CN112447017B - Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking - Google Patents
Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking Download PDFInfo
- Publication number
- CN112447017B CN112447017B CN201910793816.7A CN201910793816A CN112447017B CN 112447017 B CN112447017 B CN 112447017B CN 201910793816 A CN201910793816 A CN 201910793816A CN 112447017 B CN112447017 B CN 112447017B
- Authority
- CN
- China
- Prior art keywords
- signal processing
- processing device
- input unit
- circuit
- sensing cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
Abstract
According to the cable type linear heat fire detector for alarming fire during disconnection, provided by the invention, the main monitoring input unit A and the standby monitoring input unit B which are connected to the two ends of the heat sensing cable are arranged in the same signal processing device on site or in different signal processing devices on site, so that the cost of manual maintenance time on the detector site is greatly saved, meanwhile, once the wire breakage fault occurs at any point of the heat sensing cable, the two ends of the heat sensing cable are adopted for detecting fire at the same time, the whole fire detection of the heat sensing cable in the original area protected by the detector can be ensured, and the reliability of fire alarm of the detector is greatly improved.
Description
Technical Field
The invention belongs to the technical field of fire protection, relates to a cable type linear temperature-sensing fire detector, and particularly relates to a cable type linear temperature-sensing fire detector for alarming fire during circuit breaking.
Background
The cable type linear temperature-sensing fire detector generally comprises a linear sensitive element, a signal processing device connected with one end of the linear sensitive element and a relay component which is connected with the other end of the linear sensitive element and only comprises a terminal resistor, wherein the linear sensitive element is generally also called a temperature-sensing cable or a detection cable and is divided into two main types of restorable type and non-restorable type.
As shown in fig. 1, the temperature sensing cable 3 of the conventional recoverable and non-recoverable cable type line type temperature sensing fire detector mainly comprises two or more detecting conductors and a heat sensing insulating material layer extruded outside each detecting conductor, and then twisted together. The signal processing device 1 is composed of a microprocessor 11, a monitoring input unit 12 and an output unit 13. The relay unit 2 is composed of a termination resistor R1.
The working principle is as follows: the monitoring input unit 12 of the signal processing device 1 forms a detection loop together with the temperature sensing cable 3 and the terminal resistor R1 of the relay component 2, and the monitoring input unit 12 detects the detection loop constantly. When the detector operates normally, the signal R Measuring detected by the monitoring input unit 12 is R Normal state , namely the parallel value of the resistance R Cable with improved cable characteristics of the temperature sensing cable 3 and the terminal resistor R1; as shown in fig. 2, when the temperature sensing cable 3 is disconnected once, as shown in fig. 3, a in fig. 3 is a disconnection point, a signal R Measuring detected by the monitoring input unit 12 is a resistance value R cable break of the temperature sensing cable 3 segment between the disconnection point and the signal processing device 1, and at this time, R Measuring >R Normal state , the microprocessor 11 in the signal processing device 1 compares and judges the detected signals, and the output unit 13 outputs a fault signal; meanwhile, when any part of the temperature sensing cable 3 is heated (i.e. when a fire disaster occurs), the signal R Measuring detected by the monitoring input unit 12 is a parallel value of the resistance value R Cable heat and the terminal resistor R1 after the temperature sensing cable 3 is heated, and if the detection signal R Measuring <R Fire alarm (R Fire alarm is a fire alarm threshold value), the microprocessor 11 in the signal processing device 1 compares and judges the detection signals, and the output unit 13 outputs a fire alarm signal.
The temperature sensing cable 3 is generally longer in length, the actual use length is 200 meters, the mounting positions of the signal processing device 1 and the relay component 2 are far away, the debugging and maintenance are inconvenient, if the situation that the relay component 2 cannot be found frequently occurs in a complex environment using place, meanwhile, in the running process of the detector, when the detection conductor is broken at any position of the temperature sensing cable 3, the signal processing device 1 can report faults, if the fault cannot be timely maintained, the detector cannot continuously monitor all fire conditions in a protected area in real time, and the safe running of equipment in the protected area is seriously affected.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a cable type linear heat fire detector which can detect the fire of the whole temperature sensing cable of the original area to be protected when any point of the temperature sensing cable is broken.
