CN115662048A - Linear light beam smoke-sensing fire detector with adjustable sensitivity and debugging method thereof - Google Patents
Linear light beam smoke-sensing fire detector with adjustable sensitivity and debugging method thereof Download PDFInfo
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- CN115662048A CN115662048A CN202211292038.1A CN202211292038A CN115662048A CN 115662048 A CN115662048 A CN 115662048A CN 202211292038 A CN202211292038 A CN 202211292038A CN 115662048 A CN115662048 A CN 115662048A
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Abstract
The invention discloses a linear beam smoke-sensing fire detector with adjustable sensitivity and a debugging method thereof, wherein the debugging method comprises the following steps: comparing the acquired input signal intensity with a detection set value, adjusting the gain, then re-comparing, and continuously circulating until the acquired input signal intensity is within the range of the detection set value, and finishing the self-adaptive regulation; otherwise, when the adjusted gain exceeds the adjustable range and the acquired input signal strength still can not reach the range of the detection set value, a false alarm is sent out. A debugging circuit is arranged in the self-adjusting sensitivity of the linear beam smoke-sensing fire detector, and the resistance value of a programmable resistor U6 in the debugging circuit is changed to control the gain of the linear beam smoke-sensing fire detector, so that the linear beam smoke-sensing fire detector can automatically adjust sensitivity gears according to different distances, and the adjustment of signal intensity of a transmitter and a receiver can be automatically completed after alignment with the transmitter is completed.
Description
Technical Field
The invention relates to the technical field of fire detectors, in particular to a linear light beam smoke-sensing fire detector with adjustable sensitivity and a debugging method thereof.
Background
At present, in a conventional fire alarm system, a line-type beam smoke fire detector transmits an infrared beam through a transmitter, and is disposed at a position opposite to a line-type beam smoke fire detection line through a reflector, so as to reflect the infrared beam, so that an infrared receiver can receive the infrared beam signal. When smoke exists on the light path of the detector, the signal received by the receiver is weakened, and when the signal is weakened to a certain threshold value, an alarm signal is generated.
Due to the distance between the reflector and the transmitter, the signal intensity transmitted from the transmitter to the receiver changes, and the signal intensity received by the receiver also changes. Therefore, the gain (the proportion of the circuit signal amplification) of transmitting and receiving infrared beams needs to be adjusted to meet the requirement that the equipment can normally operate under different distance conditions, so that different sensitivity gears need to be set for the linear beam smoke fire detector according to different detection distances in practice, and the gain of transmitting and receiving infrared beams is adjusted. In the prior art, when the sensitivity gear is adjusted, manual operations are required, such as: by using a special dial key.
Because all need artificial intervention to current product in actual installation and debugging, lead to its operation more loaded down with trivial details to work efficiency is lower, simultaneously because be the operation of artificial operation and dial-up button mode, hardly accomplish the continuity of regulation precision point (generally show as discrete regulation precision), can lead to the sensitivity of regulation not accurate enough easily like this, finally lead to equipment not to play fine alarm effect in the operation process.
Disclosure of Invention
In view of the above, the present invention is directed to a line-type beam smoke fire detector capable of automatically adjusting a sensitivity level and improving accuracy of adjusting the sensitivity level.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a linear light beam smoke fire detector with adjustable sensitivity comprises a debugging circuit for the self-adjusting sensitivity of the linear light beam smoke fire detector;
the debugging circuit comprises a signal output end, a signal input end, a programmable resistor U6, an operational amplifier U16, a first resistor R15, a second resistor R16, a first capacitor C19 and a second capacitor C32;
the signal input end is connected to one end of a first resistor R15, the other end of the first resistor R15 is connected with the positive electrode of the input end of an operational amplifier U16, the negative electrode of the input end of the operational amplifier U16 is respectively connected with one end of a second resistor R16, one end of a first capacitor C19 and the PWO port of a programmable resistor U6, the other end of the second resistor R16 is grounded, the output end of the operational amplifier U16, the other end of the first capacitor C19 and the PBO port of the programmable resistor U6 are simultaneously connected with the signal output end, the VDD port of the programmable resistor U6 is connected with one end of a second capacitor C32 and is connected with a power supply, the other end of the second capacitor C32 is grounded, and the VSS port of the programmable resistor U6 is grounded;
the voltage value at the signal input end is represented as Uin; the voltage value of the signal output end is expressed as Uout, the resistance value of the programmable resistor U6 is Rt, and the relationship between the signal input end and the signal output end is: uout = (Rt + R16)/16 × uin.
In a preferred embodiment of the present invention, the programmable resistor U6 has 128 steps.
The debugging method for adjusting the sensitivity of the linear beam smoke fire detector with adjustable sensitivity comprises the following steps:
step 1, starting a debugging circuit of the linear beam smoke fire detector to detect an input signal of the linear beam smoke fire detector, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and executing step 2 if the input signal is not proper;
step 4, increasing the gain of the input signal, then judging whether the gain is the maximum, if not, executing the step 1, and if so, executing the step 5;
and 5, detecting the input signal, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and giving an alarm if the input signal is not proper.
