JPH09223284A - Sensor, analog type monitoring system and abnormality monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily or reliably perform a prescribed monitoring processing on a receiver side by making a transmission means return information, for which judgement information and editing-processed detection signal information are gathered in a prescribed format, to a receiver as return information. SOLUTION: A signal processing means 13 is provided with a judgement processing function for judging whether or not a prescribed event occurs based on detection signals from a detection means 11 and an editing processing function for executing a prescribed editing processing to the detection signal from the detection means 11 so as to turn it to the one of less information amount. Then, the information for which the judgement information and the editing- processed detection signal information are gathered in the prescribed format is supplied to the transmission means 12 and returned to the receiver 1 as the return information through the transmission means 12. Thus, the monitoring processing relating to the prescribed event is easily or reliably performed on the side of the receiver 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor used for fire detection and crime prevention detection, an analog type monitoring system and an abnormality monitoring method.

[0002]

2. Description of the Related Art Generally, in the field of fire monitoring, a fire monitoring system using an on / off type fire detector (hereinafter referred to as a P type fire monitoring system) and a fire monitoring system using an analog type fire detector are used. Two types of fire monitoring systems, known as a system (hereinafter referred to as an analog fire monitoring system), are known.

Here, the P-type fire monitoring system is shown in FIG.
As shown in FIG. 3, the on / off type fire detectors 202-1 to 202 are connected to the pair of lines 203 from the P type fire receiver 201.
When -n (n ≧ 1) is connected and the on / off type fire detector, for example, 202-1 detects a fire, the line 203 is changed from a high impedance (off) state to a low impedance (on).
By setting the state, the P-type fire receiver 201 is configured to notify the occurrence of a fire.

On the other hand, in the analog type fire monitoring system, as shown in FIG. 34, the transmission line 10 extending from the receiver 101 is used.
3 are connected to the analog fire detectors 102-1 to 102-n, and the analog fire detectors 102-1 to 102-1 are connected to the analog fire detectors 102-1 to 102-n.
2-n is called from the receiver 101 via the transmission path 103 (address polling) to transmit predetermined information such as detection data from the analog fire detectors 102-1 to 102-n. Receiver 10 via path 103
It is configured to return to 1.

More specifically, an analog fire detector used in an analog fire monitoring system generally transmits information to and from a receiver 101 via a transmission path 103.
Transmission means (for example, transmission IC) for performing (information transfer)
111 and a detection means 112 for detecting the signal level of a physical phenomenon (fire phenomenon) such as smoke or heat are provided, and it is said that a call (polling) from the receiver 101 is made in the transmission means 111 of a certain sensor. When judged, the transmission means 111 of the fire detector returns the detection signal of the physical phenomenon detected by the detection means 112, that is, the signal level itself as information to the receiver 101 via the transmission path 103. There is. Therefore, in the analog type fire monitoring system, the analog type fire detector side does not make a fire judgment or the like, but the receiver 101 collects the detection signals from the respective analog type fire detectors by polling. ing.

Such an analog type fire monitoring system is easier to install than the P type fire monitoring system described above, and a detection signal can be individually obtained from each analog type fire detector in the receiver. Therefore, it is possible to identify the fire occurrence point, and since the analog type fire detector returns the detection signal of the physical phenomenon, that is, the signal level as it is, it is possible to judge whether it is a fire based on this signal level, Further, by monitoring the signal level, there is an advantage that the trend of the physical phenomenon can be known and the analysis of the fire can be performed with high reliability.

Further, in the analog type fire monitoring system, since the receiver 101 side can call the analog type fire detector by polling and collect information from the analog type fire detector, it is possible to carry out fire monitoring such as fire judgment and fire analysis. The advantage is that the receiver can automatically detect a failure of the analog type fire detector. That is, in the P-type fire monitoring system, the detector cannot be called from the receiver side. Therefore, when testing or inspecting the detector, the operator should go to the detector and remove it. However, in the analog fire monitoring system, the detector can be automatically tested and inspected on the receiver side, so the detector is installed in a place where it is difficult to work, for example. However, this sensor can be inspected very easily.

[0008]

Due to these advantages, those skilled in the art have recently been able to configure the sensor as an analog sensor and use this sensor in an analog monitoring system. This has been desired, and conventionally, heat detectors, smoke detectors, etc. have been configured as analog type detectors, and have been used for analog type fire monitoring systems. In other words, in heat detectors and smoke detectors,
Due to the nature of physical quantities such as heat and smoke, the temporal change in signal level is gradual, so it is necessary for the receiver to judge whether or not there is a fire in a short time (for example, about several tens of milliseconds) of temperature and smoke concentration. (Time interval information) is not always necessary,
Only long-term (for example, about 5 seconds) time change information is sufficient. Therefore, when the heat detector or smoke detector is configured as an analog detector and is used in an analog fire monitoring system, the heat detector or smoke detector may detect the temperature signal or smoke concentration signal in its detection means. The signal level of is detected in a form that is integrated over a polling cycle (for example, a polling cycle of 5 seconds), and when polling is received from the receiver, the temperature signal level integrated value and smoke concentration signal level integrated value at that point are It suffices to return the information as the return information. In this case, the receiver has a polling period of 5
If it is seconds, the temperature signal level integrated value and the smoke concentration signal level integrated value from the heat sensor and the smoke sensor collected by the polling at the interval of 5 seconds (the temperature signal level integrated value and the smoke concentration signal at every 5 seconds interval It is possible to determine whether or not there is a fire based on the level integrated value).

That is, in the heat detector and the smoke detector, as the information returned to the receiver, for example, only one temperature signal level integrated value or smoke concentration signal level integrated value is sent at one polling. Since it is good, the return information can be about several bits (for example, about 6 to 8 bits), and the transmission means 111 can process a small amount (return information amount (return bit number) can be small). Low cost transmission I
Even when C is used, the return information can be transmitted to the receiver in a short time.

More specifically, in an analog type fire monitoring system, serial transmission is generally used to exchange signals between a receiver and a detector, and therefore a transmission speed cannot be expected, so that a single detector is used. There is a limit to the amount of information that can be obtained. On the other hand, the detector has an input equivalent to a fire, and the time limit until the receiver confirms this is set to 5 seconds by law.

In the case of a heat sensor or a smoke sensor, when it is configured as an analog type sensor, as described above, as information returned to the receiver, for example, at the time of one polling, 1
Since it is sufficient to send only one temperature signal level integrated value and smoke density signal level integrated value, this return information can be returned to the receiver within 5 seconds and the receiver can confirm reception.

However, in the infrared flame detector,
A short-time fluctuation phenomenon (time change) peculiar to a flame is important information for judging (detecting) whether or not it is a flame. Therefore, when the flame detector is configured as an analog type sensor and the receiver is to determine whether or not there is a flame based on the information returned from the flame detector, the heat detector or smoke detector Thus, for example, if the detection signal levels are integrated over a polling period of 5 seconds, the information regarding the short-time fluctuation phenomenon peculiar to the flame is completely lost, and the receiver determines whether or not the flame is present. It becomes impossible to judge accurately.

On the other hand, in order for the receiver to accurately determine whether or not there is a flame on the basis of the information returned from the flame detector, conventionally, a predetermined sampling interval Δt from the detection means of the flame detector is used. It was proposed that all the information (detection data) output at every (the time interval of 10 msec necessary to capture the flame fluctuation phenomenon) to be returned to the receiver as the return information, but in this case Has a large amount of information (data amount), and it is not possible to transmit this large amount of information (detection data) to the receiver within a predetermined time (for example, within 5 seconds) and have the receiver confirm reception. I can't.

Therefore, conventionally, only the heat detector, the smoke detector, etc. can be used as the analog type detector of the analog type fire monitoring system, and the infrared flame detector is used as the analog type detector. Was not configured. That is, the infrared flame detector could not be used in an analog fire monitoring system.

Such a problem is not limited to the infrared type flame detector, and in determining whether or not a predetermined event (flame in the above example) has occurred, the physical quantity associated with the event is determined. A large amount of detection data is generally required to accurately determine whether or not a given event has occurred, that is, any sensor for which a short time change (fluctuation phenomenon in the above example) is important. Arbitrary detectors (sensors for fire detection, crime prevention detection, etc.)
It also occurs when trying to use an analog surveillance system (an analog fire surveillance system, an analog security surveillance system, etc.). Therefore, in the past, it was necessary to determine whether or not a predetermined event occurred. Regarding the sensor in which the amount of information of the detected signal is large, it cannot be configured as an analog sensor and cannot be used in an analog monitoring system.

In the present invention, in determining whether or not a predetermined event (such as a flame) has occurred, a short-term temporal change of the physical quantity associated with the event is detected. It is an object of the present invention to provide a sensor, an analog type monitoring system, and an abnormality monitoring method that can be used as an analog type sensor of an analog type monitoring system.

Further, according to the present invention, when the sensor is configured as an analog type sensor, the receiver side performs a monitoring process regarding a predetermined event based on the return information from the sensor.
It is an object of the present invention to provide a sensor and an analog type monitoring system and an abnormality monitoring method that can be performed easily or more reliably than before.

A further object of the present invention is to provide a sensor which can be used not only as an analog type sensor but also as an on / off type sensor.

[0019]

In order to achieve the above-mentioned object, in the invention described in claims 1 to 5, a detection means for detecting a predetermined physical quantity, and a detection signal of the physical quantity detected by the detection means. Signal processing means for performing a predetermined signal processing to the receiver, and transmission means configured to be called by the receiver and returning predetermined information to the receiver when the receiver calls the signal processing means. Is a predetermined processing based on the detection signal detected by the detection means when the transmission means is called from the receiver, with a determination processing function of determining whether or not a predetermined event has occurred based on the detection signal detected by the detection means. The amount of information returned from the transmission means to the receiver is small when the information of (1) is returned from the transmission means to the receiver, and
When the receiver receives the information, the receiver has an edit processing function of performing edit processing on the detection signal detected by the detection means to the extent that the receiver can monitor the predetermined event based on the information. Then, the detection signal information edited to a small amount of information is provided to the transmission means together with the determination information as to whether or not a predetermined event has occurred, and the transmission means determines the determination information and the edited detection signal information to be predetermined. The information summarized in the format is returned to the receiver as return information. As a result, based on the return information from the sensor, the receiver side can perform the monitoring process regarding a predetermined event more easily or more reliably than before. Furthermore, if the inventions according to claims 1 to 5 are applied, a short-term temporal change of the physical quantity associated with the event is important in determining whether or not a predetermined event has occurred. Sensor for detecting the physical quantity
For example, an infrared flame sensor can also be configured as an analog sensor, which can be used in existing analog surveillance systems.

Further, in the invention according to claims 6 to 10, a detection means for detecting a predetermined physical quantity, and a signal processing means for performing a predetermined signal processing on a detection signal of the physical quantity detected by the detection means. And a transmission means configured to be callable from the receiver and returning predetermined information to the receiver when called from the receiver, wherein the signal processing means is based on the detection signal detected by the detection means. Has a determination processing function of determining whether or not a predetermined event has occurred, and provides the transmission means with the detection signal information from the detection means together with the determination information as to whether or not the predetermined event has occurred, and the transmission means, Information in which the judgment information and the detection signal information are put together in a predetermined format is returned to the receiver as return information. As a result, based on the return information from the sensor, the receiver side can perform the monitoring process regarding a predetermined event more easily or more reliably than before.

According to the invention of claim 11, in the sensor according to any one of claims 1 to 10, the sensor is further provided between a pair of lines extending from the P-type receiver. The sensor is further configured to be connectable, and the sensor is further provided with a switching means for controlling on / off of conduction between a pair of lines extending from the P-type receiver based on the judgment information as to whether a predetermined event has occurred. The sensor can be used as an analog type sensor that returns information for return from the transmission means to the receiver by calling from the receiver, and between the pair of lines extending from the P type receiver. When connected, it is configured to be usable as an ON / OFF type sensor that controls ON / OFF of the conduction between the pair of lines based on the judgment information. As a result, it can be used not only as an analog type sensor but also as an on / off type sensor.

