CN110796820A - Temperature-sensing fire detector and fire monitoring method - Google Patents
Temperature-sensing fire detector and fire monitoring method Download PDFInfo
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- CN110796820A CN110796820A CN201911248461.XA CN201911248461A CN110796820A CN 110796820 A CN110796820 A CN 110796820A CN 201911248461 A CN201911248461 A CN 201911248461A CN 110796820 A CN110796820 A CN 110796820A
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Abstract
The application provides a temperature-sensing fire detector and a fire monitoring method, the temperature-sensing fire detector comprises a processing unit and a plurality of detection units, the detection units are used for contact temperature sensing and/or non-contact temperature sensing, the detection units directly connected with the processing unit are direct detection units, the detection units not directly connected with the processing unit are indirect detection units, the processing unit is connected with the plurality of direct detection units to form a star-shaped structure with the processing unit as the center, or the direct detection units and/or the indirect detection units are connected with the plurality of indirect detection units; each detection unit is provided with an independent number which can be identified by the processing unit; the processing unit is used for carrying out fire monitoring according to the signals transmitted by the detection unit and positioning the fire occurrence position according to the independent number. Therefore, the fire monitoring and alarming in a range can be effectively realized under the condition of saving the using amount of the detection unit as much as possible, the cost of engineering equipment can be reduced, and the position of a fire can be timely positioned.
Description
Technical Field
The application relates to the technical field of sensing, in particular to a temperature-sensing fire detector and a fire monitoring method.
Background
At present, cable type linear temperature-sensing fire detectors are widely applied at home and abroad for fire detection. The cable type linear temperature-sensing fire detector is characterized in that a temperature-sensing material is processed into a cable, a sheath is coated outside the cable, and the detection principle is generally an impedance change principle (namely the detector is made of a cable material with a special temperature coefficient, and a detection circuit judges whether a fire occurs on the spot according to the impedance change of the cable).
In the current engineering application, the cable type linear temperature-sensing fire detector is limited by the structure and the detection mechanism, the detection radius is limited, the detection range is limited, and a large number of cable type linear temperature-sensing fire detectors (the monitoring range of the cable type linear temperature-sensing fire detectors is near the arrangement position) are generally required to be arranged for carrying out fire monitoring and alarming on a large-range space, so that the cost of engineering equipment is increased, and the cost performance of engineering application is reduced. Moreover, the cable type linear temperature-sensing fire detector is difficult to effectively position the fire occurrence position and is not beneficial to timely carrying out fire emergency rescue.
Disclosure of Invention
An object of the embodiments of the present application is to provide a temperature-sensitive fire detector and a fire monitoring method, so as to monitor and alarm a fire in a large space as much as possible, and to locate a fire occurrence location in time.
In order to achieve the above object, embodiments of the present application are implemented as follows:
in a first aspect, an embodiment of the present application provides a temperature-sensitive fire detector, where the temperature-sensitive fire detector includes a processing unit and multiple detection units, where the detection units are configured to sense temperature in a contact manner and/or in a non-contact manner, the detection units directly connected to the processing unit are direct detection units, the detection units not directly connected to the processing unit are indirect detection units, the processing unit is connected to multiple direct detection units to form a star-shaped structure with the processing unit as a center, or the direct detection units and/or the indirect detection units are connected to multiple indirect detection units; each detection unit is provided with an independent number which can be identified by the processing unit; the processing unit is used for carrying out fire monitoring according to the signals transmitted by the detection unit and positioning the fire occurrence position according to the independent number of the detection unit.
A plurality of detection units of the temperature-sensitive fire detector can be connected with the processing unit, wherein the detection units directly connected with the processing unit are direct detection units, and the detection units not directly connected with the processing unit are indirect detection units. Can be according to actual need be connected a plurality of detection units with processing unit and form star type structure, tree structure etc. compare in the fire monitoring of cable type line type temperature-sensing fire detector to the scope of equidimension the same (cable type line type temperature-sensing fire detector can not set up branch structure, in the time of practical application, when every set of cable type line type detector lays, all can pass through the trunk portion, cause the waste), can effectively realize the fire monitoring and the warning of scope nature under the condition of sparingly detecting the unit quantity as far as possible, reduce engineering equipment cost, promote temperature-sensing fire detector's engineering application price/performance ratio. And, because every detecting element all has the distinguishable independent number of processing unit, processing unit alright through independent number, confirm the detecting element's of reporting to the police position, be favorable to in time fixing a position the position that the conflagration takes place.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the detection unit includes a temperature sensing cable and a temperature sensing element, where the temperature sensing element has the independent number and is used for contact temperature sensing and non-contact temperature sensing, and the temperature sensing cable is used for contact temperature sensing; one end of the temperature sensing cable is connected with the temperature sensing element; the other end of the temperature sensing cable is used for being connected with the processing unit or connected with a temperature sensing element of the other detection unit.