The debugging method is as follows:
when the acquired input signal intensity is larger than the detection set value range, reducing the gain, and re-comparing the input signal intensity;
when the acquired input signal intensity is smaller than the detection set value range, increasing the gain and re-comparing the input signal intensity;
when the acquired input signal intensity is within the range of the detection set value, the self-adaptive regulation is completed;
and when the adjusted gain exceeds the adjustable range and the acquired input signal strength still cannot reach the range of the detection set value, giving out a false alarm.
The invention has the beneficial effects that: the function of self-detecting signal intensity and adjusting sensitivity gear through the linear light beam smoke fire detector makes the linear light beam smoke fire detector adjust the sensitivity gear automatically according to different distances, and makes the adjustment of the signal intensity of the transmitter and the receiver can be completed automatically after the alignment with the transmitter is completed. Therefore, the installation of the linear beam smoke fire detector can be simplified, and the engineering installation time is reduced; meanwhile, the continuity of the adjustment precision points is realized through a debugging circuit, so that the adjustment precision is improved; and the manual excessive operation can be avoided, and the manual misoperation is avoided.
Drawings
FIG. 1 is a circuit diagram of a debugging circuit in a line-type beam smoke fire detector of adjustable sensitivity of the present invention;
FIG. 2 is a flow chart of a method for adjusting the sensitivity of a linear beam smoke fire detector according to the present invention;
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, a linear beam smoke fire detector with adjustable sensitivity comprises a debugging circuit for adjusting the sensitivity of the linear beam smoke fire detector;
the debugging circuit comprises a signal output end, a signal input end, a programmable resistor U6, an operational amplifier U16, a first resistor R15, a second resistor R16, a first capacitor C19 and a second capacitor C32;
the signal input end is connected to one end of a first resistor R15, the other end of the first resistor R15 is connected with the positive electrode of the input end of an operational amplifier U16, the negative electrode of the input end of the operational amplifier U16 is respectively connected with one end of a second resistor R16, one end of a first capacitor C19 and the PWO port of a programmable resistor U6, the other end of the second resistor R16 is grounded, the output end of the operational amplifier U16, the other end of the first capacitor C19 and the PBO port of the programmable resistor U6 are simultaneously connected with the signal output end, the VDD port of the programmable resistor U6 is connected with one end of a second capacitor C32 and is connected with a power supply, the other end of the second capacitor C32 is grounded, and the VSS port of the programmable resistor U6 is grounded;
the voltage value of the signal input end is represented as Uin; the voltage value of the signal output terminal is expressed as Uout, the resistance value of the programmable resistor U6 is Rt, and the relationship between the signal input terminal and the signal output terminal is: uout = (Rt + R16)/16 × uin.
The debugging circuit of the self-adjusting sensitivity of the linear light beam smoke fire detector adopts the operational amplifier to amplify the input signal of the debugging circuit (the voltage value of the circuit input end is used as the circuit input signal) in proportion, then the signal after the proportion amplification is output, the amplified debugging circuit input signal in proportion can be realized by changing the resistance in the circuit, namely changing the resistance value of a certain element in the debugging circuit, and the amplified proportion of the circuit can be changed by changing the resistance value of a programmable resistor U6 in the debugging circuit through a control program, so that the signal amplification proportion of the debugging circuit can be changed.
In a preferred scheme of the invention, the programmable resistor U6 has 128 gears, so that the points of the adjusting precision can be almost continuous, the adjusting precision is improved, and the efficient operation of the equipment is guaranteed.
Referring to fig. 2, the sensitivity adjustment debugging method of the line-type beam smoke fire detector adopting the sensitivity adjustment comprises the following steps:
step 1, starting a debugging circuit of the linear beam smoke fire detector to detect an input signal of the linear beam smoke fire detector, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and executing step 2 if the input signal is not proper;
step 4, increasing the gain of the input signal, then judging whether the gain is the maximum, if not, executing the step 1, and if so, executing the step 5;
and 5, detecting the input signal, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and giving an alarm if the input signal is not proper.
A debugging method as described above, the debugging method comprising:
when the acquired input signal intensity is larger than the detection set value range, reducing the gain, and re-comparing the input signal intensity;
and when the adjusted gain exceeds the adjustable range and the acquired input signal strength still cannot reach the range of the detection set value, giving out a false alarm.
When the acquired input signal intensity is within the range of the detection set value, the self-adaptive regulation is completed;
when the adjusted gain reaches the slow range and the acquired input signal strength still can not reach the range of the detection set value, an error alarm is sent out.