In the twelfth and thirteenth aspects of the present invention, an analog type sensor is called from the receiver side, and the called analog type sensor outputs predetermined information detected by the analog type sensor. In the analog type monitoring system of the type that returns to the receiver side and carries out monitoring for a predetermined event at the receiver side, the analog type sensor is a sensing device according to any one of claims 1 to 11. It is possible to use a detector, and in this case, when the sensor is called from the receiver, the sensor stores the information in which the judgment information and the detection signal information on the sensor side are gathered in a predetermined format, It is returned to the receiver as return information. As a result, based on the return information from the sensor, the receiver side can easily or more reliably perform monitoring processing regarding a predetermined event than in the conventional case.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a sensor according to the present invention. The example of FIG. 1 shows a state in which the sensor 2 is connected to the receiver 1 of the analog type monitoring system via the transmission line 3 and is used as the analog type sensor of the analog type monitoring system. .

Referring to FIG. 1, the sensor 2 includes a detection means 11 for detecting a predetermined physical quantity, and a signal processing means 13 for performing a predetermined signal processing on the detection signal detected by the detection means 11. , Which can be called from the receiver 1,
And a transmission means 12 for returning predetermined information to the receiver 1 when called from the receiver 1 (for example, address polling).

Here, the signal processing means 13 is the detecting means 1
Based on the detection signal from 1, the determination processing function of determining whether or not a predetermined event has occurred (for example, determination of whether a flame or a fire has occurred) and the detection signal from the detection means 11 On the other hand, when the receiver 1 receives the small amount of information (for example, about 5 bits to 7 bits), the receiver 1 monitors the predetermined event based on the detection signal ( For example, it has an edit processing function for performing a predetermined edit processing to the extent that a predetermined event can be analyzed, and determines whether or not a predetermined event has occurred (judgment result, for example, 1-bit information). Amount) and edited detection signal information (for example, an information amount of about 5 to 7 bits) are provided to the transmission means 12.

Further, the transmission means 12, when called from the receiver 1 (for example, when address polling), determines whether or not a predetermined event (for example, fire) has occurred.
Information in which the determination information (determination result) on the side and the detection signal information edited to a small amount of information are put together in a predetermined format is returned to the receiver 1 as return information.

FIG. 2 shows an example of return information sent from the transmission means 12 of the sensor 2 to the receiver 1.
In the example of FIG. 2, the return information includes the sensor type information A ₀ ,
Signal information A ₁ is constituted by a one bit (in the example of FIG. 2 most significant bits) determines whether information (determination result) has occurred a predetermined event of the signal information A ₁ to B ₁ allocation,
The other remaining bits are assigned to the edited detection signal information B ₂ . Specifically, in a general analog fire monitoring system, the detector type information of the return information from the fire detector is generally configured as 2 bits, and the signal information A ₁ is 6 bits or 8 bits. Is configured as a bit. When the same format as the fire detector of such a general analog fire monitoring system is used as the return information of the detector of FIG. 1, when the signal information A ₁ is configured as, for example, 8 bits ( (When configured as in the example of FIG. 2), for example, one bit of them is allocated to the judgment information (judgment result) B ₁ , and the other 7 bits are allocated to the edited detection signal information B ₂ . be able to. In this case, the detection signal from the detection means 11 may be edited into an analog value in the range of 0 to 127. Also, the signal information A
_{When 1} is configured as, for example, 6 bits, for example, 1 bit among them may be assigned to the determination information (determination result) B ₁ , and the remaining 5 bits may be assigned to the edited detection signal information B _2. it can. In this case, the detection signal from the detection means 11 may be edited into an analog value in the range of 0 to 31.

As described above, in the sensor 2 of FIG. 1, even when the information amount (the number of detected data) of the detection signal from the detection means 11 becomes large, the detection signal from the detection means 11 is set to a predetermined value. Information on whether or not an event (for example, flame or fire) has occurred
(Judgment result; for example, 1-bit information) and detection signal information edited to a small amount of information (for example, 5-bit or 7-bit information amount) are processed and transmitted when there is a call from the receiver 1. From the means 12 to the receiver 1, the information amount reduced as described above (the information for judging whether or not a predetermined event has occurred (for example, 1-bit information) B ₁ and the information amount which is small are edited. Detection signal information (for example, information amount of 5 bits or 7 bits) B ₂ and a total of 6 bits or 8
Since information of about a bit) is returned as one return information, it is possible to use this sensor as an analog sensor of an existing analog monitoring system. In other words, even a sensor in which the amount of information of the detection signal from the detection means 11 is large can be configured as an analog sensor, for example, an existing analog sensor as shown in FIG. It can be used in a surveillance system and can enjoy various advantages as described above of an analog type surveillance system.

For example, in the receiver 1, it is possible to monitor a predetermined event (for example, fire) based on the return information from the sensor 2. Specifically, for example, a predetermined notification (alarm) process is performed based on the judgment information B ₁ of the return information from the sensor 2, or the detection of the return information from the sensor 2 is performed. For example, by displaying a trend graph of the signal information B ₂ and monitoring changes in the detected signal information (for example, signal level), the trend of the event can be analyzed. Further, when the receiver 1 has automatic test and inspection functions, the automatic test and inspection functions of the receiver 1 are used to perform automatic inspection (for example, automatic periodic inspection) of the sensor 2 to save labor. Can be achieved.

The amount of information to be returned is very small.
(For example, the information amount of several bits), the transmission means 12 of the sensor 2 is a low-cost transmission IC used in a general analog type sensor, that is, a processing amount. A small amount is required (amount of information returned (number of bits returned)
However, a low-cost transmission IC can be used.

Therefore, the sensor 2 having the configuration of FIG.
In determining whether or not a predetermined event (such as a flame) has occurred, a sensor for detecting a physical quantity for which a short-term time change of the physical quantity associated with the event is important, that is, A sensor (for example, an infrared flame sensor (a sensor in which the infrared detecting means is used as the detecting means 11)) that has a large amount of information (the number of detected data) of the detection signal from the detecting means 11 It is useful in constructing an analog type sensor.

On the receiver 1 side, a predetermined notification process (for example, based on the judgment information B ₁ of the return information from the sensor 2 (for example, the return information in the format shown in FIG. 2)) (Alarm processing), etc. can be performed. That is, since the determination information is sent from the sensor 2 side, the receiver 1 side does not need to perform a process of determining whether a predetermined event (for example, a fire) has occurred, and the determination information from the sensor 2 side is not necessary. Based on the above, notification processing (alarm processing) or the like can be directly performed. Also, on the receiver 1 side, for example, based on the detection signal information B ₂ that is edited to the extent that a predetermined event in the return information from the sensor 2 can be analyzed, for example, a predetermined event It is possible to analyze a situation (for example, fire), for example, a trend. Specifically, for example, on the receiver 1 side, when the judgment information B ₁ on the sensor side is “abnormal (bit is“ 1 ”)”, an alarm can be issued. Further, the information B ₂ of the edited detection signal can be displayed as a trend graph, for example. In this case, the operator of the receiver 1
When the alarm sounds based on the judgment information B ₁ on the sensor side, the situation can be comprehensively judged and analyzed by looking at the trend graph. Furthermore, by the trend graph,
It is also possible to analyze the process (trend) until a predetermined event (eg fire) occurs. As described above, according to the present invention, on the receiver 1 side, in the case of monitoring the predetermined event based on the return information from the sensor 2,
Since it is not necessary to independently perform the process of determining whether or not a predetermined event has occurred in the receiver 1, the monitoring process is easier than in the conventional case.

In the above example, it is assumed that the receiver 1 side does not perform the process of determining whether or not a predetermined event has occurred, but the receiver 1 side returns the sensor 2 if necessary. It is also possible to independently perform the determination process based on the detection signal information B ₂ of the usage information. In this case, for example, the information B ₁ of the judgment result on the sensor side included in the same return information from the sensor 2 is further added to the judgment result unique to the receiver 1 side, Whether or not a predetermined event (for example, fire) has occurred can be comprehensively judged, and reliability can be improved.

Further, in the configuration example of FIG. 1, the signal processing means 13 determines, as shown in FIG. 3A, whether or not a predetermined event has occurred (determination result, for example, 1-bit information).
The information of the detection signal edited to a small amount of information (for example, the amount of information of about 5 bits to 7 bits) may be separately provided to the transmission means 12, or FIG.
As shown in (b), the judgment information (judgment result, for example, 1-bit information) as to whether a predetermined event has occurred and the detection signal information (for example, 5 bits to 7 bits) edited to a small amount of information.
The information amount of about bits) may be put together in a predetermined format (for example, edited into a format as shown in FIG. 2) and given to the transmission means 12. In the case of FIG. 3 (a), it is necessary for the transmission means 12 to assemble it into a predetermined format, but in the case of FIG. 3 (b),
Since the collected information is given to the transmission means 12, the transmission means 12 does not have to carry out the collected information.

Further, in the configuration example of FIG. 1, the signal processing means 13 of the sensor 2 has both the judgment processing function and the editing processing function, but these functions are separate means. May be realized as. FIG. 4 is a diagram showing a modified example of the sensor of FIG. 1. In the example of FIG. 4, the sensor 2 is
Detecting means 11 for detecting a predetermined physical quantity, and detecting means 11
The determination means 14 for determining whether or not a predetermined event has occurred (for example, determination as to whether or not a fire has occurred) based on the detection signal detected by the detection signal detected by the detection means 11. A signal processing unit 13 for performing a predetermined signal processing on a signal, and a receiver 1 which can be called, and when the receiver 1 calls (for example, address polling), predetermined information is given to the receiver 1. It has the transmission means 12 which returns.

Here, the judging means 14 is adapted to judge whether or not a predetermined event has occurred. Further, the signal processing means 13 receives from the transmission means 12 when the transmission means 12 is called by the receiver 1 and returns predetermined information based on the detection signal detected by the detection means 11 from the transmission means 12 to the receiver. The amount of information returned to the machine 1 is small, and when the receiver 1 receives the information, the receiver 1 monitors the predetermined event (for example, flame or fire) based on the information (for example, Editing processing is performed on the detection signal detected by the detection means 11 to the extent that analysis of flames and fires) can be performed. Further, the transmission means 12 determines the judgment means 1 when the receiver 1 calls the receiver 1 (for example, when address polling is performed).
Information in which the determination information (determination result) from 4 and the detection signal information edited by the signal processing unit 13 are put together in a predetermined format is returned to the receiver 1 as return information. .

In other words, in the configuration example of FIG. 4, the editing processing function is given to the signal processing means 13, and the judgment processing function is given to the judgment means 14 independently of the signal processing means 13.

Incidentally, in the configuration example of FIG.
4 and the signal processing means 13, as shown in FIG. 5 (a), the judgment information (judgment result, for example, 1-bit information) as to whether or not a predetermined event has occurred and the detection processed as a small amount of information. Signal information (for example, an information amount of about 5 bits to 7 bits) may be separately provided to the transmission means 12, or, as shown in FIG. 5B, whether or not a predetermined event has occurred. Determination information (determination result, for example, 1-bit information) and detection signal information edited to a small information amount (for example, information amount of about 5 bits to 7 bits) are converted into a predetermined format in the signal processing means 13, for example. Put together
The compiled information may be given to the transmission means 12 (for example, by editing in the format as shown in FIG. 2).

Further, the sensor 2 as shown in FIGS.
In the above, in the signal processing means 13 (further, the judging means 14), the process of generating the return information (including the process of editing the detected signal information and the process of judging whether or not a predetermined event has occurred) is a polling cycle. When the polling cycle is not constant, it can be performed in synchronization with the cycle of the call (polling) from the receiver 1. When the polling cycle is not constant, the cycle of the call (polling) from the receiver 1 is asynchronous. Can be done at.

