm signal.But after the temperature-sensitive insulating material melts, can't recover, perhaps temperature sensing cable receives bigger external force and does the time spent and also can make the temperature-sensitive insulating material impaired, therefore can form permanent short dot.If want to continue to use, have only the excision of that section of short dot cable could be continued to use after the connection more again.And if the temperature sensing cable outward appearance is good, inner impaired, only five senses with the maintenance personal are difficult to search out short dot, at this moment just have to whole section temperature sensing cable is discarded, therefore can cause bigger economic waste.In addition,, search potential safety hazard, guarantee fire safety if can find short-circuit alarming point also to help to understand warning reason exactly.The special-purpose console panel configuration of the external import fire-fighting of only a few temperature sensing cable stadimeter is only arranged at present; But be merely able to show the distance between short dot and the temperature sensing cable top; The parasang minimum that shows is a rice; Can't be shown to more accurate unit; And stadimeter all is to combine or fixedly mount certain point at the scene with main frame; Not only big but also can not move, can't carry at any time and measure.
Summary of the invention
Technical matters to be solved by this invention provides a kind of temperature sensing cable distance-finding method and stadimeter; It is limited to solve present distance-finding method and stadia surveying place, and Measuring Time is limited, and the two ends of measuring distance are limited; And measurement of factor, can not carry the defective of measurement at any time.
Technical scheme
A kind of temperature sensing cable distance-finding method; It is characterized in that: the top or terminal or the middle any place's cutting perpendicularly temperature sensing cable that are included in temperature sensing cable; The step of exposing two metal inner cores of temperature sensing cable; Measure the step of the resistance between two ends as measuring junction with two metal inner cores that expose on the temperature sensing cable; Convert from the step of the distance of the short dot of measurement point to temperature sensing cable from the resistance value that measures; Said from the step of the resistance value scaled distance that measures; The method that converts is at first to test the metal inner core resistance of temperature sensing cable and the linear scale factor of length; Use this coefficient then; Resistance between the metal inner core two ends that record is converted to the length of metal inner core; Because the short-circuit point of temperature sensing cable makes two metal inner core series connection of temperature sensing cable, therefore the length of conversion is the distance from the measurement point to the short dot.
A kind of stadimeter of using above-mentioned temperature sensing cable distance-finding method; It is characterized in that: comprise that resistance measuring circuit, resistance are apart from change-over circuit, digital display module and power module; Said resistance measuring circuit comprises two external measurement gauge heads and internal measurement circuit; The output terminal of resistance measuring circuit links to each other with the input end of resistance apart from change-over circuit; Export measurement data to resistance apart from change-over circuit; Resistance converts the resistance value of measuring into distance value apart from change-over circuit; And export digital display module to; Be presented on the instrument panel, power module provides power supply.
Said resistance comprises resistance apart from linear conversion proportion input interface apart from change-over circuit, adopts the linear scaling circuit to change.
Said resistance measuring circuit adopts ohmmeter circuit or bridge diagram or other dc resistance measurement circuits, and input end adopts table bar type or socket type.
The power supply of said power module adopts rechargeable battery or dry cell.
Beneficial effect
Temperature sensing cable distance-finding method of the present invention utilizes resistance and the characteristic that length is the linear ratio relation of the metal inner core of temperature sensing cable; With the short dot of beyond retrievable temperature sensing cable two metal inner cores of temperature sensing cable are chained together; Adopt resistance measuring circuit to form a loop measurement temperature sensing cable and obtain resistance value; Adopt linear relationship to obtain length this resistance value; Can obtain the distance between short dot and the measurement point; Thereby find the short dot of temperature sensing cable to keep in repair quickly and accurately; To use this kind method manufacturing small-sized electric meter; Be easy to carry; Can be directly at the scene to temperature sensing cable a bit measure arbitrarily and show measurement point between the short dot apart from length; And higher precision is arranged; Make the maintenance personal can find short dot quickly and easily; Understand the temperature sensing cable warning reason; Recover the use of temperature sensing cable then; Safeguard the fire-fighting fire alarm system faster and betterly, and saved a large amount of financial cost.
Description of drawings
Fig. 1 is beyond retrievable temperature sensing cable structural representation among the present invention;
Fig. 2 is a principle of the invention synoptic diagram;
Fig. 3 is a rig-site utilization synoptic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, further set forth the present invention.