The debugging method mainly carries out automatic control and adjustment on the sensitivity gear of the linear beam smoke fire detector in a closed-loop adjustment mode, and adjusts the resistance value of the programmable resistor through a program, so that the gain (the amplification ratio of a circuit signal) for sending and receiving infrared beams is automatically adjusted and changed, the signal intensity of the sent and received beams after adjustment is acquired through software after each adjustment, and the effect of closed-loop adjustment is achieved; this is analyzed by the software. If the gain adjustment reaches the maximum or minimum range, the range of the gain adjustment can reach 0.1-100 times, and the acquired signal intensity of the transmitted and received light beams is still not in the range of a set value (set according to the distance between the reflector and the transmitter), the linear light beam smoke fire detector can give an alarm to ensure that the equipment can normally operate, so that the user can be reminded when the linear light beam smoke fire detector per se fails or exceeds the range of the detection set value.
The linear beam smoke fire detector can automatically adjust the sensitivity gear according to different distances through the functions of self detection signal strength and sensitivity gear adjustment of the linear beam smoke fire detector, and can automatically complete signal intensity adjustment of the transmitter and the receiver after alignment with the transmitter is completed. Therefore, the installation of the linear beam smoke fire detector can be simplified, and the engineering installation time is reduced; meanwhile, the continuity of the adjustment precision points is realized through a debugging circuit, so that the adjustment precision is improved; and the manual excessive operation can be avoided, and the manual misoperation is avoided.
Claims (4)
1. A linear light beam smoke fire detector with adjustable sensitivity is characterized by comprising a debugging circuit for the linear light beam smoke fire detector with the adjustable sensitivity;
the debugging circuit comprises a signal output end, a signal input end, a programmable resistor U6, an operational amplifier U16, a first resistor R15, a second resistor R16, a first capacitor C19 and a second capacitor C32;
the signal input end is connected to one end of a first resistor R15, the other end of the first resistor R15 is connected with the positive electrode of the input end of an operational amplifier U16, the negative electrode of the input end of the operational amplifier U16 is respectively connected with one end of a second resistor R16, one end of a first capacitor C19 and the PWO port of a programmable resistor U6, the other end of the second resistor R16 is grounded, the output end of the operational amplifier U16, the other end of the first capacitor C19 and the PBO port of the programmable resistor U6 are simultaneously connected with the signal output end, the VDD port of the programmable resistor U6 is connected with one end of a second capacitor C32 and is connected with a power supply, the other end of the second capacitor C32 is grounded, and the VSS port of the programmable resistor U6 is grounded;
the voltage value at the signal input end is represented as Uin; the voltage value of the signal output terminal is expressed as Uout, the resistance value of the programmable resistor U6 is Rt, and the relationship between the signal input terminal and the signal output terminal is: uout = (Rt + R16)/16 × uin.
2. The line-type beam smoke detector as claimed in claim 1, wherein said programmable resistor U6 is 128 stages.
3. The sensitivity-adjustable line-type beam smoke fire detector as claimed in claim 1, wherein the sensitivity-adjustable debugging method comprises the following steps:
step 1, starting a debugging circuit of the linear beam smoke fire detector to detect an input signal of the linear beam smoke fire detector, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and executing step 2 if the input signal is not proper;
step 2, judging the strength of the input signal, if the input signal is strong, executing step 3, and if the input signal is weak, executing step 4;
step 3, reducing the gain of the input signal, then judging whether the gain is minimum, if not, executing the step 1, and if so, executing the step 5;
step 4, increasing the gain of the input signal, then judging whether the gain is the maximum, if not, executing the step 1, and if so, executing the step 5;
and 5, detecting the input signal, finishing debugging if the input signal is proper, outputting the input signal as an output signal, and giving an alarm if the input signal is not proper.
4. The debugging method according to claim 3, characterized in that the debugging method comprises:
when the acquired input signal intensity is larger than the detection set value range, reducing the gain, and re-comparing the input signal intensity;
when the acquired input signal intensity is smaller than the detection set value range, increasing the gain and re-comparing the input signal intensity;
when the acquired input signal intensity is within the range of the detection set value, the self-adaptive regulation is completed;
and when the adjusted gain exceeds the adjustable range and the acquired input signal strength still cannot reach the range of the detection set value, giving out a false alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211292038.1A CN115662048A (en) | 2022-10-21 | 2022-10-21 | Linear light beam smoke-sensing fire detector with adjustable sensitivity and debugging method thereof |
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| CN202211292038.1A CN115662048A (en) | 2022-10-21 | 2022-10-21 | Linear light beam smoke-sensing fire detector with adjustable sensitivity and debugging method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481988A (en) * | 2023-04-27 | 2023-07-25 | 营口天成消防设备有限公司 | Automatic adjusting method for reflection type linear light beam smoke fire detector |
| CN117912185A (en) * | 2024-03-19 | 2024-04-19 | 西安博康电子有限公司 | Infrared flame detection system and far and near flame identification method |
-
2022
- 2022-10-21 CN CN202211292038.1A patent/CN115662048A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481988A (en) * | 2023-04-27 | 2023-07-25 | 营口天成消防设备有限公司 | Automatic adjusting method for reflection type linear light beam smoke fire detector |
| CN117912185A (en) * | 2024-03-19 | 2024-04-19 | 西安博康电子有限公司 | Infrared flame detection system and far and near flame identification method |
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