In order to achieve the above purpose, the cable type linear heat fire detector for alarming fire when in disconnection provided by the invention comprises a heat sensing cable and signal processing devices connected with two ends of the heat sensing cable; the signal processing device mainly comprises a microprocessor, a main monitoring input unit A, an output unit and a standby monitoring input unit B, wherein one end of the temperature sensing cable is connected with the main monitoring input unit A of the signal processing device, and the other end of the temperature sensing cable is connected with the standby monitoring input unit B of the signal processing device; wherein:
The main monitoring input unit A: the temperature sensing cable is mainly composed of a detection circuit for monitoring the temperature sensing cable, and signals detected by the detection circuit are input to a microprocessor;
The standby monitoring input unit B: the temperature sensing circuit mainly comprises a terminal resistance circuit, a detection circuit and a control circuit which is mutually switched between the terminal resistance circuit and the detection circuit, wherein when the microprocessor judges that the temperature sensing cable is broken, the control circuit switches the terminal resistance circuit into the detection circuit and inputs a signal detected by the detection circuit into the microprocessor;
the output unit: for controlling the microprocessor to output a fire or fault signal;
The microprocessor: the monitoring detection signal processing judgment for the main monitoring input unit A and the detection signal processing judgment for the standby monitoring input unit B and the control circuit control thereof, and control the output unit to output.
The standby monitoring input unit B further comprises a temperature sensing cable disconnection monitoring circuit, the temperature sensing cable disconnection monitoring circuit monitors voltages at two ends of a terminal resistor in the terminal resistor circuit, and the microprocessor processes and judges according to the monitored voltages and controls the control circuit.
The temperature sensing cable is mainly composed of at least two detection conductors and the same or different heat-sensitive insulating material layers extruded outside the detection conductors, and the detection conductors and the heat-sensitive insulating material layers are twisted together.
The heat-sensitive insulating material is a negative temperature coefficient heat-sensitive insulating material or a fusible heat-sensitive insulating material.
In order to achieve the above purpose, the invention provides another cable type linear heat fire detector for alarming fire when breaking circuit simultaneously, which comprises a main signal processing device, a secondary signal processing device and the heat sensing cable connected between the main signal processing device and the secondary signal processing device; the main signal processing device mainly comprises a microprocessor, a main monitoring input unit A and an output unit, and the auxiliary signal processing device mainly comprises a microprocessor, a standby monitoring input unit B and an output unit; one end of the temperature sensing cable is connected with a main monitoring input unit A of the main signal processing device, and the other end of the temperature sensing cable is connected with a standby monitoring input unit B of the auxiliary signal processing device; wherein:
a main monitoring input unit A of the main signal processing device: the temperature sensing cable is mainly composed of a detection circuit for monitoring the temperature sensing cable, and signals detected by the detection circuit are input to a microprocessor;
An output unit of the main signal processing apparatus: the microprocessor is used for controlling and outputting a fire alarm or fault signal by the main signal processing device;
A microprocessor of the main signal processing device: the detection signal processing judgment and output unit control is used for the main monitoring input unit B;
The standby monitoring input unit B of the auxiliary signal processing device: the temperature sensing cable circuit is mainly composed of a terminal resistance circuit, a detection circuit, a control circuit and a temperature sensing cable circuit breaking monitoring circuit, wherein the control circuit is used for switching the terminal resistance circuit into the detection circuit and inputting signals detected by the detection circuit into the microprocessor when the microprocessor judges that the temperature sensing cable is broken;
An output unit of the secondary signal processing device: the microprocessor of the auxiliary signal processing device is mainly used for controlling and outputting a fire alarm or fault signal;
The microprocessor of the secondary signal processing device: the detection signal used for the standby monitoring input unit B, the temperature sensing cable disconnection monitoring circuit monitoring signal processing judgment and the control circuit control, and the output unit is controlled to output.
The cable type linear temperature-sensing fire detector further comprises an adjacent temperature-sensing cable connected with the main signal processing device, and the main signal processing device further comprises a standby monitoring input unit B, wherein one end of the adjacent temperature-sensing cable is connected with the standby monitoring input unit B of the main signal processing device;
wherein:
the standby monitoring input unit B of the main signal processing device comprises a standby monitoring input unit B: the circuit mainly comprises a terminal resistance circuit, a detection circuit, a control circuit for mutually switching the terminal resistance circuit and the detection circuit, and an adjacent temperature sensing cable disconnection monitoring circuit, wherein when the microprocessor judges that the adjacent temperature sensing cable is disconnected, the control circuit switches the terminal resistance circuit into the detection circuit and inputs a signal detected by the detection circuit into the microprocessor;
A microprocessor of the main signal processing device: the detection signal of the standby monitoring input unit B of the main signal processing device, the monitoring signal processing judgment of the adjacent temperature sensing cable disconnection monitoring circuit and the control circuit are also used for controlling and controlling the output unit to correspondingly output.