Metal inner core 5 and the heat-sensitive layer 6 that outward cover and whole of beyond retrievable temperature sensing cable in the middle of comprising wraps in outer field insulation course 7, is depicted as the structural representation of beyond retrievable temperature sensing cable like accompanying drawing 1.
Because the inner core material of beyond retrievable temperature sensing cable is an elastic metallic; Elastic metallic all has certain resistivity; The elastic metallic that is unit length has certain resistance value; And the resistance value linear relationship that is directly proportional with temperature sensing cable length; For example through measuring, the resistance value that general temperature sensing cable approximately is 1.5 meters～2.0 meters cables is 1 ohm (resistance values of two metal inner cores).Therefore when utilizing resistance value and the linear relationship between the length measured more arbitrarily from temperature sensing cable can calculate the length distance between measurement point and the short dot.Such as there being one section 500 meters long temperature sensing cable to send alerting signal; Under the temperature sensing cable off-line state; The resistance value that records temperature sensing cable top is 78 ohm; Just can pass through formula: the distance that measurement point is selected to short-circuit alarming=resistance value * linear coefficient=78*1.5=117 rice calculates respective.
A kind of temperature sensing cable distance-finding method; Be included in top or terminal or middle any place's cutting perpendicularly temperature sensing cable of temperature sensing cable; The step of exposing two metal inner cores of temperature sensing cable; Measure the step of the resistance between two ends with two metal inner cores exposing on the temperature sensing cable as measuring junction, convert from the step of the distance of the short dot of measurement point to temperature sensing cable from the resistance value that measures.
Said from the step of the resistance value scaled distance that measures; The method that converts is at first to test the metal inner core resistance of temperature sensing cable and the linear scale factor of length; Use this coefficient then; Resistance between the metal inner core two ends that record is converted into the length of metal inner core; Because the short-circuit point of temperature sensing cable makes two metal inner core series connection of temperature sensing cable, therefore the length of conversion is the distance from the measurement point to the short dot.
Temperature sensing cable stadimeter according to the said method design; Comprise that resistance measuring circuit 1, resistance are apart from change-over circuit 2, digital display module 3 and power module 4; Said resistance measuring circuit 1 comprises two external measurement gauge heads and internal measurement circuit; The output terminal of resistance measuring circuit links to each other with the input end of resistance apart from change-over circuit 2; Export measurement data to resistance apart from change-over circuit 2; Resistance converts the resistance value of measuring into distance value apart from change-over circuit 2; And export digital display module 3 to; Be presented on the instrument panel, power module 4 provides power supply.
Said resistance measuring circuit 1 adopts the ohmmeter circuit, and input end adopts table bar type or socket type, also can adopt bridge diagram or other dc resistance measurement circuits, and the output result is the analog quantity or the digital quantity that can reflect tested temperature sensing cable resistance sizes.
The kind of temperature sensing cable is numerous; Metal inner core 5 is also different; But so long as can confirm its linear relationship the time with resistance and distance; Resistance is provided with resistance apart from linear conversion proportion input interface apart from change-over circuit 2; Adopt the linear scaling circuit; Even have different linear scalings, still can behind the correct proportions after the test, measure in input.Resistance can be that analog quantity also can be a digital quantity apart from the output of change-over circuit 2; Output terminal links to each other with the input end of digital display module 3; Numeral display module 3 is made up of A/D converter and device for digit-displaying; If input is an analog quantity; A/D converter converts analog signals to digital signal and through device for digit-displaying end product is shown then, if input is digital quantity then directly demonstrates last length distance through device for digit-displaying.Through the parameter setting in the regulating circuit, can adjust the precision of last display result, precision can be rice, 0.1 meter, 0.01 meter or littler unit.The power supply of whole device is supplied with by power module 4, and the power supply of power module 4 adopts rechargeable battery or dry cell.
As shown in Figure 3; On-the-spot certain section temperature sensing cable sends the short-circuit alarming signal; The temperature sensing cable outward appearance is good; Rely on people's vision and sense of touch can't find short dot; Utilize apparatus of the present invention to measure at the top or the terminal of temperature sensing cable; Perhaps measure from any 1 A of temperature sensing cable; Resistance value between two of thermometrically end points place are metal-cored; Because the short circuit of short dot; Two form the loop between metal-cored; Resistance value between promptly can be according to two that record metal-cored obtains the distance of this place's measurement point to short dot, thereby finds short dot according to the distance value that demonstrates.
