JPH02117257A - Simple data transmission/reception method - Google Patents

Abstract

PURPOSE:To recognize progress from the generation to the completion of a communication factor with a simple means successively by constituting the contact information bit of a various kinds of sensors from a slave station of three bits set at ON, continuous, and OFF states. CONSTITUTION:When a data signal by no-voltage contact input, etc., from either the various kinds of sensors 25 of the slave station 20 is inputted to automatic communication equipment 26, the automatic switching of a line and the conversion of the signal to a tone signal are performed, and it is transmitted to a master station 21 via central offices 22 and 23. ln such a case, the contact information bit from the slave station is constituted of three bits set at the ON, the continuous, and the OFF states, and at the station 21, ON and continuous bits rise first, and next, only the ON bit falls at a time when communication is completed, and the continuous bit remains. When the communication factor is diminished and a state is recovered to an initial state, the continuous bit falls, and simultaneously, the OFF bit rises, and it falls at a time when the communication of the initial state is completed. In such a way, it is possible to recognize the transmission/reception of a few amount of data successively with inexpensive facility and the simple means, and to improve safety and reliability.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a simple data transmission/reception method using public telephone lines, and more specifically, to a simple method for automatically reporting information from various sensors such as management and monitoring of industrial systems and security systems. 8 data transmission/reception method.

[Traditional technique south]

Normally, large computers send and receive data using public telephone lines. A method of transmitting and receiving data using this public telephone line is shown in FIG. 5 and will be explained. In this data transmission/reception method, a slave station (1) and a master station (2)
and the telephone exchange (4) via the public telephone line (3).
Connect with (5). The above slave station (1) and master station (2) are:
CPU (central processing unit) (6) (7), modem (
8) (9) and NCU (Network Control Unit) (10)
It is composed of (11).

Data transmission and reception by the device described above is performed as follows. That is, data input to the CPU (6) in the slave station (1) is sent to the public telephone line (3) via the modem (8) and NCU (10), and then to the telephone exchange (4) and (5) at the central office. The master station (2) receives the data transmitted from the slave station (1). In this master station (2), data is transmitted to CP' via NCU (11) and modem (9).
It is sent to U (7) and output from this CPU (7).

(Problems to be Solved by the Invention) By the way, the data transmission and reception method described above is suitable for transmitting and receiving a large amount of data at high speed, but the device itself is very expensive and is not suitable for management monitoring of industrial systems or security systems. It is not suitable for transmitting and receiving small amounts of data, such as when automatically reporting information from various sensors, etc., because the equipment is expensive.

Further, in the data transmission/reception described above, the information bit from the slave station is normally configured as two bits, one in an ON state and the other in an OFF state. Therefore, at the parent station, the time of occurrence of the reporting factor,
Even if it is possible to recognize the time when the report is completed, it is difficult to know the state of progress between the time of occurrence and the time of completion, that is, how much time has passed since the time of occurrence, and various changes at the slave station. It was impossible to detect sensor malfunctions, etc.

This problem was noticeable when a large number of slave stations were connected to one master station.

The author previously proposed a simple data transmitting and receiving device that transmits and receives small amounts of data at low speed (Japanese Patent Laid-Open No. 62-21
4760.214761.214762.279770
Therefore, based on this, we can use simple means to prevent the occurrence of reporting factors! The purpose of the present invention is to provide a simple data transmission/reception method that allows continuous recognition until the completion of one report.

[Means to solve the problem]

The technical means for achieving the above object of the present invention is to transmit a tone signal based on a DTMF signal in a push-button dial telephone from a slave station over a public telephone line, receive the tone signal at a master station, and transmit it to a BCD. This is a simple data transmission/reception method for converting signals into signals, and the contact information bits of various sensors from the slave station have a 3-bit configuration of ON, continuation, and OFF states.

[Effect]

In the simple data transmission/reception method according to the present invention, a slave station converts various data signals including input signals from various sensors into tone signals based on DTMF signals. This tone ta is transmitted from the slave station via the public telephone line, and at this time, the contact information bits of the various sensors mentioned above from the slave station are turned ON! I! Continuing, the 3-focus configuration is in the OFF state. This makes it possible for the master station to continuously recognize the process from the occurrence of a reporting factor at the slave station until the completion of the report.

