JPH08250001A - Ratch relay, its malfunction prepentive circuit and burglar alarm control device - Google Patents

Abstract

PURPOSE: To detect malfunction at once and to reset to the normal condition, when malfunction is generated in a ratch relay. CONSTITUTION: Ratch relays 5 and 6 have poles 5O and 6O for output operated by the input signal for setting or resetting; and poles 5M and 6M for monitoring output signals according to the output condition, interlocking systematically to the movable contacts 5O3 and 6O1 of the poles 5O and 6O for output. An MPU 16, a monitoring, means monitors the output condition of the poles 5M and 6M, and the output condition which input signal for either setting or resetting is output to the poles 5O and 6O, and when the ratch relays 5 and 6 generate an error operation, the MPU 16 outputs an input signal at once to the ratch relays 5 and 6, to reset to the normal operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latching relay that holds an operating state until a reset input signal is applied when a set input signal is applied, a circuit that prevents malfunction of the latching relay, and a circuit using these circuits. The crime prevention control device.

[0002]

2. Description of the Related Art Generally, in a latching relay, when a large vibration or shock is applied, the relay contact may be inverted and the state as it is may be erroneously operated. It is desired to restore the normal state.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and when a latching relay malfunctions, it can be immediately detected and returned to a normal state. The purpose is to

[0004]

In order to achieve the above-mentioned object, the present invention is constructed as follows.

That is, the latching relay of the present invention is
The movable contact is provided with at least two poles mechanically interlocking with each other, one pole being an output pole operated by a set or reset input signal, and the other pole being a monitor signal according to its output state. It is used as a monitor pole for output.

A latching relay malfunction prevention circuit according to the present invention comprises:
The output state of the monitor pole and the output state of whether the set signal or the reset input signal is output to the output pole are monitored, and when the two output states do not correspond to each other, the input signal is latched. And a monitoring unit that outputs the data to a relay to make the two output states correspond to each other.

The monitoring means may be composed of a microcomputer.

Further, the crime prevention control device of the present invention drives the alarm output relay to issue an alarm when abnormal vibration or abnormal temperature is detected based on the output of at least one of the vibration sensor and the temperature switch. In addition, the alarm output relay is configured by the latching relay of the present invention having the above-mentioned configuration, and the monitoring means having the above-described configuration is provided.

[0009]

In addition to the output pole, the latching relay of the present invention has a monitor pole that mechanically interlocks with the movable contact of the output pole and outputs a monitor signal according to the output state. , Based on the monitor signal of this monitor pole,
The output state of the output pole can be grasped.

The latching relay malfunction prevention circuit of the present invention outputs the latching relay of the present invention, the output state of the monitoring pole of the latching relay, and either a set or reset input signal to the output pole. If the output state does not correspond,
Since it has a monitoring means for outputting the input signal to the latching relay, when the latching relay malfunctions due to vibration or shock, that is, when the two output states do not correspond to each other, the input signal is immediately output to the latching relay. Can be restored to a normal state.

The crime prevention control apparatus of the present invention drives an alarm output relay to issue an alarm when abnormal vibration or abnormal temperature is detected based on the output of at least one of a vibration sensor and a temperature switch. In addition, since the alarm output relay is configured by the latching relay of the present invention having the above configuration and the monitoring means having the above configuration is provided, when the latching relay that is the alarm output relay malfunctions, the alarm output relay is immediately corrected to normal. It can be returned to the normal state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of a crime prevention system using a crime prevention control apparatus 1 having a latching relay malfunction prevention circuit according to an embodiment of the present invention.

The security system of this embodiment is, for example, A
This is for preventing theft of TM or CD, and the crime prevention control device 1 is connected with a vibration sensor 2 for detecting an abnormal vibration when a destructive work is performed by a drill, a hammer or the like, and a burner. A temperature switch 3 is connected to detect an abnormal temperature when the destruction work of the burnout is performed. Further, the temperature sensor 4 for controlling the cooling fan 10 is connected. Together with the vibration sensor 2, the temperature switch 3 and the temperature sensor 4, the crime prevention control device 1
Is placed in a protective chest of ATMs and CDs.

