JPH0863680A - Fire sensor - Google Patents

Abstract

PURPOSE: To improve the reliability of data storage to an EEPROM by permitting the advance to the following operation in the case of coincidence between a password code and a code for password check but stopping the operation of a fire sensor in the case of noncoincidence. CONSTITUTION: When a fire alarm equipment is installed in a field and the power source is turned on, the code for password check is read out from a ROM 34 and is stored in a tug 41, and the password code is read out from a password storage area 32 and is stored in the RAM 41. The password code and the code for password code check which are stored in the AAM 41 are collated with each other; and when they coincide with each other, the following operation, for example, the fire monitor operation is executed. If they don't coincide with each other, a sensor SE is not operated.

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. are doing.

[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 can be set easily and the dip Since the EEPROM is smaller than the switch, there is a space advantage. When data is stored in the EEPROM as described above, normally, the EEPROM is 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, there are cases where desired data can be stored accurately and cases where it is not possible. However, even if the EEPROM is not initialized, it cannot be judged only by looking from the outside of the EEPROM that the initialization is not performed.
One may overlook that the EPROM 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.

An object of the present invention is to provide a fire detector which can improve the reliability of data storage in an EEPROM.

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.

The present invention provides a fire detector capable of immediately knowing only the fact that predetermined data is stored in the EEPROM, and capable of minimizing the current required for that purpose. The purpose is.

[0010]

SUMMARY OF THE INVENTION The present invention is a fire detector which sets predetermined data by storing the predetermined data in the data storage area of the EEPROM, and the data storage area is initialized. Is provided with a password code storage area for storing the password code, and the password code stored in the password code storage area is compared with the password code check code stored in the program or in a predetermined memory. When both codes match each other,
It allows the subsequent operation and stops the operation of the fire detector when the two codes do not match each other.

Further, according to the present invention, a data storage information storage area for storing data storage information indicating that the predetermined data is stored is provided in the data storage area, and the predetermined data is stored based on the data storage information. When it is detected that the fire detector is detected, the operation is allowed to proceed, and when the fact that the predetermined data is not stored based on the data storage information cannot be detected, the operation of the fire detector is stopped. .

Each of the above operation stop states responds only to the data setting command sent from the data setter, and maintains the setting waiting state not responding to the call from the fire receiver. Good.

[0013]

The present invention compares the personal identification code indicating that the data storage area has been initialized with the personal identification code checking code stored in the program and the like, and only when the both codes match each other. The operation of the fire detector is stopped when the two codes do not match each other, and the reliability of the data storage in the EEPROM can be increased.

Further, according to the present invention, when it is detected that the predetermined data is stored based on the data storage information indicating that the predetermined data is stored in the data storage area, the process proceeds to the subsequent operation. And the operation of the fire detector is stopped when it is not possible to detect that the predetermined data is stored based on the data storage information.
When it is desired to know only the fact that the predetermined data is stored in the PROM, it can be immediately known, and the current required therefor can be reduced as much as possible.

Further, according to the present invention, in a state where the operation of each fire detector is stopped, the setting waiting state in which only the command for data setting is responded is maintained, so that the call to the fire receiver is not responded. Therefore, it is possible to prevent erroneous information from being transmitted, and a command for data setting can be used to set appropriate data for deficient data to the EEP.
It can be stored in ROM.

[0016]

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

The photoelectric smoke detector SE includes an MPU (microprocessor) 10, RAMs 41 to 45, ROMs 20, 3
4, EEPROM 30, IF 51 to 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 flowchart shown in FIG.

The EEPROM 30 has a data storage area 3
1, a secret code storage area 32, and a data storage information storage area 33. 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. An example of the data storage information is shown in FIG.

The ROM 34 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. In the example of the first control means for permitting the subsequent operation when the code for checking the code matches, and for stopping the operation of the fire detector when the code for checking and the code for checking the code do not match. is there.

When the MPU 10 and the ROM 20 detect that predetermined data is stored in the storage area of the data storage information based on the data storage information, the MPU 10 and the ROM 20 allow the subsequent operation to proceed, and the data storage information is stored. It is an example of the second control means for stopping the operation of the fire detector when it is not possible to detect that the predetermined data is stored based on the above.

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 manufacturing the sensor SE, the EEPRO
Data such as fire discrimination data and signal transmission data is stored in the data storage area of M30. Before storing these data, the data storage area 31 is initialized. When the password is completed, the secret code (for example,
“10101010”) is stored. ROM3
4 stores a code for code checking, which is the same code as the above-mentioned 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 34, 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) collate the personal identification code stored in the RAM 41 with the check code (S3), and if they match,
The subsequent operation, for example, a fire monitoring operation is executed.

On the other hand, if the secret code and the check code do not match (S3), the sensor SE does not operate (S12).

In the above embodiment, if the secret code and the checking code do not match, even if a data setting command is received from a data setting device (not shown), it does not respond to this command. , There is no data setting without initialization, and there is no erroneous data setting due to data setting without initialization. Therefore, EEPRO
The reliability of data storage in M30 can be improved. If the secret code and the check code do not match, the sensor SE will not operate (S
3, S12), did not answer the call from the fire receiver,
It also does not send incorrect data to the fire receiver. A plurality of personal identification codes and their checking codes may be used, whereby it is possible to prevent accidental coincidence of the codes and further improve reliability more strictly. it can.

It is to be noted that the sensor SE is EEPRO by itself.
When the function to initialize M30 is provided and the PIN code and its check code do not match (S
3), while initializing the EEPROM 30 by yourself,
Store the secret code in the secret code storage area 32 (S
8) If the personal identification code and the checking code are compared again and they match each other (S11), the subsequent operation is performed. Further, when the secret code and the check code do not match (S3), the setting waiting state may be maintained. In the setting waiting state here, it responds only to the initialization command sent from the data setter, and does not respond to the call from the fire receiver. As the secret code stored with this initialization (S8), the check code in the ROM 34 may be used, but it may be stored separately.

In the above embodiment, only one type of personal identification code, "10101010", is set, but another personal identification code, such as "01010101", may be set in addition to this. And R
The OM 34 may also store “01010101” 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 collated.
It may be arranged to collate with the PIN code checking code. If you set two types of PINs like this, E
The reliability of data storage in the EPROM 30 can be further increased.

Further, in the above embodiment, the ROM 3
The code for PIN code check is stored in 4, 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. 3 (1) shows the structure of the data storage information No. 1. This data storage information No. 1 is composed of 8 bits, and when each bit is "0", the data 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 address of the sensor SE that is individually set to specify the terminal device.

When the photoelectric smoke detector SE is started up, the data storage information is read from the data storage information storage area 33, and the read data storage information is stored in the RAM 41.
(In this embodiment, it is used for checking the secret code, so it is cleared in step S4) (S5), and by detecting that the bit forming the data storage information is "1" (S6), It can be known that the predetermined data corresponding to the bit is stored in the EEPROM 30. In other words, based on the data storage information,
When it is detected that the predetermined data is stored in the EEPROM 30, it is allowed to proceed to the subsequent operation such as fire monitoring (S7), while it is detected that the predetermined data is not stored based on the data storage information. Then (S
6) The state of waiting for setting is maintained as a state in which the operation of the sensor is stopped. In this setting waiting state, it responds only to the data setting command sent from the data setter, and does not respond to the call from the fire receiver.

Therefore, when the necessary data is not set (S6), the sensor SE does not perform careless operation, and the reliability of the operation of the sensor is improved.

When checking whether or not the data that should be stored in the EEPROM 30 is actually stored, the EEPROM itself can be read without reading the data itself.
The fact that the predetermined data is stored in 30 can be known in a short time, and the current required for that can be reduced as much as possible.

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

In addition, when checking the data setting deficiency from these data storage information and entering the setting waiting state,
It is preferable, but not necessary, to check every bit. That is, in this embodiment, the fire detector S
Since E is a photoelectric type, bit 4 in FIG. 3 (1) may be omitted. The minimum required data is bit 5 in FIG. 3 (1), bits 0, 1, 2 in FIG. 3 (2),
It is only 6 and may be selectively confirmed. Furthermore, this data storage information is convenient for resetting if it can be read by a data setting device or the like.

When it is detected that the predetermined data is stored in the storage area 33 of the data storage information based on the data storage information, the predetermined data stored in the EEPROM 30 are summed, and this total value and the predetermined value are stored in advance. It may be made to wait for the setting if the given sum value is collated and the two do not match.

The sum value is stored in the data storage area 31.
Stored as part of the data stored in.
In this case, the sum value is one of the failure detection threshold value by steady value monitoring, the inverse value of the characteristic slope for converting the smoke detection value into an analog value, the output value (noise level) when there is no smoke, and the address of the fire detector. It may be a value obtained by adding at least two.

[0042]

According to the first and second aspects of the present invention, it is possible to improve the reliability of data storage in the EEPROM.

According to the invention described in claims 3, 4, 5, and 6, when it is desired to know only the fact that the predetermined data is stored in the EEPROM, the current can be immediately known. The effect is that it can be reduced as much as possible.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing an example of a configuration of data storage information in the above embodiment.

[Explanation of symbols]

 SE ... Photoelectric smoke sensor, 10 ... MPU, 20, 34 ... ROM, 30 ... EEPROM, 31 ... Data storage area, 32 ... PIN code storage area, 33 ... Data storage information storage area.

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

Claims (6)

[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: 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, and the PIN code and the PIN code are compared. 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 first control means for stopping the operation of the fire detector And a fire detector. 2. The security code according to claim 1, wherein a plurality of the security codes are set in a storage area of the security code, and a plurality of security code checking codes are prepared according to the number of security codes. The control means of 1 compares the plurality of personal identification codes with the plurality of personal identification code checking codes, respectively, and when they match,
A fire detector characterized by being allowed to proceed to the subsequent operation. 3. 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. A storage area of data storage information for storing information; when it is detected that the predetermined data is stored based on the data storage information, it is allowed to proceed to the subsequent operation, and based on the data storage information, A second detector that stops the operation of the fire detector when it cannot be detected that the predetermined data is stored; 4. The secret code storage area for storing a secret code indicating that the storage area for the data has been initialized; and the secret code stored in the storage area for the secret code. , 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. And a first control means for stopping the operation of the fire detector when the secret code checking code does not match the code. 5. The first control means according to claim 1, wherein the first control means initializes the EEPROM, stores a personal identification code stored in a program or in a predetermined memory in the EEPROM, and stores it in the EEPROM. Means to compare the security code and the code for checking the security code, and when they match, to respond to only the command for data setting, and to keep the setting waiting state not responding to the call from the fire receiver Fire detector characterized by being. 6. The method according to claim 3 or 4, wherein the second 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 a fire receiver. Fire detector characterized by.