JPH0728789Y2 - Contact input information transmitter - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention represents, for example, the operating status of building equipment (refrigerator, water tank) of a building or condominium, and the presence / absence of a failure in two positions (1 bit). Related to the contact input information transmission device used for remote monitoring of the operating status of building equipment and the presence or absence of failure by transmitting each contact input information consisting of The present invention relates to an improvement in such a contact input information transmitting device that responds only to changes in contact input information.

<Prior Art> Conventionally, in this type of contact input information transmission device, the contact input information of two positions regarding the equipment operating state such as water tank full, water pump operating, and the presence / absence of failure of the refrigerator, etc. is received, and For example, in the case of transmitting by code transmission to a receiving device via a transmission line such as a subscriber telephone line, the time when any one of a large number of contact input information occurs, in other words, the device operating state and the failure described above. It has always been the case that the code transmission is performed only when the contact state at the two positions corresponding to the presence or absence of any of the input information changes from the generation direction to the input information, typically from "0" to "1".

That is, in response to a change in the state of any one of the input contacts from "0" to "1", the communication control device including the automatic dial device is activated, and when the subscriber telephone line is used,
The exchange in the line is operated to secure a transmission path to the receiving device, and then the transmission control device performs predetermined code communication with the receiving device via the transmission line to establish a data link. Then, the transmission code corresponding to the generated contact input information is placed on the established data link and transmitted to the receiving device, and thus remote monitoring of building equipment and the like is performed.

<Problems to be solved by the invention> However, in such a conventional contact input information transmitting device, code transmission is started when the state of each input contact changes in one direction. Therefore, depending on the nature of the contact input information to be monitored, it may not be possible to automatically start code transmission at the time of its restoration and disappearance, which may be inconvenient for the monitoring operation on the receiving device side. .

For example, when remotely monitoring the full water condition of the receiving tank, even if the receiving device issues an alarm when the full water condition is detected, generally regarding the receiving tank water level, the operation of the water supply system inside the tank and the outside of the tank Since it depends on the equilibrium with the operation of the water supply system, the temporary failure of the equilibrium is naturally resolved and the alarm disappears in a very short period of time, or the alarm itself continues for a while. However, in the meantime, if the operator manually resets the water level detection device in the water tank on the transmission device side, the alarm disappears in many cases. And in any of the above cases, it is required that the disappearance of the alarm can be confirmed on the receiving device side, otherwise, in the former case, it will induce excessive maintenance attendance, and in the latter case, In the case, it is necessary to confirm and inspect at the site of the manual reset implementation, and in any case, there is a problem that it is uneconomical in terms of maintenance man-hours.

<Means for Solving Problems> Therefore, in the present invention, in view of the problem of uneconomical maintenance and man-hours in the above-mentioned conventional device, generation and disappearance of contact input information, that is, from “0” to “1” direction. Information change to "1"
In response to both the information change from "0" to "0", the change signal is obtained by the bidirectional information change detecting means having an extremely simple circuit configuration and the code transmission is performed, so that it is significant depending on the nature of the contact input information. By transmitting the code corresponding to the information change from a certain "1" to "0" without leaking, the above problems can be solved and the disappearance of the alarm can be immediately monitored remotely. It is intended to provide an excellent contact input information transmission device which is much more economical.

<Operation> In the configuration of the present invention, as shown in FIG. 1, the bidirectional information change detecting means 6, 7, 8, 9, and 10 relate to one contact input information in the direction from “0” to “1”. Both the information change of 1 and the information change from the “1” to the “0” direction are detected, and the voltage is suspended to the power supply voltage via the current limiting elements 7 and 8, and in accordance with the information change, the connection element 6, Node grounded via 6c
Two capacitors 9 and 10 each having one end connected to 6b and 6a respectively output the change signals S9 and S10 from the other ends, and in response thereto, the code sending means 11 and 14 change the signals. It acts to send the corresponding code onto the transmission line. Therefore, returning to the operation example described above, when the contact input information regarding the full state of the water receiving tank is supplied to the contact input information transmitting device of the present invention, both the full state of the water receiving tank and its cancellation are different. To be monitored remotely.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, a water tank 1 is filled with water W, and a ball tap valve 3 that is driven to open and close by a ball tap 3a is attached to the tip of a water supply pipe 2 that faces the water tank 1 from above. The water supply pipe 4 extends from the lower end of the water receiving tank 1 to a load (not shown).

A publicly known water level detector 5 is arranged at the peripheral portion of the water receiving tank 1, and a water level probe 5a is hung from the detector 5 so as to face the water W in the water receiving tank 1. The power supply side of the input relay 6 is connected to the power supply line L1, and the ground side of the relay is connected to a power supply such as ground via a make contact 5b of a detection relay (not shown) provided inside the water level detector 5. To the line.

One end of a resistor 7 and a resistor 8 as current limiting elements are connected to the power supply line L2, and the other end of each of the resistors 7 and 8 is specially fixed in that order in a fixed manner on the break side of the input relay 6. Contact 6b
And the fixed contact 6a on the make side. The movable contact 6c of the relay 6 is connected to a power source return line such as ground, and the movable contact 6c selectively connects the break side fixed contact 6b and the make side fixed contact 6a to the power source return line. By switching and connecting, the input relays 6 and 6c constitute a connection element.
Between the other end of the resistor 7 and the fixed contact 6b on the break side is the contact.
6b is relayed and branched via the capacitor 9, and similarly between the other end of the resistor 8 and the fixed make-side contact 6a is relayed and branched at the contact 6b and via the capacitor 10, which is a normal data transmission device. It extends to 11 change signal input terminals.

Here, the input relay 6, the resistors 7 and 8 and the capacitors 9 and 10 cooperate with each other to form a bidirectional information change detecting means. The cathode of the diode 12 is connected to the branch point of the capacitor 9 on the data transmission device 11 side, and similarly, the cathode of the diode 13 is connected to the branch point of the capacitor 10 on the data transmission device 11 side. 12,
The anodes of 13 are commonly connected and extend to the communication control device 14. The communication control device 14 and the above-described data transmission device 11 constitute a code sending means.

The operation of the above configuration will be described below with reference to the waveform diagram of FIG.

The water W in the water receiving tank 1 is pumped into the water pipe 4 and supplied to the load by using its potential energy or a pump (not shown). During this time, the ball tap 3a follows the lowering of the water level. In response to this, the ball tap valve 3 opens in response to this, and water is supplied into the water receiving tank 1 via the water supply pipe 2. Therefore, normally, the ball tap valve 3 is normally opened and closed depending on the load. By the operation, the water level of the water W in the water receiving tank 1 rises and falls between predetermined upper and lower limit water levels.

However, if the opening / closing operation of the ball tap valve 3 becomes unsuccessful for some reason such as the entry of suspended matter into the ball tap mechanism, the water level in the water receiving tank 1 rises above the upper limit water level in the continuous opening / closing operation, and In this case, it is required to detect that the water level has risen to the full water level above the upper limit water level as a full water state and to remotely monitor this state. That is, the water receiving tank 1
When the water level inside rises to the full water level and comes into contact with the water level probe 5a, normally, by using the formation of a return circuit from the probe 5a into the water W in the water tank 1, The water level detector 5 detects the full water state and excites the internal detection relay, thereby closing drive the make contact 5b. Then, the input relay 6 is excited (FIG. 2 (a) a), and the movable contact 6c comes into contact with the fixed make contact 6a on the make side.
The contact 6a that was pulled up to the positive power supply voltage of L2
The electric potential of is jumped to the ground potential via the movable contact 6c, and the jumped potential drop is applied to the contact 6a side terminal of the capacitor 10.

However, the voltage between both terminals of the capacitor 10 is the power line L2.
~ The capacitor to be equal to the power supply voltage between ground
For the charge stored in 10, this suddenly
Since it cannot be increased or decreased (that is, the voltage between both terminals of the capacitor 10 cannot change sharply), the fixed contact 6a of the capacitor 10
The jumping potential drop at the side terminal appears as it is at the data transmission device 11 side terminal of the capacitor 10 (FIG. 2 (b) b).

Then, after that, the charge accumulated in the capacitor 10 is discharged toward the ground of the data transmission device 11, and the capacitor is discharged.
The jumping potential drop appearing at the data transmission device side terminal of 10 is restored toward the ground (FIG. 2 (b) c), and as a result, the negative differential pulse is changed signal S10 as data transmission device 1
It is supplied to one input terminal (for example, the first channel).
During this period, the fixed contact 6b is released from the ground, so that the fixed contact 6b side terminal is pulled up to the positive power supply voltage of the power supply line L2 via the resistor 7, and the capacitor 9 is eventually It is charged until the voltage between both terminals becomes equal to the power supply voltage between the power supply line L2 and the ground, and it stands by.
Is also true.

Here, returning to the operation of the water level detector 5, after the water level in the water receiving tank 1 reaches the full water level, for example, a suspended matter that has entered the ball tap mechanism is naturally excreted, or As a result of the water level detector 5 being reset by the operator, the detection relay inside the detector 5 is de-excited, and its make contact 5b turns open, and the input relay 6
Is de-excited (Fig. 2 (A) d), and when its movable contact 6c returns to the break contact 6c and comes into contact with it, this time, with respect to the capacitor 9, the operation leading to the occurrence of the jumping potential drop described above is completely eliminated. The same operation is ensured, whereby another negative differential pulse (e in FIG. 2 (C)) is used as the change signal S9, and another input terminal of the data transmission device 11 (for example, the second channel).
Is supplied to.

Then, the two negative polarity differential pulses (FIG. 2 (B) bc, FIG. 2 (C) e) derived from the capacitors 9 and 10 generate the two diodes 12 and 13 which operate as a normal diode OR circuit. After passing separately, the OR (logical sum) pulses of both differential pulses (f, g in FIG. 2 (D)) are supplied to the input terminal of the communication control device 14.

Thus, a differential pulse is supplied simultaneously with each bidirectional information change of generation and disappearance of contact input information (Fig. 2 (D)).
In response to f and g), the publicly-known public communication control device 14 performs communication control such as exchange operation, and at the time of each such information change, a change signal S1 supplied separately corresponding to the change.
In response to the differential pulse (FIGS. 2 (B) and 2 (C)) as 0 and S9, the publicly-known public data transmission device 11 performs normal transmission control, so that the data is transmitted via the transmission line 15. Codes corresponding to the above-described specific change signals S9 and S10 are sent to the receiving device, whereby bidirectional information changes can be remotely monitored on the receiving device side.

<Effect> As described above, according to the present invention, for one contact input information, bidirectional information change, that is, information change from “0” to “1” direction and “1” to “0” direction. Both of the information changes are detected and hung up on the power supply voltage via the current limiting elements 7, 8, and in accordance with the information changes the connecting element 6,
Bidirectional information change detecting means 6 for outputting change signals S9, S10 from the other ends of the two capacitors 9, 10 having one ends respectively connected to the nodes 6b, 6a installed via 6c. , 7, 8, 9, and 10 are attached, the configuration for sending the code corresponding to each change signal generated at each bidirectional information change to the transmission line is made extremely simple. By simply adding an extremely simple circuit configuration without adopting a microprocessor processing, for example, when the detection of the full state of the water tank and the detection of the disappearance of the full state can be remotely monitored separately, By suppressing excessive on-site dispatch and omitting on-site inspections such as confirmation of reset operation, the excellent effect of further improving the economical efficiency in terms of maintenance management man-hours is achieved.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a circuit block diagram showing the configuration thereof, and FIG. 2 is a waveform diagram of a main part. 1 ... Water tank, 2 ... Water supply pipe 3 ... Ball tap valve 4 ... Water supply pipe, 5 ... Water level detector 6 ... Input relay, 7, 8 ... Resistor 9, 10 ... Capacitor 11 ... Data transmission device 14 ... Communication control device

Claims (2)

[Scope of utility model registration request] 1. A contact input information transmitting device which responds to a plurality of contact input information, establishes a transmission path, and sends a code corresponding to the contact input information to the transmission path. Bidirectional information change detecting means 6, 7, 8 for detecting both the information change from the "1" to the "0" direction and the information change from the "0" to the "1" direction and outputting the change signals S9, S10. , 9 and 10 and code sending means 11 and 14 for sending the code corresponding to the change signals to the transmission line in response to the change signals S9 and S10. , 1st node 6b corresponding to “0” and “1” of contact input information
And the second node 6a are selectively connected to the power return line, the connection element 6 and the first current having one end connected to the power line L2 and the other end connected to the first node 6b. The limiting element 7 and one end thereof is connected to the first node 6b and the other end thereof is the code transmitting means 1
A first capacitor 9 connected to the change signal S9 input terminals 1 and 14, and a second current limiting element 8 having one end connected to the power supply line L2 and the other end connected to the second node 6a, One end is connected to the second node 6a and the other end is the code sending means 1
1. A contact input information transmitting device comprising a second capacitor 10 connected to the change signal S10 input terminals 1 and 14. 2. The bidirectional information change detecting means switches and connects the break side fixed contact 6b and the make side fixed contact 6a to the power return line in response to "0" and "1" of the contact input information. Input relay 6 having a movable contact 6c, one end of which is connected to the power supply line L2, and the other end of which is a fixed contact on the break side.
A first resistor 7 connected to 6b; a first capacitor 9 having one end connected to the break side fixed contact 6b and the other end connected to the change signal S9 input terminal of the code sending means 11 and 14; One end is connected to the power supply line L2, and the other end is the fixed contact 6a on the make side.
Practical use of a second resistor 8 connected to the second capacitor 10 and a second capacitor 10 having one end connected to the make-side fixed contact and the other end connected to the change signal S10 input terminal of the code sending means 11 and 14. Contact input information transmission device according to claim (1) of the new model registration claim.