JPH0135396B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an operation notification device, and more specifically, the present invention relates to an operation notification device, and more specifically, it transmits an operation signal from a detector provided on each child unit located far away to a central base unit. The present invention relates to an operation notification device for sending an operation signal of a provided detector to a central side, determining at a base unit which slave unit the signal was sent from, and issuing an alarm about the operating state of the slave unit.

[Conventional technology]

For example, in large buildings, temperature detectors, smoke detectors, door opening/closing detectors, passage detectors, etc. are installed in each room, hallway, stairway entrance, etc. in case of abnormal situations such as theft or fire at night. A slave unit equipped with a transmitter, etc. that transmits the operation signal of the detector to the central monitoring side is installed, while a master unit is installed on the central monitoring side and receives the operation signal from the slave unit wirelessly or by wire. The system then determines which handset the signal was sent from and informs staff of the location where the abnormal situation occurred.

In addition, a master unit is installed at the fire station, and a slave unit consisting of a detector to detect the occurrence of a fire and a transmitter to transmit the operating signal is installed in each home. The system identifies the location of the fire and alerts police personnel to the location of the fire.

Furthermore, in each home, slave units consisting of designated detectors, transmitters, etc. are placed at entrances, windows, bathrooms, etc., while base units are installed in places where people are always present. The base unit receives the signal from the machine, identifies which slave unit the signal came from, and reports it, making it possible to immediately know where and what is happening. .

When the detector installed on each slave unit operates in this way, the operating signal is sent to the base unit, and the base unit determines which slave unit the signal was sent from. Conventionally, in order to notify the operating status of a machine, each slave machine was equipped with a frequency generating means specific to that slave machine.
When the detector of a slave unit operates, the frequency signal is sent to the center, while the base unit is set to a frequency unique to each slave unit, and the specific frequency signal sent is set to the base unit. By determining which frequency matches the detected frequency, the handset on which the detector was activated was identified.

[Problem that the invention seeks to solve]

For this reason, with conventional operation notification devices, the frequency generation means on the handset side must be accurately adjusted so that the frequency always matches the frequency set on the base side. There was a drawback that the operation of the handset side was overlooked.

In addition, in such conventional operation notification devices, a bandpass filter must be installed in the base unit to distinguish the frequency signals unique to each slave unit transmitted from each slave unit, and it is necessary to change the transmission frequency of each slave unit. case,
It is not easy to change the passband of the bandpass filter provided in the base unit accordingly.
Moreover, in order to prevent each handset from interfering with each other, it is necessary to make the frequency band width occupied by each handset considerably wide, which has the drawback of limiting the number of handsets.

Furthermore, adjusting the oscillation frequency on the slave unit is quite troublesome, and unless you ask an expert, it cannot be adjusted to exactly match the set frequency of the base unit. Alternatively, the oscillation frequency may fluctuate somewhat due to the influence of power supply fluctuations or the like.

Moreover, even if the frequency of the slave unit is adjusted accurately, if noise pulses are mixed in during transmission, the base unit will not be able to confirm this and the operation of the slave unit will be overlooked. It was hot.

[Means for Solving the Problems] The main purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art, and to digitally process the signal transmitted from the slave unit within the base unit to adjust the oscillation frequency of the slave unit. An object of the present invention is to provide an operation notification device that allows a base unit to reliably check the operating state of a slave unit without being affected by fluctuations in the speed and noise pulses.

Furthermore, the present invention provides that the status detector provided in the handset is composed of a passing detector, and when the status detector operates for a short period of time, such as when a person or a car momentarily crosses the detection position, Another object of the present invention is to provide an operation notification device that allows a base unit to check the operation of a slave unit and reliably notify the operation.

In order to achieve these objects, the present invention comprises a detection means for detecting a predetermined state change, and a pulse generation means for generating a pulse signal at a predetermined rate within a reference time, and when the detection means is activated. a plurality of slave units that transmit the pulse signals; an identification unit that receives the pulse signal transmitted from the slave unit and identifies the slave unit that has transmitted the pulse signal based on the pulse signal; In the operation notification device, the operation notification device includes a base unit comprising a notification means for notifying the operation of the identified slave unit in response, and the base unit contains a number of pulse signals generated from each of the slave units within the reference time. a count means for dividing and counting the pulse signal from the slave unit inputted to the base unit at each of the reference times; a subtraction means for comparing and determining deviation values; a determination means for determining whether all the deviation values fall within a predetermined range; and a determination means for determining whether all the deviation values fall within a predetermined range. approximation processing means for approximating any one of the retrieved count values to one of the set values of the handset identification number setting means; and a coincidence judgment means for making a coincidence judgment, and the identification means is configured to identify the child device that transmitted the pulse signal.

〔Example〕

Hereinafter, an embodiment will be described with reference to FIGS. 1 and 2, in which the operation notification device of the present invention is applied to a case where the operation status of a four-wire slave device is identified and the operation notification is performed using a wireless transmission means.

In FIG. 1, S ₁ to _{S 4} are slave devices, and each slave device includes a state detector 1 as a detection means for detecting a change in a predetermined state of a temperature detector, smoke detector, door detector, passage detector, etc. , a pulse generator 2 that generates a pulse signal f _s of a frequency specific to the slave unit when the status detector 1 operates, a carrier wave f _c generator 3 for transmitting the pulse signal to the base unit S, and a transmitter. 4 and a transmitting antenna 5.

On the other hand, the base device includes a receiving antenna 6, a receiver 7, a handset identification number setting section 81 as a handset identification number setting means,
The signal processing device 8 includes a reference time signal generation section 82, an arithmetic processing section 83, and an operation notification section 84.

The receiver 7 further includes an amplification unit 71 that amplifies the received signal f _c +f _s , a detection unit 72 that separates and extracts a pulse signal f _s specific to the slave device from the amplified signal, and further converts the signal into a waveform. Shaped and pulse signal f _s specific to the slave unit
It consists of a waveform shaping section 73 that restores the waveform.

Further, the configuration of each part within the signal processing device 8 is configured as shown in FIG. 2, for example.

Reference time signal a from reference time signal generator 82
is input to an electronic switch drive circuit 83A that drives an electronic switch 83B.

The electronic switch driving circuit 83A differentiates the reference time signal a and drives the electronic switch 83B with each differentiated pulse signal P. As a result, the electronic switch 83B changes the common terminal _Cc to the terminals C1 to _C1 at every reference time _T0 .
Each _counter 831 to 8 serves as a counting means by dividing the pulse signal f _s from the slave unit taken out from the receiver or 7 into units of reference time _T0 .
34 in order and count. Note that C ₀ is a terminal indicating the standby position.

Each of the counters 831 to 834 has a one-digit bit configuration and is configured to store two binary coded decimal digits.

The outputs of each of the counters 831 to 834 are input to a subtraction circuit 835 as a subtraction means, where the difference between the count value of the counter 831 and the count value of 832 is calculated sequentially.
The difference between the count values of 4,834 and 831, that is, the deviation value, is calculated and added to the determination circuit 836.

The determination circuit 836 as a determination means determines whether all the deviation values are within a predetermined range.When it is determined that all the deviation values calculated by the subtraction circuit 835 are within the predetermined range. , the output is taken out to the approximation processing circuit 837, where the counter 83
Any one of the count values 1 to 834, for example, the count value of the counter 834, is taken out and subjected to approximation processing such as rounding off or truncating less than a predetermined number.

For example, when rounding down a value from 0 to 3, the approximation processing circuit 837 serving as the approximation processing means may be configured to forcibly reset the lower two bits of the first digit.

The processing result value thus approximated by the approximation processing circuit 837 is then transferred to a register 838 and held therein.

811 is each slave device identification number setting means, for example,
It consists of a handset identification number setting section consisting of an AND matrix, and each matrix intersection point is shown in Figure 2b.
By connecting a series circuit of a diode D and a switch SW as shown in and turning on a predetermined switch SW in the row (horizontal) direction, a signal is generated from a predetermined slave unit at a reference time T ₀ and processed by approximation. Set the number of pulses to be extracted in binary coded decimal notation.

For example, the AND matrix shown in Figure 2a is
It is configured to correspond to a 2-digit setting value with 4 bits per digit, and the output lines y ₁ , y ₂ , y ₃ , y ₄ of each bit from the second digit of register 838 and this output line Branch from inverter NOT ₁ ,
The NOT output lines y ₁ , ₂ , ₃ , ₄ via NOT 2 , NOT ₃ , _{NOT 4} intersect with the row direction line _, and the slave units S ₁ , S ₂ . . . generate approximately 50 pulses within the reference time T _0. When generating pulse signals _{f s1} , f _{s2 . .} . at a frequency of , 70 pulses . Only ... is set in binary 4 bits. 〓 in the figure represents the state in which the identification number has been set by turning on the switch SW, and when setting ``5'' to the row direction setting device 〓 ₁ , the 〓〓 〓〇〇〓〓〇”.

Therefore, from this setting section 811, the register 83
When the value held in 8 matches the slave device identification number set value set in each row direction of the setter 811, an output is generated at the matching row direction output terminals ₀₁ to ₀₄ . The coincidence determining means is configured in this way.

The operation notification section 84 includes a display 841 that displays that each slave device has operated, and an alarm sound generator 842 that generates an alarm sound specific to the slave device.
In response to the output from 11, a predetermined alarm operates.

Next, its operation will be explained.

For example, if the status detector 1 provided in the slave unit S ₁ operates, it will cause ₅₀
A pulse signal with a frequency generated at the rate of pulses
A pulse generator 2 that generates f _s1 and a carrier wave f _c generator 3 operate. In the transmitter 4, a signal obtained by modulating the carrier wave f _c with a pulse signal wave f _s1 is sent to the antenna 5.
Send from to base unit S ₀ .

In the base unit S ₀ , the antenna 6 receives the signal transmitted from the slave unit S ₁ , and the receiver 7 amplifies, detects, and
Processing such as waveform shaping is performed to restore the pulse signal f _s1 generated by the slave unit S ₁ and take it out.

Next, this pulse signal f _s1 is input to the signal processing device 8 provided in the base unit S ₀ .

When the pulse signal f _s1 is input to the signal processing device 8,
The electronic switch drive circuit 83A of FIG. 2 immediately operates to connect the common terminal C _c and the terminal C ₁ and input the pulse signal f _s1 to the counter 831. The counter 831 counts the number of input pulse signals f _s1 during the reference time T ₀ . When the reference time T ₀ has elapsed, the next pulse P will cause the electronic switch to switch to the next terminal.
Stepping to _C2 , the pulse signal _fs1 is input to the counter 832 this time.

Thereafter, in the same manner, after inputting the pulse signal f _s1 to the counters 833 and 834 one after another at each reference time T ₀ , the electronic switch 83B returns to the initial standby position, that is, the terminal C ₀ .

On the other hand, the counted values K ₁ to _{K 4} inputted to the counters 831 to 834 and sequentially and continuously counted at each reference time T ₀ are transferred to a subtraction circuit 835 .

The subtraction circuit 835 calculates K ₁ −K ₂ =△K 1 , K ₂ −K 3 =△K ₂ , K _{3 −K 4} =△ based on _the calculated values K ₁ to K ₄ .
The subtractions K ₃ , K ₄ −K ₁ =ΔK ₄ are performed, and the results are added to the determination circuit 836 .

For example, the number of pulses sent from the slave device S ₁ to the parent device S ₀ may be affected by fluctuations in the pulse oscillation frequency, noise pulses mixed during transmission, etc., resulting in the count values K ₁ to _{K 4} of each counter 831 to 834. are each K ₁ = 50,
When K ₂ = 52, K ₃ = 51, and K ₄ = 53, the subtraction circuit 835 performs each of the above subtractions to calculate each deviation value as △
K ₁ =-2, K ₂ =1, K ₃ =-2, and K ₄ =3.

The determination circuit 836 determines whether or not these deviation values fall within the allowable error range, and outputs an output signal to the approximation processing circuit 837 if all of the deviation values fall within the allowable range.

For example, if the allowable error range is -3 to +3, all of the deviation values fall within the allowable error range, so the output is given to the approximation processing circuit 837.

The approximation processing circuit 837 receives the output of the determination circuit 836, takes out the count value _K4 of the counter 834, and performs approximation processing on it.

For example, if the variation in the count value is within the range of 1 to 3, it is caused by a noise pulse mixed in during transmission, and you want to distinguish it from abnormal input pulses that have a larger variation. In this case, approximation processing is performed to round down the count value from 1 to 3.

As a result, the count value K ₄ =53 is calculated by the approximation processing circuit 83.
7 equals 50 and is held in a register 838 consisting of 2 digits with 4 bits per digit.

On the other hand, as a result of 50 being set in binary coded decimal in 〓 ₁ of the handset identification number determination unit 811, the register 83
8 each bit output (in this case, 2 ⁰ of register 838
"1" is output from point 2 and ² ) is the AND circuit configured by the set value of ₁ of the handset identification number determination unit 811 (i.e., the location marked with 〓 where the switch SW is turned on). Output terminal that satisfies the AND condition
Generates output on O ₁ .

This output drives a display 841 representing the slave unit S ₁ of the operation notification unit 84 and an alarm sound device generator 842 that generates an alarm sound specific to the slave unit S ₁ .

In this way, the signal sent from slave unit S ₁ is sent to base unit S _0.
, the pulse generation signal f _s1 is continuously taken out at each reference time T ₀ and compared before and after to find the deviation value, and if this deviation value is within a predetermined value,
After approximating the count value _K4 , it is compared with the slave unit identification number setting value and the operation of the slave unit _S1 is notified.If the deviation value does not fall within a predetermined value, No output is output from the determination circuit 836, and no subsequent processing is performed.

At this time, the electronic switch drive circuit 83A monitors this state, and if an input signal is present in the receiver 7, it immediately drives the electronic switch 83B again and sends a new pulse signal f _s1 to each counter 831 to 834.
Enter.

Also, if the deviation value is within the specified value and the count value is
_K4 approximation processing is performed, and even if the approximation value does not match the slave unit identification number setting value, reading of the next input pulse is immediately started.

In the above embodiment, regarding the input pulse signal having a time four times the reference time T ₀ , this is referred to as the reference time.
Although the method is divided into pulse signals for each T ₀ and counted, and the deviation value of each count value is calculated, this is just an example, and it can be done for a time input pulse signal that is an arbitrary multiple of the reference time T ₀ . Of course.

Further, in the above embodiment, the signal processing after counting the input pulse signals is performed using a subtraction circuit, a determination circuit, an approximation processing circuit, etc. However, these processes may be performed using a microcomputer. Needless to say.

[Action/effect of the invention]

As described above, according to the present invention, the present invention includes a detection means for detecting a predetermined state change and a pulse generation means for generating pulse signals at a predetermined rate within a reference time, and when the detection means operates. a plurality of slave units that transmit the pulse signal; an identification unit that receives the pulse signal transmitted from the slave unit and identifies the slave unit that has transmitted the pulse signal based on the pulse signal; and the identification unit; In the operation notification device, the operation notification device includes a base unit comprising a notification means for notifying the operation of the identified slave unit in response to a pulse signal generated within the reference time from each of the slave units in the base unit. a number setting means for each handset identification number representing a number; a counting means for dividing and counting the pulse signal from the handset inputted to the base unit at each of the above reference times; a subtracting means for calculating a deviation value by comparing before and after; a determining means for determining whether all the deviation values fall within a predetermined range;
When the determination means determines that all the deviation values are within a predetermined range, any one of the extracted count values is approximated to one of the set values of the handset identification number setting means. The identification means is composed of an approximation processing means for processing, and a coincidence judgment means for judging the coincidence between the approximation processing result and the above-mentioned handset identification number setting value, and identifies the handset that transmitted the pulse signal and operates the same. Since notification is performed, the number of pulses extracted by the base unit may vary slightly due to the ambient temperature of the slave unit, variations in elements, deviations in power supply voltage trigger timing, or noise pulses during transmission. However, as a result of approximating this and comparing it with the slave unit identification number setting value set in the base unit, the operation of the slave unit will not be overlooked.

In addition, since the input pulse signal is continuously extracted and processed by dividing it into each reference time _T0 , high-speed processing is possible, and the operation of the slave unit can be instantly captured and reliably processed. It is possible to notify the operation. Furthermore, since the base unit receives signals sent from the slave unit and digitally processes them to identify the slave unit, it is easy to set the number of slave unit identifications, and the number of slave unit Since it is not necessary to make the occupied transmission frequency bandwidth very wide, the number of handsets can be increased, and other excellent effects are achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an operation notification device according to an embodiment of the present invention, FIG. 2a is a schematic diagram of the inside of the base unit, and FIG. be. _S0 ...Main unit, _S1 , _S2 ...Slave unit, 1...Status detector, 2...Pulse generator, 3...Carrier wave generator,
4... Transmitter, 5... Transmitting antenna, 6... Receiving antenna, 7... Receiver, 8... Signal processing device,
81, 811...Slave unit identification number setting section, 82...Reference time signal generation section, 83A...Electronic switch drive circuit, 83B...Electronic switch, 831-834
... Counter, 835 ... Subtraction circuit, 836 ...
Judgment circuit, 837... Approximation processing circuit, 838...
Register, 841...Display device, 842...Alarm sound generator.

Claims (1)

[Claims] 1. A plurality of slave units that are comprised of a detection means that detects a predetermined state change and a pulse generation means that generates pulse signals at a predetermined rate within a reference time, and that transmits the pulse signals when the detection means operates. and,
Identification means for receiving the pulse signal transmitted from the slave unit and identifying the slave unit that transmitted the pulse signal based on the pulse signal; and notification of the operation of the identified slave unit in response to the identification means. In the operation notification device, the operation notification device is provided with a base unit comprising a notification means for performing the above operation, in the base unit, each slave unit identification number setting means representing the number of pulse signals generated from each of the slave units within the above reference time, and the above-mentioned a counting means for dividing and counting the pulse signal from the slave unit inputted to the base unit at each of the reference times; a subtracting unit for calculating a deviation value by comparing the counted values of the counting unit before and after in the order in which they are taken out; A determining means for determining whether or not all the deviation values fall within a predetermined range; and one of the counted values extracted when the determining means determines that all the deviation values fall within the predetermined range. an approximation processing means for approximating the result of the approximation process so that it becomes one of the set values of the handset identification number setting means, and a coincidence determining means for determining whether the result of the approximation process matches the said handset identification number setting value. An operation notification device comprising an identification means to identify a slave unit that has transmitted the pulse signal.