JPS5991378A - Detection circuit for running-down and removal of battery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery dead/removal detection circuit suitable for use in a power supply circuit, etc. that supplies power obtained from a battery such as a primary battery or a secondary battery to each part of the circuit to drive the same. .

Among conventional security anomaly detectors, radiant energy detection devices installed on the walls and ceilings of rooms and hallways use light condensing plates with multiple primary axes to detect radiant energy from multiple directions (e.g. heat rays). ) By focusing the light on the total radiant energy detection sensor, and filtering the output of this special radiant energy detection sensor using a filter circuit, it is possible to determine whether there is a heating element (
When someone (for example, a person) intrudes, it is detected and notified.

By the way, this type of radiant energy detection device stops the detection function as described above if the electric wire supplying power to the device is cut off for some reason. ? It is considered desirable to supply power to the circuit using a battery when it is desired to maintain the power at all times. However, in this case, if this battery runs out or is removed, not only will the circuit not function properly, but if you are not aware of this, the output of this radiant energy detection device will be monitored. On the monitor side, there is a possibility that it may be assumed that no intrusion of the heating element has occurred.

In view of the above points, the present invention provides a first aspect of the invention that prevents batteries from running out! This system provides a complete battery dead/removal detection circuit that can detect when the battery is removed or removed, and output the detection result.The power supply voltage detection circuit detects the power supply voltage supplied from the battery. When the power supply voltage is lower than a predetermined set voltage, the battery abnormality detection circuit is fully activated and the battery abnormality detection circuit outputs the battery abnormality signal in its entirety. The second invention provides a battery dead/removal detection circuit that can achieve power saving in the circuit by using a latch type relay or the like, and the power supply voltage detection circuit detects the power supplied from the battery. When the voltage is detected and the power supply voltage is lower than a predetermined set voltage, the battery abnormality detection circuit is fully activated and a battery abnormality signal is output from the battery abnormality detection circuit, and then when the battery is replaced. Alternatively, the battery abnormality detection circuit is reset by a normality recovery circuit when a recovery switch is operated.

Hereinafter, one embodiment of the present invention will be explained based on its causes.

First, before explaining the dead battery/removal detection circuit according to the present invention, a radiant energy detection device to which the present invention is applied will be briefly explained.

FIG. 1 is a perspective view showing an example of a condensing plate of a general radiant energy detection device. In this figure, l denotes a concave body constituting the base of the condenser plate 2, and a plurality of concave reflecting mirrors 3a to 3n are provided on the inner surface of the concave body 1, respectively.

The concave reflector 3a has a concave radius that is twice that of the concave body 1, and a radiant energy detection sensor 4 is provided on the reflection axis of the concave reflector i3a. Further, the concave reflectors 3b to 3n are configured similarly to the above-mentioned concave reflector 3a, and the reflection axes of these concave reflectors 3b to 31 are connected to the concave reflector 3a on the radiant energy detection sensor 4.
It intersects with the reflection axis of In this way, in this condensing plate 2, the concave radius of the concave reflectors 3a to 3n is twice that of the total concave body 1, and the concave radius of each of these concave reflectors 3a to 3n is
3n each has an independent warning area (light collection area), so if the radiation energy from the moving heating element is collected by the light collecting plate 2, this heating element will be able to The amount of heat rays collected on the radiant energy detection sensor 4 changes each time the user enters or exits the area. Therefore, by detecting the output change of the radiant energy detection sensor 4 and using a filter to discriminate the frequency, it is possible to distinguish between a stationary heating element (for example, a lamp, a heater, etc.) and a moving heating element. can.

Next, a description will be given of the main circuit of the radiant energy detection device based on the above-mentioned principle of detection of the yielding heating element, and the battery dead/removal detection circuit of the present invention for detecting a power supply abnormality of the main circuit.

FIG. 2 is a diagram showing an example of the main circuit of the radiant energy detection device and an example of the battery drain/removal detection circuit according to the present invention. The main circuit and battery dead/removal detection circuit will be explained in sequence below with reference to this figure.

