CN220823332U - Signal processing circuit and emergency lighting equipment thereof - Google Patents

Abstract

The utility model relates to the field of emergency lighting equipment, and provides a signal processing circuit which comprises an optical coupler isolator; a bridge rectifier unit; and the signal input port is connected to the input end of the optical coupler isolator through the bridge rectifying unit. The two connecting terminals of the signal input port can perform normal signal detection no matter which of the two connecting terminals is connected with positive polarity signals or passive signals, so that no matter whether the two connecting terminals of the signal input port are sensitive to the positive polarity and the negative polarity of the connected signals, the compatibility of the signal processing circuit to the positive polarity and the negative polarity is improved.

Description

Signal processing circuit and emergency lighting equipment thereof

Technical Field

The utility model relates to the field of circuits, in particular to the field of emergency equipment illumination.

Background

Fig. 1 shows a passive signal processing circuit of the prior art. When the signal input port P1 is not connected with a passive signal (for example, a relay off signal), the input end of the opto-isolator is not conducted, the output is disconnected, and the QQ23 pin outputs a high level due to the existence of the first resistor R1 for pull-up.

When the signal input port P1 is connected to a passive signal (for example, a closing signal of a relay), VCC current passes through the input end of the optocoupler isolator (R2 acts to prevent the optocoupler isolator from being turned on by mistake), and the resistor R3 signal input port P1 is turned on to form a loop. The output end of the optical coupler receives the effective signal of the input end of the optical coupler and is conducted. The QQ23 pin is pulled low to output a low level.

Fig. 2 shows an active signal processing circuit of the prior art, whose input short even inputs need to be distinguished between positive and negative. As shown in fig. 2, when no signal is input to the signal input port P1, the QQ23 pin outputs a high level due to the resistor R1. When the signal input port P1 inputs an active signal (like a 12v 24v dc signal), the current input D1 optocoupler isolator input, resistor R3 returns to ground. The optocoupler is turned on, and the QQ23 pin is pulled low to output a low level.

Therefore, in the prior art, two different signals, namely an active signal and a passive signal, need to be processed by adopting different signal detection circuits, and the signal detection circuits are also differentiated and sensitive to the positive polarity and the negative polarity of the active signal, so that the signal detection circuits are faulty due to the fact that the positive polarity and the negative polarity are connected by mistake.

Disclosure of utility model

Based on the above-mentioned drawbacks, one of the objects of the present utility model is to improve the compatibility of the signal processing circuit with respect to positive and negative polarities.

The second object of the present utility model is to prevent misconnection of positive and negative polarities of an input port of a signal processing circuit.

The third object of the present utility model is to improve the compatibility of the signal processing circuit with the active signal and the passive signal.

A fourth object of the present utility model is to improve the assemblability between a signal processing circuit and a signal input circuit in an emergency lighting device.

To solve at least one of the above problems, in one embodiment of the present application, a signal processing circuit is provided, including:

An optocoupler isolator;

A rectifier bridge;

And the signal input port is connected to the input end of the optical coupler isolator through the rectifier bridge.

Optionally, in some embodiments, the signal input port includes two inputs respectively connected to the first input and the second input of the rectifier bridge;

and the output end of the rectifier bridge is connected to the input end of the optical coupler isolator.

Optionally, in some embodiments, two opposite bridge arms of the rectifier bridge are diodes with the same conduction direction respectively;

two adjacent bridge arms of the rectifier bridge are diodes with opposite conducting directions respectively.

Optionally, in some embodiments, the rectifier bridge first diode, second diode, third diode, fourth diode;

the anode of the first diode is connected with the anode of the second diode, and the connection point of the anode of the first diode is used as a first output end of the rectifier bridge;

the cathode of the third diode is connected with the cathode of the fourth diode, and the connection point of the cathode of the third diode is used as a second output end of the rectifier bridge;

The cathode of the first diode is connected with the anode of the fourth diode, and the connection point of the cathode of the first diode is used as the first input end of the rectifier bridge;

The cathode of the second diode is connected with the anode of the third diode, and the connection point of the second diode is used as the second input end of the rectifier bridge; and

The first output end is connected to the cathode of the phototransistor in the opto-isolator;

the second output terminal is connected to the anode of the phototransistor in the optocoupler isolator.

Optionally, in some embodiments, the first input is connected to analog ground through a plurality of resistors in series, a first connection point between the plurality of resistors being connected to a first terminal in the signal input port; the second input terminal is connected to a second terminal in the signal input port.

Optionally, the signal processing circuit of some embodiments further includes a digital power supply, a digital ground, an analog power supply, an analog ground, and a fourth resistor;

The output end of the optical coupler isolator is respectively connected with the digital power supply and the digital ground; the phototransistor is a photodiode;

The analog power supply is connected to the input end of the optocoupler isolator or the anode of the photodiode in the optocoupler isolator through the fourth resistor;

The signal processing circuit further comprises a second resistor connected across the anode and the cathode of the photodiode.

Optionally, in the signal processing circuit of some embodiments, the analog power supply is coupled to the digital power supply through the power isolation module;

the first output terminal is connected to the cathode of the photodiode through a third resistor.

Optionally, in the signal processing circuit of some embodiments, the power isolation module is a power isolation transformer;

The collector electrode of the phototriode in the optocoupler isolator is connected with the digital power supply through a first resistor;

An emitter of a phototriode in the optocoupler isolator is connected with the digital ground;

The plurality of resistors includes a fifth resistor and a sixth resistor, the first connection point between the fifth resistor and the sixth resistor being connected to the signal input port or the first terminal therein, or;

The first terminal in the signal input port is connected to the first input terminal through the fifth resistor and to the analog ground through the sixth resistor.

In another embodiment of the present application, there is also provided an emergency lighting device, including: a signal processing circuit as in any of the other embodiments.

Optionally, the emergency lighting device of some embodiments is implemented as one of: an emergency lighting controller, an emergency lighting centralized power supply, an emergency lighting distribution device or an emergency lighting distribution box.

The emergency lamp is used as an important safety facility, and a host connected with the emergency lamp supplies power to the emergency lamp, wherein the host is an emergency lighting controller, an emergency power box or an emergency power box; the change in output power of the host may cause a sudden and sudden effect of the electrical consumer, which may be detrimental to the fire emergency lighting.

To solve this problem, in some embodiments of the present application, the energy storage device is connected as a buffer unit of electric energy inside the host or on the light source board of the fire emergency lighting fixture powered by the host, so that the supply of electric energy to the light source board in the fire emergency lighting fixture can be kept stable during the fluctuation of the power supply provided by the host, and thus the luminous power of the light source board is substantially constant.

It is contemplated that the emergency lighting controller, the emergency lighting centralized power supply, the emergency lighting distribution device or the emergency lighting distribution box in some embodiments of the present application further comprise the energy storage device described above. The emergency power box according to any one of the embodiments of the present application may further include: the power panel and the energy storage device are arranged on the power panel, are electrically connected with the light source panel and are used for externally connecting electric energy from the battery assembly; the energy storage device further includes:

A plurality of power storage components including an anode and a cathode, respectively;

A second power storage component; and

One or more switching units, wherein the one or more switching units comprise at least two or more poles, and wherein:

In a high-level mode of the one or more switching units, the first power storage component and the second power storage component are coupled in series, and

In a low-level mode of the one or more switching units, the first power storage component and the second power storage component are coupled in parallel.

Optionally, in one embodiment of the application:

The one or more switch units comprise a first single pole double throw switch and a second single pole double throw (also known as single pole double throw) switch;

In the high-level mode, both the first single-pole double-throw switch and the second single-pole double-throw switch are in the first switch position, thereby connecting the anode of the first power storage component to the cathode of the second power storage component; and

In the low-level mode:

The first single pole double throw switch is in the second switch position, thereby connecting the cathode of the first electrical storage component to the cathode of the second electrical storage component; and

The second single pole double throw switch is in a second switch position, thereby connecting the anode of the first electrical storage component to the anode of the second electrical storage component.

Optionally, in one embodiment of the application:

The one or more switch units comprise two single pole single throw switches;

in the high-level mode:

a first of the two single pole single throw switches is in an off position, and

A second of the two single pole single throw switches is in an engaged energized position, thereby connecting the anode of the first electrical storage assembly to the cathode of the second electrical storage assembly; and

In the low-level mode:

A first of the two single pole single throw switches is in an engaged energized position, thereby connecting the cathode of the first electrical storage assembly to the cathode of the second electrical storage assembly, and

The second of the two single pole single throw switches is in the off position.

Optionally, in one embodiment of the application, the energy storage device further comprises at least one charging unit switch configured to connect and disconnect the first and second electrical storage components to and from the charging unit.

Optionally, in the power box of one embodiment of the present application, in the high-level mode:

the anode of the light source plate is connected to the anode of the first power storage component; and

The cathode of the light source plate is connected to the cathode of the first power storage component.

Optionally, in one embodiment of the application, the energy storage device further comprises at least one load switch comprising at least two or more poles, wherein in a high level mode:

When the at least one load switch is set to one or more first switch positions:

an anode of the light source board is connected to an anode of the first power storage component, and

The cathode of the light source plate is connected to the cathode of the first power storage component; and when the at least one load switch is set to one or more second switch positions:

An anode of the light source board is connected to an anode of the second power storage component, and

The cathode of the light source plate is connected to the cathode of the first power storage component.

Optionally, in one embodiment of the present application, the control circuit is further configured to set a position of the at least one load switch according to a state parameter of at least one of the first power storage component and the second power storage component when in the high-level mode.

Optionally, in one embodiment of the application:

In a high level mode, the energy storage device is configured to receive a charging voltage of 220 volts or 800 volts above 240 volts.

Optionally, in one embodiment of the application, in the charging configuration, the energy storage device is configured to provide a voltage of 48 volts or more to the fire emergency lighting fixture or the light source panel.

Optionally, the emergency power box according to an embodiment of the present application further comprises an energy storage control unit configured to select between a low level mode and a high level mode.

In corresponding these embodiments, the relationship of the electrical connection between the energy storage device and the external power source is dynamically adjusted in response to changes in the external power supply voltage, and/or the relationship of the electrical connection between the energy storage device and the light source panel is dynamically adjusted in response. Therefore, a stable feed channel is established between an external power source such as a battery and the light source plate through the intermediate energy storage device, so that the light power of the light source plate in the fire emergency lighting lamp is basically constant.

For example, in some embodiments, a) the electrical connection relationship between the energy storage device and the light source board is dynamically switched between series and parallel by the coordinated operation of the switching units, or b) the electrical connection relationship between the entire energy storage device and the external power source is dynamically switched between series and parallel by the coordinated operation of the switching units, which allows the feed channel of the "external power source→the energy storage device" and/or the feed channel of the "energy storage device→the light source board" to be dynamically adapted to the voltage variation of the external power source, so that the electric energy obtained by the light source board of the terminal remains stable.

Optionally, the power box of some embodiments may further include a voltage stabilizing circuit connected to the output end in addition to the current limiting protection circuit, so as to further provide more stable electric energy, such as voltage, to the external lamp.

Accordingly, in some embodiments of the present application, an emergency lighting controller, an emergency lighting centralized power supply, an emergency lighting distribution device, or an emergency lighting distribution box according to one embodiment, there is further provided a voltage stabilizing circuit including:

A linear direct current voltage stabilizing unit, which is arranged to receive an input voltage through an input terminal of a transistor and provide a regulated output voltage at an output terminal of the transistor;

A dc-dc converter configured to output a dc-dc converter voltage that powers a driving circuit of the linear dc voltage stabilizing unit;

A dc-to-dc converter control circuit configured to control the dc-to-dc converter such that the dc-to-dc converter voltage is (i) greater than the input voltage and (ii) no more than a high voltage threshold; and

An under-voltage lockout unit is provided to enable the linear direct current voltage stabilizing unit once the direct current converter voltage is (i) greater than a minimum voltage for operation of the linear direct current voltage stabilizing unit and (ii) greater than the regulated output voltage.

Optionally, the voltage stabilizing circuit is characterized in that the transistor is an N-channel MOSFET controlled by the driving circuit; the linear direct current voltage stabilizing unit is a low dropout voltage regulator.

Optionally, the voltage stabilizing circuit above, wherein:

The minimum voltage corresponds to the potential difference between the gate terminal and the source terminal of the N-channel MOSFET so as to provide non-zero output current for the output terminal of the linear direct current voltage stabilizing unit; and

The high voltage threshold corresponds to a safe operating region of the N-channel MOSFET.

Optionally, in the voltage stabilizing circuit, the dc-dc converter is a symmetrical cross-coupled symmetrical dc-dc converter.

Optionally, the voltage stabilizing circuit described above, wherein the dc-dc converter voltage corresponds to a frequency of a clock signal from the dc-dc converter control circuit.

Optionally, the voltage stabilizing circuit described above, wherein the frequency of the clock signal is controlled by a voltage controlled oscillator driven by a differential amplifying unit of a control circuit of the dc-dc converter; and

The differential amplifying unit is a four-input operational amplifier, and once the voltage of the direct-current/direct-current converter is smaller than the high-voltage threshold value, the output of the four-input operational amplifier is higher than the input voltage by a preset value to change the voltage in a floating mode, wherein the preset value is determined by the working characteristics of the transistor of the linear direct-current voltage stabilizing unit.

In the signal processing circuit according to some embodiments of the present application, the signal input port is connected to the input end of the optocoupler isolator through one rectifier bridge, so that the two connection terminals of the signal input port can establish a signal transmission path no matter which one of the two connection terminals is connected to a positive polarity signal or a passive signal, and normal signal detection is performed, so that no matter whether the two connection terminals of the signal input port are insensitive to the positive polarity and the negative polarity of the connected signal, the compatibility of the signal processing circuit to the positive polarity and the negative polarity is improved, and thus the assemblability between a) the signal processing circuit and b) the signal input circuit for fire alarm, for example, in the whole emergency lighting device is also improved. In addition, the connection structure can simultaneously support detection processing of the active signal and the passive signal, and improves compatibility of the signal processing circuit on the active signal and the passive signal.

Furthermore, in some embodiments, an (analog) power supply is connected to the input of the opto-isolator (e.g., the anode of the photodiode), whereby an electrical signal can be output using the electrical power of the analog power supply and a signal transmission path is established from a) the analog power supply to b) the signal input port by means of corresponding electronic components such as resistors, rectifier bridges, etc. Thereby enabling the signal processing circuit to compatibly receive (receive) and process: active signal, passive signal.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic diagram of a signal processing circuit for passive signals in the prior art;

FIG. 2 is a schematic diagram of a prior art signal processing circuit for active signals;

fig. 3 is a schematic diagram of a signal processing circuit for passive or active signals according to one embodiment of the utility model;

FIG. 4 shows a schematic diagram of the feed topology between an energy storage device in an emergency power box and a light source panel in an external luminaire, according to an embodiment of the invention;

In the description of the drawings, identical, similar or corresponding reference numerals indicate identical, similar or corresponding elements, elements or functions.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the various described embodiments. It will be apparent, however, to one of ordinary skill in the art that the various described embodiments may be practiced without these specific details. In other instances, well-known methods, procedures, components, circuits, and networks have not been described in detail so as not to unnecessarily obscure aspects of the embodiments.

The terminology used in the description of the various illustrated embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various described embodiments and in the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The word "through" as used in this application may be interpreted as "by" (by), "dependent" (by virtue of) or "by" (by means of) depending on the context. The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, "when … …" or "when … …" in some embodiments may also be interpreted as conditional assumptions of "if", "like", etc., depending on the context. Similarly, the phrases "if (stated condition or event)", "if determined" or "if detected (stated condition or event)", depending on the context, can be interpreted as "when determined" or "in response to a determination" or "when detected (stated condition or event)". Similarly, the phrase "responsive to (a stated condition or event)" in some embodiments may be interpreted as "responsive to detection (a stated condition or event)" or "responsive to detection (a stated condition or event)" depending on the context.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, a first may also be referred to as a second, and vice versa, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at …" or "at …" or "in response to a determination" depending on the context.

The application is further illustrated by means of examples which follow, without thereby restricting the scope of the application thereto.

Fig. 3 is a schematic diagram of a signal processing circuit for passive or active signals according to one embodiment of the present utility model. The signal processing circuit includes:

An opto-coupler isolator OPT1;

A rectifier bridge DB1;

The signal input port P1 is connected to the input terminal OPI23 of the opto-isolator OPT1 through the rectifier bridge DB 1.

Optionally, IN some embodiments, the signal input port P1 includes a first terminal 1 and a second terminal 2, which are respectively connected to the first input terminal in_1 and the second input terminal in_2 of the rectifier bridge DB 1;

the output terminals ou_1, ou_2 of the rectifier bridge DB1 are connected to the input terminal OPI23 of the opto-isolator OPT 1.

Alternatively, in the signal processing circuit of some embodiments, two opposite bridge arms of the rectifier bridge DB1 are diodes with the same conduction direction, such as diodes A2 and C2, or diodes D2 and B2, respectively, as shown in fig. 3.

The two adjacent bridge arms of the rectifier bridge DB1 are diodes with opposite conducting directions, such as diodes A2 and B2, or diodes C2 and D2, respectively.

Optionally, in the signal processing circuit of some embodiments, the rectifier bridge DB1 includes a first diode A2, a second diode B2, a third diode C2, and a fourth diode D2;

the anode of the first diode A2 is connected with the anode of the second diode B2, and the connection point is used as a first output end OU_1 of the rectifier bridge DB 1;

The cathode of the third diode C2 is connected with the cathode of the fourth diode D2, and the connection point is used as a second output end OU_2 of the rectifier bridge DB 1;

The cathode of the first diode A2 is connected with the anode of the fourth diode D2, and the connection point is used as a first input end IN_1 of the rectifier bridge DB 1;

The cathode of the second diode B2 is connected with the anode of the third diode C2, and the connection point is used as a second input end IN_2 of the rectifier bridge DB 1; and

The first output end OU_1 is connected to the cathode of the phototransistor in the opto-isolator OPT 1;

the second output terminal ou_2 is connected to the anode of the phototransistor in the opto-isolator OPT 1.

Optionally, IN the signal processing circuit of some embodiments, the first input terminal in_1 is connected to the analog ground CG23 through a plurality of resistors R5 and R6 connected IN series, and a first connection point between the plurality of resistors R5 and R6 is connected to the first terminal 1 IN the signal input port P1; the second input terminal in_2 is connected to the second terminal 2 IN the signal input port P1.

Optionally, the signal processing circuit of some embodiments further includes a digital power supply VDD, a digital ground DG23, an analog power supply VCC, an analog ground CG23, and a fourth resistor R4;

the output end of the optocoupler isolator OPT1 is respectively connected with a digital power supply VDD and a digital ground DG23; the phototransistor is a photodiode;

An analog power supply VCC connected to the anode of the photodiode OPI 23; or alternatively

An analog power supply VCC connected to the input terminal of the opto-isolator OPT1 or the anode of the photodiode OPI23 therein through a fourth resistor R4;

the signal processing circuit further comprises a second resistor R2 connected across the anode and the cathode of the photodiode OPI 23.

Optionally, in the signal processing circuit of some embodiments, the analog power source VCC is coupled to the digital power source VDD through the power isolation module I23, as shown in the upper half of fig. 3;

The first output terminal ou_1 is connected to the cathode of the photodiode OPI23 through a third resistor R3.

Optionally, in the signal processing circuit of some embodiments, the power isolation module I23 is a power isolation transformer;

The collector electrode of the phototriode in the opto-coupler isolator OPT1 is connected to a digital power supply VDD through a first resistor R1;

the emitter of the phototriode in the opto-coupler isolator OPT1 is connected to the digital ground DG23;

The plurality of resistors R5, R6 include a fifth resistor R5 and a sixth resistor R6, a first connection point between the fifth resistor R5 and the sixth resistor R6 being connected to the signal input port P1 or the first terminal 1 among the signal input ports P1, or;

The first terminal 1 IN the signal input port P1 is connected to the first input terminal in_1 through a fifth resistor R5, and is connected to the analog ground CG23 through a sixth resistor R6.

The upper half of fig. 3 is a power isolation module for electrically isolating the analog power supply and the digital power supply, thereby protecting the circuit on one side of the phototransistor from the electrical influence of an external circuit.

When the signal input port P1 is not input, the opto-isolator OPT1 is not turned on. The collector QQ23 of the phototransistor outputs a high level due to the pull-up action of the first resistor R1.

When a passive signal is input from the signal input port P1, the (electrical signal) path of the output of the analog power supply VCC is: the fourth resistor R4, the photodiode, the third resistor r3, the diode b2 in the rectifier bridge DB1, and the second terminal 2 in the signal input port P1 also have a current flowing through them, so that a complete and simple signal transmission path from the analog power source VCC to the second terminal 2 is provided for the electric signal received (received) at the signal input port P1 through the fourth resistor R4, the third resistor R3, the sixth resistor R6, and other components in the electric signal path. The collector QQ23 of the phototransistor outputs a low level due to the conduction of the phototransistor in the opto-isolator OPT 1.

Alternatively, when a passive signal is accessed from the first terminal 1 of the signal input port P1, the signal transmission path is: analog power vcc→fourth resistor R4, photodiode→third resistor r3→first diode a2 in rectifier bridge DB1→fifth resistor r5→first terminal 1 in signal input port P1. Therefore, no matter whether the passive signal is input to the signal processing circuit through the first terminal 1 or the second terminal 2, the electric signal and its transmission path can be provided by means of the analog power supply and the above-mentioned third resistor, rectifier bridge, and the like.

When the signal input port P1 inputs an active signal, for example, the first terminal 1 in the port P1 is a positive polarity input terminal, and the second terminal 2 is a negative polarity input terminal, the active signal sequentially passes through: the first terminal 1 of the signal input port P1- > the fifth resistor r5- > the fourth diode d2 in the rectifier bridge DB 1- > the input end opi23 of the optocoupler OPT 1- > the third resistor r3- > the second diode b2 in the rectifier bridge DB 1- > the second terminal 2 of the signal input port P1. Thus, by the fifth resistor R5, the third resistor R3 and other components of the above-mentioned electrical signal path, a complete and simple signal transmission path from the first terminal 1 to the second terminal 2 thereof is provided for the electrical signal received at the signal input port P1. The collector QQ23 of the phototransistor outputs a low level due to the conduction of the phototransistor in the opto-isolator OPT 1.

When the signal input port P1 inputs an active signal, for example, the first terminal 1 in the port P1 receives an input of a negative polarity signal and the second terminal 2 receives an input of a positive polarity signal, the active signal sequentially passes through the third diode c2 in the rectifier bridge DB1, the input terminal opi23 of the optocoupler OPT1, the third resistor r3, the first diode a2 in the rectifier bridge DB1, the fifth resistor r5, and the first terminal 1 of the signal input port P1. Thus, by the third resistor R3, the fifth resistor R5 and other components in the above-mentioned electrical signal path, a complete and simple signal transmission path is provided for the electrical signal received at the signal input port P1 from the second terminal 2 to the first terminal 1 thereof. The collector QQ23 of the phototransistor outputs a low level due to the conduction of the phototransistor in the opto-isolator OPT 1.

In the above embodiment, the detection signal input ports 1, 2 may be multiplexed for the active signal and the passive signal, that is, the detection signal input ports 1, 2 may be connected to either the passive signal or the active signal, and the two signals may be connected to either the two terminals 1, 2 of the signal input port P1 without distinguishing the polarity of the active signal when connected to the signal input ports 1, 2, and may be connected to either the passive signal without distinguishing the polarity of the active signal, which brings convenience to the assembly of the circuit and improves the assemblability of the signal detection circuit.

The present signal detection circuit may be used in an emergency lighting controller for detecting an output signal of a fire alarm device, such as an active 24V signal, or a passive signal, both of which may be effectively detected by the signal detection circuit in the above-described embodiments. The assemblability of the emergency lighting devices such as the emergency lighting controller, the emergency lighting centralized power supply, the emergency lighting distribution device or the emergency lighting distribution box is also improved.

Fig. 4 shows a macroscopic schematic of an electrical connection topology C311 between schematic power storage components and light source panels of power storage components 210 and 211, electrical components and sub-components in an emergency lighting fixture according to some embodiments of the application. Each of the power storage components 210 and 211 includes a connection-end anode and a connection-end cathode. For example, the power storage assembly 210 has a connection-end anode connected to the bus bar 234 and a connection-end cathode connected to the bus bar B341. In addition, the power storage element 211 has a connection-end anode connected to the bus bar B343 and a connection-end cathode connected to the switch ONOFF 361.

As shown in fig. 4, switches ONOFF361, ONOFF362, ONOFF365, and ONOFF367 are single-pole double throw (single-pole double throw). For example, any or all of switches ONOFF361, ONOFF362, ONOFF365, and ONOFF367 may be of the "ON-ON" or "ON-OFF-ON" type of single pole double throw switch. Any or all of switches ONOFF361, ONOFF362, ONOFF365, and ONOFF367 may include one or more contactors, relays, transistors. For example, switches ONOFF361, ONOFF362, ONOFF365, and ONOFF367 may all be single pole double throw contactors. In another embodiment, switches ONOFF361, ONOFF362, ONOFF365, and ONOFF367 may each include two single pole single throw (single pole single throw) contactors that are properly wired to achieve single pole double throw connectivity. As shown in fig. 4, the switches ONOFF371 and ONOFF373 are each single-pole single-throw switches configured to connect and disconnect a corresponding one of the connection terminals of the battery charging unit EU381 to and from the bus bars B341 and B343. Either or both of the switches ONOFF371 and ONOFF373 may include contactors, relays, transistors.

As shown in fig. 4, the power storage components 210 and 211 are coupled in series. For example, switch ONOFF361 and switch ONOFF362 are configured to connect a connection terminal anode of power storage device 210 to a connection terminal cathode of power storage device 211. The light source panel 31 of the fire emergency lighting fixture is shown connected to the power storage assembly 210 through switch ONOFF367 and switch ONOFF 365. As shown in fig. 4, switch ONOFF367 connects bus bar B341 to the cathode connection of light source plate 31, and switch ONOFF365 connects bus bar 234 to an anode connection of light source plate 31.

In some embodiments, power storage assembly 210 may also be referred to as a battery cell, and may also include modules 313, 315, 317, and 319. In some embodiments, the power storage component 211 may also include sub-modules 203, 205, 207, and 209, which may also be referred to as battery cells. For example, the electrical storage component 210 may be referred to as a "string of battery cells" (i.e., battery cells coupled in series). The voltage of the electric storage assembly 210 may be a combination of the battery cells 313, 315, 317, and 319. For example, as schematically shown in fig. 4, the voltage of the electric storage assembly 210 is the sum of the voltages of each of the battery cells 313, 315, 317, and 319. In another embodiment, the electrical storage component (e.g., electrical storage component 210 or electrical storage component 211) may include one or more battery cells coupled in parallel (e.g., to increase the current capacity of the electrical storage component). For clarity, the application is described in terms of an electrical storage assembly.

For simplicity, topology C311 illustrates two electrical storage components, but more than two electrical storage components may be managed in accordance with the present application. For example, three power storage components operating at 220V respectively may be connected using a switch configuration in parallel (e.g., charged at 110V) or in series (e.g., charged at 220, 240V). In another embodiment, three power storage components, each operating at 220 volts, may be configured in parallel (i.e., in parallel) (e.g., charged at 220 volts), or two of the three may be configured in parallel and then in series with the third (e.g., charged at 220V, 240 volts). Any suitable number of power storage components (e.g., coupled in series or parallel with a switch arrangement) may be managed in accordance with the present application. It will be appreciated that the electrical storage assembly may include one or more sub-modules (e.g., separate sub-modules that may be coupled together to form a module).

[ Alternative embodiment ]:

embodiment 1. A signal processing circuit is characterized by comprising:

An optocoupler isolator;

A bridge rectifier unit;

And the signal input port is connected to the input end of the optical coupler isolator through the bridge rectifying unit.

2. The signal processing circuit according to embodiment 1, wherein,

The signal input port comprises a first terminal and a second terminal which are respectively connected to a first input end and a second input end of the bridge rectifying unit;

And the output end of the bridge rectifying unit is connected to the input end of the optical coupler isolator.

3. The signal processing circuit according to embodiment 2, wherein the bridge rectifier unit is a rectifier bridge;

Two opposite bridge arms of the rectifier bridge are diodes with the same conducting direction respectively;

two adjacent bridge arms of the rectifier bridge are diodes with opposite conducting directions respectively.

4. The signal processing circuit according to embodiment 3, wherein the rectifier bridge includes: a first diode, a second diode, a third diode, a fourth diode;

the anode of the first diode is connected with the anode of the second diode, and the connection point of the anode of the first diode is used as a first output end of the rectifier bridge;

the cathode of the third diode is connected with the cathode of the fourth diode, and the connection point of the cathode of the third diode is used as a second output end of the rectifier bridge;

The cathode of the first diode is connected with the anode of the fourth diode, and the connection point of the cathode of the first diode is used as the first input end of the rectifier bridge;

The cathode of the second diode is connected with the anode of the third diode, and the connection point of the second diode is used as the second input end of the rectifier bridge; and

The first output end is connected to the cathode of the phototransistor in the opto-isolator;

the second output terminal is connected to the anode of the phototransistor in the optocoupler isolator.

5. The signal processing circuit according to embodiment 4, wherein the first input terminal is connected to an analog ground through a plurality of resistors connected in series, a first connection point between the plurality of resistors being connected to a first terminal in the signal input port; the second input terminal is connected to a second terminal in the signal input port.

6. The signal processing circuit of embodiment 5, further comprising a digital power supply, a digital ground, an analog power supply, an analog ground, a fourth resistor;

The output end of the optical coupler isolator is respectively connected with the digital power supply and the digital ground; the phototransistor is a photodiode;

the analog power supply is connected to the anode of the photodiode; or alternatively

The analog power supply is connected to the input end of the optocoupler isolator or the anode of the photodiode in the optocoupler isolator through the fourth resistor;

The signal processing circuit further comprises a second resistor connected across the anode and the cathode of the photodiode.

7. The signal processing circuit according to embodiment 6, wherein,

The analog power supply is coupled with the digital power supply through the power isolation module;

the first output terminal is connected to the cathode of the photodiode through a third resistor.

8. The signal processing circuit of embodiment 7, wherein the power isolation module is a power isolation transformer;

The collector electrode of the phototriode in the optocoupler isolator is connected with the digital power supply through a first resistor;

An emitter of a phototriode in the optocoupler isolator is connected to the digital ground;

The plurality of resistors includes a fifth resistor and a sixth resistor, the first connection point between the fifth resistor and the sixth resistor being connected to the signal input port or the first terminal therein, or;

The first terminal in the signal input port is connected to the first input terminal through the fifth resistor and to the analog ground through the sixth resistor.

9. An emergency lighting device, comprising: the signal processing circuit of any of embodiments 1-8.

10. The emergency lighting device of embodiment 9, comprising one of: an emergency lighting controller, an emergency lighting centralized power supply, an emergency lighting distribution device or an emergency lighting distribution box.

It should be noted that: in some of the embodiments described above and below, "bridging" and "connecting" are not limited to direct connection between two components or assemblies, but may be implemented as: a direct connection, or an indirect connection through a resistor or the like. For example, in fig. 3, the connection between the first output terminal ou_1 of the rectifier bridge and (the cathode of) the photodiode in the electro-optic isolator can be understood as: the first output terminal ou_1 is connected to the cathode of the photodiode through a resistor R3, and an indirect "connection" structure is formed in the circuit between the first output terminal ou_1 and the cathode of the photodiode.

Accordingly, the expression "coupled" and "connected" may be used to describe some embodiments using their derivatives. It should be understood that these terms are not intended as synonyms for each other. For example, some embodiments may be described using the term "connected" to indicate that two or more elements are in direct physical or electrical contact with each other. In another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact. However, the term "coupled" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments are not limited in this context.

All embodiments in the specification are described in a progressive manner, all the same and similar parts of all the embodiments are mutually referred to, all the optional technical features can be combined with other embodiments in any reasonable manner, and any reasonable combination of contents among all the embodiments and under all the titles can also occur. Each embodiment focuses on differences from the other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two. It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

While specific embodiments of the application have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the application is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the application, but such changes and modifications fall within the scope of the application.

Claims (10)

1. A signal processing circuit, comprising:

An optocoupler isolator;

A bridge rectifier unit;

The signal input port is connected to the input end of the optical coupler isolator through the bridge rectifying unit;

a digital power supply;

simulating a power supply;

A power isolation module;

the analog power supply is coupled with the digital power supply through the power isolation module.

2. The signal processing circuit of claim 1, wherein the signal processing circuit comprises a logic circuit,

The signal input port comprises a first terminal and a second terminal which are respectively connected to a first input end and a second input end of the bridge rectifying unit;

And the output end of the bridge rectifying unit is connected to the input end of the optical coupler isolator.

3. The signal processing circuit of claim 2, wherein the bridge rectifier unit is a rectifier bridge;

Two opposite bridge arms of the rectifier bridge are diodes with the same conducting direction respectively;

two adjacent bridge arms of the rectifier bridge are diodes with opposite conducting directions respectively.

4. A signal processing circuit according to claim 3, wherein the rectifier bridge comprises: a first diode, a second diode, a third diode, a fourth diode;

the anode of the first diode is connected with the anode of the second diode, and the connection point of the anode of the first diode is used as a first output end of the rectifier bridge;

the cathode of the third diode is connected with the cathode of the fourth diode, and the connection point of the cathode of the third diode is used as a second output end of the rectifier bridge;

The cathode of the first diode is connected with the anode of the fourth diode, and the connection point of the cathode of the first diode is used as the first input end of the rectifier bridge;

The cathode of the second diode is connected with the anode of the third diode, and the connection point of the second diode is used as the second input end of the rectifier bridge; and

The first output end is connected to the cathode of the phototransistor in the opto-isolator;

the second output terminal is connected to the anode of the phototransistor in the optocoupler isolator.

5. The signal processing circuit of claim 4, wherein the first input is connected to analog ground through a plurality of resistors in series, a first connection point between the plurality of resistors being connected to a first terminal in the signal input port; the second input terminal is connected to a second terminal in the signal input port.

6. The signal processing circuit of claim 5, further comprising a digital ground, an analog ground, a fourth resistor;

The output end of the optical coupler isolator is respectively connected with the digital power supply and the digital ground; the phototransistor is a photodiode;

the analog power supply is connected to the anode of the photodiode; or alternatively

The analog power supply is connected to the input end of the optocoupler isolator or the anode of the photodiode in the optocoupler isolator through the fourth resistor;

The signal processing circuit further comprises a second resistor connected across the anode and the cathode of the photodiode.

7. The signal processing circuit of claim 6, wherein the first output is connected to a cathode of the photodiode through a third resistor.

8. The signal processing circuit of claim 7, wherein the power isolation module is a power isolation transformer;

The collector electrode of the phototriode in the optocoupler isolator is connected with the digital power supply through a first resistor;

An emitter of a phototriode in the optocoupler isolator is connected to the digital ground;

The plurality of resistors includes a fifth resistor and a sixth resistor, the first connection point between the fifth resistor and the sixth resistor being connected to the signal input port or the first terminal therein, or;

The first terminal in the signal input port is connected to the first input terminal through the fifth resistor and to the analog ground through the sixth resistor.

9. An emergency lighting device, comprising: the signal processing circuit of any of claims 1-8.

10. The emergency lighting device of claim 9, comprising one of: an emergency lighting controller, an emergency lighting centralized power supply, an emergency lighting distribution device or an emergency lighting distribution box.