The detection unit comprises a temperature sensing cable and a temperature sensing element, the temperature sensing element can be used for contact temperature sensing and non-contact temperature sensing, and the temperature sensing cable can be used for being connected with the temperature sensing element of the processing unit or another detection unit, so that the expansion of the temperature sensing fire detector is realized, the distribution range of the temperature sensing fire detector can be changed according to actual needs, and the temperature sensing fire detector can adapt to various environments. In addition, the temperature sensing cable is used for contact temperature sensing, the temperature sensing element is used for contact temperature sensing and non-contact temperature sensing, the advantages of the contact temperature sensing and the non-contact temperature sensing can be integrated, the detection result of the detection unit is closer to the temperature condition in the actual environment, and the influence caused by the structure and the arrangement mode of the cable type linear temperature sensing fire detector can be avoided as much as possible (the cable type linear temperature sensing fire detector is easy to be subjected to electromagnetic interference).
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the temperature sensing cable is formed by stranding a plurality of cores.
The temperature sensing cable is cabled in a multi-core stranding mode, and a multi-core stranding structure can effectively inhibit common-mode interference, so that the anti-interference capability is strong, and the influence of electromagnetic interference on a detection result of the temperature sensing cable can be reduced as far as possible.
With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the temperature sensing cable and the temperature sensing element are connected by ultrasonic welding, infrared welding or laser welding.
The temperature sensing cable and the temperature sensing element are connected in an ultrasonic welding, infrared welding or laser welding mode, so that the waterproof and dustproof effects can be achieved, and the detection precision of the detection unit can be guaranteed as far as possible.
With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, a relay module is further connected between the temperature sensing cable and the temperature sensing element of the detection unit, and the relay module is configured to amplify and output a received signal.
The relay module is connected between the temperature sensing cable and the temperature sensing element of the detection unit to amplify the received signal, so that the accuracy of the detection result of the detection unit far away from the processing unit is guaranteed, and a basis for accurately monitoring a large-scale fire disaster for the temperature sensing fire disaster detector is provided.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the relay module includes a temperature sensing cable amplifying circuit and a temperature sensing element amplifying circuit, where the temperature sensing cable amplifying circuit is configured to amplify a signal of the temperature sensing cable; the temperature sensing element amplifying circuit is used for amplifying the signal of the temperature sensing element.
The relay module is provided with the temperature sensing cable amplifying circuit and the temperature sensing element amplifying circuit to amplify the signal of the temperature sensing cable and the signal of the temperature sensing element respectively, so that the accuracy of the detection result of the detection unit is guaranteed.
In a second aspect, an embodiment of the present application provides a fire monitoring method, which is applied to a processing unit in the temperature-sensitive fire detector described in any one of the first aspect or possible implementation manners of the first aspect, where the method includes: acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit; determining a difference value between the instant temperature data and the historical temperature data of the detection unit; and when the difference value is larger than a first preset value, determining the fire position according to the independent number and performing fire alarm.
And determining the difference between the instant temperature data and the historical temperature data, comparing the difference with a first preset value, and determining the position of the fire according to the independent number and performing fire alarm when the difference is greater than the first preset value. By the mode, when the temperature data change value detected by the detection unit exceeds the first preset value, the fire disaster at the position can be determined, so that the fire disaster can be accurately monitored, the position where the fire disaster happens can be timely positioned, and the fire disaster emergency rescue can be timely performed.
With reference to the second aspect, in a first possible implementation manner of the second aspect, when the difference is not greater than the first preset value, the method further includes: judging whether the difference value is larger than a second preset value or not, wherein the second preset value is smaller than the first preset value; if so, recording the detection unit corresponding to the independent number and giving an early warning; if not, updating the historical temperature data according to the instant temperature data.
When the difference value is between the first preset value and the second preset value, the position monitored by the detection unit is judged to possibly generate a fire, the detection unit is recorded and early-warning is carried out, the situation that the fire is not perceived due to the fact that the difference value between the instant temperature data and the historical temperature data detected by the early detection unit in the fire generation process cannot reach the first preset value can be avoided as far as possible, the situation that the fire is generated after the fire is delayed can be avoided as far as possible, and timely rescue of the fire is facilitated.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, when the difference is greater than a second preset value and is not greater than the first preset value, after recording the detection unit corresponding to the independent number and performing early warning, the method further includes: determining the number of early-warning detection units in the same time period; when the number is smaller than the preset number, determining the fire position according to the independent number and performing fire alarm; and when the number is not less than the preset number, determining the installation position of each early-warning detection unit, and updating the first preset value according to the installation position of each early-warning detection unit.