First, the main circuit 5 is used for detecting heat rays collected by the light collecting plate 2 (see FIG. 1). It consists of a processing circuit 6 that processes the output of the electric detector 4, and a processing circuit 6 that processes the output of the electric detector 4. is processed by the processing circuit 6, and when the polarity is reversed when the signal obtained is higher or lower than a predetermined reference voltage J, an alarm signal is sent to the monitor circuit side indicating that a moving heating element has been detected. Send.

Next, the battery dead/removal detection circuit 7 according to the present invention will be explained. In this battery dead/removal detection circuit 7, reference numeral 8 is a power line for supplying voltage obtained by the batteries 9a and 9b to various parts of the circuit, and one end of a capacitor 10 is connected to this power line/8. capacitor 10
is for dropping noise on the power supply line 8 to the ground line 11, the other end of this capacitor 10 is connected to the ground line 11 (grounded), and the one end of this capacitor 10 is connected to the resistor 12. connected to one end.

The other end of the resistor 12 is the variable resistor 13, and the resistor 14.15
The connection point between this resistor 12 and the variable resistor 13 is connected to the sliding terminal of the variable resistor 13, and the voltage detection circuit 16 (power supply voltage detection circuit) is connected to the sliding terminal of the variable resistor 13. is connected to the terminal 16a of the resistor 14 and the resistor 1.
5 is grounded via a capacitor 17, and is also connected to a terminal 16b of the voltage detection circuit 16. The voltage detection circuit 16 compares the reference voltage Vf provided in the circular part with the voltage VI applied to the terminal 16b, and depending on the comparison result, sets the terminal 16'c't to the flow state or to the ground state. The terminal 16d of this voltage detection circuit 16 is connected to the power supply line 8, the terminal 16e is grounded, and the terminal 16C is connected to the connection point between the resistor 18 and the capacitor 19. .

One end of the resistor 18 (the terminal not connected to the capacitor 19) is connected to the power supply line 8, and one end of the capacitor 19 (the terminal not connected to the resistor 18) is grounded. , the connection point of these resistor 18 and capacitor 19 is connected to the base of a transistor 21 via a resistor 20. The transistor 21 is turned on when the terminal 16c of the voltage detection circuit 16 is in a flow state.
The collector of is connected to the collector of transistor 22,
And the emitter of the transistor 21 is the transistor 22
connected to the base of. This transistor 22 amplifies the entire output of the transistor 21, and the collector of the transistor 22 is connected to the power supply line 8.
Moreover, the emitter is grounded via a resistor 23 and connected to the base of a transistor 24. The transistor 24 drives a latch type relay circuit 25 based on the output of the transistor 22, and the emitter of the transistor 24 is grounded, and the collector is connected to the winding 2.
It is connected to a power supply line 8 via 6. Here, the winding 26 is used to switch the switches 27 and 28' in the relay circuit 25, and the common terminal Z7a of the switch 27 is grounded, and the terminal 27b of the switch 27 is connected to the capacitor 30 via the coil 29. The terminal 27C of the switch 27 is connected to the base of the transistor 21.

Further, the junction between the resistor 18 and the capacitor 19 is also connected to the base of the transistor 32 via a resistor 31't-. The transistor 32 is turned off when the terminal 16c of the voltage detection circuit 16 is grounded and when the power supply voltage is not supplied to the power supply line 8 (when the batteries 9a and 9b are removed). The emitter of the transistor 32 is grounded, and the collector is connected to the resistor 3.
3. Connected to the power supply line 8 via the cathode of the diode 34 and the anode of the diode 34 in sequence,
The connection point between these resistors 33 and the diode 34 is the resistor 3
5. It is grounded through a capacitor 36 in sequence. In this case, the capacitor 36 supplies power to the transistor 32 for a predetermined period when power supply voltage is no longer supplied to the power supply line. Further, the transistor 3
The collector of 2 is also connected to the pace of transistor 37. A transistor 37 amplifies the output of the transistor 32, and has an emitter grounded and a collector connected to the base of the transistor 38. The transistor 38 drives the relay circuit 25 based on the output of the transistor 37, and the emitter of the transistor 38 is grounded via a capacitor 39, and the emitter of the transistor 38 is grounded via a capacitor 39.
The cathode of the diode 4o and the anode of the diode 4o are sequentially connected to the power supply line 8, and the collector is grounded through the entire winding 41. Is the winding 41 the 27% switch in the relay circuit 25? 8 (z It is a device that switches in the opposite direction to the winding 26, and when a drive current flows through this winding! 41,
The common terminal 28a and the terminal 28b of the switch 28 are connected, and the common terminal 27a of the switch 27 and the terminal 27
b is connected.

Here, the common terminal 28a of this switch 28 is grounded, and the terminal 28b is connected to the transistor 37.
The pin terminal 28c is connected to the other end of the capacitor 3o via the coil 42. The connection point between the capacitor 3o and the coil 29 is connected to the battery abnormality signal input terminal (the path shown) on the monitor circuit side, and the connection point between the capacitor 30 and the coil 42 in parentheses is connected to the battery abnormality signal input terminal on the monitor circuit side. Connected to the input terminal (path shown).

Thus, in this embodiment, the transistors 32,
37j38 and switch 27, J: battery 9a
, 9b is constructed, and the transistors 21, 22゜24, switch 28, etc. are used to replace the stain ponds 9a, 9b so that the voltage from these batteries 9a, 9bK becomes normal. A normality recovery circuit 44 is configured to automatically reset the battery abnormality detection circuit 43 when the abnormality occurs.

Next, the operation of this embodiment having the above structure will be explained with reference to the waveform diagram shown in FIG.

First, when the batteries 9a and 9b are removed,
The voltage of the power supply line 8 is zero as shown in FIG. 3(a). When the batteries 9a and 9b'i are set at time io, the voltage of the power supply line 8 rises to +Vm, and the power supply voltage is supplied to the terminal 16d of the voltage detection circuit 16 via this power supply line 8, and this voltage detection circuit The reference voltage generating circuit in 16 becomes operational. In this case, since the voltage Vl (see FIG. 3 (b)) applied to the reference voltage VfJ:j2 terminal 16b outputted by the reference voltage generation circuit is higher, the voltage detection circuit 16 puts the terminal 16ci into the flow state. (See Figure 3 (c)). Also, at this time to,
As the voltage of the power supply line 8 rises, charging of the capacitor 36.39 is started, and power is supplied to the transistor 32.38, but in this case, the common terminal 28a and the terminal 28b of the switch 28 are Since these transistors 32, 38 and 37 are connected to each other, these transistors 32, 38 and 37 maintain an off state.

Further, in parallel with the above-described operation, power is also supplied to transistors 21, 22, and 24 at time 1o. Note that at this time, the capacitor 19 is not yet sufficiently charged and the voltage at the connection point between the capacitor 19 and the resistor 18 (see FIG. 3) is almost zero, so these transistors 21°22.24 is in the off state.

Next, a period To (this period To is a very short period) has passed from time to to time 11, and when the voltage at the connection point between the capacitor 19 and the resistor 18 rises sufficiently, the Darlington-connected transistor 21 .22 turns on, turning on the transistor 24 as shown in FIG.
The common terminal 27a and the terminal 27c are connected, and the ground voltage is supplied to the base of the transistor 21, and these transistors 21, 22 and 24 are turned off, and
The common terminal 28a and the terminal 28c of the switch 28 are connected, and the ground voltage (battery normal signal) shown in FIG. 3(G) is supplied to the battery normal signal input terminal on the monitor side. In this case, since the base current is already flowing through the transistor 32, even if the base of the transistor 37 is no longer grounded by the switch 28, the transistors 37 and 38 remain in the off state as shown in FIG. 3 (1). maintain. Therefore, after a sufficient period of time has elapsed since the batteries 9a and 9b were set (for example, at time 12), the transistors 21, 22, 24, 37, and 38 are turned off, and only the transistor 32 is turned off (as shown in FIG. 3). As shown in ), it is in the on state.

Next, in such a state, for example, at time t3, the battery 9
If any one of a and 9b is removed, the transistor 32
becomes off state, capacitor 36 → resistor 35 → resistor 3
3→Base of transistor 37→Emitter of transistor 37→Grounding point, current flows, and the transistor 37 turns on, and this transistor 37
Then the transistor 38 is turned on. As a result, a drive current flows through the winding 41 through the path of capacitor 39 → transistor 38 → winding 41 → ground point, energizes this winding 41, and connects common terminal 28a and terminal 28b of switch 28. When the transistors 37 and 38 are turned off, the pass terminal 27a and the terminal 27b of the switch 27 are connected, and the ground voltage (battery abnormal signal) shown in FIG. is supplied.

Note that at this time, the transistors 21.22.2
4 maintains the off state as before time t3.

Next, at time t4, when the batteries 9a and 9b are set again, the switches 27 and 28 are switched at the point in time (time ts) when a small amount of time has elapsed from this time t4 in the same manner as the operation at time 1o described above. The common terminal 27a and the terminal 27c of the switch 28 are connected, and the common terminal 28a and the terminal 28c of the switch 28 are connected, and a battery normal signal is supplied to the monitor circuit side. Next, in this state, as time passes, the voltages of the batteries 9a and 9b decrease, and at time t6, when the voltage 1 applied to the terminal 16b becomes lower than the reference voltage Vf, the voltage detection circuit 16 detects the voltage at the terminal 16c'. ! The transistors 32 are all turned off by being grounded. As a result, the transistor 3 is connected to the positive electrode terminal of the battery 9a → the power supply line 8 → the diode 34 → the resistor 33 → the base of the transistor 37 → the emitter of the transistor 37 → the ground point (ground line 11).
A base current flows through transistor 7, turning on transistor 37, and at the same time, transistor 37 supplies base current to transistor 38. As a result, the winding 41
The switches 27 and 28 are switched and a battery abnormality signal is supplied to the monitor circuit.

In this way, in this battery dead/removal detection circuit,
The voltage detection circuit 16 detects the voltages of the batteries 9a and 9b, and when these battery voltages are below a predetermined value (the predetermined value is a value determined by the reference voltage Vf and the voltage division ratio of the resistors 12 to 15), the transistor 37 is activated. , 381 - switch 27.28 in the latch type relay circuit 25 when turned on
If the battery voltage drops, you can know this voltage drop and also switch the battery 9.
a.

Since the capacitors 36 and 39 supply power to the transistors 37 and 38 when the battery 9b is removed, this can be detected even if these batteries are removed. Further, in this case, the transistors 37 and 38 are normally connected.

21, 22, 24t- is turned off, and only the transistor 32 for detecting a voltage drop is turned on, so power consumption during normal operation can be kept low.

Furthermore, in the above-described embodiment, the reference voltage Vf and the voltage v1. l! : It is assumed that the output of the terminal 16c of the voltage detection circuit 16 changes by making all comparisons, but in reality the voltage v2 applied to the terminal 16a changes.
By comparing the voltage V+ with the reference voltage f, a hysteresis characteristic is imparted to the operation of the voltage detection circuit 16.

Furthermore, the same effect as in the above-described embodiment can be obtained by using a one-shot multivibrator in place of the transistors 21, 22 and 32 shown in FIG. In this case, at least one of these multivibrators used as a substitute for the transistor 32 is equipped with a bank-up power supply (for example, a charged Of course, it also has a capacitor).

Furthermore, in the embodiment described above, the battery abnormality detection circuit 43 is reset using the normality recovery circuit 44. For example, the battery normality recovery circuit is constituted by a non-lock switch, and this non-lock switch is manually operated. In particular, a current may be applied to the c9 winding 26 to return the battery abnormality detection circuit 43 to the normal state.