In the security mode, the security control device 1
An abnormality from the vibration sensor 2 or the temperature switch 3 is detected and an output is given to the first and second alarm output relays 5 and 6 according to the present invention, and the temperature of the temperature sensor 4 is compared with a set temperature described later. Output to the fan control relay 7.

The output of the first alarm output relay 5, which is composed of a latching relay as described later, is, for example, a telephone line 8.
The output of the second alarm output relay 6 which is also provided to the notification communication means such as
It is given to alarm means such as buzzer 9 and fan control relay 7
Is output to the cooling fan 10.

Although two alarm outputs are provided in this embodiment, it is needless to say that one or more alarm outputs may be provided as another embodiment of the present invention. .

In the crime prevention control apparatus 1 of this embodiment, in order to prevent the alarm output from being output due to the vibration when the door of the protection chest in which the apparatus is built is opened or closed at the time of maintenance, the door operation is linked with the door key operation. A door switch 11 for detecting opening / closing is connected.

This crime prevention control device 1 includes detection circuits 12 to 15 to which outputs of the above-described sensors 2 and 4 and switches 3 and 11, respectively, an MPU 16 as a control unit for controlling each unit, and a power supply. Is connected to the DC power supply 17 from the device on the side, and a power supply circuit 18 that supplies power to each unit, a liquid crystal display unit 19 for time display and operation status display, and start time and end time of cooling fan control are set. Time setting switch 20, a test switch 21 for setting a test mode described later, a cooling fan temperature setting switch 22 for setting the control temperature of the cooling fan 10, and a vibration level setting switch 23 for setting the vibration level of the vibration sensor 2. And the above-mentioned first and second alarm output relays 5, 6
And a fan control relay 7.

FIG. 2 is a front view of the crime prevention control device of FIG. 1, FIG. 3 is a front view with a part thereof cut away, and FIG. 4 is a side view thereof.
5 is a bottom view thereof, and FIG. 6 is a vertical side view thereof.
The same reference numerals are attached to the portions corresponding to.

The security control device 1 of this embodiment includes a substrate 2 on which electronic parts and the like are mounted as shown in FIGS. 3 and 6.
4 has a case 25 with a built-in
A lid 27 as a terminal cover that covers the rectangular opening 26 on the lower front side is detachably attached by a knurled screw 28.

The case 25 and the lid 27 are made of, for example, SUS, and the upper and lower edges of the front of the case are
Two mounting holes 29 for mounting the crime prevention control device 1 at a required position of the protection chest are formed.

In the area on the left side above the front of the case, there is a power supply display LED 30 that lights up when power is supplied,
The above-mentioned liquid crystal display unit 19 for displaying time and operating state
And time setting LEDs 31 to 33 are arranged.

The liquid crystal display unit 19 for displaying the time and the operating state displays the time in the time setting mode of the cooling fan, and detects the abnormal vibration, the abnormal temperature and the test mode described later, respectively. Make the corresponding display. The time setting LEDs 31 to 33 include an LED 31 that is turned on when the current time is set, an LED 32 that is turned on when the control start time of the cooling fan 10 is set, and an LED 33 that is turned on when the control end time of the cooling fan 10 is set.

In the area on the right side above the front of the case, the above-mentioned vibration level setting switch 23, which is a thumb rotary switch, and two thumb rotary switches 22 are also provided.
The above-described cooling fan temperature setting switch 22 including a and 22b is arranged. These thumb rotary switches 22 and 23 are provided so that the operating projections do not project from the front of the case 25 so that they are not inadvertently operated.

The vibration level set by the vibration level setting switch 23 for setting the vibration level detected by the vibration sensor 2 can be set in the range of 0 to 9, and the sensitivity becomes better as the value increases, and even a small vibration can be obtained. Operate. It should be noted that the vibration level 0 is used only during maintenance without detecting the vibration, and is normally set within the range of the vibration levels 1 to 9.

When the control temperature set by the cooling fan temperature setting switch 22 is exceeded, the cooling fan 10 is driven, and when the temperature falls below the control temperature by about 5 °, the cooling fan 1
The drive of 0 is stopped.