The cable type linear temperature-sensing fire detector further comprises an adjacent temperature-sensing cable connected with the auxiliary signal processing device, wherein the auxiliary signal processing device further comprises a main monitoring input unit A, and one end of the adjacent temperature-sensing cable is connected with the main monitoring input unit A of the auxiliary signal processing device;
wherein:
the main monitoring input unit A of the auxiliary signal processing device: the temperature sensing device mainly comprises a detection circuit for detecting adjacent temperature sensing cables, and signals detected by the detection circuit are input to a microprocessor;
The microprocessor of the secondary signal processing device: and the detection signal processing judgment unit is also used for detecting the detection signal processing judgment of the main monitoring input unit A of the auxiliary signal processing device and controlling the output unit to correspondingly output.
The temperature sensing cable disconnection monitoring circuit monitors voltages at two ends of a terminal resistor in the terminal resistor circuit.
The temperature sensing cable further comprises a control wire core which sends an electric signal to the secondary signal processing device when the main signal processing device detects that the temperature sensing cable is broken.
The temperature sensing cable is mainly composed of at least two detection conductors and the same or different heat-sensitive insulating material layers extruded outside the detection conductors, and the detection conductors and the heat-sensitive insulating material layers are twisted together.
The heat-sensitive insulating material is a negative temperature coefficient heat-sensitive insulating material or a fusible heat-sensitive insulating material.
According to the cable type linear heat fire detector for alarming fire during disconnection, provided by the invention, the main monitoring input unit A and the standby monitoring input unit B which are connected to the two ends of the heat sensing cable are arranged in the same signal processing device on site or in different signal processing devices on site, so that the cost of manual maintenance time on the detector site is greatly saved, meanwhile, once the wire breakage fault occurs at any point of the heat sensing cable, the two ends of the heat sensing cable are adopted for detecting fire simultaneously, the whole fire detection of the heat sensing cable in the original area protected by the detector can be ensured, and the reliability of fire alarm of the detector is greatly improved.
Drawings
Fig. 1 is a schematic diagram of a conventional cable-type linear heat fire detector.
Fig. 2 is an equivalent schematic diagram of the cable type line-type heat fire detector shown in fig. 1.
Fig. 3 is an equivalent schematic diagram of a broken temperature sensing cable in the cable type heat fire detector shown in fig. 1.
Fig. 4 is a schematic structural diagram of a cable-type linear temperature-sensing fire detector for alarming fire during open circuit according to the first embodiment.
Fig. 5 is a schematic structural diagram of a cable-type linear heat fire detector for detecting a fire alarm during a disconnection according to the second embodiment.
Fig. 6 is a schematic structural diagram of a cable-type linear heat fire detector for detecting a fire alarm at the time of breaking according to the second embodiment.
FIG. 7 is a schematic diagram of a series of end-to-end connection of the improved cable-type linear heat fire detector base of FIG. 5.
Detailed Description
The cable type linear temperature-sensing fire detector for alarming fire when in disconnection provided by the invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 4, the cable type heat fire detector for detecting fire alarm during open circuit provided in this embodiment includes a signal processing device 1 and a heat sensing cable 3, wherein the signal processing device 1 mainly comprises a microprocessor 11, a main monitoring input unit a 12, an output unit 13, and a standby monitoring input unit B14, one end of the heat sensing cable 3 is connected to the main monitoring input unit a 12 of the signal processing device 1, and the other end is connected to the standby monitoring input unit B14 of the signal processing device 1; the main monitoring input unit A12 mainly comprises a detection circuit for detecting the temperature sensing cable 3, signals detected by the detection circuit are input to the microprocessor 11, and the standby monitoring input unit B14 mainly comprises a terminal resistance circuit, a detection circuit and a control circuit for mutually switching the terminal resistance circuit and the detection circuit and a temperature sensing cable open circuit monitoring circuit; when the microprocessor 11 judges that the temperature sensing cable 3 is broken, the control circuit switches the connection between the standby monitoring input unit B14 and the temperature sensing cable from the terminal resistance circuit to a detection circuit access state, and inputs a signal detected by the detection circuit to the microprocessor 11; the output unit 13 is used for controlling the microprocessor 11 to output a fire alarm or fault signal; the microprocessor 11 is used for processing and judging the detection signal of the main monitoring input unit a 12, and the detection signal of the standby monitoring input unit B14, monitoring and judging the signal processing of the broken temperature sensing cable monitoring circuit and controlling the output of the output unit 13 (if the broken temperature sensing cable is judged only by the detection signal of the main monitoring input unit a 12, the broken temperature sensing cable monitoring circuit in the standby monitoring input unit B14 can be eliminated, and of course, both the broken temperature sensing cable monitoring judgment can exist for the detector to work more reliably).