When the difference value is between the first preset value and the second preset value, the number of the early-warning detection units in the same time period is determined, if the number is smaller than the preset number, the situation that the local fire happens is likely to occur, and the temperature rise is not likely to be caused by the rise of the environmental temperature, so that the fire can be effectively and timely alarmed. When the number of the early-warning detection units is not less than the preset number, the detected temperature data of the detection units are probably caused by the rise of the ambient temperature, and false alarm can be avoided as far as possible.
In a third aspect, an embodiment of the present application provides a fire monitoring method, which is applied to a processing unit in the temperature-sensitive fire detector described in the first aspect or any one of possible implementation manners of the first aspect, where the method includes: acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit; comparing the instant temperature value in the instant temperature data with an alarm temperature value; and when the instant temperature value is greater than the alarm temperature value, determining the fire position according to the independent number and carrying out fire alarm.
And comparing the instant temperature value in the instant temperature data with the alarm temperature value, and determining the position of the fire according to the independent number and carrying out fire alarm when the instant temperature value is greater than the alarm temperature value. By the mode, when the temperature value detected by the detection unit exceeds the alarm temperature value, the fire disaster at the position can be determined, so that the fire disaster can be accurately monitored, the position of the fire disaster can be timely positioned, and the fire disaster emergency rescue can be timely performed.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a temperature-sensitive fire detector according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of another temperature-sensitive fire detector according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a detection unit according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of another detection unit provided in the embodiment of the present application.
Fig. 5 is a schematic structural diagram of a temperature sensing cable according to an embodiment of the present application.
Fig. 6 is a circuit diagram of a first part of a temperature sensing element amplifying circuit according to an embodiment of the present application.
Fig. 7 is a circuit diagram of a second part of an amplifying circuit of a temperature sensing element according to an embodiment of the present application.
Fig. 8 is a circuit diagram of a temperature sensing cable amplifying circuit according to an embodiment of the present application.
Fig. 9 is a flowchart of a fire monitoring method according to an embodiment of the present application.
Fig. 10 is a flowchart of another fire monitoring method according to an embodiment of the present disclosure.
Icon: 10-temperature-sensing fire detector; 11-a processing unit; 12-a detection unit; 121-a temperature-sensitive element; 1211-temperature sensing window; 122-temperature sensitive cable; 1221-temperature sensitive wire core; 1222-a sheath; 12A-a direct detection unit; 12B-indirect detection unit.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a temperature-sensitive fire detector 10 according to an embodiment of the present disclosure.
In the present embodiment, the temperature-sensitive fire detector 10 may include a processing unit 11 and a detection unit 12.
The processing unit 11 may be connected to a plurality of detecting units 12, and is configured to receive the temperature data detected by the detecting units 12 and process the temperature data.
Due to the complex and variable real environment, in order to realize fire monitoring in a large range with fewer temperature-sensitive fire detectors 10 as much as possible, the connection mode between the processing unit 11 and the plurality of detecting units 12 may be, for example: the plurality of probe units 12 are connected with each other around the processing unit 11, and form a star-shaped structure around the processing unit 11.
In the present embodiment, for the convenience of description, the detection unit 12 is distinguished here: the detection unit 12 directly connected to the processing unit 11 is regarded as a direct detection unit 12A, and the detection unit 12 not directly connected to the processing unit 11 is regarded as a indirect detection unit 12B. Note that the individual structures of the direct detection unit 12A and the indirect detection unit 12B are identical, and differ in the connection position, not two completely different detection units 12.
Thus, the processing unit 11 is connected to the plurality of detection units 12 in a star configuration, i.e. the processing unit 11 is connected to the plurality of direct detection units 12A. The star-shaped temperature-sensitive fire detector 10 may monitor a fire in a wider range than the cable-type line-type temperature-sensitive fire detector 10, rather than limiting the monitoring range to the vicinity of the installation path of the cable-type line-type temperature-sensitive fire detector 10 (e.g., 2 meters around the cable-type line-type temperature-sensitive fire detector 10).
Of course, the connection form between the processing unit 11 and the plurality of detecting units 12 in the temperature-sensitive fire detector 10 is not limited to the star configuration described above.
Referring to fig. 2, fig. 2 is a schematic structural diagram illustrating another temperature-sensitive fire detector 10 according to an embodiment of the present disclosure.
In order to more accurately monitor the fire in the environment within the range, the processing unit 11 and the plurality of detecting units 12 may be connected in a tree structure. Illustratively, a plurality of indirect detection units 12B may be connected to the direct detection unit 12A, so as to arrange the plurality of indirect detection units 12B in a range monitored by the direct detection unit 12A and the indirect detection unit 12B, thereby more accurately monitoring the fire in the environment in the range.
Of course, the indirect detection unit 12B may also be connected to a plurality of indirect detection units 12B, so as to arrange more indirect detection units 12B in the range monitored by the indirect detection unit 12B and the connected indirect detection units 12B, thereby performing more accurate fire monitoring on the environment in the range. Therefore, in practical applications, the layout can be performed after comprehensive consideration of factors such as actual needs and layout cost, and the like, and the present application should not be considered as limited herein.