Claims (5)
1. temperature sensing cable distance-finding method; It is characterized in that: the top or terminal or the middle any place's cutting perpendicularly temperature sensing cable that are included in the beyond retrievable temperature sensing cable; The step of exposing two metal inner cores of temperature sensing cable; Measure the step of the resistance between two ends as measuring junction with two metal inner cores that expose on the temperature sensing cable; Convert from the step of the distance of the short dot of measurement point to temperature sensing cable from the resistance value that measures; Said from the step of the resistance value scaled distance that measures; The method that converts is at first to test the metal inner core resistance of temperature sensing cable and the linear scale factor of length; Use this coefficient then; Resistance between the metal inner core two ends that record is converted to the length of metal inner core; Because the short-circuit point of temperature sensing cable makes two metal inner core series connection of temperature sensing cable, therefore the length of conversion is the distance from the measurement point to the short dot.
2. stadimeter of using temperature sensing cable distance-finding method as claimed in claim 1; It is characterized in that: comprise resistance measuring circuit (1); Resistance is apart from change-over circuit (2); Numeral display module (3) and power module (4); Said resistance measuring circuit (1) comprises two external measurement gauge heads and internal measurement circuit; The output terminal of resistance measuring circuit links to each other with the input end of resistance apart from change-over circuit (2); Export measurement data to resistance apart from change-over circuit (2); Resistance converts the resistance value of measuring into distance value apart from change-over circuit (2); And export digital display module (3) to; Be presented on the instrument panel, power module (4) provides power supply.
3. the stadimeter of temperature sensing cable as claimed in claim 3, it is characterized in that: said resistance comprises resistance apart from linear conversion proportion input interface apart from change-over circuit (2), adopts the linear scaling circuit to change.
4. the stadimeter of temperature sensing cable as claimed in claim 1 or 2 is characterized in that: said resistance measuring circuit (1) employing ohmmeter circuit or bridge diagram or other dc resistance measurement circuits, input end employing table bar type or socket type.
5. the stadimeter of temperature sensing cable as claimed in claim 1 or 2 is characterized in that: the power supply employing rechargeable battery or the dry cell of said power module (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101875308A CN102353320A (en) | 2011-07-06 | 2011-07-06 | Temperature sensing cable ranging method and range finder |
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| CN2011101875308A CN102353320A (en) | 2011-07-06 | 2011-07-06 | Temperature sensing cable ranging method and range finder |
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| CN2011101875308A Pending CN102353320A (en) | 2011-07-06 | 2011-07-06 | Temperature sensing cable ranging method and range finder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778631A (en) * | 2012-08-13 | 2012-11-14 | 重庆大学 | Method for detecting and accurately positioning leakage of a sensing cable based on partial pressure compensation |
| CN104596458A (en) * | 2014-10-27 | 2015-05-06 | 徐工集团工程机械股份有限公司 | Conductor length sensor and conductor length measuring method |
| CN114639882A (en) * | 2022-03-07 | 2022-06-17 | 广州鹏辉能源科技股份有限公司 | Battery package thermal runaway protection system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778631A (en) * | 2012-08-13 | 2012-11-14 | 重庆大学 | Method for detecting and accurately positioning leakage of a sensing cable based on partial pressure compensation |
| CN102778631B (en) * | 2012-08-13 | 2014-06-18 | 重庆大学 | Method for detecting and accurately positioning leakage of a sensing cable based on partial pressure compensation |
| CN104596458A (en) * | 2014-10-27 | 2015-05-06 | 徐工集团工程机械股份有限公司 | Conductor length sensor and conductor length measuring method |
| CN104596458B (en) * | 2014-10-27 | 2017-10-27 | 徐工集团工程机械股份有限公司 | A kind of bracing wire linear transducer and bracing wire length measurement method |
| CN114639882A (en) * | 2022-03-07 | 2022-06-17 | 广州鹏辉能源科技股份有限公司 | Battery package thermal runaway protection system |
| CN114639882B (en) * | 2022-03-07 | 2024-04-16 | 广州鹏辉能源科技股份有限公司 | Battery Bao Re runaway protection system |
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Application publication date: 20120215 |