1) When the detector works normally, the standby monitoring input unit B14 of the signal processing device 1 is connected with the temperature sensing cable in a circuit access state of the terminal resistor R1, the main monitoring input unit A12 detects the resistance value of the detection loop formed by the temperature sensing cable 3 and the standby monitoring input unit B14 in real time, the microprocessor 11 judges and compares the resistance value according to the signals input by the main monitoring input unit A12, and when the detected resistance value is equal to a normal value R Normal state , the microprocessor 11 judges the state to be in a normal state.
2) When any one of the conductors of the temperature sensing cable 3 is broken, the main monitoring input unit A12 of the signal processing device 1 detects that the resistance value of the detection loop is larger than R Normal state , the microprocessor 11 judges that the circuit is broken, and the output unit 13 outputs a fault signal; meanwhile, the connection between the standby monitoring input unit B14 and the temperature sensing cable is switched into a detection circuit access state by a terminal resistor R1 circuit, and the detection circuit is used for detecting the resistance value of the temperature sensing cable section between the disconnection point and the standby monitoring input unit B14 and connected with the disconnection point; the main monitoring input unit A12 continues to detect the resistance value of the temperature sensing cable section between the disconnection point and the main monitoring input unit A12 and connected with the disconnection point; therefore, the signal processing device 1 still performs full-line detection and alarm on the temperature sensing cable 3 with the disconnection point through the main monitoring input unit a 12 and the standby monitoring input unit B14 from time to time, and the microprocessor 11 performs fire judgment according to the detection signals of the main monitoring input unit a 12 and the standby monitoring input unit B14.
Meanwhile, if a fire disaster occurs in the area protected by the temperature sensing cable section between the disconnection point and the standby monitoring input unit B14, the resistance of the temperature sensing cable section is reduced when the temperature sensing cable section is heated, and when the standby monitoring input unit B14 detects that the resistance is lower than the fire alarm threshold R Fire alarm B during disconnection, the microprocessor 11 judges that the fire alarm occurs, and the output unit 13 outputs a fire alarm signal; if a fire disaster occurs in the area protected by the temperature sensing cable section between the disconnection point and the main monitoring input unit A12, the resistance of the temperature sensing cable section is reduced when the temperature sensing cable section is heated, and when the main monitoring input unit A12 detects that the resistance is lower than the fire alarm threshold R Fire alarm A during disconnection, the microprocessor 11 judges that the fire alarm occurs, and the output unit 13 outputs a fire alarm signal.
Example two
As shown in fig. 5, the cable type linear heat fire detector for detecting fire alarm at the time of disconnection provided by the embodiment comprises a main signal processing device 1, a secondary signal processing device 4 and a heat sensing cable 3 connected between the main signal processing device and the secondary signal processing device; the main signal processing device 1 mainly comprises a microprocessor 11, a main monitoring input unit A12 and an output unit 13, the auxiliary signal processing device 4 mainly comprises a microprocessor 41, an output unit 43 and a standby monitoring input unit B44, one end of the temperature sensing cable 3 is connected with the main monitoring input unit A12 of the main signal processing device 1, and the other end is connected with the standby monitoring input unit B44 of the auxiliary signal processing device 4.
The main monitoring input unit a12 of the main signal processing apparatus 1 is mainly composed of a detection circuit that detects the temperature sensing cable 3, and inputs a signal detected by the detection circuit to the microprocessor 11; the output unit 13 of the main signal processing device is used for controlling and outputting a fire alarm or fault signal by the microprocessor 11 of the main signal processing device; the microprocessor 11 of the main signal processing device is used for the main monitoring input unit a12 to detect the signal processing determination and the output unit 13 to control.
The standby monitoring input unit B44 of the auxiliary signal processing device 4 mainly comprises a terminal resistance circuit, a detection circuit and a control circuit for mutually switching between the terminal resistance circuit and the detection circuit, and a temperature sensing cable disconnection monitoring circuit, when the microprocessor 41 judges that the temperature sensing cable is disconnected, the control circuit switches the connection between the standby monitoring input unit B44 and the temperature sensing cable from the terminal resistance to a detection circuit connection state, and signals detected by the detection circuit are input to the microprocessor 41; the output unit 43 of the secondary signal processing device is mainly controlled by the microprocessor 41 of the secondary signal processing device to output a fire alarm or fault signal; the microprocessor 41 of the secondary signal processing device 4 is used for detecting signals of the standby monitoring input unit B44, monitoring signal processing judgment of the temperature sensing cable break monitoring circuit and controlling the control circuit to control the output unit 43 to output.