When the lid 27 on the lower front side of the case 25 is removed, as shown in FIG. 3, the setting switches 20, 2 arranged on the internal board 24 through the opening 26 of the case 25.
1, the connectors 34 to 38 for sensor connection, the terminal block 39, and the like are exposed to enable operation and wiring. This lid 27
With the substrate removed, the time setting switch 20 for controlling the cooling fan and the test switch 2 are provided on the board 24.
1, a temperature sensor connecting connector 34, four vibration sensor connecting connectors 35 to 38, and two rows of terminal blocks 39.
And are arranged.

The time setting of the cooling fan 10 is not the fan control for 24 hours, but when the fan 10 is to be controlled within a specified time range, for example, from 9:00 to 20:00, the start time and the end time of the cooling fan 10 are set. It is for setting. The time setting switch 20 is composed of a mode switch 20a for setting the time control setting mode, an up switch 20b for adjusting the time, and a set switch 20c for fixing the corrected time. They are arranged side by side along the left-right direction.

The test switch 21 is a switch for executing / releasing the test mode. In this test mode, the vibration sensor 2 and the crime prevention control device 1 are correctly connected and operate normally without outputting an alarm output. This is a mode for confirming whether or not to do.

This test switch 21 is different from the time setting switch 20 in order not to be operated carelessly.
It is arranged at a position shifted downward and between the temperature sensor connecting connector 34 and the terminal block 39 which is higher than the test switch 21.

The temperature sensor 4 is connected to the temperature sensor connecting connector 34, and the vibration sensor connecting connectors 35 to 35 are connected.
The vibration sensor 2 using, for example, a piezoelectric element is connected to 38. In this embodiment, a maximum of four vibration sensors 2 can be connected. Further, in order to prevent miswiring of the sensors 2 and 4, four vibration sensor connection connectors 35 to 3 are provided.
8 are arranged in parallel below the temperature sensor connection connector 34, and the temperature sensor connection connector 34
And the vibration sensor connecting connectors 35 to 38 are clearly distinguished.

As shown in FIG. 7, 14 connection terminals 39 _{1 to} 39 ₁₄ are arranged in rows on the upper and lower terminal blocks 39, and the first and second terminals 39 in the upper row are arranged. _1, 39 _2, an input terminal of a door switch 11 for detecting the opening and closing of the door of the protective chest the security control device 1 is mounted, the third to
Fifth terminal 39 _{3-39 5,} the fan control output terminal of the cooling fan 10, the sixth to eighth terminal 39 _{6-39 8} is a second alarm output terminal at the time of detection of the abnormal vibration or abnormal temperature The 9th and 10th terminals 39 ₉ and 39 ₁₀ in the lower row are the input terminals of the temperature switch 3 for detecting an abnormal temperature when burnout destruction work is performed by a burner or the like, the 11th and 12th terminals 39. ₁₁ and 39 ₁₂ are the first when detecting abnormal vibration or abnormal temperature.
The alarm output terminals, the 13th and 14th terminals 39 ₁₃ , 39 ₁₄ are
It is a power supply terminal of DC12V.

On the surface of the lid 27 that covers the opening 26 of the case 25, as shown in FIG. 2, the functions of the setting switches 20 and 21, the sensor connection connectors 34 to 38, and the terminal block 39 described above. A seal 40 indicating wiring and wiring is attached at a corresponding position so that it can be easily referred to when necessary.

Further, as shown in FIG. 5, three cutout holes 41 are formed on the bottom surface of the case 25 for drawing out the sensor cables and the like wired to the above-mentioned connectors 34 to 38 for connection. Has been done.

According to the configuration of this embodiment, when the detachable lid 27 is removed from the case 25, the setting switches 20, 21, the sensor connection connectors 34 to 38 and the terminal block 39 are opened through the opening 26 of the case 25. Since the wiring work can be performed easily and the liquid crystal display unit 19 for displaying the operating state, alarm output and the like is arranged on the same surface of the case 25 having the opening 26 formed, visibility is improved. It is possible to improve the operability, and it is possible to operate while watching the display content of the liquid crystal display unit 19, which improves the operability.