Here, the calling cycle (polling cycle) means that one analog type sensor is called by the receiver 1 and then the analog type sensor is called by the receiver 1 from the time when the analog type sensor is called (polled) by the receiver 1. It means the period until it is done. For example, in the analog fire monitoring system as shown in FIG. 34, the receiver 101 sequentially and repeatedly calls each of the analog sensors 102-1 to 102-n.
(Polling). For example, sensor 1
02-1, sensor 102-2, ..., Sensor 102-n,
Sensor 102-1, sensor 102-2, ..., Sensor 10
2-n, the detectors 102-1 ... Are cyclically repeatedly called (polling) in this order. In this case, one detector, for example, 102-1 is called (polled). The period from the time point to the time point when the sensor 102-1 is next called (polled) is generally called a calling cycle (polling cycle).

That is, in the sensor 2 shown in FIGS. 1 and 4, the signal processing means 13 (and further the judging means 14) is
When the polling cycle is constant, the above-described processing for generating return information is performed for a predetermined period T in synchronization with the call from the receiver 1, and the transmission means 12 synchronizes with the call from the receiver 1. Then, the generated return information can be returned to the receiver 1. On the other hand, when the polling period is not constant, for example, the sensor side activates a timer for independently counting the predetermined period T to perform the process of generating the return information (that is, the signal processing unit 13 (and the determination unit). (14) performs the above-described return information generation processing for each predetermined period T), holds the generated return information, and the transmission means 12 retains it when called from the receiver 1. The returned information for return can be returned to the receiver 1.

FIG. 6 is a diagram showing an example of the configuration of an infrared type (single wavelength type) flame detector 2 to which the present invention is applied. FIG.
In the above example, the flame sensor 2 has a configuration corresponding to the sensor of FIG. That is, in the flame detector 2, the infrared detecting means 11 for detecting infrared rays having a wavelength peculiar to the flame is used as the detecting means 11 of the sensor 2 of FIG. Further, the signal processing means 13 includes an infrared detecting means 11
Based on the infrared detection signal detected in step 1, the transmission means 12 is called from the receiver 1 and a predetermined value based on the infrared detection signal detected by the infrared detection means 11 together with a judgment processing function for judging whether or not there is a flame. When the information is returned from the transmission means 12 to the receiver 1, the amount of information returned from the transmission means 12 to the receiver 1 is small, and when the information is received by the receiver 1, the receiver 1 In the above, the editing processing function is provided to perform the editing processing on the infrared detection signal detected by the infrared detection means 11 to the extent that the monitoring (for example, analysis of the flame) regarding the flame can be performed based on the information.

FIG. 7 shows the signal processing means 13 of the flame detector of FIG.
FIG. 3 is a diagram showing an example of the configuration of FIG. In the example of FIG. 7, the signal processing means 13 has a configuration corresponding to FIG. That is, the signal processing unit 13 calculates the average peak level of the infrared detection signal from the infrared detection unit 11 over the predetermined period T as the edited detection signal information, and the edit processing unit 15 calculates the average peak level. A flame determination unit 17 that determines a flame when the average peak level exceeds a predetermined threshold value VP, determination information (determination result) from the flame determination unit 17, and information edited by the editing processing unit 15 (average peak level ) And a return information creating unit 18 that creates the same as the format shown in FIG. 2 (for example, the same signal form) and creates this as return information to the receiver 1. The transmitting means 12 is adapted to return the return information created by the return information creating section 18 to the receiver 1 side.

FIG. 8 shows the spectrum intensity of the flame. As can be seen from FIG. 8, the flame generated during a fire or the like has an infrared wavelength of about 4.3 to 4.4 μm.
It has the largest spectral intensity. Therefore, the infrared detecting means 11 is configured to detect infrared rays having an infrared wavelength peculiar to the flame to be detected, that is, a main feature of the flame, for example, infrared rays having a wavelength of about 4.3 to 4.4 μm. . For example, in the infrared detection means 11,
An infrared sensor that detects infrared rays having a wavelength of about 4.3 to 4.4 μm can be used.

FIG. 9 shows an example of temporal changes in the level of infrared rays radiated from the flame during a fire (the intensity level of the infrared detection signal output from the infrared sensor when the infrared sensor is used as the infrared detecting means 11). FIG. Referring to FIG. 9, the intensity level of infrared rays radiated from the flame at the time of fire often becomes equal to or higher than a predetermined threshold level V _th (for example, 0.2 V).

With this in mind, in the edit processing section 15 of the signal processing means 13, the infrared intensity level (the level of the infrared detection signal from the infrared detection means 11) is a predetermined threshold level V _th (for example 0.2 V). It is determined that there is a possibility of flame when the temperature reaches, and from this point, the level of the infrared detection signal is taken in at a predetermined sampling interval.

Then, the edit processing section 1 of the signal processing means 13
5 indicates that the level of the infrared detection signal is a predetermined threshold level V _th
In order to find out to what extent the infrared detection signal from the time when the temperature reaches the temperature has a characteristic peculiar to the flame at the time of fire, the level of the infrared detection signal is changed from the time when the predetermined threshold level V _th is reached to the predetermined period T. A peak (for example, a peak of the infrared detection signal level exceeding a predetermined threshold level V _th of the infrared detection signal levels over a predetermined period T) is detected, and the average of the levels of the respective peaks over the predetermined period T is averaged. The peak level M _avg is _calculated .

More specifically, as shown in FIG. 9, the infrared detection signal is fetched as data at a predetermined time interval Δt for a predetermined period T from the time when the level of the infrared detection signal exceeds a predetermined threshold level V _th. (Sampled),
Therefore, in the predetermined period T, about T / Δt pieces of data are fetched (sampled), and the edit processing section 15 of the signal processing means 13 may, for example, receive about T / Δt pieces of data ( Infrared detection signal level)
Focusing only on those _exceeding the predetermined threshold level V _th , the increase or decrease in the level of the infrared detection signal _{exceeding the} predetermined threshold level V _th is detected, and the peak portion is detected as the peak of the level. ing. That is, when the level of the infrared detection signal is captured as digital data at predetermined time intervals Δt, for example, in the level data (digital data) of the captured infrared detection signal, infrared detection exceeding a predetermined threshold level V _th Regarding the signal level, it is possible to compare the previous data and the current data, determine whether the tendency is an increasing tendency or a decreasing tendency, and extract the point at which the increase changes to the decreasing point as a peak point.

Then, when the number of level peaks is detected as, for example, m in the predetermined period T, and the levels of the respective peaks are detected as M ₁ , M ₂ , ..., M _m , these M ₁ , M ₂ are detected. , ..., M _m average value _Mavg is obtained as an average peak level.

The average peak level _Mavg thus obtained in the edit processing unit 15 is a very small amount of information.
(The amount of information expressed by about several bits (5 to 7 bits)), and even though the amount of information is very small, the infrared detection signal is peculiar to the flame during a fire. It shows how well the main characteristics are, and if the average peak level _Mavg can be used as the detection signal information B ₂ of the return information, the receiver 1 receives it. In this case, by displaying this on a trend graph, for example, it can be monitored, for example, the tendency of a flame (trend), or the tendency leading to the occurrence of a fire.
(Trend) etc. can be analyzed and the whole situation can be judged.

Specifically, the detection signal information B ₂ of the return information
Infrared 4.
If the average value of the peak level of 3 μm, that is, if the peak level is within 310 mV, for example, when the value is 10 mV / digit, 310 mV is “31”, that is, “11111” in binary display. It can be used as it is as the detection signal information B ₂ . However, in the above example, when the average peak level is 310 mV or higher, it cannot be expressed by 5 bits, so this can be limited to 5 bits (for example,
The maximum value that can be expressed by 5 bits is “11111”), or the result of dividing the measured data of the average peak level by a constant value (for example, “2” or “4”) is processed as the detection signal information B _2. There is a need to. Also, when the number m of peaks per predetermined time T is below a certain value (several times or less / polling), it is considered to be noise, and in this case, the average peak level is a certain value (for example, “2” or “4”).
It is also possible to process by dividing by.

In the sensor 2, the signal processing means 1
When the average peak level _Mavg obtained as a result of being edited as described above by the editing processing unit 15 is equal to or higher than a predetermined threshold value VP (this threshold value VP is the above-mentioned threshold value). If it is set to be sufficiently larger than the threshold level V _th ), it is determined that the flame is present, and the determination result is expressed by 1 bit (when it is “1”, the flame is “0”).
If it is not a flame) and the judgment information B ₁ of the return information is used, the receiver ₁ uses the judgment information (judgment result) B ₁ on the sensor side when the return information is received. Thus, fire notification processing or the like can be performed. That is,
In this case, the receiver 1 does not need the fire determination process, and the fire notification process or the like can be directly performed based on the determination information B ₁ on the sensor side.

As described above, in the infrared flame detector of FIGS. 6 and 7, the return information is the judgment information from the flame judgment unit 17.
(Judgment result) and the average peak level _Mavg of the infrared detection signal from the infrared detection means 11 are summarized in a predetermined format, and therefore, a very small amount of information (for example, an amount of information of about 6 to 8 bits). It has become.
Therefore, the transmission means 12 can transmit the information for return to the receiver 1 within a predetermined time (for example, within 5 seconds) and make the receiver 1 confirm reception.

Although the return information has a very small amount of information as described above, the infrared detection signal from the infrared detection means 11 is the average peak level of the infrared detection signal over a predetermined period T. Since the main feature quantity peculiar to the flame called M _avg is edited and the judgment result on the sensor side is added to this, the return information in such a format is transmitted from the transmission means 12. When returning to the receiver 1, the receiver 1 can directly perform the fire notification process and the like based on the determination result of the detector side without performing the flame determination process and the fire determination process in the receiver 1. can also such as by displaying the average peak level M _avg example as a trend graph, analyzes the trend (trend), etc. up to the occurrence of the flame tends (trend), etc., or flame, the entire It is possible to determine the situation.

From this fact, the flame detector of FIG. 6 can be incorporated into an existing analog type monitoring system even if it is constructed as an infrared type, and various types of analog type monitoring systems as described above can be incorporated. You can enjoy the benefits of. For example, if the receiver 1 has not only the fire monitoring process such as the fire notification process and the fire analysis process as described above, but also the receiver 1 has the automatic test and inspection functions, the automatic test of the receiver 1 is performed. By using the inspection function, the infrared type flame detector can be automatically inspected (for example, automatic periodic inspection) to save labor. Specifically, a high position such as the ceiling of a building (a position where human inspection is difficult)
The flame sensor installed in the can be configured as an analog type sensor, and the flame sensor can be inspected extremely easily.

Also, the amount of information to be returned is very small.
(For example, the amount of information of several bits), the transmission means 12 of the infrared flame detector has a small number of processing bits generally used in analog type sensors and is low in cost. A transmission IC or the like can be used, and even when a low-cost transmission IC or the like generally used in analog type sensors is used for the transmission means 12, the transmission means 12 returns the return information to the receiver 1. When the receiver 1
It does not interfere with the transmission between and. That is,
Even if such a transmission IC is used as the transmission means and the receiver calls the flame detector at a short polling period, the transmission means may return a small amount of information (number of bits). Instead, it is possible to return the return information to the receiver side, which enables the receiver side to reliably perform fire monitoring processing such as fire notification and fire trend analysis.

FIG. 10 shows an infrared type to which the present invention is applied.
It is a figure which shows the structural example of the flame detector of (two wavelength type). In addition,
In the configuration example of FIG. 10, the flame sensor 2 has a configuration corresponding to the sensor of FIG. In this case, with this flame detector,
In the detection means 11 of FIG. 1, an infrared detection means 11a for detecting infrared rays having a wavelength peculiar to the flame and an auxiliary detection means 11b for detecting light having a wavelength different from the infrared wavelength peculiar to the flame to be detected by the infrared detection means 11 are detected. And have been used.