In addition, it should be noted that, in the case where only one direct detection unit 12A is connected to the processing unit 11, and a plurality of indirect detection units 12B are connected to the direct detection unit 12A, or a plurality of indirect detection units 12B are connected to one indirect detection unit 12B of the temperature-sensitive fire detector 10, the present invention is also within the scope of the present application.
The temperature-sensitive fire detector 10 adopts such a structure, and can effectively realize the fire monitoring of the range property under the condition of saving the usage of the detection unit 12 as much as possible in comparison with the fire monitoring of the range of the same size by the cable type linear temperature-sensitive fire detector (the cable type linear temperature-sensitive fire detector needs to be provided with a multilayer annular structure, and refers to a plurality of concentric circles to realize effective fire monitoring to the area of the range), thereby reducing the cost of engineering equipment and improving the engineering application cost performance of the temperature-sensitive fire detector 10. In addition, structural adjustment can be carried out according to actual need, and detection unit 12 is laid in the scope to promote to carry out the fire monitoring that the precision is higher to the environment in the scope.
In the present embodiment, in order to realize the location of the fire occurrence position, each of the detection units 12 in the temperature-sensitive fire detector 10 is exemplified to have an independent number recognizable by the processing unit 11. The installation position of each detection unit 12 may be associated with the independent number of the corresponding detection unit 12, that is, the location of the installation position of the detection unit 12 (that is, the location of the fire occurrence position) may be realized by recognizing the independent number of the detection unit 12. Therefore, the fire disaster position can be accurately and quickly positioned, and the fire disaster rescue device is favorable for timely carrying out emergency rescue on the fire disaster.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a detection unit 12 according to an embodiment of the present disclosure. In the present embodiment, the detection unit 12 may include a temperature sensing element 121 and a temperature sensing cable 122.
The temperature sensing element 121 may have an independent number (i.e., an independent number provided in the detection unit 12 to be recognized by the processing unit 11) so as to locate the fire occurrence location by locating the installation location of the temperature sensing element 121. In the present embodiment, the temperature sensing element 121 can be used for both contact temperature sensing and non-contact temperature sensing, wherein the non-contact temperature sensing can be image temperature sensing (e.g. infrared image temperature sensing). Since the temperature sensing element 121 itself also has the function of contact temperature sensing, the contact temperature sensing can contact with the surface of the object to detect the temperature. The temperature sensing cable 122 has a contact temperature sensing function, so that the temperature sensing unit 12 can detect the temperature consistently. Therefore, the temperature sensing element 121 can also realize a temperature sensing function that is not different from the temperature sensing cable 122. That is, the temperature-sensitive cable 122 can realize contact temperature sensing (both contact temperature sensing) together with the temperature-sensitive element 121, and the temperature-sensitive cable 122 can realize non-contact temperature sensing together depending on the non-contact temperature-sensing function of the temperature-sensitive element 121. The temperature sensing element 121 may be provided with a temperature sensing window 1211, which facilitates non-contact temperature sensing of the temperature sensing element 121.
Referring to fig. 4, fig. 4 shows a schematic view of the connection between the circular temperature sensing cable 122 and the temperature sensing element 121, and fig. 3 shows the flat temperature sensing cable 122. The shape and the selected type of the temperature-sensitive cable 122 herein should not be construed as limiting the present application.
Referring to fig. 5, in the present embodiment, the temperature sensing cable 122 may include a temperature sensing wire core 1221 and a sheath 1222, and the sheath 1222 may cover the surface of the temperature sensing wire core 1221 to protect the temperature sensing wire core 1221. In order to reduce the electromagnetic interference to which the temperature-sensitive cable 122 is subjected as much as possible, the temperature-sensitive cable 122 may be cabled by a multi-core twisting method, for example, a two-core twisting method as shown in fig. 5A, or a four-core twisting method as shown in fig. 5B. The multi-core stranded structure can effectively suppress common mode interference, so that the anti-interference capability is strong, and the influence of electromagnetic interference on the detection result of the temperature sensing cable 122 can be reduced as much as possible. Of course, the two listed forms of multi-core stranded cabling should not be considered as limiting the present application.
One end of the temperature sensing cable 122 may be connected to the temperature sensing element 121, and the other end of the temperature sensing cable 122 may be connected to the processing unit 11, or may be connected to the temperature sensing element 121 of another detection unit 12.
For example, in the direct detection unit 12A, one end of the temperature sensing cable 122 is connected to the temperature sensing element 121 (forming the detection unit 12), and the other end of the temperature sensing cable 122 may be connected to the processing unit 11. In the indirect detection unit 12B, one end of the temperature sensing cable 122 is connected to the temperature sensing element 121 (forming the detection unit 12), and the other end is connected to the temperature sensing element 121 of the other detection unit 12.
In this way, the connection between the detection unit 12 and the processing unit 11 and the connection between the detection unit 12 and the detection unit 12 in the temperature-sensitive fire detector 10 can be realized, so that the structure of the temperature-sensitive fire detector 10 can be adjusted according to actual needs to adapt to the actual environment, and the temperature-sensitive fire detector 10 has more flexibility and applicability.
In the present embodiment, in order to ensure the detection accuracy of the detection unit 12, the temperature sensing cable 122 and the temperature sensing element 121 may be connected by ultrasonic welding, infrared welding or laser welding. By means of ultrasonic welding, infrared welding or laser welding, the welding position between the temperature sensing cable 122 and the temperature sensing element 121 can achieve waterproof and dustproof effects, and the accuracy of the detection unit 12 is further ensured. Of course, the connection between the temperature sensing cable 122 and the temperature sensing element 121 and the connection between the temperature sensing cable 122 and the processing unit 11 in the temperature sensing fire detector 10 according to the embodiment of the present invention may be made by such welding, which is not limited herein.
In addition, since the temperature sensing cable 122 belongs to a conductor and the temperature sensing cable 122 and the temperature sensing element 121 are minimally affected by a small current and a small voltage (0.5A or less and 36V or less), the temperature sensing cable 122 can be used as a communication and power supply multiplexing line, and thus the temperature sensing cable 122 and the temperature sensing element 121 do not need to be powered by an additional line, which can save cost and make the structures of the detection unit 12 and the temperature sensing fire detector 10 simpler.
Since the detecting unit 12 connected to one processing unit 11 is far away from the processing unit 11 (for example, 10 km or more), when the signal detected by the detecting unit 12 is transmitted to the processing unit 11, the signal may be weak, which is not favorable for the temperature-sensitive fire detector 10 to accurately monitor the environment for fire. Therefore, in order to ensure the monitoring accuracy of the temperature sensitive fire detector 10, a relay module may be connected between the temperature sensitive cable 122 and the temperature sensitive element 121 to amplify and output the received signal, so as to ensure the strength of the signal. For example, the relay module may be disposed between the temperature sensing cable 122 of one detection unit 12 and the temperature sensing element 121 of another detection unit 12, taking the detection unit 12 as a unit, so as to amplify the signal of the detection unit 12 and transmit the amplified signal to the other detection unit 12, and finally transmit the amplified signal to the processing unit 11.
In this embodiment, the relay module may include a temperature sensing cable 122 amplification circuit and a temperature sensing element 121 amplification circuit. The temperature sensing cable 122 amplifying circuit may be used to amplify a signal of the temperature sensing cable 122, and the temperature sensing element 121 amplifying circuit may be used to amplify a signal of the temperature sensing element 121. Thus, the intensity of the signal transmitted back to the processing unit 11 by the detection unit 12 can be ensured.
For example, referring to fig. 6 and 7, fig. 6 and 7 respectively show a first circuit diagram and a second circuit diagram of the amplifying circuit of the temperature sensing element 121 (which are shown in two parts because the drawings are too large to be viewed easily, wherein M and N in the part of fig. 6 are respectively connected with M and N in fig. 7, that is, the amplifying circuit of the temperature sensing element 121 is formed).
The specific circuit connection of the amplifying circuit of the temperature sensing element 121 provided in the embodiment of the present application can refer to the circuit connection shown in fig. 6 and fig. 7, which is not specifically described herein. Here, thermopile indicates a thermopile, voltage sources of 2.5V, 4.5V, 5V, and the like indicate 2.5 volts, 4.5 volts, and 5 volts, respectively, NTC OUT indicates an output of a thermistor (i.e., an output of ambient temperature sensing), IR OUT indicates an infrared output (i.e., an output of non-contact temperature sensing), R1 to R14 indicate resistors, and C2, C3, C4, C6, C7, C8, C9, C11, C13, and C14 indicate capacitors.
For example, referring to fig. 8, fig. 8 is a circuit diagram of an amplifying circuit of the temperature sensing cable 122. The specific circuit connection of the amplifying circuit of the temperature sensing cable 122 provided in the embodiment of the present application can refer to the circuit connection shown in fig. 8, which is not specifically described herein. Wherein OPA43 4317ID is an operational amplifier, VCC is a voltage source, the reference numbers formed by letters R and numbers represent resistors, the reference numbers formed by letters C and numbers represent capacitors, FB1 and FB2 represent inductors, and CT3 represents a patch capacitor.
It should be noted that, the circuit for implementing signal amplification has various designs and connection manners, and the specific connection manner of the amplifying circuit of the temperature sensing element 121 and the specific connection manner of the amplifying circuit of the temperature sensing cable 122 provided in the embodiment of the present application are only one of various manners, and should not be considered as limiting the present application.
Based on the same concept, the embodiment of the application also provides a fire monitoring method which is applied to the processing unit of the temperature-sensitive fire detector provided by the embodiment of the application. Referring to fig. 9, fig. 9 is a flowchart illustrating a fire monitoring method according to an embodiment of the present disclosure. In this embodiment, the fire monitoring method may include: step S10, step S20, and step S30.
In the present embodiment, the processing unit may execute step S10.
Step S10: and acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit.
In this embodiment, the processing unit may obtain the instant temperature data returned by the detection unit (i.e., the instant temperature data detected by the detection unit), and on the other hand, the processing unit may obtain the independent number of the detection unit. The instant temperature data and the independent numbering sequence are not limited.
After acquiring the instant temperature data returned by the detecting unit, the processing unit may execute step S20.
Step S20: and determining a difference value between the instant temperature data and the historical temperature data of the detection unit.
In this embodiment, historical temperature data for the detection unit may be determined. For example, the historical temperature data returned by the detection unit is determined by the independent number of the detection unit. In order to determine the temperature change of the environment in the range detected by the detection unit, a difference between the instant temperature data and the historical temperature data (difference is instant temperature data-historical temperature data) may be determined.
And the processing unit may perform step S30 after determining the difference.
Step S30: and when the difference value is larger than a first preset value, determining the fire position according to the independent number and performing fire alarm.
In this embodiment, the processing unit may compare the difference value with a first preset value. When the difference is larger than the first preset value, the temperature change is large, and a fire disaster is possibly caused. Therefore, the processing unit can determine the position where a fire disaster possibly occurs according to the installation position of the detection unit, so that the position where the fire disaster occurs can be positioned when the fire disaster occurs, and timely alarming and emergency rescue of the fire disaster are facilitated.
When the difference is not greater than the first preset value, the processing unit may determine whether the difference is greater than a second preset value, where the second preset value is less than the first preset value, in order to further eliminate the situation where a fire occurs (and to alert the fire as soon as possible before the fire is strong).
If so (namely the difference value is between the first preset value and the second preset value), the processing unit can record the detection units corresponding to the independent numbers and perform early warning. This allows the environment of the range detected by the detection units to be used as an object of doubt for further investigation.
When the difference value is between the first preset value and the second preset value, the position monitored by the detection unit is judged to possibly generate a fire, the detection unit is recorded and early-warning is carried out, the situation that the fire is not timely perceived due to the fact that the difference value between the instant temperature data and the historical temperature data detected by the early detection unit in the fire generation process cannot reach the first preset value can be avoided as far as possible, the situation that the fire is generated after the fire extends can be avoided as far as possible, and timely rescue and rescue of the fire are facilitated.
In this embodiment, the processing unit may further determine the number of the early-warning detection units in the same time period. For example, the processing unit may determine the number of the early-warning detection units (i.e. the recorded independent numbers of the detection units) in the time period (i.e. the same time period) after processing the instant temperature data returned by all the detection units. And when the number is less than the preset number, determining the fire position according to the independent number and performing fire alarm.
In this embodiment, when the number of the early-warning detection units is not less than the preset number, the processing unit may further determine the installation position of each early-warning detection unit, and analyze the positions to determine the amount to be adjusted, so as to update the first preset value.
For example, if the installation positions of the detection units are distributed, the temperature difference values of all the detection units (the difference value between the instant temperature data and the historical temperature data of the detection units in the same time period) may be obtained, and after the average value is obtained, the first preset value is adjusted according to a certain proportion of the average value (for example, the proportion may be 0.7, 0.6, 0.75, and the like, without limitation). If the installation positions of the detection units are concentrated, it is indicated that this situation belongs to the temperature variation of the local area, so that when the first preset value is adjusted, the first preset value can be adjusted according to a lower ratio (for example, the ratio may be 0.3, 0.2, 0.1, etc., and is not limited herein).
When the number of the early-warning detection units is not less than the preset number, the detected temperature data of the detection units are probably caused by the rise of the ambient temperature, and false alarm can be avoided as far as possible.
It should be noted that, in the distribution range of the temperature-sensitive fire detector, the overall environmental temperature change usually causes the instant temperature data of most of the detection units to change, and if the number of the detection units for early warning is smaller than the preset number, it indicates that the temperature change is the temperature change in a small range, and it is likely that the temperature change is caused by the fire in a local area, but not caused by the environmental temperature change. Therefore, the fire disaster monitoring is carried out on the environment within the range in such a way, and the fire disaster can be effectively and accurately monitored and alarmed in time.
And if the difference is smaller than the second preset value, the situation shows that no fire occurs in the range detected by the detection unit, and the historical temperature data of the detection unit can be updated according to the instant temperature data of the detection unit.
It should be noted that, in the case of an alarm, the historical temperature data of the detection unit may not be updated, and in the case of an early warning but no alarm, the historical temperature data may be updated, which is beneficial to preventing false alarm. The time interval for the processing unit to acquire the returned data may be once every 5 minutes, once every 3 minutes, etc., and is not limited herein.