When the power is turned on, the crime prevention control apparatus 1 automatically enters a warning mode of fan control for 24 hours in about 3 seconds. In this warning mode, as described above, the vibration sensor 2 or the temperature switch is activated. The abnormal vibration or abnormal temperature from 3 is detected and the output is given to the first and second alarm output relays 5 and 6, and the temperature by the temperature sensor 4 is compared with the set temperature to output to the fan control relay 7. give.

When it is desired to control the cooling fan 10 by designating a time, the time setting switch 20 may be operated to set the time setting mode, and the start time and end time of the fan control may be set.

In this embodiment, after the security control device 1 is attached and wired, the above-described test mode can be set so that it can be confirmed whether or not it is correctly wired and operates normally without issuing an alarm output. In this test mode, when vibration or shock is applied, the fact that it is detected is displayed on the liquid crystal display unit 19.

FIG. 8 is a flow chart showing the operating procedure in this test mode.

First, when the test switch is pressed once (step n1), the liquid crystal display section 19 displays the first display indicating that the test mode is set, and it is determined whether or not the test mode is to be ended (step n1). n2), when finished,
When the test switch 21 is pressed once (step n3), the test mode is ended and the alarm mode is restored (step n4).

In step n2, when the confirmation work is continued without ending the test mode, appropriate vibration is applied to the vibration sensor 2 (step n5), and it is determined whether or not the vibration is correctly input (step n6). ), When the input is correct, confirm that the display on the liquid crystal display unit 19 is the second display different from the first display, and press the test switch 21 once (step n7) to display the liquid crystal display. Part 1
The display of 9 becomes the first display and the process returns to step n1.

As described above, when the vibration is applied to the vibration sensor in the test mode, the display of the liquid crystal display section 19 is changed from the first display to the second display.
It is possible to confirm that the vibration is correctly detected without issuing an alarm output.

The vibration sensor 2 in the test mode
The sensitivity of is automatically set so that it can be confirmed by applying a small vibration.

Further, in the test mode, since the alarm output is not made as described above, for example, in the state where the test mode is set, the operator interrupts the operation and leaves it, and then,
The test mode is configured to automatically return to the alert mode after a certain period of time so that the test mode can be dealt with even if the user forgets to cancel the operation. Further, in order to inform the operator of the remaining time in the test mode, the remaining time is displayed in minutes before the elapse of the predetermined time.

Further, in this embodiment, as described above,
The output of the door switch 11 that opens and closes the door of the protection chest is given, and in order to prevent the alarm output from being output due to vibration when opening and closing the door of the protection chest during maintenance, Closed (door open)
In addition, when the input terminals are closed to open (the door is opened to closed) and a predetermined time has elapsed, no alarm is output due to vibration, and the corresponding blinking display is displayed on the liquid crystal display unit 19. ing.

In this embodiment, the first and second alarm output relays 5 and 6 are constituted by latching relays. However, when a large vibration or shock is applied, their contacts are left in the reversed state. In order to prevent the malfunction of being held, it is configured as follows.

FIG. 9 is a circuit diagram showing the configuration of the first and second alarm output relays 5 and 6 of this embodiment.

The first alarm output relay 5 is composed of a two-pole latching relay, and one pole 5 _O is provided with fixed contacts 5 _O1 and 5 _O2 and a movable contact 5 _O3, and is connected from the MPU 16 to a driver circuit. An input signal for setting or resetting is given to the set coil 5 _S or the reset coil 5 _R via 50, and this serves as an output pole for opening and closing the contacts and giving an output.

The other pole 5 _M is mechanically interlocked with the fixed contact 5 _M1 grounded, the fixed contact 5 _M2 connected to the monitor terminal of the MPU 16, and the movable contact 5 _O3 of the output pole 5 _O. And a movable contact 5 _M3 that operates to provide a monitoring signal to the MPU 16 according to its output state.

On the other hand, the second alarm output relay 6 is also 2
It consists of a pole latching relay, one pole 6 _O
Is a COM contact 6 _O2 connected to the movable contact 6 _O1 ,
It is equipped with NO contact 6 _O3 and NC contact 6 _O4.
An input signal for setting or resetting is applied to the set coil 6 _S or the reset coil 6 _R from 16 via the driver circuit 51, thereby forming an output pole for opening and closing the contact.

