CN2709960Y - Analogue line measuring cable probe with automatic heating and detecting function - Google Patents
Analogue line measuring cable probe with automatic heating and detecting function Download PDFInfo
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- CN2709960Y CN2709960Y CN 200420059716 CN200420059716U CN2709960Y CN 2709960 Y CN2709960 Y CN 2709960Y CN 200420059716 CN200420059716 CN 200420059716 CN 200420059716 U CN200420059716 U CN 200420059716U CN 2709960 Y CN2709960 Y CN 2709960Y
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- transmission cable
- temperature
- electrically connected
- sensitive transmission
- power supply
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Abstract
The utility model relates to an analogue line measuring cable probe with automatic heating and detecting functions, which is provided with a starting end box, a terminal box, a temperature sensing transmission cable L1 and a temperature sensing transmission cable L2. The utility model is characterized in that a starting end resistor R1 is arranged in the starting end box, one end of the starting end resistor is electrically connected with the temperature sensing transmission cable L1, and the other end is electrically connected with an earth pole terminal of a power supply via a normally closed switch K1. The temperature sensing transmission cable L1 is electrically connected with a positive terminal of the power supply via a normally opened switch K4, the temperature sensing transmission cable L2 is electrically connected with the positive terminal of the power supply via a normally closed switch K2, and the temperature sensing transmission cable L2 is electrically connected with the earth pole terminal of the power supply via a normally opened switch K3. A temperature sensing element R, a terminal resistor R2 and a diode D1 are in parallel connection between the temperature sensing transmission cable L1 and the temperature sensing transmission cable L2, a terminal resistor R2 and the diode D1 are arranged in the terminal box, and a detection point A is arranged on the temperature sensing transmission cable L1.
Description
Technical field
The utility model relates to and a kind ofly having from heating the analog linear cable formula detector of self-checking function, and this this detector can utilize self-powered and heater circuit to finish the heating of temperature-sensing element, and the serviceability of temperature-sensitive transmission cable and temperature-sensing element is carried out self check.
Background technology
Analog linear cable formula detector is the important fire sensor of automatic fire alarm system, and its principle of work all is to come the perception fire information according to the temperature variations of environment of living in.Fig. 1 is the detection principle figure of traditional analog linear fire detector, it is made of top box 1, termination box 3, two temperature-sensitive transmission cables 2, be provided with in the top box top resistance R 10, check point A1, gate terminal, positive terminal, be provided with terminal resistance R20 in the termination box, between two temperature-sensitive transmission cables, be provided with temperature-sensing element R40, this temperature-sensing element is equivalent to a variable resistor, and its resistance value changes with variation of temperature.This detector uses 24 volts of direct supplys, and during temperature variation, temperature-sensing element R40 resistance changes, and A1 point potential value changes thereupon, and surveying instrument (being commonly referred to microcomputer head or microcomputer modulator) is judged the state of fire according to the variation of the A point current potential that records.Traditional detector has two kinds, and what Fig. 1 showed is a kind of single-point current potential detector.Fig. 2 is the detection principle figure of traditional 2 potential difference (PD) fire detectors, it is made of top box 1, termination box 3, two temperature-sensitive transmission cables 2, be provided with top resistance R 10, check point A1, positive terminal resistance R 30, check point B1 in the top box, be provided with terminal resistance R20 in the termination box, between two temperature-sensitive transmission cables, be provided with temperature-sensing element R40.There is following deficiency in traditional detector: safeguards use or detects in the course of receiving to judge whether detector can need utilize extraneous thermal source to heat to detector by Normal Alarm, and workload is big, and easy tamper detection device.Therefore, need to propose a kind of analog linear cable formula detector that heats self-checking function certainly that has.
Summary of the invention
The purpose of this utility model is to provide a kind of to be had from the analog linear cable formula detector that heats self-checking function, this detector can utilize self-powered and heater circuit to finish the heating of temperature-sensing element, and the serviceability of temperature-sensitive transmission cable and temperature-sensing element is carried out self check.