In addition, the present embodiment uses the difference between the instantaneous temperature data and the historical temperature data as the criterion for judgment, but should not be construed as a limitation to the present application. In other optional implementation manners, the determination may be performed according to a temperature value in the instant temperature data returned by the detection unit, or may be performed in a manner of combining the temperature value and the difference value, which all should fall within the protection scope of the fire monitoring method provided in the embodiment of the present application.
Referring to fig. 10, fig. 10 is a flowchart illustrating another fire monitoring method according to an embodiment of the present disclosure. In this embodiment, the fire monitoring method may include: step S100, step S200, and step S300.
In the present embodiment, the processing unit may perform step S100.
Step S100: and acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit.
In this embodiment, the processing unit may obtain the instant temperature data returned by the detection unit (i.e., the instant temperature data detected by the detection unit), and on the other hand, the processing unit may obtain the independent number of the detection unit. The instant temperature data and the independent numbering sequence are not limited.
After acquiring the instant temperature data returned by the detecting unit, the processing unit may execute step S200.
Step S200: and comparing the instant temperature value in the instant temperature data with an alarm temperature value.
In this embodiment, the processing unit may compare the instant temperature value in the instant temperature data with the alarm temperature value.
Then, the processing unit may perform step S300.
Step S300: and when the instant temperature value is greater than the alarm temperature value, determining the fire position according to the independent number and carrying out fire alarm.
In this embodiment, when the processing unit determines that the instant temperature value is greater than the alarm temperature value, the processing unit may determine the location of the fire according to the independent number and perform a fire alarm. The specific fire location mode can refer to the above mode, and the alarm can be performed based on the determined fire occurrence position, which is not described herein again.
And comparing the instant temperature value in the instant temperature data with the alarm temperature value, and determining the position of the fire according to the independent number and carrying out fire alarm when the instant temperature value is greater than the alarm temperature value. By the mode, when the temperature value detected by the detection unit exceeds the alarm temperature value, the fire disaster at the position can be determined, so that the fire disaster can be accurately monitored, the position of the fire disaster can be timely positioned, and the fire disaster emergency rescue can be timely performed.
It should be noted that the two fire monitoring methods can be operated independently without affecting each other, or operated in combination, and are not limited herein.
In summary, the embodiments of the present application provide a temperature-sensitive fire detector and a fire monitoring method, where a plurality of detection units of the temperature-sensitive fire detector may be connected to a processing unit, where a detection unit directly connected to the processing unit is a direct detection unit, and a detection unit not directly connected to the processing unit is a non-direct detection unit. The multiple detection units and the processing unit can be connected to form a star-shaped structure, a tree-shaped structure and the like according to actual needs, so that the fire monitoring and alarming of the range can be effectively realized under the condition of saving the using amount of the detection units as far as possible, the cost of engineering equipment can be reduced, and the engineering application cost performance of the temperature-sensitive fire detector is improved. And, because every detecting element all has the distinguishable independent number of processing unit, processing unit alright through independent number, confirm the detecting element's of reporting to the police position, be favorable to in time fixing a position the position that the conflagration takes place.
In the embodiments provided in the present application, it should be understood that the disclosed method can be implemented in other ways. The above-described apparatus embodiments are merely illustrative.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A temperature-sensitive fire detector is characterized by comprising a processing unit and a plurality of detection units, wherein the detection units are used for contact temperature sensing and/or non-contact temperature sensing, the detection units directly connected with the processing unit are direct detection units, the detection units not directly connected with the processing unit are non-direct detection units,
the processing unit is connected with the plurality of direct detection units to form a star-shaped structure with the processing unit as the center, or the direct detection units and/or the indirect detection units are connected with the plurality of indirect detection units;
each detection unit is provided with an independent number which can be identified by the processing unit;
the processing unit is used for carrying out fire monitoring according to the signals transmitted by the detection unit and positioning the fire occurrence position according to the independent number of the detection unit.
2. The temperature-sensitive fire detector according to claim 1, wherein the detection unit includes a temperature-sensitive cable and a temperature-sensitive element, the temperature-sensitive element having the independent number for contact-type temperature sensing and non-contact-type temperature sensing, the temperature-sensitive cable for contact-type temperature sensing;
one end of the temperature sensing cable is connected with the temperature sensing element;
the other end of the temperature sensing cable is used for being connected with the processing unit or connected with a temperature sensing element of the other detection unit.
3. The temperature-sensitive fire detector of claim 2, wherein the temperature-sensitive cable is cabled by stranding a plurality of cores.
4. The temperature-sensitive fire detector according to claim 2, wherein the temperature-sensitive cable and the temperature-sensitive element are connected by ultrasonic welding, infrared welding or laser welding.
5. The temperature-sensitive fire detector according to claim 2, wherein a relay module is further connected between the temperature-sensitive cable and the temperature-sensitive element of the detection unit, and the relay module is configured to amplify and output the received signal.
6. The temperature-sensitive fire detector of claim 5, wherein the relay module includes a temperature-sensitive cable amplification circuit and a temperature-sensitive element amplification circuit,
the temperature sensing cable amplifying circuit is used for amplifying signals of the temperature sensing cable;
the temperature sensing element amplifying circuit is used for amplifying the signal of the temperature sensing element.
7. A fire monitoring method applied to a processing unit in the temperature-sensitive fire detector of any one of claims 1 to 6, the method comprising:
acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit;
determining a difference value between the instant temperature data and the historical temperature data of the detection unit;
and when the difference value is larger than a first preset value, determining the fire position according to the independent number and performing fire alarm.
8. A fire monitoring method according to claim 7, wherein when the difference is not greater than the first preset value, the method further comprises:
judging whether the difference value is larger than a second preset value or not, wherein the second preset value is smaller than the first preset value;
if so, recording the detection unit corresponding to the independent number and giving an early warning;
if not, updating the historical temperature data according to the instant temperature data.
9. A fire monitoring method according to claim 8, wherein when the difference is greater than a second preset value and not greater than the first preset value, after recording and warning the detection unit corresponding to the independent number, the method further comprises:
determining the number of early-warning detection units in the same time period;
when the number is smaller than the preset number, determining the fire position according to the independent number and performing fire alarm;
and when the number is not less than the preset number, determining the installation position of each early-warning detection unit, and updating the first preset value according to the installation position of each early-warning detection unit.
10. A fire monitoring method applied to a processing unit in the temperature-sensitive fire detector of any one of claims 1 to 6, the method comprising:
acquiring instant temperature data returned by the detection unit, and acquiring an independent number of the detection unit;
comparing the instant temperature value in the instant temperature data with an alarm temperature value;
and when the instant temperature value is greater than the alarm temperature value, determining the fire position according to the independent number and carrying out fire alarm.
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| CN201911248461.XA CN110796820A (en) | 2019-12-06 | 2019-12-06 | Temperature-sensing fire detector and fire monitoring method |
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| CN201911248461.XA CN110796820A (en) | 2019-12-06 | 2019-12-06 | Temperature-sensing fire detector and fire monitoring method |
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| CN111696303A (en) * | 2020-07-03 | 2020-09-22 | 青鸟消防股份有限公司 | Temperature sensing cable, temperature sensing fire detection system comprising same and temperature detection method |
| CN111879828A (en) * | 2020-07-27 | 2020-11-03 | 宁夏若伯新技术有限公司 | Safety automatic monitoring method for laboratory personnel and equipment |
| CN112763814A (en) * | 2020-11-25 | 2021-05-07 | 国网宁夏电力有限公司检修公司 | Novel special fire control sensor of electric power |
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| CN113643504A (en) * | 2021-07-29 | 2021-11-12 | 宜宾市消防救援支队 | Fire detection system and method based on multi-detection-unit linkage |
| CN114120565A (en) * | 2021-11-26 | 2022-03-01 | 燕山大学 | Forest fire early warning method |
| CN118089839A (en) * | 2024-02-26 | 2024-05-28 | 上海辉控电子科技有限公司 | Environment sensing cable and environment monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111696303A (en) * | 2020-07-03 | 2020-09-22 | 青鸟消防股份有限公司 | Temperature sensing cable, temperature sensing fire detection system comprising same and temperature detection method |
| CN111696303B (en) * | 2020-07-03 | 2024-02-06 | 青鸟消防股份有限公司 | Temperature sensing cable, temperature sensing fire detection system comprising same and temperature detection method |
| CN111879828A (en) * | 2020-07-27 | 2020-11-03 | 宁夏若伯新技术有限公司 | Safety automatic monitoring method for laboratory personnel and equipment |
| CN112763814A (en) * | 2020-11-25 | 2021-05-07 | 国网宁夏电力有限公司检修公司 | Novel special fire control sensor of electric power |
| CN113350720A (en) * | 2021-07-06 | 2021-09-07 | 扬州市兴隆塑料有限公司 | Stable PE electric power pipe of preventing distortion of plug wire |
| CN113643504A (en) * | 2021-07-29 | 2021-11-12 | 宜宾市消防救援支队 | Fire detection system and method based on multi-detection-unit linkage |
| CN114120565A (en) * | 2021-11-26 | 2022-03-01 | 燕山大学 | Forest fire early warning method |
| CN114120565B (en) * | 2021-11-26 | 2023-01-24 | 燕山大学 | Forest fire early warning method |
| CN118089839A (en) * | 2024-02-26 | 2024-05-28 | 上海辉控电子科技有限公司 | Environment sensing cable and environment monitoring system |
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