The other pole 6 _M is connected to the movable contact 6 _M1 mechanically interlocked with the movable contact 6 _O1 of the output pole 6 _O , and is also grounded to the COM contact 6 _M2 and the monitor of the MPU 16. NO contact 6 _M3 and NC contact 6 _M4 connected to the terminal
And a monitor signal corresponding to the output state of the MPU
It is a monitor pole to be given to 16.

In this embodiment, when the contacts 5 _O3 and 6 _{O1 of} the first and second alarm output relays 5 and 6 are reversed due to a large vibration or shock, the MPU 16 immediately detects it and returns to a normal state. It has a function as a monitoring means for returning to.

That is, the MPU 16 fetches the output states of the monitoring poles 5 _M and 6 _M from the monitor terminal,
The output state of which of the set and reset input signals is output to the second alarm output relays 5 and 6 is compared. When the two output states do not correspond to each other, the set or reset input signal is This is output to the second alarm output relays 5 and 6.

The monitoring operation of the second alarm output relay 6 will be described in more detail.

First, the MPU 16 outputs a high-level set signal from the set terminal to the set coil 6 _S when an abnormality is detected when vibration or temperature is detected.
When releasing the alarm, a reset signal is output from the reset terminal to the reset coil 6 _R.

The output state of the output pole 6 _O of the second alarm output relay 6 is such that when there is an alarm output, the COM contact 6 _O2
-NO contact 6 When _O3 is closed and there is no alarm output, C
The OM contact 6 _{O2 and} NO contact 6 _O3 are opened.

Monitor pole 6 _M linked to this output pole 6 _O
The monitor signal indicating the output state of is at low level when there is an alarm output, and when there is no alarm output,
High level.

Therefore, the MPU 16 as the monitoring means
Output by comparing the output state of the set alarm or the reset input signal to the second alarm output relay 6 with the output state of the monitor pole 6 _M based on the monitor signal. It is possible to determine whether or not the pole 6 _O is operating normally, and when the MPU 16 is not operating normally based on this determination result, the MPU 16 sends a set or reset input signal to the second alarm output relay 6. It outputs and returns to a normal state.

FIG. 10 is a flow chart showing the above monitoring operation.

First, it is judged whether or not the monitor signal from the monitor pole 6 _M is at a high level, that is, whether or not an alarm output is issued from the output pole 6 _O (step n).
1) When the alarm output is not output, it is determined whether or not the instruction is outputting the alarm (step n2). When the instruction is not outputting the alarm, the second alarm output relay 6 is operating normally. Then, the process returns to step n1.

In step n2, when the instruction for outputting the alarm is issued, it is determined that the alarm is not output from the output electrode 6 _O even though the alarm is being output.
U16 outputs a high level set signal from the set terminal to restore the normal state and returns to step n1 (step n3).

Further, when the monitor signal is not at the high level in step n1, that is, when the alarm output is issued from the output electrode 6 _O, it is judged whether or not the instruction is an alarm output (step n4). If the instruction is outputting an alarm, the process is returned to step n1 because it is operating normally.

If it is determined in step n4 that the alarm output is not instructed, the MPU 16 determines that the alarm is being output from the output electrode 6 _O even though the alarm is not output.
A high-level reset signal is output from the reset terminal to restore the normal state, and the process returns to step n1 (step n5).

The above is the monitoring operation for the second alarm output relay 6, but the same operation is performed for the first alarm output relay 5.

In the case of the first alarm output relay 5,
When there is an alarm output, the contacts 5 _O1 , 5 _O2 of the output pole 5 _O
Open, and when there is no alarm output, the contacts 5 _O1 and 5 _O2 of the output pole 5 _O are closed. Further, the monitor signal of the monitor pole 5 _M becomes high level when there is an alarm output, and becomes low level when there is no alarm output.

As described above, the first and second alarm output relays 5 and 6 are provided with the monitor poles 5 _M and 6 _M interlocking with the output poles 5 _O and 6 _O. The output state based on the monitoring signals from the work poles 5 _M and 6 _M and the output state of the set or reset input signal to the output poles 5 _O and 6 _O are monitored, and when they do not correspond, that is, vibration When the contact is reversed due to shock or impact, an input signal can be output to immediately restore the normal state.