The purpose of this utility model is realized by following technical proposals: a kind of have from the analog linear cable formula detector that heats self-checking function, by the top box, termination box, temperature-sensitive transmission cable L1, temperature-sensitive transmission cable L2 constitutes, it is characterized in that: be provided with top resistance R 1 in the described top box, one end of this top resistance is electrically connected with described temperature-sensitive transmission cable L1, the other end is electrically connected with the ground gate terminal of power supply by a normally closed switch K1, described temperature-sensitive transmission cable L1 is electrically connected with the positive terminal of power supply by a normal open switch K4, described temperature-sensitive transmission cable L2 is electrically connected with the positive terminal of power supply by a normally closed switch K2, described temperature-sensitive transmission cable L2 is electrically connected with the ground gate terminal of power supply by a normal open switch K3, be parallel with temperature-sensing element R between described temperature-sensitive transmission cable L1 and the temperature-sensitive transmission cable L2, terminal resistance R2, diode D1, described terminal resistance R2 and diode D1 are installed in the described termination box, and described temperature-sensitive transmission cable L1 is provided with check point A.
Compared with the prior art the utility model has and can utilize self-powered and heater circuit to finish the heating of temperature-sensing element, the advantage that the serviceability of temperature-sensitive transmission cable and temperature-sensing element is carried out self check, and can not cause the damage of temperature-sensing element.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1, be the detection principle figure of traditional analog linear fire detector
Fig. 2, be the detection principle figure of traditional 2 potential difference (PD) fire detectors
Fig. 3, structural representation of the present utility model
Two the structural representation of Fig. 4, embodiment of the present utility model
Embodiment
Referring to Fig. 3, the analog linear cable formula detector of one of present embodiment, by top box 10, termination box 30, temperature sensing cable part 20 constitutes, temperature sensing cable partly comprises temperature-sensitive transmission cable L1, temperature-sensitive transmission cable L2, be provided with top resistance R 1 in the described top box, one end of this top resistance is electrically connected with described temperature-sensitive transmission cable L1, the other end is electrically connected with the ground gate terminal G of power supply by a normally closed switch K1, described temperature-sensitive transmission cable L1 is electrically connected with the positive terminal V of power supply by a normal open switch K4, described temperature-sensitive transmission cable L2 is electrically connected with the positive terminal of power supply by a normally closed switch K2, described temperature-sensitive transmission cable L2 is electrically connected with the ground gate terminal of power supply by a normal open switch K3, be parallel with temperature-sensing element R between described temperature-sensitive transmission cable L1 and the temperature-sensitive transmission cable L2, terminal resistance R2, diode D1, described terminal resistance R2 and diode D1 are installed in the described termination box, and described temperature-sensitive transmission cable L1 is provided with check point A.Described temperature-sensing element R is equivalent to a variable resistor, and its resistance value changes with variation of temperature.When temperature variation, the resistance of temperature-sensing element R will change, and A point potential value changes thereupon.Present embodiment uses 24 volts of direct supplys (DC24V).Present embodiment is a kind of single-point current potential detector.
In the present embodiment, be provided with check point A on top resistance R 1, normally closed switch K1, normally closed switch K2, normal open switch K3, normal open switch K4, the temperature-sensitive transmission cable L1 in the top box.Be provided with terminal resistance R2 and diode D1 in the termination box.