1) When the detector works normally, the connection between the standby monitoring input unit B44 of the auxiliary signal processing device 4 and the temperature sensing cable is in a circuit access state of the terminal resistor R1, the main monitoring input unit A12 of the main signal processing device 1 detects the resistance value of a detection loop formed by the temperature sensing cable 3 and the standby monitoring input unit B44 of the signal processing device 4 in real time, and when the detection resistance value is equal to a normal value R Normal state , the microprocessor 11 judges that the temperature sensing cable 3 is in a normal state; meanwhile, when the temperature sensing circuit disconnection monitoring circuit in the standby monitoring input unit B44 of the secondary signal processing device 4 monitors the voltage V Normal state at two ends of the terminal resistor R1, the microprocessor 41 judges that the temperature sensing cable 3 is normal. Thus, the detector is in a normal state.
2) When any one of the conductors of the temperature sensing cable 3 is broken, the main monitoring input unit A12 of the main signal processing device 1 detects that the resistance value of the detection loop is larger than R Normal state , the microprocessor 11 judges that the circuit is broken, and the output unit 13 outputs a fault signal; meanwhile, when the temperature sensing circuit disconnection monitoring circuit in the standby monitoring input unit B44 of the auxiliary signal processing device 4 cannot monitor the voltages at two ends of the terminal resistor R1, the connection between the standby monitoring input unit B44 and the temperature sensing cable is switched into a detection circuit connection state; in this way, the main monitoring input unit a 12 of the main signal processing apparatus 1 detects the resistance value of the temperature sensing cable section between the disconnection point and the main monitoring input unit a 12 and connected thereto, while the standby monitoring input unit B44 of the signal processing apparatus 4 detects the resistance value of the temperature sensing cable section between the disconnection point and the standby monitoring input unit B44 and connected thereto. Therefore, the temperature sensing cable 3 with the disconnection point is still monitored and reported to the fire in full line from time to time through the main monitoring input unit a 12 in the main signal processing device 1 and the standby monitoring input unit B44 in the auxiliary signal processing device 4.
Meanwhile, if a fire disaster occurs in the area protected by the temperature sensing cable section between the disconnection point and the standby monitoring input unit B44 in the secondary signal processing device 4, the resistance value of the temperature sensing cable section is reduced when the temperature sensing cable section is heated, and when the standby monitoring input unit B44 detects that the resistance value is lower than the fire alarm threshold R Fire alarm B during disconnection, the microprocessor 41 determines that the fire alarm is generated, and the output unit 43 outputs a fire alarm signal; if a fire disaster occurs in the area protected by the temperature sensing cable section between the disconnection point and the main monitoring input unit a 12 in the main signal processing device 1, the resistance value of the temperature sensing cable section is reduced when the temperature sensing cable section is heated, and when the main monitoring input unit a 12 in the main signal processing device 1 detects that the resistance value is lower than the fire alarm threshold R Fire alarm A when the disconnection occurs, the microprocessor 11 in the main signal processing device 1 determines that a fire alarm is generated, and the output unit 13 in the signal processing device 1 outputs a fire alarm signal.
As shown in fig. 6, in order to ensure that the connection between the standby monitoring input unit B44 of the secondary signal processing apparatus 4 and the temperature sensing cable can be switched to the monitoring circuit more reliably when any point of the temperature sensing cable 3 is broken, a control wire core 31 is added between the main monitoring input unit a 12 and the standby monitoring input unit B44 of the secondary signal processing apparatus 4 along the temperature sensing circuit 3 in the main signal processing apparatus 1. In normal operation, the main signal processing device 1 is a main monitoring device, the microprocessor 11 sends a normal signal to the main monitoring input unit a 12, the main monitoring input unit a 12 sends a high-level signal to the standby monitoring input unit B44 in the signal processing device 4 through the control wire core 31, the standby monitoring input unit B44 transmits the high-level signal to the microprocessor 41, and the microprocessor 41 controls the connection between the standby monitoring input unit B44 and the temperature sensing cable to be in a circuit access state of the terminal resistor R1. Conversely, when any one of the conductors of the temperature sensing cable 3 is broken, the microprocessor 11 in the main signal processing device 1 sends a broken signal to the main monitoring input unit a 12 thereof, the main monitoring input unit a 12 sends a low-level signal (i.e. a transition electric signal from a high level to a low level or vice versa) to the standby monitoring input unit B44 in the signal processing device 4 through the control wire core 31, and the connection between the standby monitoring input unit B44 in the auxiliary signal processing device 4 and the temperature sensing cable is switched to a monitoring circuit (a control wire core 31 may not be additionally arranged between the main monitoring input unit a 12 and the standby monitoring input unit B44 in the main signal processing device 1 along the temperature sensing circuit 3, and the electric signals are transmitted therebetween by a wireless signal transmission mode).