Also in this embodiment, there is a possibility that the contacts of the first and second alarm output relays 5 and 6 may be reversed due to shock or vibration and the alarm output may be output for a moment. A final alarm output may be output when the alarm output is continuously output from the first and second alarm output relays 5 and 6 for a certain period or longer.

Although this embodiment has been described by applying it to the crime prevention control device, it goes without saying that the latching relay and its malfunction prevention circuit of the present invention can also be applied to other devices.

[0070]

As described above, according to the latching relay of the present invention, since it is provided with the monitoring pole that mechanically interlocks with the movable contact of the output pole and outputs the monitoring signal according to the output state. The output state of the output pole can be grasped based on the monitor signal of the monitor pole.

According to the malfunction preventing circuit for the latching relay of the present invention, the output state of the monitoring pole of the latching relay and the output state of which of the set signal and the reset input signal is output to the output pole are determined. When the contacts of the latching relay are reversed due to vibration or shock and the two output states do not correspond to each other, an input signal can be output to immediately restore the normal state.

According to the crime prevention control device of the present invention, when an alarm output relay that outputs an alarm output when abnormal vibration or abnormal temperature is detected malfunctions, it can be immediately returned to a normal state.

[Brief description of drawings]

FIG. 1 is a block diagram of a crime prevention system using a crime prevention control device according to an embodiment of the present invention.

FIG. 2 is a front view of the crime prevention control device of FIG.

FIG. 3 is a front view in which a part of the crime prevention control device of FIG. 1 is cut away.

FIG. 4 is a side view of the crime prevention control device of FIG. 1.

5 is a bottom view of the security control device of FIG. 1. FIG.

FIG. 6 is a vertical sectional side view of the crime prevention control device of FIG. 1.

FIG. 7 is a diagram showing a connection arrangement of terminals.

FIG. 8 is a flowchart showing an operation procedure in a test mode.

FIG. 9 is a circuit diagram of a main part of the crime prevention control device of FIG.

FIG. 10 is a flowchart for explaining the operation.

[Explanation of symbols]

1 Crime prevention control device 2 Vibration sensor 3 Temperature switch 5,6 1st and 2nd alarm output relay 7 Fan control relay 16 MPU 5 _O , 6 _O Output pole 5 _M , 6 _M Monitor pole

Claims (5)

[Claims] 1. A movable contact comprises at least two poles mechanically interlocking with each other, one pole being an output pole activated by a set or reset input signal, and the other pole depending on its output state. A latching relay that has a monitoring pole that outputs a monitoring signal. 2. The movable contact comprises at least two poles mechanically interlocking with each other, one pole being an output pole activated by a set or reset input signal, and the other pole being in its output state. A latching relay that is a monitoring pole that outputs a corresponding monitoring signal, an output state of the monitoring pole, and an output state that indicates whether the set or reset input signal is output to the output pole. And a monitoring unit that outputs the input signal to the latching relay and makes the both output states correspond to each other when the two output states do not correspond to each other, and a malfunction preventing circuit for the latching relay. 3. The monitoring means determines the output state of the monitor pole, and determines the output state of which input signal is output to the output pole according to the determination result. 3. The malfunction preventing circuit for a latching relay according to claim 2, which outputs a set or reset input signal when the two output states do not correspond to each other. 4. The malfunction preventing circuit for a latching relay according to claim 2, wherein the monitoring means is composed of a microcomputer. 5. A crime prevention control device for driving an alarm output relay to issue an alarm when abnormal vibration or abnormal temperature is detected based on the output of at least one of a vibration sensor and a temperature switch, wherein the alarm output relay Has at least two poles whose movable contacts mechanically interlock with each other, one pole being an output pole activated by a set or reset input signal, and the other pole being in its output state. Comprised of a latching relay that is a monitoring pole that outputs a corresponding monitoring signal, and an output state of the monitoring pole of the latching relay,
The output state of which of the set and reset input signals is output to the output pole is monitored, and when both output states do not correspond to each other, the input signal is output to a latching relay to output the both output states. A crime prevention control device, comprising: a monitoring unit that corresponds to the above.