JP3415897B2 - Fire transmitter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire transmitter,
More particularly, the present invention relates to a fire transmitter for transmitting a signal indicating the occurrence of a fire to a receiver such as a fire receiver or a repeater when a push button switch is operated. 2. Description of the Related Art Generally, a fire transmitter of this type includes a push button switch operated by a person. When this push button switch is operated, a fire information signal indicating the occurrence of a fire, for example, a fire signal is received. To a receiving unit such as a transmitter or a repeater. Then, in the case of a so-called polling type fire alarm system, when the fire transmitter receives a call from the receiving unit, it reads the operating state of the push button switch, that is, whether the push button switch is in the off state or the on state, and according to the operating state. A signal is sent to the receiving unit as fire information. In the receiving unit, if the fire information received from the fire transmitter is in the ON state of the push button switch, the fire transmitter is operated by the fire and the fire signal is transmitted. Judgment is made, and an alarm operation such as sounding the main audio device or the audio device in the corresponding area is performed. [0003] By the way, in the conventional fire transmitter, when the fire transmitter reads the operation state of the push-button switch, regardless of whether the push-button switch is in the off-state or the like, for example, induction noise or the like is generated. When the electric noise is detected, it is determined that the push button switch is in the on state, and fire information indicating that the push button switch is in the on state is sent to the fire receiver when called out from the fire receiver. As a result,
The fire receiver determines that a fire information signal indicating the occurrence of a fire has been received from the fire transmitter, and performs an erroneous alarm operation. To prevent this, when a fire information signal indicating a fire is received from a fire transmitter to a fire receiver, it is determined that a fire has occurred when fire occurrence information is subsequently received. It is conceivable to provide a storage function to be performed. However, fire receivers
In addition to fire transmitters, various types of terminal equipment such as various types of fire detectors, such as photoelectric type, ionization type, thermal type, gas type, etc. The location where the notification equipment is installed, that is, the address given to each terminal device differs for each building, and therefore, the storage function must be set for a different address for each installation location, and the time and labor becomes extremely complicated. There is a problem that a setting error occurs. The present invention has been made to solve such a problem. When a noise component is detected, erroneous fire information indicating that a push button switch is in an on state is sent to a receiving unit. An object of the present invention is to obtain a highly reliable fire transmitter that does not cause an erroneous alarm operation. [0006] A fire transmitter according to the present invention has a storage means for sequentially storing a plurality of latest operation states of a push button switch operated when a fire occurs, and a storage means for the storage means. State determination means for determining a large number of operation states of the plurality of operation states of the push button switch, and transmission means for transmitting fire information based on the operation state of the push button switch determined by the state determination means. It is a thing. According to the present invention, the latest plural times of the operation states of the push-button switches operated at the time of fire occurrence are sequentially stored, and a large number of the operation states of the stored plural times of the operation states of the push-button switches are stored. Is determined, and fire information is transmitted to the receiving unit based on the determined operation state of the push button switch. That is, the operation state of the push button switch operated when a fire occurs is determined by majority logic, and the detection output determined by this majority logic is sent to the receiving unit as current fire information. Thus, a noise component generated instantaneously can be eliminated, and when detecting a noise component, erroneous fire information indicating that the push button switch is in an on state is not sent to the receiving unit. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, reference numeral 1 denotes a receiving unit such as a fire receiver or a repeater provided in, for example, a security room or a disaster prevention center, 2 denotes a fire transmitter connected to the receiving unit 1, and 3 denotes various arithmetic processing described later. Microprocessor units (hereinafter, referred to as MPUs) 4 and 5 as state determining means for performing the above operations are a data bus and a control bus connected to the MPU 3, respectively. Reference numeral 6 denotes a read only memory (hereinafter referred to as a ROM) as storage means connected to the MPU 3 via the data bus 4 and the control bus 5, and the ROM 6 is shown in FIGS. It includes a storage area 61 in which programs related to various flowcharts are stored in advance, and a storage area 62 in which self addresses and the like are stored in advance. Reference numeral 7 denotes a random access memory (hereinafter, referred to as RAM) as storage means connected to the MPU 3 via the data bus 4 and the control bus 5.
The RAM 7 includes a work area 71 used when the MPU 3 performs arithmetic processing and the like, and a storage area 7 for storing the latest plural times, for example, three times of the state of a push button switch described later.
2 and a storage area 73 for storing detection data and the like to be sent to the receiving unit 1. A push button switch 8 is operated by a person in the event of a fire. One end of the switch is connected to a positive power supply terminal + B, and the other end is grounded via a resistor 9. The connection point between the push button switch 8 and the resistor 9 is connected to the input side of an interface (hereinafter referred to as IF) 10 connected to the MPU 3 via the data bus 4 and the control bus 5. 11 is an IF connected to the MPU 3 via the data bus 4 and the control bus 5, and 12 is an IF
A transmission / reception circuit, which is connected between the reception unit 11 and the reception unit 1 and is not shown, includes a reception circuit, a serial / parallel conversion circuit, a parallel / serial conversion circuit, a transmission circuit, and the like. 13,1
Reference numeral 4 denotes a fire detector connected to the receiver 1, and reference numeral 15 denotes another fire transmitter. Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS. Note that all determinations in the following operation description are performed by the MPU 3.
First, power is supplied to the fire transmitter 2 from the receiving unit 1 in a security room, a disaster prevention center, or the like. In step S1 in FIG. 2, initial values are set in the RAM 7, the IF 10, the IF 11, and the like. In step S3, it is determined whether or not a signal is received. If the signal is not received, the process waits until the signal is received. If the signal is received, the process proceeds to step S3.
It is determined whether or not the received address code received from the server and the own address code stored in the storage area 62 match. If the fire transmitter 2 is not called in step S3, the process waits until called, and if called, proceeds to step S4 to determine whether or not the so-called sum check is OK, that is, the reception address code and the reception command. It is determined whether or not the sum of the codes is equal to the received sum check code. If not, the process returns to step S2 because the received signal is abnormal. If OK, the process proceeds to step S5 to determine whether the command is a return command of the detection data. If not, the process proceeds to step S6 to perform a process corresponding to the receive command, for example, a function test of the fire transmitter 2. After that, the process returns to step S2 to repeat the above operation. If it is a return command in step S5, the flow advances to step S7 to read out the detection data code to be transmitted from the storage area 73 of the RAM 7, and in step S8,
A sum check code is created, that is, the sum of a reception address code, a reception instruction code, a reception sum check code, and a detection data code is used as a sum check code. Next, the data code and the sum check code are sent to the receiving unit 1. Then, in step S10 of FIG.
The operation state of the push button switch 8 from the MPU 3 via the data bus 4 to the IF 10, that is, the push button switch 8 is turned on (for example, high level) when a fire occurs,
When a fire has not occurred, the push button switch 8 reads the off state (for example, low level) and stores it in a predetermined position of the storage area 72 of the RAM 7. The way of storage in the storage area 72 is, for example, as shown in FIG. That is, as shown in the figure, if the reading state of two times before, the reading state of one time before, and the current reading state are stored in order from the bottom, in the next reading state, the reading state is read two times before. I will throw it away. Next, in step S11, the MPU
3 reads out these reading states from the storage area 72, determines an operating state that occupies a large number of operating states of the push button switch 8 for a plurality of consecutive times, for example, three times, and finally,
In step S12, the data code corresponding to the determined state information is stored in the storage area 73 of the RAM 7. Then, returning to step S2, the above-described operation is repeated. Thus, the data stored in the storage area 73 is sent to the receiving unit 1 as fire information indicating the current operation state of the push button switch 8. As described above, in the present embodiment, the operating state that occupies the majority of the operating states of the push button switch 8 for three consecutive times is determined, that is, the operating state of the push button switch 8 is determined by majority logic, and Since the operation state of the push button switch 8 determined by the logic is sent to the receiving unit as the current fire information, a noise component generated instantaneously can be eliminated, and when the noise component is detected, the push button switch is turned on. The erroneous fire information indicating the state is sent to the receiving unit and the erroneous alarm operation is not performed. Also,
Responsiveness can be ensured by rewriting each time the majority decision value is sampled. In the above-described embodiment, a state that occupies a large number is determined from the read states of the operating states of the push button switch 8 for three consecutive times, and this determination result is used as a fire indicating the current operating state of the push button switch 8. The case where the information is transmitted to the receiving unit as the information has been described. In this case, how many times the read state of the operation state of the push button switch 8 is used in determining the state that occupies the majority is determined if reliable fire information is obtained. It is not limited to the above values. In the above embodiment, other means such as a dip switch or an EEPROM may be used instead of the storage area 62 for storing the self address and the like. Further, in the above embodiment, the operation state of the push button switch 8 is read in response to the call from the receiving unit 1, but a timer for generating an output every 3 seconds is provided in the fire receiver 2, for example. Switch 8 by the output of
May be read. In this way, it is possible to connect to a so-called P-type fire receiver. As described above, according to the present invention, the storage means for sequentially storing the latest plural times of the operation states of the push-button switches operated in the event of a fire, and the plurality of storage states stored in the storage means Since there are provided state determination means for determining a large number of operation states among the operation states of the pushbutton switches for a number of times, and transmission means for transmitting fire information based on the operation states of the pushbutton switches determined by the state determination means, The noise component generated instantaneously can be eliminated, and when the noise component is detected, erroneous fire information indicating that the push-button switch is on is transmitted to the receiving unit to cause an erroneous alarm operation. There is an effect that a highly reliable fire transmitter with excellent responsiveness can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing one embodiment of a fire transmitter according to the present invention. FIG. 2 is a flowchart for explaining the operation of FIG. 1; FIG. 3 is a flowchart for explaining the operation of FIG. 1; FIG. 4 is a diagram for explaining the operation of FIG. 1; [Description of Signs] 1 Receiver 2 Fire transmitter 3 Microprocessor unit (MPU) 6 Read only memory (ROM) 7 Random access memory (RAM) 8 Push button switch 12 Transmitter / receiver circuit

Claims (1)

(57) [Claims 1] A storage means for sequentially storing a plurality of latest operation states of a push button switch operated in the event of a fire, and a plurality of the push buttons stored in the storage means State determining means for determining a number of operating states among the operating states of the switches; and transmitting means for transmitting fire information based on the operating states of the push button switches determined by the state determining means. Fire transmitter.