As shown in fig. 7, a schematic diagram of a usage mode of a cable type linear heat fire detector for alarming fire during disconnection as shown in fig. 5 is shown, which is connected end to end, and is different from fig. 5 in that: a main monitoring input unit and a standby monitoring input unit are arranged in the main and auxiliary signal processing devices connected with the head and the tail ends of each section of temperature sensing cable.
The temperature sensing cable is mainly composed of two or more detection conductors and the same or different heat sensing insulating material layers extruded outside the detection conductors, and the detection conductors and the heat sensing insulating material layers are twisted together.
The thermosensitive insulating material is a negative temperature coefficient thermosensitive insulating material or a fusible thermosensitive insulating material.
The main key point of the invention is that the main monitoring input unit and the standby monitoring input unit are arranged at two ends of the temperature sensing cable, once the temperature sensing cable is broken at one position, the connection between the standby monitoring input unit and the temperature sensing circuit is switched into the monitoring circuit by the terminal resistance circuit, so that the temperature sensing cable is monitored and reported from two ends of the temperature sensing cable. When the temperature sensing circuit is broken, the temperature sensing cable broken circuit monitoring circuit can be arranged in the standby monitoring input unit, and can also be arranged in the main monitoring input unit, and the standby monitoring input unit connected with the same temperature sensing cable is arranged in the same signal processing device or in two different signal processing devices, and the broken signal is transmitted wirelessly or in a wired way, so long as the connection between the standby monitoring input unit and the temperature sensing cable is switched into the detection circuit access state. The claims describe the scope of the invention, but everything includes the gist of the invention without departing from the gist of the invention, and any variant falls within the scope of the invention.
Claims (11)
1. A cable type linear temperature-sensing fire detector for alarming fire when breaking circuit is characterized by comprising a temperature-sensing cable and signal processing devices connected with two ends of the temperature-sensing cable; the signal processing device mainly comprises a microprocessor, a main monitoring input unit A, an output unit and a standby monitoring input unit B, wherein one end of the temperature sensing cable is connected with the main monitoring input unit A of the signal processing device, and the other end of the temperature sensing cable is connected with the standby monitoring input unit B of the signal processing device; wherein:
The main monitoring input unit A: the temperature sensing cable is mainly composed of a detection circuit for detecting the temperature sensing cable, and signals detected by the detection circuit are input to a microprocessor;
The standby monitoring input unit B: the temperature sensing circuit mainly comprises a terminal resistance circuit, a detection circuit and a control circuit which is mutually switched between the terminal resistance circuit and the detection circuit, wherein when the microprocessor judges that the temperature sensing cable is broken, the control circuit switches the terminal resistance circuit into the detection circuit and inputs a signal detected by the detection circuit into the microprocessor;
the output unit: for controlling the microprocessor to output a fire or fault signal;
the microprocessor: the detection signal processing judgment for the main monitoring input unit A and the detection signal processing judgment for the standby monitoring input unit B and the control circuit control thereof, and control the output unit to output.
2. The cable type linear temperature-sensing fire detector according to claim 1, wherein the standby monitoring input unit B further comprises a temperature-sensing cable break monitoring circuit, the temperature-sensing cable break monitoring circuit monitors voltages at two ends of a termination resistor in the termination resistor circuit, and the microprocessor processes and determines and controls the microprocessor according to the monitored voltages.
3. A cable type line type heat fire detector according to claim 1 or 2, wherein the heat sensing cable is mainly composed of at least two detecting conductors and a same or different heat sensitive insulating material layer extruded outside each of the detecting conductors, and twisted together.
4. A cable type line type heat fire detector according to claim 3, wherein the heat sensitive insulating material is a negative temperature coefficient heat sensitive insulating material or a fusible heat sensitive insulating material.
5. A cable type linear temperature-sensing fire detector for alarming fire when breaking circuit is characterized by comprising a main signal processing device, a secondary signal processing device and a temperature-sensing cable connected between the main signal processing device and the secondary signal processing device; the main signal processing device mainly comprises a microprocessor, a main monitoring input unit A and an output unit, and the auxiliary signal processing device mainly comprises a microprocessor, a standby monitoring input unit B and an output unit; one end of the temperature sensing cable is connected with a main monitoring input unit A of the main signal processing device, and the other end of the temperature sensing cable is connected with a standby monitoring input unit B of the auxiliary signal processing device; wherein:
A main monitoring input unit A of the main signal processing device: the temperature sensing cable is mainly composed of a detection circuit for detecting the temperature sensing cable, and signals detected by the detection circuit are input to a microprocessor;
An output unit of the main signal processing apparatus: the microprocessor is used for controlling and outputting a fire alarm or fault signal by the main signal processing device;
a microprocessor of the main signal processing device: the detection signal processing judgment and output unit control unit is used for the main monitoring input unit A;
The standby monitoring input unit B of the auxiliary signal processing device: the temperature sensing cable circuit is mainly composed of a terminal resistance circuit, a detection circuit, a control circuit and a temperature sensing cable circuit breaking monitoring circuit, wherein the control circuit is used for switching the terminal resistance circuit into the detection circuit and inputting signals detected by the detection circuit into the microprocessor when the microprocessor judges that the temperature sensing cable is broken;
An output unit of the secondary signal processing device: the microprocessor of the auxiliary signal processing device is mainly used for controlling and outputting a fire alarm or fault signal;
The microprocessor of the secondary signal processing device: the detection signal used for the standby monitoring input unit B, the temperature sensing cable disconnection monitoring circuit monitoring signal processing judgment and the control circuit control, and the output unit is controlled to output.
