JP3377876B2 - Terminal equipment in fire alarm equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device in a fire alarm facility.

[0002]

2. Description of the Related Art Terminal equipment in conventional fire alarm equipment,
For example, in the case of a fire detector, its own address is set in advance on the dip switch before turning on the power at the time of installation, and when the fire detector is turned on after the power is turned on, the self address set on the dip switch is set. Is read and stored in the RAM for address. Then, after that, the self address stored in the RAM is read, the read self address is compared with the address in the signal received from the fire receiver, and if both addresses match, the address is stored. When performing the operation according to the subsequent instruction or transmitting to the fire receiver, the self address is also transmitted. This address allows the fire receiver to identify the fire detector from which the received signal was sent.

[0003]

By the way, when the power of the fire detector as described above is turned on and the preset own address is read from the dip switch, the power supply voltage may not be stable at the beginning of the power supply. In this case, there is a problem that an address different from the set self address may be read. Further, when the self address is read from the DIP switch, if there is noise on the signal line, there is a problem that the wrong address is read. Further, such a problem is likely to occur even when the position of the contact of the DIP switch is halfway.

Further, the above problem occurs not only when the address is read but also when the information such as the ID indicating the type of the terminal device is read from the switch.

According to the present invention, when the information such as the self-address set in the DIP switch or the like is read, even if the power supply voltage of the terminal device such as the fire detector is not stable at the time of starting it, It is an object of the present invention to provide a terminal device in a fire alarm facility that does not accidentally read other information as self-information even if there is some noise.

[0006]

According to the first and second aspects of the present invention, an address or the like is read a plurality of times from a switch to which the address or the like is set, and each time the address or the like is read, the read address or the like A memory for storing
Address comparing means for comparing the address read at the nth time (n is an integer of 1 or more) and the address read at the n + 1th time, and the address read at the nth time and the n + 1
If the address read the second time is the same, n
It has means for recognizing the address and the like read the second time as a legitimate address and the like.

According to the third and fourth aspects of the invention, not only the address read at the n-th time and the address read at the (n + 1) th time, but also the address read at the (n + 2) th time and thereafter are compared, and all of these addresses are compared. Etc. are the same, the address and the like read n times are recognized as a legitimate address and the like.

[0008]

According to the present invention, the address or the like is read a plurality of times from the switch to which the address or the like is set, and every time the address or the like is read, a memory for storing the read address or the like and an address or the like read n times are read. When the address etc. read in the nth time and the address etc. read in the (n + 1) th time are the same, the address comparison means for comparing the address etc. read in the (n + 1) th time with the address etc. Since it has a means for recognizing the address of the fire detector, etc., when reading the self-address etc. set on the DIP switch, etc., even if the power voltage of the fire detector is not stable at the time of starting it, there is noise on the signal line. Even if there is some, there is no accidentally reading another address or the like as the self-address or the like. Then, when the reading is not stable, such as when the setting of the switch is halfway, it is possible to determine that the transmission is abnormal.

Further, when the n-th address and the n + 1-th address are the same, the self-address and the like can be read more reliably by making a comparison in the same manner as the address read after the n + 2-th address.

[0010]

1 is a circuit diagram showing a photoelectric fire detector 1 according to an embodiment of the present invention.

In this embodiment, a microcomputer (microcomputer) 10 controls the entire photoelectric fire detector 1, and a ROM 20 stores the program of the flowchart shown in FIG. The address setting DIP switch 30 is a switch for setting the self-address of the photoelectric fire detector 1.

The RAM 21 is a memory for storing the address read from the address setting DIP switch 30.

The light emitting circuit 40 supplies a current pulse for light emission to the light emitting element 41 when receiving a light emission control pulse from the microcomputer 10, and the amplifier circuit 43 amplifies the output level of the light receiving element 42 to a predetermined level. It is amplified at a rate.

The transmitter / receiver circuit 50 receives from the microcomputer 10 a signal such as a smoke density physical quantity signal, a fire signal, and an abnormal signal from a microcomputer 10 and a signal such as a polling call signal from the receiver. Microcomputer 10
And a receiving circuit for sending to. The constant voltage circuit 60 is a circuit that supplies a stabilized constant voltage to the microcomputer 10.

The RAM 21 is an example of a memory which reads the set address from a switch to which the address is set a plurality of times and stores the read address each time the address is read.

Further, the microcomputer 10 and the ROM 20 have n
Address and n + read at the second time (n is an integer of 1 or more)
It is an example of an address comparing means for comparing the address read at the first time, and when the address read at the nth time and the address read at the (n + 1) th time are the same, the address read at the nth time is normalized. It is also an example of a means for recognizing the address.

FIG. 2 is a circuit diagram showing a detailed example of the address setting DIP switch 30 used in the fire detector 1 of the above embodiment.

The dip switch 30 has eight switches S.
1 to S8, one terminal of each of the switches S1 to S8 is connected to each of the eight input ports P1 to P8 of the microcomputer 10, and the other terminals of each of the switches S1 to S8 are all grounded, and the input port Pull-up resistors are connected to P1 to P8, respectively.

Any one of the switches S1 to S8 constituting the DIP switch 30 is turned on, and at the time of reading an address, the L signal is input to the input port connected to the switch that is turned on and turned off. Since the H signal is input to the input port connected to the switch, the microcomputer 10 can grasp the on / off state of each of the switches S1 to S8 that configure the dip switch 30, and thus configure the dip switch 30. Depending on the states of the switches S1 to S8 to be operated, it is possible to recognize the address set by the binary number of 8 bits.

When the voltage supplied by the constant voltage circuit 60 is not stable, the switches S1 to S8 are turned on,
When the off state is halfway and not stable, a stable L signal is input to each of the input ports P1 to P8 of the microcomputer 10.
Or a stable H signal cannot be input.

Next, the operation of the above embodiment will be described.

FIG. 3 is a flowchart showing an address reading operation in the operation of the microcomputer 10 in the fire detector 1 according to the above embodiment.

First, the self address for the fire detector 1 is preset in the dip switch 30, and the number of times n of reading the self address from the dip switch 30 is set to "1" (S1), and the dip switch 30 is set. To 2
Port P is the self-address that is set with a base 8 bit
1 to P8 are read, and the read addresses are stored in the RAM 21 as n-th address read data AD _n (S2).

The address of the (n + 1) th time, that is, 2
The address of the second time is read in the same way as the first time (nth time),
The read address is stored in the RAM 21 as the _{n + 1-th} address read data AD _{n + 1} (S1
1), nth address read data AD _n and n + 1
The address read data AD _{n + 1} for the second time is compared (S
12) If both data are the same, the nth address read data AD _n is recognized as a regular address (S13).

That is, the n-th address read data AD _n and the n + 1-th address read data AD _{n + 1}
If and are equal to each other, the output voltage of the constant voltage circuit 60 is stable, so that it can be determined that the value of the read address is proper. In addition, it can be determined that a reading error due to noise or the like is not generated during the address reading.

On the other hand, when the read data AD _n and AD _{n + 1} are different from each other (S12), and when the number of reading times n is within 5 times (S21), the read data AD _{n + 1.}
Is replaced with data AD _n (S22), and the number of readings n
Is incremented by 1 (S23), the address of the n + 1th time, that is, the third time is read, and this read address is stored in the RAM 21 as the _{n +} 1th time address read data AD _{n + 1} (S11). Then, both data AD _n and AD _{n + 1} are compared (S12), and if both data are the same, the n-th address read data AD _n is recognized as a regular address (S13).

In this process, both data AD _n ,
If AD _{n + 1} is different from each other, the number of times of reading is increased by 1, the address is read again, and the addresses are compared. However, in all of the five readings, both data AD _n , AD _{n + 1}
Are different from each other (S12 and S21), an address that is not scheduled to be set, for example, the address "0" is given as the self-address of the fire detector 1 (S24).

That is, when the information read from the switch is read a predetermined number of times and the comparison result that the information read at the nth time and the information read at the (n + 1) th time is not the same, the information about the terminal device is changed to Set to information other than the information that should be set. If an address that is not scheduled to be set in this way is given to the fire detector 1, the fire receiver can recognize that the fire detector 1 has a transmission error during subsequent communication with the fire receiver.

In the operation shown in the flow chart of FIG. 3, the RAM 21 reads the address read n times and n + 1.
When the address read the same time is the same, the address is recognized as its own address. However, n + 2 times are read, and this read data AD _{n + 2} is compared with the _n-th address read data AD _n. When they are all the same, they may be recognized as their own addresses for the first time. The more times you make comparisons like this,
Address can be read stably.

The address read at the nth time and n
When the address read at the + 1st time is compared with the address read at the n + 2nd time or later, and the address read at the nth time, the address read at the n + 1th time, and the address read after the n + 2nd time are the same. , N
The address read the next time may be recognized as a legitimate address. In this case, the address read at the nth time, the address read at the (n + 1) th time, and the n
The address of the terminal device may be set to an address other than the address to be set when the comparison result indicating that the address read after the + 2nd time is the same is not obtained.

In the above embodiment, the DIP switch 30 is provided as a means for setting the address.
Alternatively, other address setting means such as a rotary switch can be used.

Further, although the above-described embodiment is for recognizing an address, instead of reading the address from the switch, the information such as an ID indicating the type of the terminal device may be read from the switch and recognized. Examples can be applied.

Further, although the above-mentioned embodiment relates to the photoelectric fire detector, instead of the photoelectric fire detector, other fire detectors, repeaters, smoke evacuating devices, district acoustic devices, etc.
The above embodiment can be applied to other terminal devices.

[0034]

According to the present invention, when the self-address or the like set in the DIP switch or the like is read, even if the power supply voltage of the fire detector is not stable at the time of its startup, noise is not generated in the signal line. Even if it exists to some extent, another address or the like is not accidentally read as the self-address or the like.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a photoelectric fire detector 1 according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a detailed example of an address setting DIP switch 30 used in the fire detector 1 according to the above embodiment.

FIG. 3 is a flowchart showing an operation of the microcomputer 10 in the fire detector 1 according to the above embodiment.

[Explanation of symbols]

1 ... Photoelectric fire detector, 10 ... Microcomputer, 20 ... ROM, 21 ... RAM, 30 ... DIP switch for address setting, 60 ... Constant voltage circuit.

Continuation of the front page (56) References JP-A-6-111150 (JP, A) JP-A-3-276393 (JP, A) JP-A-63-178393 (JP, A) JP-A-3-201636 (JP , A) JP-A-5-168067 (JP, A) JP-A-5-167679 (JP, A) JP-A-6-139481 (JP, A) JP-A-2-201596 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G08B 29/18 G08B 17/00

Claims (4)

(57) [Claims] 1. A memory for reading the set information a plurality of times from a switch to which predetermined information is set, and storing the read information each time the information is read; n-th time (n is 1 or more) The integer read) and n
Information comparing means for comparing the information read in the + 1st time; and the information read in the nth time is the same as the information read in the n + 1th time, when the information read in the nth time is the same as the normal information. A terminal device in a fire alarm facility, characterized by having: 2. The method according to claim 1, wherein when the information is read from the switch a predetermined number of times, it is not possible to obtain a comparison result that the information read at the nth time and the information read at the (n + 1) th time are the same. A terminal device in a fire alarm facility, characterized in that information of the terminal device is set to information other than the information to be set. 3. A memory for reading the set information a plurality of times from a switch to which predetermined information is set, and storing the read information each time the information is read; n-th time (n is 1 or more) Information read in)
Information comparing means for comparing the information read in the (n + 1) th time and the information read in the (n + 2) th time and thereafter; the information read in the (n) th time, the information read in the (n + 1) th time, and the information read in the (n + 2) th time and thereafter. And a means for recognizing the information read at the n-th time as regular information when the above is the same, the terminal device in the fire alarm facility. 4. The information according to claim 3, wherein when the information is read from the switch a predetermined number of times, the information read at the nth time, the information read at the (n + 1) th time, and the information read after the (n + 2) th time are the same. A terminal device in a fire alarm facility, characterized in that the information of the terminal device is set to information other than the information to be set when a comparison result cannot be obtained.