Further, the signal processing means 13 makes a judgment processing for judging whether or not there is a flame based on the infrared detection signal detected by the infrared detection means 11a and the auxiliary detection signal detected by the auxiliary detection means 11b. Along with the function, the transmission means 12
Is transmitted from the receiver 1 and transmits predetermined information based on the infrared detection signal detected by the infrared detection means 11a.
2 so that the amount of information returned from the transmission means 12 to the receiver 1 is small when the information is returned from the transmitter 2 to the receiver 1, and when the information is received by the receiver 1, An edit processing function is provided to perform edit processing on the infrared detection signal detected by the infrared detection means 11a to the extent that analysis of the flame can be performed based on it.

FIG. 11 is a diagram showing a configuration example of the signal processing means 13 of the flame detector of FIG. In the example of FIG. 11, the signal processing unit 13 calculates the average peak level of the infrared detection signal from the infrared detection unit 11a over a predetermined period T as the edited detection signal information, and an edit processing unit 15.
From the auxiliary detection signal from the auxiliary detection means 11b, an auxiliary feature extraction unit 19 for extracting auxiliary features related to flame, an average peak level calculated by the editing processing unit 15, and an auxiliary feature calculated by the auxiliary feature extraction unit 19 are provided. The flame judgment unit 20 for judging whether or not it is a flame, the judgment information from the flame judgment unit 20 (judgment result), and the information edited by the editing processing unit 15 (for example, average peak level) are shown in FIG. In a format such as shown in (for example, in the same signal form),
The transmitting means 12 has the return information creating section 18 that creates this as the information for returning to the receiver 1, and the transmitting means 12 uses the return information created by the returning information creating section 18 on the receiver 1 side. It will be sent back to.

Here, as the infrared detecting means 11a, for example, an infrared sensor for detecting infrared rays having a wavelength of about 4.3 to 4.4 μm can be used.

In addition, the auxiliary detecting means 11b uses infrared rays having a wavelength near the infrared wavelength peculiar to the flame as light having a wavelength different from the infrared wavelength peculiar to the flame (about 4.3 to 4.4 μm).
For example, an infrared sensor that detects infrared rays having a wavelength of about 3.9 μm or 5.1 μm can be used.
That is, at a wavelength of about 3.9 μm or about 5.1 μm, as can be seen from FIG. 8, the spectrum intensity of the flame is small (it becomes a minimum value). Therefore, in this case, the auxiliary detecting means 11b has a wavelength of about 3.9 μm or The infrared level at a wavelength of about 5.1 μm can be detected as an auxiliary detection signal.

Alternatively, the auxiliary detecting means 11b outputs to the auxiliary detecting means 11b the number of ultraviolet rays emitted from the flame (to be exact, a pulse UV sensor for detecting the (number) as an auxiliary detection signal, more specifically, for example, 200 to 260 nm.
UV sensor that detects light in a certain wavelength range (eg UV
Tron) can be used.

Infrared detecting means 1 is added to the auxiliary detecting means 11b.
When an infrared ray having a wavelength near the infrared wavelength detected by 1a is used, the auxiliary feature extracting unit 19 of the signal processing means 13 detects the infrared ray detecting means 11a as shown in FIG. level S ₁ of the auxiliary detecting unit 11b at the peak level of the infrared detection signal is detected auxiliary detection signal, S _2, ..., captures S _m, thus captured auxiliary detection means for the predetermined period T 11
The average value S _avg of the levels S ₁ , S ₂ , ..., S _m of the auxiliary detection signal from b is obtained as the average auxiliary level, and the edit processing unit 1
Average peak level _Mavg from 5 and auxiliary feature extraction unit 19
From the average auxiliary level S _avg (M _avg / S _avg )
Is calculated as an auxiliary feature. In this case, the flame determination unit 20 of the signal processing unit 13 determines, for example, when the average peak level _Mavg is equal to or higher than the predetermined threshold value VP and the ratio ( _Mavg / _Savg ) is close to the nature of the flame. Meanwhile, the average peak level _Mavg is equal to the predetermined threshold value V
Even if it is P or more, for example, when the ratio (M _avg / S _avg ) is different from the nature of the flame, the flame is not determined.

When the auxiliary detecting means 11b detects an ultraviolet ray, that is, when an ultraviolet ray sensor is used, the number of ultraviolet ray discharge pulses generated from the ultraviolet ray sensor per unit time is the intensity of the ultraviolet ray entering it. (Light intensity)
Therefore, the auxiliary feature extraction unit 19 of the signal processing means 13 is used for a predetermined period T from the time when the level of the infrared detection signal exceeds a predetermined threshold level V _th, as shown in FIG. The number UV of the ultraviolet discharge pulses from the detection means 11b is counted. In this case, the flame determination unit 20 of the signal processing unit 13 determines, for example, that the average peak level _Mavg is equal to or higher than a predetermined threshold, and
When the number UV of UV discharge pulses exceeds a predetermined threshold value VQ, it is determined as a flame, and even if the average peak level _Mavg is equal to or more than the predetermined threshold value VP, for example, the number UV of UV discharge pulses is the threshold value VQ. In the following cases (for example, when it is extremely small), it is not judged as a flame.

As described above, in the infrared type (two-wavelength type) flame sensor of FIGS. 10 and 11 in which the auxiliary detecting means 11b is provided, the flame judging section 20 uses the infrared detecting signal from the infrared detecting means 11a. In addition to the editing processing information (average peak level), the feature extraction information (ratio (M _avg / S _avg )) of the auxiliary detection signal from the auxiliary detection means 11b and the number U of ultraviolet discharge pulses.
V) can also be taken into consideration to judge whether or not the flame is present.

Then, the return information creating unit 18 edits the flame judgment result from the flame judging unit 20 and edits it in exactly the same manner as in the infrared type (single wavelength type) flame detector of FIGS. 6 and 7. The editing process information (average peak level) calculated by the processing unit 15 is put together in a format as shown in FIG.
(For example, in the same signal form), this is created as information for returning to the receiver 1 and given to the transmission means 12.

That is, the infrared type (2
In the case of the wavelength type flame detector, the information to be returned is the same as the infrared type (single wavelength type) flame detector of FIGS. ) And the average peak level _Mavg of the infrared detection signal (for example, information of about 5 to 7 bits) are put together in a predetermined format, and therefore, a very small amount of information (for example, 6 to 8).
Since the information amount is about a bit), the transmitting means 12 predetermines this return information, as in the infrared type (single wavelength type) flame detector of FIGS. 6 and 7. It is possible to transmit to the receiver 1 within a predetermined time (for example, within 5 seconds) and make the receiver 1 confirm reception.

Although the return information has a very small amount of information as described above, the infrared detection signal from the infrared detection means 11 is an average peak level of the infrared detection signal over a predetermined period T. Since the main feature quantity peculiar to the flame called M _avg is edited and the judgment result on the sensor side is added to this, the return information in such a format is transmitted from the transmission means 12. When returning to the receiver 1, the receiver 1 can directly perform the fire notification process and the like based on the determination result of the detector side without performing the flame determination process and the fire determination process in the receiver 1. can also due to the average peak level M _avg example trend display, analyzes the trend (trend), etc. up to the occurrence of the flame tends (trend), etc., or flame, to determine the overall status It becomes possible.

From this, even if the flame detector of FIG. 10 is constructed as an infrared type, it can be incorporated into an existing analog type monitoring system, and various types of analog type monitoring systems as described above can be used. You can enjoy the benefits of.

However, in the infrared type (two-wavelength type) flame detector of FIG. 10, the flame judgment process in the flame detector is performed not only by the average peak level _Mavg of the infrared detection signal but also by the auxiliary detecting means 11b. Feature extraction information of auxiliary detection signal (ratio (M
_avg / S _avg ) and the number of UV discharge pulses UV) are also taken into consideration, so the judgment information (judgment result) in the return information is 1-bit information similar to the flame detector of FIG. Even if it is only in quantity, it is more reliable than the flame detector of FIG. 6, and therefore, when this return information is returned from the transmission means 12 to the receiver 1, the receiver 1 Then, it becomes possible to perform fire monitoring processing such as fire notification processing more accurately and reliably based on the return information.

In the infrared flame detector shown in FIGS. 6, 7, 10, and 11, the signal processing means 13 (and further the judging means 14) generates return information (detection signal information). When the polling cycle is constant, the editing processing and the processing for determining whether or not a predetermined event has occurred can be performed in synchronization with the calling (polling) cycle from the receiver 1. Also, when the polling cycle is not constant, the call from the receiver 1
It can be done asynchronously in the (polling) cycle. That is, when the polling period from the receiver 1 is constant, the peak level averaging process of the infrared detection signal and the process for determining whether or not the flame is performed are performed in synchronization with this polling period. It is possible to generate the return information based on the determination result of whether or not and the average peak level _Mavg, and perform the return processing of the return information to the receiver 1 in synchronization with the polling cycle. That is, in this case, the predetermined period T can be managed by the polling cycle without separately managing the predetermined period T by the timer or the like on the sensor side.

When the polling period from the receiver 1 is not constant, for example, the sensor side has a predetermined period T.
For every predetermined period T (for example, 5 seconds), the peak level averaging process of the infrared detection signal and the process for judging whether or not there is a flame are performed. It is possible to generate return information by using M _avg , hold it, and perform return processing such that the held return information is returned to the receiver 1 when there is polling from the receiver 1. it can. In this case, the predetermined period T may not be always constant, but may be variably set according to the signal condition. For example, when the average peak level _Mavg is an ambiguous level close to the predetermined threshold value VP, the predetermined time T can be set long, and when the average peak level _Mavg rapidly rises, the predetermined time T can be set short. . Alternatively, when the level of the auxiliary detection signal does not seem to be a fire, the predetermined time T can be lengthened, and when the level is close to a fire, the predetermined time T can be shortened.

FIG. 14 is a diagram showing a specific example of an infrared type (two-wavelength type) flame sensor when an infrared sensor for detecting infrared rays is used as the auxiliary detecting means 11b.

Referring to FIG. 14, the infrared ray detecting means 11a of the flame detector is an infrared ray peculiar to a flame (generally, an infrared ray in the vicinity of 4.3 μm of CO ₂ resonance radiation (about 4.1 to 4.7).
an infrared sensor 21 for detecting infrared rays in the μm range)),
A voltage amplifier circuit 22 that amplifies an infrared detection signal (voltage) from the infrared sensor 21, a filter circuit 23 that passes only a component of a predetermined frequency band in the infrared detection signal from the infrared sensor 21, and a filter circuit 23. And a DC level conversion circuit 24 that performs DC level conversion on the infrared detection signal that has passed through.

Further, the auxiliary detecting means 11b of this flame detector
Is a wavelength different from the infrared wavelength peculiar to the flame (for example, 3.
An infrared sensor 25 for detecting infrared rays having a wavelength of 9 μm or 5.1 μm) as an auxiliary detection signal, a voltage amplification circuit 26 for amplifying a detection signal from the infrared sensor 25, that is, an auxiliary detection signal (voltage), and an auxiliary detection signal. Of the filter circuit 27 that allows only a component in a predetermined frequency band to pass therethrough.
And a DC level conversion circuit 28 that performs DC level conversion on the auxiliary detection signal that has passed through the filter circuit 27.

Further, the signal processing means 13 of this flame detector
Is a CP such as a microcomputer that controls the whole
U (Central Processing Unit) 30 and DC of infrared detecting means 11a
A comparator 29 that compares the level (output voltage) of the infrared detection signal from the level conversion circuit 24 with the threshold voltage V _th.
And a D / A converter 31 for giving return information to the transmission means 12 in the form of an analog signal.

Here, as the infrared sensors 21 and 25, pyroelectric elements widely used as crime prevention sensors can be used. In this case, the pyroelectric sensor
It generates a differential charge output with respect to the incident light, and therefore outputs a signal proportional to the fluctuation of thermal energy from the flame. Also, in connection with this,
The filter circuits 23 and 27 are designed to pass only the fluctuation frequency (flame flicker frequency) band component as the component of the predetermined frequency band.

That is, the fluctuation of the flame detected by the infrared sensors 21 and 25 is about several Hz to tens of Hz, and the infrared detection signal and the auxiliary detection signal peculiar to the flame are obtained.
In the above example, the infrared detection signals and the auxiliary detection signals from the infrared sensors 21 and 25 are passed through the filter circuits 23 and 27 having the transmission characteristic in this frequency band, and only the fluctuation component of the flame is included in the infrared detection signals and the auxiliary detection signals. Incorporate it into the CPU 30 in a saved form (that is, a flame fluctuation signal captured at about 4.3 to 4.4 μm, a flame fluctuation signal captured at about 3.9 μm or 5.1 μm) It has become.

Further, the CPU 30 has a built-in timer function for measuring, for example, 5 seconds as the predetermined period T. The CPU 30 has a DC level conversion circuit 24,
It has an A / D conversion function for converting the level (intensity level) of the infrared detection signal and auxiliary detection signal from the DC level conversion circuit 28 into a digital signal. The A / D conversion function is adapted to sample the infrared detection signal and the auxiliary detection signal at a predetermined time interval Δt (for example, 10 msec), digitally convert them, and fetch them.

When the level (amplitude voltage) of the infrared detection signal output from the DC level conversion circuit 24 reaches the threshold voltage V _th (for example, 0.2 V), the comparator 29 receives the threshold voltage V _th .
The output signal of “1” is added to the interrupt terminal INT1 of the CPU 30 as an interrupt to the CPU 30, and the CPU 30
When the terminal INT1 has an interrupt input, the A / D conversion operation for the levels of the infrared detection signal and the auxiliary detection signal by the A / D conversion function is started, and the calculation processing (editing processing) for the infrared detection signal is performed. ing.

That is, in order to detect a fire, the CPU 30 sets the level of the infrared detection signal over a predetermined period T at a predetermined time interval (sampling cycle) Δt (for example, 10).
Infrared detection signal level data (digital data) captured as digital data at a time interval of msec) and captured at every time interval Δt (= 10 msec) over a predetermined period T.
Among them, for example, the peak is detected only for the level of the infrared detection signal that exceeds the predetermined threshold level V _th , and the average peak level _Mavg is calculated.

Further, as described above, the infrared detecting means 11a
When the peak of the infrared detection signal from the DC level conversion circuit 24 is detected, the CPU 30 detects D at the time of extraction.
The level of the auxiliary detection signal from the C level conversion circuit 28 is fetched, and the average of the levels of the auxiliary detection signals fetched over the predetermined period T is averaged to calculate the average auxiliary level S _avg . Then, the CPU 30 _causes the ratio M between the average peak level _Mavg and the average auxiliary level _Savg.
avg / S _avg is obtained, and, for example, the average peak level _Mavg
Based on the ratio and the ratio _Mavg / _Savg , it is judged whether or not there is a flame, the judgment result and the average peak level _Mavg are put together in a predetermined format as shown in FIG. It is generated as information for return and given to the D / A converter 31.

The CPU 30 further determines whether or not the infrared detection signal and the auxiliary detection signal exceed the saturation region of the voltage amplification circuits 22 and 26. If the infrared detection signal and the auxiliary detection signal exceed the saturation region, the voltage amplification circuit 22 , 26 is set to 1 / N (for example, 1/2), and the voltage amplifier circuits 22, 26 are also set.
When it is determined that the amplification degree of 1 is required to be returned, a control function of returning the amplification degree to the standard can be provided. With such a control function, the average peak level _Mavg and the average auxiliary level _Savg can be detected more accurately.

As can be seen from the above, in the flame detector of FIG. 10, the signal processing means 13 is realized by the CPU 30 in the concrete configuration example of FIG.

Further, in FIG. 14, the transmission means 12 is a low-cost transmission IC with a small number of processing bits, which is conventionally used in an analog type sensor (for example, serial signal transmission / reception with the receiver 1). A serial transmission IC) 33 is used. This kind of transmission IC33
Is set to a unique address unique to this sensor, and when the address sent by the receiver 1 matches this unique address, the device is called (address polled). In this case, for example, according to the return command from the receiver 1, the D / A converter 3
The return information (analog signal) from 1 is converted into a digital signal by the A / D converter built in the transmission IC 33 and returned to the receiver 1, or, for example, a display command from the receiver 1 In accordance with this, the status judgment information and the like sent from the receiver 1 is displayed on the operation indicator lamp 36, for example.

More specifically, the transmission IC 33 is the receiver 1
When receiving information from the receiver 1 that a fire has occurred at the flame detector at the time of address polling from, the operation indicator lamp 36 is continuously lit, for example, and the flame detector from the receiver 1 is received. When the judgment information indicating that the malfunction has been received, the operation indicator lamp 36 is made to blink, for example. In the present invention,
Since the judgment information indicating that a fire has occurred is generated in the flame detector 2, when the flame detector 2 judges that a fire has occurred without receiving the judgment information from the receiver 1, the flame detector 2
The operation indicator lamp 36 can be continuously turned on, for example, only by the internal processing (that is, without receiving the judgment information from the receiver 1).

Next, the processing operation of the flame detector having the structure shown in FIG. 14, mainly the processing operation of the CPU 30, will be described with reference to the flowcharts of FIGS. In this example, it is assumed that the polling cycle from the receiver 1 is constant, and the predetermined period T is managed by the polling cycle from the receiver 1. Below, for convenience of explanation,
It is assumed that the predetermined period T is set to the same time length as the polling period from the receiver 1. For example, if the polling cycle is
For convenience of explanation, it is assumed that it is 5 seconds, and in this case, the predetermined period T
Is set to 5 seconds.

Referring to FIGS. 15 and 16, first, when the power supply 24 of the fire detection device is turned on, the CPU 30 executes initialization processing (step S1).

Next, it is judged whether there is a call (address polling) from the receiver 1 (step S2), and when there is no call from the receiver 1, the infrared detection signal and the auxiliary detection signal are fetched. That is, it is checked whether the level of the infrared detection signal has reached the threshold voltage V _th and the interrupt input has been input to the terminal INT1 (step S3).
As a result, when there is an interrupt input at the terminal INT1, the CPU 30 causes the sampling cycle Δt (for example, 10
every m seconds), the level of the infrared detection signal from the infrared sensor 1 is taken in, the peak is detected as described above,
Retain the level of each peak. In parallel with this, C
When the peak of the level of the infrared detection signal is detected, the PU 30 takes in the level of the auxiliary detection signal at this time and holds it (step S4).

When the receiving process is repeated and it is determined in step S2 that the receiver 1 has polled, the CPU 30 decodes the command from the receiver 1. That is, whether the command from the receiver 1 is, for example, a command for returning the return information (step S5) or a command for displaying the status determination information or the like from the receiver 1 (step S6), To judge. Here, the display of the status judgment information from the receiver 1 means, for example, a display of a fire judgment result (for example, LED
(Lights up).

As a result, if the instruction is to return the return information, the CPU 30 causes the peak detection level of the infrared detection signal captured and held over the period (for example, 5 seconds) from the previous polling time to the current polling time, Take each average of each level of the auxiliary detection signal,
The average peak level M _avg and the average auxiliary level S _avg are calculated (step S7), and then, for example, it is determined whether or not the flame is based on the ratio M _avg / S _avg and the average peak level M _avg ( step S8), and for example, raised summarized the determination result and the average peak level M _avg into a predetermined format (step S9), and then converted into an analog signal by a D / a converter provided to the transmission IC 33 (step S1
0). As a result, the transmission IC 33 returns the return information to the receiver 1 according to the command from the receiver 1,
Based on this return information, the receiver 1 can perform notification processing, trend analysis processing, or inspection of this flame detector (fault determination, etc.).

Further, when there is a polling from the receiver 1, if the command at this time is judged to be a command to display the status judgment information etc. from the receiver 1 (step S
6) The CPU 30 can display the status determination information and the like (for example, information indicating the occurrence of a fire or the failure of the flame sensor) on the operation indicator lamp 36 by the transmission IC 33 (step S11).

As described above, the infrared flame detector of FIG. 14 can be incorporated into an existing analog type monitoring system. In this case, the infrared flame detector is viewed from the receiver 1 side. Therefore, the control can be performed without any change from the well-known analog type heat detector and smoke detector. That is, the receiver 1 can poll the infrared flame detector, exchange data, etc. without changing the calling format, the data transmission format, etc., from the conventional one, and the receiver 1 side Based on the information for return from the infrared flame detector, fire monitoring processing such as fire notification and fire trend analysis can be performed extremely easily, and the overall situation can be comprehensively judged. In addition, the flame detector can be inspected (fault determination, etc.).

Further, FIG. 17 shows an infrared type in which an ultraviolet sensor for detecting ultraviolet rays is used for the auxiliary detecting means 11b.
It is a figure which shows the specific example of the flame detector of (two wavelength type). FIG.
With reference to, in this flame detector, two interrupt terminals I
A CPU 50 having NT1 and INT2 is used, and
The auxiliary detection means 11b includes the ultraviolet sensor 41 and the CPU 5
High-voltage generating circuit 42 that generates a high-voltage voltage based on a pulse signal (oscillation signal) P0 from 0, and rectifies the high-voltage voltage from the high-voltage generating circuit 42 into a DC high-voltage, and supplies this as a power source for the ultraviolet sensor 41. It is composed of a circuit 43 and a waveform shaping circuit 44 that shapes the discharge pulse signal output from the ultraviolet sensor 41 when detecting ultraviolet light into a pulse waveform and outputs the pulse waveform as an ultraviolet discharge pulse.

Here, in the ultraviolet sensor 41, for example,
A UV tron that is sensitive to UV in the wavelength range of 200 to 260 nm is used. When the UV tron detects UV, it outputs a number of UV discharge pulses according to the intensity (light intensity) of UV. ing.

That is, an ultraviolet discharge pulse is output from the waveform shaping circuit 44, and the interrupt terminal I of the CPU 50 is output.
It is designed to be added to NT2 as an interrupt. In this case, the CPU 50 separates (independently) from the interrupt input from the interrupt terminal INT1 and determines the number of interrupts to the terminal INT2 over a predetermined period T by the ultraviolet discharge pulse. counted as the number UV, based on the number of UV average peak level M _avg and ultraviolet discharge pulses of infrared detection signal,
It is designed to judge whether it is a flame or not.

As described above, the flame detector of FIG. 17 uses the ultraviolet sensor as the auxiliary detecting means 11b to judge whether the flame is present or not and the average peak level _Mavg of the infrared detection signal over the predetermined period T and the ultraviolet discharge pulse. It differs from the flame detector of FIG. 14 only in that it is performed based on the number of UVs, and other processing operations are basically the same as those of the flame detector of FIG. Processing is done.

As described above, the flame detector of FIG. 17 can also be incorporated into an existing analog type monitoring system,
In this case, the flame detector can be controlled without any difference from the well-known analog type heat detector or smoke detector as seen from the receiver 1 side. That is, the receiver 1 can poll the flame detector, exchange data, etc., without changing the calling format or the data transmission format, etc. from the conventional one. Based on the return information from the sensor, fire monitoring processing such as fire notification and fire trend analysis can be performed extremely easily, and the overall situation can be comprehensively judged. In addition, the flame detector can be inspected (fault determination, etc.).

In each of the above configuration examples, when the average peak level _Mavg of the infrared detection signal is obtained, the infrared intensity obtained over the predetermined period T from the time when the level of the infrared detection signal exceeds the predetermined threshold level _Vth. Out of the levels
Focusing only on that exceeds a predetermined threshold level V _th, only by detecting the peak for the level of the infrared detection signal exceeds a predetermined threshold level V _th, and the average peak level M _avg, thereby, noise, etc. However, depending on the case, the level of the infrared detection signal obtained over a predetermined period T from the time when the level of the infrared detection signal exceeds a predetermined threshold level V _th may be reduced. The peaks are detected including those not _{exceeding the} predetermined threshold level V _th , and the average peak level M
It can also be _avg .

Further, in each of the above-mentioned constitutional examples, the auxiliary detecting means 11b has the infrared detecting means 1 as an auxiliary characteristic of the flame.
I decided to detect light (infrared or ultraviolet) with a wavelength different from the infrared ray with a wavelength peculiar to the flame that is the detection target of 1a,
Any other target may be detected as long as it has an auxiliary characteristic of the flame. For example, smoke or heat may be detected.

Further, in each of the above-mentioned configuration examples, the average peak level is used as the detection signal information B ₂ of the return information, but as the detection signal information B ₂ of the return information, the main characteristic quantity peculiar to the flame is used. It is only necessary that the data has been edited to represent, and other than the average peak level can be used.

For example, the level of the infrared detection signal from the infrared detecting means 11 (11a) was confirmed by experiments to have a fluctuation of 3 to 10 Hz peculiar to the fire, and the fluctuation peculiar to the fire was detected. In addition, the number of peaks (peak frequency) at a predetermined time T of the level of the infrared detection signal from the infrared detection means 11 (11a) can be used. The number of peaks (peak frequency) of the level of the infrared detection signal in the predetermined period T can be detected at the same time when the average peak level _Mavg is obtained by the method described in FIG. In the example of FIG. 9, it can be detected as “m”.

As described above, the infrared detecting means 11 (11a)
The number of peaks (peak frequency) of the level of infrared detection signals from the
It is a good reflection of the fluctuation of 10Hz.
When there is no fire, the number of peaks is smaller than when there is a fire. Therefore, the number of peaks at the predetermined time T can be used instead of the average peak level.

That is, it is also possible to return the average peak level _Mavg edited to represent the main characteristic amount peculiar to the flame to the receiver 1 as the detection signal information B ₂ of the return information according to the application. However, for example, since the data of “the number of peaks in the predetermined period T” is also edited to represent the main characteristic amount peculiar to the flame, the “number of peaks in the predetermined period T” is set. Can be returned to the receiver 1 as the detection signal information B ₂ of the return information. Further, it is possible to use information including both the average peak level _Mavg and the number of peaks as the detection signal information B ₂ of the return information.

In any case, in the present invention, the detection signal information B ₂ of the return information is transmitted from the transmission means 12 to the receiver 1.
In order to reduce the amount of information returned to the receiver, and when the receiver 1 receives the information, the receiver 1 monitors the predetermined event based on the information (for example, analysis of the tendency of flame or fire). It is sufficient that the infrared detection signal detected by the infrared detecting means 11 (11a) is edited to the extent that it is possible to perform the above. Among the various examples described above, the one most suitable for the purpose of use or the one other than the above examples can be selected and used.

Further, in the above configuration example, the flame detector 2 is
Based on the average peak level of the infrared detection signal, it is determined whether it is a flame, or the average peak level of the infrared detection signal and the feature extraction information of the auxiliary detection signal (the ratio (M
_Avg / _Savg ) and the number of UV discharge pulses UV) are used to determine whether or not the flame is present. In this determination process, the number of peaks in the predetermined period T may be further considered. it can. For example, the average peak level _Mavg
Is greater than or equal to a predetermined threshold value VP, and the ratio (M _avg / S
_avg) is Properties and near the flame, when the number of peaks is a predetermined range (e.g., about 2~10Hz in terms of frequency), while determining that the flame, the average peak level M _avg is greater than a predetermined threshold value VP Even if, for example, the ratio (M _avg / S
_avg ) is different from the nature of the flame, or the number of peaks is not within the predetermined range, it can be determined not to be a flame. Alternatively, for example, when the average peak level _Mavg is equal to or higher than a predetermined threshold value VP, the number UV of ultraviolet discharge pulses exceeds a predetermined threshold value VQ, and the number of peaks is within a predetermined range, the flame is determined to be flame. On the other hand, even if the average peak level _Mavg is equal to or higher than the predetermined threshold value VP, for example, if the number UV of ultraviolet discharge pulses is extremely small or the number of peaks is not within the predetermined range, it is not judged as a flame. be able to.

Further, in the concrete configuration examples of FIGS. 14 and 17, the transmission IC 33 has an analog input (transmission IC 33
(In which an A / D converter is built in) is used. Therefore, a D / A converter 31 is provided to convert the return information into an analog signal and give it to the transmission IC 33. However, when a digital input is used as the transmission IC 33 (when the transmission IC 33 does not include an A / D converter), it is not necessary to provide the D / A converter 31. That is, the digital outputs from the CPUs 30 and 50 can be directly digitally input to the transmission IC 33.

In the examples of FIGS. 14 and 17, the transmission IC 33 is supposed to return the return information to the receiver 1 in the form of digital data. However, the transmission IC 33 uses the return information as an analog signal to the receiver. It is also possible to use the one returned to 1. In this case, as an interface between the sensor and the receiver 1, for example, the address information from the receiver 1 is received as a digital signal, and the return information is returned to the receiver 1 as an analog signal of the detected current, The receiver 1 side can be configured to capture return information (analog signal) from the sensor side.

Further, in the example of the flowcharts of FIGS. 15 and 16, it is assumed that the polling cycle from the receiver 1 is constant, and in this case, the predetermined period T can be managed by the polling cycle, but Since the polling cycle from the machine 1 is not constant depending on the receiver, in this case, the predetermined period T is managed by, for example, a timer on the sensor side, and, for example, as shown in FIG. It is set to a predetermined period (for example, 5 seconds).
The predetermined time T can be set variably as described above.

Further, the configurations of FIGS. 1 and 4 are not limited to the infrared flame detector, and in determining whether or not a predetermined event (flame in the above example) has occurred, the event is accompanied by the event. Any sensor for which a short-term temporal change of the physical quantity (fluctuation phenomenon in the above example) is important, that is, a large amount of detection is generally performed in order to accurately determine whether or not a predetermined event has occurred. It can be applied to any sensor that requires data (sensors for fire detection, crime prevention detection, etc.), and is particularly useful when configuring these sensors as analog type sensors.

The configuration shown in FIGS. 1 and 4 has the detecting means 11
Not only a sensor that has a large amount of information (the number of detected data) of the detection signal from, but also an ultraviolet type flame detection that does not have a large amount of the information (the number of detected data) of the detection signal from detection means 11. Device (sensor using ultraviolet detecting means for detecting means 11), heat sensor (sensor using temperature detecting means for detecting means 11), smoke detector (sensor using smoke concentration detecting means for detecting means 11) It is similarly applicable to any sensor such as a container). When applied to these sensors, the detection signal from the detection means 11 has a small information amount (information amount of about 5 to 7 bits). Signal processing means 13 of configuration example
In the above, the edit processing function for the detection signal from the detection means 11 does not necessarily have to be provided (of course, even if the detection signal from the detection means 11 has a small amount of information, May be provided with an editing processing function).

FIG. 19 and FIG. 20 are views showing another structural example of the sensor according to the present invention. 19 and 20 correspond to FIGS. 1 and 4, respectively. In the example of FIG. 19, the sensor 2 includes a detection unit 11 that detects a predetermined physical quantity, a signal processing unit 13 that performs predetermined signal processing on the detection signal detected by the detection unit 11, and a receiver 1. And a transmission means 12 for returning predetermined information to the receiver 1 when called from the receiver 1 (for example, address polling). Here, the signal processing means 13 is provided. Has a judgment function for judging whether or not a predetermined event has occurred (for example, whether or not a flame or a fire has occurred) based on the detection signal from the detection means 11, and Judgment information on whether it has occurred
The (determination result) and the detection signal itself detected by the detection means 11 are provided to the transmission means 12.

Further, the transmitting means 12 determines the judgment information (judgment result) in this sensor as to whether or not a predetermined event (for example, fire) has occurred when the receiver 1 is called (for example, when address polling is performed). ) And the detection signal itself detected by the detection means 11 are arranged in a predetermined format as shown in FIG. 2 and returned to the receiver 1 as return information.

In such a configuration, the signal processing means 13 of the sensor 2 detects the detection signal from the detection means 11 (in the case of an ultraviolet flame detector, the number of ultraviolet discharge pulses UV at a predetermined time T, the heat sensor). In the case of, the temperature signal level integrated value detected in a form integrated over a predetermined time T, and in the case of a smoke sensor, based on the smoke concentration signal level integrated value detected in a form integrated over a predetermined time T) Whether or not a predetermined event (for example, fire) has occurred is judged, and the judgment information (judgment result, for example, 1-bit information) and the detection signal itself (for example, 5 to 7-bit information) from the detecting means 11 are determined. Both are given to the transmission means 12, and the transmission means 12 uses the information in which the judgment information and the detection signal itself from the detection means 11 are put together in a predetermined format as shown in FIG. , It can be returned to the receiver 1.

In other words, the configuration example of FIG. 19 is premised on the case where the detection signal from the detection means 11 has a sufficiently small information amount (information amount of about 5 to 7 bits). The signal processing means 13 does not perform edit processing on the detection signal from the detection means 11 and detects the detection means 11
The detection signal itself from the detection signal information B of the information for return
₂ can be given to the transmission means 12.

In this case, as shown in FIG. 21 (a), the signal processing means 13 determines that the judgment information (judgment result, for example, 1-bit information) B ₁ indicating whether or not a predetermined event has occurred. The detection signal itself from the detection means 11 having a small amount of information (for example, information of 5 to 7 bits)
B ₂ and B ₂ may be separately provided to the transmission means 12, or, as shown in FIG. 21B, judgment information (judgment result, for example, 1-bit information) as to whether or not a predetermined event has occurred. ) B ₁ and the detection signal itself (for example, 5-bit to 7-bit information) B ₂ from the detection means 11 which has already a small amount of information are combined into one information (for example, the format shown in FIG. 2). Together), transmission means 1
May be given to 2.

Further, in the sensor of the example of FIG. 20, it is judged whether or not a predetermined event has occurred based on the detection signal detected by the detection means 11 (for example, judgment as to whether or not a fire has occurred). The determination means 14 for performing the above is provided separately from the signal processing means 13. In this case, the signal processing means 13 does not have a determination processing function, and the detection signal itself detected by the detection means 11 is transmitted to the transmission means 12. It has only the function to give to. Therefore, in this case, the signal processing means 13 does not necessarily have to be provided, and the detection signal from the detection means 11 can be directly applied to the transmission means 12.

In FIG. 20, the signal processing means 13
22A, the determination means 14 and the signal processing means 13 determine whether or not a predetermined event has occurred (determination result, for example, 1-bit information, as shown in FIG. 22A). ) And the detection signal itself (for example, an information amount of about 5 bits to 7 bits) from the detection means 11 which already has a small amount of information may be separately given to the transmission means 12, or As shown in 22 (b),
Judgment information (judgment result, for example, 1-bit information) as to whether or not a predetermined event has occurred, and the detection signal itself from the detection means 11 having a small amount of information (for example, about 5 bits to 7 bits). (The amount of information) is collected in a predetermined format in, for example, the signal processing unit 13 (for example, edited into a format as shown in FIG. 2),
It may be given to the transmission means 12.

Further, in the sensor 2 as shown in FIGS. 19 and 20, the signal processing means 13 (further, the judging means 1)
The process of generating the return information in 4) (including the process of transferring the detection signal and the process of determining whether or not a predetermined event has occurred) is the same as in the case of the sensor 2 shown in FIGS. 1 and 4. Similarly, when the polling cycle is constant, it can be performed in synchronization with the cycle of calling (polling) from the receiver 1, and when the polling cycle is not constant, calling (polling) from the receiver 1 is performed. ) Can be performed asynchronously.

That is, also in the sensor 2 shown in FIGS. 19 and 20, the judging means 14 (and further the signal processing means 1).
3), when the polling cycle is constant, performs the above-described return information generation processing in synchronization with the call from the receiver 1 for a predetermined period T, and the transmission means 12
Can return the generated return information to the receiver 1 in synchronization with the call from the receiver 1. on the other hand,
When the polling cycle is not constant, for example, the sensor side starts its own timer for measuring the predetermined period T,
The return information is generated (that is, the judging means 1
4 (further, the signal processing means 13) performs the above-described generation processing of return information every predetermined period T), holds the generated return information, and the transmission means 12 receives from the receiver 1. When called, the returned return information can be returned to the receiver 1.

FIG. 23 is a diagram showing a structural example of an ultraviolet flame detector to which the present invention is applied. Note that in the configuration example of FIG. 23, the flame detector has a configuration corresponding to FIG. 19. In this case, in this flame detector, the detecting means 11 of FIG.
An ultraviolet ray detecting means (for example, an ultraviolet ray sensor such as a UV tron) 11 for detecting an ultraviolet ray having a wavelength peculiar to the flame is used, and the signal processing means 13 has a predetermined period T from the ultraviolet ray detecting means 11. A determination processing function is provided to determine whether or not the flame is based on the number UV of the ultraviolet discharge pulses over the range. More specifically, for example, the signal processing unit 13 is configured to determine that the flame is present when the number UV of UV discharge pulses over a predetermined period T exceeds a predetermined threshold value VQ, and the determination result is the determination information B. ₁ and the number UV of ultraviolet discharge pulses from the detecting means 11 over the predetermined period T as the detection signal information B ₂ , the judgment information B ₁ and the detection signal information B ₂ are determined as shown in FIG. In the format of the same signal form,
It is adapted to be given to the transmission means 12. In this case, from the transmission means 12, the information in which the judgment information (judgment result) B ₁ and the detection signal information (the number UV of ultraviolet discharge pulses UV) B ₂ are put together in a predetermined format is used as the return information and is received by the receiver. It is returned to the 1st side.

FIG. 23 shows an example of the configuration of an ultraviolet flame detector. However, also for smoke detectors and heat detectors, the smoke concentration detecting means (detection signal is integrated over a predetermined time T) in the detecting means 11. Output the smoke concentration signal level integrated value detected in a fixed form) or temperature detection means (detection signal for a predetermined time T
23. By using the temperature signal level integrated value detected in the form of being integrated over a period of time, the configuration can be made exactly the same as in FIG. 23, and the return information can be returned to the receiver in the same format as above. You can

As described above, the detector does not have a large amount of information (the number of detection data) of the detection signal from the detecting means 11, for example, the above-mentioned ultraviolet flame detector, heat detector or smoke detector. By applying the present invention to a sensor that can be configured as a conventional analog sensor such as a vessel,
The monitoring process on the receiver 1 side can be made extremely easy as compared with the conventional case. Specifically, in the receiver 1, for example, based on the judgment information B ₁ of the return information from the sensor 2 (for example, the return information in the format shown in FIG. 2), a notification process (alarm process), etc. Can be done directly. That is, by sending judgment information from the sensor 2 side, a predetermined event (for example, fire) occurs on the receiver 1 side.
The process for determining whether or not has occurred is unnecessary, and the notification process (alarm process) or the like can be directly performed based on the determination information from the sensor 2 side. On the receiver 1 side, based on the detection signal itself B ₂ from the detection means 11 in the return information from the sensor ₂ , for example, a situation regarding a predetermined event (for example, fire), for example, a trend ( (Trend) can be analyzed. Specifically, for example, on the receiver 1 side, when the judgment information B ₁ on the sensor side is “abnormal (bit is“ 1 ”)”, an alarm can be issued. Further, the detection signal itself B ₂ from the detection means 11 of the sensor ₂ can be displayed as, for example, a trend graph. In this case, the operator of the receiver 1 can comprehensively judge and analyze the situation by looking at the trend graph when the alarm sounds based on the judgment information B ₁ on the sensor side. Furthermore, it is possible to analyze a process (trend) until a predetermined event (for example, fire) occurs by using a trend graph. As described above, according to the present invention, on the receiver 1 side, in the case of monitoring the predetermined event based on the return information from the sensor 2, it is possible to perform the determination process of whether or not the predetermined event has occurred. Since the receiver 1 does not have to perform it independently, the monitoring process becomes easier than in the conventional case.

In the above example, it is assumed that the receiver 1 side does not perform the process of determining whether or not a predetermined event has occurred, but the receiver 1 side returns the sensor 2 if necessary. It is also possible to independently perform the determination process based on the detection signal information B ₂ of the usage information. In this case, for example, the information B ₁ of the judgment result on the sensor side included in the same return information from the sensor 2 is further added to the judgment result unique to the receiver 1 side, Whether or not a predetermined event (for example, fire) has occurred can be comprehensively judged, and reliability can be improved.

FIG. 24 is a diagram showing a configuration example of the analog type monitoring system according to the present invention. This analog type monitoring system is similar to the analog type monitoring system shown in FIG.
-N are connected, and each of the sensors 2-1 to 2-n is connected to the receiver 1
Is called via the transmission line 3 (address polling), the predetermined information from each of the sensors 2-1 to 2-n is returned to the receiver 1 via the transmission line 3. ing.

Here, each sensor 2-1, 2-2, 2-
3, ..., 2-n are, for example, infrared flame detectors 2-1 having the configuration shown in FIG. 1 or 4, smoke detectors 2-2 having the configuration shown in FIG. .., and the infrared flame detector 2-n having the configuration shown in FIG. 1 or 4 can be used. When the respective sensors 2-1, 2-2, 2-3, ..., 2-n are those to which the present invention is applied, the respective sensors 2-
1, 2-2, 2-3, ..., 2-n can return the return information in the format as shown in FIG. 2 to the receiver 1 when the receiver 1 calls (address polling). it can. Specifically, a format as shown in FIG. 25 can be used as the format of the return information. That is, FIG.
In the format of 5, the sensor type information is 2-bit information A ₁ (“00” ... smoke detector, “01” ... heat detector, “1”
0 "... infrared flame detector," 11 "... other detector), and the judgment information B ₁ is 1-bit information B
₁ is a ( "1" ... event occurrence, "0" ... normal), the detection signal information B ₂ is configured as a 5-bit information.

FIG. 26 shows the receiver 1 and the respective sensors 2-1, 2-2, 2-3, ..., In the system configuration example of FIG.
It is a figure which shows an example of the transmission procedure between 2-n. FIG.
Referring to, the receiver ₁ sends the address AD ₁ of the sensor 2-1 to the transmission line 3. Each sensor 2-1, 2-2,
2-3, ..., 2-n check whether the address AD ₁ sent from the receiver 1 matches its own address.
In this case, it matches the address of the sensor 2-1.
The detector (infrared flame detector) 2-1 returns the return information in the format of FIG. 25 to the receiver 1. For example, at the time of this polling, when it is determined that no flame (fire) has occurred in the sensor 2-1, the sensor 2-1 is
Information for return as shown in FIG. 27A is returned to the receiver 1.
The receiver 1 sends the address AD ₂ of the sensor 2-2 to the transmission line 3 after receiving the return information from the sensor 2-1. As a result, the detector (smoke detector) 2-2 returns the return information in the format of FIG. 25 to the receiver 1. For example, when it is determined that smoke (fire) is occurring in the sensor 2-2 during this polling, this sensor 2-
2 returns the return information as shown in FIG. 27B to the receiver 1. After receiving the return information from the sensor 2-2, the receiver 1 sends the address AD ₃ of the sensor 2-3 to the transmission line 3. As a result, the sensor (heat sensor) 2-3 returns the return information in the format of FIG. 25 to the receiver 1. For example, when it is determined that a high temperature (fire) has occurred in the sensor 2-3 at the time of this polling, the sensor 2-3 receives the return information as shown in FIG. Return to. In this way, the sensors 2-1 to 2-
n is sequentially and cyclically called (polled), and the receiver 1 can perform monitoring processing such as fire notification and fire analysis based on the return information from each of the sensors 2-1 to 2-n. it can.

In the above example, each sensor 2-1 to 2-n is used.
However, in the analog type monitoring system of FIG. 24, the conventional analog type sensor and the analog type sensor to which the present invention is applied can be mixed. For example, an infrared flame sensor to which the present invention is applied or a smoke sensor to which the present invention is applied is used as the sensor 2-1 and a conventional analog type sensor (for example, a smoke sensor, etc.) is used as the sensor 2-2. ) Can also be used.

In the conventional analog type sensor, the information as shown in FIG. 28 is used as the return information. As is apparent from comparison of FIG. 28 with FIG. Information to be returned from the instrument is signal information A ₁
Is the detection signal information B _2, and the content of the signal information A ₁ is different from the return information from the sensor of the present invention. Therefore, in the analog-type monitoring system of FIG. 22, when the conventional analog-type sensor and the analog-type sensor to which the present invention is applied are mixed, the receiver 1 side has the sensors 2-1 to 2-n. Which sensor is an analog type sensor to which the present invention is applied and which sensor is a conventional analog type sensor is managed by, for example, a table, and the receiver 1 is an analog type sensor to which the present invention is applied. When the return information from the type sensor is received, for example, the most significant bit of the signal information (for example, 8-bit information) A ₁ of the return information is the determination information B ₁ , and the remaining 7 bits are the detection signal. While assuming that it is the information B ₂ , a predetermined process is performed, and when the return information from the conventional analog type sensor is received, all the signal information (for example, 8-bit information) A ₁ of the return information is received. Inspection Is regarded as the signal information B _2, it is necessary to perform a predetermined process.

In each of the above configuration examples, the sensor 2 has a configuration intended to be used in an analog type monitoring system (although it is configured as an analog type sensor). 2 itself has a judgment function to judge whether or not a predetermined event (such as flame or fire) has occurred. Therefore, depending on the judgment result, the continuity between the pair of lines extending from the P-type receiver If a switching function for turning on / off the switch is further provided, the sensor 2 can be configured as an on / off type sensor and can also be used in the P type monitoring system as shown in FIG.

29, 30, 31, and 32, the sensor 2 shown in FIGS. 1, 4, 19, and 20 is used not only as an analog type sensor but also as an on / off type sensor. Is also configured and connected to the P-type receiver 4 to be used in the P-type monitoring system. That is,
Each sensor 2 in FIGS. 29, 30, 31, and 32 has P
Information for determining whether or not a predetermined event has occurred in the conduction between the pair of lines 8a and 8b extending from the receiver 4 (determination result)
Further, switching means 9 for turning on / off according to the above is further provided. As a result, FIG. 29, FIG. 30, FIG.
If the transmission means 12 of each sensor 2 in FIG. 32 is connected to the transmission line 3 extending from the analog receiver 1, each sensor can be used in an analog type monitoring system as described above. By connecting the switching means 9 of each sensor 2 in FIGS. 29, 30, 31, and 32 to the pair of lines 8a and 8b from the P-type receiver 4, each sensor 2 is used in the P-type monitoring system. be able to.

[0132]

As described above, according to the inventions of claims 1 to 5, the detection means for detecting a predetermined physical quantity and the detection signal of the physical quantity detected by the detection means are used. The signal processing means for performing a predetermined signal processing, and a transmission means configured to be callable from the receiver and returning predetermined information to the receiver when called from the receiver, the signal processing means, A predetermined processing based on the detection signal detected by the detection means when the transmission means is called from the receiver with a determination processing function of determining whether or not a predetermined event has occurred based on the detection signal detected by the detection means. So that the amount of information returned from the transmission means to the receiver becomes a small amount of information when the information of the above is returned from the transmission means to the receiver, and when the information is received by the receiver, based on the information at the receiver To a certain event It has an edit processing function of performing edit processing on the detection signal detected by the detection means to such an extent that it can be monitored, and a small amount of information is provided together with the judgment information as to whether or not a predetermined event has occurred. The edited detection signal information is given to the transmission means, and the transmission means returns the information in which the judgment information and the edited detection signal information are put together in a predetermined format to the receiver as return information. Therefore, based on the return information from the sensor, the receiver side can perform the monitoring process for a predetermined event more easily or more reliably than before. Further, if the inventions according to claims 1 to 5 are applied, in determining whether or not a predetermined event has occurred, a short-term temporal change of a physical quantity associated with the event is important. A sensor for detecting a physical quantity such as, for example, an infrared flame sensor can also be configured as an analog sensor and can be used in an existing analog monitoring system.

According to the invention of claims 6 to 10, a detection means for detecting a predetermined physical quantity and a signal for performing predetermined signal processing on the detection signal of the physical quantity detected by the detection means. The signal processing means includes a processing means and a transmission means configured to be callable from the receiver and returning predetermined information to the receiver when called from the receiver.
It has a judgment processing function for judging whether or not a predetermined event has occurred based on the detection signal detected by the detection means, and the detection information from the detection means together with the judgment information as to whether or not the predetermined event has occurred. Since the signal information is given to the transmission means, and the transmission means returns the information in which the judgment information and the detection signal information are put together in a predetermined format to the receiver as the return information, this detection Based on the return information from the receiver, the receiver side can perform monitoring processing regarding a predetermined event more easily or more reliably than in the conventional case.

According to the invention described in claim 11, in the sensor described in any one of claims 1 to 10, the sensor further comprises a pair of lines extending from the P-type receiver. The sensor is provided with switching means for controlling on / off of conduction between a pair of lines extending from the P-type receiver on the basis of judgment information as to whether a predetermined event has occurred. Further provided, the sensor can be used as an analog type sensor for returning information for return from the transmission means to the receiver by calling from the receiver, and from the P type receiver. When connected between a pair of extending lines, it is configured to be usable as an on / off type sensor that controls on / off of the conduction between the pair of lines based on the determination information, and thus is used as an analog type sensor. Not only can use, it can also be used as an on-off type sensor.

According to the twelfth and thirteenth aspects of the present invention, an analog type sensor is called from the receiver side, and the called analog type sensor is a predetermined one detected by the analog type sensor. In an analog type monitoring system of a type in which information is sent back to a receiver side and a receiver side monitors for a predetermined event, the analog type sensor is provided with any one of claims 1 to 11. It is possible to use the described sensor, in which case when the sensor is called from the receiver, the judgment information on the sensor side and the detection signal information are put together in a predetermined format. Since the information is returned to the receiver as return information, the receiver side can perform monitoring processing for a predetermined event more easily or more reliably than before, based on the return information from this sensor. It can be.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a sensor according to the present invention.

FIG. 2 is a diagram showing an example of return information.

FIG. 3 is a diagram showing a configuration example of signal processing means of the sensor of FIG.

FIG. 4 is a diagram showing a modification of the sensor of FIG.

5 is a diagram showing a configuration example of signal processing means of the sensor of FIG.

FIG. 6 is a diagram showing a configuration example of an infrared flame detector according to the present invention.

7 is a diagram showing a configuration example of signal processing means of the flame detector of FIG.

FIG. 8 is a diagram showing a spectrum intensity of a flame.

FIG. 9 is a diagram showing an example of temporal changes in the intensity level of infrared rays radiated from a flame during a fire.

FIG. 10 is a diagram showing a configuration example of an infrared (two-wavelength) flame detector to which the present invention is applied.

11 is a diagram showing a configuration example of signal processing means of the flame detector of FIG.

FIG. 12 is a diagram for explaining acquisition of an auxiliary detection signal from the auxiliary detection means when the auxiliary detection means detects infrared rays.

FIG. 13 is a diagram for explaining acquisition of an auxiliary detection signal from the auxiliary detection means when the auxiliary detection means detects ultraviolet rays.

FIG. 14 is a diagram showing a specific example of a flame detector when an infrared sensor is used as an auxiliary detecting means.

15 is a flowchart showing an example of processing operation of the flame detector of FIG.

16 is a flowchart showing an example of processing operation of the flame detector of FIG.

FIG. 17 is a diagram showing a specific example of a flame detector when an ultraviolet sensor is used as auxiliary detection means.

FIG. 18 is a diagram for explaining a relationship between a polling cycle and a predetermined time T.

FIG. 19 is a diagram showing another configuration example of the sensor according to the present invention.

FIG. 20 is a diagram showing another configuration example of the sensor according to the present invention.

21 is a diagram showing a configuration example of signal processing means of the sensor of FIG.

22 is a diagram showing a configuration example of signal processing means of the sensor of FIG. 20. FIG.

FIG. 23 is a diagram showing a configuration example of an ultraviolet flame detector to which the present invention is applied.

FIG. 24 is a diagram showing a configuration example of an analog type monitoring system according to the present invention.

FIG. 25 is a diagram showing an example of return information.

FIG. 26 is a diagram showing an example of a transmission procedure between a receiver and each sensor in the system of FIG. 24.

FIG. 27 is a diagram showing an example of return information from each sensor in the transmission procedure of FIG. 26.

FIG. 28 is a diagram showing an example of return information output from a conventional analog sensor.

FIG. 29 is a diagram showing another configuration example of the sensor according to the present invention.

FIG. 30 is a diagram showing another configuration example of the sensor according to the present invention.

FIG. 31 is a diagram showing another configuration example of the sensor according to the present invention.

FIG. 32 is a diagram showing another configuration example of the sensor according to the present invention.

FIG. 33 is a diagram showing a general configuration example of a P-type fire monitoring system.

FIG. 34 is a diagram illustrating a general configuration example of an analog fire monitoring system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 receiver 2 sensor 3 transmission line 4 P type receiver 8a, 8b pair of lines 9 switching means 11 detecting means 12 transmitting means 13 signal processing means 14 judging means 15 editing processing section 17, 20 flame judging section 18 return information Creation unit 19 Auxiliary feature extraction unit

Claims (13)

[Claims] 1. A detection means for detecting a predetermined physical quantity, a signal processing means for performing predetermined signal processing on a detection signal of the physical quantity detected by the detection means, and a receiver which can be called by a receiver. Transmission means for returning predetermined information to the receiver when called from the machine, and the signal processing means determines whether or not a predetermined event has occurred based on the detection signal detected by the detection means. Returning from the transmitting means to the receiver when the transmitting means returns the predetermined information based on the detection signal detected by the detecting means by the transmitting means, together with the determination processing function for determining The detection signal detected by the detection means is set so that the information amount is small and the receiver can monitor a predetermined event based on the information when the information is received by the receiver. And a detection signal information edited to a small amount of information to the transmission means together with the judgment information as to whether or not a predetermined event has occurred. A sensor characterized in that the judgment information and the edited detection signal information are put together in a predetermined format and returned to a receiver as return information. 2. A detection means for detecting a predetermined physical quantity, a judgment means for judging whether or not a predetermined event has occurred based on a detection signal detected by the detection means, and a detection means for detecting the predetermined event. It has a signal processing means for performing a predetermined signal processing on a detection signal of a physical quantity, and a transmission means configured to be callable from a receiver and returning predetermined information to the receiver when called by the receiver. The signal processing means returns information from the transmitting means to the receiver when the transmitting means returns predetermined information based on the detection signal detected by the detecting means by the receiving means to the transmitting means. The detection signal detected by the detection means is set so that the amount of information is small and the receiver can monitor a predetermined event based on the information when the information is received by the receiver. To The transmission means is provided with the judgment information from the judgment means and the detection signal information from the signal processing means that has been edited to a small amount of information. Is the information in which the determination information and the detection signal information that has been edited are put together in a predetermined format, as return information,
A sensor characterized by being adapted to be returned to a receiver. 3. The sensor according to claim 1 or 2, wherein the signal processing means and / or the judging means, when the cycle of the call from the receiver is constant,
The editing process and the determining process are performed in synchronization with the cycle of calling from the receiver, and the transmitting unit receives information in which the determination information and the detection signal information subjected to the editing process are put together in a predetermined format. In sync with the call from
A detector characterized by being returned to a receiver. 4. The sensor according to claim 1 or 2, wherein the signal processing means and / or the determining means are arranged for every predetermined period when the cycle of the call from the receiver is not constant. The edit processing and the judgment processing are performed to hold the judgment information and the edited detection signal information, and the transmission means stores the judgment information and the edited detection signal information in a predetermined format. A sensor characterized in that when the receiver summons the information summarized in (1), it returns to the receiver. 5. The sensor according to claim 1, wherein the determination information and the edited detection signal information are combined into a predetermined format in a signal processing means. Alternatively, the sensor is characterized in that it is put together in a predetermined format in the transmission means. 6. A detection means for detecting a predetermined physical quantity, a signal processing means for performing a predetermined signal processing on a detection signal of the physical quantity detected by the detection means, and a receiver which can be called up and received. Transmission means for returning predetermined information to the receiver when called from the machine, and the signal processing means determines whether or not a predetermined event has occurred based on the detection signal detected by the detection means. And a detection processing function for determining whether a predetermined event has occurred or not, and the detection signal information from the detection means is given to the transmission means together with the judgment information, and the transmission means receives the judgment information and the detection signal information. A sensor which is configured to return information collected in a predetermined format as return information to a receiver. 7. A detecting means for detecting a predetermined physical quantity, a judging means for judging whether or not a predetermined event has occurred based on a detection signal detected by the detecting means, and a receiver which can be called. And transmitting means for returning predetermined information to the receiver when called from the receiver, to the transmitting means, the detection signal information from the detecting means is given together with the judgment information from the judging means. The sensor is characterized in that the transmission means is configured to return information, in which the judgment information and the detection signal information are put together in a predetermined format, as return information to the receiver. 8. The sensor according to claim 6 or 7, wherein the signal processing means or the judging means determines the cycle of the call from the receiver when the cycle of the call from the receiver is constant. The determination means is synchronized with each other, and the transmission means returns the information in which the determination information and the detection signal information from the detection means are put together in a predetermined format to the receiver in synchronization with the call from the receiver. A sensor characterized by: 9. The sensor according to claim 6 or 7, wherein the signal processing means or the determination means performs determination processing for each predetermined period when the calling cycle from the receiver is not constant. And holding the judgment information and the detection signal from the detection means, and the transmission means outputs information in which the held judgment information and detection signal information are put together in a predetermined format from the receiver. A detector characterized by returning to the receiver when called. 10. The sensor according to claim 6, wherein the determination information and the detection signal information are put together in a predetermined format in a signal processing means, or A sensor characterized by being assembled into a predetermined format in a transmission means. 11. The sensor according to claim 1, wherein the sensor is further configured to be connectable between a pair of lines extending from the P-type receiver,
The sensor is further provided with switching means for controlling on / off of conduction between a pair of lines extending from the P-type receiver based on the judgment information as to whether or not a predetermined event has occurred. An analog sensor for returning information for return from the transmission means to the receiver by a call from the receiver when the transmission means and the receiver are connected via a predetermined transmission path. As an on / off type sensor that controls on / off of conduction between the pair of lines based on the determination information when connected between the pair of lines extending from the P-type receiver. A sensor characterized by being configured for use. 12. The analog side sensor is called from the receiver side, and the called analog type sensor returns the predetermined information detected by the analog type sensor to the receiver side, and the predetermined side is determined by the receiver side. In a type of analog type monitoring system for monitoring the above event, it is possible to use the sensor according to any one of claims 1 to 11 as the analog type sensor. In this case, when the sensor is called from the receiver, it is possible to return the information in which the judgment information on the sensor side and the detection signal information are put together in a predetermined format to the receiver as return information. A characteristic analog type monitoring system. 13. When the analog type sensor is called from the receiver side, the called analog type sensor returns the information detected by the analog type sensor to the receiver side, and the receiver side In an abnormality monitoring method for monitoring abnormality, the sensor according to any one of claims 1 to 11 is used as the analog type sensor, and in this case, the sensor is from a receiver. An abnormality monitoring method characterized in that, when called, information in which judgment information on the sensor side and detection signal information are put together in a predetermined format is returned to a receiver as return information.