JPH0628871Y2 - Contact input information transmitter - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is, for example, two positions (1 bit) indicating the operating state of a building, a condominium building facility (refrigerator, water tank water supply pump), or the like. By transmitting each contact input information represented by) to a remote receiving device via a transmission line, a contact input information transmitting device used for remote monitoring of the operating state of building equipment and the presence or absence of failure. In particular, the present invention relates to an improvement in such a contact input information transmitting device that responds only to the simultaneous existence of a plurality of predetermined contact input information.

<Prior Art> Conventionally, this type of contact input information transmission device receives contact input information of two positions regarding equipment operating states such as water tank full, water pump operating, etc. and presence / absence of failure of refrigerator, etc. For example, in the case of transmitting by code transmission to a receiving device via a transmission line such as a subscriber telephone line, when any one of a large number of contact input information is generated, in other words, the device operating state described above, It has been customary to carry out code transmission when the contact state at the two positions corresponding to the presence or absence of a failure changes with respect to any input information.

That is, in response to a change in the state of any one of the input contacts,
When the communication control device including the automatic dial device is activated and the subscriber telephone line is used, the exchange in the line is operated to secure the transmission path to the receiving device, and then the transmission control device A predetermined code communication is performed with the receiving device via the transmission path to establish a data ring, and then the transmission code corresponding to the generated contact input information is placed on the stochastic data link and transmitted to the receiving device. However, the remote monitoring of building equipment was thus performed.

<Problems to be Solved by the Invention> However, in such a conventional contact input information transmitting device, code transmission is started when any one of the input contacts changes in state. Therefore, depending on the nature of the contact input information to be monitored, unnecessary code transmission frequently occurs, and in addition, signal processing in the receiving device is often meaninglessly complicated.

To give an example here, the water pressure in the water pipe connected to the discharge port of the pump is naturally at a very low value when the pump is not operating. When monitoring whether the water pressure has dropped abnormally due to a pump failure or damage to the water pipe itself, the water pressure in the water pipe should be monitored only while the pump is operating. In this case, it can be said that the water pressure of the water pipe when the pump is not operating is information that does not match the monitoring target, that is, information that does not need to be transmitted to the receiving device.

However, in the information device, the contact input information indicating the operating state of the pump and the contact input information indicating the abnormal pressure drop in the water pipe are processed as independent ones, and a change in one of the contact input information occurs. In response to this, the code transmission is started, so even if the pump is in the operation stop state, the state of the abnormal decrease in the water pressure in the water pipe is code-transmitted,
Moreover, at the receiving device side receiving such a code, at that time, the operating state of the pump stored therein is confirmed, and by comparing with this, whether the received abnormal pressure drop state is meaningful information or not. You will have to decide whether.

Thus, in such a conventional device, the utilization rate of the transmission path is poor due to the meaningless increase in the code transmission frequency as a whole (when other information is multiplexed, the transmission of other information is restricted). Moreover, since the receiving device processes the discrimination signal, the device becomes complicated and the cost becomes high.

<Means for Solving Problems> Therefore, the present invention provides simultaneous supply of a plurality of preselected contact input information in view of the problems such as the utilization rate of the transmission line in the conventional device and the complication of the device. In response to this, by transmitting the code, the meaningful contact input information is discriminated by the transmitting device side, and only the corresponding code is transmitted, thereby solving the above-mentioned problems and increasing the utilization rate of the transmission path. , Providing an economical contact input information transmission device with a simple structure, and in addition to this, when the duration of simultaneous supply of a plurality of preselected contact input information is equal to or longer than a predetermined reference duration. Only by performing code transmission, a contact input information transmission device having high operation stability is provided.

<Operation> As shown in FIG. 1, when the simultaneous detection means 12 detects the simultaneous supply of a plurality of preselected contact input information and outputs the simultaneous signal S12, the operation of the present invention is as follows. In response, the code sending means 14 acts so as to send the code corresponding to the simultaneous signal S12 to the transmission line, and further, as shown in FIG. The detection means 16 and 17 determine the duration, and when it is equal to or longer than a predetermined reference duration, the simultaneous continuation signal S17
Is sent to the code sending means 14 so that the code corresponding to the simultaneous continuation signal S17 is sent to the transmission path. Therefore, returning to the example described above, if both the “pump operating state” and the “abnormal decrease in water pressure in the water pipe” are treated as contact input information of the simultaneous supply detection target of the simultaneous detection signal 12, Even if there is an abnormal drop in water pressure when the pump is not operating, meaningless code transmission is not performed.

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

A pump 2 driven by an electric motor 1 is installed, a water supply pipe 3 connected to its discharge port extends toward a load (not shown), and a pressure detector is provided at a proper position near the pump of the water supply pipe 3. 4 are provided. A three-phase power supply line 5 is introduced into the electric motor 1, and a make contact 6a for opening and closing a power supply is inserted in the power supply line 5, and this contact 6a is an electromagnetic switch 6 of a manual operation 7. It is an interlocking contact driven by. One end of each of a resistor 9 and a resistor 10 is connected to the DC power supply line 8, and the other end of the resistor 9 reaches the ground via an auxiliary break contact 6b for driving the electromagnetic switch 6, and one resistor The other end of 10 reaches the ground via a break contact 11b driven by a relay 11 attached to the pressure detector 4.

The ground side ends of the resistors 9 and 10 are 2 and
It is connected to one input terminal and constitutes a simultaneous detection means. The output terminal of the AND gate 12 is connected to the input terminal of the monostable multivibrator 13, and the output terminal of the multivibrator 13 is connected to a general data transmission device 14 as a code sending means, In many cases, a communication control device having an automatic dial function for operating an exchange in a subscriber telephone line and a transmission control device for controlling code transmission are included, and its output terminal is a transmission line 15 It is connected to the.

In the above structure, when the electromagnetic switch 6 is excited by the manual operation 7, the make contacts 6a of the electromagnetic switch 6 are simultaneously closed (second
As shown in Fig. (A) a), the electric motor 1 is supplied with power via the contact 6a in the closed state, and the pump 2 is in the operating state.
Water is pressure-fed from the discharge port of the pump 2 into the water supply pipe 3, and the water pressure there is maintained at a normal value during operation to reach a normal operation state.

However, if the water pressure in the water supply pipe 3 drops below a preset lower limit value for some reason, such as a failure of the pump 1 or damage to the water supply pipe 3 itself, the pressure detector 4
Detects an abnormally low pressure state and excites the relay 11.
Then, it was closed until now, and gate
By grounding one of the input terminals of 12, the break contact 11b, which supplies "0" to the input terminal and robs the output opportunity of "1" from the AND gate, is driven by the relay 11 to open. Therefore, one input terminal of the AND gate 12 is a resistor
The voltage of the power supply 8 is maintained via 10 and "1" is supplied thereto (FIG. 2 (b) b), and as a result, an output opportunity of "1" from the AND gate 12 is secured.

At this time, in the above-described operation example, since the pump 2 is in the operating state and driven by the electromagnetic switch 6 to open the auxiliary brake contact 6b, the other input terminal of the AND gate 12 is also opened. "1" is supplied (Fig. 2 (A)
a). Therefore, in this case, the AND gate 12 receives the supply of both input terminals “1” (see FIG. 2 (A) a,
(B) b), "1" is output as the simultaneous signal S12 (Fig. 2).
(C) c) and the subsequent monostable multivibrator 13 is triggered to shift it to a metastable state (Fig. 2 (D) d).

Thus, in response to the transition of the monostable multivibrator 13 to the metastable state, the publicly known data transmission device 14
Performs normal communication control and transmission control,
A code corresponding to the above-mentioned specific simultaneous signal S12 is sent out to the receiving device via this, whereby the water pressure in the water pipe 3 is abnormally lowered during the operating state of the pump.
The remote monitoring can be performed on the receiving side by only transmitting the code once.

Subsequently, a second embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

The output terminal of the AND gate 12 is a retriggerable monostable multivibrator 16 (a monostable multivibrator that newly measures the metastable period from the point when it receives a trigger pulse during the metastable period, and various known Is connected to the input terminal of the multivibrator 16
Is connected to the inhibit input terminal of the inhibit gate 17, the other input terminal of the gate 17 is connected to the output terminal of the AND gate 12, and the output terminal of the inhibit gate 17 is The stable multivibrator 13 follows. The retriggerable monostable multivibrator 16 and the inhibit gate 17 constitute a simultaneous signal continuation determining means. The other components are the same as those denoted by the same reference numerals in FIG.

In the above configuration, assuming that the water pressure in the water supply pipe 3 is abnormally lowered during the operating state of the pump, as in the above-described operation example, both input terminals of the AND gate 12 have
"1" is supplied (Fig. 4 (A) a, Fig. 4 (B) b), and "1" as the simultaneous signal S12 is output from its output terminal (Fig. 4 (C)). c).

Triggered by "1" of the simultaneous signal S12, the retriggerable monostable multivibrator 16 shifts to a metastable state (Fig. 4 (D) d) and remains in that state for a preset reference duration τ. In other words, the reference continuation period is clocked, and the stable state is restored at the end of the clocking operation (Fig. 4 (D) e). During the reference continuation period, the inhibit gate 17 receives the "1" from the monostable multivibrator 16 at its inhibit input terminal, and the inhibit gate 17 performs the prohibition operation. That is, in the meantime, from AND gate 12 to inhibit gate
Simultaneous signal S12 "1" supplied to the other input terminal of 17
Regardless of "0", the gate 17 outputs "0" and cuts off the supply of the trigger pulse to the subsequent monostable multivibrator 13.

Then, if the simultaneous signal S12 is still present after the elapse of the reference continuation period τ, at that time, the inhibit input terminal of the inhibit gate 17 has the stable monostable multivibrator 16 restored. Since "0" is supplied (Fig. 4 (D) f), the gate 17 is released from the prohibition operation, and the simultaneous signal S12 is guided to the monostable multivibrator 13, whereby the multivibrator 13 is released. To a metastable state (Fig. 4 (E))
g). Thus, the data transmission device 14 is activated in response to "1" from the monostable multivibrator 13, as in the case of the embodiment shown in FIG.

However, suppose that the duration of the simultaneous signal S12 is short and short, and the simultaneous signal S1
When 2 disappears, for example, the abnormal drop of the water pressure in the water supply pipe 3 is eliminated in a short time, and the break contact 11
When b returns to the closed state (Fig. 4 (B) h), the simultaneous signal S12 is also inverted to "0" at that time (Fig. 4).
(C) i), the simultaneous signal S12 disappears and becomes “0” at the release time point of the inhibit operation by the inhibit gate 17 (FIG. 4 (D) f) (FIG. 4 (C) j), The monostable multivibrator 13 does not enter the metastable state (Fig. 4 (E)).
k).

Therefore, in this case, no code is transmitted.

On the other hand, another operation example will be described below. While the pump is operating (Fig. 5 (A) a), an abnormally low water pressure in the water pipe 3 is detected, and the break contact 11b is opened (Fig. 5 (B) b). S12 once turned to "1" (5th
After the figure (C) c), the break contact 11b closes and returns without waiting for the reference continuation period τ to elapse (FIG. 5 (B) d), and the simultaneous signal S12 also becomes "0" again accordingly. After the change (Fig. 5 (C) e), after all, meaningless contact input information that is not linked to the code transmission is added, the abnormal decrease in the water pressure in the water supply pipe 3 is detected again, and the break contact 11b is When opened (Fig. 5 (B) f), the simultaneous signal S12 from the AND gate 12 is again
It shifts to "1" (Fig. 5 (C) g), but in this case, the subsequent retriggerable monostable multivibrator 16 outputs the simultaneous signal S12.
When the "1" is inverted again (Fig. 5 (C) g), it is re-triggered (Fig. 5 (D) h), and the reference duration τ is measured depending on the metastable period starting from that point, At the end of timing of the period (Fig. 5 (D) i), the subsequent monostable multivibrator 13
Is triggered (Fig. 5 (E) j).

<Effect> As described above, according to the present invention, simultaneous supply of a plurality of preselected contact input information is detected, and the simultaneous signal S12 is detected.
By installing the simultaneous detection means 12 that outputs
By adopting a configuration in which the code corresponding to S12 is sent to the transmission path, for example, a decrease state of water pressure in the water supply pipe 3 while the pump is stopped is detected as an abnormally decreased state of water pressure, and meaningless code transmission is performed. Since it is possible to omit useless operations such as performing the above, it is possible not only to significantly improve the utilization efficiency of the transmission path, but also to eliminate the need for signal processing on the receiving device side to discriminate and remove meaningless information. Therefore, the device configuration is simplified as a whole, and the excellent effect that the cost can be reduced is achieved.

[Brief description of drawings]

1 and 2 relate to a first 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. FIGS. 3 to 5 relate to the second embodiment of the present invention, FIG. 3 is a circuit block diagram showing the configuration, and FIGS. 4 and 5 are waveform diagrams of the main part. 1 ... Electric motor, 2 ... Pump, 3 ... Water pipe, 4 ... Pressure detector, 6 ... Electromagnetic switch, 11 ... Relay, 12 ... AND gate, 13 ... Monostable multivibrator, 14 ... Data transmission device 16 …… Retriggerable monostable multivibrator 17 …… Inhibit gate

Claims (2)

[Scope of utility model registration request] 1. A contact input information transmitting device which establishes a transmission path in response to a plurality of contact input information and sends out a code corresponding to the contact input information to the transmission path. Detects simultaneous supply of information and provides simultaneous signal
Contact input information transmission characterized by including a simultaneous detection means 12 for outputting S12 and a code transmission means 14 for transmitting a code corresponding to the simultaneous signal to a transmission path in response to the simultaneous signal S12. apparatus. 2. A contact input information transmitting device which establishes a transmission path in response to a plurality of contact input information and sends out a code corresponding to the contact input information to the transmission path. Detects simultaneous supply of information and provides simultaneous signal
Simultaneous detection means 12 that outputs S12, and the duration of the simultaneous signal is timed, and when it is determined that the duration is equal to or longer than the preset reference duration, the simultaneous signal continuation that outputs the simultaneous continuation signal S17 is performed. Discriminating means 16, 17 and simultaneous continuation signal S17
And a code transmission means (14) for transmitting a code corresponding to the simultaneous continuation signal to a transmission line in response to the contact input information transmission device.