6. The cable type linear temperature-sensing fire detector according to claim 5, wherein the temperature-sensing cable break monitoring circuit monitors a voltage across a termination resistor in the termination resistor circuit.
7. The cable type linear temperature sensing fire detector according to claim 5, wherein the temperature sensing cable further comprises a control wire core for transmitting an electric signal to the secondary signal processing device when the primary signal processing device detects the disconnection of the temperature sensing cable.
8. A cable type line type heat fire detector according to claim 5,6 or 7, wherein the heat sensing cable is mainly composed of at least two detecting conductors and a same or different heat sensitive insulating material layer extruded outside each of the detecting conductors, and twisted together.
9. The cable type line type heat fire detector of claim 8 wherein the heat sensitive insulating material is a negative temperature coefficient heat sensitive insulating material or a fusible heat sensitive insulating material.
10. The cable type linear temperature-sensitive fire detector as claimed in claim 5, wherein,
The main signal processing device also comprises a standby monitoring input unit B, wherein one end of the adjacent temperature sensing cable is connected with the standby monitoring input unit B of the main signal processing device;
wherein:
the standby monitoring input unit B of the main signal processing device comprises a standby monitoring input unit B: the circuit mainly comprises a terminal resistance circuit, a detection circuit, a control circuit for mutually switching the terminal resistance circuit and the detection circuit, and an adjacent temperature sensing cable disconnection monitoring circuit, wherein when the microprocessor judges that the adjacent temperature sensing cable is disconnected, the control circuit switches the terminal resistance circuit into the detection circuit and inputs a signal detected by the detection circuit into the microprocessor;
A microprocessor of the main signal processing device: the detection signal of the standby monitoring input unit B of the main signal processing device, the monitoring signal processing judgment of the adjacent temperature sensing cable disconnection monitoring circuit and the control circuit are also used for controlling and controlling the output unit to correspondingly output.
11. The cable type linear temperature-sensitive fire detector as claimed in claim 5, wherein,
The auxiliary signal processing device also comprises a main monitoring input unit A, wherein one end of the adjacent temperature sensing cable is connected with the main monitoring input unit A of the auxiliary signal processing device;
wherein:
the main monitoring input unit A of the auxiliary signal processing device: the temperature sensing device mainly comprises a detection circuit for detecting adjacent temperature sensing cables, and signals detected by the detection circuit are input to a microprocessor;
The microprocessor of the secondary signal processing device: and the detection signal processing judgment unit is also used for detecting the detection signal processing judgment of the main monitoring input unit A of the auxiliary signal processing device and controlling the output unit to correspondingly output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910793816.7A CN112447017B (en) | 2019-08-27 | 2019-08-27 | Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910793816.7A CN112447017B (en) | 2019-08-27 | 2019-08-27 | Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112447017A CN112447017A (en) | 2021-03-05 |
| CN112447017B true CN112447017B (en) | 2024-09-13 |
Family
ID=74741973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910793816.7A Active CN112447017B (en) | 2019-08-27 | 2019-08-27 | Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112447017B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210983664U (en) * | 2019-08-27 | 2020-07-10 | 青岛中阳消防科技股份有限公司 | Cable type linear temperature-sensing fire detector capable of alarming fire when circuit is broken |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2858265B2 (en) * | 1990-01-26 | 1999-02-17 | 松下電工株式会社 | Fire alarm system having operation test function and analog sensor used in this system |
| JP3190811B2 (en) * | 1995-12-04 | 2001-07-23 | ホーチキ株式会社 | Receiving circuit of disaster prevention monitoring control panel |
| KR200194185Y1 (en) * | 2000-03-20 | 2000-09-01 | 주식회사창성에이스산업 | Digital extinguishing system |
| KR20040057233A (en) * | 2002-12-26 | 2004-07-02 | 김경주 | Repeater for fire monitoring system |
| JP4322071B2 (en) * | 2003-09-04 | 2009-08-26 | 株式会社 エニイワイヤ | Control and monitoring signal transmission system |
| CN101136128A (en) * | 2007-10-17 | 2008-03-05 | 张陈 | Beyond retrieve type single temperature alarming functional failure output linetype temperature-sensitive detector |
| CN100495458C (en) * | 2007-11-07 | 2009-06-03 | 张陈 | Irrecoverable type cable type line type fixed temperature fire detector |
| CN101226670B (en) * | 2008-02-02 | 2011-11-09 | 张陈 | Shorted fault and alarming method for beyond-retrieve-type cable-type line-type heat fire detector |
| CN101251943A (en) * | 2008-03-07 | 2008-08-27 | 张陈 | Series connecting fuse metal temperature-sensing circuit breaker type linear temperature-sensitive detector |
| CN201203925Y (en) * | 2008-05-16 | 2009-03-04 | 刘星 | Multifunctional liner temperature-sensing detector |
| CN103065420A (en) * | 2012-12-19 | 2013-04-24 | 邹志武 | Unrecoverable cable-type linear heat fire detector and alarm method thereof |
| RU2546328C2 (en) * | 2013-06-26 | 2015-04-10 | Панкратьев Николай Александрович | Fire alarm device for onboard automated fire extinguishing system |
| CN104376678A (en) * | 2014-12-09 | 2015-02-25 | 江苏中实电子有限公司 | Positioning type linear temperature sensing fire detector and alarm method thereof |
| CN205541247U (en) * | 2016-02-02 | 2016-08-31 | 江苏中实电子有限公司 | Two -parameter cable formula line type heat fire detector |
| CN205788616U (en) * | 2016-06-17 | 2016-12-07 | 无锡圣敏传感科技股份有限公司 | Line-type heat detector |
| CN107545692B (en) * | 2016-06-24 | 2023-12-19 | 首安工业消防有限公司 | Unrecoverable cable type linear temperature-sensing fire disaster detector |
| CN205862506U (en) * | 2016-08-10 | 2017-01-04 | 深圳市赋安安全系统有限公司 | A kind of stand alone type detector for electric fire protection |
-
2019
- 2019-08-27 CN CN201910793816.7A patent/CN112447017B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210983664U (en) * | 2019-08-27 | 2020-07-10 | 青岛中阳消防科技股份有限公司 | Cable type linear temperature-sensing fire detector capable of alarming fire when circuit is broken |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112447017A (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5793293A (en) | Temperature sensing system for over-heat detection | |
| US20070276613A1 (en) | Automatic Trip Device, Network System using it And Control Method Thereof | |
| EP3699619B1 (en) | Wiring-integrity automatic monitoring system having improved features | |
| CN101782611A (en) | On-line detector of surge protector | |
| CN103065420A (en) | Unrecoverable cable-type linear heat fire detector and alarm method thereof | |
| KR20200014118A (en) | Power Distribution Board with Fault Fiagnosis Function | |
| CN107545692A (en) | Beyond-retrieve-type cable-type line-type heat fire detector | |
| CN210983664U (en) | Cable type linear temperature-sensing fire detector capable of alarming fire when circuit is broken | |
| CN112447017B (en) | Cable type linear temperature-sensing fire detector for alarming fire during circuit breaking | |
| CN108877130B (en) | Temperature-sensing fire detector with terminal alarm indication function | |
| CN210924831U (en) | Cable type linear temperature-sensing fire detector with standard communication function and system thereof | |
| KR20220169387A (en) | Short-circuit isolator | |
| CN210777039U (en) | Cable type linear temperature-sensing fire detector capable of alarming fire in short circuit | |
| JP6482503B2 (en) | Water leak detection system | |
| CN112530121B (en) | A cable-type linear heat-sensing fire detector for alarming in case of short circuit | |
| Ma et al. | An approach for intelligent detection and fault diagnosis of vacuum circuit breakers | |
| KR102597249B1 (en) | Monitoring system and method for detecting connection error of remote terminal unit | |
| CN100495456C (en) | Alarming method for linear temperature-sensing fire hazard detector with double fixed temperature alarming threshold value | |
| JP4335507B2 (en) | Sensor wire break detection device | |
| KR102544329B1 (en) | Monitoring System for Cable Sheath Induced Voltage Reduction Device | |
| CN101650865A (en) | Linear temperature sensing fire detector with point-shaped temperature sensing element and alarm method thereof | |
| CN1987945A (en) | Short circuit warning method for non-recoverable linear temperature sensing detector | |
| CN201465257U (en) | Line type temperature sensing fire detector with point type temperature sensing element | |
| KR100960495B1 (en) | Digital protective relay | |
| KR100950348B1 (en) | Door alarm device to prevent random release |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |