JPH0863685A - Fire sensor - Google Patents

Abstract

PURPOSE: To improve the reliability of data storage to an EEPROM and to enable a person to visually recognize the possibility that the reliability is degraded by not only stopping the operation of a fire alarm but also operating an indicator lamp in the case of noncoincidence between a password code and a code for password code check. CONSTITUTION: When a fire alarm equipment is installed in a field and the power source is turned on, the code for password code check read out from a ROM 35 is stored in a RAM 41, and the password code read out from a password code storage area 32 is stored in the RAM 41, and stored password code and code for password code check are compared with each other. When they coincide with each other, the following operation, for example, the normal monitor operation is executed. If they don't coincide with each other, a sensor SE is not operated and a confirmation lamp 67 is flickered, and the person who sees the sensor SE can recognize the occurrence of abnormality of the sensor SE.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses at least one data of fire discrimination data and signal transmission data as EEPR.
The present invention relates to a fire detector that is stored in an OM data storage area and sets data accordingly.

[0002]

2. Description of the Related Art In a conventional fire alarm system, a fire receiver and a fire detector perform fire monitoring by transmitting and receiving a coded signal. This fire detector is usually provided with a DIP switch, and its own type and address are set in this DIP switch. With such a fire detector, when starting up the fire alarm system,
The microprocessor reads the address set in the DIP switch and stores it in RAM. Then, when a call signal is received from the fire receiver, when the address in the call signal and the address stored above can be collated, the fire signal is returned to the fire receiver in response to the call signal. To do.

[0003]

By the way, it is conceivable to use an EEPROM instead of the DIP switch. If the address is stored in this EEPROM, the address setting operation is easy, and Since the EEPROM is smaller than the DIP switch, there is a space advantage. In this way EEPROM
When data is stored in, the EEPROM is usually initialized and the data is stored after confirming the operation.

However, in some cases, a fire alarm system may be installed without initializing the EEPROM,
If data is stored without initializing the EEPROM, desired data may not be stored correctly. However, even if the EEPROM has not been initialized, the fact that it has not been initialized cannot be determined only by looking from the outside of the EEPROM, and it may be overlooked that the EEPROM has not been initialized. Therefore, there is a problem that the reliability of data storage in the EEPROM is low.

In addition, data for signal transmission other than the address,
It is conceivable to store the fire discrimination data and the like in the EEPROM, and even when these data are stored in the EEPROM, there is a problem that the reliability of the data storage in the EEPROM is low.

The present invention can increase the reliability of data storage in the EEPROM, and the EEPROM
It is an object of the present invention to provide a fire detector capable of visually appealing when reliability of storing data in the OM may decrease.

Further, data for signal transmission to the EEPROM,
EEPROM for storing fire identification data, etc.
To confirm that the data has been stored in the EEPR
By reading the data one by one from the OM, the EEPR
It is so arranged that the OM stores the desired data.

However, if it is desired to know only the fact that the predetermined data is stored in the EEPROM, if the data is read out from the EEPROM one by one, the reading time is wasted, and the current required to read all the data is large. Is a waste. Furthermore, EEPR
When the predetermined data is not stored in the OM, it cannot be determined only from the outside of the EEPROM that the predetermined data is not stored, and it may be overlooked that the predetermined data is not stored in the EEPROM. Therefore, EEPR
There is a problem that the reliability of data storage in the OM is low.

According to the present invention, when it is desired to know only the fact that predetermined data is stored in the EEPROM, the current can be immediately known, and further, the current required for that can be minimized, and the predetermined data is stored in the EEPROM. It is an object of the present invention to provide a fire detector capable of visually appealing to a user when it cannot detect that it is stored in.

On the other hand, when data is set by storing the predetermined data in the EEPROM, the sum value which is the sum of some of the data stored therein is also
Stored together with the above data, sum the data that is the basis of the sum value, compare the sum value with the sum value, and when both values do not match, do not respond to the call from the fire receiver , It is maintained in the setting waiting state.

However, there is a problem that it is not possible to recognize that the fire detector is in the setting waiting state only by looking at the fire detector from the outside, and in this case, the transmission error occurs only after connecting with the fire receiver. Even if it is found that there is a transmission abnormality, it is not possible to grasp the cause of the transmission abnormality.

[0012] The present invention provides a fire detector which can recognize that the operation of the fire detector such as a waiting state for setting data is stopped just by looking at the fire detector from the outside. The purpose is.

[0013]

SUMMARY OF THE INVENTION The present invention is a fire detector for setting data by storing predetermined data in an EEPROM data storage area, wherein the data storage area is initialized. A PIN code storage area for storing the PIN code shown is provided, and the PIN code stored in the PIN code storage area is compared with the PIN code checking code stored in the program or in a predetermined memory to provide the PIN code. If the code matches the code for code checking, allow the subsequent operation,
If the secret code and the code for checking the secret code do not match, the operation of the fire detector is stopped and the indicator lamp is operated.

[0014]

According to the present invention, a secret code storage area for storing a secret code indicating that the data storage area has been initialized is provided, and if the secret code and the secret code check code match, the process proceeds to the subsequent operation. If the security code and the security code check code do not match, the operation of the fire detector is stopped and the indicator lamp is operated, so the reliability of data storage in the EEPROM can be improved. Yes, and it can be visually appealed when the reliability of storing data in the EEPROM may be reduced.

[0015]

1 is a block diagram of a photoelectric smoke detector SE according to an embodiment of the present invention.

The photoelectric smoke sensor SE includes an MPU (microprocessor) 10, RAMs 41 to 45, ROMs 20 and 3.
5, EEPROM 30, IF51-53, transceiver unit TR
X, a drive circuit 61 of a light emitting element 62 for smoke detection, a light receiving element 63, a light receiving circuit 64, an amplifier 65, and a drive circuit 66 of an operation confirmation lamp 67.

The ROM 20 is a storage area for programs for controlling the entire photoelectric smoke detector SE, programs for the flowcharts shown in FIGS. 2, 4, and 5, and the like.

The EEPROM 30 has a data storage area 3
1, a secret code storage area 32, a data storage information storage area 33, and a sum value storage area 34, which is the sum of the data. The data storage area 31 is an area for storing data such as fire discrimination data and data for signal transmission such as self-address, and the secret code storage area 32 has initialized the data storage area 31. Is an area for storing a PIN code indicating
The data storage information storage area 33 is the data storage area 3
1 is an area for storing data storage information (status information) indicating that predetermined data is stored in 1 for each predetermined data, and the sum value storage area 34 is the EEPROM 3
This is an area for storing a sum value, which is the sum of some of the data stored in 0. An example of the data storage information is shown in FIG.

The ROM 35 is an area for storing a personal identification code checking code for checking that the personal identification code stored in the storage area 32 in the EEPROM 30 is a correct personal identification code.

The RAM 41 is a work area and is a RAM.
42 is an area for storing current state information, which is a RAM
Reference numeral 43 is an area for storing status information sent to a fire receiver (not shown), and RAM 44 is an area for storing various flags. The signal transmission / reception unit TRX transmits / receives a coded signal.

The MPU 10 and the ROM 20 compare the personal identification code stored in the personal identification code storage area with the personal identification code checking code stored in the program or in a predetermined memory, and identify the personal identification code and the personal identification code. When the code for checking the code matches, it is allowed to proceed to the subsequent operation, and when the code for checking and the code for checking the code do not match, the operation of the fire detector is stopped and the indicator lamp is operated. It is an example of the control means.

The first control means causes the indicator lamp to blink or light when the secret code and the secret code check code do not match, and the indicator lamp detects a fire. It is an operation confirmation lamp 67 that operates when it is operated, or a dedicated indicator lamp (not shown) that is separate from the operation confirmation lamp 67 that notifies only that the secret code and the secret code check code do not match. is there.

The operation confirmation lamp 67 is turned on via the drive circuit 66 when a fire signal is sent to a receiver such as a receiver (not shown) in a fire monitoring operation not shown in detail. If the secret code of the EEPROM 30 is not confirmed, the blinking control is performed.
When the operation confirmation lamp 67 is made to blink when a fire is detected, the operation confirmation lamp 67 may be controlled to be turned on when the personal identification code is not confirmed. In this way, the contents indicated by the operation confirmation lamp 67 can be distinguished.

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

FIG. 2 is a flow chart showing the operation of the photoelectric smoke detector SE in the above embodiment.

First, when the sensor SE is installed, data such as fire discrimination data and signal transmission data such as self-address are transmitted from the data setting device, and these data are transmitted.
The data is stored in the data storage area of the EPROM 30, but the data storage area 31 is initialized before the data is stored (when the sensor SE is manufactured, etc.). A secret code (for example, "1010101" is displayed in the secret code storage area 32.
0 ”) is stored. The ROM 35 stores a code for code checking, which is the same code as the code "10101010".

When the fire alarm system is installed on the site and the power is turned on, the code for code check is read from the ROM 35, and the read code for code check is stored in the RAM 41 (S1). The personal identification code is read from the code storage area 32, and the read personal identification code is stored in the RAM 41 (S
2) Compare the secret code stored in the RAM 41 with the check code (S3), and if they match,
Subsequent operation, for example, normal monitoring operation is executed (S
4). As a result, when a fire is detected, the operation confirmation lamp 67 is turned on by the operation of the detector itself or by a command from a fire receiver (not shown).

On the other hand, if the secret code and the check code do not match (S3), the sensor SE does not operate (S5), the confirmation lamp 67 blinks (S6), and the sensor SE is being viewed. The person can know that the sensor SE has an abnormality.

In the above embodiment, if the secret code and the check code do not match, even if a command for data setting is received from the data setter, it does not respond to this command, so initialization is performed. There is no data setting in the unloaded state, and there is no erroneous data setting due to the data setting in the uninitialized state. Therefore, the reliability of the data storage in the EEPROM 30 is high. can do. If the secret code and the check code do not match, the sensor SE will not operate (S3, S5), so the call from the fire receiver will not be answered and incorrect data will be sent to the fire receiver. There is nothing to do.

Further, if the secret code and the check code do not match, the confirmation lamp 67 blinks, so that a person looking at the sensor SE can easily recognize that the sensor SE is abnormal. .

It is to be noted that the sensor SE itself has the EEPROM 3
When it has a function of initializing 0, when the secret code and the check code do not match (S3), the operation is stopped (S5), and instead, the EEPROM 3
0 is initialized and the secret code storage area 32
In addition, the secret code may be stored in the program or using the check code in the ROM 35, or the EEPROM 30 may be kept in the setting waiting state without being initialized by itself. In this setting waiting state, by blinking the operation confirmation lamp 67, the setting waiting state is displayed, and only the initialization command sent from the data setter responds, and does not respond to the call from the fire receiver. .

In the above embodiment, only one type of personal identification code, "10101010", is set, but in addition to this, different personal identification codes, such as "01010101", are set. Accordingly, "01010101" may be stored in the ROM 35 as the second code checking code. When both codes are collated, the first personal identification code and the first personal identification code checking code are collated, and after a coincidence is found in this collation, the second personal identification code and the second personal identification code are compared. It suffices to collate the code with the code for checking and, after a match is found in the second collation, perform the normal monitoring operation. Like this, enter the PIN code 2
If the type is set, the reliability of data storage in the EEPROM 30 can be further increased.

Further, in the above embodiment, the ROM 3
The code for code checking is stored in 5, but R
The secret code check code may be stored in the program stored in the OM 20.

FIG. 3 is a diagram showing the structure of the data storage information in the above embodiment.

FIG. 3A shows the structure of the data storage information part 1. This data storage information part 1 is composed of 8 bits, and if each bit is "0", the data storage information part 1 is stored in that bit. It indicates that the corresponding data is not stored in the data storage area 31 in the EEPROM 30 (the data is undefined). If each bit is "1", the data corresponding to that bit is the data. The data is stored in the storage area 31 of (data is defined). Further, FIG. 3A shows that the data corresponding to bits 0 to 5 constituting the data storage information are stored, and the data corresponding to bits 6 and 7 thereof are not stored. The data corresponding to bits 0 to 5 forming the data storage information are, for example, a failure detection value (for long time detection) and a failure detection value (for a short time) for detecting a failure by comparing with the output of the amplifier 65, respectively. (For detection), an ambient temperature reference value and a set ambient temperature value for compensating the output of the amplifier 65 by the ambient temperature, and an individually set sensor S for specifying the terminal device.
It is the address of E.

FIG. 4 is a flow chart showing another operation of the above embodiment.

When power is turned on and the photoelectric smoke detector SE is started up, the data storage information is read from the data storage information storage area 33 (S11), and the bit forming the data storage information is "1". By detecting
The MPU 10 can recognize that the predetermined data corresponding to the bit is stored in the EEPROM 30. That is, the predetermined data is EEPR based on the data storage information.
It is detected that it is stored in the OM 30 (S12).
Then, it is allowed to proceed to the subsequent operation, and for example, normal monitoring operation is performed (S13). As a result, when a fire is detected, the operation confirmation lamp 67 is turned on by the operation of the detector itself or by an instruction from the fire receiver.

On the other hand, when it is detected that the predetermined data is not stored based on the data storage information (S12),
It is kept in the setting waiting state. In this setting waiting state, the operation of the sensor SE is stopped (S14), the confirmation lamp 67 blinks to notify the outside of the sensor SE that predetermined data is not stored (S15), and the data setter is set. It responds only to the setting command for setting the data sent from (S16, S17), and does not respond to the call from the fire receiver.

Then, if data setting is performed, EEP
Reset the data in the ROM 30 (S16, S1
7) Confirm the data storage information.

Therefore, in the above-mentioned embodiment, since the sensor SE does not operate when the necessary data is not set, the operation reliability of the sensor is improved and the predetermined data is stored. SE when not done
Since the confirmation lamp 67 blinks, the fact that the predetermined data is not stored in the sensor SE can be easily known from the outside of the sensor SE.

FIG. 3B is a diagram showing the structure of the data storage information No. 2, and each bit forming this data storage information has, for example, the output of the amplifier 65 as an analog value corresponding to smoke density. Reciprocal value of characteristic slope (decimal place) and reciprocal value of characteristic slope (integer place), light emission input value for adjusting light emission amount of light emitting element 62, test output for making output of amplifier 65 at the time of test correspond to smoke density Correction value (decimal place) and test output correction value (integer place), test light emission input value that sets the light emission amount at the time of test, so-called noise level A / D conversion value when smokeless (normal light emission) and smokeless This corresponds to the data of the A / D converted value (at the time of test light emission) at the time, and is processed in the same manner as the data storage information No. 1 in FIG.

That is, if the bit is "1",
It indicates that the data corresponding to the bit is stored, and if the bit is “0”, it indicates that the data corresponding to the bit is not stored.

Although it is preferable to check all the bits when checking the data setting deficiency from these data storage information and entering the setting waiting state, this is not always necessary. That is, in the above embodiment, the fire detector SE
Is a photoelectric type, the bit 4 in FIG. 3A may be omitted. The minimum required data is shown in FIG.
Bit 5 of (1), bits 0, 1, 2, 6 of FIG.
It is only possible to confirm selectively. Furthermore, if this data setting information can be read by a data setting device or the like, it is convenient for resetting.

That is, when the MPU 10 and the ROM 20 detect that the predetermined data is stored based on the data storage information, the MPU 10 and the ROM 20 allow the subsequent operation to proceed, and the predetermined data are stored based on the data storage information. If it is not detected, the second setting that responds only to the data setting command sent from the data setting device, does not respond to the call from the fire receiver, maintains the setting waiting state, and operates the indicator lamp It is an example of a control means.

When the second control means cannot detect that the predetermined data is stored on the basis of the data storage information, the second control means blinks or lights the indicator light, and the indicator light is the fire detector. Is an operation confirmation lamp 67 that operates when a fire is detected, or an operation confirmation lamp 67 that is provided separately from the operation confirmation lamp 67 that notifies only that it cannot detect that predetermined data is stored based on the data storage information. It is an indicator light (not shown).

FIG. 5 is a flow chart showing another operation of the above embodiment.

First, in this embodiment, the sensor SE
After the power is turned on, the predetermined data stored in the data storage area 31 and the sum value which is the sum of some of the predetermined data stored in the sum value storage area 34 are EE.
It is stored in the PROM 30.

Then, the reset of the MPU 10 is released (S21), and the data of the EEPROM 30 is read (S21).
22), the total value of the data stored in the data storage area 31 is calculated (S23), and the total value is compared with the sum value stored in the sum value storage area 34 (S2).
4). If the total value and the sum value are the same, it means that the data stored in the data storage area 31 has been correctly received, and the normal monitoring operation is performed (S25). As a result, when a fire is detected, the operation confirmation lamp 67 is turned on by the operation of the detector itself or by a command from a fire receiver (not shown).

On the other hand, if the sum value and the sum value are different (S24), the data stored in the data storage area 31 is incorrect (the reading may be incorrect), and the sensor SE is operated. Stop (S26) and blink the confirmation light 67 to indicate that the data is incorrect (S26).
27). After that, if a data setting command is received from a setting device (not shown) (S28), resetting is performed (S2).
9) If the setting command is not received, the monitoring operation of the sensor SE is stopped and the setting command is waited.

The sum value is a failure detection threshold value by constant value monitoring, a reciprocal value of a characteristic slope for converting a smoke detection value into an analog value, an output value (noise level) when smokeless, an address of a fire detector. Any value that is the sum of at least two of them may be used.

The MPU 10 and the ROM 20 are examples of total value calculating means for calculating the total value of the data on which the sum value is based, and are examples of comparing means for comparing the sum value with the total value. Further, when the MPU 10 and the ROM 20 detect that the sum value and the total value match, the MPU 10 and the ROM 20 allow the subsequent operation to proceed, and respond only to the data setting command sent from the data setter. Also, it is an example of the third control means for operating the indicator lamp while maintaining the setting waiting state in which the call from the fire receiver is not answered when it cannot be detected that the sum value and the total value match.

When the third control means cannot detect that the sum value and the total value match, the third control means blinks or lights the indicator light. The indicator light indicates that the fire detector detects the fire. Or a dedicated indicator light (not shown) that is provided separately from the operation confirmation light 67 that operates when the operation is performed, or the operation confirmation light 67 that notifies only that it cannot detect that the sum value and the total value match. No.).

[0053]

According to the invention described in claims 1 to 4, E
The reliability of data storage in the EPROM can be increased, and when there is a possibility that the reliability of data storage in the EEPROM can be lowered, this can be visually appealed.

According to the invention described in claims 5 to 8, EE
When it is desired to know only the fact that the predetermined data is stored in the PROM, it can be immediately known, and further, the current required for that can be reduced as much as possible, and the predetermined data is stored in the EEPROM. This has the effect of being able to visually appeal this when it cannot be detected.

According to the ninth to eleventh aspects of the present invention, the data in the EEPROM cannot be accurately recognized just by looking at the fire detector from the outside, that is, the fire detector waits for data setting. This has the effect of being able to recognize something.

[Brief description of drawings]

FIG. 1 is a block diagram of a photoelectric smoke detector SE according to an embodiment of the present invention.

FIG. 2 is a flowchart of the operation of the photoelectric smoke sensor SE in the above embodiment.

FIG. 3 is a diagram showing a structure of data storage information in the above embodiment.

FIG. 4 is a flowchart showing another operation of the above embodiment.

FIG. 5 is a flowchart showing another operation of the above embodiment.

[Explanation of symbols]

 SE ... Photoelectric smoke detector, 10 ... MPU, 20, 35 ... ROM, 30 ... EEPROM, 31 ... Data storage area, 32 ... PIN code storage area, 33 ... Data storage information storage area, 34 ... Sum value Storage area.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04L 9/12

Claims (11)

[Claims] 1. A fire detector that sets predetermined data in an EEPROM data storage area by setting the data, and stores a secret code indicating that the data storage area is initialized. PIN code storage area; indicator light;
The secret code stored in the storage area of the secret code is compared with the secret code checking code stored in the program or in a predetermined memory, and the secret code matches the secret code checking code. Then, it is allowed to proceed to the subsequent operation, and when the above-mentioned secret code and the above-mentioned secret code check code do not match, the operation of the fire detector is stopped and the first control means is operated. And a fire detector. 2. The secret code according to claim 1, wherein a plurality of secret codes different from each other are set in a storage area of the secret code, and a plurality of secret code checking codes are prepared according to the number of secret codes. The first control means compares the plurality of personal identification codes with the plurality of personal identification code checking codes, respectively, and if they match, allows the processing to proceed to the subsequent operation. vessel. 3. The first control means according to claim 1 or 2, wherein the first control means blinks or lights the indicator light when the secret code and the secret code check code do not match. , The indicator light is an operation confirmation light that operates when the fire detector detects a fire, or a dedicated indicator light that informs only that the secret code and the secret code check code do not match. Fire detector characterized by being. 4. The method according to claim 1, wherein the first control means initializes the EEPROM and stores a secret code stored in a program or in a predetermined memory in the EEPROM. The secret code stored in this EEPROM is compared with the above-mentioned secret code check code, and when they match, it responds only to the data setting command, and does not respond to calls from the fire receiver. A fire detector characterized by being a means for maintaining a state. 5. A fire detector for setting predetermined data by storing the predetermined data in an EEPROM data storage area, the data storage indicating that the predetermined data is stored in the data storage area. Data storage information storage area for storing information; indicator light; when it is detected that the predetermined data is stored based on the data storage information, the subsequent operation is permitted, and the data storage information is stored. A second control means for stopping the operation of the fire detector and operating the indicator lamp when it is not detected that the predetermined data is stored based on the above. .. 6. The secret code storage area according to claim 5, which stores a security code indicating that the storage area of the data has been initialized; and the security code stored in the security code storage area. , The code for checking the code stored in the program or in a predetermined memory is compared, and if the code for the code and the code for checking the code match, it is allowed to proceed to the subsequent operation. A first control means for stopping the operation of the fire detector and operating the indicator light when the secret code check code does not match with the secret code check code; 7. The display device according to claim 5, wherein the second control means blinks or lights the indicator light when it cannot detect that the predetermined data is stored based on the data storage information. The indicator lamp is an operation confirmation lamp that operates when the fire detector detects a fire, or cannot detect that the predetermined data is stored based on the data storage information. A fire detector characterized by being a dedicated indicator light that informs only that. 8. A setting waiting state according to claim 5, wherein the second control means responds only to a data setting command and does not respond to a call from the fire receiver. A fire detector characterized in that it is a means to do. 9. The EEPR includes a plurality of predetermined data and a sum value which is a sum of at least two of the predetermined data.
A fire detector for storing the data in the OM data storage area and setting the predetermined data, and total value calculating means for calculating a total value of data on which the sum value is based; the sum value and the total value When it is detected that the sum value and the total value match, the comparison means for comparing the sum value and the indicator light is allowed to proceed to the subsequent operation, and the sum value and the total value are equalized. And a third control means for stopping the operation of the fire detector and operating the indicator lamp when it is not possible to detect what is being done. 10. The method according to claim 9, wherein the third control means blinks or lights the indicator light when it cannot detect that the sum value and the total value match. The indicator light is an operation confirmation light that operates when the fire detector detects a fire, or a dedicated indicator light that informs only that it cannot detect that the sum value and the total value match. Fire detector characterized by being. 11. The method according to claim 9 or 10, wherein the third control means is a means for responding only to a command for data setting and for maintaining a setting waiting state not responding to a call from the fire receiver. Fire detector characterized by.