Referring to Fig. 4, two of present embodiment is a kind of 2 potential difference (PD) detectors, and this detector is made of top box 10, termination box 30, temperature sensing cable part 20, and temperature sensing cable partly comprises temperature-sensitive transmission cable L1, temperature-sensitive transmission cable L2.Present embodiment is the improvement on the basis of embodiment one, with the same section of embodiment one be: be provided with top resistance R 1 in the described top box, one end of this top resistance is electrically connected with described temperature-sensitive transmission cable L1, the other end is electrically connected with the ground gate terminal G of power supply by a normally closed switch K1, described temperature-sensitive transmission cable L2 is electrically connected with the ground gate terminal of power supply by a normal open switch K3, be parallel with temperature-sensing element R between described temperature-sensitive transmission cable L1 and the temperature-sensitive transmission cable L2, terminal resistance R2, diode D1, described temperature-sensitive transmission cable L1 is provided with check point A.The parts different with embodiment one are: also be provided with positive terminal resistance R 3 in the described top box, one end of this resistance is electrically connected with the positive terminal V of described power supply, the other end is electrically connected with described temperature-sensitive transmission cable L2 by a normally closed switch K2, described temperature-sensitive transmission cable L1 is electrically connected with the positive terminal of power supply by normal open switch K4, positive terminal resistance R 3, normal open switch K5 in parallel on the described positive terminal resistance R 3, described temperature-sensitive transmission cable L2 is provided with check point B.
In the present embodiment, be provided with the check point A on top resistance R 1, positive terminal resistance R 3, normally closed switch K1, normally closed switch K2, normal open switch K3, normal open switch K4, normal open switch K5, the temperature-sensitive transmission cable L1, the check point B on the temperature-sensitive transmission cable L2 in the top box.Be provided with terminal resistance R2 and diode D1 in the termination box.
Principle of work of the present utility model is as follows:
The circuit of the embodiment one that shows with Fig. 3 is an example.
1, do not need in most of times of self check at the utility model detector, K switch I, K2 are kept closed, and diode D1 is in cut-off state, and K switch 3, K4 keep off-state, the existence of diode D1 does not influence the current potential that A is ordered like this, and detector is in normal detected state.
2, when detector needs self check, start the self-checking unit on the surveying instrument (microcomputer head), make K switch 1, K2 become off-state on the one hand, make K switch 3, K4 become closure state on the other hand, at this moment, diode D1 conducting, temperature-sensitive transmission cable L1, L2 form a closed circuit by K switch 3, K4, diode D1, utilize 24 volts of direct supplys to heat to temperature-sensitive transmission cable L1, L2.
3, the mode to temperature-sensitive transmission cable L1, L2 heating can be a continuation mode, also can be intermittent mode, and promptly heating a little while stops heating a little while.
4, the gap that is stopping to heat, surveying instrument (microcomputer head) constantly detects the temperature variation that detector A is ordered, in case temperature value or rate of temperature change arrive the setting value of reporting to the police, the microcomputer head is reported a fire, and the end of control self check process, detector returns to normal testing state.
Two the heater circuit of the embodiment that Fig. 4 shows is similar to above-mentioned principle to principle of work, at this, is not described in detail.
The switch in the circuit of temperature-sensitive transmission cable heating in the utility model can be any type of switch; Diode D1 can be any electronic component with unidirectional on state characteristic, also can substitute with a normal open switch, and at this moment heater circuit need be adjusted accordingly, and can manage to make its closure during the self check heating; The type of heating of temperature-sensitive transmission cable L1, L2 can be by the automated manner of microcomputer head according to pre-set programs control, also can be field staff's manual manipulation mode;
Heating power supply can utilize Fig. 3,24 volts of direct supplys shown in Figure 4, also can be the power supply of other electric pressure of handling through conversion or current limliting; Normally closed switch K1 in the heater circuit can cancel, not the shadow heating function.
Heater wire in the utility model can be a temperature-sensitive transmission cable self, also can be the independently lead that increases in order to realize heating function, or the combining of separate conductors and temperature-sensitive transmission cable, and heater circuit will suitably be adjusted this moment.
The utility model also can be used for froth fire extinguishing system and gas extinguishing system except that being used for fire-sprinkling system.
Claims (2)
1, a kind of have from the analog linear cable formula detector that heats self-checking function, by the top box, termination box, temperature-sensitive transmission cable L1, temperature-sensitive transmission cable L2 constitutes, it is characterized in that: be provided with top resistance R 1 in the described top box, one end of this top resistance is electrically connected with described temperature-sensitive transmission cable L1, the other end is electrically connected with the ground gate terminal of power supply by a normally closed switch K1, described temperature-sensitive transmission cable L1 is electrically connected with the positive terminal of power supply by a normal open switch K4, described temperature-sensitive transmission cable L2 is electrically connected with the positive terminal of power supply by a normally closed switch K2, described temperature-sensitive transmission cable L2 is electrically connected with the ground gate terminal of power supply by a normal open switch K3, be parallel with temperature-sensing element R between described temperature-sensitive transmission cable L1 and the temperature-sensitive transmission cable L2, terminal resistance R2, diode D1, described terminal resistance R2 and diode D1 are installed in the described termination box, and described temperature-sensitive transmission cable L1 is provided with check point A.
2, according to claim 1 have from the analog linear cable formula detector that heats self-checking function, it is characterized in that: also be provided with positive terminal resistance R 3 in the described top box, one end of this resistance is electrically connected with the positive terminal of described power supply, the other end is electrically connected with described temperature-sensitive transmission cable L2 by a normally closed switch K2, described temperature-sensitive transmission cable L1 is electrically connected with the positive terminal of power supply by normal open switch K4, positive terminal resistance R 3, normal open switch K5 in parallel on the described positive terminal resistance R 3, described temperature-sensitive transmission cable L2 is provided with check point B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059716 CN2709960Y (en) | 2004-05-19 | 2004-05-19 | Analogue line measuring cable probe with automatic heating and detecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420059716 CN2709960Y (en) | 2004-05-19 | 2004-05-19 | Analogue line measuring cable probe with automatic heating and detecting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2709960Y true CN2709960Y (en) | 2005-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420059716 Expired - Lifetime CN2709960Y (en) | 2004-05-19 | 2004-05-19 | Analogue line measuring cable probe with automatic heating and detecting function |
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| Country | Link |
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| CN (1) | CN2709960Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656010B (en) * | 2007-07-23 | 2011-01-12 | 首安工业消防有限公司 | Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof |
| CN107941360A (en) * | 2017-12-18 | 2018-04-20 | 厦门微普电子科技有限公司 | A kind of temperature sensing cable assembly and circuit for detecting, method for detecting |
| CN109782127A (en) * | 2019-01-21 | 2019-05-21 | 杭州雷砺自动化科技有限公司 | A kind of parallel intelligent terminal module and cable continuity test method |
-
2004
- 2004-05-19 CN CN 200420059716 patent/CN2709960Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656010B (en) * | 2007-07-23 | 2011-01-12 | 首安工业消防有限公司 | Linear temperature sensing fire detector with electronic switch assembly and alarming method thereof |
| CN107941360A (en) * | 2017-12-18 | 2018-04-20 | 厦门微普电子科技有限公司 | A kind of temperature sensing cable assembly and circuit for detecting, method for detecting |
| CN107941360B (en) * | 2017-12-18 | 2023-12-15 | 中汽客汽车零部件（厦门）有限公司 | Temperature sensing cable assembly, detection circuit and detection method |
| CN109782127A (en) * | 2019-01-21 | 2019-05-21 | 杭州雷砺自动化科技有限公司 | A kind of parallel intelligent terminal module and cable continuity test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHOU AN INDUSTRY FIRE LTD. Free format text: FORMER NAME OR ADDRESS: SHAOAN INDUSTRY FIRE-FIGHTING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 101304 Beijing City, Shunyi District Banbidian Industrial Zone Li Qiao Zhen Nan Li Road No. 22 Patentee after: Sureland Industry Fire-Fighting Co., Ltd. Address before: 101304 Beijing City, Shunyi District Banbidian Industrial Zone Li Qiao Zhen Nan Li Road No. 22 Patentee before: Shouan Industrial Fire Control Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Analogue line measuring cable probe with automatic heating and detecting function Effective date of registration: 20121010 Granted publication date: 20050713 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140519 Granted publication date: 20050713 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171114 Granted publication date: 20050713 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |