JPS58179091A - Remote controller - Google Patents

Abstract

PURPOSE:To prevent an effect to a device when an error is supplied in a prescribed frequency and to improve the reliability of a remote controller with a simple circuit, by providing a safety logic means which inverts the storage contents in case the state of input signal is stored in different ways and in a prescribed frequency to a storage means of a remote control part. CONSTITUTION:The input signal given from a sensor means 18 of a device main body 1 is compared with a reference level signal 12 by an input signal deciding means 14 of a control circuit 6 at the side of the main body. Then a comparing signal 11 is fed to a primary control means 7. The result obtained from comparison between the input signal and the signal 12 due to the signal 11 is stored in a state storage means 19. When the contents stored previously in the means 19 are different from the result of decision which is supplied newly, the frequencies of difference are counted by a counter means 20. While the means 20 is initialized when no difference is produced between the contents of the means 19 and the new result of decision. When the means 20 counts a prescribed frequency, the contents of the means 19 are inverted by a safety logic means 21. Thus an effect is prevented to the main body 1 in case error input signals are produced continuously and in a prescribed frequency due to a transmission error, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control device for remotely controlling a device main body.

In particular, it concerns safety measures against erroneous input signals from the device itself caused by signal transmission errors, etc. It can be realized at low cost with a simple circuit configuration, and improves the reliability of remote control of home boilers, water heaters, etc. It is an attempt to do so.

Generally, boilers, water heaters, etc. for home use are installed outdoors or in places such as home machinery rooms, and there is inevitably a need for remote control from a living room such as the kitchen. .

By the way, the content of remote control of such household boilers, water heaters, etc. is to control heat sources such as burners by sensor signals such as thermistors installed on the device body, and the sensor signal is If an error occurs in the import, there is a fear that the purpose of controlling the equipment may not be achieved. In particular, the signal transmission distance may be several tens of meters, and it is thought that there is a high probability that transmission errors will occur, so it is desirable to have a remote control circuit with high redundancy against such sensor signal capture errors. It is something.

SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide a reliable remote control circuit with a simple circuit configuration and at low cost.

The present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram showing the circuit configuration of the present invention. 1
is the main body of the equipment such as a boiler, 2 is the tank, and 3 is the heat section. Reference numeral 4 denotes a remote control unit, which is connected to the main body side control circuit 6 via a data transmission line 6.

The remote control section 4 is equipped with a main control means 7, which controls the main body of the device via the data transmission line 5. By using a microcomputer as the main control means 7, a system with good cost performance can be realized.

The remote control unit 4 may also include a clock if necessary.

Numerical display 8 for displaying timer setting time, etc.
It is equipped with a lamp display 9 for displaying the status of the equipment, input means 10 for setting the clock, timer, etc., and setting the operating mode of the equipment.

The data transmission line 5 transmits signals such as a comparison signal 11, a reference level signal 12, and a heat source control signal 13. The contents of each will be described later.

Next, in the main body side control circuit 6, reference numeral 14 denotes a human input signal determination means, which is composed of a DA conversion circuit 15 and a comparison circuit 16. The DA conversion circuit 15 converts the reference level signal 12 (digital value) transmitted from the main control means 7 into a corresponding reference voltage (analog value). The comparison circuit 16 compares the input signal from the sensor means 18 such as a thermistor attached to the wall of the tank 2 with the reference voltage output from the D-A conversion circuit 16, and its output is compared. It is fed back to the main control means 7 as a signal 11. That is, the human power signal determining means 14
It is determined whether the input signal from the sensor means 18 is below a predetermined O reference voltage, and the result is "O" or "1".
becomes the comparison signal 11. Incidentally, as a human power signal source, a sensor means 18 is used in the implementation, but it is not limited to heat theory or kneading, but a switch or a transistor switch.

It may be a digital signal source such as a lamp output.

The comparison signal 11 is taken in by the main control means 7, passes through a safety logic means 21 which will be described later and is built into the main control means 7, and then its state is stored by the state storage means 19.

Next, I will clarify the situation regarding the safety exit/exit means 21.

FIG. 2 is a flowchart showing the function of the safety logic means 21. First, a comparison signal is taken in at 22, and a human input signal from the sensor means 18 is determined from the contents at 23.
It is determined whether 0" is 1". If the input signal is -1, then 2
In step 4, it is checked whether the status flag stored in the status storage means 19 is "0" or 1". Here, the status flag corresponds to the input signal, and indicates the previous status of the input signal. It is something I have memorized.

Therefore, if the status flag is -1 at 24, the counter means 2o built in the main control means 7 is set to a predetermined value at 25, 1=7.
Yalize. In other words, the route 23→24→25 stores the state of the newly captured input signal and the state storage means 1.
The states of the previous input signal sources stored in 9 are both “1”
, which constitutes one stable state.

Next, if the status flag is N1 at 24, the counter means 20 is counted at 27, and it is determined at 28 whether or not the count has reached a predetermined number of times. Until the specified number of times is reached,
There is no change in the status flag, and the status flag is inverted from "0" to "1" only after reaching a predetermined number of times.

That is, if the state of the newly captured input signal is different from the state of the previous human input signal source stored in the state storage means 19, the state of the input signal stored in the state storage means 19 is The content is changed to the opposite state.

23, the same logic applies to the human input signal N1. The status flag is identified at 26, and if the status flag is 1, the counter means 20 is initialized at 25. In other words, the route 23→26→25 is
The state of the newly captured input signal and the previous state of the input signal source stored in the state storage means 19 are both "1", that is, "O", and constitute the other stable state.

If the status flag is -1 at 26, the counter means 20 is counted at 27, and it is determined at 28 whether the count has reached a predetermined number of times. The status flag does not change until the predetermined number of times is reached, and after reaching the predetermined number of times, the status flag is inverted from "1" to "0".

Although the safety logic means 21 described in detail above can of course be constructed with pure hardware, it is more advantageous in terms of cost performance to construct it with software based on a microcomputer program.

Further, the state storage means 19 and the counter means 20 are constructed in the RAM section of the microcomputer.

Reference numeral 17 denotes a heat source control means, which controls the heat source section 3 according to the contents of the heat source control signal 13 transmitted from the main control means 7.

The contents of the lock and heat source control signal 13 are stored in the state storage means 19.
By configuring the main control means 7 to be determined by the state of the input signal source such as the sensor means 18 stored in the main control means 7, that is, by the state flag, the control of the heat source part 3 is controlled by the safety logic means 21. This can be done based on the input signal determination result with a high degree of redundancy.

Further, in the embodiment, the human power signal determining means 14 is provided in the main body side control circuit θ, but the present invention is not limited to this, and it can also be provided in the remote control section 4 side.

As described in detail above, in the present invention, the state of the input signal source transmitted from the device main body is stored in the state storage means 1.
The safety logic means 21 is constructed so that the contents of the state storage means 19 are inverted for the first time after the previous state of the human input signal source stored in the teaching tool is used a predetermined number of times in succession. It is possible to realize a highly reliable remote control circuit that does not affect the operation of the device at all unless erroneous human input signals occur a predetermined number of times in succession.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the circuit configuration of the present invention, and FIG. 2 is a partial functional flowchart. 1...Device body, 4...Remote control section, 6
...data transmission line, 7...-main control means, 14 human power signal determination means, 19...state storage means, 20.
... Counter means, 21 ... Safety logic means.

Claims (3)

[Claims] (1) A remote control section for remotely controlling the main body of the device, a main control means installed in the remote control section for controlling the device, a data transmission line connecting the main body of the device and the remote control section, and a main control section 1+111 for the main body of the device. input signal determining means for giving a binary state such as "0" or "1" to a certain input signal depending on whether or not it is below a predetermined reference level; , the input signal '1'4
] state storage means for storing the judgment result by the fixed means, and when the content of the state storage means and the new judgment result by the human power signal judgment means are different, counting is advanced; when they are equal, the count is initialized to a predetermined value; The remote control device 11 has a safety logic means for inverting the stored contents of the state storage means only after a predetermined number of consecutive counts have been counted by the counter means. (2) The remote control device according to claim 1, which controls equipment based on the contents stored in the state storage means. (3) A microconbeater is used as the main control means, the state storage means and the counter means are configured in the RAM of the microconbeater, and the algorithm of the safety logic means is realized by a control program. Remote control device as described in Section.