〔Example〕

An example of an apparatus for implementing the simple data transmission/reception method according to the present invention will be described below.

The simple data transmitting/receiving device shown in Fig. 2 consists of a pair of slave stations (2
0) and a master station (21), and the slave station (20) and the master station (21) are connected by a public telephone line (24) via exchanges of telephone offices (22) and (23).

In the slave station (20), (25) is an analog input;
Various sensors for automatic notification using non-voltage contact input and pulse input, etc. (26) is the automatic notification device described below to which the above various sensors (25) are input connected, (27) is the existing telephone, (28) is the above Automatic notification device (26) and telephone (2
The disconnector connected to 7) is a device that disconnects the automatic notification device (26) from the line in the unlikely event of electrical interference.

(29) is a safety hook connected to the container (28). The automatic 1i11 alarm device (26) has a built-in CPUC30) as shown in FIG.
) is connected between the analog input terminal and the CPU (30) and the multiplexer (31) and the A/
Connect the D converter (32). Further, a power supply switching unit (33) is connected between the power input terminal and the CPU (30).

On the other hand, a telephone (2) is connected between the output terminals of the CPU (30).
7) Line control unit (34) which performs automatic line switching
, and DTMF (Dua
l Tone Multi Frequency
) signal to generate a tone signal based on the DTMF r
Connect C (35). Further, a setting device (36) can be connected to the external terminal as necessary. This setting device (3
6) is to set initial data such as the non-voltage contact input type and contact input timer of various sensors (25) in the CPU (30) by operating the numeric keypad or the like. In addition, in the figure, (
37) is a time base having a clock function such as the time of occurrence of a reporting factor, and (38) is a switch for switching between at-home and absentee status.

Next, in the master station (21) in FIG. 2, (39) is an automatic receiving device which will be described later, and (40) and (41) are a personal computer and printer connected to the automatic receiving device (39). The automatic receiving device (39) has a built-in CPU (42) as shown in FIG.
), a line control unit (44) that performs automatic line switching with the existing telephone (43), a DTMF/BCD conversion unit (45), and an FF7 dial/DTMF generation (
fi control unit (46), personal computer (40
) is connected to B CD/R5232C converter (47)
, data memory section (48), printer I/F capital (49) to which the printer (41) is connected, I\Fuchibe (50)
) and a setting device 1/F section (51) to which a setting device (33) can be connected as necessary. This setting device (36
) is the automatic notification device (26) at the slave station (20) mentioned above.
Similarly to the above case, data such as dial pulse type and telephone number are set in the CPU (42) etc. by operating the numeric keypad or the like.

Before using the above simple data transmitting and receiving device, connect the setting device (36) to the automatic notification device (26) of the slave station (20), and set the non-voltage contact input type and contact input timer of various sensors (25), etc. The initial data of is set in the CPU (30).

When using the simple data transmitting/receiving device, when a data signal is input from any of the various sensors (25) by analog input, non-voltage contact input, or pulse input to the automatic notification device (26), the control of the CPS (30) is performed. The line control unit (3
4), automatic line switching is executed, and DTMF
At rC (35) the data signal is converted into a tone signal based on the DTMF signal in the push-button dial telephone. This tone signal is sent from the slave station (20) via the cutter (28) and the protector (27) to the telephone station (22).
It is transmitted to the master station (21) via the public telephone line (24) via the exchange (23).

In the automatic receiving device (39) of the master station (21), the CPU
Under the control of (42), the line control unit (44) automatically switches the line, automatically detects a call from the automatic notification device (26), connects the line, and receives data signals from various sensors (25) for automatic notification. Automatically receive tone signals based on The tone signal based on this DTMF signal is DTMF/BC
It is converted into a BCD signal by the D converter (45), and when using the personal computer (40), it is converted into a BCD/R323 signal.
The signal is converted into an R3232C signal by the 2C converter (47) and output, and the information based on the various sensors (25) is data-processed by the personal computer (40). Also, when using the printer (41), the printer I/F section (
49), and information based on the various sensors (25) is printed by the printer (41).

In the present invention, the master station (21) reports information transmitted from the slave station (20) as described above through the non-voltage contact inputs of the various sensors (25). That is, the contact information pin from the slave station (20) has a 3-bit configuration of ON, 11 connected, and O1'F states, and the data signal from the slave station (20) is transmitted with the above bit configuration, and the data signal from the slave station (20) is transmitted with the above bit configuration. (21) is received.

In this master station (21), when a notification factor occurs due to contact input in the slave station (20) as shown in Figure 1 (A), at that point the ON and continuation beeps (a) (b) are turned on. , when the notification is completed, only the ON bit (a) falls and only the continuation bit (b) remains. Then, when the reporting factor disappears and returns to the initial state, at that point the continuation bin)
At the same time as (b) falls, the OFF bit (C) rises. In addition, the OFF beep will sound when the initial report is completed.
(C) falls. Therefore, if the ON and continuation bits (a) and (b) rise in the report data at the master station (21), it indicates the occurrence state of the 1119FA factor at the slave station (20), and the continuation bit (b) If only the OFF bit (C
) only rises, it indicates that the state is in a recovery state due to disappearance of the reporting factor.

In addition, as shown in FIG. 1(b), if the reporting factor in the slave station (20) returns immediately after the occurrence, the OFF bit ( C) rise occurs and ON and OFF beats (a) (c)
It turns out that the sensor (25) in the slave station (20) is malfunctioning in the rising state of .

Furthermore, as shown in Figure 1 (c), if the notification factor returns immediately after it occurs, and if it occurs again, the ON and continuation biff) (a) and OFF beep after the rise of (b)) (C) also occur. Rise, then ON, continue and OFF bits (a) (b
) and (c) are all found to be abnormal in the rising state.

In this way, as shown in Figure 1 (a), (b), and (c),
The slave station (2
0) is accurately recognized by the master station (21).

In the above embodiment, the slave station (20) and the master station (21) are one
Although the case of one pair has been described, the present invention is suitable for a case where a large number of slave stations (20) (20) are provided for one master station.

〔Effect of the invention〕

According to the method of the present invention, since the contact information bits of various sensors from the slave station are configured as 3 bits for ON, continuous, and OFF states, it is possible to send and receive small amounts of data using a simple and inexpensive means in terms of equipment. At the same time, various situations at the slave station can be accurately recognized by the master station, and simple data transmission and reception with high safety and reliability can be easily realized. This type of simple data transmission and reception is useful for automatic meter reading of gas, water, and electricity, monitoring of abnormalities in FA operation management, management monitoring of industrial systems such as temperature control of freezing and refrigeration equipment, safety management of sick people at home, fire alarms, etc. If applied to security systems, the effect will be great.

[Brief explanation of drawings]

1(a), 2(b), and 3(c) are explanatory diagrams showing each state of contact information bits in a slave station according to the method of the present invention, FIG. 2 is a schematic configuration diagram showing an example of an apparatus for implementing the method of the present invention, FIG. 3 is a block diagram showing a slave station of the device shown in FIG. 2, and FIG. 4 is a block diagram showing a master station of the device shown in FIG. FIG. 5 is a schematic block diagram showing an example of a conventional device for a data transmission/reception method. (20) -Slave station, (21)(24)・-Public telephone line, (25) (a)・-ON bit, (b) (C)・-OF"F bit. Master station, various sensors, # l! Continued focus, Fig. 4/3q

Claims (1)

[Claims] (1) A simple data transmission and reception method in which a tone signal based on a DTMF signal in a push-button dial telephone is transmitted from a slave station over a public telephone line, and the tone signal is received at a master station and converted to a BCD signal, A simple data transmission/reception method characterized in that contact information bits of various sensors from the slave station have a 3-bit configuration of ON, continuous, and OFF states.