As explained above, the battery dead/removal detection circuit according to the first aspect of the present invention detects the entire power supply voltage supplied from the battery, and if this power supply voltage is lower than a predetermined set voltage, the power supply a power supply voltage detection circuit that outputs a voltage down signal indicating that the voltage is abnormal; and a battery abnormality signal that indicates that the battery is dead or removed based on the voltage down signal from the power supply voltage detection circuit. Since it is equipped with a battery abnormality detection circuit that outputs all output, it is possible to detect when the battery is dead or removed, and the detection result can be output. Accidental noise caused by battery removal can be prevented.

Further, the battery dead/removal detection circuit according to the second invention is as follows:
A power supply voltage detection circuit that detects a power supply voltage and outputs a voltage down signal indicating that the power supply voltage is abnormal when the power supply voltage is lower than a predetermined set voltage, and this power supply voltage detection circuit. a battery abnormality detection circuit that outputs a battery abnormality signal indicating that the battery has run out or has been removed based on the voltage down signal from the battery; and a normal battery abnormality detection circuit that returns the battery abnormality detection circuit to its initial state. Since a return circuit is provided, even if a latch type relay is provided at the output stage of the battery abnormality detection circuit, this relay can be returned to the normal state when the battery becomes normal. In this case, once this relay is energized, it can be kept in this state mechanically (7) and the transistors can be turned on only when switching this relay (1) and turned off during normal operation, which allows the circuit It is possible to reduce power consumption.

In this case, even if a multivibrator is used in place of the transistor, the same effect can be obtained by turning off the multivibrator normally and turning it on only when switching the relay. be able to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a condensing plate of a radiant energy detection device to which the dead battery/removal detection circuit according to the present invention is applied, and FIG. 2 shows the main circuit of this radiant energy detection device and its main circuit. A diagram showing an embodiment of the dead battery/removal detection circuit according to the invention, FIG. 3 is the same embodiment? FIG. 3 is a waveform diagram for explanation. 9a, 9b...Battery, 16...Voltage detection circuit (power supply voltage detection circuit), 21, 22.24...Transistor (normality recovery circuit), 26...Winding (normality recovery circuit). 27...Switch (battery abnormality detection circuit), 28...
Switch (normality recovery circuit), 32, 37.38... Transistor (battery abnormality detection circuit), 36.39... Capacitor, 41... Makikatsu (battery abnormality detection circuit). Patent applicant: Chino Seisakusho Co., Ltd. Japan Security Insurance Co., Ltd.

Claims (1)

[Claims] ■ A power supply circuit provided in a power supply circuit that supplies power obtained by a battery to each part of the circuit to drive each part of the circuit, and which determines whether the power supply voltage from the battery input to the power supply circuit is normal. In the battery dead/removal detection circuit that detects whether
A power supply voltage detection circuit that detects the entire power supply voltage and outputs a full voltage down signal indicating that the power supply voltage is abnormal when the power supply voltage is lower than a predetermined set voltage J, and this power supply voltage detection circuit. and a battery abnormality detection circuit that outputs a full battery abnormality signal indicating that the battery has run out or has been removed based on the voltage down signal from the battery. circuit. 2. A dead battery is installed in a power supply circuit that drives each part of the circuit by supplying power obtained from the battery to each part of the circuit, and detects whether the power supply voltage from the battery input to this power supply circuit is normal.・In the removal detection circuit,
a power supply voltage detection circuit that detects the power supply voltage and outputs a voltage down signal indicating that the power supply voltage is abnormal if the power supply voltage is lower than a predetermined set voltage; a battery abnormality detection circuit that outputs a battery abnormality signal indicating that the battery has run out or has been removed based on the voltage down signal from the circuit; and a battery abnormality detection circuit that returns the battery abnormality detection circuit to an initial state. Completely equipped with a normal recovery circuit and battery dead/removal detection circuit. 3. The dead battery/removal detection circuit according to claim 2, wherein the normality recovery circuit returns the battery abnormality detection circuit to its initial state when a manual reset switch is operated. 4. Claim 2, wherein the normality recovery circuit detects when the - power supply voltage detection circuit is not outputting a voltage down signal and returns the battery abnormality detection circuit to its initial state. Described battery dead/removal detection circuit.